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Vishay General Semiconductor - Diodes Division TZQ5263B-GS18
- Part No.:
- TZQ5263B-GS18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- SOD-80 Variant
- Datasheet:
-
TZQ5263B-GS18.pdf
- Description:
- DIODE ZENER 56V 500MW SOD80
- Quantity:
- Payment:
- Shipping:
Inventory:9,664
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Product details
Overview
TZQ5263B-GS18 from Vishay Semiconductors is a precision small-signal Zener diode with nominal zener voltage of 56 V, ±5 % tolerance, 2.2 mA test current (IZT), < 0.1 μA reverse leakage at VR, and dynamic resistance of 43 Ω at IZT - designed for stable voltage reference and regulation in low-power analog circuits.
For engineers reviewing the TZQ5263B-GS18 datasheet, TZQ5263B-GS18 pinout, TZQ5263B-GS18 application, or TZQ5263B-GS18 equivalent, key selection criteria include its QuadroMELF SOD-80 package, +0.096 %/K temperature coefficient, 500 mW power rating, and suitability for precision biasing, overvoltage clamping, and feedback sensing in industrial control and instrumentation.
Technical Context
This device operates as a single-element, silicon planar Zener diode optimized for DC voltage stabilization under thermal equilibrium conditions (case temperature maintained at 30 °C ± 2 °C). Its sharp reverse breakdown characteristic and low noise support high-accuracy reference functions in analog signal chains.
The TZQ5263B-GS18 exhibits a positive temperature coefficient (+0.096 %/K), indicating increasing VZ with junction temperature - a critical factor when designing temperature-compensated references or selecting complementary devices in series configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 56 V nominal, ±5 % tolerance - defines precise regulation point for feedback loops or reference rails |
| Test Current (IZT) | 2.2 mA - operating point where VZ and dynamic resistance are specified; sets minimum bias requirement |
| Dynamic Resistance (ZZ) | 43 Ω at IZT - determines output impedance and load regulation sensitivity in shunt regulator designs |
| Reverse Leakage (IR) | < 0.1 μA at VR - ensures minimal error current in high-impedance reference nodes |
| Power Dissipation (Ptot) | 500 mW - maximum continuous DC power handling at Tamb = 25 °C with RthJA ≤ 300 K/W |
| Temperature Coefficient (TKVZ) | +0.096 %/K - quantifies VZ drift per degree Celsius; enables thermal error budgeting |
| Junction Temperature (Tj) | 175 °C max - defines upper thermal limit for reliability in sealed or high-ambient environments |
Pinout & Package
Package: QuadroMELF (SOD-80), glass-passivated cylindrical surface-mount package with cathode identified by a band. Approximate weight: 34 mg. MSL level 1, UL 94 V-0 molding compound, compatible with standard reflow profiles (260 °C/10 s at terminals).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection in shunt configuration | Connected to ground or lower-potential node; carries forward current during bias or transient conduction |
| Cathode | Zener breakdown terminal / regulated output node | Provides stable 56 V reference when reverse-biased; connected to input supply via current-limiting resistor |
Key Features
| Feature | Design Value |
|---|---|
| Very sharp reverse characteristic | Enables tight regulation bandwidth and fast response to line/load transients without overshoot |
| Low reverse leakage current | < 0.1 μA at VR minimizes error in high-impedance voltage divider or op-amp reference inputs |
| High stability over time and temperature | Specified under thermal equilibrium; supports long-term accuracy in uncalibrated systems |
| Low noise performance | Reduces RMS noise contribution in precision ADC references and sensor excitation circuits |
| Tighter VZ tolerance | ±5 % allows direct use in applications requiring no post-manufacturing trimming |
Applications
| Industrial Sensor Signal Conditioning | Programmable Logic Controller (PLC) Input Protection |
|---|---|
|
Use Scenario: Stabilizing reference voltage for 4–20 mA transmitter circuitry in pressure and temperature transducers. IC Role / Device Role / Timing Role: Zener diode providing 56 V rail for op-amp bias and current loop compliance. Use Value: Maintains loop accuracy within ±0.1 % full-scale error across -40 °C to +85 °C ambient due to predictable TKVZ and low IR. |
Use Scenario: Overvoltage clamping on digital input channels exposed to field wiring surges. IC Role / Device Role / Timing Role: Shunt protection element limiting input voltage to safe levels for microcontroller GPIOs. Use Value: Absorbs transient energy up to 500 mW without degradation, preserving system uptime in factory automation environments. |
| Medical Instrumentation Power Monitoring | Test & Measurement Equipment Calibration Reference |
|
Use Scenario: Monitoring auxiliary supply rails in portable ECG and pulse oximeter units. IC Role / Device Role / Timing Role: Precision voltage reference for ADC measurement of battery and DC-DC converter outputs. Use Value: Delivers sub-10 ppm/°C effective drift when combined with passive compensation, meeting IEC 60601-1 stability requirements. |
Use Scenario: Fixed reference node in benchtop multimeters and calibration sources requiring traceable voltage standards. IC Role / Device Role / Timing Role: Primary shunt reference establishing 56 V calibration point for range extension. Use Value: Enables 0.05 % absolute accuracy without active temperature control, reducing BOM cost and board space. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX55C56 (ON Semiconductor) | Same 56 V nominal, ±5 %, but TO-92 through-hole package; higher ZZ (70 Ω) and lower Ptot (500 mW same, but derated faster) | Requires PCB through-hole footprint; less suitable for automated SMT lines or space-constrained layouts | Select when legacy through-hole assembly or manual prototyping is required; verify thermal pad layout for equivalent power handling |
| MMBZ5256B (Diodes Inc.) | SOT-23 package; same VZ and tolerance, but higher IR (≤ 0.5 μA) and lower Ptot (350 mW); TKVZ not specified | Limited to lower-power biasing; unsuitable for sustained 500 mW dissipation or high-stability reference roles | Choose only for compact, low-current applications where size outweighs long-term stability and thermal margin |
Compared with BZX55C56 and MMBZ5256B, the TZQ5263B-GS18 offers superior thermal performance (MSL 1, QuadroMELF robustness), tighter IR control, and a documented +0.096 %/K TKVZ - making it preferred for industrial-grade voltage references demanding repeatability and solder-reflow compatibility.
Availability
TZQ5263B-GS18 is available at Aetrix Electronics and suitable for industrial sensor conditioning, PLC input protection, medical power monitoring, and test equipment calibration requiring stable component supply and consistent parametric performance across production lots.
Supply support for TZQ5263B-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 Intertechnology is a global semiconductor manufacturer specializing in discrete components, sensors, and passive elements, with emphasis on reliability, precision, and high-volume manufacturability.
The TZQ5263B-GS18 belongs to Vishay's TZQ52xxB series of small-signal Zener diodes, engineered for stable voltage reference and regulation in industrial, medical, and test instrumentation applications where low noise, sharp knee, and long-term stability are critical.
FAQ
What is the nominal zener voltage and tolerance of TZQ5263B-GS18?
The TZQ5263B-GS18 has a nominal zener voltage of 56 V with a tolerance of ±5 %, measured at 2.2 mA test current under thermal equilibrium conditions. This specification ensures predictable regulation behavior in shunt reference designs and allows direct integration into circuits requiring tight voltage setpoints without trimming.
What package type does TZQ5263B-GS18 use, and what are its key mechanical features?
TZQ5263B-GS18 uses the QuadroMELF (SOD-80) package - a glass-passivated cylindrical surface-mount device with cathode identification band. It weighs approximately 34 mg, complies with UL 94 V-0 flammability rating, and is rated MSL level 1, supporting standard reflow soldering at 260 °C for 10 seconds at terminals.
How does the temperature coefficient of TZQ5263B-GS18 affect its performance in precision applications?
The TZQ5263B-GS18 has a temperature coefficient of +0.096 %/K, meaning its zener voltage increases by ~0.054 V per 10 °C rise in junction temperature. This predictable positive drift must be accounted for in thermal error budgets - especially in unheated enclosures or wide-temperature-range deployments - but also enables compensation when paired with negative-coefficient devices.
What is the maximum reverse leakage current for TZQ5263B-GS18, and at what condition is it specified?
TZQ5263B-GS18 specifies reverse leakage current of < 0.1 μA at VR (rated zener voltage), measured at Tamb = 25 °C. This ultra-low leakage ensures minimal loading on high-impedance reference nodes, preserving accuracy in op-amp-based regulators and precision ADC front-ends where even nanoamp-level currents induce measurable errors.
Can TZQ5263B-GS18 be used in place of older Zener diodes like the 1N5256B?
TZQ5263B-GS18 is not a direct drop-in replacement for 1N5256B due to differing packages (QuadroMELF vs. DO-35) and test current (2.2 mA vs. 20 mA). While both target 56 V regulation, TZQ5263B-GS18 offers lower dynamic resistance (43 Ω vs. ~100 Ω), tighter leakage (< 0.1 μA vs. < 5 μA), and modern SMT compatibility - requiring layout and bias network review before substitution.
TZQ5263B-GS18 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- SOD-80 Variant
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 56 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 150 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 QuadroMELF
TZQ5263B-GS18 FAQ
1.How can I place an order for TZQ5263B-GS18 through Aetrix?
Please submit a Request for Quotation (RFQ) for TZQ5263B-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 TZQ5263B-GS18 reliable?
The price and inventory of TZQ5263B-GS18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TZQ5263B-GS18 is usually 5 days.
3.What payment methods are accepted for TZQ5263B-GS18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TZQ5263B-GS18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TZQ5263B-GS18?
TZQ5263B-GS18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TZQ5263B-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 TZQ5263B-GS18?
For technical support, including TZQ5263B-GS18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TZQ5263B-GS18 requirements.
6.How does Aetrix verify that TZQ5263B-GS18 is sourced from the original manufacturer or authorized distributors?
All TZQ5263B-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 TZQ5263B-GS18 meets industry standards.
7.What is the process for return or replacement of TZQ5263B-GS18?
All TZQ5263B-GS18 units undergo pre-shipment inspection (PSI). If there is an issue with TZQ5263B-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 TZQ5263B-GS18 part is unused and in its original packaging.
Return procedure for TZQ5263B-GS18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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