CZRQR33VB-HF Zener Diode Equivalent & Substitute Parts

Part Overview

The CZRQR33VB-HF is a 33 V Zener diode manufactured by Comchip Technology, rated for 125 mW power dissipation in a surface mount 0402 package. This component is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. Substitute parts must maintain the 33 V nominal Zener voltage while accommodating variations in tolerance, power rating, and package specifications within acceptable engineering parameters.

Substiute Parts

CZRQR33VB-HF

Comchip TechnologyIn Stock: 875CZRQR33VB-HF Datasheet

Current PartRFQ

CZRQC33VB-HF

Comchip TechnologyIn Stock: 855CZRQC33VB-HF Datasheet

MFR RecommendedRFQ

BZX884-B33,315

Nexperia USA Inc.In Stock: 25282BZX884-B33,315 Datasheet

MFR RecommendedRFQ

BZX884-C33,315

Nexperia USA Inc.In Stock: 807BZX884-C33,315 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CZRQR33VB-HF is determined by the following critical parameters:

Primary Matching Criteria:

• Nominal Zener voltage of 33 V (exact match required)
• Tolerance range compatibility (±2% to ±5% acceptable)
• Power rating equal to or greater than 125 mW
• Surface mount technology
• Operating temperature range encompassing -55°C to 125°C minimum

Secondary Compatibility Factors:

• Impedance (Zzt) within 80–88 Ohms range
• Reverse leakage current specifications
• Forward voltage characteristics
• RoHS3 compliance and MSL rating

Two substitute categories are identified:

Category 1: Direct Package Equivalent CZRQC33VB-HF maintains identical 0402 package geometry and 125 mW power rating with active product status.

Category 2: Enhanced Performance Alternative BZX884-B33,315 and BZX884-C33,315 provide increased power dissipation (250 mW) in SOD-882 package with automotive-grade qualification (AEC-Q100) and extended temperature range (-65°C to 150°C).

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Identical Form Factor): CZRQC33VB-HF is the primary substitute for CZRQR33VB-HF. Both components share identical 0402 package geometry, 125 mW power rating, and operating temperature range. CZRQC33VB-HF maintains active product status with ROHS3 compliance. Tolerance variation (±2.48% versus ±2%) remains within acceptable engineering margins for most 33 V Zener applications.

For Enhanced Reliability Applications: BZX884-B33,315 and BZX884-C33,315 provide increased power dissipation capacity (250 mW) and extended operating temperature range (-65°C to 150°C). Both parts carry AEC-Q100 automotive qualification. Selection between these two depends on tolerance requirements: BZX884-B33,315 offers ±2% tolerance matching the original specification, while BZX884-C33,315 provides ±5% tolerance at lower cost.

Package Consideration: BZX884 series components utilize SOD-882 package (DFN1006-2) rather than 0402. PCB layout modifications are required for this substitution. Verify board space availability and thermal management requirements before selection.

Compliance Verification: All substitute parts maintain ROHS3 compliance and MSL-1 (unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can CZRQC33VB-HF directly replace CZRQR33VB-HF without PCB modifications?

A: Yes. CZRQC33VB-HF is a direct pin-for-pin and footprint-compatible substitute. Both components use identical 0402 package geometry and require no PCB layout changes. The tolerance difference (±2.48% versus ±2%) is within acceptable engineering margins for Zener diode applications.

Q: What is the primary reason for substituting the CZRQR33VB-HF?

A: CZRQR33VB-HF is classified as obsolete. CZRQC33VB-HF is the recommended active equivalent from the same manufacturer, ensuring continued supply chain availability and manufacturing support.

Q: Can BZX884-B33,315 or BZX884-C33,315 be used in place of CZRQR33VB-HF?

A: Yes, with PCB modifications. Both BZX884 parts maintain the 33 V nominal Zener voltage and provide superior performance characteristics (250 mW power rating, extended temperature range, AEC-Q100 qualification). However, the SOD-882 package differs from the 0402 package, requiring footprint redesign on the PCB.

Q: What is the difference between BZX884-B33,315 and BZX884-C33,315?

A: Both parts share identical electrical performance and package specifications. The primary difference is tolerance: BZX884-B33,315 specifies ±2% tolerance, matching the original CZRQR33VB-HF, while BZX884-C33,315 specifies ±5% tolerance. Select BZX884-B33,315 for applications requiring tighter voltage regulation; select BZX884-C33,315 for cost-sensitive applications where ±5% tolerance is acceptable.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. CZRQC33VB-HF, BZX884-B33,315, and BZX884-C33,315 are all ROHS3 compliant with MSL-1 (unlimited) moisture sensitivity rating, meeting standard environmental and manufacturing requirements.

Q: What is the operating temperature range difference between the main part and BZX884 substitutes?

A: CZRQR33VB-HF and CZRQC33VB-HF operate from -55°C to 125°C. BZX884-B33,315 and BZX884-C33,315 extend this range to -65°C to 150°C, providing enhanced performance in extreme temperature environments. Applications limited to -55°C to 125°C operation do not require this extended range.

Q: Is automotive qualification required for my application?

A: BZX884-B33,315 and BZX884-C33,315 carry AEC-Q100 automotive qualification. If your application requires automotive-grade components, these substitutes are appropriate. For non-automotive applications, CZRQC33VB-HF provides equivalent functionality without automotive certification overhead.