TLZ22C-GS18 Equivalent & Substitute Parts

Part Overview

The TLZ22C-GS18 is an active zener diode manufactured by Vishay General Semiconductor - Diodes Division, designed for voltage regulation and protection applications. This surface mount component operates at a nominal zener voltage of 22 V with a maximum power dissipation of 500 mW in a compact SOD-80 MiniMELF package. The part is ROHS3 compliant and carries unlimited moisture sensitivity rating (MSL 1), making it suitable for standard manufacturing environments. Equivalent and substitute parts are identified to provide design flexibility, supply chain alternatives, and component availability options for applications requiring identical electrical and mechanical specifications.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	22	V
Power - Max	500	mW
Impedance (Max)	30	Ohms
Current - Reverse Leakage @ Vr	40 nA @ 20 V	nA
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 200 mA	V
Operating Temperature Range	-65 to 175	°C
Package / Case	DO-213AC, MINI-MELF, SOD-80	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the TLZ22C-GS18 are qualified based on the following electrical and mechanical parameters:

Primary Substitution Criteria:

Nominal zener voltage of 22 V
Maximum power dissipation of 500 mW
Surface mount package type (SOD-80 MiniMELF)
Identical mechanical footprint (DO-213AC)
Operating temperature range compatibility
RoHS3 compliance and MSL 1 rating

Allowed Parameter Variations:

Zener voltage tolerance: Specified tolerance values permitted
Impedance (Zzt): Maximum 30 Ohms or lower
Reverse leakage current: Specified at different voltage conditions
Forward voltage: Specified at identical current conditions
Operating temperature upper limit: Equal to or exceeding 175°C

The substitute part CLL5251B TR PBFREE meets all primary substitution criteria and operates within the allowed parameter variations for direct circuit replacement.

Parameter Comparison

Parameter	TLZ22C-GS18 (Vishay)	CLL5251B TR PBFREE (Central Semiconductor)	Compatibility
Voltage - Zener (Nom)	22 V	22 V	Identical
Tolerance	—	±5%	Substitute specified
Power - Max	500 mW	500 mW	Identical
Impedance (Max)	30 Ohms	29 Ohms	Substitute lower
Current - Reverse Leakage @ Vr	40 nA @ 20 V	100 nA @ 17 V	Substitute higher
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 200 mA	1.25 V @ 200 mA	Substitute lower
Operating Temperature Range	-65 to 175°C	-65 to 200°C	Substitute extended
Package / Case	DO-213AC, MINI-MELF, SOD-80	DO-213AC, MINI-MELF, SOD-80	Identical
Mounting Type	Surface Mount	Surface Mount	Identical
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Identical

Engineering Selection Recommendations

TLZ22C-GS18 (Vishay General Semiconductor - Diodes Division)

Select this part when the original design specification requires the Vishay TLZ series characteristics. The part is active and in stock with 919 units available. ROHS3 compliance and unlimited MSL rating support standard manufacturing processes. The component is suitable for applications requiring the specified impedance and leakage characteristics.

CLL5251B TR PBFREE (Central Semiconductor Corp)

This substitute part is active and available with 3,791 units in stock. It provides equivalent electrical function with improved performance characteristics: lower impedance (29 Ohms vs. 30 Ohms), lower forward voltage (1.25 V vs. 1.5 V), and extended operating temperature range (-65 to 200°C vs. -65 to 175°C). The part carries ±5% zener voltage tolerance and maintains ROHS3 compliance and MSL 1 rating. Both parts are identical in package configuration and mounting type, enabling direct PCB-level substitution.

Frequently Asked Questions (FAQ)

Q: Can CLL5251B TR PBFREE replace TLZ22C-GS18 in existing designs?

A: Yes. Both parts share identical nominal zener voltage (22 V), maximum power dissipation (500 mW), package type (SOD-80 MiniMELF), and mounting configuration (surface mount). The substitute part operates within the allowed parameter variations and maintains compliance certifications.

Q: What are the key differences between these parts?

A: The CLL5251B TR PBFREE features lower impedance (29 Ohms vs. 30 Ohms), lower forward voltage (1.25 V vs. 1.5 V at 200 mA), and extended maximum operating temperature (200°C vs. 175°C). The substitute part includes specified ±5% zener voltage tolerance. Reverse leakage current is measured at different voltage conditions (17 V vs. 20 V).

Q: Are the mechanical packages identical?

A: Yes. Both parts use the DO-213AC MiniMELF SOD-80 package with identical footprint and pin configuration, enabling direct PCB substitution without layout modifications.

Q: Do both parts meet compliance requirements?

A: Yes. Both TLZ22C-GS18 and CLL5251B TR PBFREE are ROHS3 compliant, carry MSL 1 (unlimited) moisture sensitivity rating, and are REACH unaffected. Both support standard manufacturing and assembly processes.

Q: Which part should be selected for new designs?

A: Selection depends on design requirements and supply chain considerations. The CLL5251B TR PBFREE offers improved electrical characteristics (lower impedance and forward voltage) and extended temperature range. The TLZ22C-GS18 maintains the original Vishay specification. Both parts are active and suitable for production use.

Q: Can these parts be mixed in the same production batch?

A: Yes. Both parts meet identical electrical and mechanical specifications within the allowed parameter variations, enabling interchangeable use in manufacturing and assembly processes.

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