AHA500JB-75R Equivalent & Substitute Parts

Part Overview

The AHA500JB-75R is a 75 Ohms ±5% 5W wirewound chassis mount resistor manufactured by YAGEO in the AHA series. This component is designed for applications requiring precision current limiting, load balancing, and thermal management in industrial and commercial electronics. The part is currently active in production with full RoHS3 compliance and unlimited moisture sensitivity rating.

Substitute parts are identified when equivalent resistance values, power ratings, and mechanical compatibility allow direct replacement while maintaining or improving electrical performance characteristics.

Substiute Parts

AHA500JB-75R

YAGEOIn Stock: 1136AHA500JB-75R Datasheet

Current PartRFQ

805F75RE

OhmiteIn Stock: 1090805F75RE Datasheet

UpgradeRFQ

UAL5-75RF8

RiedonIn Stock: 1128UAL5-75RF8 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AHA500JB-75R is determined by the following criteria:

Primary Matching Parameters:

• Resistance value: 75 Ohms (exact match required)
• Composition: Wirewound (required for thermal and electrical characteristics)
• Mounting feature: Flanges with solder lugs (mechanical compatibility)
• Housing type: Aluminum (thermal management and form factor)

Allowable Variations:

• Tolerance: May be equal or tighter (±5% or better)
• Power rating: May be equal or higher (5W or greater)
• Temperature coefficient: May be equal or lower (±200ppm/°C or better)
• Operating temperature range: May be equal or extended
• Packaging format: Axial, Box configuration maintained

The identified substitute parts meet all primary matching parameters and represent upgrades or equivalent alternatives based on improved electrical specifications.

Parameter Comparison

Engineering Selection Recommendations

805F75RE (Ohmite Metal-Mite®89 Series)

This substitute provides improved tolerance specification (±1% versus ±5%) and extended operating temperature range (-55°C ~ 275°C versus -55°C ~ 250°C). Temperature coefficient is significantly improved at ±20ppm/°C. Power rating remains at 5W, matching the original specification. Physical dimensions are nearly identical with marginal height reduction (0.330" versus 0.358"). All compliance certifications match the original part. Packaging format changes from Bulk to Tray.

UAL5-75RF8 (Riedon UAL Series)

This substitute offers the highest performance upgrade with 7.5W power rating (50% increase over original 5W specification) while maintaining identical resistance and tolerance improvements (±1%). Temperature coefficient matches the Ohmite alternative at ±20ppm/°C. Operating temperature range extends to 275°C. Additional features include current sense capability, flame proof rating, pulse withstanding, and safety certifications. Physical dimensions remain compatible with flanged mounting. Packaging remains in Bulk format. Moisture sensitivity rating matches the original part at MSL 1 (Unlimited).

Both substitute parts maintain full RoHS3 compliance and REACH unaffected status. Selection between substitutes depends on power dissipation requirements and feature set needs within the application circuit.

Frequently Asked Questions (FAQ)

Q: Can the 805F75RE replace the AHA500JB-75R in all applications?

A: The 805F75RE is mechanically and electrically compatible for direct substitution. The tighter tolerance (±1% versus ±5%) and improved temperature coefficient (±20ppm/°C versus ±200ppm/°C) represent performance enhancements. The 5W power rating matches the original specification. Packaging changes from Bulk to Tray format; verify your procurement and assembly processes accommodate this change.

Q: When should the UAL5-75RF8 be selected over the 805F75RE?

A: Select the UAL5-75RF8 when the application requires higher power dissipation capability (7.5W versus 5W) or when additional safety features such as flame proof rating and pulse withstanding characteristics are specified. Both parts offer identical tolerance and temperature coefficient improvements. The UAL5-75RF8 maintains Bulk packaging format matching the original part.

Q: Are physical dimensions identical across all three parts?

A: Physical dimensions are nearly identical. Length and width measurements are within 0.009" (0.23mm) across all three parts. Height variation is minimal: AHA500JB-75R at 0.358" (9.10mm), 805F75RE at 0.330" (8.38mm), and UAL5-75RF8 at 0.335" (8.50mm). All parts maintain flanged mounting compatibility.

Q: Do all parts meet the same compliance requirements?

A: All three parts are ROHS3 compliant and REACH unaffected. ECCN and HTSUS classifications are identical. The AHA500JB-75R and UAL5-75RF8 share MSL 1 (Unlimited) rating. The 805F75RE lists MSL as Not Applicable due to its tray packaging format.

Q: What is the primary advantage of tighter tolerance specifications?

A: The ±1% tolerance on both substitute parts (versus ±5% on the original) reduces resistance variation across the production batch. This is critical in precision current sensing, load balancing, and impedance matching applications where component accuracy directly affects circuit performance.