CB3JB56R0 Equivalent & Substitute Parts

Part Overview

The CB3JB56R0 is a 56 Ohm, 3W axial wirewound resistor manufactured by Stackpole Electronics Inc. This through-hole component features flame-proof and moisture-resistant construction with a ±5% tolerance rating. The part is currently active in production with 1,162 units in stock. Equivalent and substitute parts are identified when component availability is limited, supply chain disruptions occur, or design flexibility permits alternative sourcing from qualified manufacturers meeting identical electrical and mechanical specifications.

Substiute Parts

CB3JB56R0

Stackpole Electronics IncIn Stock: 1187CB3JB56R0 Datasheet

Current PartRFQ

PNP300JR-73-56R

YAGEOIn Stock: 4227PNP300JR-73-56R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CB3JB56R0 is determined by strict equivalence across the following critical parameters:

• Resistance value: 56 Ohms
• Tolerance: ±5%
• Power rating: 3W
• Composition: Wirewound
• Package configuration: Axial through-hole
• Termination count: 2
• Regulatory compliance: ROHS3 Compliant, REACH Unaffected

The substitute part PNP300JR-73-56R from YAGEO meets all core electrical specifications. Physical dimensions and operating temperature ranges may vary within acceptable design margins for through-hole axial components. Both parts are classified as active products with current manufacturing status and equivalent regulatory certifications.

Parameter Comparison

Engineering Selection Recommendations

Both CB3JB56R0 and PNP300JR-73-56R are active production components with ROHS3 compliance and REACH unaffected status. Selection between these parts is based on the following criteria:

The CB3JB56R0 provides a wider operating temperature range (-55°C to 275°C) and larger physical dimensions suitable for applications requiring extended thermal performance or specific board layout constraints. The PNP300JR-73-56R offers a compact form factor with reduced physical footprint while maintaining the core 56 Ohm, 3W, ±5% specification within its operating range of -40°C to 200°C. Both components satisfy identical electrical requirements and regulatory certifications for standard industrial and commercial applications.

Frequently Asked Questions (FAQ)

Q: Can PNP300JR-73-56R replace CB3JB56R0 in all applications?

A: Both parts meet identical electrical specifications (56 Ohm, 3W, ±5% tolerance, wirewound axial configuration). Substitution is valid for applications operating within the PNP300JR-73-56R temperature range of -40°C to 200°C. Applications requiring operation below -40°C or above 200°C must use the CB3JB56R0 to ensure compliance with the extended -55°C to 275°C range.

Q: What are the physical dimension differences?

A: The CB3JB56R0 measures 0.315" square by 0.866" length (8.00mm x 22.00mm). The PNP300JR-73-56R measures 0.181" diameter by 0.453" length (4.60mm x 11.50mm). The substitute part is significantly smaller and may require PCB layout verification for clearance and thermal management considerations.

Q: Are both parts RoHS compliant?

A: Yes. Both CB3JB56R0 and PNP300JR-73-56R are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the temperature coefficient difference?

A: The CB3JB56R0 specifies a temperature coefficient of ±200ppm/°C. The PNP300JR-73-56R temperature coefficient is not provided in the specification data. For applications with strict temperature stability requirements, the CB3JB56R0 is the specified reference component.

Q: Can these parts be used interchangeably in existing designs?

A: Electrical interchangeability is confirmed for the core 56 Ohm, 3W, ±5% specification. Physical dimension differences require PCB layout review. Operating temperature range compatibility must be verified against application requirements before substitution.