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STMicroelectronics BZW04-299BRL
- Part No.:
- BZW04-299BRL
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
BZW04-299BRL.pdf
- Description:
- TVS DIODE 299VWM 482VC DO15
- Quantity:
- Payment:
- Shipping:
Inventory:3,638
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Product details
Overview
BZW04-299BRL from STMicroelectronics is a unidirectional transient voltage suppression (TVS) diode in DO-15 package, designed for high-energy ESD and surge protection in power rails and signal lines. It features a standoff voltage (VRM) of 273 V, minimum breakdown voltage (VBR) of 273 V at 1 mA, clamping voltage (VCL) of 438 V at 1.2 A (10/1000 µs), peak pulse power of 400 W, and operates up to 175 °C junction temperature - ideal for industrial AC/DC front-end protection.
For engineers reviewing the BZW04-299BRL datasheet, BZW04-299BRL pinout, BZW04-299BRL application, or BZW04-299BRL equivalent, key selection criteria include verified clamping performance at 1.2 A surge current, low dynamic resistance (85 Ω), high Tj max rating (175 °C), and compliance with IEC 61000-4-2 (±30 kV contact/air) and IEC 61000-4-4 Level 4 (4 kV).
Technical Context
This TVS diode uses planar silicon technology to achieve low leakage (<1 µA at VRM), stable VBR over temperature (αT = 11.0 × 10⁻⁴ /°C), and robust thermal performance up to 175 °C. Its unidirectional configuration provides asymmetric clamping optimized for DC-biased lines where reverse conduction must be blocked.
The device delivers 400 W peak pulse power under 10/1000 µs waveform and sustains up to 230 W at Tj = 175 °C. Its DO-15 package supports manual and automated assembly with JEDEC-compliant reflow profile and matte tin lead finish meeting J-STD-002 E3 and JESD-22-B102 whisker standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRM) | 273 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| Breakdown Voltage (VBR) | 273–304 V at 1 mA - precise threshold for initiating avalanche clamping during overvoltage events |
| Clamping Voltage (VCL) | 438 V at 1.2 A (10/1000 µs) - limits downstream voltage stress during standardized surge transients |
| Peak Pulse Power (PPP) | 400 W (10/1000 µs) - energy-handling capability sufficient for IEC 61000-4-4 Level 4 surges |
| Junction Temperature Range | −55 °C to +175 °C - enables reliable operation in harsh industrial and automotive under-hood environments |
| ESD Robustness | ±30 kV contact & air discharge per IEC 61000-4-2 - exceeds Level 4 for system-level ESD immunity |
| Dynamic Resistance (RD) | 85 Ω - determines voltage overshoot margin under fast-rising transients (e.g., 8/20 µs lightning surges) |
Pinout & Package
DO-15 (JEDEC DO-204AC) package: axial-leaded, epoxy-molded, matte tin-plated leads. Dimensions: A = 6.05–6.75 mm (body length), B = 26–31 mm (lead spacing), C = 2.95–3.53 mm (diameter), D = 0.71–0.88 mm (lead diameter). RoHS-compliant, ECOPACK2 grade.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (cathode-banded end) | Forward conduction terminal | Connects to protected line; conducts during positive transients when cathode is biased higher than anode |
| Cathode (banded end) | Avalanche clamping terminal | Connected toward ground or lower-potential rail; defines polarity and clamping direction for unidirectional operation |
Key Features
| Feature | Design Value |
|---|---|
| High-temperature operation | Rated for continuous use up to 175 °C junction temperature - eliminates derating concerns in enclosed power supplies |
| Low leakage current | <1 µA at VRM = 273 V - prevents parasitic loading on high-impedance DC bias networks |
| Stable voltage-temperature coefficient | αT = 11.0 × 10⁻⁴ /°C - ensures predictable VBR shift across industrial temperature range |
| Robust surge handling | Withstands 400 W (10/1000 µs) and 564 A (8/20 µs) - meets IEC 61000-4-4 and MIL-STD-883 requirements |
| Industry-standard packaging | DO-15 outline with tape-and-reel (6000 pcs/reel) - compatible with legacy through-hole and selective soldering processes |
Applications
| Industrial AC/DC Power Supply Input Protection | Telecom Line Interface Surge Suppression |
|---|---|
Use Scenario: Protecting rectified AC input stage of 240 VAC SMPS against lightning-induced surges and switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between bridge rectifier output and bulk capacitor to clamp positive overvoltage spikes. Use Value: Clamps to 438 V at 1.2 A, limiting stress on 450 V-rated electrolytic capacitors and ensuring >100,000 surge cycles per IEC 61000-4-4. |
Use Scenario: Safeguarding RS-485 transceiver power rails in outdoor base stations exposed to induced surges. IC Role / Device Role / Timing Role: Primary protection on +12 V bias rail upstream of local LDO regulators and interface ICs. Use Value: Withstands 4 kV IEC 61000-4-4 bursts while maintaining <1 µA leakage at 273 V standoff - avoids false resets or brownouts. |
| Motor Drive DC Bus Overvoltage Clamp | Renewable Energy Inverter DC Link Protection |
Use Scenario: Mitigating regenerative voltage spikes on 300–400 V DC bus during rapid motor deceleration in HVAC inverters. IC Role / Device Role / Timing Role: Fast-response clamping element parallel to bus capacitor, triggered by dV/dt exceeding 100 V/µs. Use Value: Delivers 564 A peak current (8/20 µs) with 85 Ω RD - reduces overshoot to ≤450 V, preventing IGBT desaturation faults. |
Use Scenario: Protecting photovoltaic string combiner box inputs against grid-switching transients and nearby lightning coupling. IC Role / Device Role / Timing Role: First-stage protection on 600 V-class PV input, coordinated with MOVs and gas discharge tubes. Use Value: Stable 273 V VRM and 175 °C Tj rating enable long-term reliability in unventilated outdoor enclosures with ambient up to 85 °C. |
Availability
BZW04-299BRL is available at Aetrix Electronics and suitable for industrial AC/DC power supply input protection, telecom line interface surge suppression, motor drive DC bus overvoltage clamp, and renewable energy inverter DC link protection requiring stable component supply and long-lifecycle support.
Supply support for BZW04-299BRL 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.
The BZW04 series belongs to ST's high-reliability TVS diode portfolio, engineered specifically for robust transient suppression in high-voltage DC applications where thermal stability, low leakage, and repeatable clamping are critical.
FAQ
What is the difference between BZW04-299BRL and BZW04-299RL?
BZW04-299BRL is the bidirectional version (marked with "B"), offering symmetrical clamping for AC-coupled or floating signal lines, while BZW04-299RL is unidirectional and intended for DC-biased rails. The "B" suffix changes the internal structure to dual-avalanche junctions, increasing capacitance and reducing VBR symmetry tolerance but enabling bipolar transient suppression.
Can BZW04-299BRL replace a MOV in AC mains protection?
No - BZW04-299BRL is rated for 273 V standoff and 400 W pulses, making it unsuitable as a primary AC mains protector. It functions best as secondary protection downstream of MOVs or GDTs, clamping residual transients that bypass upstream devices. Its low leakage and precise VBR suit it for sensitive DC-side protection, not line-voltage AC applications.
What is the maximum surge current BZW04-299BRL can handle without degradation?
Per DS0660 Rev 4, BZW04-299BRL withstands 564 A (8/20 µs) and 1.2 A (10/1000 µs) single pulses with no parameter shift. For repetitive surges, derating applies: at Tj = 175 °C, peak power drops to 230 W (10/1000 µs), corresponding to ~0.7 A. Lifetime endurance depends on pulse count, duty cycle, and PCB copper area per Figure 12.
Does BZW04-299BRL require heatsinking in typical applications?
Not typically - its DO-15 package achieves Rth(j-a) ≈ 4.5 °C/W with 5 cm² copper per lead (Figure 12). At 400 W peak power, junction temperature rise is transient and self-limiting. However, for sustained surge repetition (>1 Hz), ≥2 cm² of 70 µm Cu per lead is recommended to maintain Tj ≤ 175 °C per Figure 3.
BZW04-299BRL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- BZW04, TRANSIL™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 299V
- Voltage - Breakdown (Min):
- 332V
- Voltage - Clamping (Max) @ Ipp:
- 482V
- Current - Peak Pulse (10/1000µs):
- 900mA
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 40pF @ 1MHz
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
BZW04-299BRL FAQ
1.How can I place an order for BZW04-299BRL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04-299BRL 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 BZW04-299BRL reliable?
The price and inventory of BZW04-299BRL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW04-299BRL is usually 5 days.
3.What payment methods are accepted for BZW04-299BRL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04-299BRL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04-299BRL?
BZW04-299BRL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04-299BRL 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 BZW04-299BRL?
For technical support, including BZW04-299BRL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04-299BRL requirements.
6.How does Aetrix verify that BZW04-299BRL is sourced from the original manufacturer or authorized distributors?
All BZW04-299BRL 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 BZW04-299BRL meets industry standards.
7.What is the process for return or replacement of BZW04-299BRL?
All BZW04-299BRL units undergo pre-shipment inspection (PSI). If there is an issue with BZW04-299BRL, 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 BZW04-299BRL part is unused and in its original packaging.
Return procedure for BZW04-299BRL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZW04-299BRL Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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ESD5Z3.3T1G
onsemi
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D5V0H1B2LP-7B
Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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