CZRT55C6V2-G Zener Diode 6.2V 350mW SOT-23-3 Equivalent & Substitute Parts

Part Overview

The CZRT55C6V2-G is a surface mount Zener diode manufactured by Comchip Technology, rated at 6.2 V nominal with 350 mW maximum power dissipation in SOT-23-3 package. This component is classified as Active product status with full RoHS3 compliance and unlimited moisture sensitivity level (MSL 1). Zener diodes of this specification are used in voltage regulation, overvoltage protection, and reference circuits in consumer and industrial electronics. Equivalent and substitute parts are identified based on matching electrical parameters and mechanical compatibility within the SOT-23-3 surface mount package family.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	6.2	V
Tolerance	±6%	—
Power - Max	350	mW
Impedance (Max)	10	Ohms
Current - Reverse Leakage @ Vr	3	µA @ 4 V
Voltage - Forward (Vf) (Max) @ If	900	mV @ 10 mA
Operating Temperature	-65 to 150	°C
Package / Case	SOT-23-3	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution eligibility for the CZRT55C6V2-G is determined by the following critical parameters:

Primary Matching Criteria:

Zener voltage: 6.2 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 Parameters:

Power rating: 300 mW to 350 mW acceptable
Voltage tolerance: ±2% to ±6% acceptable
Impedance (Max): 7 to 10 Ohms acceptable
Reverse leakage current: 500 nA to 5 µA @ 4 V acceptable
Forward voltage: 900 mV @ 10 mA

Substitute parts are grouped into two categories: MFR Recommended (manufacturer-endorsed alternatives) and Parametric Equivalent (parts meeting all electrical and mechanical specifications). All listed substitutes maintain the 6.2 V Zener voltage specification and SOT-23-3 package compatibility required for direct board-level replacement.

Parameter Comparison

Part Number	Manufacturer	Vz (V)	Tolerance	Power (mW)	Zzt (Ohms)	Ir @ 4V (µA)	Vf @ 10mA (mV)	Temp Range (°C)	Package
CZRT55C6V2-G	Comchip Technology	6.2	±6%	350	10	3	900	-65 to 150	SOT-23-3
BZX84B6V2-7-F	Diodes Incorporated	6.2	±2%	300	10	3	900	-65 to 150	SOT-23-3
BZX84B6V2Q-7-F	Diodes Incorporated	6.2	±2%	300	10	3	900	-65 to 150	SOT-23-3
BZX84C6V2-7-F	Diodes Incorporated	6.2	±6%	300	10	3	900	-65 to 150	SOT-23-3
BZX84C6V2-TP	Micro Commercial Co	6.2	±5%	350	10	3	900	-55 to 150	SOT-23-3
DDZX6V2B-13	Diodes Incorporated	6.2	±3%	300	7	0.5	900	-65 to 150	SOT-23-3
DDZX6V2B-7	Diodes Incorporated	6.2	±3%	300	7	0.5	900	-65 to 150	SOT-23-3
MMBZ5234B-7-F	Diodes Incorporated	6.2	±5%	350	7	5	900	-65 to 150	SOT-23-3
MMBZ5234B-TP	Micro Commercial Co	6.2	±5%	350	7	5	900	-55 to 150	SOT-23-3
BZX84C6V2 TR	Central Semiconductor Corp	6.2	±5%	350	10	3	900	-65 to 150	SOT-23-3

Engineering Selection Recommendations

MFR Recommended Substitutes (Highest Compatibility):

The following parts carry manufacturer endorsement and are listed as direct alternatives in component databases:

BZX84B6V2-7-F (Diodes Incorporated): Tighter tolerance (±2%) with 300 mW rating. Suitable for applications requiring improved voltage accuracy. Operating temperature range -65°C to 150°C matches original specification.
BZX84C6V2-7-F (Diodes Incorporated): Matching ±6% tolerance with 300 mW rating. Identical electrical performance to CZRT55C6V2-G with lower power dissipation capability. Recommended for standard voltage regulation applications.
MMBZ5234B-7-F (Diodes Incorporated): Maintains 350 mW power rating with ±5% tolerance and lower impedance (7 Ohms). Provides improved dynamic performance in transient suppression circuits.

Parametric Equivalent (Full Specification Match):

BZX84C6V2 TR (Central Semiconductor Corp): Identical electrical specifications including 350 mW power rating, ±5% tolerance, and 10 Ohms impedance. Direct functional equivalent with full temperature range coverage.

Automotive-Grade Alternative:

BZX84B6V2Q-7-F (Diodes Incorporated): AEC-Q101 qualified automotive-grade component with ±2% tolerance. Suitable for automotive and high-reliability applications requiring enhanced qualification documentation.

High-Performance Alternative:

DDZX6V2B-7 (Diodes Incorporated): Superior performance characteristics with ±3% tolerance, lower impedance (7 Ohms), and significantly reduced reverse leakage (500 nA vs. 3 µA). Recommended for precision voltage reference and low-noise applications. Highest inventory availability (489,500 pcs).

All substitute parts maintain RoHS3 compliance, MSL 1 rating, and SOT-23-3 package compatibility. Selection should be based on application requirements for power dissipation, voltage tolerance, and dynamic impedance characteristics.

Frequently Asked Questions (FAQ)

Q: Can BZX84C6V2-7-F replace CZRT55C6V2-G directly on the PCB?

A: Yes. Both components share identical SOT-23-3 package pinout, 6.2 V Zener voltage, and operating temperature range (-65°C to 150°C). The primary difference is power rating (300 mW vs. 350 mW). Direct PCB substitution is mechanically and electrically compatible for applications not exceeding 300 mW continuous dissipation.

Q: What is the difference between BZX84B6V2-7-F and BZX84C6V2-7-F?

A: Both are Diodes Incorporated products in SOT-23-3 package with 6.2 V Zener voltage and 300 mW power rating. The primary difference is voltage tolerance: BZX84B6V2-7-F offers ±2% tolerance (tighter), while BZX84C6V2-7-F offers ±6% tolerance (matching CZRT55C6V2-G). Select BZX84B6V2-7-F for precision voltage regulation; select BZX84C6V2-7-F for standard applications.

Q: Why do some substitutes have lower power ratings (300 mW vs. 350 mW)?

A: Lower power-rated devices (300 mW) are acceptable substitutes when circuit design ensures dissipation remains below 300 mW. These alternatives often provide superior electrical characteristics such as tighter tolerance or lower impedance. Verify application power budget before selection.

Q: Is DDZX6V2B-7 suitable for high-frequency transient suppression?

A: Yes. DDZX6V2B-7 features lower impedance (7 Ohms vs. 10 Ohms) and significantly reduced reverse leakage (500 nA vs. 3 µA), making it superior for transient suppression and high-frequency applications. Identical SOT-23-3 package and operating temperature range ensure direct compatibility.

Q: What does the "-7-F" or "-TP" suffix indicate in part numbers?

A: These suffixes denote packaging and tape configuration variants. "-7-F" typically indicates Tape & Reel packaging with specific tape format. "-TP" indicates alternative tape configuration. Both are surface mount compatible; selection depends on assembly equipment compatibility and supplier availability.

Q: Can I use MMBZ5234B-7-F in place of CZRT55C6V2-G?

A: Yes. MMBZ5234B-7-F maintains 6.2 V Zener voltage, 350 mW power rating, and SOT-23-3 package. It offers lower impedance (7 Ohms) and ±5% tolerance. Direct substitution is compatible; the lower impedance may improve circuit performance in voltage regulation applications.

Q: Are there temperature range limitations for any substitutes?

A: Yes. BZX84C6V2-TP and MMBZ5234B-TP (both Micro Commercial Co) operate at -55°C to 150°C, which is narrower than the original -65°C to 150°C range. These parts are unsuitable for applications requiring full -65°C minimum temperature operation. All other substitutes maintain the full -65°C to 150°C range.

Q: What is the inventory status for high-volume procurement?

A: DDZX6V2B-7 offers the highest inventory (489,500 pcs), followed by BZX84C6V2-7-F (65,200 pcs) and MMBZ5234B-7-F (137,200 pcs). For immediate availability in large quantities, DDZX6V2B-7 is recommended. Verify current stock levels with suppliers for time-sensitive projects.

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