Alpha HC Series

  • Alpha Electronics

Product Features

  • Ultra-precision hermetically sealed resistor
  • Resistance range form 1Ω to 120kΩ
  • Tolerance from ±0.005% to ±1%
  • TCR from ±1 ppm/°C to ±15 ppm/°C
  • Power rating of 0.3W (at 125°C)
  • Temperature range from -65°C up to +150°C

Applications

  • Power Control
  • Compliant

Description

The HC Ultra-precision through-hole resistor series from Alpha Electronics offers their extremely precise resistor capabilities in a hermetically sealed package. With a resistance range from 1Ω up to 120kΩ all in a small through-hole package with a pin pitch of 3.81mm ±0.25mm. By utilising Alpha’s Bulk Metal® foil resistor technology, they are able to produce resistors with low-temperature coefficients and excellent long-term stability. The Alpha Electronics HC series have been designed with longer leads to ensure the correct clearance from the PCB is achieved when soldering. It is advised that the resistors are kept over 10mm away from the board surface by using an insulating tube.

  • Ultra-precision hermetically sealed resistor
  • Through-hole package with a pin pitch of 3.81mm ±0.25mm
  • Resistance values between 1Ω and 120kΩ
  • Tolerance options as low as ±0.005%
  • TCR between ±1 ppm/°C and ±15 ppm/°C (dependant on resistance values and temperature)
  • Temperature range from -65°C up to +150°C
  • Maximum working voltage of 300V
  • Power rating of 0.3W (at +125°C)

 

Typical applications for the HC Ultra-precision through-hole resistor series include:

  • Sceintific instrumentation
  • Test & Measurement equipment
  • Oil & Gas Applications

 

Alpha Electronics HC Series Specification Table

AttributesValue
Resistance value1Ω to 120kΩ
Tolerance±0.005% to ±1%
TCR±1ppm/°C to ±15ppm/°C
Temperature range-65°C to +150°C
Power rating (at 125°C)0.3W
Maximum voltage300V

Alpha Electronics are manufacturers of some of the most stable and precise resistors on the market. As part of the VPG Foil Resistors product group, the Alpha Electronics brand is globally rewarded for the accuracy and reliability of its Bulk Metal® Foil technology resistors. Alpha Electronics has been living the conviction globally known to engineers for consistently delivering the highly desirable characteristics of “Stability, Accuracy and Reliability”. Please visit https://www.alpha-elec.co.jp for more information.

Specifications

Dimensions 10.70 × 4.30 × 10.70 mm
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Alpha HC Series Resources

Product Datasheet

Supporting Product Information

Supporting Manufacturer Information

Alpha Resistor Videos

We are pleased to provide you with a range of videos, please see below for the latest content available:

 

 

VIDEOS
Place holder video for YouTube video Resistor Stability Put to the Test (Demo Video)

In this video, our host Richard Zuratt puts the stability of the three major resistor technologies — foil, thin, and thick film — to the test. Each resistor type is subjected to an overload pulse and its change in resistance value is recorded. Due to the homogeneous nature of the VPG Bulk Metal® Foil resistor, it is the only of the three to experience no change from the high power pulse. This demonstrated performance makes foil resistors the technology of choice for critical applications where long-term stability and survivability are paramount.

Place holder video for YouTube video Advantages of Using Bulk Metal® Foil Resistors in High-Humidity Environments

All resistors that are based on nichrome, which is a category that includes both thin film devices and Bulk Metal Foil resistors, are susceptible to electro-chemical corrosion or etching when placed in a high humidity environment and powered with a very low wattage. But since the nichrome element of a Bulk Metal Foil resistor is hundreds of times thicker than the element in a thin film device with the same value, it will last much longer under these conditions. This video shows the actual etching process and survival times for thin film and foil nichrome resistive elements as they are tested in 100% humidity conditions.

Place holder video for YouTube video Comparison Testing of Chip Resistor Technologies Under High Vibration

Surface-mount resistors suffer physical stresses when exposed to high vibration or thermally unstable environments. Failure modes commonly occur in welds, solder joints, connectors, and terminations, ultimately resulting in circuit failure. In this demonstration, vibration-table-mounted boards are subjected to ±2° deflection 25 times per second and monitored for any ΔR > 0.1%. All the chip resistors failed in 2 to 12 minutes (8K to 16K cycles). But the Alpha MPP molded Bulk Metal® Z-Foil resistor with flexible terminations experienced over a million cycles with no change in resistance.

VIDEOS
Place holder video for YouTube video
Resistor Stability Put to the Test (Demo Video

In this video, our host Richard Zuratt puts the stability of the three major resistor technologies — foil, thin, and thick film — to the test. Each resistor type is subjected to an overload pulse and its change in resistance value is recorded. Due to the homogeneous nature of the VPG Bulk Metal® Foil resistor, it is the only of the three to experience no change from the high power pulse. This demonstrated performance makes foil resistors the technology of choice for critical applications where long-term stability and survivability are paramount.

Place holder video for YouTube video
Advantages of Using Bulk Metal® Foil Resistors in High-Humidity Environments

All resistors that are based on nichrome, which is a category that includes both thin film devices and Bulk Metal Foil resistors, are susceptible to electro-chemical corrosion or etching when placed in a high humidity environment and powered with a very low wattage. But since the nichrome element of a Bulk Metal Foil resistor is hundreds of times thicker than the element in a thin film device with the same value, it will last much longer under these conditions. This video shows the actual etching process and survival times for thin film and foil nichrome resistive elements as they are tested in 100% humidity conditions.

Place holder video for YouTube video

Surface-mount resistors suffer physical stresses when exposed to high vibration or thermally unstable environments. Failure modes commonly occur in welds, solder joints, connectors, and terminations, ultimately resulting in circuit failure. In this demonstration, vibration-table-mounted boards are subjected to ±2° deflection 25 times per second and monitored for any ΔR > 0.1%. All the chip resistors failed in 2 to 12 minutes (8K to 16K cycles). But the Alpha MPP molded Bulk Metal® Z-Foil resistor with flexible terminations experienced over a million cycles with no change in resistance.

Alpha HC Series Ordering Info

The HC resistor series is available with various options including standard resistance values and tolerances. The information below gives an example of the part numbering system used for these resistors and the standard options available.

Below is an example of the part number break down for the HC resistor series:

alpha_hc_order_code

Alpha HC Series

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