CZRT55C8V2-G Zener Diode 8.2V 350mW SOT-23-3 Equivalent & Substitute Parts

Part Overview

The CZRT55C8V2-G is an 8.2 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. Zener diodes of this specification are used in voltage regulation, overvoltage protection, and reference voltage circuits. Substitute parts are identified based on matching electrical characteristics and package compatibility to ensure functional equivalence in circuit applications.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	8.2	V
Tolerance	±6%	—
Power - Max	350	mW
Impedance (Max)	15	Ohms
Current - Reverse Leakage @ Vr	700	nA @ 5 V
Voltage - Forward (Vf) (Max) @ If	900	mV @ 10 mA
Operating Temperature Range	-65 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	SOT-23-3	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the CZRT55C8V2-G is determined by the following critical parameters:

Primary Matching Criteria:

Zener voltage: 8.2 V nominal
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

Secondary Compatibility Factors:

Power rating: 350 mW or higher
Tolerance: ±6% or tighter
Impedance (Max): 15 Ohms or lower
Reverse leakage current: 700 nA @ 5 V or lower
Forward voltage: 900 mV @ 10 mA or lower

All substitute parts listed maintain the 8.2 V Zener voltage specification and SOT-23-3 package format. Variations in tolerance, power rating, and impedance are noted to allow selection based on circuit requirements.

Parameter Comparison

Part Number	Manufacturer	Vz (V)	Tolerance	Power (mW)	Zzt (Ohms)	Reverse Leakage @ Vr	Vf (Max) @ If	Temp Range (°C)	Package
CZRT55C8V2-G	Comchip Technology	8.2	±6%	350	15	700 nA @ 5 V	900 mV @ 10 mA	-65 to 150	SOT-23-3
BZX84B8V2-7-F	Diodes Incorporated	8.2	±2%	300	15	700 nA @ 5 V	900 mV @ 10 mA	-65 to 150	SOT-23-3
BZX84B8V2-TP	Micro Commercial Co	8.2	±2%	350	15	700 nA @ 5 V	900 mV @ 10 mA	-55 to 150	SOT-23-3
BZX84B8V2Q-7-F	Diodes Incorporated	8.2	±2%	300	15	700 nA @ 5 V	900 mV @ 10 mA	-65 to 150	SOT-23-3
BZX84C8V2-7-F	Diodes Incorporated	8.2	±6%	300	15	700 nA @ 5 V	900 mV @ 10 mA	-65 to 150	SOT-23-3
BZX84C8V2-TP	Micro Commercial Co	8.2	±5%	350	15	700 nA @ 5 V	900 mV @ 10 mA	-55 to 150	SOT-23-3
DDZX8V2C-13	Diodes Incorporated	8.2	±3%	300	8	100 nA @ 6.5 V	900 mV @ 10 mA	-65 to 150	SOT-23-3
DDZX8V2C-7	Diodes Incorporated	8.2	±2.55%	300	8	100 nA @ 6.5 V	900 mV @ 10 mA	-65 to 150	SOT-23-3
MMBZ5237B-7-F	Diodes Incorporated	8.2	±5%	350	8	3 µA @ 6.5 V	900 mV @ 10 mA	-65 to 150	SOT-23-3
MMBZ5237BQ-7-F	Diodes Incorporated	8.2	±5%	350	8	3 µA @ 6.5 V	900 mV @ 10 mA	-65 to 150	SOT-23-3

Engineering Selection Recommendations

Direct Substitutes (Highest Compatibility):

BZX84B8V2-TP and BZX84C8V2-TP are direct substitutes for the CZRT55C8V2-G. Both maintain the 350 mW power rating, 8.2 V Zener voltage, and SOT-23-3 package. BZX84B8V2-TP offers tighter tolerance (±2%) and identical temperature range (-65°C to 150°C). BZX84C8V2-TP provides ±5% tolerance with the same temperature range. Both are ROHS3 compliant and Active product status.

High-Compatibility Alternatives:

BZX84B8V2-7-F, BZX84B8V2Q-7-F, and BZX84C8V2-7-F are suitable substitutes with reduced power ratings (300 mW). These parts maintain the 8.2 V specification, SOT-23-3 package, and full temperature range (-65°C to 150°C). BZX84B8V2Q-7-F includes AEC-Q101 automotive qualification. All are ROHS3 compliant and Active status.

Enhanced Performance Alternatives:

DDZX8V2C-7 and DDZX8V2C-13 offer improved impedance characteristics (8 Ohms versus 15 Ohms) and lower reverse leakage current (100 nA @ 6.5 V). These parts are rated for 300 mW and maintain the 8.2 V specification with SOT-23-3 packaging and full temperature range. DDZX8V2C-7 provides tighter tolerance (±2.55%).

Automotive-Grade Options:

MMBZ5237BQ-7-F is AEC-Q101 qualified for automotive applications, rated 350 mW at 8.2 V with ±5% tolerance. This part features lower impedance (8 Ohms) and is suitable for applications requiring automotive-grade reliability.

Selection Basis:

All substitute parts are Active product status and ROHS3 compliant, matching the regulatory and availability requirements of the CZRT55C8V2-G. Selection among substitutes depends on specific circuit requirements for power dissipation, tolerance, impedance, and leakage current specifications.

Frequently Asked Questions (FAQ)

Q: Can BZX84B8V2-7-F replace CZRT55C8V2-G in all applications?

A: BZX84B8V2-7-F is compatible for applications where 300 mW power rating is sufficient. The CZRT55C8V2-G is rated 350 mW. Both maintain 8.2 V Zener voltage, ±6% or better tolerance, and SOT-23-3 package. Verify circuit power dissipation requirements before substitution.

Q: What is the difference between BZX84B8V2-TP and BZX84C8V2-TP?

A: Both parts are rated 350 mW at 8.2 V in SOT-23-3 package. BZX84B8V2-TP offers ±2% tolerance versus ±5% for BZX84C8V2-TP. Both operate -55°C to 150°C. BZX84B8V2-TP provides tighter voltage tolerance for precision applications.

Q: Are DDZX8V2C series parts direct replacements?

A: DDZX8V2C-7 and DDZX8V2C-13 maintain 8.2 V Zener voltage and SOT-23-3 package but are rated 300 mW versus 350 mW for the CZRT55C8V2-G. These parts feature lower impedance (8 Ohms) and reduced reverse leakage (100 nA @ 6.5 V), making them suitable for applications requiring improved performance characteristics.

Q: What is the significance of the temperature range difference between -65°C and -55°C?

A: Parts rated -65°C to 150°C provide wider operating range than -55°C to 150°C variants. For applications operating below -55°C, select parts with -65°C minimum rating. CZRT55C8V2-G, BZX84B8V2-7-F, BZX84B8V2Q-7-F, BZX84C8V2-7-F, DDZX8V2C-13, DDZX8V2C-7, MMBZ5237B-7-F, and MMBZ5237BQ-7-F all support -65°C minimum.

Q: Is MMBZ5237BQ-7-F suitable for automotive applications?

A: Yes. MMBZ5237BQ-7-F carries AEC-Q101 automotive qualification and is rated 350 mW at 8.2 V with ±5% tolerance in SOT-23-3 package. This part is suitable for automotive-grade circuit designs requiring qualified components.

Q: How do impedance differences affect circuit performance?

A: Impedance (Zzt) affects voltage regulation quality. Lower impedance (8 Ohms in DDZX8V2C and MMBZ5237 series) provides better voltage stability under load changes compared to 15 Ohms (BZX84 and CZRT55 series). Select based on circuit regulation requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant, matching the environmental compliance of CZRT55C8V2-G. All parts are Active product status with unlimited moisture sensitivity level (MSL 1).

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