Resistors
Precision Thin Film
Nichrome Chip Resistors
PCF Series
Precision thin film technology
Extended ohmic range 1R - 3M
Precision to ±0.01% and 2ppm/°C
Passivated range for superior humidity performance
Load life stability and humidity to 0.05%
Pb-free standard with SnPb option
AEC-Q200 grade available
All Pb-free parts comply with EU Directive 2011/65/EU (RoHS2)
Electrical Data - Standard Range
Type
TCR (ppm/°C)
Power (W)
50
PCF0201
0.031
25
50
25
15
PCF0402
0.063
10
5
3
2
50
25
15
PCF0603
0.063
10
5
3
2
50
25
15
PCF0805
0.1
10
5
3
2
50
25
15
PCF1206
0.125
10
5
3
2
50
25
15
10
PCF1210
0.2
5
3
2
50
25
15
PCF2010
0.25
10
5
3
2
50
25
15
PCF2512
0.5
10
5
3
2
Note 1: Standard values E24 or E96. Other values may be available by request.
Limiting Element
Voltage (V)
15
1% & 0.5%
49R9-33K
49R9-5K
0.25%
Ohmic Value Range
1
0.1%
-
10R-205K
25
49R9-70K
49R9-12K
49R9-5K
-
49R9-12K
49R9-3K
49R9 - 4K99
2R-1M
50
4R7-1M
4R7-332K
-
24R9-15K
0.05%
0.01%
-
4R7-332K
24R9-100K
24R9 – 15K
-
1R-2M
100
4R7-2M
4R7-511K
24R9-200K
-
24R9-200K
24R9-30K
-
24R9-200K
-
1R-2M5
150
4R7-2M5
4R7–1M
4R7-1M
-
24R9-500K
-
24R9-49K9
4R7-2M5
4R7–1M
1R-2M5
150
-
-
24R9-50K
4R7-3M
4R7-1M
-
24R9-500K
1R-3M
150
4R7-1M
-
24R9-100K
4R7-3M
4R7-1M
-
24R9-500K
1R – 3M
150
4R7-1M
-
24R9-100K
General Note
TT Electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
BI Technologies IRC Welwyn
http://www.ttelectronics.com/resistors
© TT Electronics plc
12.16
Precision Thin Film
Nichrome Chip Resistors
PCF Series
Electrical Data - AEQ-Q200 Grade - Standard Range
Type
PCF0402…A
TCR
(ppm/ºC)
Power
(W)
0.063
0.063
0.1
0.125
0.25
0.25
0.5
Limiting
Element
Voltage (V)
25
50
100
150
150
150
150
10R – 1M0
10R – 499K
Ohmic Value Range *
1%
0.5%
0.25%
0.1%
0.05%
49R9 – 10K
10R – 49K9
10R – 100K
10R – 200K
50
25
50
PCF0603…A
25
50
PCF0805…A
25
50
PCF1206…A
25
50
PCF1210…A
25
50
PCF2010…A
25
50
PCF2512…A
25
* Standard values E24 or E96.
49R9 – 100K
10R – 332K
Electrical Data – High Power Range
Type
TCR (ppm/°C)
50
25
15
10
5
3
2
50
25
15
10
5
3
2
50
25
15
10
5
3
2
50
25
15
10
5
3
2
50
25
15
10
5
3
2
50
25
15
10
Power (W)
Limiting Element
Voltage (V)
0.5%
0.25%
4R7-1M
0.1
75
-
1R-1M
0.125
150
-
4R7-332K
4R7-511K
4R7-1M
4R7-332K
24R9-15K
24R9-15K
Ohmic Value Range
*
0.1%
0.05%
4R7-332K
0.01%
24R9-100K
PCF0603H
4R7-511K
24R9-200K
PCF0805H
24R9-30K
24R9-30K
4R7-1M
0.25
200
-
24R9-50K
24R9-49K9
24R9-500K
PCF1206H
4R7-1M
0.33
200
-
24R9-50K
24R9-49K9
24R9-500K
PCF1210H
4R7-1M
0.33
200
-
24R9-50K
24R9-49K9
24R9-500K
PCF2010H
PCF2512H
0.75
200
1R-2K
4R7-2K
24R9-2K
* Standard values E24 or E96. Other values may be available by request.
General Note
TT Electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
BI Technologies IRC Welwyn
http://www.ttelectronics.com/resistors
© TT Electronics plc
12.16
Precision Thin Film
Nichrome Chip Resistors
Physical Data
Dimensions (mm) Weight (mg)
Electrical
&
Data - Passivated Range
L
Tmax
A
0201
Type
0402
0603
PCF0402P
0805
1206
1210
PCF0603P
2010
2512
PCF0805P
L
0.6 ± 0.05
TCR
(ppm/ºC)
1.0 ± 0.05
50
1.6 ± 0.2
25
2.0 ± 0.2
15
3.2 ± 0.2
50
25
3.2 ± 0.2
15
4.9 ± 0.2
50
6.3 ± 0.2
W
Power
0.3 ± 0.05
(W)
0.5 ± 0.05
0.8 ± 0.2
0.063
1.25 ± 0.2
1.6 ± 0.2
2.6 ± 0.2
0.063
2.4 ± 0.2
3.1 ± 0.2
0.1
Tmax
A
0.26
0.12 ± 0.05
Limiting Element
(V)
0.40
Voltage
0.2 ± 0.1
0.55
0.3 ± 0.2
25
0.4 ± 0.2
0.65
0.65
0.5 ± 0.2
50
0.45 ± 0.2
0.50
0.65
0.5 ± 0.2
0.65
0.5 ± 0.2
100
Ohmic Value Range
TCR
Power
Limiting Element
Type
Ohmic Value Range *
0.05%
Power
Limiting
(ppm/ºC)
(W)
Voltage (V)
0.5%
0.25%
0.1%
TCR
Type
(W)
Element
0.5%
0.25%
0.1%
0.05%
(ppm/ºC)
50
Voltage (V)
25
50
4R7-332K
PCF0603H
0.1
75
15
4R7-1M
25
10
4R7-332K
15
PCF Series
0.1
75
PCF0603H
5
24R9-15K
4R7-332K
10
50
25
4R7-1M
4R7-511K
5
24R9-15K
PCF0805H
15
0.125
150
50
1R-1M
4R7–1M
10
4R7-511K
25
4R7-511K
5
24R9-30K
0.125
150
PCF0805H
15
4R7-1M
50
4R7-511K
10
25
5
24R9-30K
4R7-1M
PCF1206H
0.25
200
15
50
Limiting
Ohmic Value Range *
10
TCR
Power
25
4R7-1M
24R9-50K
Type
Element
5
15
(ppm/ºC)
(W)
0.25
200
PCF1206H
1%
0.5%
0.25%
0.1%
50
Voltage (V)
10
25
5
24R9-50K
50
4R7-1M
50
PCF1210H
0.33
PCF0603H…A
15
0.1
75
200
10R – 332K
25
25
10
4R7-1M
15
50
0.33
200
PCF1210H
5
24R9-50K
PCF0805H…A
0.125
150
10
25
24R9-50K
5
50
50
PCF1206H…A
0.25
200
25
25
0.33
200
15
PCF2010H
10R
4R7-1M
– 1M0
50
Ohmic Value Range *
10
PCF1210H…A
0.33
200
TCR
Power
Limiting Element
5
24R9-50K
25
Type
0.5%
0.25%
0.1%
0.05%
(ppm/ºC)
(W)
Voltage (V)
50
50
25
PCF2010H…A
0.33
200
50
0.75
200
1R-2K
4R7-2K
PCF2512H
25
15
25R-25K
25
PCF0402P
0.063
25
10
15
49R9-12K
* Standard values E24 or
50
Other values may be available by request.
E96.
25R-332K
PCF0603P
25
0.063
50
15
25R-100K
50
10R-800K
PCF0805P
25
0.1
100
Limiting
Ohmic
25R-200K
Value Range *
15
TCR
Power
Element
50
Type
10R-1M
(ppm/ºC)
(W)
Voltage
25
PCF1206P
0.125
150
0.5%
0.25%
0.1%
0.05%
(V)
15
25R-500K
50
50
0.166
100
10R-332K
10R-1M
PCF0603X
25
PCF2010P
25
0.25
150
50
15
25R-500K
0.25
150
10R-500K
PCF0805X
25
50
50
0.333
200
10R-1M
10R-1M
PCF1206X
PCF2512P
25
0.5
150
25
15
25R-500K
50
1
200
1R-100R
4R7-100R
PCF2512X
25
Electrical Data - High Power Range
Electrical Data - High Power Range
0.01%
0.01%
24R9-100K
24R9-100K
24R9-200K
24R9-200K
Electrical Data - AEQ-Q200 Grade – High Power Range
24R9-500K
24R9-500K
0.05%
24R9-500K
10R – 49K9
24R9-500K
10R – 100K
10R – 200K
24R9-500K
Electrical Data - Passivated Range
0.01%
10R – 499K
24R9-2K
Electrical Data - Extended High Power Range
0.01%
* Standard values E24 or E96. Other values may be available by request.
25
15
50
Construction
25
10R-1M
0.125
150
PCF1206P
A thin-film material is selectively deposited on a 96% alumina substrate together with metallic contacts at each end of the resistor.
15
50
10R - 1M5
The unadjusted resistors are heat treated to give the required TCR and stability, then a precisely controlled laser trim process adjusts
0.25
150
PCF2010P
the resistance value.
25
Epoxy protection is applied and wrap-around terminations are added and plated with Nickel then Tin. Each
15
25R - 1M
resistor is measured immediately before packing into tape.
50
10R - 1M5
25
0.5
150
PCF2512P
15
25R - 1M
Terminations
The chips are
E24 or E96. Other values may
matte plated wrap-around terminations suitable for soldering.
* Standard values
supplied with 100% Sn
be available by request.
C
0.12 ± 0.05
0.2
0.5%
± 0.1
0.3 ± 0.2
0.4 ± 0.2
0.5 ± 0.2
0.5 ± 0.2
0.6 ± 0.2
0.6 ± 0.2
Wt
Ohmic Value Range *
1
0.25%
0.1%
3
6
25R-25K
A
9
49R9-12K
20
L
W
A
25
25R-332K
Wrap-around terminations
36
(3 faces)
55
10R - 1M
C
T
General Note
TT Electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
BI Technologies IRC Welwyn
http://www.ttelectronics.com/resistors
© TT Electronics plc
12.16
Precision Surface
Precision Thin Film
Mount Resistors
Nichrome Chip Resistors
PCF Series
PCF Series
Physical Data
L
0201
0.58 0.05
0402
1.0 0.05
0603
1.6 0.2
0805
2.0 0.2
1206
3.05 0.15
1210
PCF Series
PCF Series
3.10 0.15
2010
4.9 0.2
2512
6.3 0.2
Precision Surface Mount Resistors
Precision Surface Mount Resistors
Dimensions (mm) and Weight (mg)
W
T max
A
0.29 0.05
0.26
0.15 0.05
0.5 0.05
0.55
0.2 0.1
0.8 0.2
0.65
0.3 0.2
1.25 0.2
0.65
0.4 0.25
1.55 0.15
0.65
0.35 0.25
2.4 0.15
0.65
0.55 0.25
2.4 0.2
0.65
0.5 0.25
3.1 0.2
0.65
0.5 0.25
C
0.12
0.2
0.3
0.3
0.42
0.4
0.6
0.6
0.05
0.1
0.2
0.2
0.2
0.2
0.3
0.3
Wt
0.14
0.54
1.8
4.7
9.0
10
24
38
C
T
A
L
A
W
Wrap-around terminations
(3 faces)
Construction
A thin-film material is selectively deposited on a 96% alumina substrate together with metallic contacts at each end of the resistor.
The unadjusted resistors are heat treated to give the required TCR and stability, then a precisely controlled laser trim process adjusts
the resistance value. Epoxy protection is applied
and Weight (mg)
Dimensions (mm)
and wrap-around terminations are added and plated with Nickel then Tin. Each
Dimensions (mm) and Weight (mg)
resistor is measured immediately before packing into tape.
L
W
T max
A
C
Wt
Physical Data
Performance Data - Standard Range
SnPb Termination Option Range
Test Parameters
TCR
(ppm/°C)
Power
(W)
L
W
T max
0201
0.05
0.29 0.05
0.05
0.26
0.58 0.05
0201
0.29
0.26
Terminations
0.58
0402
0.05
0.5 0.05
0.05
0.55
1.0 0.05
0402
0.55
1.0
The standard termination is
0.5 0.2
matte plated
100% Sn
0603
0.2
0.8 0.2
0.65
1.6 0.2
0603
0.8
1.6
range PCF over the restricted range below.
0.65
0805
1.25 0.2
0.65
2.0 0.2
0805
1.25 0.2
0.65
2.0 0.2
1206
0.15
1.55 0.15
0.15
0.65
3.05 0.15
1206
1.55
0.65
3.05
1210
2.4 0.15
0.65
3.10 0.15
1210
2.4 0.15
0.65
3.10 0.15
2010
0.2
2.4 0.2
0.2
0.65
4.9 0.2
2010
2.4
0.65
4.9
2512
0.2
3.1 0.2
0.2
0.65
6.3 0.2
2512
3.1
0.65
6.3
Conditions
A
0.15 0.05
0.15 0.05
0.2 0.1
0.2 0.1
wrap-around
0.3 0.2
0.3 0.2
0.4 0.25
0.4 0.25
0.35 0.25
0.35 0.25
0.55 0.25
0.55 0.25
0.5 0.25
0.5 0.25
0.5 0.25
0.5 0.25
C
0.12 0.05
0.12 0.05
0.2 0.1
0.2 0.1
suitable for
0.3 0.2
0.3 0.2
0.3 0.2
0.3 0.2
0.42 0.2
0.42 0.2
0.4 0.2
0.4 0.2
0.6 0.3
0.6 0.3
0.6 0.3
0.6 0.3
Wt
0.14
0.14
0.54
0.54
soldering.
1.8
1.8
4.7
4.7
9.0
9.0
10
10
24
24
38
38
C
C
T
SnPb plated option is available for
T
standard
A
A
L
L
A
A
W
W
Maximum change (+0.05R)
Wrap-around terminations
Wrap-around terminations
(3 faces)
(3 faces)
Type
Construction
0.5%
0.25%
0.1%
to 2512
Construction
0603
0201, 0402
A thin-film material is selectively deposited on a 96% alumina substrate together with metallic contacts at each end of the resistor.
substrate
at each end of the resistor.
A thin-film material is selectively deposited on a 96% alumina
@ 70°C
together with metallic contacts
250K
0.05%
0.25%
0.5%
Load life
1000 hours
50
10R –
The unadjusted resistors are heat treated to give the
rated load
TCR and stability, then a precisely controlled laser trim process adjusts
required
The unadjusted resistors are heat treated to give the required TCR and stability, then a precisely controlled laser trim process adjusts
0.05%
0.3%
Humidity
hours
PCF0805
100
the resistance value. Epoxy protection is
1000
0.1
and
40°C, 90 - 95%RH
protection is applied and wrap-around terminations are added and plated
–
with Nickel then Tin. Each
applied
@
wrap-around terminations
0.3%
are added and plated with Nickel then Tin. Each
10R 100K
the resistance value. Epoxy
25
0.05%
0.5%
0.5%
Short term overload
6.25 x rated
into
, or 2
resistor is measured immediately before packing into tape.
15
10R – 100K
resistor is measured immediately before packing
Power
tape.
x LEV, for 5 sec
50
10R – 500K
Terminations
Terminations
0.05%
0.1%
0.1%
Temperature cycle
5 cycles -55 C, 125°C
PCF1206
termination is 100% Sn matte plated wrap-around suitable for soldering. SnPb plated
– 200K
is available for standard
25
0.125
150
10R
option
The standard termination is 100% Sn matte plated wrap-around suitable for soldering. SnPb plated option is available for standard
The standard
solder heat
0.05%
0.2%
0.2%
Resistance to
270°C, 10 sec
15
10R – 200K
range PCF over the restricted range below.
range PCF over the restricted range below.
Solderability
235°C, 2 sec
95% minimum coverage
High temperature operation
1000 hours at 125°C
0.25%
0.25%
0.25%
Limiting Element
>0.05% tolerance
Voltage (V)
1%
0603 to 2512
Ohmic Value Range
≤0.05%
tolerance
Chip size
Performance Data - High Power Range/Extended High Power Range
Performance Data - Standard Range
Load life
Humidity
Short term overload
Load life
Load life
High temperature operation
Humidity
Humidity
Temperature cycle
Short term overload
Short term overload
Resistance to solder heat
High temperature operation
High temperature operation
Solderability cycle
Temperature
Temperature cycle
Resistance to solder heat
Resistance to solder heat
Solderability
Solderability
Test Parameters
Test Parameters
Test Parameters
Performance Data - Passivated Range
Test Parameters
Load life
Test Parameters
Load life
Humidity
Load life
Humidity
Short term overload
Humidity
Short term overload
High temperature operation
Short term overload
High temperature
Temperature cycle operation
High temperature operation
Temperature solder
Resistance to cycle heat
Temperature cycle
Resistance to
Solderability solder heat
Resistance to solder heat
Solderability
Solderability
Conditions
Conditions
1000 hours rated load @ 70°C
1000 hours rated load @ 70°C
1000hrs @ 40°C, 90 - 95%RH
1000 hours rated load @ 70°C
1000hrs @ 40°C, 2 x - 95%RH
6.25 1000hrsPower, or 90 -LEV, for 5 sec
x rated @ 40°C, 90 95%RH
6.25 x rated Power, or 2125°C for 5 sec
1000 hours at x LEV,
6.25 x rated Power, or 2 x LEV, for 5 sec
1000 hours at 155°C
5 cycles -55 C, 125°C
1000 hours at 155°C
5 cycles -55°C, 150°C
270°C, 10 150°C
5 cycles -55°C,sec
270°C, 10 sec
235°C, 2 sec
270°C, 10sec
235°C, 2 sec
235°C, 2 sec
1000 hours rated load @ 70°C
0.5%
≤0.05%
tolerance
>0.05% tolerance
Chip size
≤0.05%
tolerance
>0.05% tolerance
Chip size
0.5%
1000hrs @ 40°C, 90 - 95%RH
0603 to 2512
0603 to 2512
to 2512
0201, 0402
0402
0603 to 2512
0603
0201,
0.5%
6.25 1000 hours rated 2 x LEV, 70°C sec
x rated Power, or load @ for 5
0.05%
0.25%
0.5%
0.05%
0.25%
0.5%
1000 hours rated load @ 70°C
0.5%
1000 hours at 155°C
0.05%
0.3%
0.3%
1000 hours @ 40°C, 90 - 95%RH
0.05%
0.3%
0.3%
1000 hours @ 40°C, 90 - 95%RH
0.25%
5 cycles -55°C,2 x LEV, for 5 sec
150°C
0.05%
0.5%
0.5%
6.25 x rated Power or
0.05%
0.5%
0.5%
6.25 x rated Power ,, or 2 x LEV, for 5 sec
0.2%
270°C, 10 sec
0.25%
0.25%
0.25%
1000 hours at 125°C
0.25%
0.25%
0.25%
1000 hours at 125°C
95% minimum coverage
235°C, C, 125°C
0.05%
0.1%
0.1%
5 cycles -552 sec
0.05%
0.1%
0.1%
5 cycles -55 C, 125°C
0.05%
0.2%
0.2%
270°C, 10 sec
0.05%
0.2%
0.2%
270°C, 10 sec
235°C, 2 sec
95% minimum coverage
235°C, 2 sec
95% minimum coverage
Conditions
Conditions
Conditions
Maximum change (+0.05R)
Maximum change (+0.05R)
Maximum change (+0.05R)
Test Parameters
Conditions
Maximum change (+0.05R)
Performance Data - High Power Range/Extended High Power Range
Performance Data - High Power Range/Extended High Power Range
0603 to 2512
0402
Maximum change (+0.05R)
0.05%
0.25%
Maximum change (+0.05R)
0.05%
0.5%
0.5%
0.5%
0.5%
0.02%
0.1%
0.5%
0.5%
0.05%
0.5%
0.5%
0.5%
0.02%
0.1%
0.5%
0.25%
0.02%
0.1%
0.25%
0.2%
95% minimum coverage
0.2%
95% minimum coverage
minimum coverage
95%
General Note
© Welwyn Components Limited
Bedlington Northumberland NE22 7AA, UK
Telephone:
reserves the right to make changes in product specification without notice or liability.
03.11
TT Electronics
+44 (0) 1670 822181 Facsimile: +44 (0) 1670 829465 Email: info@welwyn-tt.com Website: www.welwyn-tt.com
Test Parameters
Conditions
Maximum change (+0.05R)
Conditions
Maximum change (+0.05R)
All information
Test Parameters
own data and is considered accurate at time of going to print.
is subject to TT Electronics’
http://www.ttelectronics.com/resistors
0603 to 2512
0402
Performance Data - Passivated Range
Humidity
Humidity
Short term overload
Short term overload
1000 hours rated load @ 70°C
1000 hours rated load @ 70°C
1000hrs @ 40°C, 90 - 95%RH
1000hrs @ 40°C, 90 - 95%RH
6.25 x rated Power, or 2 x LEV, for 5 sec
6.25 x rated Power, or 2 x LEV, for 5 sec
BI Technologies IRC Welwyn
0402
0.25%
0.25%
0.5%
0.5%
0.1%
0.1%
Load life
©
Load life
TT Electronics plc
0603 to 2512
0.05%
0.05%
0.05%
0.05%
0.02%
0.02%
12.16
Performance Data - High Power Range/Extended High Power Range
Test Parameters
Load life
Precision Thin Film
Humidity
Short term overload
Nichrome Chip Resistors
Conditions
1000 hours rated load @ 70°C
1000hrs @ 40°C, 90 - 95%RH
6.25 x rated Power, or 2 x LEV, for 5 sec
1000 hours at 155°C
5 cycles -55°C, 150°C
270°C, 10 sec
235°C, 2 sec
Maximum change (+0.05R)
0.5%
0.5%
0.5%
0.5%
0.25%
0.2%
95% minimum coverage
PCF Series
cycle
Temperature
High temperature operation
Resistance to solder heat
Solderability
Performance Data - Passivated Range
Test Parameters
Load life
Humidity
Short term overload
High temperature operation
Temperature cycle
Resistance to solder heat
Solderability
Conditions
1000 hours rated load @ 70°C
1000hrs @ 40°C, 90 - 95%RH
6.25 x rated Power, or 2 x LEV, for 5 sec
1000 hours at 125°C
5 cycles -55 C, 125°C
270°C, 10 sec
235°C, 2 sec
Maximum change (+0.05R)
0603 to 2512
0.05%
0.05%
0.02%
0.05%
0.02%
0.02%
0402
0.25%
0.5%
0.1%
0.5%
0.1%
0.1%
0
100%
100%
70
100%
100%
125
35%
0%
Derating Curve
155
0%
© Welwyn Components Limited
Bedlington Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 Facsimile: +44 (0) 1670 829465 Email: info@welwyn-tt.com Website: www.welwyn-tt.com
95% minimum coverage
Precision Surface Mount Resistors
PCF Series
100%
80%
60%
40%
20%
0%
0
50
Temperature Derating
03.11
Proportion of Pr
Standard &
Passivated
High Power
Ranges
Derating Curve
100
150
Ambient Temperature (°C)
Solderability
The terminations have an electroplated nickel barrier and tin coating. This ensures excellent 'leach' resistance properties and
solderability.
Packaging
PCF Resistors are supplied taped and reeled as as per IEC 286-3. Sizes 2010 and 2512 are in embossed plastic tape.
Smaller sizes are in paper tape.
Application Notes
PCF resistors are ideally suited for handling by automatic methods due to their rectangular shape and the small dimensional
tolerances. Electrical connection to a ceramic substrate or to a printed circuit board can be made by reflow or wave soldering of
wrap-around terminations.
Wrap-around terminations provide good leach properties and ensure reliable contact. Due to the robust construction, the PCF can
be immersed in the solder bath for 30 seconds at 260°C. This enables the resistor to be mounted on one side of a printed circuit
board and wire-leaded components applied on the other side.
PCF resistors themselves can operate at a maximum temperature of 125°C (see performance above) (155°C for High Power grades).
For soldered resistors, the joint temperature should not exceed 110°C. This condition is met when the stated power levels at 70°C
are used.
General Note
TT Electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
BI Technologies IRC Welwyn
http://www.ttelectronics.com/resistors
© TT Electronics plc
12.16
