CZRER20VB-HF Zener Diode Equivalent & Substitute Parts

Part Overview

The CZRER20VB-HF is a 20 V Zener diode manufactured by Comchip Technology, rated for 150 mW power dissipation in a 0503/SOD-723F surface mount package. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement continuity. The substitute part maintains identical electrical specifications while offering improved product status and availability.

Substiute Parts

CZRER20VB-HF

Comchip TechnologyIn Stock: 886CZRER20VB-HF Datasheet

Current PartRFQ

CZRUR20VB-HF

Comchip TechnologyIn Stock: 1009CZRUR20VB-HF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CZRER20VB-HF is determined by strict equivalence across the following electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Zener voltage: 20 V nominal
• Tolerance: ±3%
• Maximum power dissipation: 150 mW
• Impedance (Max): 48 Ohms
• Reverse leakage current: 100 nA @ 15 V
• Forward voltage: 900 mV @ 10 mA
• Operating temperature range: -55°C to 125°C

Mechanical Compatibility Criteria:

• Surface mount technology
• RoHS3 compliance
• Moisture sensitivity level: 1 (Unlimited)

The CZRUR20VB-HF meets all electrical specifications identically. The primary difference is the package format (0603/SOD-523F versus 0503/SOD-723F) and active product status, making it a direct functional substitute with enhanced procurement availability.

Parameter Comparison

Engineering Selection Recommendations

The CZRUR20VB-HF is the direct substitute for the obsolete CZRER20VB-HF. Selection is based on the following engineering factors:

Product Status: The CZRER20VB-HF is classified as obsolete, creating supply chain risk. The CZRUR20VB-HF maintains active product status with Comchip Technology, ensuring long-term availability and manufacturing support.

Electrical Equivalence: All electrical parameters are identical between the main part and substitute, including zener voltage, tolerance, power rating, impedance, leakage current, and forward voltage characteristics. No circuit redesign is required.

Compliance: Both parts maintain ROHS3 compliance, REACH unaffected status, and EAR99 export classification, satisfying regulatory requirements for both legacy and current designs.

Package Consideration: The substitute uses a 0603/SOD-523F package format compared to the 0503/SOD-723F of the main part. PCB layout modification is required to accommodate the larger package footprint. The 0603 package provides improved thermal performance due to increased surface area.

Frequently Asked Questions (FAQ)

Q: Can CZRUR20VB-HF be used as a direct replacement for CZRER20VB-HF without circuit modification?

A: Electrical substitution is direct. All electrical parameters are identical. PCB layout modification is required due to package size difference (0603 versus 0503).

Q: What is the primary reason for substitution?

A: The CZRER20VB-HF is obsolete. The CZRUR20VB-HF is an active product with identical electrical specifications and improved procurement availability.

Q: Are there compliance differences between the two parts?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and classified as EAR99. Regulatory requirements are satisfied by either part.

Q: What is the package size difference?

A: CZRER20VB-HF uses 0503/SOD-723F packaging. CZRUR20VB-HF uses 0603/SOD-523F packaging. The 0603 package is larger and requires PCB layout adjustment.

Q: Are the electrical specifications identical?

A: Yes. Zener voltage (20 V), tolerance (±3%), power rating (150 mW), impedance (48 Ohms), reverse leakage (100 nA @ 15 V), forward voltage (900 mV @ 10 mA), and operating temperature range (-55°C to 125°C) are identical.

Q: What is the moisture sensitivity level for both parts?

A: Both parts have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.