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Vishay General Semiconductor - Diodes Division SMBJ70AHM3_A/H
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- Part No.:
- SMBJ70AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ70AHM3_A/H.pdf
- Description:
- TVS DIODE 70VWM 113VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,587
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Product details
Overview
SMBJ70AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 70 V stand-off voltage (VWM), 77.8–86.0 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), 5.3 A peak pulse current (IPPM), and clamps to ≤113 V at IPPM. It protects MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the SMBJ70AHM3_A/H datasheet, SMBJ70AHM3_A/H pinout, SMBJ70AHM3_A/H application, or SMBJ70AHM3_A/H equivalent, this part delivers verified unidirectional surge suppression with AEC-Q101 qualification, halogen-free RoHS compliance, and MSL Level 1 moisture sensitivity - critical for automotive-grade board-level ESD and load-dump protection design.
Technical Context
This TVS diode operates as a voltage-clamping device in reverse-biased configuration, triggering when transient voltage exceeds its VBR threshold and limiting downstream voltage to ≤113 V under 600 W 10/1000 µs surge. Its glass-passivated junction ensures stable leakage (<1.0 µA at 70 V) and fast response time (<1.0 ns).
Thermal performance is defined by RθJA = 100 °C/W (on 0.2" × 0.2" copper pads) and TJmax = +150 °C, supporting operation in high-temperature industrial and automotive environments. The HM3 suffix confirms halogen-free, RoHS-compliant construction and AEC-Q101 qualification per ordering code convention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 70 V - Maximum continuous reverse operating voltage before clamping begins; sets safe margin below system rail. |
| VBR (Breakdown Voltage) | 77.8–86.0 V at 1 mA - Confirmed minimum/maximum threshold where avalanche conduction initiates reliably. |
| VC (Clamping Voltage) | ≤113 V at 5.3 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge event. |
| PPPM (Peak Pulse Power) | 600 W - Sustained transient energy handling capability under standardized 10/1000 µs waveform. |
| IPPM (Peak Pulse Current) | 5.3 A - Maximum surge current the device safely shunts without degradation. |
| TJmax | +150 °C - Enables use in under-hood automotive and high-ambient industrial applications. |
| Leakage (ID) | ≤1.0 µA at 70 V - Negligible standby power loss and minimal impact on high-impedance sensor bias networks. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by band marking; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts surge current to ground when VWM exceeded. |
| Anode (unbanded end) | Reference/return path | Typically tied to system ground or low-impedance return plane; completes clamping path. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 24 V systems. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive electronics including body control modules and powertrain sensors. |
| Halogen-free & RoHS-compliant | Meets EU ELV and JEDEC J-STD-203 requirements for green manufacturing and end-of-life processing. |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free SMT assembly without pre-baking or special handling. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., inductive switch-off in motor drives). |
Applications
| Automotive Body Control Module | Industrial PLC Digital Input |
|---|---|
|
Use Scenario: Protecting microcontroller GPIOs and CAN transceiver power rails from load-dump and jump-start transients in vehicle door modules. IC Role / Device Role / Timing Role: Unidirectional clamping diode placed between 12 V supply and ground, triggered within <1 ns to limit voltage to ≤113 V. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V logic ICs during 35 V/100 ms load-dump events per ISO 7637-2. |
Use Scenario: Safeguarding 24 V DC digital input circuits in programmable logic controllers exposed to relay coil flyback and field wiring ESD. IC Role / Device Role / Timing Role: Standoff-rated TVS connected across input terminals to clamp induced spikes before they reach optocoupler input stage. Use Value: Maintains signal integrity and extends optocoupler lifetime by limiting reverse voltage stress to <113 V during 600 W surges. |
| Telecom Power Supply Front-End | Consumer Appliance Motor Driver |
|
Use Scenario: Secondary-side overvoltage protection on 48 V telecom rectifier outputs subjected to lightning-induced surges on distribution lines. IC Role / Device Role / Timing Role: Unidirectional TVS placed between output rail and chassis ground to absorb differential-mode transients. Use Value: Ensures compliance with ITU-T K.20 immunity requirements by clamping 10/1000 µs surges to safe levels for downstream DC/DC converters. |
Use Scenario: Suppressing back-EMF spikes from brushed DC motors in washing machines and HVAC blowers connected to MCU-driven H-bridge drivers. IC Role / Device Role / Timing Role: Mounted across motor terminals to divert inductive kickback away from gate drivers and sense resistors. Use Value: Eliminates false overcurrent trips and prevents MOSFET avalanche failure during frequent motor commutation cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ70AHE3_A/H | Same electrical specs, but RoHS-compliant without halogen-free certification; no AEC-Q101 qualification. | Limited to commercial-grade industrial and consumer applications; not approved for automotive use. | Select when halogen-free content and automotive qualification are not required; lower cost alternative. |
| SMCJ70A-HF | Higher 1500 W PPPM, larger SMC (DO-214AB) package, same VWM/VC ratings. | Better suited for higher-energy surges (e.g., AC mains coupling); requires larger PCB footprint. | Choose when system-level surge testing exceeds 600 W or layout allows larger package. |
Compared with SMBJ70AHM3_A/H, SMBJ70AHE3_A/H sacrifices automotive qualification and halogen-free status for cost savings, while SMCJ70A-HF trades compact SMB size for 2.5× higher surge capacity - making SMBJ70AHM3_A/H optimal for space-constrained AEC-Q101 designs needing precise 600 W protection.
Availability
SMBJ70AHM3_A/H is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC inputs, telecom power front-ends, and appliance motor control requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ70AHM3_A/H 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive-grade validation.
The SMBJ series is engineered for board-level transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where consistent clamping performance and AEC-Q101 compliance are mandatory.
FAQ
What is the clamping voltage of SMBJ70AHM3_A/H at its rated peak pulse current?
The SMBJ70AHM3_A/H clamps to a maximum of 113 V when subjected to its specified peak pulse current of 5.3 A under the 10/1000 µs waveform. This value is measured and guaranteed per Vishay's datasheet (Document Number: 88392, Rev. 09-Jan-2024), ensuring predictable overvoltage protection for downstream 75 V-rated components. The SMBJ70AHM3_A/H maintains this clamping performance across its full operating temperature range.
Is SMBJ70AHM3_A/H suitable for automotive applications?
Yes, SMBJ70AHM3_A/H is AEC-Q101 qualified, as confirmed by the "HM3" suffix in its ordering code and documented in Vishay's official datasheet. It meets automotive reliability requirements for temperature cycling, humidity, and surge endurance. The SMBJ70AHM3_A/H is explicitly recommended for body control modules, sensor interfaces, and power distribution units in passenger vehicles and commercial vehicles.
What does the "HM3" suffix indicate in SMBJ70AHM3_A/H?
The "HM3" suffix in SMBJ70AHM3_A/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. Per Vishay's ordering information table, HM3 parts meet JESD201 Class 2 whisker resistance and MSL Level 1 reflow compatibility (260 °C peak). This distinguishes SMBJ70AHM3_A/H from E3 (RoHS only) and HE3 (AEC-Q101 + RoHS, non-halogen-free) variants.
How does SMBJ70AHM3_A/H compare to bidirectional TVS diodes like SMBJ70CA?
SMBJ70AHM3_A/H is unidirectional and intended for DC line protection with polarity-sensitive placement (cathode to rail), whereas SMBJ70CA is bidirectional and used for AC or floating signal lines. The SMBJ70AHM3_A/H offers lower leakage (<1.0 µA vs. up to 2.0 µA for SMBJ70CA) and is optimized for 12 V/24 V automotive rails. It cannot replace SMBJ70CA in AC-coupled or symmetric surge scenarios.
What is the thermal resistance of SMBJ70AHM3_A/H, and how does it affect PCB layout?
The SMBJ70AHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain TJ ≤ 150 °C under sustained 5.0 W dissipation, designers must ensure adequate copper area and avoid thermal bottlenecks. The SMBJ70AHM3_A/H datasheet specifies this pad layout as minimum; doubling pad size reduces RθJA by ~20 %.
SMBJ70AHM3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 70V
- Voltage - Breakdown (Min):
- 77.8V
- Voltage - Clamping (Max) @ Ipp:
- 113V
- Current - Peak Pulse (10/1000µs):
- 5.3A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ70AHM3_A/H FAQ
1.How can I place an order for SMBJ70AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ70AHM3_A/H 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 SMBJ70AHM3_A/H reliable?
The price and inventory of SMBJ70AHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ70AHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ70AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ70AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ70AHM3_A/H?
SMBJ70AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ70AHM3_A/H 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 SMBJ70AHM3_A/H?
For technical support, including SMBJ70AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ70AHM3_A/H requirements.
6.How does Aetrix verify that SMBJ70AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ70AHM3_A/H 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 SMBJ70AHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ70AHM3_A/H?
All SMBJ70AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ70AHM3_A/H, 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 SMBJ70AHM3_A/H part is unused and in its original packaging.
Return procedure for SMBJ70AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ70AHM3_A/H Tags
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