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Ohmite RJS300E Wirewound Rheostat

The OHMITE RJS300E is a wirewound rheostat, a type of variable resistor used for precise control in industrial applications. These rheostats are electro-mechanical devices, subject to mechanical wear and therefore have a finite life. They are available in various configurations with different wattage ratings, core types (open or enclosed), and shaft rotation options. Refer to catalog #203 for detailed specifications and ordering information.

Authorized Distributors
Source:DigiKey
Part No:RJS300E
Stock:47
Inv Date:06-01-2026
Price: Unit price: $306.38
Buy/RFQ:
Part No:RJS300E
Stock:3
Inv Date:06-02-2026
Price: Unit price: $278.38
Buy/RFQ:
Part No:RJS300E
Stock:45
Inv Date:06-01-2026
Price: Unit price: $277.71
Buy/RFQ:
Part No:RJS300E
Stock:10
Inv Date:06-01-2026
Price: Unit price: $204.12
Buy/RFQ:
Part No:RJS300E
Stock:10
Inv Date:06-01-2026
Price: Unit price: $204.12
Buy/RFQ:

Ohmite RJS300E Wirewound Rheostat Specifications:

  • ohmic_voltage: 10.0-5K
  • watts_range: 7.5
  • core: enclosed
  • diameter_d_in_mm_ref: 0.875/22.23
  • dimension_c_in_mm_ref: 0.515/13.08
  • shaft_rotation: —
  • torque_lb_in: 0.25-3
  • max_temp: 300°
  • model_type: RCS/RCL
  • shaft_rotation_model_e: 0.594/15.08
  • core_model_e: open
  • diameter_d_in_mm_ref_model_e: 0.688/17.46
  • dimension_c_in_mm_ref_model_e: 0.875/22.23
  • torque_lb_in_model_e: 1-6
  • model_type_model_e: RES/REL
  • wattage_model_e: 12.5
  • shaft_locking: 0.531
  • mounting_panels: 0.125
  • thickness: 3.18mm
  • screw_size: [1] /4-32
  • nut_thickness: [1] /16
  • standard_shaft: 0.25
  • locking_shaft: 0.625
  • drill_hole_size: 0.188
  • ohm_voltage_model_h: 1.0-25K
  • wattage_model_h: 25
  • core_model_h: open
  • diameter_d_in_mm_ref_model_h: 34.93
  • dimension_c_in_mm_ref_model_h: 39.62
  • torque_lb_in_model_h: 0.25-0.5
  • ohm_voltage_model_j: 0.5-50K
  • wattage_model_j: 50
  • core_model_j: open
  • ohm_voltage_model_g: 0.5-50K
  • wattage_model_g: 75
  • core_model_g: open
  • ohm_voltage_model_k: 0.5-50K
  • wattage_model_k: 100
  • core_model_k: open
  • ohm_voltage_model_l: 0.5-50K
  • wattage_model_l: 150
  • core_model_l: open
  • ohm_voltage_model_n: 1.0-50K
  • wattage_model_n: 300
  • core_model_n: open
  • ohm_voltage_model_p: 1.0-30K
  • wattage_model_p: 225
  • core_model_p: open
  • ohm_voltage_model_r: 1.0-20K
  • wattage_model_r: 500
  • core_model_r: open
  • ohm_voltage_model_u: 1.0-20K
  • wattage_model_u: 1000
  • core_model_u: open

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Frequently Asked Questions

Where can I buy Ohmite RJS300E?

You can click on the BUY or RFQ button to purchase RJS300E from an authorized Ohmite distributor.

How do I troubleshoot issues or seek technical support for part RJS300E?

You can download the RJS300E datasheet or visit the Ohmite website for support.

Who is the manufacturer of RJS300E?

Ohmite

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