TZMB36-GS18 Equivalent & Substitute Parts

Part Overview

The TZMB36-GS18 is a Zener diode rated at 36 V nominal with 500 mW power dissipation in a surface mount SOD-80 MiniMELF package. Manufactured by Vishay General Semiconductor - Diodes Division, this component is qualified to AEC-Q101 automotive standards and carries Active product status. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, supply chain disruptions, or design flexibility needs.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	36	V
Tolerance	±2%	—
Power - Max	500	mW
Impedance (Max)	80	Ohms
Current - Reverse Leakage @ Vr	100	nA @ 27 V
Voltage - Forward (Vf) (Max) @ If	1.5	V @ 200 mA
Operating Temperature Range	-65 to 175	°C
Package / Case	DO-213AC, MINI-MELF, SOD-80	—
Mounting Type	Surface Mount	—
Grade	Automotive	—
Qualification	AEC-Q101	—

Substitute Part Grouping Explanation

Substitution of the TZMB36-GS18 is determined by strict equivalence in the following electrical and mechanical parameters:

Zener Voltage (Nominal): 36 V
Power Dissipation: 500 mW
Package Type: SOD-80 MiniMELF (DO-213AC)
Mounting Configuration: Surface Mount
Reverse Leakage Current: 100 nA @ 27 V

Substitute parts must maintain the same nominal zener voltage and power rating to ensure functional compatibility in the circuit. Package and mounting type equivalence is mandatory for mechanical fit and assembly compatibility. Tolerance, impedance, forward voltage, and operating temperature range variations are permitted within the constraints of the application circuit design.

Parameter Comparison

Parameter	TZMB36-GS18	TZMB36-GS08	CLL5258B TR TIN/LEAD
Manufacturer	Vishay General Semiconductor	Vishay General Semiconductor	Central Semiconductor Corp
Voltage - Zener (Nom)	36 V	36 V	36 V
Tolerance	±2%	±2%	±5%
Power - Max	500 mW	500 mW	500 mW
Impedance (Max)	80 Ohms	80 Ohms	70 Ohms
Current - Reverse Leakage @ Vr	100 nA @ 27 V	100 nA @ 27 V	100 nA @ 27 V
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 200 mA	1.5 V @ 200 mA	1.25 V @ 200 mA
Operating Temperature Range	-65 to 175°C	-65 to 175°C	-65 to 200°C
Package / Case	DO-213AC, MINI-MELF, SOD-80	DO-213AC, MINI-MELF, SOD-80	DO-213AC, MINI-MELF, SOD-80
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Grade	Automotive	Automotive	—
Qualification	AEC-Q101	AEC-Q101	—
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant
Product Status	Active	Active	Active

Engineering Selection Recommendations

TZMB36-GS08 is a parametric equivalent to the TZMB36-GS18. Both parts are manufactured by Vishay General Semiconductor, share identical electrical specifications (36 V nominal, ±2% tolerance, 500 mW power, 80 Ohms impedance), and carry AEC-Q101 automotive qualification with ROHS3 compliance. This substitute provides direct functional and mechanical interchangeability with no design modifications required.

CLL5258B TR TIN/LEAD is a manufacturer-recommended alternative from Central Semiconductor Corp. This part maintains the core electrical requirements (36 V nominal, 500 mW power, SOD-80 package) but differs in the following aspects: tolerance specification (±5% versus ±2%), impedance (70 Ohms versus 80 Ohms), forward voltage (1.25 V versus 1.5 V at 200 mA), and extended operating temperature range (-65 to 200°C versus -65 to 175°C). This part does not carry automotive qualification or RoHS3 compliance. Selection of this substitute requires circuit design verification to confirm tolerance and impedance variations are acceptable for the application.

Frequently Asked Questions (FAQ)

Q: Can TZMB36-GS08 be used as a direct replacement for TZMB36-GS18?

A: Yes. Both parts are identical in nominal zener voltage (36 V), power rating (500 mW), tolerance (±2%), impedance (80 Ohms), and package type (SOD-80 MiniMELF). Both carry AEC-Q101 automotive qualification and ROHS3 compliance. No circuit modifications are required.

Q: What are the key differences between TZMB36-GS18 and CLL5258B TR TIN/LEAD?

A: The CLL5258B differs in three electrical parameters: tolerance (±5% versus ±2%), impedance (70 Ohms versus 80 Ohms), and forward voltage (1.25 V versus 1.5 V at 200 mA). Additionally, the CLL5258B lacks automotive qualification and RoHS3 compliance. The CLL5258B does provide an extended operating temperature range to 200°C.

Q: Is the CLL5258B suitable for automotive applications?

A: The CLL5258B is not qualified to AEC-Q101 automotive standards and is not RoHS3 compliant. Use in automotive applications requires design review and customer approval.

Q: Are all three parts mechanically compatible?

A: Yes. All three parts use the SOD-80 MiniMELF package (DO-213AC) in surface mount configuration. Mechanical fit and assembly compatibility are identical.

Q: Does tolerance variation affect circuit performance?

A: Tolerance variation between ±2% (TZMB36-GS18, TZMB36-GS08) and ±5% (CLL5258B) affects the precision of zener voltage regulation. Applications requiring tight voltage regulation should use parts with ±2% tolerance. Applications with wider voltage tolerance margins may accept ±5% tolerance.

Q: What is the significance of impedance differences?

A: Impedance affects the dynamic response of the zener diode under transient conditions. The 10 Ohm difference between TZMB36-GS18 (80 Ohms) and CLL5258B (70 Ohms) may impact circuit performance in high-frequency or fast-transient applications. Circuit simulation or testing is necessary to determine acceptability.

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