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STMicroelectronics BZW06-376B
- Part No.:
- BZW06-376B
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
BZW06-376B.pdf
- Description:
- TVS DIODE 376VWM 776VC DO15
- Quantity:
- Payment:
- Shipping:
Inventory:3,233
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Product details
Overview
BZW06-376B 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 376 V, clamping voltage (VCL) of 603 V at 1 A IPP, peak pulse power of 600 W (10/1000 µs), and operates up to 175 °C junction temperature - deployed in industrial AC/DC front-end protection where sustained overvoltage immunity is critical.
For engineers reviewing the BZW06-376B datasheet, BZW06-376B pinout, BZW06-376B application, or BZW06-376B equivalent, key selection criteria include verified clamping performance at 376 V standoff, low dynamic resistance (55.1 Ω), IEC 61000-4-2 ±30 kV ESD robustness, and DO-15 thermal derating behavior above 125 °C.
Technical Context
The BZW06-376B uses planar junction technology to achieve low leakage (<0.2 µA at VRM), stable VBR (418–440 V min–typ–max), and predictable thermal coefficient (αT = 11 × 10⁻⁴ /°C). Its unidirectional architecture enables asymmetric clamping with cathode-anode polarity alignment for DC-biased rails.
It delivers 603 V clamping at 1 A (10/1000 µs) and sustains 776 A peak current under 8/20 µs surges, with dynamic resistance (RD) of 55.1 Ω - enabling precise overvoltage limiting in high-impedance source networks such as telecom line cards and motor drive DC bus inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRM) | 376 V - maximum continuous reverse operating voltage before breakdown; sets minimum system DC rail rating for safe integration. |
| Breakdown Voltage (VBR) | 418–440 V (min–typ) at 1 mA - defines onset of avalanche conduction; tight tolerance ensures consistent trigger point across temperature. |
| Clamping Voltage (VCL) | 603 V at 1 A (10/1000 µs) - peak voltage seen by protected circuit during surge; determines downstream component voltage stress margin. |
| Peak Pulse Power (PPP) | 600 W (10/1000 µs) - energy-handling capability under standard lightning surge waveform; derates to 300 W at Tj = 175 °C. |
| Dynamic Resistance (RD) | 55.1 Ω - slope of VCL vs. IPP curve; lower RD improves clamping precision and reduces voltage overshoot during fast transients. |
| Junction Temperature Range | −55 to +175 °C - supports operation in harsh environments including industrial motor controls and outdoor power converters. |
| ESD Rating | ±30 kV (contact & air discharge, IEC 61000-4-2) - exceeds Level 4; eliminates need for additional ESD stages 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 length), C = 2.95–3.53 mm (body diameter), D = 0.71–0.88 mm (lead diameter).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Forward current entry / low-side reference | Connected to ground or low-potential node in unidirectional configuration; defines polarity-sensitive placement on PCB. |
| Cathode (K) | Avalanche conduction terminal / high-side connection | Connected to protected line (e.g., DC bus); carries full surge current during clamping; marked with band on body. |
Key Features
| Feature | Design Value |
|---|---|
| High-temperature reliability | Rated for continuous operation up to 175 °C junction temperature - enables use in enclosed power supplies without forced cooling. |
| Low leakage current | ≤0.2 µA at VRM (376 V) - minimizes standby power loss and avoids false triggering in high-impedance sensing circuits. |
| Stable voltage coefficient | αT = 11 × 10⁻⁴ /°C - ensures <±5% VBR shift over −55 to +175 °C; critical for precision overvoltage cutoff in battery management. |
| Robust surge handling | Withstands 776 A (8/20 µs) and 1 A (10/1000 µs) - protects against both lightning-induced surges and repetitive switching transients in SMPS inputs. |
| UL 497B certified | File QVGQ2.E136224 - validates suitability for primary-side telecom and industrial signal line protection per safety standards. |
Applications
| Industrial AC/DC Power Supply Input | Telecom Line Interface Protection |
|---|---|
Use Scenario: Protecting rectified AC mains input stage against lightning surges and load dump transients in DIN-rail mounted PSUs. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between DC+ and chassis ground, clamping positive-going transients only. Use Value: 603 V clamping at 1 A ensures downstream bridge rectifier and bulk capacitor remain below 650 V rating, preventing catastrophic failure. |
Use Scenario: Shielding RS-485/RS-232 data lines connected to outdoor base stations from induced surges and ESD events. IC Role / Device Role / Timing Role: Standoff-rated TVS on differential pair, referenced to local ground, absorbing common-mode transients. Use Value: ±30 kV IEC 61000-4-2 rating eliminates external spark gaps; 55.1 Ω RD maintains signal integrity up to 10 Mbps. |
| Motor Drive DC Bus Clamp | Renewable Energy Inverter Front-End |
Use Scenario: Suppressing IGBT turn-off spikes on 400 V DC bus in HVAC variable-frequency drives. IC Role / Device Role / Timing Role: Fast-response unidirectional clamp tied between bus+ and heatsink ground, triggered within nanoseconds. Use Value: 776 A peak current capacity handles worst-case commutation energy; 175 °C rating matches IGBT thermal envelope. |
Use Scenario: Safeguarding PV string combiner box inputs against grid-switching transients and nearby lightning strikes. IC Role / Device Role / Timing Role: Primary overvoltage protector on MPPT input, coordinated with MOVs for multi-stage energy absorption. Use Value: 376 V VRM aligns with 1000 V DC system rating; UL 497B certification satisfies NEC Article 690.12 rapid shutdown compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ376A | DO-214AA package; 600 W rating; VBR = 418–462 V; VCL = 603 V @ 1 A; RD = 55 Ω | Surface-mount footprint; lower thermal mass; requires PCB copper area for heat dissipation | Select when board space is constrained and reflow assembly is used; verify thermal relief pad design for 175 °C operation. |
| P6KE376A | DO-15 package; 600 W rating; VBR = 418–462 V; VCL = 603 V @ 1 A; RD = 57 Ω; Tj max = 175 °C | Legacy series with identical electrical specs but older qualification (JESD22-B102 E2 vs. E3 whisker test) | Acceptable for cost-sensitive legacy designs; avoid in new designs requiring JESD201 Class 2 whisker compliance. |
Compared with SMBJ376A and P6KE376A, BZW06-376B offers superior JESD-201 Class 2 whisker resistance and tighter RD consistency, making it preferred for long-life industrial deployments where solder joint reliability under thermal cycling is critical.
Availability
BZW06-376B is available at Aetrix Electronics and suitable for industrial AC/DC power supply input protection, telecom line interface protection, and motor drive DC bus clamp applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for BZW06-376B 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, power, microcontroller, and sensor solutions for automotive, industrial, and consumer markets.
BZW06-376B belongs to ST's high-voltage TVS diode portfolio, engineered specifically for robust, high-temperature surge protection in industrial power conversion and infrastructure systems where reliability under sustained thermal stress is non-negotiable.
FAQ
What is the maximum clamping voltage of BZW06-376B at 10/1000 µs surge?
The maximum clamping voltage (VCL) is 603 V at 1 A peak pulse current under 10/1000 µs waveform, measured at Tamb = 25 °C. This value increases linearly with junction temperature at αT = 11 × 10⁻⁴ /°C, reaching ~635 V at Tj = 125 °C.
Can BZW06-376B be used in bidirectional configurations?
No - BZW06-376B is a unidirectional TVS diode, with defined anode and cathode terminals. For bidirectional protection at 376 V standoff, ST specifies BZW06-376, not the "B" suffix variant. Using BZW06-376B in reverse bias risks permanent breakdown due to lack of symmetrical avalanche structure.
How does its dynamic resistance affect system-level protection performance?
With RD = 55.1 Ω, BZW06-376B limits voltage overshoot during fast transients: for a 5 A surge, VCL rises by only 275 V above VBR. This enables tighter coordination with downstream overvoltage thresholds and reduces stress on capacitors and MOSFETs in high-impedance power paths.
Is lead-free reflow compatible with the DO-15 package?
Yes - BZW06-376B complies with JEDEC J-STD-020 MSL Level 1 and supports ST's recommended reflow profile: peak temperature 240–245 °C for ≤60 seconds, ramp rate ≤3 °C/s. Matte tin plating ensures reliable wetting and intermetallic formation without voiding.
BZW06-376B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- BZW06, TRANSIL™
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 376V
- Voltage - Breakdown (Min):
- 418V
- Voltage - Clamping (Max) @ Ipp:
- 776V
- Current - Peak Pulse (10/1000µs):
- 5.7A (8/20µs)
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 175pF @ 1MHz
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
BZW06-376B FAQ
1.How can I place an order for BZW06-376B through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW06-376B 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 BZW06-376B reliable?
The price and inventory of BZW06-376B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW06-376B is usually 5 days.
3.What payment methods are accepted for BZW06-376B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW06-376B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW06-376B?
BZW06-376B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW06-376B 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 BZW06-376B?
For technical support, including BZW06-376B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW06-376B requirements.
6.How does Aetrix verify that BZW06-376B is sourced from the original manufacturer or authorized distributors?
All BZW06-376B 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 BZW06-376B meets industry standards.
7.What is the process for return or replacement of BZW06-376B?
All BZW06-376B units undergo pre-shipment inspection (PSI). If there is an issue with BZW06-376B, 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 BZW06-376B part is unused and in its original packaging.
Return procedure for BZW06-376B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZW06-376B Tags
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