ERG-1SJ621 Equivalent & Substitute Parts

Part Overview

The ERG-1SJ621 is a 620 Ohms ±5% 1W through-hole axial resistor manufactured by Panasonic Electronic Components. This metal oxide film resistor features flame-proof and safety characteristics, designed for applications requiring reliable performance across a wide temperature range from -55°C to 235°C. The part is currently obsolete, making equivalent substitute components necessary for ongoing production, maintenance, and repair applications.

Substiute Parts

ERG-1SJ621

Panasonic Electronic ComponentsIn Stock: 882ERG-1SJ621 Datasheet

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RSMF1JB620R

Stackpole Electronics IncIn Stock: 913RSMF1JB620R Datasheet

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RSMF1JT620R

Stackpole Electronics IncIn Stock: 1010RSMF1JT620R Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ERG-1SJ621 are qualified based on the following critical parameters:

• Resistance value: 620 Ohms (exact match required)
• Tolerance: ±5% (exact match required)
• Power rating: 1W (exact match required)
• Composition: Metal Oxide Film (exact match required)
• Package type: Axial (exact match required)
• Features: Flame Proof, Safety (exact match required)
• RoHS compliance: ROHS3 Compliant (maintained)

The substitute parts RSMF1JB620R and RSMF1JT620R, both manufactured by Stackpole Electronics Inc, meet all critical electrical and mechanical parameters. Both parts are active products with current availability, providing reliable alternatives to the obsolete ERG-1SJ621.

Parameter Comparison

Engineering Selection Recommendations

Both RSMF1JB620R and RSMF1JT620R are direct functional equivalents to the ERG-1SJ621. Selection between these two Stackpole alternatives depends on procurement and assembly requirements:

RSMF1JB620R is supplied in bulk packaging, suitable for manual assembly, repair, and low-volume applications where individual component handling is required.

RSMF1JT620R is supplied in Tape & Reel format, optimized for automated assembly processes and high-volume production environments.

Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original component. The Stackpole substitutes feature improved temperature coefficient performance (±200ppm/°C versus ±350ppm/°C), providing enhanced stability in temperature-sensitive applications. The operating temperature range of -55°C to 200°C covers the majority of industrial and commercial applications; designs requiring operation above 200°C should be evaluated for thermal margin.

Frequently Asked Questions (FAQ)

Q: Can RSMF1JB620R and RSMF1JT620R be used interchangeably with ERG-1SJ621?

A: Yes. Both Stackpole parts are electrically and mechanically equivalent. The difference is packaging format: RSMF1JB620R is bulk, RSMF1JT620R is tape & reel. Selection depends on assembly method and procurement volume.

Q: What is the difference between bulk and tape & reel packaging?

A: Bulk packaging (RSMF1JB620R) supplies loose components suitable for manual handling and small-quantity applications. Tape & Reel packaging (RSMF1JT620R) provides components on continuous tape for automated pick-and-place assembly systems.

Q: Are there physical dimension differences between the original and substitute parts?

A: Yes. The ERG-1SJ621 has a diameter of 0.110" (2.80mm), while both Stackpole substitutes have a diameter of 0.126" (3.20mm). Both maintain the same axial length of 0.354" (9.00mm). Verify PCB layout clearance before substitution.

Q: Do the substitute parts meet the same compliance standards?

A: Yes. Both RSMF1JB620R and RSMF1JT620R are ROHS3 compliant and REACH unaffected, matching the original ERG-1SJ621 compliance profile.

Q: What is the temperature coefficient difference, and does it matter?

A: The ERG-1SJ621 has ±350ppm/°C; the Stackpole substitutes have ±200ppm/°C. The lower coefficient in substitutes indicates better temperature stability. For most applications, this is an improvement. Applications with tight resistance tolerance requirements across temperature extremes should verify performance within the -55°C to 200°C operating range of the substitutes.

Q: Is the operating temperature range difference significant?

A: The ERG-1SJ621 operates to 235°C; substitutes operate to 200°C. For applications requiring operation above 200°C, the original part specification must be maintained or alternative components evaluated.