ERG-1SJ433 Equivalent & Substitute Parts

Part Overview

The ERG-1SJ433 is a 43 kOhm ±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 industrial temperature ranges. The part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system maintenance and new design implementations.

Substiute Parts

ERG-1SJ433

Panasonic Electronic ComponentsIn Stock: 793ERG-1SJ433 Datasheet

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RSMF1JT43K0

Stackpole Electronics IncIn Stock: 795RSMF1JT43K0 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the ERG-1SJ433 is determined by the following critical parameters:

• Resistance Value: 43 kOhms (exact match required)
• Tolerance: ±5% (defines acceptable resistance variation)
• Power Rating: 1W (thermal dissipation capability)
• Composition: Metal Oxide Film (electrical characteristics and stability)
• Package Type: Axial (mechanical form factor and PCB compatibility)
• Features: Flame Proof, Safety (regulatory and safety requirements)
• Compliance: ROHS3 Compliant, REACH Unaffected (environmental and regulatory standards)

The RSMF1JT43K0 from Stackpole Electronics Inc meets all critical substitution criteria, with identical resistance, tolerance, power rating, composition, and package type. Both parts maintain ROHS3 compliance and REACH unaffected status.

Parameter Comparison

Engineering Selection Recommendations

The RSMF1JT43K0 is a direct functional equivalent for the obsolete ERG-1SJ433. Both parts satisfy identical electrical specifications: 43 kOhm resistance, ±5% tolerance, 1W power rating, and metal oxide film composition with flame-proof and safety features. Both maintain ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements.

The RSMF1JT43K0 offers improved temperature coefficient stability (±200ppm/°C versus ±350ppm/°C), resulting in superior long-term resistance stability. The ERG-1SJ433 supports a wider maximum operating temperature (235°C versus 200°C), which may be relevant for specific high-temperature applications. Physical dimensions differ slightly in diameter (3.20mm versus 2.80mm), requiring verification of PCB layout constraints in space-critical applications.

The RSMF1JT43K0 is actively manufactured and available in standard packaging (Tape & Reel), ensuring supply chain continuity and cost-effective procurement compared to the obsolete ERG-1SJ433.

Frequently Asked Questions (FAQ)

Q: Can RSMF1JT43K0 directly replace ERG-1SJ433 in existing designs?

A: Yes. Both parts share identical electrical specifications: 43 kOhm resistance, ±5% tolerance, 1W power rating, metal oxide film composition, and axial package type. Both are ROHS3 compliant and REACH unaffected. Verification of PCB layout is required due to minor physical diameter differences (3.20mm versus 2.80mm).

Q: What is the difference in temperature coefficient between these parts?

A: The ERG-1SJ433 has a temperature coefficient of ±350ppm/°C, while the RSMF1JT43K0 has ±200ppm/°C. The RSMF1JT43K0 exhibits superior resistance stability across temperature variations, making it preferable for precision applications.

Q: Are there operating temperature limitations when substituting?

A: The ERG-1SJ433 operates from -55°C to 235°C, while the RSMF1JT43K0 operates from -55°C to 200°C. If your application requires operation above 200°C, the ERG-1SJ433 specification must be maintained. For applications within -55°C to 200°C, both parts are equivalent.

Q: What packaging differences exist between these parts?

A: The ERG-1SJ433 is supplied in standard packaging, while the RSMF1JT43K0 is supplied in Tape & Reel (TR) format. Both use identical axial through-hole package types. Physical dimensions differ slightly: ERG-1SJ433 is 0.110" diameter, RSMF1JT43K0 is 0.126" diameter. PCB layout verification is necessary for space-constrained designs.

Q: Why is the ERG-1SJ433 classified as obsolete?

A: The ERG-1SJ433 is no longer actively manufactured by Panasonic Electronic Components. The RSMF1JT43K0 from Stackpole Electronics Inc is the recommended active alternative, ensuring long-term supply availability and design continuity.

Q: Are both parts compliant with current environmental regulations?

A: Yes. Both the ERG-1SJ433 and RSMF1JT43K0 are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing and use.