ZMY22-GS08 Equivalent & Substitute Parts

Part Overview

The ZMY22-GS08 is a Zener diode rated at 22 V, 1 W, manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component in DO-213AB (MELF) packaging is designed for voltage regulation and protection applications in automotive-grade circuits. The part is Active in product status and carries AEC-Q101 automotive qualification. Substitute parts are identified to address inventory availability, packaging format preferences, or specific parametric requirements while maintaining functional equivalence in circuit applications.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	22	V
Tolerance	±5	%
Power - Maximum	1	W
Package / Case	DO-213AB, MELF (Glass)	—
Mounting Type	Surface Mount	—
Operating Temperature	175	°C
Grade	Automotive	—
Qualification	AEC-Q101	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the ZMY22-GS08 are identified based on the following critical parameters that determine functional equivalence:

Primary Equivalence Criteria:

Voltage - Zener (Nominal): 22 V
Tolerance: ±5%
Power - Maximum: 1 W
Package / Case: DO-213AB, MELF (Glass)
Mounting Type: Surface Mount
Grade: Automotive
Qualification: AEC-Q101

Substitution Logic: Parts are grouped as substitutes when they maintain identical zener voltage, tolerance, power rating, package type, and automotive qualification. Variations in impedance (Zzt) and reverse leakage current (Izt) are permitted within the allowed parametric range for this component category, as these characteristics do not affect the primary voltage regulation function in standard circuit applications. Packaging format (Cut Tape vs. Tape & Reel) represents a supply chain variable and does not affect electrical performance.

Parameter Comparison

Parameter	ZMY22-GS08	ZM4748A-GS08	ZMY22-GS18
Voltage - Zener (Nom)	22 V	22 V	22 V
Tolerance	±5%	±5%	±5%
Power - Max	1 W	1 W	1 W
Impedance (Max) (Zzt)	13 Ohms	23 Ohms	13 Ohms
Current - Reverse Leakage @ Vr	500 nA @ 17 V	5 µA @ 16.7 V	500 nA @ 17 V
Operating Temperature	175°C	175°C	175°C
Grade	Automotive	Automotive	Automotive
Qualification	AEC-Q101	AEC-Q101	AEC-Q101
Package / Case	DO-213AB, MELF	DO-213AB, MELF	DO-213AB, MELF
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Packaging Format	Cut Tape (CT)	Tape & Reel (TR)	Tape & Reel (TR)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

ZMY22-GS08 (Primary Part): Select this part when Cut Tape packaging is required for manual assembly or small-volume production runs. Impedance of 13 Ohms and reverse leakage of 500 nA @ 17 V provide baseline performance characteristics. Active product status and AEC-Q101 qualification confirm ongoing manufacturing support and automotive reliability standards.

ZMY22-GS18 (Parametric Equivalent): This part is electrically identical to ZMY22-GS08, with matching impedance (13 Ohms) and reverse leakage characteristics (500 nA @ 17 V). The primary difference is Tape & Reel packaging, suitable for automated assembly processes. Higher inventory availability (3271 Pcs) may support production continuity. Both parts share the same base product number (ZMY22) and carry identical automotive qualifications.

ZM4748A-GS08 (Direct Substitute): This part maintains the 22 V, 1 W rating and DO-213AB package but exhibits higher impedance (23 Ohms) and elevated reverse leakage (5 µA @ 16.7 V) compared to the primary part. Tape & Reel packaging supports automated assembly. Different base product number (ZM4748) indicates distinct manufacturing lineage. All three parts meet AEC-Q101 automotive qualification and ROHS3 compliance requirements.

Selection between these substitutes depends on packaging format availability, inventory status, and circuit-specific tolerance for impedance and leakage variations within the allowed parametric range.

Frequently Asked Questions (FAQ)

Q: Can ZMY22-GS18 be used as a direct replacement for ZMY22-GS08?

A: Yes. Both parts are parametrically equivalent with identical zener voltage (22 V), tolerance (±5%), power rating (1 W), impedance (13 Ohms), and reverse leakage (500 nA @ 17 V). The difference is packaging format: ZMY22-GS08 is supplied in Cut Tape, while ZMY22-GS18 is supplied in Tape & Reel. Electrical performance in the circuit is identical.

Q: What is the difference between ZM4748A-GS08 and ZMY22-GS08?

A: Both parts share the same zener voltage (22 V), tolerance (±5%), and power rating (1 W). The ZM4748A-GS08 has higher impedance (23 Ohms vs. 13 Ohms) and higher reverse leakage (5 µA @ 16.7 V vs. 500 nA @ 17 V). These differences fall within acceptable parametric ranges for zener diodes but may affect circuit performance in applications with strict leakage or impedance requirements.

Q: Are all three parts automotive-qualified?

A: Yes. ZMY22-GS08, ZM4748A-GS08, and ZMY22-GS18 all carry AEC-Q101 qualification and Automotive grade designation, confirming suitability for automotive circuit applications.

Q: What packaging formats are available?

A: ZMY22-GS08 is supplied in Cut Tape (CT) format. ZM4748A-GS08 and ZMY22-GS18 are supplied in Tape & Reel (TR) format. Cut Tape is typically used for manual or small-batch assembly, while Tape & Reel supports automated pick-and-place equipment.

Q: Do these parts have moisture sensitivity concerns?

A: No. All three parts have Moisture Sensitivity Level (MSL) of 1 (Unlimited), indicating no special moisture handling or storage requirements.

Q: Are all parts RoHS and REACH compliant?

A: Yes. All three parts are ROHS3 Compliant and REACH Unaffected, meeting environmental and regulatory requirements for electronic component use.

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