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STMicroelectronics BZW04-299RL
- Part No.:
- BZW04-299RL
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
BZW04-299RL.pdf
- Description:
- TVS DIODE 299VWM 618VC DO15
- Quantity:
- Payment:
- Shipping:
Inventory:8,908
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Product details
Overview
BZW04-299RL from STMicroelectronics is a unidirectional transient voltage suppression (TVS) diode in DO-15 package, designed for high-energy surge protection in power supply and interface 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 - deployed in industrial AC/DC front-end protection.
For engineers reviewing the BZW04-299RL datasheet, BZW04-299RL pinout, BZW04-299RL application, or BZW04-299RL equivalent, key selection criteria include clamping performance under 1.2 A surge, thermal derating above 25 °C, DO-15 mechanical compatibility, and IEC 61000-4-2/4-4 compliance for ESD and EFT immunity in mains-connected equipment.
Technical Context
This TVS diode uses planar silicon technology to achieve low leakage (<1 µA at VRM), stable VBR over temperature (αT = 10×10⁻⁴ /°C), and robust thermal performance up to 175 °C. Its unidirectional configuration provides asymmetric clamping with cathode-anode polarity, enabling DC-biased line protection without reverse conduction during normal operation.
The device delivers 438 V clamping at 1.2 A (10/1000 µs) and 564 V at 4.0 A (8/20 µs), with dynamic resistance (RD) of 85 Ω and 57 Ω respectively - critical for limiting let-through voltage during fast transients in SMPS input stages and motor drive DC bus lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRM) | 273 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA; defines minimum system DC rating for safe placement across protected lines. |
| Breakdown Voltage (VBR) | 273–304 V at 1 mA - sharp avalanche onset ensures predictable turn-on during overvoltage; ±5.7% tolerance supports design margining. |
| Clamping Voltage (VCL) | 438 V at 1.2 A (10/1000 µs) - limits peak voltage seen by downstream components during surge; enables MOSFET/gate driver survival in 400 V AC-input designs. |
| Peak Pulse Power | 400 W (10/1000 µs) - sustains standardized lightning-surge energy per IEC 61000-4-5; derates to 230 W at Tj = 175 °C per Figure 3. |
| Junction Temperature Range | −55 °C to +175 °C - supports operation in enclosed industrial enclosures and automotive under-hood environments without thermal shutdown. |
| ESD Withstand | ±30 kV contact & air discharge (IEC 61000-4-2 Level 4) - eliminates need for secondary ESD protection on board-level interfaces. |
| Leakage Current (IRM) | ≤1 µA at VRM - prevents measurable power loss in high-impedance bias networks and battery-backed circuits. |
Pinout & Package
DO-15 (JEDEC DO-204AC) axial-leaded package with matte tin-plated leads; total weight 0.4 g; lead spacing 26–31 mm; body diameter 2.95–3.53 mm; lead diameter 0.71–0.88 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (cathode band end) | Forward current entry terminal | Connected to lower-potential side (e.g., ground or return path); conducts during reverse surge when cathode is positive relative to anode. |
| Cathode (banded end) | Avalanche clamping terminal | Connected to higher-potential line (e.g., AC live or DC+); initiates avalanche breakdown when voltage exceeds VBR, shunting surge current to anode. |
Key Features
| Feature | Design Value |
|---|---|
| High-temperature operation | Rated for continuous use at 175 °C junction temperature - enables placement near heat-generating components without derating penalties. |
| Low dynamic resistance | RD = 85 Ω (10/1000 µs) - minimizes voltage overshoot during surge, improving protection margin for 600 V-rated power semiconductors. |
| Planar junction construction | Enables <1 µA leakage at VRM and tight VBR distribution - critical for low-power standby circuits and precision reference rails. |
| UL 497B certified | QVGQ2.E136224 listing - validates suitability for telecom and industrial signal line protection per UL safety standards. |
| IEC 61000-4-4 Level 4 compliance | Withstands 4 kV EFT bursts - meets immunity requirements for industrial control cabinets exposed to relay switching noise. |
Applications
| Industrial AC/DC Power Supply Input | Motor Drive DC Bus Protection |
|---|---|
Use Scenario: Installed across AC input terminals or bulk DC link capacitors in 3-phase rectifier front-ends. IC Role / Device Role / Timing Role: Unidirectional TVS diode clamping positive surges on DC+ rail relative to ground. Use Value: Limits let-through voltage to ≤438 V during 1.2 A 10/1000 µs surge, protecting 600 V IGBTs and electrolytic capacitors from overvoltage failure. |
Use Scenario: Mounted between DC+ and DC− rails in variable-frequency drives handling 400 V nominal bus voltage. IC Role / Device Role / Timing Role: Fast-acting voltage clamp suppressing commutation spikes and regenerative energy transients. Use Value: Clamps 8/20 µs surges to 564 V at 4.0 A, preventing gate oxide damage to SiC MOSFETs during rapid load changes. |
| Telecom Line Interface Protection | Renewable Energy Inverter DC Link |
Use Scenario: Placed on primary-side DC feed lines of PoE-powered remote units and DSLAM line cards. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing induced lightning surges coupled onto long copper runs. Use Value: Survives ±30 kV ESD (IEC 61000-4-2) and 4 kV EFT (IEC 61000-4-4), eliminating field failures in outdoor telecom cabinets. |
Use Scenario: Integrated into string-level DC optimizers and central inverters for solar PV systems with 1000 V DC arrays. IC Role / Device Role / Timing Role: High-VRMS TVS safeguarding MPPT controllers against grid-switching transients and lightning-induced surges. Use Value: Maintains 273 V standoff while clamping 400 W surges - compatible with 1500 V system insulation coordination and UL 1741 certification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ280A | DO-214AA package; 280 V VRM; 400 W rating; 45.5 V clamping at 8.8 A (10/1000 µs) | Lower clamping voltage but limited to 280 V standoff - unsuitable for 400 V DC bus protection where BZW04-299RL's 273 V VRM matches system margin. | Select when space-constrained SMT layout requires surface-mount form factor and lower clamping is prioritized over high-voltage standoff. |
| P6KE300A | DO-15 package; 300 V VRM; 600 W rating; 486 V clamping at 1.2 A (10/1000 µs) | Higher clamping voltage (+48 V) reduces protection margin for 600 V-rated devices; larger junction capacitance affects high-frequency noise filtering. | Choose only if legacy P6KE footprint reuse is mandatory and 486 V clamping remains within downstream component VDS(max) margin. |
Compared with SMBJ280A and P6KE300A, BZW04-299RL offers optimal balance of 273 V standoff, 438 V clamping, and DO-15 through-hole reliability - making it preferred for industrial power supplies where thermal stability at 175 °C and precise voltage coordination are critical.
Availability
BZW04-299RL is available at Aetrix Electronics and suitable for industrial AC/DC power supplies, motor drive DC bus protection, and renewable energy inverter DC links requiring stable component supply and long-term lifecycle support.
Supply support for BZW04-299RL 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 microcontrollers, power ICs, sensors, and discrete protection devices for industrial, automotive, and consumer markets.
BZW04-299RL belongs to ST's high-reliability TVS diode portfolio targeting ruggedized surge protection in harsh-environment power systems - engineered specifically for thermal stability, low leakage, and repeatable clamping performance in mission-critical infrastructure.
FAQ
What is the maximum clamping voltage of BZW04-299RL under a 10/1000 µs surge?
The maximum clamping voltage is 438 V at 1.2 A for a 10/1000 µs waveform, measured at Tj = 25 °C. This value increases linearly with junction temperature using αT = 10×10−4/°C, reaching ~480 V at 175 °C per datasheet Equation 2.
Can BZW04-299RL be used in bidirectional surge protection applications?
No - BZW04-299RL is unidirectional, marked with a single cathode band. For bidirectional protection, ST offers the BZW04-299B variant, which has symmetrical clamping in both polarities and dual-band marking per Figure 14.
What is the recommended PCB pad layout for DO-15 mounting to ensure thermal reliability?
Per Figure 12, use ≥2 cm² of 70 µm copper per lead to maintain Rth(j-a) ≤ 3.5 °C/W. Avoid narrow traces; connect each lead directly to internal ground/power planes with multiple thermal vias spaced ≤2 mm apart under solder pads.
Does BZW04-299RL meet RoHS and REACH requirements?
Yes - it carries ST's ECOPACK2 environmental compliance grade, meeting RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006, with lead-free matte tin plating and halogen-free epoxy molding compound per DS0660 Rev 4 Section 2.
BZW04-299RL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- BZW04, TRANSIL™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 299V
- Voltage - Breakdown (Min):
- 332V
- Voltage - Clamping (Max) @ Ipp:
- 618V
- Current - Peak Pulse (10/1000µs):
- 3.7A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 80pF @ 1MHz
- Operating Temperature:
- 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
BZW04-299RL FAQ
1.How can I place an order for BZW04-299RL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04-299RL 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 BZW04-299RL reliable?
The price and inventory of BZW04-299RL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW04-299RL is usually 5 days.
3.What payment methods are accepted for BZW04-299RL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04-299RL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04-299RL?
BZW04-299RL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04-299RL 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 BZW04-299RL?
For technical support, including BZW04-299RL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04-299RL requirements.
6.How does Aetrix verify that BZW04-299RL is sourced from the original manufacturer or authorized distributors?
All BZW04-299RL 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 BZW04-299RL meets industry standards.
7.What is the process for return or replacement of BZW04-299RL?
All BZW04-299RL units undergo pre-shipment inspection (PSI). If there is an issue with BZW04-299RL, 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 BZW04-299RL part is unused and in its original packaging.
Return procedure for BZW04-299RL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZW04-299RL Tags
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