ERG-1SJ333 Equivalent & Substitute Parts

Part Overview

The ERG-1SJ333 is a 33 kOhms ±5% 1W 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 performance across industrial temperature ranges. The part is currently obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications.

Substiute Parts

ERG-1SJ333

Panasonic Electronic ComponentsIn Stock: 1050ERG-1SJ333 Datasheet

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RSMF1JB33K0

Stackpole Electronics IncIn Stock: 1073RSMF1JB33K0 Datasheet

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RSMF1JT33K0

Stackpole Electronics IncIn Stock: 1180RSMF1JT33K0 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the ERG-1SJ333 is determined by strict equivalence across the following parameters:

• Resistance value: 33 kOhms
• Tolerance: ±5%
• Power rating: 1W
• Composition: Metal Oxide Film
• Package: Axial through-hole
• Features: Flame Proof, Safety characteristics
• Regulatory compliance: ROHS3 Compliant

The substitute parts identified—RSMF1JB33K0 and RSMF1JT33K0 from Stackpole Electronics Inc—meet all electrical and mechanical requirements. Both maintain the same resistance, tolerance, power rating, and composition. Differences in temperature coefficient and maximum operating temperature are within acceptable ranges for most applications. The primary distinction between substitutes is packaging format: bulk versus tape & reel.

Parameter Comparison

Engineering Selection Recommendations

Both RSMF1JB33K0 and RSMF1JT33K0 are active products from Stackpole Electronics Inc and serve as direct functional equivalents to the obsolete ERG-1SJ333. Selection between the two substitutes depends on procurement and assembly requirements:

RSMF1JB33K0 is supplied in bulk packaging, suitable for manual assembly or small-volume applications where tape & reel format is not required.

RSMF1JT33K0 is supplied in tape & reel format, optimized for automated pick-and-place assembly and high-volume production environments.

Both parts maintain ROHS3 compliance and are REACH unaffected. The Stackpole substitutes feature improved temperature coefficient stability (±200ppm/°C versus ±350ppm/°C), providing enhanced precision in temperature-sensitive applications. The maximum operating temperature of 200°C for Stackpole parts is lower than the original 235°C specification; applications requiring operation above 200°C require evaluation against specific thermal requirements.

Frequently Asked Questions (FAQ)

Q: Can RSMF1JB33K0 and RSMF1JT33K0 be used interchangeably with ERG-1SJ333?

A: Yes, both Stackpole parts are electrically and mechanically equivalent. The primary difference is packaging format. RSMF1JB33K0 is bulk; RSMF1JT33K0 is tape & reel. Selection depends on assembly method and production volume.

Q: What is the significance of the diameter difference between ERG-1SJ333 and the Stackpole substitutes?

A: The ERG-1SJ333 has a 0.110" diameter, while RSMF1JB33K0 and RSMF1JT33K0 have a 0.126" diameter. Both are standard axial through-hole packages. The larger diameter of Stackpole parts does not affect electrical performance and fits standard PCB hole spacing. Physical clearance in the application should be verified if space constraints exist.

Q: Are there temperature limitations when substituting with Stackpole parts?

A: Stackpole substitutes operate to 200°C maximum, compared to 235°C for the original ERG-1SJ333. Applications requiring sustained operation above 200°C must be evaluated against specific thermal profiles. For most industrial applications within -55°C to 200°C, the Stackpole parts are fully suitable.

Q: Do the substitutes maintain the same regulatory compliance?

A: Yes. Both RSMF1JB33K0 and RSMF1JT33K0 are ROHS3 compliant, REACH unaffected, and carry the same ECCN and HTSUS classifications as the original part.

Q: Which substitute should be selected for automated assembly?

A: RSMF1JT33K0 in tape & reel format is designed for automated pick-and-place assembly. RSMF1JB33K0 in bulk format is suitable for manual or semi-automated processes.