2M24Z Zener Diode Equivalent & Substitute Parts

Part Overview

The 2M24Z is an active-status Zener diode manufactured by Taiwan Semiconductor Corporation, rated for 24 V nominal Zener voltage and 2 W maximum power dissipation in a DO-204AC (DO-15) axial through-hole package. This component is ROHS3 compliant and maintains unlimited moisture sensitivity classification. Substitute parts are identified to address application requirements for higher power ratings or alternative voltage specifications while maintaining core electrical and mechanical compatibility within the Zener diode category.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	24 V	V
Power - Max	2 W	W
Tolerance	±5%	%
Impedance (Max)	13 Ohms	Ω
Current - Reverse Leakage @ Vr	500 nA @ 18.2 V	nA
Operating Temperature Range	-55°C to 175°C	°C
Mounting Type	Through Hole	—
Package / Case	DO-204AC, DO-15, Axial	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the 2M24Z is determined by alignment across the following critical parameters:

Mandatory Alignment Parameters:

Zener voltage nominal rating (24 V or near-equivalent)
Package type (DO-204AC / DO-15 axial through-hole)
Tolerance specification (±5%)
Reverse leakage current classification (500 nA @ reference voltage)
Mounting configuration (through-hole)
Regulatory compliance (ROHS3, REACH Unaffected, EAR99)

Flexible Parameters (Application-Dependent):

Power rating (2 W baseline; higher ratings acceptable for increased thermal margin)
Impedance (lower impedance values indicate improved regulation characteristics)
Operating temperature range (extended ranges provide additional design margin)

The substitute parts 1N5359B-TP and 1N5360B-TP share identical package geometry, mounting type, and regulatory compliance with the 2M24Z. Both maintain the ±5% tolerance and 500 nA reverse leakage specification. Differences in power rating, impedance, and voltage rating are documented in the parameter comparison table below.

Parameter Comparison

Parameter	2M24Z (Main)	1N5359B-TP	1N5360B-TP
Manufacturer	Taiwan Semiconductor Corporation	Micro Commercial Co	Micro Commercial Co
Voltage - Zener (Nom)	24 V	24 V	25 V
Tolerance	±5%	±5%	±5%
Power - Max	2 W	5 W	5 W
Impedance (Max)	13 Ohms	3.5 Ohms	4 Ohms
Current - Reverse Leakage @ Vr	500 nA @ 18.2 V	500 nA @ 18.2 V	500 nA @ 19 V
Operating Temperature Range	-55°C to 175°C	-55°C to 150°C	-55°C to 150°C
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	DO-204AC, DO-15, Axial	DO-15, Axial	DO-15, Axial
Packaging Format	Tape & Reel (TR)	Cut Tape (CT)	Cut Tape (CT)
Product Status	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected
ECCN	EAR99	EAR99	EAR99

Engineering Selection Recommendations

1N5359B-TP Selection Criteria: The 1N5359B-TP maintains identical Zener voltage (24 V) and tolerance (±5%) to the 2M24Z while providing increased power dissipation capacity (5 W versus 2 W). The lower impedance (3.5 Ohms versus 13 Ohms) delivers superior voltage regulation performance. Both parts share identical reverse leakage current specifications and axial through-hole package geometry. The 1N5359B-TP operates across a reduced temperature range (-55°C to 150°C versus -55°C to 175°C). All regulatory compliance certifications (ROHS3, REACH Unaffected, EAR99) are equivalent. This substitute is suitable for applications requiring enhanced thermal performance or tighter voltage regulation without voltage specification changes.

1N5360B-TP Selection Criteria: The 1N5360B-TP differs from the 2M24Z in Zener voltage specification (25 V nominal versus 24 V nominal), representing a 4.2% increase within the ±5% tolerance band of the original part. Power rating is increased to 5 W, and impedance is reduced to 4 Ohms. Reverse leakage current is specified at 19 V reference versus 18.2 V. Operating temperature range is -55°C to 150°C. All regulatory compliance certifications match the main part. This substitute is applicable to circuits tolerating 25 V Zener voltage or where the 1 V differential provides design margin benefits.

Regulatory and Compliance Alignment: All three parts maintain active product status, ROHS3 compliance, REACH Unaffected classification, and EAR99 export control designation. Moisture sensitivity level is unlimited (MSL 1) for all parts, eliminating moisture-related handling constraints.

Frequently Asked Questions (FAQ)

Q: Can 1N5359B-TP directly replace 2M24Z in all applications?

A: The 1N5359B-TP is electrically compatible with the 2M24Z for applications where the identical 24 V Zener voltage and ±5% tolerance are required. The increased power rating (5 W versus 2 W) and reduced impedance (3.5 Ohms versus 13 Ohms) provide enhanced performance margins. The reduced operating temperature range (-55°C to 150°C versus -55°C to 175°C) must be evaluated against application thermal requirements. Package geometry and mounting type are identical.

Q: What is the voltage difference between 2M24Z and 1N5360B-TP?

A: The 1N5360B-TP is rated for 25 V nominal Zener voltage compared to 24 V for the 2M24Z. This represents a 1 V difference. Both parts maintain ±5% tolerance, which encompasses the voltage differential. Circuit designs must confirm that 25 V operation is acceptable for the intended application.

Q: Are packaging formats interchangeable between Tape & Reel and Cut Tape?

A: Tape & Reel (TR) and Cut Tape (CT) formats represent different supply configurations for the same component. The 2M24Z is supplied in Tape & Reel format, while both substitute parts are supplied in Cut Tape format. The physical component and electrical specifications remain identical; only the packaging and handling method differ. Component procurement and assembly processes must accommodate the specified format.

Q: How do impedance differences affect circuit performance?

A: Impedance (Zzt) characterizes the dynamic resistance of the Zener diode during regulation. The 2M24Z has 13 Ohms maximum impedance, while 1N5359B-TP has 3.5 Ohms and 1N5360B-TP has 4 Ohms. Lower impedance values result in improved voltage regulation and reduced output voltage variation under load changes. Applications requiring tighter voltage stability benefit from the lower impedance of the substitute parts.

Q: Do all three parts meet the same regulatory requirements?

A: Yes. The 2M24Z, 1N5359B-TP, and 1N5360B-TP are all ROHS3 compliant, REACH Unaffected, and classified as EAR99 for export control purposes. Moisture sensitivity level is unlimited (MSL 1) for all parts. Regulatory compliance is equivalent across all three components.

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

A: Reverse leakage current indicates the small current flowing through the Zener diode when reverse-biased below the Zener voltage threshold. The 2M24Z and 1N5359B-TP specify 500 nA @ 18.2 V, while 1N5360B-TP specifies 500 nA @ 19 V. The reference voltage difference reflects the 1 V Zener voltage difference between parts. Lower leakage current values indicate better diode quality and reduced power consumption in standby conditions.

Q: Can 1N5360B-TP be used in a circuit designed for 24 V regulation?

A: The 1N5360B-TP is rated for 25 V nominal Zener voltage. Use in a 24 V circuit requires circuit analysis to confirm that the 1 V voltage increase is acceptable. The ±5% tolerance specification allows for voltage variation, but the nominal rating shift must be evaluated against circuit requirements, load regulation, and system voltage tolerances.

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