B12J900 Equivalent & Substitute Parts Reference

Part Overview

The B12J900 is a 900 Ohm, 12W 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 a compact axial package. The part is currently active in production with 916 units in stock. Substitute parts are identified to provide alternative sourcing options while maintaining electrical and mechanical compatibility.

Substiute Parts

B12J900

OhmiteIn Stock: 1005B12J900 Datasheet

Current PartRFQ

B12J900E

OhmiteIn Stock: 1017B12J900E Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the B12J900 is based on strict electrical and mechanical parameter matching:

Critical Parameters for Substitution:

• Resistance value: 900 Ohms
• Tolerance: ±5%
• Power rating: 12W
• Composition: Wirewound
• Package: Axial
• Physical dimensions: 0.313" Dia x 1.750" L
• Temperature coefficient: ±260ppm/°C
• Features: Flame retardant coating and safety construction

The B12J900E is identified as a direct substitute, maintaining identical electrical specifications and physical dimensions while differing only in packaging configuration and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

Both B12J900 and B12J900E are active production parts from Ohmite with identical electrical and mechanical specifications. Selection between these parts should be based on regulatory and compliance requirements:

The B12J900E is ROHS3 compliant and carries MSL rating 1 (Unlimited), making it suitable for applications subject to RoHS directives and moisture-sensitive device handling protocols. The B12J900 is RoHS non-compliant and carries no MSL rating, appropriate for applications without such regulatory constraints.

Both parts maintain the same 900 Ohm resistance, ±5% tolerance, 12W power rating, wirewound composition, and axial package configuration. Inventory availability is comparable, with B12J900E showing slightly higher stock levels at 996 units.

Frequently Asked Questions (FAQ)

Q: Can B12J900E be used as a direct replacement for B12J900?

A: Yes. Both parts are electrically and mechanically identical, with 900 Ohm resistance, ±5% tolerance, 12W power rating, and identical physical dimensions (0.313" Dia x 1.750" L). The primary differences are packaging format and compliance certifications.

Q: What is the difference in RoHS compliance between these parts?

A: B12J900 is RoHS non-compliant, while B12J900E is ROHS3 compliant. Selection depends on whether your application or market requires RoHS certification.

Q: Are the physical dimensions identical?

A: Yes. Both parts measure 0.313" diameter by 1.750" length (7.94mm x 44.45mm), ensuring identical PCB footprint and mounting compatibility.

Q: What does MSL rating mean for these parts?

A: Moisture Sensitivity Level (MSL) indicates moisture handling requirements during storage and assembly. B12J900E carries MSL 1 (Unlimited), meaning no moisture precautions are required. B12J900 carries no MSL rating.

Q: Are both parts currently in production?

A: Yes. Both B12J900 and B12J900E are active production parts with current inventory availability.

Q: What is the temperature coefficient specification?

A: Both parts have a temperature coefficient of ±260ppm/°C, ensuring consistent resistance performance across the operating temperature range.