CZRT55C2V4-G Zener Diode Equivalent & Substitute Parts

Part Overview

The CZRT55C2V4-G is a 2.4 V Zener diode manufactured by Comchip Technology, rated for 350 mW maximum power dissipation in a surface mount SOT-23-3 package. This component is classified as Active product status and is ROHS3 compliant. Equivalent and substitute parts are identified when design requirements permit component sourcing flexibility, inventory constraints exist, or supply chain optimization is necessary while maintaining electrical and mechanical compatibility within specified parameter tolerances.

Substiute Parts

CZRT55C2V4-G

Comchip TechnologyIn Stock: 939CZRT55C2V4-G Datasheet

Current PartRFQ

BZX84C2V4-7-F

Diodes IncorporatedIn Stock: 4228BZX84C2V4-7-F Datasheet

MFR RecommendedRFQ

MMBZ5221B-7-F

Diodes IncorporatedIn Stock: 18606MMBZ5221B-7-F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CZRT55C2V4-G is determined by the following critical parameters:

Primary Matching Criteria:

• Zener voltage nominal value: 2.4 V
• Package type: SOT-23-3 (TO-236-3, SC-59)
• Mounting type: Surface Mount
• Operating temperature range: -65°C to 150°C minimum
• RoHS3 compliance and MSL Level 1 rating

Secondary Compatibility Parameters:

• Maximum power dissipation: 350 mW or greater
• Impedance (Zzt): 100 Ohms or lower
• Reverse leakage current: 50 µA @ 1 V or lower
• Forward voltage: 900 mV @ 10 mA or lower
• Tolerance: ±8% or tighter

The identified substitute parts BZX84C2V4-7-F and MMBZ5221B-7-F meet the primary matching criteria. Secondary parameter variations are documented in the comparison table below.

Parameter Comparison

Engineering Selection Recommendations

BZX84C2V4-7-F Selection Criteria:

The BZX84C2V4-7-F is suitable for applications where the CZRT55C2V4-G is unavailable. This substitute maintains identical zener voltage, tolerance, impedance, and reverse leakage specifications. The maximum power rating is 300 mW, which is 50 mW lower than the main part. Selection of this substitute is appropriate for circuits where power dissipation does not exceed 300 mW. All regulatory compliance parameters (ROHS3, MSL Level 1, REACH Unaffected, EAR99) are identical.

MMBZ5221B-7-F Selection Criteria:

The MMBZ5221B-7-F provides enhanced performance characteristics in specific parameters. This substitute offers tighter tolerance (±5% versus ±8%), lower impedance (30 Ohms versus 100 Ohms), and equal maximum power rating (350 mW). The reverse leakage current is specified at 100 µA @ 1 V, which is higher than the main part specification of 50 µA @ 1 V. This substitute is appropriate for applications requiring improved voltage regulation stability and lower output impedance. All regulatory compliance parameters are identical to the main part.

Both substitutes maintain full compatibility with the SOT-23-3 package footprint, surface mount assembly processes, and operating temperature range. Selection between substitutes depends on specific circuit requirements regarding power dissipation limits and impedance characteristics.

Frequently Asked Questions (FAQ)

Q: Can BZX84C2V4-7-F replace CZRT55C2V4-G in all applications?

A: BZX84C2V4-7-F is compatible with CZRT55C2V4-G for applications where maximum power dissipation does not exceed 300 mW. If the circuit design requires 350 mW dissipation capability, this substitute is not suitable. Verify circuit power requirements before selection.

Q: What is the primary difference between MMBZ5221B-7-F and the main part?

A: MMBZ5221B-7-F differs in three parameters: tolerance (±5% versus ±8%), impedance (30 Ohms versus 100 Ohms), and reverse leakage current (100 µA versus 50 µA @ 1 V). The zener voltage, power rating, package, and temperature range are identical.

Q: Are all three parts pin-compatible?

A: Yes. CZRT55C2V4-G, BZX84C2V4-7-F, and MMBZ5221B-7-F all use the SOT-23-3 package with identical pinout. Direct PCB footprint substitution is possible without layout modification.

Q: Do the substitute parts meet the same regulatory requirements?

A: Yes. All three parts are ROHS3 compliant, MSL Level 1, REACH Unaffected, and classified as EAR99. Regulatory compliance is equivalent across all parts.

Q: Which substitute should be selected for improved voltage regulation?

A: MMBZ5221B-7-F provides lower impedance (30 Ohms) compared to CZRT55C2V4-G (100 Ohms), resulting in improved voltage regulation characteristics and reduced output impedance variation.

Q: Can MMBZ5221B-7-F be used in circuits designed for CZRT55C2V4-G?

A: MMBZ5221B-7-F is compatible with CZRT55C2V4-G. The higher reverse leakage current (100 µA versus 50 µA) and lower impedance may affect circuit behavior in applications with tight leakage current specifications. Verify circuit requirements before substitution.

Q: What is the impact of tolerance differences between parts?

A: CZRT55C2V4-G and BZX84C2V4-7-F both specify ±8% tolerance. MMBZ5221B-7-F specifies ±5% tolerance, providing tighter voltage regulation. For applications requiring strict voltage accuracy, MMBZ5221B-7-F offers superior performance.