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Vishay General Semiconductor - Diodes Division BZT03C51-TR
- Part No.:
- BZT03C51-TR
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- SOD-57, Axial
- Datasheet:
-
BZT03C51-TR.pdf
- Description:
- DIODE ZENER 51V 1.3W SOD57
- Quantity:
- Payment:
- Shipping:
Inventory:6,053
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Product details
Overview
BZT03C51-TR from Vishay Semiconductors is a 51 V, 10 mA zener diode in SOD-57 package, rated for 3.25 W steady-state power dissipation and 600 W non-repetitive surge power, used for medium-power voltage regulation and transient suppression in industrial power supplies and automotive ECUs.
For engineers reviewing the BZT03C51-TR datasheet, BZT03C51-TR pinout, BZT03C51-TR application, or BZT03C51-TR equivalent, key selection criteria include zener voltage tolerance (±6%), dynamic resistance (25 Ω), clamping voltage (70.8 V at 4.2 A), temperature coefficient (+0.07 %/K), and hermetically sealed SOD-57 packaging for high-reliability environments.
Technical Context
The BZT03C51-TR operates as a single-element, glass-passivated zener diode with precise 51 V nominal breakdown voltage at 10 mA test current. Its clamping time is specified in picoseconds, enabling fast transient response in overvoltage protection circuits.
It features a low thermal resistance of 46 K/W (with 10 mm lead length) and supports junction temperatures up to 175 °C. The device meets UL 94 V-0 flammability rating and is rated MSL level 1 per J-STD-020, requiring no moisture preconditioning before soldering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 48–54 V range, nominal 51 V at 10 mA - ensures stable reference or clamp point across manufacturing variance |
| Power Dissipation (Ptot) | 3250 mW at TL = 25 °C with 10 mm lead length - enables robust thermal handling in PCB-mounted medium-power designs |
| Dynamic Resistance (ZZ) | 25 Ω max at IZT = 10 mA - maintains tight regulation under load variation |
| Clamping Voltage (VCL) | 70.8 V at IRMS = 4.2 A - defines maximum transient voltage seen by protected circuitry |
| Temperature Coefficient (TCVZ) | +0.07 %/K - minimizes drift over industrial temperature range (−65 to +175 °C) |
| Surge Power (PZSM) | 600 W for tp = 100 μs - withstands high-energy ESD and lightning-induced transients |
Pinout & Package
SOD-57 hermetically sealed axial-leaded package with glass passivated junction; weight 369 mg, UL 94 V-0 molding compound, MSL level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Forward conduction terminal / cathode reference ground path | Connected to lower-potential node; reverse-biased operation requires cathode at higher potential |
| Cathode (K) | Zener breakdown terminal / voltage reference output | Provides stable 51 V reference when reverse biased; clamps transients to ≤70.8 V |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enhances long-term stability and reduces leakage drift under thermal cycling |
| Hermetically sealed SOD-57 package | Prevents moisture ingress and corrosion in harsh industrial or automotive under-hood environments |
| Clamping time in picoseconds | Enables effective suppression of fast-rising ESD events (IEC 61000-4-2 Level 4) without signal distortion |
| Non-repetitive surge power: 600 W | Supports single-event transient immunity up to 100 μs pulses without degradation |
Applications
| Industrial Power Supply Regulation | Automotive ECU Transient Protection |
|---|---|
Use Scenario: Stabilizing 51 V auxiliary rail in programmable logic controller (PLC) power modules subject to line surges and load dump. IC Role / Device Role / Timing Role: Zener reference and overvoltage clamp for linear regulator feedback loop and downstream IC protection. Use Value: Maintains ±6% regulation tolerance while absorbing 600 W surge energy, preventing brownout or latch-up in 24 V system derivatives. | Use Scenario: Protecting CAN transceiver supply pins against ISO 7637-2 pulse 1 and pulse 2a transients in engine control units. IC Role / Device Role / Timing Role: Standoff clamping element placed between VCC and ground, activated only during overvoltage events. Use Value: Limits transient peak to 70.8 V within picosecond response, preserving transceiver integrity without affecting normal 12 V operation. |
| Telecom DC-DC Converter Reference | Renewable Energy Charge Controller |
Use Scenario: Providing precision 51 V reference for isolated flyback feedback in telecom 48 V input converters. IC Role / Device Role / Timing Role: Voltage reference source for optocoupler-based feedback network in primary-side regulation. Use Value: Low 25 Ω dynamic resistance ensures minimal load regulation error (<0.5%) across 1–10 mA bias current range. | Use Scenario: Clamping battery-side overvoltage in solar charge controllers during MPPT voltage spikes or open-circuit faults. IC Role / Device Role / Timing Role: Secondary-stage transient suppressor on 48 V battery bus, coordinated with upstream TVS array. Use Value: Withstands 600 W surge without derating at 175 °C junction temperature, supporting extended outdoor deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5355BRLG | 51 V nominal, 5 W Ptot, DO-201AD package, 40 Ω ZZ, +0.075 %/K TCVZ | Higher power rating but larger footprint and higher dynamic resistance | Preferred where board space allows and >3.25 W continuous dissipation is required |
| BZX85C51 | 51 V nominal, 1.3 W Ptot, DO-41 package, 70 Ω ZZ, +0.08 %/K TCVZ | Lower surge capability (100 W), smaller package, higher ZZ | Selected for cost-sensitive, low-energy applications with limited transient severity |
Compared with 1N5355BRLG and BZX85C51, the BZT03C51-TR delivers superior thermal performance (46 K/W vs. ~65 K/W), tighter dynamic resistance (25 Ω vs. ≥40 Ω), and hermetic sealing-making it optimal for high-reliability, medium-power transient suppression where SOD-57 mounting is acceptable.
Availability
BZT03C51-TR is available at Aetrix Electronics and suitable for industrial power supplies, automotive electronic control units, and renewable energy charge controllers requiring stable component supply and traceable sourcing.
Supply support for BZT03C51-TR 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 ruggedized packaging.
The BZT03-Series is designed for medium-power voltage regulation and transient suppression in harsh-environment applications including automotive, industrial automation, and telecom infrastructure.
FAQ
What is the zener voltage tolerance of the BZT03C51-TR?
The BZT03C51-TR has a zener voltage range of 48 V to 54 V at 10 mA test current, corresponding to a ±6% tolerance around the nominal 51 V value. This tolerance is guaranteed per the Vishay BZT03-Series datasheet Rev. 1.8 and applies under standard test conditions (Tamb = 25 °C). The BZT03C51-TR achieves this specification using glass passivation and hermetic sealing to minimize parametric drift over time and temperature.
Does the BZT03C51-TR support high-temperature operation?
Yes, the BZT03C51-TR is rated for junction temperatures up to 175 °C and storage temperatures from −65 °C to +175 °C. Its SOD-57 package and glass-passivated junction enable reliable operation in under-hood automotive and industrial environments. The BZT03C51-TR maintains specified electrical characteristics across this full range, with a temperature coefficient of +0.07 %/K ensuring predictable voltage drift.
What is the clamping voltage of the BZT03C51-TR under surge conditions?
The clamping voltage of the BZT03C51-TR is 70.8 V at an RMS surge current of 4.2 A, measured with a 10/1000 µs exponential falling pulse. This value defines the maximum voltage imposed on protected circuitry during transient events. The BZT03C51-TR achieves this performance due to its low dynamic resistance (25 Ω) and picosecond clamping time, making it suitable for IEC 61000-4-2 and ISO 7637-2 compliance testing.
Is the BZT03C51-TR RoHS-compliant and halogen-free?
Yes, the BZT03C51-TR complies with RoHS Directive 2011/65/EU and is halogen-free per Vishay's material categorization standard (document 99912). The SOD-57 package uses UL 94 V-0 compliant molding compound, and all materials meet Vishay's green initiative requirements. Full compliance documentation for the BZT03C51-TR is available upon request from Aetrix Electronics or directly via Vishay's website.
What is the surge power rating of the BZT03C51-TR and how is it tested?
The BZT03C51-TR is rated for 600 W non-repetitive peak surge power at tp = 100 μs and Tj = 25 °C. This rating is verified per the absolute maximum ratings table in the Vishay BZT03-Series datasheet. The test uses a single short-duration pulse to simulate lightning-induced or inductive-switching transients. The BZT03C51-TR must not suffer parametric shift or physical damage after such stress, confirming its suitability for high-energy protection roles.
BZT03C51-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- BZT03
- Package/Case:
- SOD-57, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 51 V
- Tolerance:
- ±5.88%
- Power - Max:
- 1.3 W
- Impedance (Max) (Zzt):
- 60 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 39 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 500 mA
- Operating Temperature:
- 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- SOD-57
BZT03C51-TR FAQ
1.How can I place an order for BZT03C51-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT03C51-TR 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 BZT03C51-TR reliable?
The price and inventory of BZT03C51-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT03C51-TR is usually 5 days.
3.What payment methods are accepted for BZT03C51-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT03C51-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT03C51-TR?
BZT03C51-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT03C51-TR 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 BZT03C51-TR?
For technical support, including BZT03C51-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT03C51-TR requirements.
6.How does Aetrix verify that BZT03C51-TR is sourced from the original manufacturer or authorized distributors?
All BZT03C51-TR 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 BZT03C51-TR meets industry standards.
7.What is the process for return or replacement of BZT03C51-TR?
All BZT03C51-TR units undergo pre-shipment inspection (PSI). If there is an issue with BZT03C51-TR, 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 BZT03C51-TR part is unused and in its original packaging.
Return procedure for BZT03C51-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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