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STMicroelectronics BZW04-376BRL
- Part No.:
- BZW04-376BRL
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
BZW04-376BRL.pdf
- Description:
- TVS DIODE 376VWM 603VC DO15
- Quantity:
- Payment:
- Shipping:
Inventory:1,877
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Product details
Overview
BZW04-376BRL from STMicroelectronics is a bidirectional 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 376 V, clamping voltage (VCL) of 603 V at 0.8 A IPP (10/1000 µs), peak pulse power of 400 W (10/1000 µs), and operates up to 175 °C junction temperature - ideal for industrial AC/DC front-end protection and telecom line interfaces.
For engineers reviewing the BZW04-376BRL datasheet, BZW04-376BRL pinout, BZW04-376BRL application, or BZW04-376BRL equivalent, key selection criteria include verified clamping behavior at 603 V under 0.8 A surge, low dynamic resistance (105 Ω), 70 pF junction capacitance at 1 V, compliance with IEC 61000-4-2 (±30 kV contact/air) and IEC 61000-4-4 Level 4 (4 kV), and DO-15 mechanical compatibility with legacy through-hole layouts.
Technical Context
This bidirectional TVS diode uses planar silicon technology to achieve stable leakage current (<1 µA at VRM) and high thermal robustness across –55 °C to +175 °C operating range. Its symmetrical avalanche structure enables identical clamping in both polarities, supporting AC-coupled protection without polarity concerns.
The device delivers 400 W peak pulse power (10/1000 µs) at 25 °C ambient, derating to 230 W at Tj = 175 °C. Its dynamic resistance (RD = 105 Ω) and low junction capacitance (70 pF @ 1 V) ensure minimal signal distortion in medium-speed data lines while maintaining fast response (<1 ns) to transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRM) | 376 V - maximum continuous reverse working voltage before conduction begins; sets minimum system operating margin. |
| Clamping Voltage (VCL) | 603 V at 0.8 A (10/1000 µs) - peak voltage seen by protected circuit during specified surge; defines protection threshold. |
| Peak Pulse Power (PPP) | 400 W (10/1000 µs) - energy-handling capability for standard lightning/surge waveforms; validates front-end rail protection. |
| Junction Capacitance (CJ) | 70 pF at 1 V - low enough to avoid signal integrity degradation on <10 MHz analog/power lines; measured at 1 MHz. |
| Leakage Current (IRM) | 1 µA max at VRM - ensures negligible standby power loss and no interference with high-impedance sensing circuits. |
| Operating Junction Temp | –55 °C to +175 °C - supports deployment in enclosed industrial enclosures, outdoor power supplies, and automotive under-hood environments. |
| ESD Robustness | ±30 kV (IEC 61000-4-2, contact & air) - exceeds Level 4 immunity; eliminates need for external ESD staging in field-deployed equipment. |
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 (Lead 1) | Transient current entry (negative polarity) | Conducts during negative surges; symmetric with cathode due to bidirectional construction. |
| Cathode (Lead 2) | Transient current entry (positive polarity) | Conducts during positive surges; identical electrical behavior to anode - no polarity marking required. |
Key Features
| Feature | Design Value |
|---|---|
| High-temperature operation | Rated for continuous use up to 175 °C junction temperature - enables placement near heat-generating components like rectifiers or MOSFETs. |
| Low dynamic resistance | RD = 105 Ω - minimizes voltage overshoot during fast-rising surges (e.g., 8/20 µs), improving protection margin for downstream ICs. |
| Stable leakage performance | <1 µA at VRM across full temperature range - prevents false triggering and preserves battery life in always-on systems. |
| UL 497B certified | File QVGQ2.E136224 - validates suitability for telecom and industrial signal line protection per safety standards. |
| MSL Level 1 rating | No moisture sensitivity - allows indefinite dry storage and standard reflow without baking, reducing manufacturing overhead. |
Applications
| Industrial AC/DC Power Supply Input | Telecom Line Interface Protection |
|---|---|
|
Use Scenario: Protection of primary-side rectifier inputs against lightning-induced surges on 230 VAC mains. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across input bridge rectifier output to limit transient overvoltage. Use Value: Withstands 400 W (10/1000 µs) surges and clamps to 603 V, ensuring downstream fuse coordination and preventing MOV degradation. |
Use Scenario: Surge protection on POTS or xDSL line cards exposed to induced surges from nearby power lines. IC Role / Device Role / Timing Role: Primary-level TVS across differential pair (tip/ring) to suppress common-mode transients per ITU-T K.20/K.21. Use Value: 70 pF capacitance avoids signal attenuation at voiceband frequencies; ±30 kV ESD rating meets GR-1089-CORE requirements. |
| Motor Drive DC Bus Protection | Renewable Energy Inverter DC Link |
|
Use Scenario: Clamping inductive kickback from IGBT gate drivers and relay coils in variable-frequency drives. IC Role / Device Role / Timing Role: Parallel-connected TVS across DC bus capacitors to absorb switching noise and commutation spikes. Use Value: 175 °C operation matches IGBT heatsink temperatures; 230 W derated power at Tj = 175 °C ensures reliability under sustained load. |
Use Scenario: Overvoltage suppression on photovoltaic string outputs feeding MPPT controllers in solar inverters. IC Role / Device Role / Timing Role: Standoff-rated protection on ungrounded DC strings subject to lightning coupling and ground potential rise. Use Value: 376 V VRM aligns with 1000 V DC system ratings; bidirectional symmetry accommodates floating reference and polarity reversal events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ376CA | DO-214AA package; 600 V VCL at 0.8 A; 600 W PPP (10/1000 µs); 100 pF CJ | Surface-mount only; higher capacitance limits use in >1 MHz signal paths | Select when board space is constrained and SMT assembly is mandatory; verify thermal pad layout for 175 °C operation. |
| P6SMB376CA | DO-214AA; same VCL/PPP specs; 100 pF CJ; UL 497B certified (E136224 same file) | Higher leakage (5 µA max); not rated for 175 °C continuous operation (Tj max = 150 °C) | Prefer for cost-sensitive consumer designs where ambient temperature stays below 85 °C and ESD margin is secondary. |
Compared with SMBJ376CA and P6SMB376CA, BZW04-376BRL offers lower junction capacitance (70 pF vs. ≥100 pF), superior high-temperature endurance (175 °C vs. ≤150 °C), and through-hole DO-15 compatibility - making it optimal for ruggedized industrial power modules requiring long-term thermal stability and legacy layout reuse.
Availability
BZW04-376BRL is available at Aetrix Electronics and suitable for industrial AC/DC power supply input protection, telecom line interface protection, and motor drive DC bus protection requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for BZW04-376BRL 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 devices, sensors, and protection components for industrial, automotive, and consumer markets.
BZW04 belongs to ST's high-reliability TVS diode portfolio, engineered specifically for robust surge immunity in harsh environments - emphasizing thermal resilience, low leakage, and compliance with IEC/UL telecom and industrial safety standards.
FAQ
Is BZW04-376BRL unidirectional or bidirectional?
BZW04-376BRL is a bidirectional TVS diode, indicated by the "B" suffix in the part number and confirmed in Table 2 of DS0660 Rev 4. Its symmetrical breakdown behavior provides identical clamping voltage (603 V) for both positive and negative transients, eliminating polarity concerns in AC or floating DC applications.
What is the maximum surge current (IPP) this device can handle?
At 10/1000 µs waveform, BZW04-376BRL sustains 0.8 A peak pulse current (IPP) with a clamping voltage of 603 V. For 8/20 µs surges, its rated IPP rises to 3.0 A (per Table 2), delivering up to 2.3 kW peak power - validated in Figure 5 of the datasheet.
Can BZW04-376BRL be used in surface-mount designs?
No - BZW04-376BRL uses the axial DO-15 (JEDEC DO-204AC) through-hole package and is not compatible with SMT reflow or pick-and-place processes. For surface-mount equivalents, consider SMBJ376CA (DO-214AA) or P6SMB376CA, which share similar electrical specs but differ in thermal and mechanical performance.
Does this TVS diode require a heatsink for 400 W surge handling?
No external heatsink is required for single-event 400 W (10/1000 µs) surges, as energy dissipation occurs too briefly for significant thermal accumulation. However, PCB copper area under each lead (≥2 cm² recommended per Figure 12) is critical to maintain Rth(j-a) ≤ 4.5 °C/W and prevent junction overheating during repeated surges or elevated ambient conditions.
BZW04-376BRL 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 376V
- Voltage - Breakdown (Min):
- 418V
- Voltage - Clamping (Max) @ Ipp:
- 603V
- Current - Peak Pulse (10/1000µs):
- 800mA
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 35pF @ 1MHz
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
BZW04-376BRL FAQ
1.How can I place an order for BZW04-376BRL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04-376BRL 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 BZW04-376BRL reliable?
The price and inventory of BZW04-376BRL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW04-376BRL is usually 5 days.
3.What payment methods are accepted for BZW04-376BRL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04-376BRL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04-376BRL?
BZW04-376BRL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04-376BRL 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 BZW04-376BRL?
For technical support, including BZW04-376BRL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04-376BRL requirements.
6.How does Aetrix verify that BZW04-376BRL is sourced from the original manufacturer or authorized distributors?
All BZW04-376BRL 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 BZW04-376BRL meets industry standards.
7.What is the process for return or replacement of BZW04-376BRL?
All BZW04-376BRL units undergo pre-shipment inspection (PSI). If there is an issue with BZW04-376BRL, 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 BZW04-376BRL part is unused and in its original packaging.
Return procedure for BZW04-376BRL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZW04-376BRL Tags
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