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. A subsidiary of
TT electronics plc
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
Wire and Film Technologies Division
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
Flameproof Power
Metal Film Resistor
MFP Series
• Flameproof protection
• Small size for power rating
Electrical Data
IRC
Type
Power
Rating
@ 70°C
(watts)
Resistance
Range
(watts)
Limiting
Element
Voltage
(volts)
TCR
(ppm/°C)
Resistance
Tolerance*
(%)
Standard
Values
Thermal
Impedance
(°C/watt)
Ambient
Temperature
(°C)
MFP05 0.5 7R5 - 15R0
350
100
1, 2, 5 E24
preferred
150
-55 to 155
MFP1 <1 ohm: 0.7
>1 ohm: 1.0 0.1 - 1M
<1 ohm: 300
1 ohm-9.1 ohm: 200>10
ohm: 100
120
MFP2 2 1R0 - 1M 100 82
* Below 1 ohm 5% TOL preferred.
Environmental Data
Characteristic Maximum
Load: 1000 hours at 70°C 5
Shelf Life: 12 months at room temperature 2
Derating from rated power at 70°C zero at 155°C
Climatic 3
Climatic Category 50/155/56
Temperature rapid change 0.5
Resistance to solder heat 0.5
Voltage proof volts 500 min
∆R
∆R
∆R
∆R
∆R
∆R
∆R
MFP Series Issue October 2008 Sheet 1 of 3
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
Wire and Film Technologies Division
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
Physical Data
Flameproof Power
Metal Film Resistor
Lf
D
d
Dimensions (mm) and Weight (g)
IRC
Type L max D max f min d nom PCB mounting
centers
Min. Bend
Radius Wt. nom
MFP05 3.5 1.8 22.4 0.5 7.6 0.5 0.1
MFP1 6.2 2.3 21.0 0.6 10.2 0.6 0.3
MFP2 10.0 4.0 19.0 0.8 18.4 1.2 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 Solder-coated copper wire.
Strength The terminations meet the
requirements of IEC 68.2.21
Solderability 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.
MFP Series Issue October 2008 Sheet 2 of 3
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
Wire and Film Technologies Division
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
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 Code MFP05 MFP1 MFP2
Reel R 5000 5000 2500
Ammopack A A5000 5000 2500
Sample Part No.
IRC Type
(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
Ordering Data
MFP1 6802 J R
MFP Series Issue October 2008 Sheet 3 of 3
