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Vishay General Semiconductor - Diodes Division BZW04-70B-E3/73
- Part No.:
- BZW04-70B-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04-70B-E3/73.pdf
- Description:
- TVS DIODE 70.1VWM 113VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:6,539
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Product details
Overview
BZW04-70B-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 a 70.1 V stand-off voltage (VWM), 77.9–86.1 V breakdown voltage (VBR) at 1 mA test current, and clamps to ≤113 V at 3.5 A peak pulse current (IPPM) under 10/1000 μs waveform - suitable for protecting automotive sensor interfaces and industrial I/O circuits.
For engineers reviewing the BZW04-70B-E3/73 datasheet, BZW04-70B-E3/73 pinout, BZW04-70B-E3/73 application, or BZW04-70B-E3/73 equivalent, this device serves as a robust, AEC-Q101-qualified transient protector for bidirectional AC-coupled or floating signal paths where polarity-agnostic surge suppression is required without rectification.
Technical Context
This TVS diode uses a glass-passivated silicon junction optimized for fast response (<1 ns) and low incremental surge resistance, enabling effective clamping of ESD, lightning-induced surges, and inductive switching spikes. Its bidirectional symmetry ensures identical clamping behavior in both polarities, eliminating need for orientation during PCB placement.
The device operates across –55 °C to +175 °C junction temperature range and maintains stable VBR temperature coefficient of 0.105 %/°C. It delivers 400 W peak pulse power (10/1000 μs) with 1.0 μA max reverse leakage at VWM, supporting high-reliability protection in automotive and industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70.1 V - maximum continuous working voltage before conduction begins; defines safe operating margin for 70 V nominal systems. |
| VBR min/max | 77.9 V / 86.1 V at 1 mA - guaranteed breakdown window ensures predictable turn-on across process and temperature. |
| VC @ IPPM | ≤113 V at 3.5 A - clamping voltage limits downstream component stress during 10/1000 μs transients. |
| PPPM | 400 W - peak pulse power rating determines survivability against standardized surge waveforms. |
| ID @ VWM | ≤1.0 μA - ultra-low leakage preserves signal integrity and minimizes standby power loss. |
| TJ max | +175 °C - extended thermal rating supports under-hood automotive and high-ambient industrial use. |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing. |
Pinout & Package
DO-41 (DO-204AL) axial-leaded package with matte tin-plated leads; no polarity marking - symmetric bidirectional construction eliminates cathode/anode identification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (interchangeable) | Transient conduction path | Identical electrical behavior in both directions; either lead may connect to protected line or ground reference. |
| Case (body) | Mechanical mounting / thermal path | Epoxy-molded body provides UL 94 V-0 flammability rating and mechanical robustness; minimal thermal resistance to ambient. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable long-term leakage performance and resistance to humidity-induced degradation in harsh environments. |
| 400 W peak pulse power (10/1000 μs) | Supports IEC 61000-4-5 Level 4 surge immunity (4 kV line-to-earth) in properly designed circuits. |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, chassis, and ADAS subsystems requiring zero-failure field reliability. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage exposure to protected ICs - critical for 3.3 V or 5 V logic interfacing with higher-voltage domains. |
| Solder dip rated 275 °C for 10 s | Ensures compatibility with standard wave and reflow soldering processes without parametric shift or bond degradation. |
Applications
| Automotive Sensor Protection | Industrial PLC Analog Input |
|---|---|
Use Scenario: Protecting CAN bus transceivers and LIN nodes from load dump and ESD events in vehicle body control modules. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential signal pair or supply rail to shunt transients before reaching interface IC. Use Value: Prevents latch-up or permanent damage to transceivers during ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-2 ESD events. |
Use Scenario: Safeguarding 4–20 mA current loop inputs in programmable logic controllers exposed to field wiring surges. IC Role / Device Role / Timing Role: Standoff-connected TVS limiting voltage excursion across input protection circuitry during induced transients. Use Value: Maintains analog accuracy by limiting input overvoltage to <113 V while drawing <1 μA at 70 V DC operating point. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Shielding RS-485 transceivers in building automation gateways from lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Bidirectional clamp between A/B lines and ground, providing common-mode and differential-mode transient suppression. Use Value: Enables compliance with IEC 61000-4-5 (10/700 μs) up to 2 kV without adding series impedance that degrades signal integrity. |
Use Scenario: Protecting microcontroller GPIOs driving relay coils or triac gates in smart home appliances. IC Role / Device Role / Timing Role: Snubber-style clamp across inductive load to suppress flyback voltage spikes exceeding MCU I/O absolute maximum ratings. Use Value: Eliminates need for external freewheeling diodes while ensuring <113 V clamping prevents 5 V GPIO destruction during 40 A IFSM-rated coil turn-off. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ70CA | Same VWM (70 V), but SMC (DO-214AB) package; 600 W PPPM; higher VC (115 V); 2.5× larger footprint. | Preferred where board space allows and higher surge margin is needed; not drop-in due to different package and thermal profile. | Select SMBJ70CA only if system-level surge testing exceeds 400 W requirements or if DO-41 lead spacing conflicts with layout. |
| P6KE70CA | Legacy 600 W device in DO-15; VWM = 70 V, VC = 118 V; higher leakage (5 μA); no AEC-Q101 qualification. | Suitable for cost-sensitive industrial equipment without automotive qualification mandates; lower reliability assurance. | Choose P6KE70CA only for non-automotive applications where AEC-Q101 is not required and legacy DO-15 footprint is fixed. |
Compared with BZW04-70B-E3/73, SMBJ70CA offers higher surge capacity but requires PCB redesign, while P6KE70CA sacrifices automotive qualification and leakage performance for legacy compatibility - making BZW04-70B-E3/73 the optimal balance of AEC-Q101 compliance, DO-41 fit, and 400 W protection in space-constrained designs.
Availability
BZW04-70B-E3/73 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC analog inputs, telecom line protection, and consumer appliance motor control requiring stable component supply and full traceability.
Supply support for BZW04-70B-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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The BZW04 series is part of Vishay's TRANSZORB® TVS portfolio, engineered specifically for robust, bidirectional transient suppression in demanding environments where AEC-Q101 validation and stable clamping performance are mandatory.
FAQ
What is the polarity configuration of BZW04-70B-E3/73?
BZW04-70B-E3/73 is a bidirectional TVS diode with symmetrical electrical characteristics in both directions. It has no polarity marking on the DO-41 package, and either lead functions identically as anode or cathode depending on instantaneous voltage polarity - enabling simplified placement in AC-coupled or floating signal paths.
Does BZW04-70B-E3/73 meet automotive qualification standards?
Yes, BZW04-70B-E3/73 is AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD per JESD22-A114. This certification confirms its suitability for automotive powertrain, chassis, and body electronics where zero-field-failure reliability is required.
What is the maximum clamping voltage of BZW04-70B-E3/73 under surge conditions?
The maximum clamping voltage (VC) of BZW04-70B-E3/73 is 113 V when subjected to its rated peak pulse current (IPPM) of 3.5 A using the standard 10/1000 μs waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during transient events.
Can BZW04-70B-E3/73 be used in place of unidirectional TVS diodes?
No - BZW04-70B-E3/73 is strictly bidirectional and must not replace unidirectional TVS diodes in DC-biased applications such as power rail protection, where forward conduction would cause short-circuit failure. It is intended only for AC-coupled, floating, or dual-rail signal lines where polarity reversal occurs or must be tolerated.
What is the junction temperature limit for continuous operation of BZW04-70B-E3/73?
The maximum continuous operating junction temperature (TJ max) for BZW04-70B-E3/73 is +175 °C. Derating curves in the Vishay datasheet (Document Number 88316, Fig. 2 and Fig. 5) define allowable power dissipation versus ambient temperature and lead temperature - critical for thermal design in enclosed automotive or industrial enclosures.
BZW04-70B-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):
- 70.1V
- Voltage - Breakdown (Min):
- 77.9V
- Voltage - Clamping (Max) @ Ipp:
- 113V
- Current - Peak Pulse (10/1000µs):
- 3.5A
- 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)
BZW04-70B-E3/73 FAQ
1.How can I place an order for BZW04-70B-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04-70B-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 BZW04-70B-E3/73 reliable?
The price and inventory of BZW04-70B-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 BZW04-70B-E3/73 is usually 5 days.
3.What payment methods are accepted for BZW04-70B-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04-70B-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04-70B-E3/73?
BZW04-70B-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04-70B-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 BZW04-70B-E3/73?
For technical support, including BZW04-70B-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04-70B-E3/73 requirements.
6.How does Aetrix verify that BZW04-70B-E3/73 is sourced from the original manufacturer or authorized distributors?
All BZW04-70B-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 BZW04-70B-E3/73 meets industry standards.
7.What is the process for return or replacement of BZW04-70B-E3/73?
All BZW04-70B-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with BZW04-70B-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 BZW04-70B-E3/73 part is unused and in its original packaging.
Return procedure for BZW04-70B-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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