Equivalent & Substitute Parts for 2M33Z B0G Zener Diode

Part Overview

The 2M33Z B0G is a 33 V, 2 W Zener diode manufactured by Taiwan Semiconductor Corporation in the DO-204AC (DO-15) axial through-hole package. This component is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute parts for ongoing design requirements and production needs. The part maintains ROHS3 compliance and operates across the temperature range of -55°C to 175°C.

Key Parameters

Parameter	Value
Voltage - Zener (Nom)	33 V
Power - Max	2 W
Tolerance	±5%
Impedance (Max)	23 Ohms
Current - Reverse Leakage @ Vr	500 nA @ 25.1 V
Operating Temperature	-55°C ~ 175°C
Mounting Type	Through Hole
Package / Case	DO-204AC, DO-15, Axial
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the 2M33Z B0G is determined by the following critical parameters: nominal Zener voltage (33 V), tolerance (±5%), reverse leakage current (500 nA @ 25.1 V), through-hole mounting configuration, and DO-15 package compatibility. Parts are grouped into two categories:

Direct Equivalent: Parts that maintain identical electrical specifications and package format, differing only in manufacturer designation or product status.

Parametric Equivalent: Parts that satisfy the core electrical requirements (33 V Zener voltage, ±5% tolerance, reverse leakage specification) while offering enhanced power ratings or automotive qualification.

Similar Substitute: Parts that maintain the 33 V Zener voltage and ±5% tolerance with compatible through-hole packaging but differ in power dissipation capability or impedance characteristics.

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Power - Max	Tolerance	Zzt (Max)	Reverse Leakage @ Vr	Operating Temp	Package	Product Status
2M33Z B0G	Taiwan Semiconductor Corporation	33 V	2 W	±5%	23 Ohms	500 nA @ 25.1 V	-55°C ~ 175°C	DO-204AC (DO-15)	Discontinued
2M33Z A0G	Taiwan Semiconductor Corporation	33 V	2 W	±5%	23 Ohms	500 nA @ 25.1 V	-55°C ~ 175°C	DO-204AC (DO-15)	Active
2M33ZHB0G	Taiwan Semiconductor Corporation	33 V	2 W	±5%	23 Ohms	500 nA @ 25.1 V	-55°C ~ 175°C	DO-204AC (DO-15)	Active
1N5364B-TP	Micro Commercial Co	33 V	5 W	±5%	10 Ohms	500 nA @ 25.1 V	-55°C ~ 150°C	DO-15	Active
3EZ33D5-TP	Micro Commercial Co	33 V	3 W	±5%	20 Ohms	500 nA @ 25.1 V	-55°C ~ 150°C	DO-15	Active

Engineering Selection Recommendations

Direct Equivalent Selection: The 2M33Z A0G is the primary direct equivalent, offering identical electrical specifications and package configuration with active product status. This part is manufactured by the same supplier and maintains all compliance certifications. The 2M33ZHB0G provides an alternative direct equivalent with additional automotive qualification (AEC-Q101) and higher inventory availability, suitable for applications requiring automotive-grade components.

Parametric Equivalent Selection: The 1N5364B-TP and 3EZ33D5-TP are suitable substitutes where the application permits higher power dissipation ratings. The 1N5364B-TP offers 5 W capability with reduced impedance (10 Ohms), while the 3EZ33D5-TP provides 3 W capability with impedance of 20 Ohms. Both maintain the 33 V Zener voltage and ±5% tolerance specification. Selection between these options depends on circuit power requirements and impedance constraints.

Compliance Considerations: All substitute parts maintain ROHS3 compliance and are classified as REACH Unaffected. The 2M33ZHB0G includes AEC-Q101 automotive qualification for applications requiring automotive-grade reliability.

Temperature Range Consideration: The 2M33Z B0G operates to 175°C maximum junction temperature. The 1N5364B-TP and 3EZ33D5-TP operate to 150°C maximum, representing a 25°C reduction in upper operating temperature. Applications requiring operation above 150°C must utilize the 2M33Z A0G or 2M33ZHB0G.

Frequently Asked Questions (FAQ)

Q: Can the 1N5364B-TP directly replace the 2M33Z B0G in all applications?

A: The 1N5364B-TP maintains the same 33 V Zener voltage and ±5% tolerance, making it electrically compatible for voltage regulation functions. However, the maximum operating temperature is 150°C versus 175°C for the original part. Applications operating above 150°C require the 2M33Z A0G or 2M33ZHB0G. The higher power rating (5 W versus 2 W) and lower impedance (10 Ohms versus 23 Ohms) are compatible with circuits designed for the 2 W part.

Q: What is the difference between the 2M33Z A0G and 2M33ZHB0G?

A: Both parts are direct equivalents with identical electrical specifications and package configuration. The 2M33ZHB0G includes AEC-Q101 automotive qualification and carries higher inventory availability. Selection depends on whether automotive-grade certification is required for the application.

Q: Why does the 3EZ33D5-TP have different impedance than the original part?

A: The 3EZ33D5-TP is a parametric equivalent with 3 W power rating and 20 Ohms impedance, compared to the 2 W, 23 Ohms specification of the 2M33Z B0G. The impedance difference reflects the different internal design of the substitute part. Both maintain the 33 V Zener voltage and ±5% tolerance required for voltage regulation applications.

Q: Are all substitute parts available in the same packaging format?

A: All substitute parts are available in DO-15 axial through-hole packages compatible with the original DO-204AC (DO-15) footprint. The 1N5364B-TP is supplied in Cut Tape (CT) packaging, while the 3EZ33D5-TP is supplied in Tape & Reel (TR) packaging. The 2M33Z A0G and 2M33ZHB0G maintain the original supplier device package designation.

Q: Can I use the 1N5364B-TP in a circuit designed for 2 W power dissipation?

A: Yes. The 1N5364B-TP is rated for 5 W maximum power dissipation, which exceeds the 2 W requirement of the original design. The higher power rating provides additional thermal margin and does not create compatibility issues in circuits designed for lower power operation.

Q: What is the significance of the reverse leakage current specification?

A: All substitute parts maintain the 500 nA @ 25.1 V reverse leakage specification, ensuring consistent leakage behavior across the product family. This parameter is critical for applications requiring low standby current or high impedance in reverse bias conditions.

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