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Vishay General Semiconductor - Diodes Division BZW04-188B-E3/73
- Part No.:
- BZW04-188B-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04-188B-E3/73.pdf
- Description:
- TVS DIODE 188VWM 301VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:5,658
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Product details
Overview
BZW04-188B-E3/73 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode in DO-41 package, designed for clamping voltage transients on signal or power lines. It features 188 V standoff voltage (VWM), 209–231 V breakdown voltage (VBR) at 1 mA test current, and 301 V maximum clamping voltage (VC) at 1.4 A peak pulse current (IPPM), with 400 W peak pulse power rating under 10/1000 μs waveform.
For engineers reviewing the BZW04-188B-E3/73 datasheet, BZW04-188B-E3/73 pinout, BZW04-188B-E3/73 application, or BZW04-188B-E3/73 equivalent, this device serves as a robust, AEC-Q101-qualified protection solution for automotive sensor interfaces, industrial I/O lines, telecom line cards, and DC power rail surge suppression where bidirectional clamping and low leakage (<1 μA at VWM) are required.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with identical electrical characteristics forward and reverse - enabling protection of AC-coupled or floating signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown behavior and low incremental surge resistance, critical for consistent clamping during repetitive transients.
The device complies with ANSI/IEEE C62.35 surge standards and supports 10/1000 μs waveform testing per Fig. 3. Thermal derating follows a defined curve up to 175 °C junction temperature, and its DO-41 package allows through-hole mounting compatible with standard wave-soldering profiles (275 °C max, 10 s).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 188 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 200 V nominal DC rails. |
| VBR (min/max) | 209 V / 231 V at 1 mA - Confirmed breakdown range ensures reliable triggering across process variation and temperature. |
| VC @ IPPM | 301 V at 1.4 A - Clamping voltage under standardized 10/1000 μs surge; limits downstream voltage stress to ≤301 V. |
| PPPM | 400 W - Peak pulse power handling capability; sustains transient energy without failure under specified waveform. |
| ID @ VWM | <1 μA - Ultra-low reverse leakage preserves signal integrity and minimizes standby power loss in high-impedance circuits. |
| TJ max. | +175 °C - Extended junction temperature rating enables use in under-hood automotive and high-ambient industrial environments. |
| AEC-Q101 | Qualified - Validated for automotive electronics per stress test requirements including HTRB, HTGB, and temperature cycling. |
Pinout & Package
DO-41 (DO-204AL) axial-leaded package with matte tin-plated leads; no polarity marking - consistent with bidirectional functionality.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Leads are electrically interchangeable; bidirectional clamping occurs regardless of voltage polarity applied across terminals. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Ensures long-term stability of VBR and low leakage drift over temperature and lifetime, critical for automotive reliability. |
| 400 W peak pulse power (10/1000 μs) | Handles common surge events like ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 Level 3 surges without degradation. |
| AEC-Q101 qualification | Validates suitability for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. |
| UL 94 V-0 molding compound | Provides flame-retardant encapsulation meeting safety standards for industrial and telecom equipment enclosures. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ESD or inductive switch-off), improving system-level immunity. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN, LIN, or analog sensor signals (e.g., pressure, temperature) from load dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed at connector interface or IC input pin to limit transient voltage to safe levels. Use Value: Prevents latch-up or permanent damage to microcontrollers and analog front-ends while maintaining signal fidelity due to low capacitance and leakage. |
Use Scenario: Safeguarding digital input/output channels of programmable logic controllers against field-wiring surges and ground loop transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V DC I/O lines, installed upstream of optocouplers or level-shifting circuitry. Use Value: Enables >100,000 surge cycles without parameter shift, supporting long-life industrial deployments with minimal maintenance. |
| Telecom Line Card Protection | DC Power Rail Suppression |
Use Scenario: Shielding Ethernet PHY interfaces, RS-485 transceivers, or DSL line drivers from lightning-induced surges on outdoor-facing ports. IC Role / Device Role / Timing Role: First-stage protection device in multi-stage TVS + GDT architecture, absorbing initial high-energy portion of surge. Use Value: Withstands repeated 10/1000 μs surges up to 400 W, reducing need for costly secondary protection components. |
Use Scenario: Clamping voltage spikes on 12–48 V DC distribution rails caused by relay contact bounce or motor commutation in factory automation systems. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor across rail-to-ground, activated only during overvoltage events. Use Value: Maintains rail integrity below 301 V during 1.4 A transients, preventing brownouts or resets in connected embedded controllers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ188CA | DO-214AA package (SMB), 188 V VWM, 301 V VC @ 1.4 A - same clamping performance but surface-mount format. | Requires PCB redesign for SMT assembly; better suited for space-constrained or automated production environments. | Select SMBJ188CA when board real estate is limited or reflow soldering is preferred over through-hole wave soldering. |
| P6KE188A | DO-15 package, 188 V VWM, 301 V VC @ 1.4 A - same electrical specs but lower peak pulse power (600 W vs. 400 W rated, though actual tested value differs). | Higher PPPM rating allows margin for less predictable surge profiles; legacy design compatibility with older DO-15 footprints. | Choose P6KE188A if existing designs use DO-15 layout or require higher single-pulse energy tolerance beyond 400 W. |
Compared with BZW04-188B-E3/73, SMBJ188CA offers identical clamping performance in a smaller SMT package but lacks AEC-Q101 qualification, while P6KE188A provides higher peak power headroom and legacy footprint compatibility but does not meet automotive qualification requirements.
Availability
BZW04-188B-E3/73 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line card protection requiring stable component supply, RoHS compliance, and AEC-Q101 validation.
Supply support for BZW04-188B-E3/73 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability and automotive-grade qualification.
The BZW04 series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications demanding AEC-Q101 compliance and stable parametric performance.
FAQ
What is the polarity configuration of BZW04-188B-E3/73?
BZW04-188B-E3/73 is a bidirectional TVS diode with symmetrical anode/cathode terminals and no polarity marking. Its electrical characteristics - including VBR, VC, and ID - are identical in both directions, making it suitable for AC-coupled or floating signal lines where voltage polarity may reverse. This eliminates orientation errors during manual assembly.
Is BZW04-188B-E3/73 qualified for automotive applications?
Yes, BZW04-188B-E3/73 is AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling. The "HE3" suffix denotes AEC-Q101 qualification, and BZW04-188B-E3/73 carries the HE3 variant designation per Vishay's ordering nomenclature - confirming its suitability for under-hood and chassis-mounted automotive electronics.
What is the maximum clamping voltage of BZW04-188B-E3/73 under surge conditions?
The maximum clamping voltage (VC) of BZW04-188B-E3/73 is 301 V, measured at 1.4 A peak pulse current (IPPM) using the standardized 10/1000 μs waveform. This value represents the upper bound of voltage seen by downstream circuitry during a worst-case transient event, ensuring protected ICs remain within their absolute maximum ratings.
Does BZW04-188B-E3/73 have RoHS compliance and lead-free construction?
Yes, BZW04-188B-E3/73 is RoHS-compliant and lead-free, indicated by the "E3" suffix in its part number. The device uses matte tin-plated leads that meet J-STD-002 and JESD22-B102 solderability standards, and the molding compound satisfies UL 94 V-0 flammability requirements. Whisker resistance is certified to JESD201 Class 1A.
How does the thermal performance of BZW04-188B-E3/73 support high-ambient operation?
BZW04-188B-E3/73 supports continuous operation up to +175 °C junction temperature (TJ max.), with power derating defined in Figure 2 of its datasheet. At 100 °C ambient, it retains ~75% of its 1.5 W steady-state power dissipation capability, enabling reliable use in engine compartments, industrial control cabinets, and enclosed telecom housings without forced cooling.
BZW04-188B-E3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AL, DO-41, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Box (TB)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 188V
- Voltage - Breakdown (Min):
- 209V
- Voltage - Clamping (Max) @ Ipp:
- 301V
- Current - Peak Pulse (10/1000µs):
- 1.4A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
BZW04-188B-E3/73 FAQ
1.How can I place an order for BZW04-188B-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04-188B-E3/73 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 BZW04-188B-E3/73 reliable?
The price and inventory of BZW04-188B-E3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW04-188B-E3/73 is usually 5 days.
3.What payment methods are accepted for BZW04-188B-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04-188B-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04-188B-E3/73?
BZW04-188B-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04-188B-E3/73 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 BZW04-188B-E3/73?
For technical support, including BZW04-188B-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04-188B-E3/73 requirements.
6.How does Aetrix verify that BZW04-188B-E3/73 is sourced from the original manufacturer or authorized distributors?
All BZW04-188B-E3/73 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 BZW04-188B-E3/73 meets industry standards.
7.What is the process for return or replacement of BZW04-188B-E3/73?
All BZW04-188B-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with BZW04-188B-E3/73, 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 BZW04-188B-E3/73 part is unused and in its original packaging.
Return procedure for BZW04-188B-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZW04-188B-E3/73 Tags
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