ERG-1SJ821 Equivalent & Substitute Parts

Part Overview

The ERG-1SJ821 is an 820 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 product is currently obsolete, making equivalent substitute parts necessary for ongoing design support, maintenance, and production continuity.

Substiute Parts

ERG-1SJ821

Panasonic Electronic ComponentsIn Stock: 1130ERG-1SJ821 Datasheet

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RSMF1JB820R

Stackpole Electronics IncIn Stock: 749RSMF1JB820R Datasheet

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RSMF1JT820R

Stackpole Electronics IncIn Stock: 760RSMF1JT820R Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ERG-1SJ821 are qualified based on the following critical parameters:

• Resistance Value: Must be 820 Ohms
• Tolerance: Must be ±5%
• Power Rating: Must be 1W
• Composition: Must be Metal Oxide Film
• Package Type: Must be Axial
• Features: Must include Flame Proof and Safety characteristics
• Compliance: Must maintain ROHS3 compliance

The substitute parts RSMF1JB820R and RSMF1JT820R, both manufactured by Stackpole Electronics Inc, meet all critical electrical and mechanical parameters. These parts are functionally equivalent to the obsolete ERG-1SJ821 and are suitable for direct replacement in existing designs.

Parameter Comparison

Engineering Selection Recommendations

Both RSMF1JB820R and RSMF1JT820R are active, production-grade alternatives to the obsolete ERG-1SJ821. Selection between these two Stackpole parts depends on packaging requirements:

• RSMF1JB820R: Supplied in Bulk packaging, suitable for manual assembly, prototyping, and low-volume applications.
• RSMF1JT820R: Supplied in Tape & Reel (TR) packaging, optimized for automated assembly and high-volume production environments.

Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with current environmental standards. The Stackpole substitutes feature a lower temperature coefficient (±200ppm/°C versus ±350ppm/°C) and operate to 200°C maximum, which is acceptable for most applications within the -55°C to 200°C range. Applications requiring operation above 200°C should be evaluated for thermal performance impact.

Frequently Asked Questions (FAQ)

Q: Can RSMF1JB820R and RSMF1JT820R be used interchangeably with ERG-1SJ821?

A: Yes. Both Stackpole parts are electrically and mechanically equivalent. The primary difference is packaging format: Bulk versus Tape & Reel. Selection depends on assembly method and production volume.

Q: What is the difference between RSMF1JB820R and RSMF1JT820R?

A: Both parts are identical in electrical specifications and physical dimensions. RSMF1JB820R is supplied in Bulk packaging for manual or small-batch assembly. RSMF1JT820R is supplied in Tape & Reel format for automated pick-and-place assembly systems.

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

A: Yes. The ERG-1SJ821 has a diameter of 0.110" (2.80mm), while both Stackpole substitutes have a diameter of 0.126" (3.20mm). The axial length remains 0.354" (9.00mm) for all three parts. Verify PCB pad spacing and component clearance before substitution.

Q: What is the operating temperature difference, and does it affect compatibility?

A: The ERG-1SJ821 operates to 235°C maximum, while Stackpole substitutes operate to 200°C maximum. For applications operating below 200°C, this difference is not a limiting factor. Applications requiring operation above 200°C require thermal performance evaluation.

Q: Are both substitute parts RoHS compliant?

A: Yes. Both RSMF1JB820R and RSMF1JT820R are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: Which substitute part should I select for new designs?

A: For automated assembly environments, select RSMF1JT820R (Tape & Reel). For manual assembly, prototyping, or low-volume production, select RSMF1JB820R (Bulk). Both are active production parts with equivalent electrical performance.