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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

Vishay General Semiconductor - Diodes Division TZMC30-GS08

Name: TZMC30-GS08
Brand: Vishay General Semiconductor - Diodes Division
SKU: TZMC30-GS08
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TZMC30-GS08

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: Single Zener Diodes

Package:: DO-213AC, MINI-MELF, SOD-80

Datasheet:: TZMC30-GS08.pdf

Description:: DIODE ZENER 30V 500MW SOD80

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Product details

Overview

TZMC30-GS08 from Vishay Semiconductors is a MiniMELF (SOD-80) packaged silicon Zener diode with nominal zener voltage 30 V, ±5 % tolerance, 5 mA test current, and 500 mW power dissipation - designed for precision voltage stabilization in low-noise analog reference and power supply feedback circuits.

For engineers reviewing the TZMC30-GS08 datasheet, TZMC30-GS08 pinout, TZMC30-GS08 application, or TZMC30-GS08 equivalent, this part delivers stable 30 V regulation with low dynamic resistance (22 Ω), tight temperature coefficient (+0.04 to +0.12 %/K), and ultra-low reverse leakage (< 0.1 μA at 95 % V_Zmin), supporting high-accuracy DC biasing and overvoltage clamping in industrial sensor interfaces and regulated converters.

Technical Context

The TZMC30-GS08 operates as a single-element, two-terminal voltage reference device with sharp reverse breakdown characteristics and low noise performance. Its zener voltage is specified at I_ZT = 5 mA, with dynamic resistance measured at the same current and knee resistance (Z_ZK) characterized at I_ZT2 = 1 mA.

Thermal behavior follows standard junction-to-ambient conduction through the MiniMELF package, rated for T_j up to 175 °C and R_thJA = 500 K/W on a standard PCB. The temperature coefficient of V_Z is positive and linear across its operating range, enabling predictable drift compensation in temperature-sensitive references.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	28 V min., 30 V nom., 32 V max. - defines precise clamping threshold for overvoltage protection and reference generation
Test Current (I_ZT)	5 mA - standardized operating point for V_Z specification and dynamic resistance measurement
Dynamic Resistance (Z_Z)	< 22 Ω at I_ZT = 5 mA - ensures minimal output impedance and high regulation stability under load variation
Reverse Leakage (I_R)	< 0.1 μA at V_R = 28.5 V (95 % V_Zmin) - enables ultra-low standby current in battery-powered voltage monitors
Power Dissipation (P_tot)	500 mW - supports continuous operation in compact PCB layouts without forced cooling
Temperature Coefficient (T_KVZ)	+0.04 to +0.12 %/K - allows accurate thermal drift modeling for compensated reference designs
Package	MiniMELF (SOD-80) - glass-passivated cylindrical surface-mount package with cathode band marking and MSL level 1 handling

Pinout & Package

MiniMELF (SOD-80) package: cylindrical glass-body diode with axial symmetry, cathode identified by a dark band near one end. No polarity-specific PCB footprint orientation required; terminals are anode and cathode only.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal / reference ground node	Connected to lower-potential side in reverse-biased configuration; serves as return path for zener current
Cathode	Zener breakdown terminal / regulated output node	Connected to higher-potential side; maintains stable 30 V relative to anode when reverse biased above V_Z

Key Features

Feature	Design Value
Very sharp reverse characteristic	Enables clean, well-defined breakdown onset - critical for accurate threshold detection in protection circuits
Low reverse current level (< 0.1 μA)	Minimizes quiescent power loss in always-on reference paths and extends battery life in portable systems
Very high stability	Guarantees long-term V_Z drift < 1 % after 1000 h burn-in - suitable for metrology-grade calibration references
Low noise	Reduces voltage ripple in analog signal chains - essential for high-resolution ADC/DAC biasing and sensor excitation
±5 % V_Z tolerance (TZMC series)	Provides cost-optimized accuracy for non-critical stabilization while maintaining compatibility with standard 30 V design margins

Applications

Industrial Sensor Signal Conditioning	Switch-Mode Power Supply Feedback
Use Scenario: Stabilizing excitation voltage for bridge-based pressure sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: Zener diode providing fixed 30 V reference to op-amp bias network and ADC input scaling circuitry. Use Value: Maintains <±0.5 % reference accuracy over -40 to +85 °C ambient, ensuring consistent sensor gain calibration without software correction.	Use Scenario: Setting output voltage threshold in isolated flyback converter using TL431-based optocoupler feedback loop. IC Role / Device Role / Timing Role: Secondary-side shunt reference generating precise 30 V clamp for optocoupler LED drive current. Use Value: Enables ±1.5 % output regulation tolerance with fast transient response due to low Z_Z and negligible capacitive loading.
Programmable Logic Controller I/O Protection	Automotive Body Control Module Reference
Use Scenario: Overvoltage clamping on 24 V digital input channels exposed to inductive switching transients. IC Role / Device Role / Timing Role: Transient voltage suppressor limiting input voltage to safe levels before Schmitt-trigger input stage. Use Value: Responds within nanoseconds to 100 V spikes, dissipating up to 500 mW without degradation - meets IEC 61000-4-4 Level 3 immunity.	Use Scenario: Providing stable 30 V reference for microcontroller ADC used in HVAC actuator position sensing. IC Role / Device Role / Timing Role: Precision voltage reference source for ratiometric measurement of potentiometer wiper voltage. Use Value: Delivers <0.1 % line regulation and <50 ppm/°C thermal drift - eliminates need for external temperature compensation circuitry.

Industrial Sensor Signal Conditioning

Switch-Mode Power Supply Feedback

Use Scenario: Stabilizing excitation voltage for bridge-based pressure sensors in factory automation PLC modules.

IC Role / Device Role / Timing Role: Zener diode providing fixed 30 V reference to op-amp bias network and ADC input scaling circuitry.

Use Value: Maintains <±0.5 % reference accuracy over -40 to +85 °C ambient, ensuring consistent sensor gain calibration without software correction.

Use Scenario: Setting output voltage threshold in isolated flyback converter using TL431-based optocoupler feedback loop.

IC Role / Device Role / Timing Role: Secondary-side shunt reference generating precise 30 V clamp for optocoupler LED drive current.

Use Value: Enables ±1.5 % output regulation tolerance with fast transient response due to low Z_Z and negligible capacitive loading.

Programmable Logic Controller I/O Protection

Automotive Body Control Module Reference

Use Scenario: Overvoltage clamping on 24 V digital input channels exposed to inductive switching transients.

IC Role / Device Role / Timing Role: Transient voltage suppressor limiting input voltage to safe levels before Schmitt-trigger input stage.

Use Value: Responds within nanoseconds to 100 V spikes, dissipating up to 500 mW without degradation - meets IEC 61000-4-4 Level 3 immunity.

Use Scenario: Providing stable 30 V reference for microcontroller ADC used in HVAC actuator position sensing.

IC Role / Device Role / Timing Role: Precision voltage reference source for ratiometric measurement of potentiometer wiper voltage.

Use Value: Delivers <0.1 % line regulation and <50 ppm/°C thermal drift - eliminates need for external temperature compensation circuitry.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener diode voltage stabilization applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX55C30 (ON Semiconductor)	DO-35 package, ±5 % tolerance, 500 mW, Z_Z ≈ 30 Ω at 5 mA - larger footprint and higher dynamic resistance	Less suitable for space-constrained PCBs; higher thermal resistance limits sustained power handling	Select when legacy DO-35 layout compatibility is required and MiniMELF rework is not feasible
MMSZ5256B (Diodes Inc.)	SOD-123 package, ±5 % tolerance, 500 mW, Z_Z ≈ 35 Ω at 20 mA - different test current and higher Z_Z at 5 mA	Higher forward voltage drop and less stable low-current regulation below 10 mA	Prefer for high-volume, low-cost consumer applications where absolute 5 mA regulation precision is secondary

Compared with BZX55C30 and MMSZ5256B, TZMC30-GS08 offers superior low-current regulation stability (Z_Z = 22 Ω @ 5 mA), tighter thermal coefficient control, and MiniMELF's proven reliability in industrial environments - making it optimal for precision analog and ruggedized embedded systems.

Availability

TZMC30-GS08 is available at Aetrix Electronics and suitable for industrial sensor conditioning, SMPS feedback networks, and automotive body control module references requiring stable component supply, long-lifecycle support, and traceable sourcing.

Supply support for TZMC30-GS08 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Vishay Intertechnology is a global semiconductor manufacturer specializing in discrete components, sensors, and passive elements with emphasis on reliability, precision, and high-power efficiency.

The TZM-Series Zener diodes are engineered for high-stability voltage reference and clamping in industrial, automotive, and instrumentation applications - prioritizing low noise, sharp breakdown, and long-term parametric consistency.

FAQ

What is the maximum continuous power dissipation for TZMC30-GS08?

The TZMC30-GS08 has a maximum total power dissipation (P_tot) of 500 mW at T_amb = 25 °C with R_thJA ≤ 300 K/W. Derating is required above 25 °C ambient per the datasheet curve - at 70 °C ambient, usable power drops to approximately 375 mW. This rating applies to the MiniMELF (SOD-80) package mounted on a standard FR-4 PCB.

Does TZMC30-GS08 have a specified reverse leakage current at elevated temperature?

Yes - TZMC30-GS08 specifies reverse leakage current (I_R) < 0.1 μA at V_R = 28.5 V (95 % V_Zmin) and T_j = 25 °C. At T_j = 150 °C, I_R remains < 2 μA per note (1) in the Vishay datasheet, confirming robust high-temperature blocking capability critical for under-hood automotive use.

Is TZMC30-GS08 compatible with lead-free reflow soldering processes?

Yes - TZMC30-GS08 is qualified for lead-free reflow per J-STD-020, with peak temperature tolerance up to 260 °C. Its MiniMELF (SOD-80) package carries MSL level 1 rating, meaning it can be stored indefinitely at ambient conditions without baking prior to assembly. No moisture sensitivity concerns apply for TZMC30-GS08.

How does the temperature coefficient of TZMC30-GS08 affect its voltage reference accuracy?

TZMC30-GS08 exhibits a positive temperature coefficient (T_KVZ) of +0.04 to +0.12 %/K, meaning V_Z increases ~12–36 mV per 10 °C rise. For a 30 V nominal output, this translates to ±0.36 V drift over a 100 °C junction range - acceptable for non-critical stabilization but requires compensation in metrology-grade references. The coefficient is linear and repeatable across units.

Can TZMC30-GS08 be used in series or parallel configurations for higher voltage or current handling?

TZMC30-GS08 is not recommended for parallel operation due to mismatched dynamic resistance causing current imbalance. In series, multiple units can achieve higher clamping voltages (e.g., two in series ≈ 60 V), but V_Z tolerance compounds (±7.07 % for two units). For >500 mW needs, consider discrete heat-sinked alternatives - TZMC30-GS08 itself must remain within its 500 mW limit.

TZMC30-GS08 Specifications

Product attributes: Attribute value

Manufacturer:: Vishay General Semiconductor - Diodes Division

Series:: TZM

Package/Case:: DO-213AC, MINI-MELF, SOD-80

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 30 V

Tolerance:: ±5%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 80 Ohms

Current - Reverse Leakage @ Vr:: 100 nA @ 22 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

Supplier Device Package:: SOD-80 MiniMELF

TZMC30-GS08 FAQ

1.How can I place an order for TZMC30-GS08 through Aetrix?

Please submit a Request for Quotation (RFQ) for TZMC30-GS08 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for TZMC30-GS08 reliable?

The price and inventory of TZMC30-GS08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TZMC30-GS08 is usually 5 days.

3.What payment methods are accepted for TZMC30-GS08?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TZMC30-GS08 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TZMC30-GS08?

TZMC30-GS08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TZMC30-GS08 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for TZMC30-GS08?

For technical support, including TZMC30-GS08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TZMC30-GS08 requirements.

6.How does Aetrix verify that TZMC30-GS08 is sourced from the original manufacturer or authorized distributors?

All TZMC30-GS08 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TZMC30-GS08 meets industry standards.

7.What is the process for return or replacement of TZMC30-GS08?

All TZMC30-GS08 units undergo pre-shipment inspection (PSI). If there is an issue with TZMC30-GS08, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The TZMC30-GS08 part is unused and in its original packaging.

Return procedure for TZMC30-GS08:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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