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Vishay General Semiconductor - Diodes Division BZG04-43TR3
- Part No.:
- BZG04-43TR3
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
BZG04-43TR3.pdf
- Description:
- TVS DIODE 43VWM 70.8VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,593
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Product details
Overview
BZG04-43TR3 from Vishay Semiconductors is a glass-passivated Zener diode designed for transient voltage suppression in power rails and signal lines, with a nominal Zener breakdown voltage of 48 V at 10 mA, clamping voltage of 70.8 V at 4.2 A (10/1000 µs pulse), and surge power rating of 300 W. It operates within -65 °C to +150 °C and is packaged in DO-214AC for industrial-grade surge protection in DC power supplies and automotive electronics.
For engineers reviewing the BZG04-43TR3 datasheet, BZG04-43TR3 pinout, BZG04-43TR3 application, or BZG04-43TR3 equivalent, key selection criteria include its 48 V Zener voltage tolerance, 70.8 V clamping performance under 4.2 A surge, 300 W non-repetitive peak surge power, DO-214AC package thermal resistance (100 K/W on Al₂O₃), and RoHS-compliant lead-free construction.
Technical Context
The BZG04-43TR3 functions as a unidirectional voltage-clamping device with fast response time (≤1 ps), optimized for high-energy transient suppression in DC circuits. Its glass-passivated junction ensures stable Zener characteristics and high reliability under repeated surge stress.
Thermal design relies on mounting configuration: RthJA is 100 K/W when mounted on Al₂O₃ ceramic, 125 K/W on epoxy-glass hard tissue (Fig. 1b), and 150 K/W on same substrate per Fig. 1a - directly impacting sustained power handling in real-world PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 48 V min / 52 V max at IZT = 10 mA - defines precise clamping threshold for overvoltage protection |
| Clamping Voltage (VCL) | 70.8 V max at IPP = 4.2 A (10/1000 µs) - determines maximum voltage seen by protected circuit during surge |
| Surge Power (PZSM) | 300 W non-repetitive - enables single-event suppression of high-energy transients without failure |
| Junction-to-Lead Thermal Resistance | 25 K/W - supports efficient heat transfer to PCB copper or heatsink via cathode/anode leads |
| Capacitance (Cj) | 350 pF max at VR = 0 V, f = 1 MHz - limits high-frequency signal distortion in data line protection |
| Standoff Voltage (VR) | 43 V max - ensures no conduction below system operating voltage, minimizing leakage in standby |
| Forward Voltage (VF) | 1.2 V max at IF = 0.5 A - defines forward conduction loss if used in bidirectional configurations with series diode |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, plastic case with cathode band marking; weight ≈ 77 mg; compatible with standard reflow profiles per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward bias; connected to lower-potential node in clamp configuration | Must be routed to ground or low-impedance return path to enable effective clamping to reference |
| Cathode | Current exit point during reverse breakdown; connected to protected line or supply rail | Primary surge current path - requires low-inductance trace to minimize V = L·di/dt overshoot |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures long-term stability of Zener voltage and leakage current under thermal cycling and humidity stress |
| Fast response time ≤ 1 ps | Enables clamping before transient energy couples into sensitive downstream circuitry |
| 300 W peak surge power (10/1000 µs) | Supports IEC 61000-4-5 Level 4 (4 kV) surge immunity without derating in properly laid-out designs |
| RoHS-compliant, lead-free | Meets EU Directive 2002/95/EC and WEEE 2002/96/EC - suitable for export-controlled and consumer electronics |
| DO-214AC package | Standardized footprint allows drop-in replacement with SMA-compatible TVS diodes and simplifies PCB library management |
Applications
| DC Power Supply Protection | Automotive Body Control Module |
|---|---|
Use Scenario: 48 V battery-fed control unit exposed to load-dump transients up to 60 V. IC Role / Device Role / Timing Role: Primary clamping element across input rail to limit voltage excursion during ISO 7637-2 Pulse 5a events. Use Value: Clamps to 70.8 V at 4.2 A, preventing damage to 75 V-rated DC-DC converters and microcontrollers. |
Use Scenario: LIN bus interface circuit subjected to ESD and coupled noise from adjacent solenoid drivers. IC Role / Device Role / Timing Role: Secondary protection device placed after series impedance to absorb residual energy not filtered upstream. Use Value: 350 pF capacitance avoids signal integrity degradation on 20 kbps LIN lines while providing 300 W surge margin. |
| Industrial PLC Input Module | Telecom Power Shelf |
Use Scenario: 24–48 V digital input channel receiving signals from field sensors in factory environments. IC Role / Device Role / Timing Role: Standoff protector maintaining high-impedance state until >43 V, then clamping to protect optocoupler input stage. Use Value: 43 V standoff prevents false triggering during normal operation; 48 V Zener ensures predictable turn-on under fault. |
Use Scenario: -48 V telecom rectifier output rail subject to lightning-induced surges on distribution cables. IC Role / Device Role / Timing Role: Bulk transient suppressor mounted at board edge, shunting surge current to chassis ground. Use Value: 100 K/W RthJA on Al₂O₃ enables sustained 1.25 W dissipation at 50 °C ambient - critical for multi-unit rack thermal stacking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener-based transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43A | Higher clamping voltage (72.7 V @ 5.2 A), higher surge rating (600 W), but larger SMB package (DO-214AA) | Requires PCB layout change due to 2.5 mm wider body and different pad geometry; better suited for higher-energy systems | Select SMBJ43A only when >300 W surge margin is required and board space permits larger footprint |
| P6SMB43A | Same DO-214AC package, identical 43 V standoff, but lower surge rating (600 W) and higher clamping (72.7 V); RoHS-compliant | Compatible footprint but higher VCL may exceed downstream IC tolerances in tight-margin designs | Prefer BZG04-43TR3 where 70.8 V clamping is critical; use P6SMB43A only if legacy stock or alternate sourcing is needed |
Compared with SMBJ43A and P6SMB43A, the BZG04-43TR3 delivers tighter clamping (70.8 V vs. ≥72.7 V) in the same DO-214AC footprint, enabling more robust protection for 75 V-rated components without layout revision - while maintaining 300 W surge capability sufficient for most industrial and automotive transients.
Availability
BZG04-43TR3 is available at Aetrix Electronics and suitable for DC power supply protection, automotive body control modules, and industrial PLC input modules requiring stable component supply with full traceability and lifecycle support.
Supply support for BZG04-43TR3 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 for industrial, automotive, and computing markets.
The BZG04-Series was engineered specifically for high-surge, high-reliability transient voltage suppression in harsh environments - emphasizing stable Zener voltage, low capacitance, and repeatable clamping performance across temperature and lifetime.
FAQ
What is the Zener breakdown voltage range for BZG04-43TR3?
The BZG04-43TR3 has a specified Zener breakdown voltage range of 48 V minimum to 52 V maximum at test current IZT = 10 mA. This range reflects manufacturing tolerance and ensures consistent clamping behavior across production lots. The 43 V value in the part number denotes the maximum standoff voltage (VR), not the Zener voltage - a key distinction for accurate circuit design using the BZG04-43TR3.
Does BZG04-43TR3 meet RoHS requirements?
Yes, the BZG04-43TR3 is RoHS-compliant per Directive 2002/95/EC and WEEE 2002/96/EC, and is manufactured as a lead-free component. Vishay confirms no ozone-depleting substances are used in its production, and the device carries the "e3" marking indicating lead-free termination. This makes the BZG04-43TR3 suitable for export-controlled and consumer electronics applications requiring full environmental compliance.
What is the maximum clamping voltage of BZG04-43TR3 under surge conditions?
The BZG04-43TR3 has a maximum clamping voltage (VCL) of 70.8 V when subjected to a 10/1000 µs surge pulse at peak current IPP = 4.2 A. This value is measured under standardized transient conditions and defines the upper voltage limit imposed on protected circuitry during surge events. Designers must ensure downstream components have voltage ratings exceeding this clamping level to guarantee robust protection using the BZG04-43TR3.
Can BZG04-43TR3 be used in bidirectional protection configurations?
The BZG04-43TR3 is a unidirectional Zener diode and is not inherently bidirectional. However, it can be used in bidirectional configurations when paired with a series diode or in back-to-back arrangement with another BZG04-43TR3. In such cases, forward voltage drop (1.2 V max at 0.5 A) and thermal coupling between devices must be accounted for. For native bidirectional protection, dedicated symmetric TVS devices are recommended instead of the BZG04-43TR3 alone.
What thermal resistance values apply to BZG04-43TR3 in PCB design?
The BZG04-43TR3 exhibits three defined thermal resistances depending on mounting: 100 K/W junction-to-ambient when mounted on Al₂O₃ ceramic (Fig. 1b), 125 K/W on epoxy-glass hard tissue (same figure), and 150 K/W on the same substrate per Fig. 1a. Junction-to-lead resistance is fixed at 25 K/W. These values directly impact power derating curves - for example, at 50 °C ambient, the BZG04-43TR3 supports 1.25 W continuous dissipation only when RthJA ≤ 100 K/W, which requires careful thermal pad design and substrate selection in the final layout.
BZG04-43TR3 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):
- 43V
- Voltage - Breakdown (Min):
- 48V
- Voltage - Clamping (Max) @ Ipp:
- 70.8V
- Current - Peak Pulse (10/1000µs):
- 4.2A
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 350pF @ 1MHz
- Operating Temperature:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
BZG04-43TR3 FAQ
1.How can I place an order for BZG04-43TR3 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZG04-43TR3 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 BZG04-43TR3 reliable?
The price and inventory of BZG04-43TR3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZG04-43TR3 is usually 5 days.
3.What payment methods are accepted for BZG04-43TR3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZG04-43TR3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZG04-43TR3?
BZG04-43TR3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZG04-43TR3 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 BZG04-43TR3?
For technical support, including BZG04-43TR3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZG04-43TR3 requirements.
6.How does Aetrix verify that BZG04-43TR3 is sourced from the original manufacturer or authorized distributors?
All BZG04-43TR3 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 BZG04-43TR3 meets industry standards.
7.What is the process for return or replacement of BZG04-43TR3?
All BZG04-43TR3 units undergo pre-shipment inspection (PSI). If there is an issue with BZG04-43TR3, 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 BZG04-43TR3 part is unused and in its original packaging.
Return procedure for BZG04-43TR3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZG04-43TR3 Tags
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