CB7JB2R70 Equivalent & Substitute Parts

Part Overview

The CB7JB2R70 is a 2.7 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 maintains active product status with 1133 units in current inventory. Substitute parts are identified when equivalent electrical specifications, mechanical compatibility, and regulatory compliance can be maintained across alternative manufacturers.

Substiute Parts

CB7JB2R70

Stackpole Electronics IncIn Stock: 1203CB7JB2R70 Datasheet

Current PartRFQ

SQPW72R7J

TE Connectivity Passive ProductIn Stock: 1491SQPW72R7J Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CB7JB2R70 is determined by strict equivalence across the following parameters:

• Resistance value: 2.7 Ohms
• Tolerance: ±5%
• Power rating: 7W
• Composition: Wirewound
• Package configuration: Axial through-hole
• Regulatory compliance: ROHS3 Compliant, REACH Unaffected, EAR99 classification

The SQPW72R7J from TE Connectivity Passive Product qualifies as a manufacturer-recommended substitute based on matching all primary electrical and mechanical specifications. Both parts share identical resistance, tolerance, power rating, and axial package geometry, enabling direct functional replacement in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Both CB7JB2R70 and SQPW72R7J maintain active product status and full regulatory compliance under ROHS3, REACH, and EAR99 classifications. Selection between these parts should be based on application-specific thermal requirements. The CB7JB2R70 supports operation to 275°C with a tighter temperature coefficient of ±200ppm/°C, making it suitable for high-temperature environments. The SQPW72R7J operates to 250°C with ±300ppm/°C coefficient, appropriate for standard industrial applications. Both parts are certified for flame-proof and moisture-resistant operation. Current inventory availability favors SQPW72R7J with 1408 units in stock compared to 1133 units for CB7JB2R70.

Frequently Asked Questions (FAQ)

Q: Can SQPW72R7J replace CB7JB2R70 in all applications?

A: Direct substitution is valid for applications operating within -55°C to 250°C. Applications requiring operation above 250°C must use CB7JB2R70 to maintain the specified 275°C upper limit.

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

A: CB7JB2R70 specifies ±200ppm/°C while SQPW72R7J specifies ±300ppm/°C. For precision circuits sensitive to resistance drift over temperature, CB7JB2R70 provides superior stability.

Q: Are the physical dimensions identical?

A: Both parts use axial package configuration with 1.378" length. CB7JB2R70 specifies 0.374" square cross-section (9.50mm x 35.00mm), while SQPW72R7J specifies 0.394" x 0.354" rectangular cross-section (10.00mm x 9.00mm x 35.00mm). Verify PCB layout clearances for the slightly larger rectangular profile of SQPW72R7J.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both CB7JB2R70 and SQPW72R7J are ROHS3 Compliant, REACH Unaffected, and classified as EAR99 for export control purposes.

Q: Which part should be selected for new designs?

A: Selection depends on thermal operating range requirements. For standard applications within 250°C, either part is acceptable. For designs requiring extended temperature operation to 275°C, specify CB7JB2R70.