CB10JB3R90 Equivalent & Substitute Parts

Part Overview

The CB10JB3R90 is a 3.9 Ohms ±5% 10W through-hole axial wirewound resistor manufactured by Stackpole Electronics Inc. This component is designed for applications requiring flame-proof and moisture-resistant performance in high-power dissipation circuits. The part maintains active product status with 896 units currently in stock. Substitute parts are identified when equivalent electrical specifications, mechanical compatibility, and regulatory compliance can be maintained across alternative manufacturers.

Substiute Parts

CB10JB3R90

Stackpole Electronics IncIn Stock: 918CB10JB3R90 Datasheet

Current PartRFQ

SQPW103R9J

TE Connectivity Passive ProductIn Stock: 3443SQPW103R9J Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CB10JB3R90 are qualified based on the following critical parameters:

• Resistance value: 3.9 Ohms (exact match required)
• Tolerance: ±5% (exact match required)
• Power rating: 10W (exact match required)
• Composition: Wirewound (exact match required)
• Package type: Axial (exact match required)
• Features: Flame Proof, Moisture Resistant, Safety (all required)
• Regulatory compliance: ROHS3 Compliant, REACH Unaffected, EAR99 classification

The SQPW103R9J from TE Connectivity Passive Product meets all mandatory electrical and mechanical parameters. Variations in temperature coefficient and maximum operating temperature do not preclude substitution when the application operating conditions fall within the substitute part's rated range.

Parameter Comparison

Engineering Selection Recommendations

The SQPW103R9J qualifies as a direct substitute for the CB10JB3R90 based on matching electrical specifications, mechanical compatibility, and regulatory compliance. Both parts are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export control purposes.

Selection between the two parts should be based on application-specific requirements:

• If operating temperatures consistently exceed 250°C, the CB10JB3R90 with its extended temperature range to 275°C is required.
• If temperature coefficient stability below ±200ppm/°C is critical, the CB10JB3R90 is the preferred choice.
• For applications operating within -55°C to 250°C and tolerating ±300ppm/°C temperature coefficient, the SQPW103R9J provides equivalent performance with higher inventory availability (3401 units in stock versus 896 units).

Both parts maintain active product status and are suitable for new designs and production applications.

Frequently Asked Questions (FAQ)

Q: Can SQPW103R9J replace CB10JB3R90 in all applications?

A: The SQPW103R9J is electrically and mechanically equivalent for applications operating within -55°C to 250°C. If your application requires operation above 250°C or demands temperature coefficient stability better than ±300ppm/°C, the CB10JB3R90 is required.

Q: Are the physical dimensions compatible?

A: Both parts use axial package configuration. The CB10JB3R90 has a 0.374" square cross-section, while the SQPW103R9J has a 0.394" x 0.354" rectangular cross-section. Both are 1.890" in length. Verify PCB layout and mechanical clearances for your specific application.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both CB10JB3R90 and SQPW103R9J are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export control.

Q: What is the difference in temperature coefficient?

A: The CB10JB3R90 has a temperature coefficient of ±200ppm/°C, while the SQPW103R9J is ±300ppm/°C. This means the SQPW103R9J's resistance value will drift slightly more with temperature changes. For precision applications with tight tolerance requirements across temperature ranges, the CB10JB3R90 is preferred.

Q: Which part should I choose for new designs?

A: Both parts are active and suitable for new designs. Consider SQPW103R9J if higher inventory availability is beneficial for supply chain planning. Choose CB10JB3R90 if extended temperature range or superior temperature coefficient stability is required by your application specifications.