TZMC15-GS18 Equivalent & Substitute Parts

Part Overview

The TZMC15-GS18 is a Zener diode rated at 15 V, 500 mW, manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component is packaged in SOD-80 MiniMELF configuration and is qualified to AEC-Q101 automotive standards. The part is currently active with 315,300 units in stock. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across the specified parameter range, enabling design flexibility and supply chain optimization.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	15	V
Tolerance	±5%	—
Power - Max	500	mW
Impedance (Max)	30	Ohms
Current - Reverse Leakage @ Vr	100 nA @ 11 V	—
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 200 mA	—
Operating Temperature	-65°C ~ 175°C	—
Grade	Automotive	—
Qualification	AEC-Q101	—
Mounting Type	Surface Mount	—
Package / Case	DO-213AC, MINI-MELF, SOD-80	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the TZMC15-GS18 are classified into two categories based on electrical and mechanical compatibility:

Category 1: Manufacturer Recommended Substitutes (Same Packaging) These parts maintain identical or equivalent electrical specifications and packaging format (SOD-80 MiniMELF), differing only in tolerance, packaging configuration (Cut Tape vs. Tape & Reel), or series designation. They are direct functional replacements.

Category 2: Parametric Equivalents (Alternative Packaging) These parts meet the core electrical requirements (15 V nominal, 500 mW power rating, automotive grade, AEC-Q101 qualification) but utilize different package formats (DO-213AA, DO-213AB MELF). Selection depends on PCB design and assembly process compatibility.

Key Parameters Determining Substitution:

Voltage - Zener (Nom): 15 V (fixed across all substitutes)
Power - Max: 500 mW (fixed across all substitutes)
Mounting Type: Surface Mount (fixed across all substitutes)
Operating Temperature: -65°C ~ 175°C (fixed across all substitutes)
Grade: Automotive (fixed across all substitutes)
Qualification: AEC-Q101 (fixed across all substitutes)
Tolerance: ±2% to ±6% (acceptable variance)
Impedance (Max): 16 to 100 Ohms (acceptable variance)
Package / Case: SOD-80, DO-213AA, DO-213AB (mechanical compatibility dependent on design)

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Tolerance	Power (Max)	Zzt (Max)	Vf (Max) @ If	Package	Packaging Type	AEC-Q101	RoHS Status
TZMC15-GS18	Vishay	15 V	±5%	500 mW	30 Ω	1.5 V @ 200 mA	SOD-80	Cut Tape (CT)	Yes	ROHS3 Compliant
TZMC15-GS08	Vishay	15 V	±6%	500 mW	—	1.5 V @ 200 mA	SOD-80	CT & Digi-Reel®	Yes	ROHS3 Compliant
TZMB15-GS08	Vishay	15 V	±2%	500 mW	30 Ω	1.5 V @ 200 mA	SOD-80	Tape & Reel (TR)	Yes	ROHS3 Compliant
TZMB15-GS18	Vishay	15 V	±2%	500 mW	30 Ω	1.5 V @ 200 mA	SOD-80	Tape & Reel (TR)	Yes	ROHS3 Compliant
TZMC15-M-08	Vishay	15 V	±5%	500 mW	30 Ω	1.5 V @ 200 mA	SOD-80	Tape & Reel (TR)	Yes	ROHS3 Compliant
TZMC15-M-18	Vishay	15 V	±5%	500 mW	30 Ω	1.5 V @ 200 mA	SOD-80	Tape & Reel (TR)	Yes	ROHS3 Compliant
1N4109UR-1	Microchip Technology	15 V	±5%	500 mW	100 Ω	1.1 V @ 200 mA	DO-213AA	Bulk	No	RoHS non-compliant
CDLL5245B	Microchip Technology	15 V	±5%	—	16 Ω	1.1 V @ 200 mA	DO-213AB	Bulk	No	RoHS non-compliant
CDLL965B	Microchip Technology	15 V	±5%	500 mW	16 Ω	1.1 V @ 200 mA	DO-213AB	Bulk	No	RoHS non-compliant

Engineering Selection Recommendations

Vishay TZM Series (TZMC15-GS08, TZMB15-GS08, TZMB15-GS18, TZMC15-M-08, TZMC15-M-18)

All Vishay substitutes maintain full AEC-Q101 automotive qualification and ROHS3 compliance. Selection among these parts is determined by packaging configuration requirements:

TZMC15-GS08: Recommended for applications requiring Cut Tape or Digi-Reel® packaging with ±6% tolerance specification.
TZMB15-GS08 and TZMB15-GS18: Recommended for Tape & Reel applications requiring tighter ±2% tolerance specification. TZMB15-GS18 has limited inventory (851 units).
TZMC15-M-08 and TZMC15-M-18: Recommended for Tape & Reel applications with ±5% tolerance specification. Both maintain identical electrical performance to the main part.

Microchip Technology Alternatives (1N4109UR-1, CDLL5245B, CDLL965B)

These parts meet the 15 V nominal voltage and automotive temperature range requirements but do not carry AEC-Q101 qualification and are RoHS non-compliant. Use is restricted to applications where automotive qualification is not mandated and RoHS compliance is not required. Package formats differ (DO-213AA, DO-213AB) and require PCB design verification.

Frequently Asked Questions (FAQ)

Q: Can TZMC15-GS08 directly replace TZMC15-GS18?

A: Yes. Both parts share identical electrical specifications (15 V, 500 mW, ±5% tolerance for TZMC15-GS18 and ±6% for TZMC15-GS08), SOD-80 MiniMELF packaging, AEC-Q101 qualification, and ROHS3 compliance. The primary difference is packaging configuration (Cut Tape vs. Cut Tape & Digi-Reel®). Verify packaging compatibility with your assembly process.

Q: What is the difference between TZMB15 and TZMC15 series?

A: The TZMB15 series offers tighter tolerance (±2%) compared to TZMC15 (±5%). Both series maintain identical voltage rating, power rating, impedance, and operating temperature range. TZMB15 is suitable for applications requiring higher voltage accuracy.

Q: Are Microchip alternatives suitable for automotive applications?

A: Microchip alternatives (1N4109UR-1, CDLL5245B, CDLL965B) do not carry AEC-Q101 qualification and are RoHS non-compliant. These parts are not suitable for automotive applications requiring these certifications. Use only in non-automotive or non-regulated applications.

Q: What is the impact of different package formats (SOD-80 vs. DO-213AA vs. DO-213AB)?

A: Package format affects PCB footprint, assembly compatibility, and thermal performance. SOD-80 (MiniMELF) is the original specification. DO-213AA and DO-213AB are alternative MELF formats with different dimensions. Substitution requires PCB design verification to confirm footprint compatibility and thermal requirements are met.

Q: Can I substitute a part with higher impedance (Zzt)?

A: Impedance variation affects circuit performance in voltage regulation applications. The main part specifies 30 Ω maximum. Microchip alternatives range from 16 Ω to 100 Ω. Higher impedance may impact voltage stability. Verify circuit performance requirements before substitution.

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

A: Reverse leakage current affects standby power consumption and circuit performance. The main part specifies 100 nA @ 11 V. Microchip 1N4109UR-1 specifies 50 nA @ 11.4 V (lower leakage), while CDLL965B specifies 500 nA @ 11 V (higher leakage). Verify application sensitivity to leakage current before substitution.

Q: Are all substitutes available in equivalent quantities?

A: Inventory varies significantly. TZMC15-GS18 has 315,300 units in stock. TZMB15-GS18 has only 851 units. Microchip alternatives have 1,000–1,200 units. Verify availability for production volume requirements.

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