23J4K5 Equivalent & Substitute Parts

Part Overview

The 23J4K5 is a 4.5 kOhms ±5% 3W through-hole axial wirewound resistor manufactured by Ohmite. This component features flame retardant coating and safety characteristics, designed for applications requiring reliable power dissipation in compact form factors. The part maintains active product status with 962 units in current inventory. Substitute parts are identified to address supply continuity, compliance requirements, or specific application needs while maintaining electrical and mechanical compatibility.

Substiute Parts

23J4K5

OhmiteIn Stock: 104123J4K5 Datasheet

Current PartRFQ

ALSR034K500JE12

Vishay DaleIn Stock: 1136ALSR034K500JE12 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 23J4K5 is determined by the following critical parameters:

• Resistance Value: Must be 4.5 kOhms
• Tolerance: Must be ±5% or tighter
• Power Rating: Must be 3W or greater
• Composition: Must be wirewound
• Package Type: Must be axial
• Temperature Coefficient: Must be ±30ppm/°C or better
• Terminations: Must be 2-pin configuration

The ALSR034K500JE12 from Vishay Dale meets all substitution criteria. Both parts share identical electrical specifications and axial package geometry, with compatible physical dimensions suitable for standard PCB layouts and through-hole assembly processes.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection (23J4K5): Use when flame retardant coating and safety-rated characteristics are explicitly required by application specifications or regulatory requirements.

Substitute Selection (ALSR034K500JE12): Use when RoHS3 compliance is mandatory or when supply of the primary part is constrained. The ALSR034K500JE12 provides defined operating temperature range (-65°C ~ 250°C) and moisture resistance features not specified in the 23J4K5 datasheet. Physical dimensions are slightly reduced, which may provide layout advantages in space-constrained applications. Both parts are electrically and mechanically interchangeable for standard through-hole PCB assembly.

Frequently Asked Questions (FAQ)

Q: Can ALSR034K500JE12 replace 23J4K5 in all applications?

A: Yes, for applications where RoHS3 compliance is acceptable. Both parts share identical electrical specifications (4.5 kOhms, ±5%, 3W, ±30ppm/°C). The primary difference is RoHS compliance status and the ALSR's defined operating temperature range. If flame retardant coating is a specific design requirement, verify that the ALSR meets those requirements with the manufacturer.

Q: What are the physical dimension differences?

A: The 23J4K5 measures 0.220" diameter × 0.516" length (5.60mm × 13.10mm). The ALSR034K500JE12 measures 0.180" diameter × 0.500" length (4.57mm × 12.70mm). The ALSR is slightly smaller in both dimensions, which may affect board layout spacing but remains compatible with standard axial component footprints.

Q: Are there compliance differences between these parts?

A: Yes. The 23J4K5 is RoHS non-compliant, while the ALSR034K500JE12 is ROHS3 compliant. For applications subject to RoHS regulations, the ALSR is the required choice. Both parts carry EAR99 ECCN classification and identical HTSUS codes.

Q: What is the moisture sensitivity difference?

A: The 23J4K5 lists moisture sensitivity as not applicable. The ALSR034K500JE12 is rated MSL 1 (Unlimited), indicating superior moisture resistance. This makes the ALSR more suitable for humid or high-moisture environments.

Q: Can these parts be used interchangeably on existing PCBs?

A: Yes. Both parts are axial wirewound resistors with 2-pin terminations and compatible electrical specifications. The slightly smaller physical dimensions of the ALSR may require minor footprint adjustments in very tight layouts, but standard axial component spacing accommodates both sizes.