B12J30R Equivalent & Substitute Parts

Part Overview

The B12J30R is a 30 Ohm, 12W axial wirewound 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 736 units in stock. Substitute parts are identified to address packaging variations and compliance requirements while maintaining identical electrical and mechanical specifications.

Substiute Parts

B12J30R

OhmiteIn Stock: 754B12J30R Datasheet

Current PartRFQ

B12J30RE

OhmiteIn Stock: 1065B12J30RE Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the B12J30R is determined by strict equivalence across the following critical parameters:

• Resistance value: 30 Ohms
• Tolerance: ±5%
• Power rating: 12W
• Composition: Wirewound
• Package configuration: Axial
• Physical dimensions: 0.313" Dia x 1.750" L
• Temperature coefficient: ±260ppm/°C
• Features: Flame retardant coating and safety construction

The B12J30RE qualifies as a parametric equivalent because it maintains identical electrical characteristics and mechanical form factor. The primary distinction is packaging format (Bulk versus standard packaging) and RoHS compliance status, which do not affect functional interchangeability in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Both B12J30R and B12J30RE are active production components with identical electrical and mechanical specifications. Selection between these parts should be based on regulatory and compliance requirements:

The B12J30R is suitable for applications where RoHS non-compliance is acceptable or where legacy component specifications are required.

The B12J30RE is the preferred selection for applications requiring ROHS3 compliance. This variant maintains full functional equivalence while meeting current environmental and regulatory standards. Higher inventory availability (1026 units) also supports supply chain continuity.

Both parts are suitable for direct substitution in circuit designs without modification to PCB layouts, mounting hardware, or electrical parameters.

Frequently Asked Questions (FAQ)

Q: Can B12J30RE be used as a direct replacement for B12J30R in existing designs?

A: Yes. Both parts are electrically and mechanically identical. The B12J30RE can be substituted without circuit redesign or PCB modification. The primary difference is RoHS compliance status and packaging format.

Q: What is the significance of the packaging difference between B12J30R and B12J30RE?

A: The B12J30R uses standard packaging while the B12J30RE is supplied in Bulk packaging. This distinction affects procurement and handling procedures but does not impact component performance or compatibility.

Q: Are there any thermal or performance differences between these parts?

A: No. Both parts share identical temperature coefficient (±260ppm/°C), power rating (12W), and thermal characteristics. Performance in thermal cycling and high-temperature applications is equivalent.

Q: Which part should be selected for new designs?

A: The B12J30RE is recommended for new designs due to ROHS3 compliance, which aligns with current environmental regulations and supply chain standards. Functional performance is identical to the B12J30R.

Q: Are the physical dimensions identical for PCB layout purposes?

A: Yes. Both parts have identical axial dimensions of 0.313" Dia x 1.750" L (7.94mm x 44.45mm). PCB footprints and mounting hole spacing are interchangeable.