HS250 120R F Equivalent & Substitute Parts

Part Overview

The HS250 120R F is a 250W wirewound chassis mount resistor manufactured by Ohmite, rated at 120 Ohms with ±1% tolerance. This component is designed for high-power applications requiring stable resistance performance in aluminum-housed configurations with flanged mounting. The part is currently active in production and RoHS compliant. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility can be maintained within the allowed parameter ranges for this resistor category.

Substiute Parts

HS250 120R F

OhmiteIn Stock: 1148HS250 120R F Datasheet

Current PartRFQ

HS200 120R F

ARCOLIn Stock: 890HS200 120R F Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the HS250 120R F is determined by the following critical parameters:

• Resistance value: 120 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Composition: Wirewound (exact match required)
• Housing type: Aluminum (exact match required)
• Mounting feature: Flanges with M6 threaded leads (exact match required)
• RoHS compliance: Required for regulatory equivalence

The HS200 120R F qualifies as a parametric equivalent based on matching resistance, tolerance, composition, housing, and mounting specifications. Power rating variance (200W vs. 250W) represents a derating condition and must be evaluated against application requirements.

Parameter Comparison

Engineering Selection Recommendations

Both the HS250 120R F and HS200 120R F are active production components with RoHS compliance certification. Selection between these parts must be based on application power dissipation requirements. The HS250 120R F provides 250W continuous power handling capability, while the HS200 120R F is rated for 200W. The HS200 120R F exhibits reduced physical footprint (length and width dimensions) while maintaining identical seated height and M6 threaded lead compatibility. Component selection should verify that application thermal and electrical load conditions do not exceed the power rating of the selected substitute.

Frequently Asked Questions (FAQ)

Q: Can the HS200 120R F directly replace the HS250 120R F in all applications?

A: Direct replacement is limited to applications where power dissipation does not exceed 200W. The HS200 120R F is electrically equivalent (120 Ohms ±1%, wirewound, aluminum housing, M6 threaded flanged mount) but has a lower power rating. Applications requiring the full 250W capability must use the HS250 120R F.

Q: Are the physical dimensions compatible between these parts?

A: Seated height is identical at 1.646" (41.80mm) for both parts. The HS200 120R F has smaller length and width dimensions (4.631" x 1.791" vs. 4.319" x 2.854"). M6 threaded lead spacing and flange mounting are compatible. Verify PCB or chassis layout accommodates the smaller footprint of the HS200 120R F.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the HS250 120R F and HS200 120R F are RoHS compliant with MSL rating of 1 (Unlimited) and ECCN classification EAR99.

Q: What is the difference in temperature coefficient between these parts?

A: The HS250 120R F specifies 100ppm/°C, while the HS200 120R F specifies ±100ppm/°C. Both values fall within the same operational range for temperature stability in wirewound resistor applications.

Q: Are packaging options different between these parts?

A: The HS250 120R F is supplied in Box packaging, while the HS200 120R F is supplied in Bulk packaging. Verify packaging requirements for your procurement and assembly processes.