Products Portfolio

Our portfolio comprises products in a variety of resistor and package configurations to meet the needs of a wide range of applications: discrete resistors and resistor networks in surface mount and through-hole (fixed-lead) configurations; customized chip resistor networks; precision trimming potentiometers; and discrete chips for use in hybrid circuits. Our foil resistors and current sensors are used in applications requiring a high degree of precision and stability, such as in medical testing equipment, high performance audio equipment, precision measuring instruments, aerospace, and military applications.

The resistance stability of Bulk MetalR Foil resistors against changes in temperature and over time makes them excellent metrological standard resistors. Without needing the oil baths that conventional standard resistors require, national standard institutes and local calibration laboratories in Japan use our standard resistors both for primary and secondary standards. Our standard resistors are available variety of models to fit a wide range of applications.


In addition Alpha Electronics has strong capabilities in production of custom products - tailored to your specific needs.
Do not hesitate contacting: sales-alpha@alpha-elec.co.jp

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Ultra Precision Resistors

Ultra Precision Resistors

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Standard Resistors Series

Standard Resistors Series

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Bulk Metal® Foil Resistors - Surface Mount (SMT)


Bulk Metal® Foil Resistors - Through-hole


Thin Film Resistors


Thermosensitive Resistors and Temperature Sensors


Custom Products


Standard Resistors


Bulk Metal® Foil Resistors - Surface Mount (SMT)

Products Appearance Brief Specification PDF
NEW RWA, RWB, RWC
Precision SMD Bulk Metal Foil Resistor
(Wraparound Terminal)
Rated Power:
0.1W, 0.2W, 0,3W @70℃

Resistance Range:
5Ω - 30kΩ

Resistance Tolerance:
0.01%, ±0.02%, ±0.05%, ±0.1%

TCR:
±2ppm/°C
PDF 
MPP, MQP Series
Z Foil Ultra-Precision SMT Resistor
(Molded, J-Lead Terminal)
Rated Power:
0.2W, 0.25W @70°C/0.1W, 0.125W @125°C

Resistance Range:
30Ω - 40kΩ

Resistance Tolerance:
0.01%, ±0.02%, ±0.05%, ±0.1%

TCR:
±0.2ppm±1.8ppm/°C
PDF 
MP, MQ Series
Ultra-Precision SMT Resistor (Molded, J-Lead Terminal)
Rated Power:
0.1W, 0.125W 

Resistance Range:
30Ω - 60kΩ

Resistance Tolerance:
±0.05%, ±0.1% 

TCR :
0±5ppm/°C
PDF 
EP, EQ Series
Ultra-Precision SMT Resistor
(Wire-Bondable)
Rated Power:
0.1W, 0.125W 

Resistance Range:
30Ω - 60kΩ

Resistance Tolerance:
±0.05%, ±0.1% 

TCR :
0±5ppm/°C
  
MU Series
Ultra Precision SMT Resistor
1-2-3Network
(Molded, J-Lead Terminal)
Rated Power:
0.05W/Element

Resistance Range:
10Ω - 20kΩ

Resistance Tolerance:
±0.02% - ±0.5% (Absolute)
±0.01% - ±0.5% (Matching)

TCR :
0±5ppm/°C(Absolute)
±1ppm/°C(Tracking)
PDF 
RBD, RBF, RBH Series
Ultra Precision SMT Current Sense Resistor(Flip-Chip)
Rated Power:
0.5W,1W, 1.5W

Resistance Range:
0.01Ω - 1Ω

Resistance Tolerance:
±0.5% - ±5% 

TCR :
0±10ppm/°C,0±25ppm/°C,0±50ppm/°C
PDF 
SMR1DZ, SMR3DZ Series
Ultra High Precision Ultra-Precision Resistor
Z Foil Molded Surface Mount Resistor
Rated Power:
0.25W, 0.6W 

Resistance Range:
5Ω - 80kΩ

Resistance Tolerance:
Up to ±0.01%

TCR :
0.05ppm/°C typical (0°C - +60°C)
0.2ppm/°C typical (-55°C - +125°C)
PDF 
CSM Series
High Precision, Current Sensing, Power Surface Mount, Metal Strip Resistor
Rated Power:
1W, 3W 

Resistance Range:
1mΩ - 200mΩ

Resistance Tolerance:
±0.1% 

TCR :
10ppm/°C, (-55°C - +125°C +25ref.)
15ppm/°C, (-55°C - +125°C +25ref.)
PDF 

Bulk Metal® Foil Resistors - Through-hole

Products Appearance Brief Specification PDF
MA, MB, MC, MD Series
Ultra-Precision Resistor
(Transfer Molded)
Rated Power:
0.25W, 0.6W, 1.0W @70°C/0.125W, 0.3W, 0.5W@125°C

Resistance Range:
1Ω - 400kΩ

Resistance Tolerance:
±0.005% - ±1.0%

TCR :
0±1ppm/°C, 0±2.5ppm/°C
0±5ppm/°C, 0±15ppm/°C
PDF 
FLA, FLB, FLC Series
Precision Resistor
(Conformally Coated)
Rated Power:
0.125W - 0.25W 

Resistance Range:
10Ω - 200kΩ

Resistance Tolerance:
±0.01% - ±0.1% 

TCR :
0±2.5ppm/°C, 0±5ppm/°C
PDF 
SLD, SM Series
Ultra-Precision Resistor
1-2-3 Network
Rated Power:
0.25W, 0.3W 

Resistance Range:
50Ω - 30Ω

Resistance Tolerance:
0±0.02% - ±0.1% (Absolute)
±0.01% - ±0.1% (Tracking)

TCR :
0±2.5ppm/°C, 0±5ppm/°C (Absolute)
±0.5ppm/°C (Tracking)
PDF 
PSB Series
Ultra Precision Shunt Resistor
(40 Watts)
Rated Power:
12W ( 40W with Heat Sink) 

Resistance Range:
0.001Ω - 1Ω

Resistance Tolerance:
±0.1%, ±0.5%, ±1.0%

TCR :
0±5ppm/°C, 0±15ppm/°C
PDF 
PB, PC Series
Ultra Precision Shunt Resistor
(10 Watts)
Rated Power:
2W ( 10W with Heat Sink) 

Resistance Range:
0.002Ω - 50kΩ

Resistance Tolerance:
±0.01% - ±5.0% 

TCR :
0±2.5ppm/°C, 0±5ppm/°C, 0±15ppm/°C
PDF 
PD Series
Ultra Precision Shunt Resistor
(8 Watts, TO-220)
Rated Power:
1.5W (8W with Heat Sink) 

Resistance Range:
0.1Ω - 10kΩ

Resistance Tolerance:
±0.02% - ±5% 

TCR :
0±2.5ppm/°C, 0±5ppm/°C, 0±15ppm/°C
PDF 
PE Series
Ultra Precision Shunt Resistor
(10 Watts, TO Package)
Rated Power:
1.5W (10W with Heat Sink)

Resistance Range:
0.5Ω - 500Ω

Resistance Tolerance:
±0.01% - ±5%

TCR :
0±2.5ppm/°C, 0±5ppm/°C, 0±15ppm/°C
PDF 
HC, HD, HG Series
Ultra Precision Resistor
(Hermetically Sealed)
Rated Power:
0.3W

Resistance Range:
1Ω - 120kΩ

Resistance Tolerance:
±0.005% - ±1.0%

TCR :
0±1ppm/°C, 0±2.5ppm/°C
0±5ppm/°C, 0±15ppm/°C
PDF 
HK, HL Series
Zero-TCR Ultra Precision Resistor
(Hermetically Sealed)
Rated Power:
0.3W

Resistance Range:
100Ω - 100kΩ

Resistance Tolerance:
±0.005% - ±1.0%

TCR :
S characteristics
PDF 
Ultra Precision Resistor Network
  PDF 
SC Series
Ultra Precision Resistor Network
(Case-Encapsulated)
Rated Power:
0.5 - 1W

Resistance Range:
30Ω - 120kΩ (Max. 1200kΩ/Package)

Resistance Tolerance:
±0.01% - ±1.0% (Absolute)
±0.01% - ±1.0% (Matching)

TCR :
0±1ppm/°C (Absolute)
±1ppm/°C (Tracking)
PDF 
SE, SF, SS Series
Precision Resistor Network
(Conformally Coated)
Rated Power:
0.1W, 0.5W

Resistance Range:
30Ω - 120kΩ

Resistance Tolerance:
+/-0.05%, +/-0.1% (Absolute)
+/-0.01%, +/-1.0% (Matching)

TCR :
0+/-5ppm/°C(Absolute)
0+/-1ppm/°C - 0+/-3ppm/°C(Matching)
PDF 
VFP-3, VFP-4 Series
High Precision
Power and Current Sensing
Resistors
Rated Power:
Up to 10W

Resistance Range:
0.1Ω - 80kΩ

Resistance Tolerance:
Up to ±0.01%

TCR :
2ppm/°C typical (-55°C - +125°C +25ref.)
PDF 
FNP Series
500W High Power Precision Shunt Resistor

High Precision
Shunt Resistor
Up to 500W
Rated Power:
Up to 500W

Resistance Range:
1mΩ - 1Ω

Resistance Tolerance:
Up to ±0.05%

TCR :
1ppm/°C (+25°C - +60°C +25°C ref.)
5ppm/°C (-25°C - +125°C +25°C ref.)
PDF 

Thin Film Resistors

Products Appearance Brief Specification PDF
TLA, TLC Series
Precision Thin Film Resistor
(Conformally Coated)
Rated Power:
0.125W, 0.25W 

Resistance Range:
100kΩ - 10MΩ

Resistance Tolerance:
±0.02% - ±1.0%

TCR :
0±5ppm/°C, 0±10ppm/°C
PDF 
TCB Series
Precision Thin Film Resistor
(Ceramic Case)
Rated Power:
0.125W, 0.25W 

Resistance Range:
100kΩ - 1MΩ

Resistance Tolerance:
±0.02% - ±1.0%

TCR :
0±5ppm/°C, 0±10ppm/°C
  

Thermosensitive Resistors and Temperature Sensors

Products Appearance Brief Specification PDF
CLA, CLB,KLC, NLA, NLB, NMP, NMQ Series
Rated Power:
0.1W, 0.125W, 0.25W

Resistance Range:
5Ω - 40kΩ

Resistance Tolerance:
±0.5% - ±5%

TCR :
+4250ppm/°C - +6590ppm/°C
PDF 
PTA Series
Ultra Precision Pt Sensor
(Conformally Coated)
 Resistance:
100Ω, 1000Ω

Class:
A:±(0.15+0.002|t|), B:±(0.3+0.005|t|)

TCR :
3850ppm/°C±20ppm/°C
  

Custom Products

Products Appearance Brief Specification PDF
Custom Products
 See datasheet for details.PDF 

Standard Resistors

Products Appearance Brief Specification PDF
USR-SF Series
Stress Free Ultra-Stable Primary Standard Resistor
Nominal R. Value:
1Ω, 10Ω, 100Ω, 1kΩ, 10kΩ

Accuracy :
±2ppm 

TCR :
±0.05ppm/°C 

Stability :
±0.2ppm/Year (typical)
±0.5ppm/Year
PDF 
ASR Series
Primary Standard Resistor
Nominal R. Value:
1Ω, 10Ω, 100Ω, 1kΩ, 10kΩ, 100kΩ, 1MΩ, 10MΩ

Accuracy :
±5ppm (10MΩ±10ppm) 

TCR:
±0.2ppm/°C (10MΩ:±0.5ppm/°C)

Stability :
±3ppm/Year (10MΩ:±6ppm/Year)
PDF 
CSR Series
Working Standard Resistor
Nominal R. Value:
1mΩ, 10mΩ, 100mΩ, 100kΩ, 1MΩ, 10MΩ, 100MΩ

Accuracy :
±10ppm - ±200ppm

TCR:
±1ppm/°C - ±10ppm/°C

Stability :
±10ppm/Year - ±25ppm/Year
PDF 
LSR Series
High Power Standard Resistor
Nominal R. Value:
1mΩ, 10mΩ, 10mΩ

Accuracy :
±25ppm - ±100ppm 

TCR:
±2.5ppm/°C 

Stability :
±10ppm/Year
PDF 
MSR Series
Milliohm Meter Calibration Resistor
Nominal R. Value:
1mΩ, 10mΩ, 100mΩ

Accuracy :
±200ppm - ±500ppm 

TCR:
±5ppm/°C - ±15ppm/°C 

Stability :
±25ppm/Year
PDF 
ATV Series
I/V Converter
Rated Power:
0.1W (1Ω:0.25W) 

Nominal R. Value:
1Ω, 10Ω, 100Ω, 1kΩ, 10kΩ, 100kΩ

Accuracy :
±0.1% 

TCR :
±2.5ppm/°C
PDF 
ADR Series
Precision Programmable Resistance Box
RTD Simulator
Max. Power:
0.5W 

Resistance Range:
5Ω - 199.9999kΩ

Resolution:
0.001Ω - 0.1Ω

Accuracy:
±(0.01% + 2mΩ)
PDF 
ADR Series 6Dial
6 Dial Decade Resistance Box
RTD Simulator
Max. Power:
0.5W 

Resistance Range:
0.100Ω - 199.9999kΩ

Resolution:
0.001Ω - 10Ω

Accuracy:
±(0.005% + 2mΩ)
PDF 
ADR-1000 Series
1 Dial Resistance Box
RTD Simulator
Resistance Range:
1Ω - 1MΩ

Resistance Tolerance:
±0.02%, ±0.05%, ±0.1% 

TCR :
0±2.5ppm/°C, 0±5ppm/°C 

NO.of Contact(Max):
24 Points
PDF 
ATS Series
Resistor Transfer Standard
Resistance:
1Ω - 100Ω, 10Ω - 1kΩ

Range:
100Ω - 10kΩ, 1kΩ - 100kΩ
10kΩ - 1MΩ, 100kΩ - 10MΩ,
1MΩ - 100MΩ

Accuracy :
±10ppm - ±50ppm(Absolute) 
±5ppm - (Matching) 

TCR:
±1ppm/°C - ±10ppm/°C(Absolute) 
±1ppm/°C - (Matching)
PDF 
Custom Products Standard Resistors
Custom Products Group to meet with various requirements from customers.
See datasheet for details.
PDF 
Traceability Chart
 See datasheet for details.PDF 
Calibration/Options
 See datasheet for details.PDF