CB7JB33R0 Equivalent & Substitute Parts

Part Overview

The CB7JB33R0 is a 33 Ohm, 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 825 units in stock. Substitute parts may be required due to supply constraints, regional availability, or inventory management across multiple manufacturing facilities.

Substiute Parts

CB7JB33R0

Stackpole Electronics IncIn Stock: 912CB7JB33R0 Datasheet

Current PartRFQ

SQPW733RJ

TE Connectivity Passive ProductIn Stock: 2804SQPW733RJ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CB7JB33R0 is determined by the following critical parameters:

• Resistance value: 33 Ohms (exact match required)
• Tolerance: ±5% (exact match required)
• Power rating: 7W (exact match required)
• Composition: Wirewound (exact match required)
• Package: Axial through-hole (exact match required)
• Features: Flame Proof, Moisture Resistant, Safety (exact match required)
• RoHS compliance: ROHS3 Compliant (minimum requirement)

The SQPW733RJ meets all substitution criteria and is classified as a manufacturer-recommended equivalent.

Parameter Comparison

Engineering Selection Recommendations

Both CB7JB33R0 and SQPW733RJ are active production components with ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements. Selection between these parts should be based on:

• Availability and lead time from respective suppliers
• Physical dimensions: The CB7JB33R0 has a square cross-section (9.50mm), while SQPW733RJ has a rectangular cross-section (10.00mm x 9.00mm). PCB layout constraints may favor one geometry over the other.
• Operating temperature ceiling: CB7JB33R0 operates to 275°C versus SQPW733RJ to 250°C. Applications requiring operation above 250°C require the CB7JB33R0.
• Temperature coefficient stability: CB7JB33R0 offers ±200ppm/°C versus SQPW733RJ at ±300ppm/°C. Precision applications may benefit from the tighter coefficient of the CB7JB33R0.

Frequently Asked Questions (FAQ)

Q: Can SQPW733RJ be used as a direct replacement for CB7JB33R0?

A: Yes, SQPW733RJ is a manufacturer-recommended equivalent. Both parts share identical electrical specifications (33 Ohms, ±5%, 7W, wirewound) and safety features. Physical dimensions differ slightly; verify PCB layout compatibility before substitution.

Q: What are the key differences between these parts?

A: The primary differences are temperature coefficient (±200ppm/°C vs ±300ppm/°C), maximum operating temperature (275°C vs 250°C), and cross-sectional geometry (square vs rectangular). All other electrical and safety parameters are identical.

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

A: Both parts operate from -55°C to their respective maximum temperatures. CB7JB33R0 extends to 275°C, while SQPW733RJ reaches 250°C. Application requirements above 250°C necessitate CB7JB33R0.

Q: Do physical dimension differences affect PCB design?

A: Yes. CB7JB33R0 measures 9.50mm square in cross-section, while SQPW733RJ measures 10.00mm x 9.00mm rectangular. Verify hole spacing and component clearance on your PCB layout before substitution.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both CB7JB33R0 and SQPW733RJ are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.