Equivalent & Substitute Parts for CZRQR36VB-HF

Part Overview

The CZRQR36VB-HF is a 36 V Zener diode manufactured by Comchip Technology, rated at 125 mW power dissipation with ±2% tolerance. This component is packaged in 0402 (1006 Metric) surface mount format with SOD-923F supplier designation. The part is currently classified as obsolete, necessitating identification of active equivalent and substitute components that maintain functional compatibility within system designs. Substitute parts must satisfy the core electrical parameters: 36 V nominal Zener voltage, surface mount configuration, and compatible thermal operating range.

Substiute Parts

CZRQR36VB-HF

Comchip TechnologyIn Stock: 823CZRQR36VB-HF Datasheet

Current PartRFQ

CZRQC36VB-HF

Comchip TechnologyIn Stock: 838CZRQC36VB-HF Datasheet

MFR RecommendedRFQ

BZX884-B36,315

Nexperia USA Inc.In Stock: 1123BZX884-B36,315 Datasheet

MFR RecommendedRFQ

BZX884-C36,315

Nexperia USA Inc.In Stock: 975BZX884-C36,315 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the CZRQR36VB-HF is based on the following criteria:

Primary Matching Criteria:

• Voltage - Zener (Nom): 36 V (exact match required)
• Mounting Type: Surface Mount (required)
• RoHS Status: ROHS3 Compliant (required)

Secondary Compatibility Criteria:

• Power - Max: Equal to or greater than 125 mW
• Tolerance: ±2% to ±5% acceptable
• Impedance (Max): 90 Ohms to 95 Ohms range
• Operating Temperature: Minimum -55°C to maximum 125°C or extended range

Package Considerations:

• CZRQC36VB-HF: Identical 0402 (1006 Metric) package; direct footprint replacement
• BZX884-B36,315 and BZX884-C36,315: SOD-882 package (DFN1006-2); different physical footprint requiring board layout verification

All substitute parts listed maintain the 36 V Zener voltage specification and surface mount assembly compatibility. Differences in power rating, tolerance, and package format are documented to enable informed selection based on circuit requirements and board constraints.

Parameter Comparison

Engineering Selection Recommendations

CZRQC36VB-HF (Comchip Technology)

This substitute is the primary recommendation for direct replacement of the obsolete CZRQR36VB-HF. Both components share identical electrical specifications (36 V Zener voltage, 125 mW power rating, 95 Ohms impedance) and package format (0402/SOD-923F). The CZRQC36VB-HF is currently in active production status with 739 units in stock. Tolerance specification increases from ±2% to ±2.5%, which remains within acceptable circuit design margins for most applications. No board layout modifications are required for this substitution.

BZX884-B36,315 (Nexperia USA Inc.)

This substitute provides enhanced thermal performance with 250 mW power rating (double the original specification) and extended operating temperature range (-65°C to 150°C). The component carries automotive-grade qualification (AEC-Q100) and is manufactured by Nexperia, a tier-one semiconductor supplier. Impedance specification improves to 90 Ohms maximum. The critical difference is package format: SOD-882 (DFN1006-2) versus the original 0402 (SOD-923F). Board layout redesign is required to accommodate the different footprint. This option is suitable for applications requiring automotive qualification or enhanced thermal headroom.

BZX884-C36,315 (Nexperia USA Inc.)

This substitute offers identical thermal and qualification benefits as the BZX884-B36,315 with the same 250 mW power rating and AEC-Q100 automotive qualification. The primary distinction is tolerance specification at ±5%, which is wider than the original ±2%. This component is appropriate for applications where tolerance relaxation is acceptable and automotive-grade components are required. Like the BZX884-B36,315, this part requires board layout modification due to SOD-882 package format.

Selection Criteria Summary:

• Identical footprint requirement: Select CZRQC36VB-HF
• Automotive qualification required: Select BZX884-B36,315 (±2% tolerance) or BZX884-C36,315 (±5% tolerance)
• Enhanced thermal margin needed: Select BZX884-B36,315 or BZX884-C36,315 (250 mW rating)
• Extended temperature range required: Select BZX884-B36,315 or BZX884-C36,315 (-65°C to 150°C)

All substitute parts maintain ROHS3 compliance and surface mount assembly compatibility.

Frequently Asked Questions (FAQ)

Q: Can CZRQC36VB-HF be used as a direct replacement for CZRQR36VB-HF without board modifications?

A: Yes. Both components use identical 0402 (1006 Metric) package format with SOD-923F supplier designation. The footprint, pin spacing, and mounting requirements are identical. No board layout changes are necessary. The tolerance difference (±2.5% versus ±2%) is within acceptable design margins for Zener diode applications.

Q: What is the primary difference between CZRQC36VB-HF and the Nexperia BZX884 series?

A: The Comchip CZRQC36VB-HF maintains the original 0402 package format and 125 mW power rating. The Nexperia BZX884-B36,315 and BZX884-C36,315 use SOD-882 package format (DFN1006-2) and provide doubled power rating (250 mW). Package format differences require board layout verification and potential redesign.

Q: Are the Nexperia BZX884-B36,315 and BZX884-C36,315 interchangeable with each other?

A: Both components share identical package format (SOD-882/DFN1006-2), power rating (250 mW), impedance (90 Ohms), and operating temperature range (-65°C to 150°C). The primary difference is tolerance specification: BZX884-B36,315 is ±2%, while BZX884-C36,315 is ±5%. Selection depends on circuit tolerance requirements. Both carry AEC-Q100 automotive qualification.

Q: Why do the Nexperia parts have lower reverse leakage current (50 nA) compared to Comchip parts (100 nA)?

A: Reverse leakage current is measured at different reference voltages: Nexperia specifies 50 nA @ 25.2 V, while Comchip specifies 100 nA @ 27 V. These measurements are not directly comparable due to voltage differences. Both values are within acceptable ranges for 36 V Zener diode applications and do not affect substitution compatibility.

Q: Is automotive qualification (AEC-Q100) required for my application?

A: Automotive qualification is required only for components used in automotive systems or applications subject to automotive industry standards. If your application does not require automotive-grade components, the Comchip CZRQC36VB-HF is a suitable substitute. If automotive qualification is mandatory, select BZX884-B36,315 or BZX884-C36,315.

Q: Can I use a 250 mW rated part (BZX884 series) in place of a 125 mW rated part (CZRQR36VB-HF)?

A: Yes. Higher power rating provides additional thermal margin and does not create compatibility issues. The circuit will operate identically; the substitute component simply has greater thermal capacity. This is a conservative substitution approach suitable for applications requiring enhanced reliability or thermal headroom.

Q: What is the impact of tolerance differences (±2%, ±2.5%, ±5%) on circuit performance?

A: Zener voltage tolerance affects the precision of voltage regulation. For a 36 V Zener: ±2% tolerance = 35.28 V to 36.72 V; ±2.5% tolerance = 35.1 V to 36.9 V; ±5% tolerance = 34.2 V to 37.8 V. Select tolerance based on circuit voltage regulation requirements. Wider tolerance substitutes are acceptable if circuit design accommodates the voltage variation range.

Q: Must I redesign the board layout to use BZX884-B36,315 or BZX884-C36,315?

A: Yes. The BZX884 series uses SOD-882 package format (DFN1006-2), which has different physical dimensions and footprint compared to the original 0402 (SOD-923F) package. Board layout verification and potential redesign are required. If board layout modification is not feasible, use CZRQC36VB-HF instead.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. CZRQC36VB-HF, BZX884-B36,315, and BZX884-C36,315 are all ROHS3 compliant. All substitute parts meet current environmental and regulatory requirements for electronic component manufacturing and use.