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Vishay General Semiconductor - Diodes Division BZG04-12TR3
- Part No.:
- BZG04-12TR3
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
BZG04-12TR3.pdf
- Description:
- TVS DIODE 12VWM 20.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,853
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Product details
Overview
BZG04-12TR3 from Vishay Semiconductors is a glass-passivated, lead-free Zener diode designed for high-energy transient voltage suppression in power supply and interface protection circuits. It features a 12 V nominal standoff voltage, 20.9 V clamping voltage at 14.4 A peak pulse current, 300 W non-repetitive surge power rating, and DO-214AC (SMA) package for surface-mount reliability in industrial power rails.
For engineers reviewing the BZG04-12TR3 datasheet, BZG04-12TR3 pinout, BZG04-12TR3 application, or BZG04-12TR3 equivalent, key selection criteria include its 12 V breakdown voltage tolerance (±5 %), low 815 pF junction capacitance at 0 V, fast ≤1 ps response time, and thermal resistance of 100 K/W when mounted on Al₂O₃ ceramic - critical for surge immunity validation in 24 V DC systems.
Technical Context
The BZG04-12TR3 operates as a unidirectional voltage-clamping device with precise Zener breakdown behavior under reverse bias. Its glass-passivated junction ensures stable leakage current (<5 µA at 12 V) and long-term parameter stability across temperature cycles.
Designed for transient suppression per IEC 61000-4-5, it delivers 300 W peak surge power handling (10/1000 µs waveform) and supports 50 A forward surge current (10 ms half-sine), enabling robust protection in automotive load-dump and industrial motor-drive gate driver circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage | 12 V - defines maximum continuous reverse operating voltage before conduction begins |
| Breakdown Voltage | 13.8 V min @ 50 mA - guarantees reliable clamping onset under standard test conditions |
| Clamping Voltage | 20.9 V max @ 14.4 A - limits transient voltage seen by downstream ICs during surge events |
| Junction Capacitance | 815 pF @ 0 V, 1 MHz - impacts high-frequency noise coupling and signal integrity in data lines |
| Surge Power Rating | 300 W (10/1000 µs) - enables single-event protection against lightning-induced surges in 24 V systems |
| Thermal Resistance | 100 K/W on Al₂O₃ ceramic - determines safe power derating and PCB copper area requirements |
| Package | DO-214AC (SMA) - industry-standard SMD footprint compatible with automated assembly and IPC-7351B land patterns |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, molded plastic case with glass-passivated chip; weight ≈77 mg; dimensions per Vishay Doc. 85594 Rev. 2.2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-bias anode connection point | Connected to protected line; conducts during overvoltage to clamp to VZ |
| Anode | Reference/ground return path | Must be tied to system ground or lowest potential node for effective clamping |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures <5 µA leakage at 12 V and stable VZ drift over 1000-hour life testing |
| Fast response time | ≤1 ps rise time enables suppression of ESD and fast-rising transients before IC damage occurs |
| Lead-free & RoHS-compliant | Meets EU Directive 2002/95/EC and WEEE 2002/96/EC without SnPb solder compatibility compromises |
| High surge current capability | 50 A peak forward surge rating supports repeated motor-switching and relay-coil flyback energy dissipation |
Applications
| Industrial PLC I/O Protection | Automotive Body Control Module |
|---|---|
Use Scenario: 24 V DC input channels exposed to inductive switching noise and load dump pulses in programmable logic controllers. IC Role / Device Role / Timing Role: Primary transient voltage suppressor placed directly at connector entry point before signal conditioning circuitry. Use Value: Clamps transients to ≤20.9 V while absorbing up to 300 W surge energy, preventing latch-up in isolated RS-485 transceivers and microcontroller GPIOs. | Use Scenario: Protection of LIN bus transceivers and sensor inputs against battery reversal and alternator load dump in vehicle body electronics. IC Role / Device Role / Timing Role: Unidirectional TVS diode connected between LIN line and chassis ground to shunt surge current away from PHY layer. Use Value: 815 pF capacitance avoids signal distortion on 20 kbps LIN waveforms; 12 V standoff matches nominal vehicle battery range. |
| DC Power Supply Rail Clamp | Motor Drive Gate Driver Protection |
Use Scenario: Secondary-side 12 V rail in industrial AC/DC converters subject to back-EMF and capacitor discharge spikes. IC Role / Device Role / Timing Role: Standby clamping element parallel to bulk output capacitor to limit overshoot during sudden load removal. Use Value: 3 W steady-state power rating allows continuous operation near thermal limit; 100 K/W RthJA on ceramic enables compact heatsinking. | Use Scenario: Protection of high-side N-channel MOSFET gate drivers against Miller-induced voltage spikes during fast switching. IC Role / Device Role / Timing Role: Zener clamp between gate and source to prevent VGS exceedance beyond ±20 V absolute maximum rating. Use Value: 20.9 V clamping voltage provides 1.1 V margin below typical 22 V gate oxide breakdown, ensuring long-term reliability. |
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 |
|---|---|---|---|
| SMBJ12A | Higher clamping voltage (21.2 V), same DO-214AA package, 600 W surge rating | Designed for bidirectional surge suppression; lacks tight VZ tolerance of BZG04-12TR3 | Select SMBJ12A only when bidirectional protection or higher surge margin is required; verify layout compatibility with SMA vs. SMB footprint |
| P6SMB12A | Same DO-214AA package, 600 W rating, but 21.2 V clamping and 1000 pF capacitance | Higher junction capacitance reduces suitability for >1 Mbps data lines; wider VZ tolerance (±10 %) | Prefer P6SMB12A for cost-sensitive general-purpose clamping where 815 pF and ±5 % VZ are not critical |
Compared with SMBJ12A and P6SMB12A, the BZG04-12TR3 offers tighter 12 V standoff tolerance (±5 %), lower 815 pF capacitance, and optimized thermal performance on ceramic substrates - making it preferred for precision 24 V rail clamping and high-speed interface protection where parameter consistency matters.
Availability
BZG04-12TR3 is available at Aetrix Electronics and suitable for industrial PLC I/O protection, automotive body control modules, and DC power supply rail clamping requiring stable component supply and traceable sourcing.
Supply support for BZG04-12TR3 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 industrial, automotive, and computing applications.
The BZG04-Series was engineered specifically for high-energy transient suppression in harsh environments, emphasizing glass passivation, surge robustness, and RoHS compliance without sacrificing electrical precision.
FAQ
What is the exact standoff voltage specification for BZG04-12TR3?
The BZG04-12TR3 has a nominal standoff voltage of 12 V, with a guaranteed minimum breakdown voltage of 13.8 V at 50 mA test current. This value is measured under standard conditions (Tamb = 25 °C) and reflects the voltage at which the diode enters controlled reverse conduction - critical for setting protection thresholds in 24 V systems where BZG04-12TR3 is commonly deployed.
Does BZG04-12TR3 meet RoHS and lead-free requirements?
Yes, BZG04-12TR3 is explicitly certified as lead-free and compliant with EU RoHS Directive 2002/95/EC and WEEE 2002/96/EC. Vishay confirms no ozone-depleting substances were used in its manufacture, and the device carries the "e3" marking indicating matte tin termination - fully compatible with lead-free reflow profiles and IPC-J-STD-020 moisture sensitivity level 1 handling.
What is the maximum clamping voltage of BZG04-12TR3 under surge conditions?
The BZG04-12TR3 exhibits a maximum clamping voltage of 20.9 V when subjected to a 10/1000 µs surge pulse at 14.4 A peak current. This value is specified in Vishay's Document Number 85594 Rev. 2.2 and represents the upper limit of voltage seen by protected circuitry during standardized surge events - essential for validating safe operating margins of downstream 24 V-rated ICs.
Can BZG04-12TR3 be used in bidirectional transient protection circuits?
No, BZG04-12TR3 is a unidirectional Zener diode intended for reverse-bias clamping only. It does not provide symmetrical protection for both polarities. For bidirectional applications such as AC line or USB ESD protection, a dedicated bidirectional TVS like SMBJ12CA must be selected instead - BZG04-12TR3 would require external series diode pairing to achieve bidirectional behavior, adding complexity and reducing speed.
What thermal resistance can be expected when mounting BZG04-12TR3 on FR-4 PCB?
When mounted on standard epoxy-glass (FR-4) PCB per Figure 1a in Vishay Doc. 85594, the BZG04-12TR3 exhibits a junction-to-ambient thermal resistance (RthJA) of 150 K/W. This value assumes minimal copper pour; increasing copper area or using thermal vias can reduce RthJA, but design validation per actual layout is required before final thermal margin assessment for BZG04-12TR3.
BZG04-12TR3 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):
- 12V
- Voltage - Breakdown (Min):
- 13.8V
- Voltage - Clamping (Max) @ Ipp:
- 20.9V
- Current - Peak Pulse (10/1000µs):
- 14.4A
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 815pF @ 1MHz
- Operating Temperature:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
BZG04-12TR3 FAQ
1.How can I place an order for BZG04-12TR3 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZG04-12TR3 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 BZG04-12TR3 reliable?
The price and inventory of BZG04-12TR3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZG04-12TR3 is usually 5 days.
3.What payment methods are accepted for BZG04-12TR3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZG04-12TR3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZG04-12TR3?
BZG04-12TR3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZG04-12TR3 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 BZG04-12TR3?
For technical support, including BZG04-12TR3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZG04-12TR3 requirements.
6.How does Aetrix verify that BZG04-12TR3 is sourced from the original manufacturer or authorized distributors?
All BZG04-12TR3 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 BZG04-12TR3 meets industry standards.
7.What is the process for return or replacement of BZG04-12TR3?
All BZG04-12TR3 units undergo pre-shipment inspection (PSI). If there is an issue with BZG04-12TR3, 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 BZG04-12TR3 part is unused and in its original packaging.
Return procedure for BZG04-12TR3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZG04-12TR3 Tags
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