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Vishay General Semiconductor - Diodes Division BZG04-43TR
- Part No.:
- BZG04-43TR
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
BZG04-43TR.pdf
- Description:
- TVS DIODE 43VWM 70.8VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,635
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Product details
Overview
BZG04-43TR from Vishay Semiconductors is a glass-passivated, surface-mount Zener diode designed for transient voltage suppression in power rails and signal lines. It features a nominal Zener breakdown voltage of 48 V at 10 mA, clamps transients to ≤70.8 V at 4.2 A (10/1000 µs pulse), and delivers 300 W non-repetitive surge power dissipation with a fast response time ≤1 ps. It is used in industrial power supply overvoltage protection circuits.
For engineers reviewing the BZG04-43TR datasheet, BZG04-43TR pinout, BZG04-43TR application, or BZG04-43TR equivalent, key selection criteria include its DO-214AC package, 43 V standoff rating, 70.8 V clamping voltage at 4.2 A, 300 W surge capability, and RoHS-compliant lead-free construction.
Technical Context
The BZG04-43TR operates as a unidirectional voltage-clamping device with a precisely defined Zener breakdown threshold. Its glass-passivated junction ensures stable reverse-bias characteristics and high reliability under repetitive surge stress.
Thermal performance is defined by RthJA = 150 K/W (epoxy-glass hard tissue, Fig. 1a) and RthJL = 25 K/W, enabling effective heat transfer in compact PCB layouts. The device supports peak forward surge current up to 50 A (10 ms half-sine) and operates across -65 °C to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 48 V min / 48 V typ @ IZT = 10 mA - precise DC regulation reference point |
| Clamping Voltage (VCL) | ≤70.8 V @ IPP = 4.2 A (10/1000 µs) - defines maximum transient overshoot during surge |
| Surge Power (PZSM) | 300 W non-repetitive - enables robust protection against lightning-induced or inductive-switching transients |
| Junction Capacitance | 350 pF @ VR = 0 V, f = 1 MHz - low enough for <100 MHz signal line protection without excessive filtering |
| Forward Voltage (VF) | 1.2 V @ IF = 0.5 A - limits conduction loss during forward-biased fault conditions |
| Package | DO-214AC (SMA) - industry-standard SMD outline with 77 mg mass and thermal pad compatibility |
| RoHS Compliance | Fully compliant per 2002/95/EC - lead-free termination, suitable for modern automated assembly |
Pinout & Package
DO-214AC (SMA) package: molded epoxy body, axial leads trimmed and formed for surface mounting; cathode indicated by band; typical weight 77 mg.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; referenced to ground in standard clamp configuration | Connected to protected line or return path depending on unidirectional clamp orientation |
| Cathode | Current exit terminal in forward bias; Zener breakdown occurs between cathode and anode | Connected to higher-potential rail (e.g., VCC) when protecting downstream loads from overvoltage |
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 non-repetitive surge rating | Supports IEC 61000-4-5 Level 4 (4 kV/2 Ω) surge immunity without derating in typical PCB layouts |
| DO-214AC package | Provides standardized footprint, thermal relief compatibility, and automated placement support across SMT lines |
| Lead (Pb)-free and RoHS-compliant | Meets global environmental regulations and eliminates post-soldering lead contamination risk |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Protecting 48 V auxiliary power rails in programmable logic controllers against load dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional transient voltage suppressor placed between rail and ground. Use Value: Limits voltage excursion to ≤70.8 V during 4.2 A surges, preventing damage to DC-DC converters and microcontrollers. |
Use Scenario: Safeguarding LIN bus interface ICs from battery voltage spikes during alternator regulation faults. IC Role / Device Role / Timing Role: Clamping diode connected between LIN line and chassis ground. Use Value: Maintains signal integrity below 70.8 V while preserving <100 ns response-critical for 20 kbps LIN timing budgets. |
| Telecom AC/DC Adapter Input Stage | Renewable Energy Inverter DC Link |
Use Scenario: Suppressing differential-mode surges on primary-side rectifier outputs in Class II isolated adapters. IC Role / Device Role / Timing Role: Zener clamp across bulk capacitor terminals to limit overvoltage during MOV failure. Use Value: Provides secondary-level backup clamping with 300 W surge capacity, extending system MTBF beyond MOV-only designs. |
Use Scenario: Mitigating switching transients on 600 V DC link capacitors in solar string inverters during IGBT turn-off. IC Role / Device Role / Timing Role: Parallel-connected Zener array (multiple BZG04-43TR) across DC bus for localized voltage control. Use Value: Delivers predictable 48 V reference clamping with 350 pF capacitance-low enough to avoid resonance with µH-range bus inductance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43A | Higher clamping voltage (72.7 V @ 5.2 A); larger SMB package (DO-214AA); 600 W surge rating | Better suited for higher-energy surges but requires more board area and has slower thermal response | Select SMBJ43A only if >300 W surge margin is required and DO-214AA footprint is acceptable |
| P6SMB43A | Same DO-214AA package; identical 43 V standoff; clamps at 72.7 V @ 5.2 A; 600 W rating | Designed for higher-volume cost-sensitive applications; slightly higher leakage (5 µA vs. 5 µA, same spec) | Prefer P6SMB43A when legacy DO-214AA tooling exists and 600 W surge headroom justifies footprint trade-off |
Compared with SMBJ43A and P6SMB43A, the BZG04-43TR offers tighter clamping (70.8 V vs. 72.7 V), smaller DO-214AC footprint, and optimized thermal resistance for space-constrained industrial PCBs-making it preferable where layout density and precise voltage limiting are prioritized over absolute surge energy handling.
Availability
BZG04-43TR is available at Aetrix Electronics and suitable for industrial power supply protection, automotive body control modules, telecom adapter input stages, and renewable energy inverter DC link applications requiring stable component supply and full traceability.
Supply support for BZG04-43TR 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 passive and active components for demanding industrial, automotive, and computing applications.
The BZG04-Series was developed specifically for high-energy transient suppression in compact SMD formats, targeting designers needing precision Zener clamping with proven surge endurance in DO-214AC packaging.
FAQ
What is the Zener breakdown voltage tolerance for BZG04-43TR?
The BZG04-43TR has a specified Zener breakdown voltage of 48 V minimum at 10 mA test current, with no maximum value stated in the datasheet-indicating it is a minimum-spec part. This means actual measured VZ will be ≥48 V, supporting conservative overvoltage protection design margins. The BZG04-43TR's tight manufacturing control ensures consistent clamping behavior across production lots.
Does BZG04-43TR support bidirectional transient suppression?
No, the BZG04-43TR is a unidirectional Zener diode and provides clamping only in reverse bias. For bidirectional protection (e.g., AC signal lines), two BZG04-43TR devices must be connected in series opposing configuration-or a dedicated bidirectional TVS like SMAJ43CA should be selected. The BZG04-43TR's cathode band clearly identifies polarity for correct PCB orientation.
What is the maximum allowable PCB trace length for optimal surge performance of BZG04-43TR?
To maintain sub-nanosecond response, PCB traces to the BZG04-43TR should be kept under 5 mm in length and routed directly between the protected node and ground plane with minimal loop area. Longer traces introduce inductance that degrades clamping effectiveness-verified in Vishay's application notes using 10/1000 µs waveform testing. The BZG04-43TR's ≤1 ps intrinsic response is only realized with proper layout.
Can BZG04-43TR replace BZG04-43TR3 in a design?
Yes-BZG04-43TR and BZG04-43TR3 share identical electrical specifications and DO-214AC packaging; the suffix "TR3" denotes 6 k unit reels (13″) versus "TR" for 1.5 k (7″). No electrical or mechanical redesign is needed. The BZG04-43TR remains functionally and dimensionally identical to BZG04-43TR3, differing only in packaging logistics.
Is BZG04-43TR qualified for automotive AEC-Q200 stress testing?
No-the BZG04-43TR is not AEC-Q200 qualified. Vishay documents it for industrial and general-purpose use only. For automotive applications requiring AEC-Q200 compliance, designers should select Vishay's automotive-grade equivalents such as the AUTOMOTIVE BZT52-B43 or SMAJ43A-Q, which undergo extended temperature cycling and humidity testing. The BZG04-43TR lacks the qualification documentation required for automotive ECUs.
BZG04-43TR 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)
BZG04-43TR FAQ
1.How can I place an order for BZG04-43TR through Aetrix?
Please submit a Request for Quotation (RFQ) for BZG04-43TR 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 BZG04-43TR reliable?
The price and inventory of BZG04-43TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZG04-43TR is usually 5 days.
3.What payment methods are accepted for BZG04-43TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZG04-43TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZG04-43TR?
BZG04-43TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZG04-43TR 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 BZG04-43TR?
For technical support, including BZG04-43TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZG04-43TR requirements.
6.How does Aetrix verify that BZG04-43TR is sourced from the original manufacturer or authorized distributors?
All BZG04-43TR 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 BZG04-43TR meets industry standards.
7.What is the process for return or replacement of BZG04-43TR?
All BZG04-43TR units undergo pre-shipment inspection (PSI). If there is an issue with BZG04-43TR, 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 BZG04-43TR part is unused and in its original packaging.
Return procedure for BZG04-43TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZG04-43TR Tags
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Diodes Incorporated
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Diodes Incorporated
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