ERG-1SJ301A Equivalent & Substitute Parts

Part Overview

The ERG-1SJ301A is a 300 Ohms ±5% 1W through hole resistor manufactured by Panasonic Electronic Components. This axial metal oxide film resistor features flame proof and safety characteristics, designed for applications requiring reliable performance across industrial temperature ranges. The product is currently obsolete, making identification of compatible substitute components essential for ongoing system maintenance and new design implementations.

Substiute Parts

ERG-1SJ301A

Panasonic Electronic ComponentsIn Stock: 748ERG-1SJ301A Datasheet

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RSMF1JA300R

Stackpole Electronics IncIn Stock: 870RSMF1JA300R Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the ERG-1SJ301A is determined by strict equivalence across the following critical parameters:

• Resistance value: 300 Ohms
• Tolerance: ±5%
• Power rating: 1W
• Composition: Metal Oxide Film
• Package configuration: Axial through hole
• Safety and flame proof characteristics
• RoHS3 compliance

The RSMF1JA300R from Stackpole Electronics Inc meets all mandatory electrical and mechanical requirements for direct substitution. Both components share identical resistance, tolerance, power rating, composition, and package type. Compliance certifications (RoHS3, REACH, EAR99) are equivalent across both parts.

Parameter Comparison

Engineering Selection Recommendations

The RSMF1JA300R is a direct functional equivalent to the ERG-1SJ301A for applications requiring 300 Ohm 1W axial metal oxide film resistors with flame proof and safety characteristics. Both components maintain ROHS3 compliance and equivalent regulatory certifications (REACH, EAR99).

The RSMF1JA300R offers the advantage of active product status, ensuring continued availability and supply chain reliability. The Stackpole component exhibits a lower temperature coefficient (±200ppm/°C versus ±350ppm/°C), which may provide improved stability in temperature-sensitive applications. The maximum operating temperature of the RSMF1JA300R is 200°C compared to 235°C for the original part; applications operating above 200°C require confirmation of thermal requirements.

Physical dimensions differ slightly: the RSMF1JA300R has a larger diameter (0.126" versus 0.110") while maintaining identical length. PCB layout and mechanical clearance must be evaluated for space-constrained designs.

Frequently Asked Questions (FAQ)

Q: Can RSMF1JA300R replace ERG-1SJ301A in all applications?

A: The RSMF1JA300R is electrically and mechanically equivalent for standard applications. Verify maximum operating temperature requirements if your application exceeds 200°C, as the Stackpole component is rated to 200°C versus the original 235°C maximum.

Q: What are the physical differences between these parts?

A: Both components are axial through hole resistors with identical length (0.354"). The RSMF1JA300R has a slightly larger diameter (0.126" versus 0.110"). Confirm PCB hole spacing and mechanical clearance accommodate the larger diameter.

Q: Are both parts RoHS compliant?

A: Yes, both ERG-1SJ301A and RSMF1JA300R are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

Q: Why is the ERG-1SJ301A marked obsolete?

A: The ERG-1SJ301A is no longer in active production by Panasonic. The RSMF1JA300R from Stackpole Electronics Inc provides equivalent functionality with active product status and ongoing supply availability.

Q: Does temperature coefficient difference affect substitution?

A: The RSMF1JA300R exhibits lower temperature coefficient drift (±200ppm/°C versus ±350ppm/°C). For precision applications with tight tolerance requirements across temperature ranges, the Stackpole component may provide superior performance stability.