CB7JB4R70 Equivalent & Substitute Parts

Part Overview

The CB7JB4R70 is a 4.7 Ohm, 7W axial wirewound resistor manufactured by Stackpole Electronics Inc. This through-hole component features flame-proof and moisture-resistant construction with a ±5% tolerance, designed for applications requiring reliable power dissipation in harsh environments. The part maintains Active product status with 790 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

CB7JB4R70

Stackpole Electronics IncIn Stock: 838CB7JB4R70 Datasheet

Current PartRFQ

SQPW74R7J

TE Connectivity Passive ProductIn Stock: 1240SQPW74R7J Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CB7JB4R70 is determined by strict equivalence across the following parameters: resistance value (4.7 Ohms), tolerance (±5%), power rating (7W), composition (wirewound), and axial package configuration. All substitute parts must maintain the same electrical performance characteristics and physical form factor to ensure direct replacement capability. Regulatory compliance (ROHS3, REACH Unaffected, EAR99 classification) and feature parity (flame proof, moisture resistant, safety rated) are mandatory for substitution validity. Temperature coefficient and operating temperature range variations are acceptable provided the substitute part's specifications remain within or exceed the application requirements of the original component.

Parameter Comparison

Engineering Selection Recommendations

The SQPW74R7J from TE Connectivity Passive Product qualifies as a direct substitute for the CB7JB4R70. Both components share identical electrical specifications (4.7 Ohms, ±5% tolerance, 7W power rating) and equivalent mechanical form factors (axial wirewound configuration). Both parts maintain Active product status and full ROHS3 compliance with REACH Unaffected designation. The SQPW74R7J operates across a slightly narrower temperature range (-55°C to 250°C versus -55°C to 275°C) and exhibits a higher temperature coefficient (±300ppm/°C versus ±200ppm/°C); these variations remain within acceptable substitution parameters for standard industrial applications. Selection between these parts may be based on inventory availability, lead time, or established supplier relationships, as electrical and mechanical compatibility is fully maintained.

Frequently Asked Questions (FAQ)

Q: Can the SQPW74R7J replace the CB7JB4R70 in all applications?

A: The SQPW74R7J is electrically and mechanically equivalent to the CB7JB4R70 for applications operating within the -55°C to 250°C temperature range. Applications requiring operation above 250°C must retain the CB7JB4R70 due to its extended upper temperature limit of 275°C.

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

A: The CB7JB4R70 has a square cross-section of 0.374" (9.50mm), while the SQPW74R7J has a rectangular cross-section of 0.394" x 0.354" (10.00mm x 9.00mm). Both maintain the same 1.378" (35.00mm) axial length. PCB layout and mounting clearance must accommodate these dimensional variations.

Q: Are both parts suitable for moisture-sensitive environments?

A: Both the CB7JB4R70 and SQPW74R7J feature moisture-resistant construction and carry Moisture Sensitivity Level (MSL) designation as Not Applicable, confirming suitability for standard industrial moisture exposure conditions.

Q: Do both parts meet the same regulatory requirements?

A: Both parts are ROHS3 Compliant, REACH Unaffected, and classified under ECCN EAR99 with identical HTSUS code 8533.21.0080, ensuring equivalent regulatory compliance for export and domestic applications.

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

A: The CB7JB4R70 exhibits ±200ppm/°C while the SQPW74R7J exhibits ±300ppm/°C. For precision applications requiring minimal resistance drift across temperature variations, the CB7JB4R70 provides superior stability. For standard industrial applications, both coefficients are acceptable.