HS50 R56 J Equivalent & Substitute Parts

Part Overview

The HS50 R56 J is a 50-watt wirewound chassis mount resistor manufactured by Ohmite, rated at 560 mOhms with ±5% tolerance. This component is designed for high-power applications requiring reliable pulse withstanding capability and thermal stability. The part maintains Active product status with full RoHS compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts become necessary when application constraints require reduced power dissipation, space optimization, or inventory availability considerations while maintaining core electrical and mechanical compatibility.

Substiute Parts

HS50 R56 J

OhmiteIn Stock: 1220HS50 R56 J Datasheet

Current PartRFQ

HS25 R56 J

OhmiteIn Stock: 811HS25 R56 J Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The HS25 R56 J qualifies as a parametric equivalent based on the following matching criteria:

Matched Parameters (Substitution Basis):

• Resistance value: 560 mOhms (identical)
• Tolerance: ±5% (identical)
• Composition: Wirewound (identical)
• Temperature Coefficient: ±100 ppm/°C (equivalent)
• Housing Type: Aluminum (identical)
• Mounting Feature: Flanges (identical)
• Lead Style: Solder Lugs (identical)
• Compliance: RoHS3 Compliant (meets or exceeds RoHS requirements)

Differing Parameter:

• Power Rating: 25W (reduced from 50W)

The HS25 R56 J maintains electrical and mechanical compatibility with identical resistance, tolerance, construction method, and mounting interface. The reduced power rating (25W vs. 50W) defines the substitution scope: this part is suitable only for applications where the thermal load does not exceed 25 watts.

Parameter Comparison

Engineering Selection Recommendations

HS50 R56 J Selection Criteria:

• Applications requiring continuous power dissipation up to 50 watts
• Designs with thermal margin requirements or peak pulse loading
• Systems where component footprint is not constrained
• Active product status with full RoHS compliance and unlimited moisture sensitivity rating

HS25 R56 J Selection Criteria:

• Applications with maximum continuous power dissipation of 25 watts or less
• Space-constrained designs benefiting from reduced physical dimensions (approximately 44% smaller footprint)
• Inventory availability or cost optimization scenarios
• ROHS3 compliance requirement satisfaction
• Designs where thermal management allows lower power rating

Both parts maintain Active product status and meet regulatory compliance requirements. Selection between these parts depends solely on application power requirements and physical space constraints.

Frequently Asked Questions (FAQ)

Q: Can HS25 R56 J replace HS50 R56 J in any application?

A: The HS25 R56 J is electrically and mechanically compatible only in applications where continuous power dissipation does not exceed 25 watts. The identical resistance (560 mOhms), tolerance (±5%), and mounting interface (flanges with solder lugs) ensure functional compatibility within this thermal constraint.

Q: What is the primary difference between these parts?

A: The power rating differs: HS50 R56 J is rated for 50 watts, while HS25 R56 J is rated for 25 watts. All other electrical parameters (resistance, tolerance, temperature coefficient) and mechanical features (housing, mounting, lead style) are identical or equivalent.

Q: Are there physical dimension differences?

A: Yes. The HS25 R56 J has a smaller footprint (1.075" L x 0.559" W vs. 1.933" L x 1.102" W). Both maintain the same seated height of 0.583" (14.80mm), allowing potential PCB layout optimization with the 25W variant.

Q: Do both parts meet RoHS requirements?

A: Yes. The HS50 R56 J is RoHS Compliant, and the HS25 R56 J is ROHS3 Compliant. Both satisfy RoHS regulatory requirements.

Q: What happens if I use HS25 R56 J in an application exceeding 25 watts?

A: Operating the HS25 R56 J beyond its 25-watt rating will cause excessive thermal stress, reducing component lifespan and potentially causing failure. Power rating selection must match application requirements.

Q: Are the temperature coefficients equivalent?

A: Yes. The HS50 R56 J specifies 100 ppm/°C, and the HS25 R56 J specifies ±100 ppm/°C. Both provide equivalent thermal stability for the 560 mOhms resistance value.