Wirewound Power
Radial Terminal Resistor
WPRT Series
·
·
·
·
·
·
·
10 to 50 watts
Quick connect or soldered tag terminals
Optional mounting bracket
High overload capability
AEC-Q200 qualified
Flameproof case
RoHS compliant
Electrical Data
WPRT10
Power rating at 25°C
Power rating at 70°C
5s overload rating at 25°C
Resistance range
Thermal impedance
Isolation voltage
TCR
Resistance Tolerance
Standard Values
Ambient temperature range
°C
watts
watts
watts
ohms
°C/watt
volts
ppm/°C
%
10
10
50
1R0 - 820R
18
WPRT15
15
12.3
75
1R0 – 1K0
14
WPRT20
20
16.4
100
2R0 – 1K2
12
1000
<20R: ±400,
≥20R:
±350
±5
E24
-55 to +155
WPRT30
30
24.6
150
3R0 – 1K5
8.5
WPRT40
40
32.8
200
6R0 – 1K5
7
WPRT50
50
41
250
6R0 – 1K5
7
Note: No LEV applies. Maximum voltage (dc or rms) is
√(P
x R)
Physical Data
Figure 1 - soldered tag (S) and the same with bracket (SB)
All dimensions in mm and weights in g
Maximum bow on length and width <1.00mm
Type
WPRT10
WPRT15
WPRT20
WPRT30
WPRT40
WPRT50
L
±1.5
48
48
63
75
90
90
W
±1.0
10
12.5
12.5
19
19
19
D
9.0 ±1.0
11.5 ±1.0
13.5 ±1.0
19 ±1.0
19 ±0.6
19 ±0.6
P
±1.0
32
32
44
54
70
70
ØJ
±0.2
4.1
4.1
4.1
4.1
4.1
4.1
C
±0.4
5.5
6.2
6.2
7.6
7.6
7.6
ØB
±0.2
2.5
2.5
2.5
3.2
3.2
3.2
K
±1.0
3.0
3.0
3.0
4.0
4.0
4.0
F
±0.5
8.7
8.0
10.0
9.5
9.5
9.5
G
±0.5
5.0
6.0
6.0
7.5
7.5
7.5
E
±0.5
12
12
12
18
18
18
H
±1.0
18
21
21
32
32
32
Weight (nom.)
S
11
18
27
66
81
81
SB
16.5
24
34
80
94
94
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.
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
© TT electronics plc
04.14
Wirewound Power
Radial Terminal Resistor
WPRT Series
Physical Data
Figure 2 - quick connect “amp” tag (A) and the same with bracket (AB)
All dimensions in mm and weights in g
Maximum bow on length and width <1.00mm
L
±1.5
48
48
63
75
90
90
W
±1.0
10
12.5
12.5
19
19
19
P
±1.0
32
32
44
54
70
70
ØJ
±0.2
4.1
4.1
4.1
6.0
6.0
6.0
K
±1.0
3.0
3.0
3.0
4.0
4.0
4.0
F
±0.5
8.7
8.0
10.0
9.5
9.5
9.5
G
±0.5
5.0
6.0
6.0
7.5
7.5
7.5
E
±0.5
12
12
12
18
18
18
H
±1.0
19
23.5
25
30
30
30
Weight (nom.)
A
11
18
27
66
81
81
AB
16.5
24
34
80
94
94
Type
WPRT10
WPRT15
WPRT20
WPRT30
WPRT40
WPRT50
D
9.0 ±1.0
1.5 ±1.0
13.5 ±1.0
19 ±1.0
19 ±0.6
19 ±0.6
Figure 3 – as configuration A but with tighter tolerance terminal alignment (AT) and the same with bracket (AD)
All dimensions in mm and weights in g
Maximum bow on length and width <1.00mm
Type
WPRT10
WPRT15
WPRT20
WPRT30
WPRT40
WPRT50
L
+0.5/-
1.0
48
48
63
75
90
90
W
+0.5/-1.0
10
12.5
12.5
19
19
19
D
9.0 ±1.0
11.5 ±1.0
13.5 ±1.0
19 ±1.0
19 ±0.6
19 ±0.6
P
±0.3
32
32
44
54
68
68
ØJ
±0.2
4.1
4.1
4.1
6.0
6.0
6.0
K
±1.0
3.0
3.0
3.0
4.0
4.0
4.0
F
±0.5
8.7
8.0
10.0
9.5
9.5
9.5
G
±0.5
5.0
6.0
6.0
7.5
7.5
7.5
E
±0.5
12
12
12
18
18
18
H
±1.0
19
23.5
25
30
30
30
Weight (nom.)
AT
11
18
27
66
81
81
AD
16.5
24
34
80
94
94
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.
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
© TT electronics plc
04.14
Wirewound Power
Radial Terminal Resistor
WPRT Series
Construction
A high purity ceramic rod, with force fit end caps onto which is wound a wire element. The element is fitted into a ceramic case
with fireproof insulation cement. The terminal material is tin plated steel.
Name
1
2
3
4
5
6
Rod
Filling Material
Ceramic Case
Terminal
Bracket
Wire Element
Main Material
Al
2
O
3
SiO
2
Al
2
O
3
CaO
Steel (tin plated)
Steel
Resistance Alloy
Termination Strength:
The terminations meet the requirements of IEC 86.2.21
Marking:
Power rating, resistance value and tolerance are legend marked.
Flammability:
The resistor will not burn under any condition of applied temperature or overload.
Solvent resistance:
The body protection and marking are resistant to all normal industrial solvents suitable for printed circuits.
Performance Data
Maximum
Load at rated power (1000hrs at 25°C and 70ºC)
Derating from rated power
Short term overload (5 x rated power)
Damp heat steady state (56 days, 40°C,
≥90%
RH)
Temperature rapid change (5 cycles -55ºC to +155ºC)
Resistance to solder heat
Voltage Proof (1kV for 60s)
Solderability
ΔR%
ΔR%
ΔR%
ΔR%
ΔR%
5
Zero at 275ºC (see graph)
5 +0.05Ω
5 +0.05Ω
2 +0.05Ω
1 +0.05Ω
No flashover, mechanical damage, arcing or breakdown
Min. 95% coverage
Derating Curve
350
Proportion of Rated Power (%)
100
80
15W-50W
Temperature
Rise
Body Temperature
Rise
50W
300
Temperature Rise (°C)
10W
250
200
150
100
50
0
10W
20W
15W
30W
40W
60
40
20
0
0
50
100
150
200
250
300
Am bient Tem perature (°C)
0
10
20
30
40
50
Pow er (W)
Am bient Tem perature (°C)
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.
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
© TT electronics plc
04.14
Wirewound Power
Radial Terminal Resistor
WPRT Series
Pulse Performance
The pulse energy capacity limits in the graph below relate to pulses below 100ms duration based on an instantaneous wire
temperature rise of 750ºC.
WPRT Series Energy Capability Graph
40&50W
30W
15W
20W
10W
Resistance value (ohms)
Application Notes
S and SB configurations have terminals which can be soldered. However, for full power operation, due to the possibility of high
terminal temperatures, it is recommended that the connections be secured mechanically, rather than relying on the solder joint alone.
AT and AD configurations are designed for use in molded housing assemblies, where the alignment of terminals and the body
dimensions must be defined to a greater tolerance.
Ordering Procedure
Example: WPRT50 at 1.2 kilohms 5% tolerance with quick connect “amp” tag terminals and bracket, bulk packed in a box of 168 pieces –
WPRT 50 AB – 1K2 J B168
Type
Power Rating
Configuration
S
SB
A
AB
AT
AD
Soldered tag without bracket
Soldered tag with bracket
Quick connect “amp” tag without bracket
Quick connect “amp” tag with bracket
Configuration A with tighter tolerance terminal alignment
Configuration AB with tighter tolerance terminal alignment
Figure 1
Figure 2
Figure 3
Value (use IEC62 code)
Tolerance (use IEC62 code)
J
5%
Packing
B440
B400
B270
B240
B168
WPRT10
WPRT15
WPRT20
WPRT30 / 40 / 50
440 / box
400 / box
270 / box Standard
S / A / AT
240 / box
SB / AB / AD 168 / box
Bulk
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.
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
© TT electronics plc
04.14
模拟与混合信号
