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
2
ISO-9001
Registered
MM FAMILY STANDARD SIZES, SOLDER PADS AND PA CKAGING:
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
RECOMMENDED SOLDER PAD DIMENSIONS (REFLOW):
To ensure excellent solder ability performance, IRC recommends the following pad design. This design will provide a large repeatable
solder fillet to the MM resistor on reflow processes and will provide maximum heat transfer to the PC board in high power applications.
By placing the MM on the solder paste while the paste is in the "tacky" state, the MM will be held in position until solder reflow begins.
The pad design then uses the surface tension of the molten solder to pull the component to the center of the solder pad. The
placement of a via rising above the board level directly beneath the MM is not recommended.
DIMENSIONS (mm and (inches)):
Size Code
B
F
H
Actual Size
W
1.45±0.15
(0.057±0.006)
2.01±0.15
(0.079±0.006)
2.67±0.15
(0.105±0.006)
C*
0.51+0.50/-0.38
(0.020+0.020/-0.015)
1.02±0.50
(0.040±0.020)
1.27±0.50
(0.050±0.020)
W
L
C
*C dimension is average termination width.
Size
Code
B
F
H
Dimensions (mm and (inches))
A
1.93
(0.076)
3.07
(0.121)
4.32
(0.170)
B
2.36
(0.093)
3.20
(0.126)
4.06
(0.160)
C
1.47
(0.058)
3.23
(0.127)
5.41
(0.213)
D
2.49
(0.098)
4.65
(0.183)
6.93
(0.273)
F
5.36
(0.211)
9.37
(0.369)
14.05
(0.553)
E
0.81
(0.032)
1.02
(0.040)
1.12
(0.044)
F
CAA
D
E
B
STANDARD REEL PACKAGING PER EIA-481:
Size Code
B
F
H
* The 13" reel is considered standard and will be supplied unless otherwise specified.
HOW TO ORDER:
Sample Par t No.
IRC T ype
(MMA0204, MMB0207, MMC0310)
Temperature Coefficient
(50 or 100)
Resistance V alue
(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 = 1.0%)
Packaging Code*
(BLK = Bulk, 7=7" Reel, 13=13" Reel)
MMA0204 - 50 - 2203 - F - 13
L
3.25±0.18
(0.128±0.007)
6.38±0.25
(0.251±0.010)
9.32±0.25
(0.367±0.010)
Quantity Per Reel
2,500 max.
10,000 max.
1,500 max.
5,000 max.
1,500 max.
Reel Diameter*
7"
13"
7"
13"
13"
Carrier Tape Width
8mm
12mm
24mm
Component Pitch
4mm
4mm
4mm
