ERG-3SJ751 Equivalent & Substitute Parts

Part Overview

The ERG-3SJ751 is a 750 Ohm ±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 compact form factors. The part is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications.

Substiute Parts

ERG-3SJ751

Panasonic Electronic ComponentsIn Stock: 983ERG-3SJ751 Datasheet

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RSMF5JT750R

Stackpole Electronics IncIn Stock: 861RSMF5JT750R Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the ERG-3SJ751 is determined by the following critical parameters:

• Resistance Value: Must be 750 Ohms
• Tolerance: Must be ±5%
• Composition: Must be Metal Oxide Film
• Package Type: Must be Axial through-hole
• Operating Temperature Range: Must support -55°C to 235°C minimum
• Features: Must include Flame Proof and Safety characteristics
• Compliance: Must maintain ROHS3 compliance

The RSMF5JT750R from Stackpole Electronics Inc meets all substitution criteria. While it offers a higher power rating (5W versus 3W), this represents an upgrade that maintains full compatibility with the original specification and provides enhanced thermal margin.

Parameter Comparison

Engineering Selection Recommendations

The RSMF5JT750R is the direct substitute for the ERG-3SJ751. Selection is based on:

• Product Status: The ERG-3SJ751 is obsolete; the RSMF5JT750R is active and maintains current manufacturing support
• Electrical Equivalence: Identical resistance, tolerance, and composition specifications ensure functional compatibility
• Compliance: Both parts maintain ROHS3 compliance and meet the same regulatory requirements
• Thermal Performance: The RSMF5JT750R provides improved temperature coefficient performance (±200ppm/°C versus ±300ppm/°C)
• Power Margin: The 5W rating of the substitute provides additional thermal headroom compared to the original 3W specification

Frequently Asked Questions (FAQ)

Q: Can the RSMF5JT750R be used as a direct replacement for the ERG-3SJ751?

A: Yes. Both resistors share identical resistance values, tolerance, composition, and operating temperature ranges. The higher power rating of the substitute (5W versus 3W) is compatible with all applications designed for the original 3W part.

Q: What is the difference in physical dimensions between these parts?

A: The ERG-3SJ751 measures 0.217" diameter × 0.591" length (5.50mm × 15.00mm). The RSMF5JT750R measures 0.236" diameter × 0.689" length (6.00mm × 17.50mm). The substitute is slightly larger due to its higher power rating. Verify PCB layout clearance before substitution.

Q: Are there compliance differences between the two parts?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and classified under the same HTSUS code (8533.21.0090).

Q: Why does the substitute have a lower temperature coefficient?

A: The RSMF5JT750R exhibits a temperature coefficient of ±200ppm/°C compared to the ERG-3SJ751's ±300ppm/°C. This represents improved stability across the operating temperature range and is a beneficial characteristic of the substitute.

Q: Is packaging format a consideration for substitution?

A: The ERG-3SJ751 is supplied in standard packaging, while the RSMF5JT750R is available in Tape & Reel (TR) format. Both are axial through-hole components suitable for manual or automated assembly. Verify your procurement and assembly process requirements.