B20J45K Equivalent & Substitute Parts

Part Overview

The B20J45K is a 45 kOhms ±5% 20W through-hole axial wirewound resistor manufactured by Ohmite as part of the Brown Devil® 200 series. This component is designed for applications requiring high power dissipation with flame retardant coating and safety features. The part is currently in active production status with 986 units in stock. Substitute parts are identified to provide alternative sourcing options while maintaining electrical and mechanical compatibility.

Substiute Parts

B20J45K

OhmiteIn Stock: 999B20J45K Datasheet

Current PartRFQ

B20J45KE

OhmiteIn Stock: 1177B20J45KE Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the B20J45K is determined by strict equivalence across the following critical parameters:

• Resistance value: 45 kOhms
• Tolerance: ±5%
• Power rating: 20W
• Composition: Wirewound
• Package configuration: Axial
• Temperature coefficient: ±260ppm/°C
• Physical dimensions: 0.437" Dia x 2.000" L
• Termination count: 2

The B20J45KE meets all these criteria and is classified as a parametric equivalent. The only distinction between the main part and substitute is packaging format (tape/reel versus bulk) and RoHS compliance status.

Parameter Comparison

Engineering Selection Recommendations

Both B20J45K and B20J45KE are active production components from Ohmite with identical electrical and mechanical specifications. Selection between these parts should be based on the following factors:

B20J45K is suitable for applications where RoHS non-compliance is acceptable or where standard packaging is preferred. Current inventory of 986 units supports immediate availability.

B20J45KE is the appropriate choice for applications requiring ROHS3 compliance. This variant maintains all electrical and mechanical equivalence while meeting enhanced environmental standards. Inventory of 1089 units ensures supply continuity.

Both parts are interchangeable from an electrical performance standpoint. The decision between them depends solely on regulatory requirements and packaging format needs.

Frequently Asked Questions (FAQ)

Q: Are B20J45K and B20J45KE electrically identical? A: Yes. Both parts have identical resistance (45 kOhms), tolerance (±5%), power rating (20W), temperature coefficient (±260ppm/°C), and composition (wirewound). They are parametric equivalents.

Q: What is the difference between B20J45K and B20J45KE? A: The primary differences are packaging format (standard versus bulk) and RoHS compliance status. B20J45KE is ROHS3 compliant, while B20J45K is RoHS non-compliant.

Q: Can I use B20J45KE as a direct replacement for B20J45K? A: Yes, provided your application does not have specific RoHS non-compliance requirements. The parts are mechanically and electrically interchangeable.

Q: Are the physical dimensions identical? A: Yes. Both parts measure 0.437" Dia x 2.000" L (11.11mm x 50.80mm) and use axial packaging with 2 terminations.

Q: Which part should I select for new designs? A: Selection depends on regulatory requirements. If ROHS3 compliance is required, use B20J45KE. If RoHS compliance is not a constraint, either part is suitable based on packaging and inventory availability.

Q: Do these parts have the same temperature coefficient? A: Yes. Both B20J45K and B20J45KE have a temperature coefficient of ±260ppm/°C.