BZX55C33-TAP Equivalent & Substitute Parts

Part Overview

The BZX55C33-TAP is a Zener diode rated at 33 V nominal voltage with 500 mW maximum power dissipation in a DO-35 through-hole package. Manufactured by Vishay General Semiconductor - Diodes Division, this component is classified as Active product status and carries AEC-Q101 automotive qualification. The BZX55C33-TAP operates across a temperature range of -65°C to 175°C and maintains ±5% tolerance on its nominal Zener voltage. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter ranges, allowing for design flexibility and supply chain optimization.

Substiute Parts

BZX55C33-TAP

Vishay General Semiconductor - Diodes DivisionIn Stock: 2304BZX55C33-TAP Datasheet

Current PartRFQ

BZX55B33-TAP

Vishay General Semiconductor - Diodes DivisionIn Stock: 31008BZX55B33-TAP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BZX55C33-TAP is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

• Nominal Zener voltage of 33 V
• Maximum power dissipation of 500 mW
• Maximum impedance of 80 Ohms
• Reverse leakage current of 100 nA @ 24 V
• Forward voltage of 1.5 V maximum @ 200 mA
• Operating temperature range of -65°C to 175°C

Mechanical & Compliance Criteria:

• DO-204AH (DO-35) axial through-hole package
• Automotive grade classification
• AEC-Q101 qualification
• ROHS3 compliance
• Moisture Sensitivity Level 1 (Unlimited)

Substitute parts must match all electrical parameters and maintain identical package, mounting, and qualification specifications. Tolerance variations are permitted only when the substitute part's tolerance range remains within the functional requirements of the application circuit.

Parameter Comparison

Engineering Selection Recommendations

The BZX55B33-TAP qualifies as a direct substitute for the BZX55C33-TAP based on complete electrical and mechanical parameter equivalence. Both components are manufactured by Vishay General Semiconductor - Diodes Division, carry Active product status, and maintain identical AEC-Q101 automotive qualification and ROHS3 compliance.

The BZX55B33-TAP offers improved tolerance specification at ±2% compared to the ±5% tolerance of the BZX55C33-TAP. This tighter tolerance provides enhanced voltage regulation accuracy in applications where Zener voltage precision is critical. All other electrical characteristics, including power rating, impedance, leakage current, and forward voltage, remain identical.

Both parts are housed in the DO-204AH (DO-35) axial through-hole package and operate across the identical temperature range of -65°C to 175°C. Mechanical compatibility is complete, requiring no circuit board layout modifications or thermal management adjustments.

Selection between these parts depends on application requirements for voltage tolerance and component availability. The BZX55B33-TAP is suitable for applications requiring tighter voltage regulation, while the BZX55C33-TAP remains appropriate for applications with standard tolerance requirements.

Frequently Asked Questions (FAQ)

Q: Can the BZX55B33-TAP replace the BZX55C33-TAP in existing designs?

A: Yes. The BZX55B33-TAP is electrically and mechanically equivalent to the BZX55C33-TAP. All critical parameters including nominal voltage, power rating, impedance, leakage current, and forward voltage are identical. Both components use the DO-35 through-hole package and carry identical automotive qualification.

Q: What is the difference between the BZX55C33-TAP and BZX55B33-TAP?

A: The primary difference is voltage tolerance. The BZX55C33-TAP maintains ±5% tolerance on its 33 V nominal voltage, while the BZX55B33-TAP maintains ±2% tolerance. The tighter tolerance of the BZX55B33-TAP provides improved voltage regulation accuracy. All other electrical and mechanical specifications are identical.

Q: Are both parts suitable for automotive applications?

A: Yes. Both the BZX55C33-TAP and BZX55B33-TAP carry Automotive grade classification and AEC-Q101 qualification, confirming suitability for automotive circuit applications.

Q: Do these parts require different PCB footprints?

A: No. Both components use the DO-204AH (DO-35) axial through-hole package with identical mechanical dimensions and pin configuration. No PCB layout modifications are required when substituting between these parts.

Q: What is the operating temperature range for both parts?

A: Both the BZX55C33-TAP and BZX55B33-TAP operate across the temperature range of -65°C to 175°C, providing identical thermal performance characteristics.

Q: Are both parts RoHS compliant?

A: Yes. Both the BZX55C33-TAP and BZX55B33-TAP are ROHS3 compliant and carry Moisture Sensitivity Level 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: Which part should be selected for voltage regulation applications?

A: The BZX55B33-TAP is preferred for applications requiring precise voltage regulation due to its ±2% tolerance specification. The BZX55C33-TAP is suitable for applications with standard tolerance requirements at ±5%.