MA, MB, MC, MD Series
Alpha Electronics
Ultra Precision Resistor (Transfer Molded)
TCR, RESISTANCE RANGE, TOLERANCE,
RATED POWER
MA
Type
TCR (ppm/°C) Resistance
–55°C to
Range
+125°C*
(Ω)
0±15 (W)
0±5 (X)
MA
MC
0±5 (X)
0±2.5 (Y)
0±1 (Z)**
0±5 (X)
1 to 5
5 to 30
Resistance
Tolerance (%)*†
±0.5 (D) ±1 (F)
±0.1 (B) ±0.5 (D)
±1 (F)
±0.005 (V) ±0.01 (T)
±0.02 (Q) ±0.05 (A)
±0.1 (B) ±0.5 (D)
±1 (F)
±0.1 (B) ±0.5 (D)
±1 (F)
±0.005 (V) ±0.01 (T)
±0.02 (Q) ±0.05 (A)
±0.1 (B) ±0.5 (D)
±1 (F)
±0.1 (B) ±0.5 (D)
±1 (F)
±0.05 (A) ±0.1 (B)
±0.5 (D) ±1 (F)
±0.01 (T) ±0.02 (Q)
±0.05 (A) ±0.1 (B)
±0.5 (D) ±1 (F)
0.125
0.3
(0.2 at
150 kΩ or
above)
Rated
Power
(W)
at 125°C
30 to 200k
MB
MD
MC
5 to 30
MB
COMPOSITION OF TYPE NUMBER
MA Y 10K000 A
MD
0±5 (X)
0±2.5 (Y)
0±1 (Z)**
0±5 (X)
0±5 (X)
0±2.5 (Y)
0±5 (X)
0±2.5 (Y)
0±1 (Z)**
30 to 400k
0.5
(0.3 at
200 kΩ or
above)
5 to 30
30 to 100
100 to 80k
Resistance value, in ohm, is expressed by a series of six
characters, five of which represent significant digits. R or K
is a dual-purpose letter that designates both the value range
(R for ohmic; K for kilo-ohm) and the location of decimal point.
* Symbols in parentheses are for type number composition.
† Resistance figures are the values obtained by measuring the leads
at point 12.7±3.2 mm away from the base for Type MA and at point
5.0±1.0 mm for Types MC, MB and MD, but, in case of resistance below
10 ohm, the value at 1.6±0.6 mm away from the base for all types.
**Temperature characteristic Z is applicable for temperature range
between 0°C and 60°C.
CONFIGURATION
(DIMENSIONS IN mm)
POWER DERATING CURVE
(%)
Rated Power Percentage
200
150
100
50
70
25
50
75
100
125
150
175 ( C)
Ambient Temperature
Type
L
L1
W
W1
W2
T
F
ℓ
d
MA
7.9±0.2
1.0 max.
8.3±0.2
8.0±0.2
0.3 max.
2.8±0.2
3.81±0.25
25±10
MC
MB
13.0±0.3
1.5 max.
10.0±0.3
9.5±0.3
0.5 max.
4.0±0.3
7.5±0.5
10±3
MD
7.4±0.2
0.8 max.
6.0±0.2
5.7±0.2
0.4 max.
2.3±0.2
5.08±0.25
DSCC SPECIFICATIONS
97009
97010
97011
2.3±0.2
5.08±0.25
Dia. 0.65±0.05
www.alpha-elec.co.jp
16
For technical questions, contact
sales-alpha@alpha-elec.co.jp
Document No.: 67002
Revision: 29-Oct-2013
MA, MB, MC, MD Series
Alpha Electronics
Ultra Precision Resistor (Transfer Molded)
PERFORMANCE
Parameters
Maximum Rated Operating Temperature
Working Temperature Range
Maximum Working Voltage
Power Conditioning
Thermal Shock
Overload
Solderability
Resistance to Solvents
Low Temperature Storage
Low Temperature Operation
Terminal Strength
Dielectric Withstanding Voltage
Insulation Resistance
Resistance to Soldering Heat
Moisture Resistance
Shock (Specified Pulse)
Vibration, High Frequency
Life
Life 70°C Power Rating
Storage Life
High Temperature Exposure
Current Noise
Voltage Coefficient
Thermal EMF
Type MA meets requirements of MIL-PRF-55182/9.
125°C, Rated Power, 100 hrs.
–65°C/30 min.
↔
+150°C/30 min., 5 cycles
Rated Power x 6.25, 5 sec.
Steam Aging 8 hrs., 245°C, 5 sec.
➊
Isopropyl Alcohol + Mineral Spirits
➋
Water + Butyl Cellosolve + Monoethanolamine
–65°C, 24 hrs.
–65°C, Rated Voltage, 45 min.
0.908 kg (2 pounds), 10 sec
Atmo.Pres.: 300V rms. Baro. Pres. 8 mHg: 200V rms.
DC 100V, 2 min.
+260°C, 10 sec.
+65°C to –10°C, 90% RH to 98% RH, Rated Voltage,
10 cycles (240 hrs.)
100G, 6 ms, Sawtooth Wave, X, Y, each 10 shocks
20G, 10 Hz to 2,000 Hz to 10 Hz, 20min., X, Y, each 4 hrs.
125°C, Rated Voltage, 1.5 hr. – ON, 0.5 hr. – OFF, 2,000 hrs.
70°C, Rated Voltage x 2, 1.5 hr. – ON, 0.5 hr. – OFF, 2,000 hrs.
15°C to 35°C, 15% RH to 75% RH, No Load, 10,000 hrs.
175°C, No Load, 2,000 hrs.
Test Condition
MIL-PRF-55182/9
Specification
ALPHA Typical
Test Data
125°C
–65°C to +175°C
MA, MC=300V, MB=350V, MD=250V
±(0.20%+0.01Ω)
±0.05%
±0.05%
over 95% coverage
no damage
±0.05%
±0.05%
±0.02%
±0.02%
over 10,000 MΩ
±0.02%
±0.05%
±0.01%
±0.02%
±0.05%
±0.05%
±0.005%
±0.05%
-32 dB
0,0005%/V
1.0 µV/°C
±0.005%
±0.005%
±0.005%
over 95% coverage
no damage
±0.0025%
±0.0025%
±0.0025%
±0.0025%
over 10,000 MΩ
±0.0025%
±0.01%
±0.0025%
±0.0025%
±0.015%
±0.015%
±0.0025%
±0.015%
-42 dB
0,00003%/V
1.0 µV/°C
FREQUENCY CHARACTERISTICS
(%)
MA, MC
150
TEMPERATURE OF RESISTOR SURFACE
R(AC)/R(DC)
100
50
100
1k
50
1
10
Frequency
10 k
50 k
100
(MHz)
Document No.: 67002
Revision: 29-Oct-2013
For technical questions, contact
sales-alpha@alpha-elec.co.jp
www.alpha-elec.co.jp
17
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