Equivalent & Substitute Parts for B20KR50

Part Overview

The B20KR50 is a 500 mOhms ±10% 20W axial wirewound resistor manufactured by Ohmite, part of the Brown Devil® 200 series. This through-hole component features flame retardant coating and safety construction, designed for applications requiring precision current-limiting and power dissipation in industrial and electronic equipment. The part maintains active product status with 1121 units in current inventory. Substitute parts are identified to address supply continuity, compliance requirements, or specific application constraints while maintaining electrical and mechanical compatibility.

Substiute Parts

B20KR50

OhmiteIn Stock: 1183B20KR50 Datasheet

Current PartRFQ

B20KR50E

OhmiteIn Stock: 922B20KR50E Datasheet

Parametric EquivalentRFQ

B20KR50E

OhmiteIn Stock: 922B20KR50E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the B20KR50 is determined by strict equivalence across the following critical parameters:

• Resistance value: 500 mOhms
• Tolerance: ±10%
• Power rating: 20W
• Composition: Wirewound
• Package configuration: Axial
• Physical dimensions: 0.437" Dia x 2.000" L
• Temperature coefficient: ±400ppm/°C
• Features: Flame retardant coating and safety construction

The B20KR50E qualifies as a parametric equivalent, matching all electrical specifications and mechanical dimensions. Differences in RoHS compliance status and moisture sensitivity level do not affect functional substitution but may influence application suitability based on regulatory or environmental requirements.

Parameter Comparison

Engineering Selection Recommendations

Both B20KR50 and B20KR50E are active products from Ohmite with identical electrical and mechanical specifications. Selection between these parts should be based on compliance requirements:

• B20KR50 is suitable for applications where RoHS compliance is not mandated or where legacy component specifications are required.
• B20KR50E is the appropriate choice for designs requiring RoHS compliance or for new product development subject to environmental regulations.

Both parts maintain equivalent performance in current-limiting and power dissipation applications. Physical interchangeability is confirmed through identical axial package dimensions and termination configuration.

Frequently Asked Questions (FAQ)

Q: Can B20KR50E be used as a direct replacement for B20KR50?

A: Yes. The B20KR50E is electrically and mechanically equivalent to the B20KR50. Both components share identical resistance, tolerance, power rating, composition, package type, and physical dimensions. Direct substitution is supported without circuit modification.

Q: What is the difference between B20KR50 and B20KR50E?

A: The primary differences are RoHS compliance status and moisture sensitivity level designation. The B20KR50 is RoHS non-compliant with no moisture sensitivity rating, while the B20KR50E is RoHS compliant with MSL 1 (Unlimited). Electrical performance and mechanical form factor are identical.

Q: Which part should be selected for new designs?

A: B20KR50E is recommended for new product development, as it meets RoHS compliance requirements applicable to most modern electronic equipment. The B20KR50 remains suitable for legacy systems or applications where RoHS compliance is not a requirement.

Q: Are the axial package dimensions identical between both parts?

A: Yes. Both B20KR50 and B20KR50E are packaged as 0.437" diameter by 2.000" length axial components (11.11mm x 50.80mm), ensuring identical PCB layout and mechanical fit.

Q: What applications are these 20W wirewound resistors suitable for?

A: These 500 mOhms 20W axial wirewound resistors are designed for current-limiting, power dissipation, and precision measurement applications in industrial control systems, power supplies, and electronic test equipment where flame retardant and safety-rated construction is required.