Flameproof Power
Metal Film Resistor
MFP Series
•
Flameproof protection
•
Small size for power rating
Electrical Data
IRC
Type
Power
Rating
@ 70°C
(watts)
0.5
Resistance
Range
(watts)
7R5 - 15R0
Limiting
Element
Voltage
(volts)
TCR
(ppm/°C)
Resistance
Tolerance*
(%)
Standard
Values
Thermal
Impedance
(°C/watt)
150
Ambient
Temperature
(°C)
MFP05
100
MFP1
<1 ohm: 0.7
>1 ohm: 1.0
0.1 - 1M
350
<1 ohm: 300
1 ohm-9.1 ohm: 200>10
ohm: 100
1, 2, 5
E24
preferred
120
-55 to 155
MFP2
2
1R0 - 1M
100
82
* Below 1 ohm 5% TOL preferred.
Environmental Data
Characteristic
Load: 1000 hours at 70°C
Shelf Life: 12 months at room temperature
Derating from rated power at 70°C
Climatic
Climatic Category
Temperature rapid change
Resistance to solder heat
Voltage proof
∆R
∆R
∆R
∆R
∆R
∆R
∆R
volts
Maximum
5
2
zero at 155°C
3
50/155/56
0.5
0.5
500 min
General Note
IRC reserves the right to make changes in product specification without notice or liability.
All information is subject to IRC’s own data and is considered accurate at time of going to print.
Wire and Film Technologies Division
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
A subsidiary of
TT electronics plc
MFP Series Issue October 2008 Sheet 1 of 3
Flameproof Power
Metal Film Resistor
Physical Data
d
D
L
f
Dimensions (mm) and Weight (g)
IRC
Type
MFP05
MFP1
MFP2
L max
3.5
6.2
10.0
D max
1.8
2.3
4.0
f min
22.4
21.0
19.0
d nom
0.5
0.6
0.8
PCB mounting
centers
7.6
10.2
18.4
Min. Bend
Radius
0.5
0.6
1.2
Wt. nom
0.1
0.3
0.55
Construction
The resistance element is a precisely controlled thin film
of metal alloy on a high purity ceramic core, protected
by a cement coating applied so that terminations remain
completely clear.
This permits a well defined body length, (clean lead to
clean lead dimension L).
Terminations
Material
Strength
Solderability
Solder-coated copper wire.
The terminations meet the
requirements of IEC 68.2.21
The terminations meet the
requirements of IEC 115-1,
Clause 4.17.3.2
Marking
MF Series resistors are color coded with 4 or 5 bands depending
on value and tolerance. IEC colors are used.
Solvent Resistance
The body protection and marking are resistant to all normal
industrial cleaning solvents suitable for printed circuits.
Flammability
The resistors coating will not burn or emit incandescent particles
under any condition of applied temperature or power overload.
Wire and Film Technologies Division
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
MFP Series Issue October 2008 Sheet 2 of 3
Flameproof Power
Metal Film Resistor
Application Notes
1. If the resistors are to dissipate full rate power, it
is recommended that the terminations should not be
soldered closer than 4mm from the body.
2. Due to operating temperature limitations imposed
by some pcb materials, derating may be necessary. An
estimate of the temperature rise to be expected can be
calculated using the thermal impedance figures given
under Electrical Data.
3. MFP resistors can also be supplied pre-formed,
contact factory for details.
Packaging
MFP resistors are normally supplied tape packed ready for loading
onto automatic sequencing and insertion machines.
The standard taping method and critical dimensions are shown
below. Component wires will not protrude beyond the outside edge
of the tapes. All taped resistors will be supplied either on reels
or in ammopacks, depending on quantities ordered. Pre-formed
resistors are supplied loose packed in plastic bags or boxes. This
product and packaging is denoted code F.
Type
Reel
Ammopack A
Code
R
A
MFP05
5000
5000
MFP1
5000
5000
MFP2
2500
2500
Ordering Data
Sample Part No.
IRC Type
MFP1
6802
J
R
(MFP1, MFP2)
Value
(100 ohms and greater - First 3 significant figures plus 4th digit multiplier)
Example: 100 ohms = 1000, 1000 ohms = 1001, 150,000 ohms = 1503
(Less than 100 ohms - ‘R’ is used to designate decimal)
Example: 51 ohms = 51R0, 1 ohm = 1R00, 0.25 ohm = R250
Tolerance
F = 1%, G = 2%, J = 5%
Packaging Details
R = Reel, A = Ammo
Wire and Film Technologies Division
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
MFP Series Issue October 2008 Sheet 3 of 3
