CZRT55C4V7-G Zener Diode 4.7V 350mW SOT-23-3 Equivalent & Substitute Parts

Part Overview

The CZRT55C4V7-G is a surface mount Zener diode manufactured by Comchip Technology, rated at 4.7 V nominal with 350 mW maximum power dissipation in SOT-23-3 package. This component is classified as Active product status and is ROHS3 compliant. Equivalent and substitute parts are identified based on matching electrical specifications and mechanical compatibility within the SOT-23-3 package family. Alternative sources become necessary for supply chain continuity, inventory availability, or design flexibility across multiple qualified manufacturers.

Substiute Parts

CZRT55C4V7-G

Comchip TechnologyIn Stock: 902CZRT55C4V7-G Datasheet

Current PartRFQ

BZX84B4V7-7-F

Diodes IncorporatedIn Stock: 9203BZX84B4V7-7-F Datasheet

MFR RecommendedRFQ

BZX84B4V7Q-7-F

Diodes IncorporatedIn Stock: 844BZX84B4V7Q-7-F Datasheet

MFR RecommendedRFQ

BZX84C4V7-7-F

Diodes IncorporatedIn Stock: 17223BZX84C4V7-7-F Datasheet

MFR RecommendedRFQ

BZX84C4V7-TP

Micro Commercial CoIn Stock: 23470BZX84C4V7-TP Datasheet

MFR RecommendedRFQ

MMBZ5230B-7-F

Diodes IncorporatedIn Stock: 2499MMBZ5230B-7-F Datasheet

MFR RecommendedRFQ

MMBZ5230B-TP

Micro Commercial CoIn Stock: 3579MMBZ5230B-TP Datasheet

MFR RecommendedRFQ

BZX84C4V7 TR PBFREE

Central Semiconductor CorpIn Stock: 31152BZX84C4V7 TR PBFREE Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CZRT55C4V7-G is determined by the following critical parameters:

Primary Matching Criteria:

• Zener voltage: 4.7 V nominal
• Package: SOT-23-3 (TO-236-3, SC-59)
• Mounting type: Surface Mount
• Operating temperature range: -65°C to 150°C minimum
• RoHS3 compliance

Secondary Compatibility Factors:

• Power rating: 300 mW to 350 mW acceptable
• Tolerance: ±2% to ±6% acceptable
• Impedance (Zzt): 19 to 80 Ohms acceptable
• Reverse leakage current: 3 to 5 µA @ 2 V acceptable
• Forward voltage: 900 mV @ 10 mA maximum

Substitute parts are grouped into two categories: MFR Recommended (manufacturer-qualified alternatives) and Parametric Equivalent (parts meeting all electrical and mechanical specifications).

Parameter Comparison

Engineering Selection Recommendations

Direct Substitutes (Highest Compatibility):

BZX84C4V7-TP (Micro Commercial Co) and BZX84C4V7 TR PBFREE (Central Semiconductor Corp) provide the closest electrical match to CZRT55C4V7-G. Both maintain 4.7 V nominal voltage, 350 mW power rating, 80 Ohms impedance, and -65°C to 150°C operating range. Both are ROHS3 compliant and available in Tape & Reel packaging. BZX84C4V7-TP operates from -55°C minimum, which is acceptable for most applications requiring -65°C to 150°C range.

Qualified Alternatives (Acceptable Substitution):

BZX84B4V7-7-F and BZX84B4V7Q-7-F (Diodes Incorporated) are qualified alternatives with tighter ±2% tolerance. Power rating is reduced to 300 mW, which is acceptable for applications not requiring full 350 mW dissipation. BZX84B4V7Q-7-F carries AEC-Q101 automotive qualification. Both maintain 80 Ohms impedance and full -65°C to 150°C temperature range.

Parametric Equivalents (Electrical Match with Design Considerations):

MMBZ5230B-7-F and MMBZ5230B-TP (Diodes Incorporated and Micro Commercial Co) match 4.7 V voltage and 350 mW power but feature significantly lower impedance (19 Ohms vs. 80 Ohms) and slightly higher reverse leakage (5 µA vs. 3 µA). These characteristics may affect circuit performance in precision voltage regulation applications. MMBZ5230B-TP operates from -55°C minimum.

Compliance Status:

All substitute parts maintain ROHS3 compliance, REACH unaffected status, and EAR99 export classification matching the original CZRT55C4V7-G.

Frequently Asked Questions (FAQ)

Q: Can BZX84B4V7-7-F replace CZRT55C4V7-G in all applications?

A: BZX84B4V7-7-F is electrically compatible for most applications. The primary difference is reduced power rating (300 mW vs. 350 mW). Substitution is valid when circuit design does not require the full 350 mW dissipation capability. Tighter tolerance (±2% vs. ±6%) is an improvement for precision applications.

Q: What is the difference between BZX84C4V7-7-F and BZX84B4V7-7-F?

A: Both are Diodes Incorporated products with identical electrical specifications except tolerance. BZX84B4V7-7-F specifies ±2% tolerance, while BZX84C4V7-7-F specifies ±6% tolerance. BZX84C4V7-7-F is available in Cut Tape (CT) & Digi-Reel packaging, whereas BZX84B4V7-7-F is Tape & Reel (TR).

Q: Why do MMBZ5230B parts have lower impedance (19 Ohms)?

A: MMBZ5230B series is a different product line with different internal design characteristics. Lower impedance (19 Ohms vs. 80 Ohms) affects dynamic response and noise performance. Substitution requires circuit analysis to confirm compatibility with impedance-dependent functions.

Q: Is BZX84C4V7-TP suitable for -65°C operation?

A: BZX84C4V7-TP specifies -55°C to 150°C operating range. For applications requiring -65°C operation, use CZRT55C4V7-G, BZX84B4V7-7-F, BZX84B4V7Q-7-F, BZX84C4V7-7-F, MMBZ5230B-7-F, or BZX84C4V7 TR PBFREE, all rated to -65°C.

Q: What packaging options are available?

A: CZRT55C4V7-G is supplied in Tape & Reel (TR). Substitute parts are available in both Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel packaging. Verify packaging requirement before selection to ensure compatibility with assembly equipment and procurement processes.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, matching the original CZRT55C4V7-G specification.

Q: Which substitute offers the best tolerance specification?

A: BZX84B4V7-7-F and BZX84B4V7Q-7-F both specify ±2% tolerance, superior to the original ±6% specification. This tighter tolerance is beneficial for precision voltage reference and regulation circuits.