AHA50AFB-1R5 Wirewound Chassis Mount Resistor: Equivalent & Substitute Parts

Part Overview

The AHA50AFB-1R5 is a 1.5 Ohms ±1% 50W wirewound chassis mount resistor manufactured by YAGEO. This component is classified as Active product status and is designed for applications requiring precision current limiting, load balancing, and thermal management in industrial and power electronics circuits. The part is ROHS3 compliant and suitable for operating environments ranging from -55°C to 250°C. Equivalent and substitute parts are identified based on matching electrical specifications (resistance value, tolerance, power rating) and mechanical compatibility (mounting features, physical dimensions, lead style).

Substiute Parts

AHA50AFB-1R5

YAGEOIn Stock: 762AHA50AFB-1R5 Datasheet

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KAL50FB1R50

Stackpole Electronics IncIn Stock: 1646KAL50FB1R50 Datasheet

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RH0501R500FE02

Vishay DaleIn Stock: 1247RH0501R500FE02 Datasheet

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TMC0501R500FE02

Vishay DaleIn Stock: 1269TMC0501R500FE02 Datasheet

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UAL50-1R5F8

RiedonIn Stock: 2223UAL50-1R5F8 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AHA50AFB-1R5 are qualified based on the following criteria:

Electrical Equivalence: All substitute parts maintain identical resistance value (1.5 Ohms), tolerance (±1%), and power rating (50W). All parts utilize wirewound composition technology.

Mechanical Compatibility: All substitute parts feature aluminum housing with flange mounting and solder lug lead style, ensuring direct mechanical interchangeability in chassis mount applications.

Environmental Compliance: All substitute parts are ROHS3 compliant and REACH unaffected, meeting regulatory requirements for the AHA50AFB-1R5 application context.

Dimensional Compatibility: Physical dimensions across all parts are within acceptable tolerance ranges (length 49.99–50.00 mm, width 28.96–29.00 mm, height 15.87–16.50 mm), permitting board-level substitution without redesign.

The following parts meet these substitution criteria: KAL50FB1R50 (Stackpole Electronics Inc), RH0501R500FE02 (Vishay Dale), TMC0501R500FE02 (Vishay Dale), and UAL50-1R5F8 (Riedon).

Parameter Comparison

Engineering Selection Recommendations

All four substitute parts are Active product status components with full ROHS3 compliance and REACH unaffected certification, matching the regulatory posture of the AHA50AFB-1R5.

KAL50FB1R50 (Stackpole Electronics Inc): Offers improved temperature coefficient (±50ppm/°C versus ±200ppm/°C) and extended operating temperature range to 275°C. Moisture resistant feature provides enhanced environmental protection. Highest inventory availability (1601 pcs).

RH0501R500FE02 (Vishay Dale): Provides temperature coefficient improvement and moisture resistant construction. Dimensions and thermal characteristics align with AHA50AFB-1R5 specifications. Inventory: 1144 pcs.

TMC0501R500FE02 (Vishay Dale): Functionally equivalent to RH0501R500FE02 with identical electrical and thermal specifications. Moisture resistant feature. Inventory: 1179 pcs.

UAL50-1R5F8 (Riedon): Maintains identical temperature coefficient (±200ppm/°C) and MSL rating (1 Unlimited) as the AHA50AFB-1R5, ensuring closest thermal and moisture sensitivity alignment. Extended operating temperature to 275°C. Additional features include current sense, flame proof, pulse withstanding, and safety certifications. Highest inventory availability (2184 pcs).

Frequently Asked Questions (FAQ)

Q: Can I substitute the AHA50AFB-1R5 with any of these parts without circuit redesign?

A: Yes. All substitute parts maintain identical electrical specifications (1.5 Ohms ±1% 50W), mechanical mounting (flange-mounted with solder lugs), and physical dimensions within acceptable tolerance ranges. Direct substitution is supported at the board level.

Q: What is the significance of temperature coefficient differences?

A: Temperature coefficient indicates resistance value drift with temperature change. The AHA50AFB-1R5 exhibits ±200ppm/°C, while substitute parts (except UAL50-1R5F8) offer ±50ppm/°C. Lower temperature coefficient values provide improved stability in temperature-sensitive applications. Selection depends on circuit tolerance requirements.

Q: Are all parts ROHS3 compliant?

A: Yes. All parts listed—AHA50AFB-1R5, KAL50FB1R50, RH0501R500FE02, TMC0501R500FE02, and UAL50-1R5F8—are ROHS3 compliant and REACH unaffected.

Q: What does "Moisture Resistant" mean for these resistors?

A: Moisture resistant construction provides enhanced protection against humidity and environmental moisture ingress. KAL50FB1R50, RH0501R500FE02, and TMC0501R500FE02 feature this enhancement. The AHA50AFB-1R5 and UAL50-1R5F8 carry MSL ratings (1 Unlimited) indicating unlimited moisture sensitivity level.

Q: Which substitute offers the best thermal performance?

A: KAL50FB1R50 and UAL50-1R5F8 both extend operating temperature range to 275°C (versus 250°C for AHA50AFB-1R5). KAL50FB1R50 additionally provides ±50ppm/°C temperature coefficient for superior stability. UAL50-1R5F8 maintains the original ±200ppm/°C coefficient while extending temperature range.

Q: Are dimensional differences significant?

A: Dimensional variations are minimal (length 49.99–50.00 mm, width 28.96–29.00 mm, height 15.87–16.50 mm). All parts are mechanically interchangeable in standard chassis mount applications. Height variation of 0.63 mm maximum is within typical PCB tolerance and mounting clearance specifications.

Q: What inventory considerations should I evaluate?

A: Current inventory levels are: UAL50-1R5F8 (2184 pcs), KAL50FB1R50 (1601 pcs), TMC0501R500FE02 (1179 pcs), RH0501R500FE02 (1144 pcs), and AHA50AFB-1R5 (751 pcs). Substitute parts offer higher availability for production planning.