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Compact horizontal mount ceramic trimmer potentiometer JIERR JER805HM-301 with metal glaze resistive element

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Compact horizontal mount ceramic trimmer potentiometer JIERR JER805HM-301 with metal glaze resistive element

Voltage Rating : 30V

Tolerance : ±20%

Power(Watts) : 250mW

Resistance : 300Ω

Description : ±20% 250mW 300Ω Through Hole Trimmer Potentiometers RoHS

Mfr. Part # : JER805HM-301

Model Number : JER805HM-301

Package : Through Hole

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Product Overview

The JER805HM series ceramic trimmer potentiometer offers high stability, a compact size, and high precision. Designed with a metal glaze resistive element, these potentiometers feature a rated power of 0.5W and a wide resistance range from 300 to 2M. They are suitable for various applications requiring precise resistance adjustments.

Product Attributes

  • Brand: JER (implied by product series naming convention)
  • Series: JER805HM
  • Resistive Element Material: Metal glaze
  • Adjustment Type: Trimmer potentiometer
  • Mounting Style: Horizontal (implied by naming convention 'H')
  • Standard Packaging: 200 pcs/bag
  • Certifications: Meets JIS standards (indicated by 'B' for Japanese Standard)

Technical Specifications

Parameter Name Specification
Rated Power 0.5W
Resistance Range 300 - 2M
Resistance Tolerance 20%
Resistance Change Characteristic B (Linear)
Max. Operating Voltage 30VAC
Rotary Noise 100mV
Zero Resistance (R1K) r01, r03 10
Zero Resistance (R1K) r01, r03 < 1%R
Total Mechanical Travel 270 10
Effective Travel 240 10
Rotational Torque 3mNm ~ 30mNm
Stopping Strength 50mNm
Operating Temperature Range -30 ~ +85
Solder Heat Resistance (Terminal) 2% within 1 hour after immersion in solder bath at 26010 for 30.5 seconds.
Soldering Condition (Temperature) 26010
Soldering Condition (Time) Within 3 seconds (total time)
Temperature Coefficient Within 250PPM/

Nominal Resistance Code Table

Resistance () Resistance Code Resistance () Resistance Code
100 101 20000 (20K) 203
200 201 50000 (50K) 503
500 501 100000 (100K) 104
1000 (1K) 102 200000 (200K) 204
2000 (2K) 202 500000 (500K) 504
5000 (5K) 502 1000000 (1M) 105
10000 (10K) 103

Reliability Tests

Test Item Test Method Specification
Rotary Life Test Under no load, move wiper at 90% of effective angle at a speed of once every 6 seconds for 502 cycles. Resistance change within 10%.
Temperature Characteristic Under no load, place in a 703 oven for 5 hours. Resistance change within 3%.
Temperature Cycling 5 cycles of: No load -30 (30 min) Normal Temp/Humidity (15 min) 85 (30 min) Normal Temp/Humidity (15 min). After 5 cycles, place in normal temp/humidity for over 2 hours. Resistance change within 3%.
Long-term Heat Resistance Under no load, place in a 703 oven for 50010 hours. After placing in normal temp/humidity for over 2 hours. Resistance change within 5%.
Damp Heat Resistance Under no load, place in a 402, 90-95% humidity chamber for 50010 hours. After placing in normal temp/humidity for over 5 hours. Resistance change within 5%.
Load Life Test In a 402, 90-95% humidity chamber, apply rated voltage for 1.5 hours, then cut off for 0.5 hours. Repeat this cycle for 50010 hours. After placing in normal temp/humidity for over 5 hours. Resistance change within 5%.

Product Naming Convention

Component Description
JER Series Prefix
805 Model Number
H Mounting Style (Horizontal)
M Adjustment Type (Micro Adjustment)
101-105 Resistance Code

Precautions for Use

  • When performing dip soldering, ensure flux is fully dried to prevent quality degradation. Pay attention to the amount of flux applied.
  • Do not immerse the semi-adjustable resistor in solvents. Contact us if cleaning is necessary.
  • When inserting into a PCB or during assembly, avoid applying excessive force to the terminals, center terminal, or wiper to prevent deformation and poor contact. Exercise particular caution with the wiper in open-type models.
  • Store semi-adjustable resistors away from high/low temperatures, high humidity, and corrosive gases. Pay extra attention to long-term storage.
  • When storing, be mindful of the stacking pressure on the products.
  • Implement a First-In, First-Out (FIFO) system for inventory management.

2512081700_JIERR-JER805HM-301_C52033437.pdf


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