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Vishay General Semiconductor - Diodes Division BZW04P128HE3/73
- Part No.:
- BZW04P128HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04P128HE3/73.pdf
- Description:
- TVS DIODE 128VWM 207VC DO204AL
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
BZW04P128HE3/73 from Vishay General Semiconductor is a bi-directional TransZorb® transient voltage suppressor (TVS) diode designed for robust overvoltage protection in signal and power lines. It features a 128 V standoff voltage (VWM), 207 V clamping voltage (VC) at 2.0 A peak pulse current (IPPM), and 400 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed in automotive sensor interfaces, industrial I/O protection, and telecom line surge suppression.
For engineers reviewing the BZW04P128HE3/73 datasheet, BZW04P128HE3/73 pinout, BZW04P128HE3/73 application, or BZW04P128HE3/73 equivalent, key selection criteria include its AEC-Q101 qualification, DO-204AL (DO-41) package compatibility, bi-directional clamping symmetry, and verified 175 °C junction temperature rating for under-hood and high-reliability embedded systems.
Technical Context
This bi-directional TVS diode operates symmetrically in both polarities, delivering consistent clamping performance without polarity dependence. Its glass-passivated junction ensures stable breakdown behavior and low incremental surge resistance, critical for repeatable transient suppression across automotive and industrial duty cycles.
The device complies with ANSI/IEEE C62.35 surge standards and supports repetitive 10/1000 μs transients at 0.01% duty cycle. Its 1.5 W steady-state power dissipation (PD) and -55 °C to +175 °C operating range enable deployment in thermally demanding environments without derating concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 128 V - maximum continuous reverse working voltage before clamping initiates; defines safe operating margin for 120 VAC-derived or 110 VDC bus applications. |
| VC @ IPPM | 207 V - clamping voltage at 2.0 A peak pulse current; limits downstream IC stress during ESD or lightning-induced surges. |
| PPPM | 400 W - peak pulse power handling with 10/1000 μs waveform; meets IEC 61000-4-5 Level 3 surge immunity requirements. |
| TJ max. | +175 °C - maximum junction temperature; enables direct placement near hot components (e.g., power MOSFETs, motor drivers) without thermal derating. |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD47. |
| Package | DO-204AL (DO-41) - industry-standard axial leaded package with matte tin-plated leads compliant to J-STD-002 solderability. |
| ID @ VWM | 1.0 μA - maximum reverse leakage at 128 V; ensures minimal standby power loss in always-on circuits. |
Pinout & Package
DO-204AL (DO-41) package: axial-leaded, molded epoxy body with glass-passivated chip junction. No polarity marking - bi-directional operation confirmed by absence of cathode band per datasheet Note on polarity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional transient conduction path | Both terminals function identically; no DC polarity constraint - simplifies PCB layout and eliminates orientation errors during assembly. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Enables stable, low-drift breakdown voltage over lifetime and temperature - critical for long-term reliability in unattended systems. |
| 400 W peak pulse power (10/1000 μs) | Supports repeated surge events per IEC 61000-4-5 without parameter shift - suitable for industrial fieldbus nodes exposed to frequent switching transients. |
| AEC-Q101 qualification | Validated for automotive under-hood use including temperature cycling (-55 °C to +175 °C), humidity, and mechanical shock - reduces qualification effort for Tier 1 suppliers. |
| RoHS-compliant & JESD201 Class 2 whisker tested | Meets global environmental regulations and mitigates tin whisker risk in high-reliability assemblies - approved for medical and avionics-adjacent designs. |
| UL 94 V-0 molding compound | Self-extinguishing epoxy housing prevents flame propagation in fault conditions - required for safety-critical enclosures and power distribution units. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bi-directional voltage clamp placed directly at connector entry point to shunt transients before reaching MCU or signal conditioner. Use Value: Maintains signal integrity below 207 V clamping threshold while surviving 400 W surges - avoids reset or latch-up in AEC-Q100 Grade 2 systems. |
Use Scenario: Safeguarding 24 V DC digital input modules against inductive kickback from solenoid valves and relay coils. IC Role / Device Role / Timing Role: Primary overvoltage limiter on field-side input traces, coordinated with series current-limiting resistor and optocoupler isolation. Use Value: Enables >100,000 surge cycles at rated energy due to low incremental surge resistance - extends maintenance intervals in factory automation. |
| Telecom Line Interface | Power Supply Input Stage |
Use Scenario: Secondary protection on POTS or xDSL line cards upstream of integrated line drivers and SLICs. IC Role / Device Role / Timing Role: Fast-response clamping element absorbing induced lightning surges (IEC 61000-4-5) before reaching front-end amplifiers. Use Value: Sub-1 ns response time and symmetrical clamping ensure balanced differential-mode suppression - preserves signal fidelity in voice-band applications. |
Use Scenario: Input-stage transient suppression on AC/DC adapters and DC/DC converter front ends exposed to mains-borne surges. IC Role / Device Role / Timing Role: First-line defense parallel to bulk capacitor, limiting voltage overshoot during line switching or brownout recovery. Use Value: 128 V VWM aligns with 115 VAC RMS + tolerance; 207 V VC stays below 250 V insulation ratings - avoids capacitor overvoltage failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ130A | Uni-directional; 130 V VBR min, 200 V VC @ 2.0 A; SMB package (surface-mount) | Requires polarity-aware layout; unsuitable for AC or floating differential lines without external biasing. | Select when board space is constrained and circuit topology permits uni-directional protection with ground-referenced clamping. |
| P6KE130A | Uni-directional; 130 V VBR min, 219 V VC @ 1.8 A; DO-15 package; lower PPPM (600 W but 1.5× longer 10/1000 μs tail) | Larger footprint than DO-41; higher clamping voltage reduces margin for 3.3 V/5 V logic protection. | Choose for legacy through-hole designs where DO-15 is already standardized and AEC-Q101 is not required. |
Compared with SMBJ130A and P6KE130A, BZW04P128HE3/73 offers bi-directional symmetry in a compact DO-41 form factor with AEC-Q101 validation - making it uniquely suited for automotive and industrial applications requiring polarity-agnostic, high-reliability surge suppression without redesigning layout or qualification plans.
Availability
BZW04P128HE3/73 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line protection requiring stable component supply, long-lifecycle support, and AEC-Q101 compliance.
Supply support for BZW04P128HE3/73 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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The BZW04P series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial control, and telecommunications infrastructure where AEC-Q101 qualification and consistent clamping performance are mandatory.
FAQ
What is the clamping voltage of BZW04P128HE3/73 and how is it measured?
The clamping voltage (VC) of BZW04P128HE3/73 is 207 V, measured at a peak pulse current (IPPM) of 2.0 A using the standard 10/1000 μs double-exponential waveform per IEC 61000-4-5. This value reflects the maximum voltage seen across the device during surge conduction and is critical for ensuring downstream components remain within their absolute maximum ratings. The BZW04P128HE3/73 maintains this clamping performance symmetrically in both directions due to its bi-directional construction.
Is BZW04P128HE3/73 suitable for automotive applications?
Yes, BZW04P128HE3/73 is AEC-Q101 qualified and specifically designed for automotive use, including engine control units, body electronics, and sensor interfaces exposed to load dump, jump start, and ISO 7637-2 transients. Its -55 °C to +175 °C operating range, DO-204AL mechanical robustness, and RoHS-compliant, whisker-tested leads meet stringent automotive manufacturing and reliability requirements. The BZW04P128HE3/73 is referenced in Vishay's automotive-grade TVS portfolio documentation.
How does the bi-directional nature of BZW04P128HE3/73 affect its circuit implementation?
The bi-directional design of BZW04P128HE3/73 eliminates polarity constraints - both terminals are functionally identical, and no cathode marking is present. This allows direct placement across floating or AC-coupled signal lines (e.g., RS-485, CAN, audio) without concern for orientation, reducing assembly errors and enabling simplified PCB routing. Unlike uni-directional TVS diodes, the BZW04P128HE3/73 provides symmetrical clamping in either direction, essential for protecting bidirectional data buses or transformer-coupled interfaces.
What is the maximum junction temperature rating for BZW04P128HE3/73?
The maximum junction temperature (TJ max.) for BZW04P128HE3/73 is +175 °C, as specified in the Vishay datasheet Document Number 88316. This rating enables reliable operation in high-temperature environments such as under-hood automotive electronics, industrial motor drives, and enclosed power supplies. Derating curves in Figure 2 of the datasheet confirm usable power dissipation down to ambient temperatures up to 125 °C when mounted on standard PCB copper areas - a key advantage of the BZW04P128HE3/73 over lower-TJ alternatives.
Does BZW04P128HE3/73 have any certifications beyond AEC-Q101?
Yes, BZW04P128HE3/73 is RoHS-compliant per Directive 2011/65/EU and meets UL 94 V-0 flammability requirements for its epoxy molding compound. It also passes JESD201 Class 2 whisker testing, confirming resistance to tin whisker growth under thermal-humidity stress - critical for aerospace, medical, and long-life industrial deployments. These certifications are documented in the Vishay BZW04P-5V8 thru BZW04-376 datasheet and supported by Vishay's material declarations. The BZW04P128HE3/73 carries the HE3 suffix denoting AEC-Q101 qualification and Class 2 whisker compliance.
BZW04P128HE3/73 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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 128V
- Voltage - Breakdown (Min):
- 143V
- Voltage - Clamping (Max) @ Ipp:
- 207V
- Current - Peak Pulse (10/1000µs):
- 2A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
BZW04P128HE3/73 FAQ
1.How can I place an order for BZW04P128HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04P128HE3/73 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 BZW04P128HE3/73 reliable?
The price and inventory of BZW04P128HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW04P128HE3/73 is usually 5 days.
3.What payment methods are accepted for BZW04P128HE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04P128HE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04P128HE3/73?
BZW04P128HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04P128HE3/73 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 BZW04P128HE3/73?
For technical support, including BZW04P128HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04P128HE3/73 requirements.
6.How does Aetrix verify that BZW04P128HE3/73 is sourced from the original manufacturer or authorized distributors?
All BZW04P128HE3/73 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 BZW04P128HE3/73 meets industry standards.
7.What is the process for return or replacement of BZW04P128HE3/73?
All BZW04P128HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with BZW04P128HE3/73, 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 BZW04P128HE3/73 part is unused and in its original packaging.
Return procedure for BZW04P128HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZW04P128HE3/73 Tags
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