1
ISO-9001
Registered
CYLINDRICAL GENERAL PURPOSE
SURFACE MOUNT POWER RESISTOR
METAL GLAZE™
MM SERIES
· Up to 2 watts
· 0.1 ohm to 2.2 megohm range
· Up to 1000 volts
· 150°C maximum operating temperature
WIREWOUND AND FILM TECHNOLOGIES DIVISION
736 Greenway Road • Boone, Nor th Carolina 28607-1860 • Tel: 828-264-8861 • Fax: 828-264-8866 • www.irctt.com
MM SPECIFICATIONS:
IRC
Type
MMA0204
MMB0207
MMC0310
Size
Code
B
F
H
Maximum
Power Rating
1/4W @ 70°C
1W @ 70°C
2W @ 25°C
1.33W @ 70°C
Maximum
Voltage
400
700
1000
Working
Voltage1
200
350
500
Resistance
Range (ohms)2
0.1 to 0.99
1.0 to 1.0 M
0.1 to 0.99
1.0 to 2.21M
0.2 to 0.99
1.0 to 2.21M
Tolerance
(±%)2
1
1
1
1
1
1
TCR
(ppm/°C)2
100
50
100
50
100
50
Product
Category
Low Range
Standard
Low Range
Standard
Low Range
Standard
1Not to e xceed 2Consult factory for tighter TCR, tolerance, or resistance values. E96 standard EIA Decade Values pref erred. E196 and E24 Decade Values available .PxR
MM PERFORMANCE CHARA CTERISTICS:
Characteristics
Temperature Coefficient
Ther mal Shock
Low Temperature Operation
Short Time Overload
High Temperature Exposure
Resistance to Bonding Exposure
Solderability
Moisture Resistance
Lif e Test
Terminal Adhesion Strength
Resistance to Board Bending
Maximum Change
As specified
±0.5% +0.01 ohm
±0.25% +0.01 ohm
±1% +0.01 ohm
±0.5% +0.01 ohm
±0.25% 0.01 ohm
95% minimum cove rage
±0.5% +0.01 ohm
1% +0.01 ohm
±1% +0.01 ohm
no mechanical damage
±1% + 0.01 ohm
no mechanical damage
Test Method
MIL-R-55342E P ar 4.7.9 (-55°C +125°C)
MIL-R-55342E Par 4.7.3 (-65°C +150°C, 5 cycles)
MIL-R-55342E Par 4.7.4 (-65°C @ wor king voltage)
MIL-R-55342E Par 4.7.5 (2.5 x for 5 seconds)
MIL-R-55342E Par 4.7.6 (+150°C for 100 hours)
MIL-R-55342E P ar 4.7.7 (Reflo w soldered to board at 260°C f or 10 seconds)
MIL-STD-202, Method 208 (245°C for 5 seconds)
MIL-R-55342E Par 4.7.8 (10 cycles, total 240 hours)
MIL-R-55342E Par 4.7.10 (2000 hour at 70°C intermittent)
1200 gram push from underside of mounted chip for 60 seconds
Chip mounted in center of 90mm long board, deflected 5mm so as to
exer t pull on chip contacts for 10 seconds
PxR
Note: Use for repetitiv e pulses where the aver age power dissipation is not
to exceed the component rating at 70°C . Surge handling capacity f or low-
repetitive surges ma y be significantly greater than sho wn abo ve . Contact
factory for recommendations.
Peak Power (watts)
MM REPETITIVE SURGE CURVE:
.1msec 1msec 10msec 100msec 10000msec
Surge or Pulse duration (seconds)
MM POWER DERATING CUR VE:
30 40 50 60 70 80 90 100 110 120 130 140 150
0%
20%
40%
60%
80%
100%
120%
CHP 1/8, 1/2, 1
CHP 2
Percent Relative Power
Ambient Temperature (°C)
MMA0204, MMB0207
MMC0310
1000
100
10
1
MMC0310
MMB0207
MMA0204
Metal GlazeTM thick film
element fired at 1000°C
to solid ceramic substrate
High temperature
dielectric coating
60/40 Solder over nickel barrier
0.0001 0.0010 0.0100 0.1000 1.0000