B5J2K7 Equivalent & Substitute Parts

Part Overview

The B5J2K7 is a 2.7 kOhms ±5% 5.25W through-hole axial wirewound resistor manufactured by Ohmite, part of the Brown Devil® 200 series. This component is designed for applications requiring high power dissipation in a compact axial package with flame retardant coating and safety features. The part is currently active in production with 680 units in stock. Substitute parts may be required due to inventory constraints, packaging preferences, or compliance requirements specific to end-use applications.

Substiute Parts

B5J2K7

OhmiteIn Stock: 705B5J2K7 Datasheet

Current PartRFQ

B5J2K7E

OhmiteIn Stock: 933B5J2K7E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the B5J2K7 is based on strict electrical and mechanical parameter matching. The following criteria determine valid equivalency:

• Resistance value: 2.7 kOhms (exact match required)
• Tolerance: ±5% (exact match required)
• Power rating: 5.25W (exact match required)
• Composition: Wirewound (exact match required)
• Package: Axial through-hole (exact match required)
• Physical dimensions: 0.250" Dia x 0.625" L (exact match required)
• Temperature coefficient: ±260ppm/°C (exact match required)
• Features: Flame retardant coating and safety characteristics (exact match required)

The B5J2K7E meets all these criteria and is classified as a parametric equivalent. Differences in packaging format (bulk vs. standard), series designation, and compliance certifications do not affect functional interchangeability in the circuit.

Parameter Comparison

Engineering Selection Recommendations

Both the B5J2K7 and B5J2K7E are active production components from Ohmite with identical electrical and mechanical specifications. Selection between these parts should be based on the following factors:

• RoHS Compliance: The B5J2K7E is RoHS compliant, while the B5J2K7 is non-compliant. Applications subject to RoHS regulations require the B5J2K7E.
• Packaging Format: The B5J2K7E is supplied in bulk packaging, while the B5J2K7 uses standard packaging. Procurement and handling procedures may differ accordingly.
• Inventory Availability: The B5J2K7E has higher current stock levels (893 units vs. 680 units), which may influence lead time considerations.
• Moisture Sensitivity: The B5J2K7E is rated MSL 1 (Unlimited), indicating superior moisture resistance characteristics compared to the B5J2K7.

Both parts are functionally equivalent for circuit applications requiring a 2.7 kOhms 5.25W axial wirewound resistor with flame retardant coating.

Frequently Asked Questions (FAQ)

Q: Can the B5J2K7E be used as a direct replacement for the B5J2K7?

A: Yes. Both parts have identical resistance, tolerance, power rating, composition, package type, physical dimensions, and temperature coefficient. They are functionally equivalent for all circuit applications.

Q: What is the difference between the B5J2K7 and B5J2K7E?

A: The primary differences are RoHS compliance status (B5J2K7E is compliant; B5J2K7 is non-compliant), packaging format (bulk vs. standard), series designation (B5 Series vs. Brown Devil® 200), and moisture sensitivity rating (MSL 1 vs. Not Applicable).

Q: Which part should I specify for a new design?

A: Specify the B5J2K7E for new designs. It offers RoHS compliance, superior moisture sensitivity rating, and higher inventory availability.

Q: Are there any physical installation differences between these parts?

A: No. Both parts have identical axial package dimensions (0.250" Dia x 0.625" L) and two terminations. Installation procedures and PCB footprints are identical.

Q: What is the temperature coefficient significance?

A: Both parts have a temperature coefficient of ±260ppm/°C, meaning resistance changes by approximately 260 parts per million for each degree Celsius change in operating temperature. This specification is identical between the two parts.

Q: Can I mix B5J2K7 and B5J2K7E parts in the same production batch?

A: Yes, provided your application does not have RoHS compliance requirements. If RoHS compliance is mandatory, use only the B5J2K7E throughout production.