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STMicroelectronics BZW50-180
- Part No.:
- BZW50-180
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- R-6, Axial
- Datasheet:
-
BZW50-180.pdf
- Description:
- TVS DIODE 180VWM 410VC R6
- Quantity:
- Payment:
- Shipping:
Inventory:166
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Product details
Overview
BZW50-180 from STMicroelectronics is a unidirectional transient voltage suppression (TVS) diode designed for high-energy surge protection in DC power lines and signal interfaces. It features a 180 V stand-off voltage (VRM), 200 V minimum breakdown voltage (VBR), 322 V maximum clamping voltage (VCL) at 16 A (10/1000 µs), and 5000 W peak pulse power rating. It operates up to 175 °C junction temperature and is used in industrial power supplies, telecom line cards, and automotive ECUs requiring IEC 61000-4-2 (30 kV contact/air) and IEC 61000-4-4 (4 kV level 4) compliance.
For engineers reviewing the BZW50-180 datasheet, BZW50-180 pinout, BZW50-180 application, or BZW50-180 equivalent, key selection criteria include clamping voltage margin relative to protected IC rails, thermal derating above 25 °C, bidirectional vs. unidirectional topology fit for AC/DC biasing, and R6 package solderability per J-STD-020 reflow profile.
Technical Context
The BZW50-180 employs planar silicon avalanche junction technology optimized for low leakage (<5 µA at VRM) and stable VBR temperature coefficient (αT = 10.8 × 10⁻⁴ /°C). Its dynamic resistance (RD = 6.31 Ω) enables predictable VCL rise under increasing IPP, supporting accurate overvoltage margining in 48 V–300 V DC systems.
It delivers 3700 W surge capability at Tj = 175 °C (10/1000 µs), enabling reliable operation in thermally constrained enclosures. The device meets UL 497B (QVGQ2.E136224), IEC 61000-4-2 level 4 (30 kV), and IEC 61000-4-4 level 4 (4 kV), with matte tin lead finish compliant to JESD 22-B102 E3 and MIL-STD-750 method 2026.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRM) | 180 V - Maximum continuous reverse operating voltage before leakage exceeds 5 µA |
| Breakdown Voltage (VBR) | 200 V min @ IBR = 1 mA - Avalanche conduction onset threshold for reliable triggering |
| Clamping Voltage (VCL) | 322 V max @ IPP = 16 A (10/1000 µs) - Peak voltage seen by protected circuit during surge |
| Peak Pulse Power (PPP) | 5000 W @ 10/1000 µs - Sustained energy absorption capacity under standard lightning surge waveform |
| Junction Temperature (Tj) | -55 to +175 °C - Enables deployment in under-hood automotive or high-ambient industrial environments |
| Dynamic Resistance (RD) | 6.31 Ω - Determines VCL slope vs. current; critical for calculating worst-case clamping at application-specific IPP |
| Leakage Current (IRM) | ≤5 µA @ VRM - Ensures minimal standby power loss and no false triggering in high-impedance circuits |
Pinout & Package
The BZW50-180 is housed in the axial-leaded R6 package (JEDEC DO-201AD), featuring two terminals: anode and cathode. Cathode identified by molded band; leads are matte tin-plated for solderability and RoHS compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge current entry point (unidirectional) | Connected to protected line; conducts only during reverse-biased avalanche event |
| Cathode | Surge current return path | Marked with band; tied to system ground or lower-potential rail to shunt transients |
Key Features
| Feature | Design Value |
|---|---|
| High-temperature surge capability | 3700 W @ Tj = 175 °C (10/1000 µs) - Maintains protection integrity in sealed enclosures without active cooling |
| Low dynamic resistance | 6.31 Ω - Minimizes VCL overshoot across wide IPP range, improving margin for 200–300 V rail protection |
| IEC 61000-4-2 level 4 compliance | 30 kV contact & air discharge - Validated immunity for human-handling ESD in field-deployed equipment |
| Planar junction construction | Low leakage (<5 µA) and stable αT (10.8 × 10⁻⁴ /°C) - Ensures long-term reliability in SMPS feedback loops and precision sensing paths |
| UL 497B recognition | File QVGQ2.E136224 - Supports safety-certified designs for telecom and industrial power interface applications |
Applications
| Industrial Motor Drives | Telecom Line Interface Cards |
|---|---|
Use Scenario: Protection of 24–48 V DC control inputs against inductive kickback and lightning-induced surges on factory floor PLC I/O modules. IC Role / Device Role: Primary clamping element placed between input terminal and ground, absorbing >95% of 1 kV/500 A surge energy. Use Value: Prevents latch-up or gate oxide damage in optocouplers and microcontroller GPIOs rated for ≤36 V absolute maximum. | Use Scenario: Surge suppression on -48 V DC power feeds and RS-485 data lines in central office line cards exposed to induced surges from nearby power cables. IC Role / Device Role: Unidirectional TVS connected anode-to-line, cathode-to-ground to clamp negative transients while blocking normal -48 V bias. Use Value: Limits clamped voltage to ≤322 V, ensuring downstream DC/DC converters and PHY ICs remain within safe operating area. |
| Automotive Body Control Modules | Renewable Energy Inverters |
Use Scenario: Input protection for 12 V battery-supplied LIN bus transceivers and sensor interfaces in engine bay modules subject to load dump and ISO 7637-2 pulses. IC Role / Device Role: Standoff-rated TVS placed upstream of LDO regulators and CAN/LIN PHYs to absorb repetitive 100 V/100 ms transients. Use Value: Withstands 175 °C ambient and maintains <5 µA leakage, avoiding regulator dropout or false wake-up in sleep mode. | Use Scenario: DC-link overvoltage suppression in solar string inverters where PV array open-circuit voltage reaches 1000 V, and switching transients exceed 600 V. IC Role / Device Role: Secondary clamping stage after MOVs, handling fast-rising edge transients (8/20 µs) that bypass bulk suppressors. Use Value: Delivers 410 A peak pulse current (8/20 µs) at 410 V clamping, limiting stress on IGBT gate drivers and isolation amplifiers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ180A | Same VRM (180 V), but lower PPP (600 W), higher VCL (324 V), and SMB package (surface-mount) | Not suitable for >1 kA surge events; limited thermal mass reduces sustained energy handling | Select when board space is constrained and surge threat is limited to IEC 61000-4-2 only |
| P6KE180A | Same VRM (180 V), lower PPP (600 W), higher VCL (324 V), DO-15 package, legacy construction | Larger RD (7.2 Ω) and higher leakage (>10 µA) reduce margin in precision analog front-ends | Choose only for cost-sensitive, non-safety-critical replacements where R6 footprint is unavailable |
Compared with SMBJ180A and P6KE180A, the BZW50-180 provides 8.3× higher peak power (5000 W vs. 600 W), lower dynamic resistance (6.31 Ω vs. ≥7.2 Ω), and superior high-temperature stability-making it the only option qualified for industrial-grade 10/1000 µs surge immunity above 1 kA.
Availability
BZW50-180 is available at Aetrix Electronics and suitable for industrial motor drives, telecom line interface cards, and automotive body control modules requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for BZW50-180 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, delivering intelligent power, analog, MEMS, and microcontroller solutions for automotive, industrial, and consumer markets.
The BZW50 series belongs to ST's high-power TVS portfolio, engineered specifically for robust, high-reliability surge protection in harsh-environment power conversion and communication infrastructure applications.
FAQ
What is the maximum clamping voltage of BZW50-180 at 10 A (10/1000 µs)?
The maximum clamping voltage is 322 V at 16 A (10/1000 µs). At 10 A, VCL is approximately 305 V, calculated using VCL = VCL(16A) − RD × (16 − 10) = 322 − 6.31 × 6 ≈ 305 V. This value assumes Tj = 25 °C; derating applies above ambient.
Can BZW50-180 be used in bidirectional signal lines?
No - BZW50-180 is unidirectional and must be connected with cathode to ground or reference potential. For bidirectional protection, use the BZW50-180B variant, which has symmetrical breakdown in both polarities and identical clamping performance in either direction.
How does junction temperature affect breakdown voltage?
VBR increases with temperature at αT = 10.8 × 10⁻⁴ /°C. At Tj = 125 °C, VBR rises by (125 − 25) × 0.00108 = 10.8%, resulting in ~221.6 V minimum. This positive TC ensures stable triggering under thermal stress without premature conduction.
Is the R6 package compatible with automated through-hole insertion and wave soldering?
Yes - the R6 package (DO-201AD) supports both wave soldering (per AN5088 guidelines) and selective soldering. Lead spacing (25.4 mm) and diameter (1.25 mm typ.) meet IPC-A-610 Class 2 mechanical requirements, and matte tin plating ensures wetting compatibility with SnPb and lead-free solder alloys.
BZW50-180 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- R-6, Axial
- Series:
- BZW50, TRANSIL™
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 180V
- Voltage - Breakdown (Min):
- 200V
- Voltage - Clamping (Max) @ Ipp:
- 410V
- Current - Peak Pulse (10/1000µs):
- 146A (8/20µs)
- Power - Peak Pulse:
- 5000W (5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 1500pF @ 1MHz
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- R-6
BZW50-180 FAQ
1.How can I place an order for BZW50-180 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW50-180 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 BZW50-180 reliable?
The price and inventory of BZW50-180 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW50-180 is usually 5 days.
3.What payment methods are accepted for BZW50-180?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW50-180 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW50-180?
BZW50-180 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW50-180 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 BZW50-180?
For technical support, including BZW50-180 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW50-180 requirements.
6.How does Aetrix verify that BZW50-180 is sourced from the original manufacturer or authorized distributors?
All BZW50-180 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 BZW50-180 meets industry standards.
7.What is the process for return or replacement of BZW50-180?
All BZW50-180 units undergo pre-shipment inspection (PSI). If there is an issue with BZW50-180, 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 BZW50-180 part is unused and in its original packaging.
Return procedure for BZW50-180:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZW50-180 Tags
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