CB3JB2R70 Equivalent & Substitute Parts

Part Overview

The CB3JB2R70 is a 2.7 Ohm ±5% 3W axial wirewound resistor manufactured by Stackpole Electronics Inc. This through-hole component features flame-proof and moisture-resistant construction with safety-rated design, suitable for applications requiring reliable power dissipation in harsh environments. The part maintains Active product status with 918 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

CB3JB2R70

Stackpole Electronics IncIn Stock: 934CB3JB2R70 Datasheet

Current PartRFQ

PNP300JR-73-2R7

YAGEOIn Stock: 7921PNP300JR-73-2R7 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CB3JB2R70 is determined by strict equivalence across the following parameters:

• Resistance value: 2.7 Ohms
• Tolerance: ±5%
• Power rating: 3W
• Composition: Wirewound
• Package configuration: Axial through-hole
• Regulatory compliance: ROHS3 Compliant, REACH Unaffected, EAR99 classification

The PNP300JR-73-2R7 from YAGEO meets all core electrical and mechanical requirements for direct substitution. Both parts share identical resistance, tolerance, power rating, and axial package format. Compliance certifications align across both components.

Parameter Comparison

Engineering Selection Recommendations

Both the CB3JB2R70 and PNP300JR-73-2R7 maintain Active product status and full ROHS3 compliance. Selection between these components should be based on application-specific operating temperature requirements. The CB3JB2R70 supports extended temperature operation from -55°C to 275°C, while the PNP300JR-73-2R7 operates within -40°C to 200°C. For applications requiring the full temperature range of the original specification, the CB3JB2R70 remains the primary choice. The PNP300JR-73-2R7 is suitable for applications operating within its specified temperature envelope. Both components satisfy identical electrical performance, regulatory compliance, and mechanical interface requirements.

Frequently Asked Questions (FAQ)

Q: Can PNP300JR-73-2R7 be used as a direct replacement for CB3JB2R70?

A: Yes, for applications operating within -40°C to 200°C. Both components share identical resistance (2.7 Ohms), tolerance (±5%), power rating (3W), and axial package configuration. If your application requires operation below -40°C or above 200°C, the CB3JB2R70 is required.

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

A: CB3JB2R70 measures 0.315" Square x 0.866" L (8.00mm x 22.00mm). PNP300JR-73-2R7 measures 0.181" Dia x 0.453" L (4.60mm x 11.50mm). The YAGEO part is significantly smaller. Verify PCB layout compatibility before substitution.

Q: Are both parts RoHS compliant?

A: Yes. Both CB3JB2R70 and PNP300JR-73-2R7 are ROHS3 Compliant and REACH Unaffected, meeting current environmental regulations.

Q: What is the difference between "Flame Proof" and "Flame Retardant Coating"?

A: CB3JB2R70 features flame-proof construction with moisture resistance. PNP300JR-73-2R7 features flame-retardant coating. Both are safety-rated wirewound designs. Application requirements determine which feature set is necessary.

Q: Can I use PNP300JR-73-2R7 in high-temperature applications?

A: No. PNP300JR-73-2R7 operates to 200°C maximum. For applications requiring operation above 200°C, use CB3JB2R70, which is rated to 275°C.