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Vishay General Semiconductor - Diodes Division TZMC56-GS18
- Part No.:
- TZMC56-GS18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- DO-213AC, MINI-MELF, SOD-80
- Datasheet:
-
TZMC56-GS18.pdf
- Description:
- DIODE ZENER 56V 500MW SOD80
- Quantity:
- Payment:
- Shipping:
Inventory:7,710
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Product details
Overview
TZMC56-GS18 from Vishay Semiconductors is a small-signal Zener diode with nominal zener voltage 56 V, ±5 % tolerance, 2.5 mA test current, and 500 mW power dissipation in MiniMELF (SOD-80) package - used for precision voltage stabilization in low-power analog reference and overvoltage protection circuits.
For engineers reviewing the TZMC56-GS18 datasheet, TZMC56-GS18 pinout, TZMC56-GS18 application, or TZMC56-GS18 equivalent, key selection criteria include zener voltage accuracy at 2.5 mA, dynamic resistance of 43 Ω, temperature coefficient of +0.04 to +0.12 %/K, and reverse leakage < 0.1 μA at 95 % VZmin.
Technical Context
This device operates as a single-element, silicon planar Zener diode optimized for stable voltage regulation under low-current conditions. Its sharp reverse breakdown characteristic and low noise support high-precision analog references.
Designed for operation up to 175 °C junction temperature, it exhibits a positive temperature coefficient above 6 V and maintains < 0.1 μA reverse leakage at VR = 52 V (95 % of minimum VZ) - critical for battery-powered and low-quiescent systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener voltage (VZ) | 52 to 60 V at IZT = 2.5 mA - defines stable regulation range for mid-voltage rail clamping |
| Power dissipation (Ptot) | 500 mW - sets maximum continuous power handling on standard PCB layout |
| Dynamic resistance (ZZ) | 43 Ω at IZT = 2.5 mA - determines output impedance and load regulation sensitivity |
| Reverse leakage (IR) | < 0.1 μA at VR = 52 V - ensures minimal standby current in always-on protection circuits |
| Temperature coefficient (TKVZ) | +0.04 to +0.12 %/K - quantifies voltage drift per degree Celsius rise in ambient or junction temp |
| Package | MiniMELF (SOD-80) - cylindrical glass-body surface-mount package with cathode band marking |
| Forward voltage (VF) | 1.5 V at IF = 200 mA - relevant for polarity-check or ESD clamp forward conduction |
Pinout & Package
MiniMELF (SOD-80) package: cylindrical glass body, 3.3–3.7 mm length, 1.4–1.6 mm diameter, cathode identified by a dark band. No separate leads - anode and cathode are axial terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive terminal in forward bias; connected to ground or lower-potential node in Zener mode | Current entry point during forward conduction; common reference node in shunt regulator topology |
| Cathode | Negative terminal in forward bias; connected to regulated voltage node in Zener mode | Output node where stable VZ is established; marked by visible band for orientation |
Key Features
| Feature | Design Value |
|---|---|
| Very sharp reverse characteristic | Enables precise knee detection and stable regulation at low test currents (2.5 mA) |
| Low reverse current level | Guarantees < 0.1 μA leakage at 95 % VZmin, minimizing error in high-impedance reference dividers |
| Very high stability | Rated for 175 °C max junction temperature and MSL Level 1 moisture sensitivity - supports industrial reliability |
| Low noise | Optimized semiconductor structure reduces broadband noise in analog reference applications |
| VZ tolerance ±5 % | Meets TZMC-series specification - tighter than general-purpose Zeners, suitable for calibrated thresholds |
Applications
| Industrial Sensor Reference | DC-DC Feedback Clamp |
|---|---|
Use Scenario: Providing stable 56 V reference for RTD or strain gauge signal conditioning in factory automation sensors. IC Role / Device Role / Timing Role: Shunt voltage reference element establishing fixed bias point for op-amp input stages. Use Value: Low 43 Ω dynamic resistance minimizes loading error on high-impedance bridge outputs. | Use Scenario: Clamping feedback node in isolated flyback converter to prevent overvoltage during transient load steps. IC Role / Device Role / Timing Role: Overvoltage protection element limiting optocoupler input voltage to safe levels. Use Value: 500 mW power rating absorbs short-duration energy surges without thermal runaway. |
| Battery Management Monitor | Test Equipment Voltage Standard |
Use Scenario: Monitoring 48 V telecom battery packs for end-of-charge detection using precision voltage thresholding. IC Role / Device Role / Timing Role: Zener-based comparator input reference in discrete voltage monitor circuit. Use Value: ±5 % VZ tolerance and +0.04 %/K TC enable repeatable 56 V trip point across -40 to +85 °C. | Use Scenario: Serving as traceable 56 V calibration standard in bench multimeters and source-measure units. IC Role / Device Role / Timing Role: Primary voltage reference in passive calibration subsystem. Use Value: High stability and low noise ensure < 10 ppm/h drift during extended measurement cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX55-C56 (Vishay) | DO-35 package, same 56 V nominal, ±5 %, but higher ZZ (60 Ω), higher IR (≤ 0.5 μA), lower Ptot (500 mW same but derated faster) | Through-hole assembly only; less suitable for high-density SMT layouts | Select when legacy through-hole design or manual rework is required |
| MMSZ5256B (ON Semiconductor) | SOD-123 package, same 56 V nominal, ±5 %, but ZZ = 50 Ω, IR ≤ 0.1 μA, Ptot = 500 mW, MSL Level 1 | Rectangular SMT footprint - different board layout and reflow profile | Select when SOD-123 compatibility or multi-source procurement is prioritized |
Compared with TZMC56-GS18, BZX55-C56 requires through-hole mounting and offers looser regulation due to higher dynamic resistance, while MMSZ5256B matches electrical specs closely but demands PCB redesign for its SOD-123 land pattern.
Availability
TZMC56-GS18 is available at Aetrix Electronics and suitable for industrial sensor reference, DC-DC feedback clamp, and battery management monitor applications requiring stable component supply and long-term obsolescence management.
Supply support for TZMC56-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 manufacturer of discrete semiconductors and passive components, specializing in high-reliability diodes, MOSFETs, and resistors for industrial and automotive markets.
The TZM-Series Zener diodes are designed for precision voltage stabilization in space-constrained, high-stability analog systems - emphasizing low noise, tight tolerance, and thermal robustness.
FAQ
What is the exact zener voltage range for TZMC56-GS18 at 2.5 mA test current?
TZMC56-GS18 has a guaranteed zener voltage range of 52 V (minimum) to 60 V (maximum) when tested at IZT = 2.5 mA and TA = 25 °C. The nominal value is 56 V, with ±5 % tolerance per TZMC-series specification. This range is confirmed in the Electrical Characteristics table on page 2 of Vishay document 84122 Rev. 1.8.
Does TZMC56-GS18 have a specified dynamic resistance, and what does it mean for circuit design?
Yes, TZMC56-GS18 has a typical dynamic resistance (ZZ) of 43 Ω at IZT = 2.5 mA. This value indicates how much the zener voltage changes per unit change in current - lower ZZ means better regulation under varying load conditions. In practice, a 1 mA current shift causes ~43 mV VZ variation, critical for high-accuracy reference designs.
What is the reverse leakage current specification for TZMC56-GS18, and under what conditions is it measured?
TZMC56-GS18 specifies reverse leakage current (IR) of < 0.1 μA at VR = 52 V (95 % of minimum VZ) and Tj = 25 °C. This ultra-low leakage ensures minimal error current in high-impedance voltage divider networks and extends battery life in always-on monitoring circuits.
Is TZMC56-GS18 compatible with lead-free reflow soldering processes?
Yes, TZMC56-GS18 is qualified for lead-free reflow soldering with a peak temperature of up to 260 °C, per J-STD-020 MSL Level 1 classification. Its MiniMELF (SOD-80) package uses UL 94 V-0 molding compound and withstands standard IPC/JEDEC profiles without degradation.
What is the temperature coefficient of TZMC56-GS18, and how does it affect long-term voltage stability?
TZMC56-GS18 has a temperature coefficient (TKVZ) ranging from +0.04 %/K to +0.12 %/K. This means its zener voltage increases by 0.04–0.12 % per Kelvin rise in junction temperature. At 56 V, this translates to +22 to +67 mV/°C drift - a key factor when designing for operation across -65 to +175 °C storage or extended industrial temperature ranges.
TZMC56-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):
- 56 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 135 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 43 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
TZMC56-GS18 FAQ
1.How can I place an order for TZMC56-GS18 through Aetrix?
Please submit a Request for Quotation (RFQ) for TZMC56-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 TZMC56-GS18 reliable?
The price and inventory of TZMC56-GS18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TZMC56-GS18 is usually 5 days.
3.What payment methods are accepted for TZMC56-GS18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TZMC56-GS18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TZMC56-GS18?
TZMC56-GS18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TZMC56-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 TZMC56-GS18?
For technical support, including TZMC56-GS18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TZMC56-GS18 requirements.
6.How does Aetrix verify that TZMC56-GS18 is sourced from the original manufacturer or authorized distributors?
All TZMC56-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 TZMC56-GS18 meets industry standards.
7.What is the process for return or replacement of TZMC56-GS18?
All TZMC56-GS18 units undergo pre-shipment inspection (PSI). If there is an issue with TZMC56-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 TZMC56-GS18 part is unused and in its original packaging.
Return procedure for TZMC56-GS18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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