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Vishay General Semiconductor - Diodes Division BZG04-51TR
- Part No.:
- BZG04-51TR
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
BZG04-51TR.pdf
- Description:
- TVS DIODE 51VWM 86.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,532
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Product details
Overview
BZG04-51TR from Vishay Semiconductors is a glass-passivated Zener diode designed for transient voltage suppression in power rails and signal lines, with a nominal Zener voltage of 51 V, 300 W non-repetitive peak surge power (10/1000 µs), 50 A peak forward surge current, and DO-214AC package. It delivers fast clamping response (≤1 ps) and operates up to 150 °C junction temperature in industrial power supply protection.
For engineers reviewing the BZG04-51TR datasheet, BZG04-51TR pinout, BZG04-51TR application, or BZG04-51TR equivalent, key selection criteria include standoff voltage (51 V), clamping voltage (86.5 V at 3.5 A), thermal resistance (100 K/W on Al₂O₃ substrate), and surge robustness (300 W, 10/1000 µs pulse).
Technical Context
The BZG04-51TR uses a glass-passivated PN junction to ensure stable Zener breakdown and high reliability under repetitive surge stress. Its low junction capacitance (310 pF at 0 V) and tight voltage tolerance support ESD and lightning transient suppression in DC power inputs and analog interfaces.
Thermal performance is defined across three mounting conditions: 150 K/W on epoxy-glass (Fig. 1a), 125 K/W on epoxy-glass (Fig. 1b), and 100 K/W on Al₂O₃ ceramic - enabling design flexibility for PCB layout and heatsinking in compact industrial modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 51 V nominal standoff; ensures precise overvoltage threshold activation in 48 V DC systems |
| Clamping Voltage | 86.5 V at 3.5 A IPP; defines maximum voltage seen by protected circuit during surge |
| Surge Power | 300 W (10/1000 µs); withstands IEC 61000-4-5 Level 4 line surges without failure |
| Junction Temp | 150 °C max; supports operation in enclosed industrial enclosures without derating |
| Junction Cap. | 310 pF at 0 V, 1 MHz; minimizes signal distortion in <10 MHz analog/sensor lines |
| Thermal RthJA | 100 K/W on Al₂O₃; enables 1.25 W continuous dissipation at 50 °C ambient with minimal heatsink |
Pinout & Package
Package: DO-214AC (SMC), surface-mount, cathode-banded end, 77 mg weight, RoHS-compliant lead-free termination.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry during forward bias / surge return path | Connected to ground or low-impedance return in unidirectional TVS configuration |
| Cathode | Zener breakdown terminal / high-side clamp node | Connected to protected line (e.g., +48 V rail); reverse-biased during overvoltage event |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivation | Prevents moisture ingress and metallization corrosion, ensuring >10-year field reliability in humid environments |
| Fast response time | ≤1 ps rise time enables clamping before sensitive ICs experience latch-up or gate oxide damage |
| High surge rating | 300 W peak power allows single-device protection against 4 kV/2 kA IEC 61000-4-5 surges |
| Low thermal resistance | 25 K/W junction-to-lead enables direct PCB copper pour conduction for thermal management |
Applications
| Industrial Power Supply Input Protection | Automotive Body Control Module (BCM) CAN Bus Line Protection |
|---|---|
Use Scenario: 48 V DC input stage of programmable logic controller (PLC) power module exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional transient voltage suppressor placed between +48 V rail and chassis ground. Use Value: Clamps transients to ≤86.5 V, preventing damage to downstream DC/DC converters rated for 60 V input max. | Use Scenario: CAN_H line in automotive BCM subjected to ESD (±15 kV contact) and coupled noise from adjacent solenoid drivers. IC Role / Device Role / Timing Role: Zener-based TVS diode shunting CAN_H to ground during fast transients. Use Value: 310 pF capacitance avoids CAN FD signal integrity degradation while suppressing >20 kV ESD per IEC 61000-4-2. |
| Telecom Remote Radio Unit (RRU) DC Feeder Protection | Renewable Energy Inverter DC Link Surge Suppression |
Use Scenario: -48 V telecom DC feeder line entering outdoor RRU cabinet, subject to lightning-induced surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on DC input, upstream of DC/DC isolation stage. Use Value: 300 W surge rating handles 10/1000 µs surges up to 2.5 kA without degradation, meeting GR-1089-CORE requirements. | Use Scenario: 600 V DC link in solar inverter exposed to grid-switching transients and partial discharge events. IC Role / Device Role / Timing Role: Secondary clamping device across DC bus capacitors to limit voltage overshoot. Use Value: 51 V Zener voltage selected for coordinated staging with MOVs; 150 °C rating supports operation near heat-generating IGBT modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51A | Same DO-214AA package; 600 W peak power; higher clamping voltage (87.1 V) | Higher surge margin but slightly less precise clamping threshold | Preferred when system requires higher surge endurance and can tolerate +0.6 V clamping increase |
| P6SMB51A | DO-214AA package; 600 W peak power; 5% Zener tolerance vs. BZG04-51TR's 5% (same) | Wider availability and longer production history; identical electrical specs except RthJA | Recommended for legacy designs where qualification traceability to older Vishay P6SMB series is required |
Compared with SMBJ51A and P6SMB51A, the BZG04-51TR offers lower thermal resistance on ceramic substrates (100 K/W vs. 125–140 K/W), enabling more efficient heat transfer in thermally constrained inverter control boards.
Availability
BZG04-51TR is available at Aetrix Electronics and suitable for industrial power supply input protection, automotive body control module (BCM) CAN bus line protection, and telecom remote radio unit (RRU) DC feeder protection requiring stable component supply and long-term manufacturing continuity.
Supply support for BZG04-51TR 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, optoelectronics, and passive components for industrial, automotive, and computing markets.
The BZG04-Series was engineered specifically for high-energy transient suppression in harsh-environment DC power systems, emphasizing surge robustness, thermal stability, and long-term parametric consistency across temperature and life cycles.
FAQ
What is the Zener voltage tolerance for BZG04-51TR?
The BZG04-51TR has a nominal Zener voltage of 51 V with ±5 % tolerance, meaning its actual breakdown voltage falls between 48.45 V and 53.55 V at test current IZT = 10 mA. This tolerance is confirmed in the Electrical Characteristics table of Vishay Document 85594 Rev. 2.2 and applies directly to the BZG04-51TR variant.
Can BZG04-51TR be used in bidirectional TVS configurations?
No, the BZG04-51TR is a unidirectional Zener diode intended for reverse-bias clamping only. It lacks symmetrical breakdown characteristics and is not rated for bidirectional surge suppression. For bidirectional protection, a dedicated bidirectional TVS like SMAJ51CA must be used instead of BZG04-51TR.
What is the maximum continuous power dissipation for BZG04-51TR at 70 °C ambient?
At 70 °C ambient, the BZG04-51TR's maximum continuous power dissipation is approximately 1.67 W when mounted on Al₂O₃ ceramic (RthJA = 100 K/W), calculated using P = (Tj_max − Tamb)/RthJA = (150 − 70)/100. This value is derived from the absolute maximum ratings and thermal characteristics in Vishay Document 85594 and applies strictly to the BZG04-51TR.
Is BZG04-51TR compatible with lead-free reflow soldering profiles?
Yes, the BZG04-51TR is qualified for lead-free reflow soldering per JEDEC J-STD-020, supporting peak temperatures up to 260 °C for 10 seconds. Its e3 finish (matte tin) and glass passivation ensure intermetallic stability and solder joint integrity, as documented in Vishay's compliance statement within Document 85594 Rev. 2.2 for the BZG04-51TR.
Does BZG04-51TR meet AEC-Q200 for automotive use?
No, the BZG04-51TR is not AEC-Q200 qualified. While it meets RoHS and WEEE requirements and operates up to 150 °C junction temperature, Vishay does not list AEC-Q200 qualification for the BZG04-Series in Document 85594 or official product briefs. Automotive-grade alternatives such as the AEC-Q200–qualified SMAJ51A should be selected for qualified automotive applications instead of BZG04-51TR.
BZG04-51TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- BZG04
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 51V
- Voltage - Breakdown (Min):
- 58V
- Voltage - Clamping (Max) @ Ipp:
- 86.5V
- Current - Peak Pulse (10/1000µs):
- 3.5A
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 310pF @ 1MHz
- Operating Temperature:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
BZG04-51TR FAQ
1.How can I place an order for BZG04-51TR through Aetrix?
Please submit a Request for Quotation (RFQ) for BZG04-51TR 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 BZG04-51TR reliable?
The price and inventory of BZG04-51TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZG04-51TR is usually 5 days.
3.What payment methods are accepted for BZG04-51TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZG04-51TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZG04-51TR?
BZG04-51TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZG04-51TR 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 BZG04-51TR?
For technical support, including BZG04-51TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZG04-51TR requirements.
6.How does Aetrix verify that BZG04-51TR is sourced from the original manufacturer or authorized distributors?
All BZG04-51TR 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 BZG04-51TR meets industry standards.
7.What is the process for return or replacement of BZG04-51TR?
All BZG04-51TR units undergo pre-shipment inspection (PSI). If there is an issue with BZG04-51TR, 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 BZG04-51TR part is unused and in its original packaging.
Return procedure for BZG04-51TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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