KAL50FB100R Equivalent & Substitute Parts

Part Overview

The KAL50FB100R is a 100 Ohms ±1% 50W wirewound chassis mount resistor manufactured by Stackpole Electronics Inc. This component is designed for high-power applications requiring precision resistance with thermal stability across extended operating ranges. The part is currently in active production status with 962 units in stock. Equivalent and substitute parts are identified when component availability is limited, supply chain disruptions occur, or design flexibility permits cross-manufacturer sourcing while maintaining electrical and mechanical compatibility.

Substiute Parts

KAL50FB100R

Stackpole Electronics IncIn Stock: 1064KAL50FB100R Datasheet

Current PartRFQ

RH050100R0FE02

Vishay DaleIn Stock: 1620RH050100R0FE02 Datasheet

DirectRFQ

TMC050100R0FE02

Vishay DaleIn Stock: 866TMC050100R0FE02 Datasheet

DirectRFQ

UAL50-100RF8

RiedonIn Stock: 1259UAL50-100RF8 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the KAL50FB100R is determined by strict equivalence across the following critical parameters:

• Resistance value: 100 Ohms
• Tolerance: ±1%
• Power rating: 50W
• Composition: Wirewound
• Temperature coefficient: ±20ppm/°C
• Housing type: Aluminum with flanges
• Lead style: Solder lugs
• Package configuration: Axial, Box
• RoHS compliance: ROHS3 Compliant

All identified substitute parts meet these core electrical and mechanical specifications. Variations in operating temperature range, physical dimensions within tolerance, and height-seated measurements do not disqualify substitution when the primary functional parameters remain equivalent.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts—RH050100R0FE02, TMC050100R0FE02, and UAL50-100RF8—maintain active production status and full ROHS3 compliance, ensuring regulatory alignment with the original KAL50FB100R specification.

RH050100R0FE02 and TMC050100R0FE02 (both Vishay Dale) operate within a -55°C to 250°C temperature range, which is 25°C lower than the KAL50FB100R maximum. These parts are suitable for applications where the upper operating temperature does not exceed 250°C.

UAL50-100RF8 (Riedon) matches the full -55°C to 275°C operating temperature range of the original part and includes additional functional features: current sense capability, flame proof construction, pulse withstanding rating, and safety certification. This part is electrically and thermally equivalent across the complete specified operating envelope.

REACH compliance status for TMC050100R0FE02 is listed as vendor undefined; confirmation with the manufacturer is necessary if REACH documentation is required for end-use applications.

Frequently Asked Questions (FAQ)

Q: Can RH050100R0FE02 or TMC050100R0FE02 be used as direct replacements for KAL50FB100R in all applications?

A: These Vishay Dale parts are electrically equivalent but operate to a maximum temperature of 250°C versus 275°C for the KAL50FB100R. Substitution is valid only when the application's maximum operating temperature does not exceed 250°C.

Q: What are the physical dimension differences between the main part and substitutes?

A: All parts share identical length and width dimensions (1.968" L × 1.140" W / 49.99mm × 28.96mm). Height-seated measurements vary slightly: KAL50FB100R measures 0.641" (16.28mm), while RH050100R0FE02 and TMC050100R0FE02 measure 0.625" (15.87mm), and UAL50-100RF8 measures 0.630" (16.00mm). These variations remain within standard mechanical tolerances for chassis mount applications.

Q: Is UAL50-100RF8 a complete equivalent to KAL50FB100R?

A: Yes. UAL50-100RF8 matches all critical electrical parameters, maintains the full -55°C to 275°C operating temperature range, and achieves ROHS3 and REACH compliance. The additional features (current sense, flame proof, pulse withstanding, safety certification) do not affect basic substitution compatibility.

Q: What is the inventory status of substitute parts?

A: RH050100R0FE02 has 1539 units in stock, TMC050100R0FE02 has 770 units in stock, and UAL50-100RF8 has 1206 units in stock. All substitutes maintain higher inventory levels than the original KAL50FB100R (962 units).

Q: Are there REACH compliance concerns with any substitute?

A: TMC050100R0FE02 lists REACH status as vendor undefined. RH050100R0FE02 and UAL50-100RF8 are confirmed REACH unaffected. Verification with the manufacturer is recommended if REACH compliance documentation is mandatory for your application.