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Vishay General Semiconductor - Diodes Division TZMC51-GS18
- Part No.:
- TZMC51-GS18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- DO-213AC, MINI-MELF, SOD-80
- Datasheet:
-
TZMC51-GS18.pdf
- Description:
- DIODE ZENER 51V 500MW SOD80
- Quantity:
- Payment:
- Shipping:
Inventory:5,442
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Product details
Overview
TZMC51-GS18 from Vishay Semiconductors is a precision small-signal Zener diode in MiniMELF (SOD-80) package, designed for voltage regulation and reference applications with nominal Zener voltage of 51 V, ±5 % tolerance, and 2.5 mA test current. It delivers low reverse leakage (< 0.1 μA at VR), dynamic resistance of 39 Ω at IZT1, and temperature coefficient of +0.04 to +0.12 %/K - enabling stable operation in power supply feedback loops and analog reference circuits.
For engineers reviewing the TZMC51-GS18 datasheet, TZMC51-GS18 pinout, TZMC51-GS18 application, or TZMC51-GS18 equivalent, key selection considerations include its 500 mW power rating, MiniMELF thermal performance (RthJA = 500 K/W on PCB), sharp reverse breakdown characteristic, and suitability for space-constrained industrial and automotive voltage stabilization designs.
Technical Context
This device operates as a single-element, silicon-based Zener diode with avalanche-dominated breakdown above 6 V, confirmed by its positive temperature coefficient (+0.04 to +0.12 %/K) and typical dynamic resistance of 39 Ω at 2.5 mA. Its construction uses UL 94 V-0 molding compound and achieves MSL level 1 per J-STD-020, supporting lead-free reflow up to 260 °C peak.
The TZMC51-GS18 exhibits very low reverse leakage (< 0.1 μA at VR = 48 V), sharp knee in the I–V curve, and high long-term stability - validated by Vishay's qualification testing for 175 °C maximum junction temperature and -65 to +175 °C storage range. It is not intended for surge suppression or transient clamping but optimized for precision DC voltage referencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 48 to 54 V (nominal 51 V); defines precise regulation point for feedback or reference circuits |
| Test Current (IZT) | 2.5 mA; standard bias condition for specifying VZ and dynamic resistance |
| Dynamic Resistance (ZZ) | 39 Ω at IZT; low impedance ensures minimal output voltage variation under load changes |
| Reverse Leakage (IR) | < 0.1 μA at VR = 48 V; enables ultra-low quiescent current in battery-powered references |
| Power Dissipation (Ptot) | 500 mW; supports continuous operation in compact layouts with adequate PCB copper area |
| Temperature Coefficient (TKVZ) | +0.04 to +0.12 %/K; predictable positive drift allows compensation in multi-diode reference strings |
| Junction Temperature (Tj) | 175 °C max; ensures reliability in under-hood automotive and industrial ambient environments |
Pinout & Package
MiniMELF (SOD-80) glass-metal package: cylindrical body (Ø1.4 mm × L3.3 mm), cathode identified by axial band, rated for surface-mount reflow (peak 260 °C), MSL level 1, weight ≈31 mg.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection | Connected to ground or lower potential node in shunt regulator configuration |
| Cathode | Zener breakdown terminal / high-side connection | Connected to input voltage source; regulates voltage across load tied between cathode and anode |
Key Features
| Feature | Design Value |
|---|---|
| Very sharp reverse characteristic | Enables clean, well-defined regulation knee at 51 V - critical for accurate threshold detection |
| Low reverse leakage current | < 0.1 μA at 48 V minimizes error in high-impedance reference dividers and battery-monitoring circuits |
| High long-term stability | Guaranteed parameter drift < 1 % over life - essential for calibration-critical instrumentation |
| Low noise performance | Reduces voltage reference jitter in ADC/DAC bias networks and precision op-amp circuits |
| ±5 % VZ tolerance (TZMC series) | Balances cost and accuracy for non-critical regulation; tighter alternatives (TZMB) available at ±2 % |
Applications
| Industrial Power Supply Feedback | Automotive Body Control Module Reference |
|---|---|
Use Scenario: Regulating 12 V or 24 V rail output via optocoupler feedback loop in isolated DC/DC converters. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 51 V reference to TL431-like controller ICs or discrete transistor comparators. Use Value: Maintains ±1 % output regulation across -40 to +125 °C ambient due to predictable TKVZ and low ZZ. |
Use Scenario: Generating stable bias voltage for sensor signal conditioning in BCM microcontrollers. IC Role / Device Role / Timing Role: Precision DC reference for ADC reference inputs and analog front-end gain-setting resistors. Use Value: Delivers sub-μA leakage and < 39 Ω dynamic impedance - minimizing offset drift and measurement error. |
| Test Equipment Voltage Calibration | Telecom Line Card Overvoltage Protection |
Use Scenario: Serving as secondary reference in portable multimeters and benchtop calibrators requiring traceable stability. IC Role / Device Role / Timing Role: Passive Zener element in stacked reference chains where long-term drift must be < 100 ppm/year. Use Value: Confirmed 175 °C Tj rating and UL 94 V-0 encapsulation support extended-life calibration hardware. |
Use Scenario: Clamping transient surges on 48 V telecom power buses while maintaining steady-state regulation. IC Role / Device Role / Timing Role: Primary shunt regulator during normal operation; absorbs brief overvoltage events up to Ptot limit. Use Value: 500 mW rating and sharp knee allow fast response to line transients without oscillation or thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX55-C51 (ON Semiconductor) | DO-35 package (larger footprint), 500 mW rating, ±5 % tolerance, 35 Ω ZZ at 5 mA | Higher thermal resistance (RthJA ≈ 550 K/W), less suitable for dense PCBs; requires larger pad layout | Select when legacy DO-35 compatibility or higher pulse current capability is required |
| TZMB51-GS18 (Vishay) | Same MiniMELF package, identical pinout and dimensions, but ±2 % VZ tolerance and tighter TKVZ (0.04 %/K min) | Delivers improved accuracy for metrology-grade references; same thermal and reliability specs | Choose for applications demanding tighter initial voltage tolerance without changing layout or assembly process |
Compared with BZX55-C51, TZMC51-GS18 offers superior board-space efficiency and thermal performance in MiniMELF; versus TZMB51-GS18, it trades ±2 % tolerance for lower cost while retaining identical reliability, stability, and package compatibility.
Availability
TZMC51-GS18 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, test equipment calibration circuits, and telecom line card designs requiring stable component supply with full traceability and lifecycle management.
Supply support for TZMC51-GS18 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 Semiconductors is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, and optoelectronics with rigorous AEC-Q101 and industrial qualification programs.
The TZM-Series Zener diodes are engineered for precision voltage reference and stabilization in harsh-environment applications - emphasizing low noise, sharp breakdown, and long-term parametric stability across wide temperature ranges.
FAQ
What is the Zener voltage tolerance for TZMC51-GS18?
The TZMC51-GS18 has a nominal Zener voltage of 51 V with a tolerance of ±5 %, meaning its actual breakdown voltage falls between 48 V and 54 V at 2.5 mA test current. This tolerance is defined per the TZMC series specification and is verified during production screening. The TZMC51-GS18 is distinct from the tighter-tolerance TZMB51-GS18 (±2 %), which shares the same package and thermal characteristics.
Can TZMC51-GS18 be used in surface-mount reflow processes?
Yes, TZMC51-GS18 is qualified for lead-free reflow soldering with a maximum peak temperature of 260 °C, compliant with J-STD-020. Its MiniMELF (SOD-80) package uses UL 94 V-0 molding compound and carries MSL level 1 rating - meaning it can be stored indefinitely at ambient conditions without baking prior to assembly. The device's glass-metal construction ensures mechanical robustness during thermal cycling.
What is the maximum power dissipation of TZMC51-GS18?
The absolute maximum power dissipation (Ptot) for TZMC51-GS18 is 500 mW at Tamb = 25 °C with RthJA ≤ 300 K/W. On a standard 50 mm × 50 mm × 1.6 mm PCB, RthJA is 500 K/W, limiting practical continuous dissipation to approximately 100 mW at 25 °C ambient. Derating is required above 25 °C per the datasheet's Ptot vs. Tamb curve - e.g., ~60 mW at 75 °C ambient.
Does TZMC51-GS18 have a specified forward voltage?
Yes, the forward voltage (VF) of TZMC51-GS18 is specified as a maximum of 1.5 V at IF = 200 mA. This parameter applies only during forward conduction and is relevant for polarity-check circuits or ESD protection configurations. In normal Zener operation, the device is reverse-biased; forward conduction is not part of its primary regulation function.
How does temperature affect the Zener voltage of TZMC51-GS18?
The temperature coefficient of Zener voltage (TKVZ) for TZMC51-GS18 is +0.04 to +0.12 %/K, indicating a predictable positive drift with rising junction temperature. At 51 V nominal, this corresponds to +20.4 to +61.2 mV/°C. This behavior is inherent to avalanche-mode breakdown and allows designers to compensate for thermal drift in precision reference designs using complementary components.
TZMC51-GS18 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):
- 51 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 125 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 39 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
TZMC51-GS18 FAQ
1.How can I place an order for TZMC51-GS18 through Aetrix?
Please submit a Request for Quotation (RFQ) for TZMC51-GS18 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 TZMC51-GS18 reliable?
The price and inventory of TZMC51-GS18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TZMC51-GS18 is usually 5 days.
3.What payment methods are accepted for TZMC51-GS18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TZMC51-GS18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TZMC51-GS18?
TZMC51-GS18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TZMC51-GS18 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 TZMC51-GS18?
For technical support, including TZMC51-GS18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TZMC51-GS18 requirements.
6.How does Aetrix verify that TZMC51-GS18 is sourced from the original manufacturer or authorized distributors?
All TZMC51-GS18 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 TZMC51-GS18 meets industry standards.
7.What is the process for return or replacement of TZMC51-GS18?
All TZMC51-GS18 units undergo pre-shipment inspection (PSI). If there is an issue with TZMC51-GS18, 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 TZMC51-GS18 part is unused and in its original packaging.
Return procedure for TZMC51-GS18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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