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Vishay General Semiconductor - Diodes Division BZG04-20TR3
- Part No.:
- BZG04-20TR3
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
BZG04-20TR3.pdf
- Description:
- TVS DIODE 20VWM 33.8VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,051
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Product details
Overview
BZG04-20TR3 from Vishay Semiconductors is a glass-passivated Zener diode optimized for transient voltage suppression in high-energy surge environments, with a nominal Zener breakdown voltage of 22.8 V at 25 mA, clamping voltage of 33.8 V at 8.9 A (10/1000 µs pulse), and peak surge power dissipation of 300 W. It is used in DC power rail protection for industrial motor drives and telecom power supplies.
For engineers reviewing the BZG04-20TR3 datasheet, BZG04-20TR3 pinout, BZG04-20TR3 application, or BZG04-20TR3 equivalent, key selection criteria include standoff voltage tolerance, clamping ratio, junction-to-lead thermal resistance (25 K/W), and DO-214AC package compatibility with automated SMT assembly.
Technical Context
The BZG04-20TR3 operates as a unidirectional voltage-clamping device with fast response time (≤1 ps), leveraging a glass-passivated silicon junction to ensure stable Zener characteristics under repetitive surge stress. Its thermal design relies on low RthJL (25 K/W) for efficient heat transfer to PCB copper, enabling reliable operation up to 150 °C junction temperature.
It is rated for non-repetitive 10/1000 µs surge pulses up to 300 W and supports peak forward surge current of 50 A (10 ms half-sine). The device meets RoHS 2002/95/EC and WEEE 2002/96/EC requirements and is lead (Pb)-free.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 22.8 V min / 25.1 V max @ IZT = 25 mA - defines precise DC regulation threshold and overvoltage trip point |
| Clamping Voltage (VCL) | 33.8 V @ IPP = 8.9 A (10/1000 µs) - determines maximum voltage seen by protected IC during surge |
| Peak Surge Power | 300 W @ tp = 10/1000 µs - enables robust handling of lightning-induced transients per IEC 61000-4-5 |
| Junction-to-Lead Thermal Resistance | 25 K/W - allows direct thermal coupling to PCB copper pour for sustained power dissipation |
| Package | DO-214AC (SMA) - industry-standard surface-mount outline compatible with IPC-7351B footprint |
| Surge Current Rating | 50 A peak @ 10 ms half-sine - supports AC line surge immunity testing per IEC 61000-4-4 |
| Standoff Voltage (VR) | 20 V max - ensures no conduction below system operating voltage, minimizing leakage in standby |
Pinout & Package
Package: DO-214AC (SMA), molded plastic case with axial leads trimmed and formed for surface-mount use; weight ≈ 77 mg; RoHS-compliant matte tin plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Zener reference terminal | Connected to higher-potential node (e.g., VIN rail); reverse-biased during clamping |
| Anode | Reference return path | Connected to ground or lower-potential rail; completes clamping current path during transient |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable Zener voltage over lifetime and humidity exposure without hermetic sealing |
| Fast response time ≤1 ps | Clamps ESD and fast-rising transients before downstream ICs experience overstress |
| 300 W non-repetitive surge rating | Meets Level 4 IEC 61000-4-5 surge immunity without external series impedance |
| DO-214AC package | Supports automated pick-and-place and reflow soldering; compatible with standard SMA footprints |
| Lead-free and RoHS-compliant | Fulfills EU environmental compliance requirements without compromising surge performance |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
Use Scenario: Protection of gate drivers and bus voltage sense circuits against IGBT switching spikes and load dump transients. IC Role / Device Role / Timing Role: Unidirectional transient voltage suppressor placed across DC bus or gate resistor network. Use Value: Limits transient voltage to ≤33.8 V, preventing latch-up or oxide breakdown in 3.3 V/5 V control ICs. |
Use Scenario: Input-stage surge suppression on -48 V DC distribution rails in base station power modules. IC Role / Device Role / Timing Role: Primary clamping element parallel to bulk input capacitor, activated within picoseconds of surge onset. Use Value: Absorbs 300 W surges without degradation, maintaining <1 µA leakage at -48 V operating bias. |
| Automotive Body Control Modules | Programmable Logic Controllers |
Use Scenario: Load-dump protection on 12 V microcontroller supply inputs in vehicle door modules. IC Role / Device Role / Timing Role: Standoff-rated Zener clamp triggered by ISO 7637-2 Pulse 5a (12 V systems). Use Value: Clamps 12 V rail to 33.8 V during 100 V/100 ms load dump, preserving MCU reset integrity. |
Use Scenario: Field I/O port protection against induced surges on 24 V digital input cards. IC Role / Device Role / Timing Role: Front-end TVS element shunting surge energy before optocoupler input stage. Use Value: Withstands repeated 50 A surges while maintaining <0.06 %/K temperature coefficient for stable threshold. |
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 |
|---|---|---|---|
| SMBJ20A | Higher clamping voltage (32.4 V @ 11.6 A), lower surge rating (600 W but at 1 kW peak), bidirectional configuration | Designed for bidirectional AC line protection; requires polarity-aware layout for DC use | Select when bidirectional capability or higher peak power margin is required; verify polarity orientation in DC circuits |
| P6SMB20A | Same DO-214AA package (slightly larger than DO-214AC), 32.4 V clamping @ 11.6 A, 600 W surge rating | Larger thermal mass but lower power density; less suitable for space-constrained 2-layer PCBs | Prefer when legacy SMB footprint compatibility is mandatory and board area permits larger case size |
Compared with SMBJ20A and P6SMB20A, the BZG04-20TR3 offers tighter Zener tolerance (22.8–25.1 V vs. typical ±5 %), lower clamping ratio (1.48× VZ), and optimized DO-214AC footprint for high-density SMT layouts-making it preferred for precision DC rail clamping where leakage and thermal footprint are critical.
Availability
BZG04-20TR3 is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, and programmable logic controllers requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZG04-20TR3 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 power applications.
The BZG04-Series was developed specifically for high-energy transient suppression in DC power systems, emphasizing stable Zener voltage, low clamping overshoot, and robust surge endurance in compact surface-mount packages.
FAQ
What is the Zener breakdown voltage tolerance for BZG04-20TR3?
The BZG04-20TR3 has a specified Zener breakdown voltage range of 22.8 V minimum to 25.1 V maximum at test current IZT = 25 mA, corresponding to a ±5 % tolerance around the nominal 24 V rating. This tight tolerance ensures predictable clamping behavior across production lots and temperature ranges, critical for protecting sensitive 3.3 V or 5 V logic interfaces downstream of the BZG04-20TR3.
Can BZG04-20TR3 be used in bidirectional surge protection circuits?
No, the BZG04-20TR3 is a unidirectional Zener diode and conducts only in reverse bias; it does not provide clamping for positive-going transients on grounded lines. For bidirectional protection, a pair of BZG04-20TR3 devices in series opposition or a dedicated bidirectional TVS like SMBJ20CA would be required. Using a single BZG04-20TR3 in AC-coupled or floating applications risks forward conduction failure during negative excursions.
What is the maximum continuous power dissipation for BZG04-20TR3 at 50 °C ambient?
At Tamb = 50 °C with RthJA < 100 K/W, the BZG04-20TR3 is rated for 1.25 W continuous power dissipation. This value assumes adequate PCB copper area for heat spreading; actual derating must follow the thermal resistance curve in Figure 2 of the datasheet, especially when mounted on thin FR-4 without thermal vias. Exceeding this limit risks thermal runaway and permanent parametric shift in the BZG04-20TR3.
How does the clamping voltage of BZG04-20TR3 compare to its Zener voltage?
The BZG04-20TR3 clamps at 33.8 V under an 8.9 A 10/1000 µs surge, which is 1.48× its nominal Zener voltage (22.8 V). This clamping ratio reflects the dynamic impedance rise under high-current stress and is significantly lower than generic 1N47xx series diodes (typically >2×), making the BZG04-20TR3 more effective at limiting voltage overshoot during fast transients without requiring series impedance.
Is BZG04-20TR3 compatible with lead-free reflow soldering profiles?
Yes, the BZG04-20TR3 is qualified for lead-free reflow soldering per JEDEC J-STD-020, with a maximum peak temperature of 260 °C for 30 seconds. Its DO-214AC package and matte tin terminations withstand standard SAC305 thermal cycles without delamination or parameter shift. Verified reliability data confirms no degradation in VZ, IR, or surge performance after three reflow passes, ensuring robust manufacturability of the BZG04-20TR3 in high-volume SMT lines.
BZG04-20TR3 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):
- 20V
- Voltage - Breakdown (Min):
- 22.8V
- Voltage - Clamping (Max) @ Ipp:
- 33.8V
- Current - Peak Pulse (10/1000µs):
- 8.9A
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 570pF @ 1MHz
- Operating Temperature:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
BZG04-20TR3 FAQ
1.How can I place an order for BZG04-20TR3 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZG04-20TR3 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 BZG04-20TR3 reliable?
The price and inventory of BZG04-20TR3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZG04-20TR3 is usually 5 days.
3.What payment methods are accepted for BZG04-20TR3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZG04-20TR3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZG04-20TR3?
BZG04-20TR3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZG04-20TR3 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 BZG04-20TR3?
For technical support, including BZG04-20TR3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZG04-20TR3 requirements.
6.How does Aetrix verify that BZG04-20TR3 is sourced from the original manufacturer or authorized distributors?
All BZG04-20TR3 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 BZG04-20TR3 meets industry standards.
7.What is the process for return or replacement of BZG04-20TR3?
All BZG04-20TR3 units undergo pre-shipment inspection (PSI). If there is an issue with BZG04-20TR3, 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 BZG04-20TR3 part is unused and in its original packaging.
Return procedure for BZG04-20TR3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZG04-20TR3 Tags
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Diodes Incorporated
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