B8J400 Equivalent & Substitute Parts Reference

Part Overview

The B8J400 is a 400 Ohm, 8W wirewound axial resistor manufactured by Ohmite as part of the Brown Devil® 200 series. This through-hole component features flame retardant coating and safety construction, designed for applications requiring high power dissipation in compact form factors. The part is currently active in production with 779 units in stock. Substitute parts are identified to address inventory availability, packaging preferences, and compliance requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

B8J400

OhmiteIn Stock: 843B8J400 Datasheet

Current PartRFQ

B8J400E

OhmiteIn Stock: 1135B8J400E Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the B8J400 is determined by strict equivalence across the following critical parameters:

• Resistance value: 400 Ohms
• Tolerance: ±5%
• Power rating: 8W
• Composition: Wirewound
• Package type: Axial
• Physical dimensions: 0.313" Dia x 1.000" L
• Temperature coefficient: ±260ppm/°C
• Features: Flame retardant coating and safety construction

The B8J400E qualifies as a direct substitute because it maintains identical electrical specifications and mechanical form factor. Differences exist only in packaging configuration (bulk versus standard) and compliance certifications, which do not affect functional interchangeability in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Both B8J400 and B8J400E are active production components from Ohmite with identical electrical and mechanical specifications. Selection between these parts should be based on the following factors:

B8J400 is appropriate for applications where RoHS non-compliant components are acceptable and standard packaging is preferred.

B8J400E is the preferred choice for applications requiring ROHS3 compliance. This variant offers higher inventory availability (1076 units versus 779 units) and bulk packaging options, making it suitable for high-volume production environments.

Both parts are functionally equivalent in circuit performance and occupy identical PCB footprints.

Frequently Asked Questions (FAQ)

Q: Can B8J400E be used as a direct replacement for B8J400 in existing designs?

A: Yes. The B8J400E is electrically and mechanically identical to the B8J400. Both components have the same resistance value (400 Ohms), tolerance (±5%), power rating (8W), physical dimensions (0.313" Dia x 1.000" L), and temperature coefficient (±260ppm/°C). They are interchangeable at the circuit level.

Q: What is the primary difference between B8J400 and B8J400E?

A: The primary differences are packaging configuration (bulk versus standard) and RoHS compliance status. The B8J400E is ROHS3 compliant, while the B8J400 is RoHS non-compliant. Electrical performance and physical form factor are identical.

Q: Are there any PCB layout considerations when substituting B8J400 with B8J400E?

A: No. Both parts share identical axial package dimensions and termination configuration. No PCB layout modifications are required for substitution.

Q: Which part should be selected for new designs?

A: For new designs, B8J400E is recommended due to ROHS3 compliance and higher inventory availability. This ensures regulatory alignment and supply chain continuity.

Q: Do these parts have different thermal characteristics?

A: No. Both parts have identical temperature coefficients (±260ppm/°C) and thermal performance characteristics.