TZMC22-GS18 Zener Diode Equivalent & Substitute Parts

Part Overview

The TZMC22-GS18 is an automotive-grade Zener diode manufactured by Vishay General Semiconductor - Diodes Division. This component is a 22 V, 500 mW surface mount device in SOD-80 MiniMELF packaging, qualified to AEC-Q101 automotive standards and compliant with ROHS3 and REACH regulations. The part is currently active in production with 725 pieces in stock. Substitute parts are identified when equivalent electrical performance is required due to inventory constraints, packaging format preferences, or specific application requirements while maintaining functional compatibility within the defined parameter tolerances.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	22	V
Tolerance	±5%	—
Power - Maximum	500	mW
Impedance (Maximum)	55	Ohms
Current - Reverse Leakage @ Vr	100	nA @ 16 V
Voltage - Forward (Maximum) @ If	1.5	V @ 200 mA
Operating Temperature Range	-65 to 175	°C
Grade	Automotive	—
Qualification	AEC-Q101	—
Mounting Type	Surface Mount	—
Package / Case	DO-213AC, MINI-MELF, SOD-80	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the TZMC22-GS18 are classified based on electrical parameter equivalence and packaging compatibility. The primary substitution criteria are:

Critical Parameters for Substitution:

Zener voltage: 22 V nominal
Maximum power dissipation: 500 mW
Surface mount technology with SOD-80 or equivalent MiniMELF packaging
Operating temperature range: minimum -65°C to 175°C
Automotive grade qualification or equivalent compliance

Parametric Equivalent Parts maintain identical or superior electrical specifications and packaging format, enabling direct replacement without circuit redesign.

Manufacturer Recommended Parts provide functional equivalence with allowable variations in secondary parameters such as impedance or forward voltage, suitable for applications where the primary zener voltage and power rating are the controlling factors.

Parameter Comparison

Parameter	TZMC22-GS18	TZMB22-GS08	TZMC22-GS08	CDLL4112	CLL5251B TR PBFREE
Manufacturer	Vishay	Vishay	Vishay	Microchip	Central Semiconductor
Voltage - Zener (Nom)	22 V	22 V	22 V	18 V	22 V
Tolerance	±5%	±2%	±5%	±5%	±5%
Power - Max	500 mW	500 mW	500 mW	500 mW	500 mW
Impedance (Max)	55 Ω	55 Ω	55 Ω	100 Ω	29 Ω
Current - Reverse Leakage @ Vr	100 nA @ 16 V	100 nA @ 16 V	100 nA @ 16 V	50 nA @ 13.7 V	100 nA @ 17 V
Voltage - Forward (Max) @ If	1.5 V @ 200 mA	1.5 V @ 200 mA	1.5 V @ 200 mA	1.1 V @ 200 mA	1.25 V @ 200 mA
Operating Temperature	-65 to 175°C	-65 to 175°C	-65 to 175°C	-65 to 175°C	-65 to 200°C
Grade	Automotive	Automotive	Automotive	—	—
Qualification	AEC-Q101	AEC-Q101	AEC-Q101	—	—
Package / Case	DO-213AC, MINI-MELF, SOD-80	DO-213AC, MINI-MELF, SOD-80	DO-213AC, MINI-MELF, SOD-80	DO-213AB, MELF	DO-213AC, MINI-MELF, SOD-80
Packaging Format	Tape & Reel (TR)	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®	Bulk	Tape & Reel (TR)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Non-Compliant	ROHS3 Compliant

Engineering Selection Recommendations

TZMB22-GS08 (Parametric Equivalent - Preferred)

The TZMB22-GS08 is a direct parametric equivalent with superior tolerance specification (±2% versus ±5%). Both devices are manufactured by Vishay, carry AEC-Q101 automotive qualification, and are ROHS3 compliant. The TZMB22-GS08 is supplied in Tape & Reel packaging identical to the main part. This substitute is suitable for applications requiring tighter voltage tolerance control. Inventory availability is significantly higher at 67,096 pieces.

TZMC22-GS08 (Parametric Equivalent - Packaging Variant)

The TZMC22-GS08 maintains identical electrical specifications and tolerance to the TZMC22-GS18 but is supplied in Cut Tape and Digi-Reel® format rather than standard Tape & Reel. Both are Vishay products with AEC-Q101 qualification and ROHS3 compliance. This substitute is applicable when alternative packaging formats are acceptable for assembly processes. Inventory is 17,600 pieces.

CLL5251B TR PBFREE (Functional Equivalent)

The CLL5251B TR PBFREE is manufactured by Central Semiconductor Corp and provides 22 V, 500 mW zener functionality in SOD-80 packaging with Tape & Reel delivery. This part is ROHS3 compliant with extended operating temperature range (-65°C to 200°C). The impedance is lower at 29 Ohms and forward voltage is 1.25 V at 200 mA. This substitute is suitable for applications where the primary zener voltage and power rating are the controlling design factors and automotive AEC-Q101 qualification is not required.

CDLL4112 (Limited Compatibility)

The CDLL4112 is a Microchip Technology zener diode with 18 V nominal voltage, differing from the 22 V specification of the main part. This part is not recommended as a direct substitute due to the 4 V voltage differential. The device is supplied in bulk packaging and is RoHS non-compliant. Selection of this part requires circuit redesign to accommodate the lower zener voltage.

Frequently Asked Questions (FAQ)

Q: Can TZMB22-GS08 replace TZMC22-GS18 in automotive applications?

A: Yes. Both devices are Vishay products with identical 22 V, 500 mW specifications, AEC-Q101 automotive qualification, and ROHS3 compliance. The TZMB22-GS08 offers superior voltage tolerance at ±2% compared to ±5%. Tape & Reel packaging is identical, enabling direct substitution in automated assembly processes.

Q: What is the difference between TZMC22-GS18 and TZMC22-GS08?

A: Both parts are identical in electrical specifications and tolerance (22 V, ±5%, 500 mW). The primary difference is packaging format: TZMC22-GS18 is supplied in standard Tape & Reel (TR), while TZMC22-GS08 is supplied in Cut Tape (CT) and Digi-Reel® format. Selection depends on assembly equipment compatibility and procurement preferences.

Q: Is CLL5251B TR PBFREE suitable for automotive applications?

A: The CLL5251B TR PBFREE provides equivalent 22 V, 500 mW zener functionality and is ROHS3 compliant. However, this part is not qualified to AEC-Q101 automotive standards. Use is restricted to non-automotive applications or applications where automotive qualification is not a design requirement.

Q: Why is CDLL4112 listed as a substitute if the voltage is different?

A: The CDLL4112 is listed as a manufacturer-recommended part but is not a direct substitute due to its 18 V nominal voltage specification. This part is applicable only in circuit designs where the lower zener voltage is acceptable and circuit redesign has been performed. Direct substitution without circuit modification is not supported.

Q: What packaging formats are available for 22 V, 500 mW zener diodes?

A: The TZMC22-GS18 and equivalent parts are available in Tape & Reel (TR), Cut Tape (CT) with Digi-Reel®, and bulk packaging formats. All variants maintain SOD-80 MiniMELF or DO-213AC case geometry. Selection of packaging format is determined by assembly process requirements and procurement volume.

Q: Are all substitute parts ROHS3 compliant?

A: The TZMC22-GS18, TZMB22-GS08, TZMC22-GS08, and CLL5251B TR PBFREE are all ROHS3 compliant. The CDLL4112 is RoHS non-compliant and is subject to regulatory restrictions in applications requiring RoHS compliance.

Q: What is the moisture sensitivity level for these zener diodes?

A: All listed parts carry Moisture Sensitivity Level (MSL) 1, indicating unlimited shelf life without moisture control requirements. Standard storage conditions are acceptable for all substitute parts.

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