CB7JB1R00 Equivalent & Substitute Parts

Part Overview

The CB7JB1R00 is a 1 Ohm, 5% tolerance, 7W axial wirewound resistor manufactured by Stackpole Electronics Inc. This through-hole component features flame-proof and moisture-resistant construction with safety certification, designed for applications requiring reliable power dissipation in harsh environments. The part is currently active in production with 957 units in stock. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are required due to supply constraints, design flexibility, or inventory optimization.

Substiute Parts

CB7JB1R00

Stackpole Electronics IncIn Stock: 1027CB7JB1R00 Datasheet

Current PartRFQ

SQPW71R0J

TE Connectivity Passive ProductIn Stock: 2465SQPW71R0J Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CB7JB1R00 is determined by strict equivalence across the following critical parameters:

• Resistance value: 1 Ohms (exact match required)
• Tolerance: ±5% (exact match required)
• Power rating: 7W (exact match required)
• Composition: Wirewound (exact match required)
• Package: Axial through-hole (exact match required)
• Termination count: 2 (exact match required)
• Environmental features: Flame Proof, Moisture Resistant, Safety (exact match required)
• Regulatory compliance: ROHS3 Compliant (exact match required)

The substitute part SQPW71R0J meets all mandatory electrical and mechanical criteria for direct substitution. Variations in temperature coefficient and maximum operating temperature do not preclude substitution when the application operating window remains within the substitute's rated limits.

Parameter Comparison

Engineering Selection Recommendations

Both CB7JB1R00 and SQPW71R0J are active production components with ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements. Selection between these parts should be based on:

• Application temperature ceiling: If sustained operation above 250°C is required, CB7JB1R00 is the appropriate choice due to its 275°C maximum rating.
• Temperature coefficient stability: CB7JB1R00 offers superior temperature stability at ±200ppm/°C versus SQPW71R0J at ±300ppm/°C. Applications with tight resistance tolerance requirements over temperature should prioritize CB7JB1R00.
• Availability and lead time: SQPW71R0J maintains higher inventory (2374 units) compared to CB7JB1R00 (957 units), providing supply chain flexibility.
• Physical dimensions: CB7JB1R00 is 0.374" square × 1.378" length; SQPW71R0J is 0.394" × 0.354" rectangular × 1.378" length. PCB layout constraints may favor one geometry over the other.

Frequently Asked Questions (FAQ)

Q: Can SQPW71R0J replace CB7JB1R00 in all applications?

A: SQPW71R0J is electrically and mechanically compatible for applications where the operating temperature does not exceed 250°C and the temperature coefficient variation of ±100ppm/°C is acceptable. If your circuit operates above 250°C or requires the tighter temperature coefficient of CB7JB1R00, direct substitution is not appropriate.

Q: What are the physical dimension differences between these parts?

A: CB7JB1R00 has a square cross-section (0.374" × 0.374"), while SQPW71R0J has a rectangular cross-section (0.394" × 0.354"). Both are 1.378" in length. Verify PCB footprint and mounting clearances before substitution.

Q: Are both parts RoHS compliant?

A: Yes, both CB7JB1R00 and SQPW71R0J are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.

Q: What is the significance of the temperature coefficient difference?

A: Temperature coefficient indicates resistance change per degree Celsius. CB7JB1R00 at ±200ppm/°C exhibits less resistance drift over temperature than SQPW71R0J at ±300ppm/°C. For precision applications, CB7JB1R00 provides better stability.

Q: Which part should I select for new designs?

A: For new designs, either part is acceptable if application temperature remains within -55°C to 250°C and temperature coefficient tolerance of ±300ppm/°C is acceptable. Verify specific circuit requirements before final selection.