CB7JB8R20 Equivalent & Substitute Parts

Part Overview

The CB7JB8R20 is an 8.2 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. The part is currently active in production with 970 units in stock. Substitute parts are identified when equivalent electrical specifications, mechanical compatibility, and regulatory compliance can be maintained across alternative manufacturers.

Substiute Parts

CB7JB8R20

Stackpole Electronics IncIn Stock: 998CB7JB8R20 Datasheet

Current PartRFQ

SQPW78R2J

TE Connectivity Passive ProductIn Stock: 1472SQPW78R2J Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CB7JB8R20 is determined by the following critical parameters:

• Resistance value: 8.2 Ohms (exact match required)
• Tolerance: ±5% (exact match required)
• Power rating: 7W (exact match required)
• Package: Axial through-hole (exact match required)
• Composition: Wirewound (exact match required)
• Features: Flame proof and moisture resistant construction (required)
• Regulatory compliance: ROHS3 compliant (required)

The identified substitute SQPW78R2J from TE Connectivity Passive Product meets all critical electrical and mechanical parameters, enabling direct functional replacement in applications requiring 8.2 Ohm, 7W axial wirewound resistors.

Parameter Comparison

Engineering Selection Recommendations

Both CB7JB8R20 and SQPW78R2J are active production components with ROHS3 compliance and REACH unaffected status. Selection between these parts should be based on:

• Application temperature requirements: CB7JB8R20 supports operation to 275°C, while SQPW78R2J is rated to 250°C
• Temperature stability requirements: CB7JB8R20 offers ±200ppm/°C coefficient; SQPW78R2J provides ±300ppm/°C
• Supply chain availability: SQPW78R2J has higher inventory (1416 units) compared to CB7JB8R20 (970 units)
• Physical dimensions: CB7JB8R20 is 0.374" square; SQPW78R2J is 0.394" x 0.354" rectangular

Frequently Asked Questions (FAQ)

Q: Can SQPW78R2J directly replace CB7JB8R20 in all applications?

A: Direct replacement is possible for applications operating within -55°C to 250°C. Applications requiring operation above 250°C must use CB7JB8R20. Both parts maintain identical resistance, tolerance, power rating, and safety features.

Q: What are the physical dimension differences?

A: CB7JB8R20 has a square cross-section of 0.374" with 1.378" length. SQPW78R2J has a rectangular cross-section of 0.394" x 0.354" with the same 1.378" length. PCB layout and mounting clearances must accommodate these dimensional variations.

Q: Are both parts RoHS compliant?

A: Yes, both CB7JB8R20 and SQPW78R2J are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component manufacturing and distribution.

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

A: CB7JB8R20 has a temperature coefficient of ±200ppm/°C, while SQPW78R2J is ±300ppm/°C. Applications requiring tighter resistance stability across temperature variations should prioritize CB7JB8R20.

Q: Are both parts suitable for high-temperature applications?

A: CB7JB8R20 is rated to 275°C and is suitable for extended high-temperature operation. SQPW78R2J is rated to 250°C. Selection depends on specific application temperature requirements.