ERG-3SJ430 Equivalent & Substitute Parts

Part Overview

The ERG-3SJ430 is a 43 Ohms ±5% 3W axial through-hole resistor manufactured by Panasonic Electronic Components. This metal oxide film resistor features flame-proof and safety characteristics, designed for applications requiring reliable power dissipation in the 3-watt range. The part is currently obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. Stackpole Electronics Inc offers active alternatives that maintain electrical and mechanical compatibility while providing current product availability.

Substiute Parts

ERG-3SJ430

Panasonic Electronic ComponentsIn Stock: 967ERG-3SJ430 Datasheet

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RSMF3JT43R0

Stackpole Electronics IncIn Stock: 813RSMF3JT43R0 Datasheet

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RSF3JT43R0

Stackpole Electronics IncIn Stock: 1033RSF3JT43R0 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ERG-3SJ430 is determined by the following critical parameters:

• Resistance value: 43 Ohms (exact match required)
• Tolerance: ±5% (exact match required)
• Power rating: 3W (exact match required)
• Composition: Metal Oxide Film (exact match required)
• Package: Axial through-hole (exact match required)
• Operating temperature range: -55°C to 235°C (exact match required)
• RoHS compliance: ROHS3 Compliant (required for regulatory compatibility)

The two substitute parts listed below meet all critical electrical and mechanical parameters. Variations in temperature coefficient and physical dimensions are within acceptable tolerances for axial resistor substitution.

Parameter Comparison

Engineering Selection Recommendations

Both RSMF3JT43R0 and RSF3JT43R0 are qualified substitutes for the obsolete ERG-3SJ430 based on electrical parameter equivalence and regulatory compliance.

RSMF3JT43R0 provides the closest physical match with identical dimensions (0.217" Dia x 0.591" L) and improved temperature coefficient performance (±200ppm/°C versus ±300ppm/°C). This part is recommended for applications where PCB layout constraints or mechanical fit requirements are critical.

RSF3JT43R0 offers the same electrical specifications with a slightly larger physical envelope (0.236" Dia x 0.689" L) and flame retardant coating instead of flame-proof construction. This part is suitable for applications where the larger footprint is accommodated and flame retardant characteristics meet safety requirements.

Both substitutes maintain ROHS3 compliance and the full -55°C to 235°C operating temperature range of the original part. Selection between the two should be based on available PCB space and specific safety certification requirements for the end application.

Frequently Asked Questions (FAQ)

Q: Can RSMF3JT43R0 and RSF3JT43R0 be used interchangeably with ERG-3SJ430?

A: Both parts meet the critical electrical specifications (43 Ohms, ±5%, 3W, metal oxide film, axial package). RSMF3JT43R0 is preferred for direct replacement due to identical physical dimensions. RSF3JT43R0 requires PCB layout verification due to its larger size (0.236" Dia x 0.689" L versus 0.217" Dia x 0.591" L).

Q: What is the difference between flame-proof and flame retardant coating?

A: The ERG-3SJ430 features flame-proof construction, while RSF3JT43R0 uses flame retardant coating. Both provide safety characteristics; the specific requirement depends on the application's safety certification standard. Verify your design's safety requirements before selecting between these options.

Q: Are the temperature coefficients different between substitutes?

A: Yes. ERG-3SJ430 has ±300ppm/°C, while both Stackpole alternatives have ±200ppm/°C. The Stackpole parts demonstrate superior temperature stability. This difference is acceptable for most applications; verify if your circuit design requires the original specification.

Q: What packaging formats are available?

A: ERG-3SJ430 is supplied in bulk packaging. Both RSMF3JT43R0 and RSF3JT43R0 are available in Tape & Reel (TR) format, which is standard for automated assembly processes.

Q: Are all parts RoHS compliant?

A: Yes. ERG-3SJ430, RSMF3JT43R0, and RSF3JT43R0 are all ROHS3 compliant, meeting current environmental and regulatory requirements.