2M39Z Zener Diode Equivalent & Substitute Parts

Part Overview

The 2M39Z is an active-status Zener diode manufactured by Taiwan Semiconductor Corporation, rated for 39 V nominal Zener voltage with 2 W maximum power dissipation. This component is packaged in DO-204AC (DO-15) axial through-hole configuration and is ROHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, application redesign, or supply chain considerations.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	39	V
Tolerance	±5%	%
Power - Max	2	W
Impedance (Max)	30	Ohms
Current - Reverse Leakage @ Vr	500 nA @ 29.7 V	nA
Operating Temperature Range	-55 to 175	°C
Mounting Type	Through Hole	—
Package / Case	DO-204AC, DO-15, Axial	—

Substitute Part Grouping Explanation

Substitution of the 2M39Z is determined by the following critical parameters:

Electrical Compatibility Criteria:

Zener voltage (Nom): 39 V ±5% tolerance
Reverse leakage current: 500 nA @ 29.7 V
Package / Case: DO-204AC or DO-15 axial through-hole

Mechanical Compatibility Criteria:

Mounting type: Through hole
Physical package: DO-15 axial configuration

Regulatory & Compliance Criteria:

ROHS3 compliance
REACH unaffected status
ECCN: EAR99

The 1N5366B-TP meets all electrical and mechanical compatibility requirements. While the 1N5366B-TP provides higher maximum power dissipation (5 W versus 2 W) and lower impedance (14 Ohms versus 30 Ohms), these characteristics represent enhanced performance within the same functional category and do not preclude substitution in applications designed for the 2M39Z.

Parameter Comparison

Parameter	2M39Z	1N5366B-TP	Unit
Manufacturer	Taiwan Semiconductor Corporation	Micro Commercial Co	—
Voltage - Zener (Nom)	39	39	V
Tolerance	±5%	±5%	%
Power - Max	2	5	W
Impedance (Max)	30	14	Ohms
Current - Reverse Leakage @ Vr	500 nA @ 29.7 V	500 nA @ 29.7 V	nA
Operating Temperature Range	-55 to 175	-55 to 150	°C
Mounting Type	Through Hole	Through Hole	—
Package / Case	DO-204AC, DO-15, Axial	DO-204AC, DO-15, Axial	—
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	—
REACH Status	REACH Unaffected	REACH Unaffected	—
Product Status	Active	Active	—

Engineering Selection Recommendations

Both the 2M39Z and 1N5366B-TP are active-status components with ROHS3 compliance and REACH unaffected designation, confirming regulatory alignment for current manufacturing and deployment.

The 1N5366B-TP is electrically compatible as a direct substitute based on matching Zener voltage (39 V), tolerance (±5%), and reverse leakage characteristics (500 nA @ 29.7 V). The substitute part exhibits superior performance specifications: maximum power dissipation of 5 W (versus 2 W) and lower impedance of 14 Ohms (versus 30 Ohms).

The operating temperature range of the 1N5366B-TP extends to 150°C maximum, compared to 175°C for the 2M39Z. Applications requiring operation above 150°C must retain the 2M39Z.

Both components utilize identical DO-15 axial through-hole packaging, ensuring mechanical interchangeability without circuit board modification.

Frequently Asked Questions (FAQ)

Q: Can the 1N5366B-TP replace the 2M39Z in all applications?

A: The 1N5366B-TP is electrically and mechanically compatible with the 2M39Z for applications operating at or below 150°C. Applications requiring operation above 150°C must use the 2M39Z, which is rated to 175°C.

Q: What is the significance of the power rating difference (2 W versus 5 W)?

A: The 1N5366B-TP supports higher power dissipation. In applications where the 2M39Z is thermally limited, the 1N5366B-TP provides enhanced thermal margin. Conversely, if the application is designed for 2 W operation, the 1N5366B-TP remains fully compatible.

Q: Are the impedance differences (30 Ohms versus 14 Ohms) significant for substitution?

A: Lower impedance in the 1N5366B-TP results in improved transient response and lower dynamic resistance. This represents enhanced performance and does not create incompatibility with circuits designed for the 2M39Z.

Q: Do both parts use the same physical package?

A: Yes. Both the 2M39Z and 1N5366B-TP use DO-15 axial through-hole packaging. No circuit board layout changes are required for substitution.

Q: Are both parts compliant with current regulatory requirements?

A: Yes. Both components are ROHS3 compliant and REACH unaffected, confirming compliance with current environmental and hazardous substance regulations.

Q: What is the reverse leakage current specification, and is it identical between parts?

A: Both parts specify 500 nA reverse leakage current at 29.7 V, ensuring equivalent leakage performance in high-impedance circuit applications.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message