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Vishay General Semiconductor - Diodes Division BZW04P70B-E3/73
- Part No.:
- BZW04P70B-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04P70B-E3/73.pdf
- Description:
- TVS DIODE 70.1VWM 113VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:8,916
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Product details
Overview
BZW04P70B-E3/73 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 70.1 V stand-off voltage (VWM), 113 V maximum clamping voltage (VC) at 3.5 A peak pulse current (IPPM), and 400 W peak pulse power (10/1000 µs waveform), making it suitable for protecting MOSFETs, sensor interfaces, and industrial control inputs against inductive switching transients.
For engineers reviewing the BZW04P70B-E3/73 datasheet, BZW04P70B-E3/73 pinout, BZW04P70B-E3/73 application, or BZW04P70B-E3/73 equivalent, key selection criteria include its DO-204AL (DO-41) axial package, bi-directional symmetry, AEC-Q101 qualification, RoHS-compliant matte tin plating, and verified clamping performance under repetitive 0.01% duty cycle surges.
Technical Context
This bi-directional TVS operates symmetrically in both polarities, with identical breakdown (77.9–90.2 V), clamping (113 V), and leakage (<1 µA at VWM) characteristics in forward and reverse directions. Its glass-passivated junction ensures stable avalanche behavior and low incremental surge resistance across temperature.
Designed for transient suppression per ANSI/IEEE C62.35, it delivers 400 W peak pulse power with 10/1000 µs waveform compliance, derated linearly above 25 °C ambient per Fig. 2, and supports soldering up to 275 °C for 10 s (JESD 22-B106). Junction temperature range is –55 °C to +175 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70.1 V - Maximum continuous working voltage before conduction; defines safe operating margin for 48 V nominal systems. |
| VC @ IPPM | 113 V - Clamped voltage at 3.5 A peak pulse; limits downstream IC stress during 10/1000 µs transients. |
| PPPM | 400 W - Peak pulse power handling (10/1000 µs); enables protection against high-energy inductive kickback. |
| IPPM | 3.5 A - Peak pulse current capacity; validated for repetitive 0.01% duty cycle surges without degradation. |
| TJ max | +175 °C - Maximum junction temperature; supports operation in under-hood automotive and industrial environments. |
| Package | DO-204AL (DO-41) - Axial-leaded, UL 94 V-0 molded epoxy package; compatible with through-hole wave soldering. |
| AEC-Q101 | Qualified - Certified for automotive-grade reliability including temperature cycling, HTRB, and ESD testing. |
Pinout & Package
DO-204AL (DO-41) axial package with unmarked leads; bi-directional symmetry means no polarity identification required. Leads are matte tin plated, solderable per J-STD-002 and JESD22-B102, and meet JESD201 Class 1A whisker test (E3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bi-directional avalanche terminals | Either lead functions identically as input or return path; no cathode band marking required. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures consistent avalanche breakdown and long-term stability under repeated surge stress. |
| 400 W peak pulse power (10/1000 µs) | Handles high-energy transients from relay coils, solenoids, and motor commutation without failure. |
| AEC-Q101 qualification | Validates reliability for automotive body electronics, infotainment power rails, and ADAS sensor interfaces. |
| Low clamping ratio (VC/VBR ≈ 1.25) | Minimizes protected circuit overvoltage exposure while maintaining fast response (<1 ns typical). |
| RoHS-compliant & WEEE-aligned | Meets EU environmental directives; E3 suffix confirms JESD201 Class 1A whisker resistance. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting microcontroller GPIOs and CAN transceiver power rails from load dump and alternator ripple in 12 V/24 V vehicle subsystems. IC Role / Device Role / Timing Role: Bi-directional voltage clamp placed between supply rail and ground, responding within nanoseconds to transients exceeding 70.1 V. Use Value: Prevents latch-up or permanent damage to 5 V/3.3 V logic ICs by limiting surge voltage to ≤113 V during ISO 7637-2 Pulse 1/2a events. |
Use Scenario: Safeguarding 24 V DC digital input channels of programmable logic controllers against field-wiring induced surges and relay contact bounce. IC Role / Device Role / Timing Role: Primary overvoltage clamp on dry-contact interface, mounted directly at terminal block entry point. Use Value: Enables >100,000 actuation cycles without degradation, meeting IEC 61000-4-4 Level 4 (2 kV) immunity requirements. |
| Telecom Power Supply Monitoring | Consumer Appliance Motor Driver Protection |
Use Scenario: Shielding voltage supervisor ICs and ADC reference inputs in AC/DC power supplies from line-induced spikes and lightning-induced coupling. IC Role / Device Role / Timing Role: Secondary-level transient suppressor on 5 V bias rail feeding precision monitoring circuitry. Use Value: Maintains measurement accuracy by preventing false resets or erroneous fault flags caused by sub-microsecond overvoltage excursions. |
Use Scenario: Protecting gate drivers and bootstrap capacitors in BLDC motor inverters from shoot-through-induced voltage spikes during commutation. IC Role / Device Role / Timing Role: Fast-clamping device across half-bridge supply rails (e.g., between VCC and GND of driver IC). Use Value: Reduces risk of MOSFET avalanche failure by clamping transient overshoot to 113 V before gate oxide breakdown occurs. |
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 package (surface-mount); lower IPPM (32.1 A vs. 3.5 A) due to higher power rating (600 W). | Requires PCB rework for SMT layout; better suited for high-density consumer boards than through-hole industrial modules. | Select SMBJ70CA only if board space constraints prohibit axial DO-41 and thermal management supports SMT mounting. |
| P6KE70CA | Same DO-204AC (DO-15) package; identical VWM/VC specs but lower PPPM (600 W vs. 400 W) and higher IPPM (34.7 A) - reflects different test waveform (10/1000 µs same, but legacy rating basis). | Legacy industrial stock; lacks AEC-Q101 qualification and JESD201 whisker testing. | Choose P6KE70CA only for cost-sensitive non-automotive applications where qualification documentation is not required. |
Compared with SMBJ70CA and P6KE70CA, BZW04P70B-E3/73 offers AEC-Q101 validation, DO-41 mechanical robustness for vibration-prone environments, and guaranteed 400 W pulse handling with documented 0.01% duty cycle endurance - critical for automotive and industrial field deployments.
Availability
BZW04P70B-E3/73 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input stages, and telecom power monitoring circuits requiring stable component supply with full traceability and long-lifecycle support.
Supply support for BZW04P70B-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, and passive components for automotive, industrial, and computing markets.
The BZW04P70B-E3/73 belongs to the TransZorb® family of TVS diodes engineered specifically for bi-directional transient suppression in harsh environments, with emphasis on AEC-Q101 compliance and repeatable clamping performance.
FAQ
What is the maximum clamping voltage of the BZW04P70B-E3/73 under standard test conditions?
The BZW04P70B-E3/73 has a maximum clamping voltage (VC) of 113 V when subjected to its rated peak pulse current of 3.5 A using the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that downstream circuitry will not experience voltages exceeding 113 V during specified transient events, ensuring reliable protection for 70 V-class systems.
Is the BZW04P70B-E3/73 suitable for automotive applications?
Yes, the BZW04P70B-E3/73 is AEC-Q101 qualified and explicitly rated for automotive use. Its construction - including glass-passivated junction, DO-204AL package with matte tin leads, and operation from –55 °C to +175 °C - meets stringent automotive reliability requirements. It is commonly deployed in body control modules, sensor interfaces, and power distribution units where ISO 7637-2 compliance is mandatory.
Does the BZW04P70B-E3/73 have polarity markings?
No, the BZW04P70B-E3/73 is a bi-directional TVS diode and carries no polarity marking. Its DO-204AL (DO-41) package has unmarked, symmetrical leads - either terminal functions identically as anode or cathode depending on instantaneous voltage polarity. This eliminates orientation errors during manual or automated through-hole assembly.
What is the standoff voltage (VWM) of the BZW04P70B-E3/73, and how does it relate to system design?
The BZW04P70B-E3/73 has a standoff voltage (VWM) of 70.1 V, meaning it remains non-conductive up to this DC or RMS voltage level. In system design, VWM must exceed the maximum normal operating voltage - e.g., for a 48 V nominal bus, 70.1 V provides ~46% margin - ensuring no leakage or power loss during steady-state operation while enabling rapid clamping above threshold.
Can the BZW04P70B-E3/73 be used in place of a unidirectional TVS like BZW04P70-E3/73?
No - the BZW04P70B-E3/73 is strictly bi-directional and cannot replace a unidirectional part (e.g., BZW04P70-E3/73) in circuits requiring DC blocking or polarity-specific clamping. Unidirectional types feature a cathode band and conduct only in reverse bias; substituting the bi-directional BZW04P70B-E3/73 would allow conduction during normal forward-biased operation, potentially disrupting circuit functionality.
BZW04P70B-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:
- Obsolete
- 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)
BZW04P70B-E3/73 FAQ
1.How can I place an order for BZW04P70B-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04P70B-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 BZW04P70B-E3/73 reliable?
The price and inventory of BZW04P70B-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 BZW04P70B-E3/73 is usually 5 days.
3.What payment methods are accepted for BZW04P70B-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04P70B-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04P70B-E3/73?
BZW04P70B-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04P70B-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 BZW04P70B-E3/73?
For technical support, including BZW04P70B-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04P70B-E3/73 requirements.
6.How does Aetrix verify that BZW04P70B-E3/73 is sourced from the original manufacturer or authorized distributors?
All BZW04P70B-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 BZW04P70B-E3/73 meets industry standards.
7.What is the process for return or replacement of BZW04P70B-E3/73?
All BZW04P70B-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with BZW04P70B-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 BZW04P70B-E3/73 part is unused and in its original packaging.
Return procedure for BZW04P70B-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZW04P70B-E3/73 Tags
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