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Vishay General Semiconductor - Diodes Division SMCJ70AHE3/57T
- Part No.:
- SMCJ70AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ70AHE3/57T.pdf
- Description:
- TVS DIODE 70VWM 113VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,285
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Product details
Overview
SMCJ70AHE3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients up to 113 V at 13.3 A peak pulse current, with 70 V stand-off voltage and 1500 W peak pulse power rating. It protects MOSFETs, ICs, and sensor signal lines in automotive and industrial power electronics.
For engineers reviewing the SMCJ70AHE3/57T datasheet, SMCJ70AHE3/57T pinout, SMCJ70AHE3/57T application, or SMCJ70AHE3/57T equivalent, key selection criteria include clamping voltage (VC = 113 V), breakdown voltage range (77.8–86.0 V), AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), and SMC package compatibility with automated placement.
Technical Context
This TVS diode operates as a unidirectional clamping device with a cathode-band polarity marking, leveraging glass-passivated junction technology for stable avalanche response. Its 10/1000 μs waveform surge capability and low incremental surge resistance enable robust protection against inductive switching spikes and ESD events.
The device features a maximum reverse leakage of 1.0 μA at 70 V stand-off voltage, temperature coefficient of VBR = 0.105 %/°C, and junction-to-ambient thermal resistance of 75 °C/W on standard 8.0 mm × 8.0 mm copper pads - critical for thermal design in high-reliability PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 70 V - Maximum continuous reverse operating voltage before clamping begins |
| Breakdown Voltage (VBR) | 77.8–86.0 V at 1.0 mA - Confirmed avalanche initiation range under standardized test conditions |
| Clamping Voltage (VC) | 113 V at 13.3 A IPPM - Peak voltage seen by protected circuit during 10/1000 μs transient |
| Peak Pulse Power (PPPM) | 1500 W - Sustained transient energy absorption capability per single event |
| Peak Pulse Current (IPPM) | 13.3 A - Maximum surge current supported with 10/1000 μs waveform |
| Junction Temperature Range | −55 °C to +150 °C - Validated operating envelope for automotive under-hood and industrial environments |
| AEC-Q101 Qualified | Yes - Certified for automotive-grade reliability per stress test requirements |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode identified by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when V > VBR |
| Anode | Reference/ground return | Typically tied to system ground plane; completes clamping path during overvoltage event |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS sensor interfaces |
| Low incremental surge resistance | Enables tighter clamping voltage margin and reduced overshoot during fast transients |
| Glass passivated chip junction | Ensures long-term stability of breakdown characteristics and resistance to humidity/moisture ingress |
| MSL Level 1 (J-STD-020) | Allows unlimited floor life and reflow compatibility up to 260 °C peak without preconditioning |
| RoHS-compliant & halogen-free option available | Meets environmental compliance requirements for global industrial and automotive supply chains |
Applications
| Automotive Power Distribution | Industrial Motor Drive Inputs |
|---|---|
Use Scenario: Protection of 12 V/24 V battery-fed ECUs against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed across power rail to clamp positive-going transients before they reach downstream regulators and microcontrollers. Use Value: Limits voltage excursion to ≤113 V during 13.3 A surge, preventing latch-up or permanent damage to 3.3 V/5 V logic circuits. |
Use Scenario: Input stage safeguard for variable-frequency drives exposed to inductive kickback from contactor switching. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between phase input and chassis ground to absorb repetitive switching surges. Use Value: Withstands ≥1000 W pulses without degradation, maintaining 70 V hold-off during normal operation and rapid response (<1 ns) to edge-triggered transients. |
| Automotive Sensor Signal Lines | Industrial PLC Digital I/O Modules |
Use Scenario: CAN/LIN bus line protection in radar and camera modules subject to ISO 7637-2 pulse 5a/b. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS placed inline with signal trace to suppress ESD and coupled noise. Use Value: Clamps transients while preserving signal integrity - verified 1.0 μA leakage at 70 V ensures minimal DC loading on 5 V sensor references. |
Use Scenario: 24 V digital input protection in programmable logic controllers interfacing with field switches and solenoids. IC Role / Device Role / Timing Role: Rail-to-rail clamping device mounted at connector entry point to divert surge energy away from optocoupler inputs. Use Value: 1500 W rating handles worst-case inductive switch-off events; SMC package enables compact layout adjacent to I/O header without compromising creepage/clearance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ70A-E3/57T | Lower PPPM (400 W), smaller SMA package, same VWM/VBR range | Limited to lower-energy transients; unsuitable for load dump or high-current inductive spikes | Select only when board space is constrained and surge energy is <400 W |
| SMCJ70CAHE3/57T | Bidirectional variant; symmetric clamping in both polarities; same VC (113 V) and PPPM (1500 W) | Required for AC-coupled or floating signal lines where negative transients occur (e.g., RS-485, transformer-isolated interfaces) | Choose bidirectional version only if dual-polarity protection is mandated by system architecture |
Compared with SMAJ70A-E3/57T and SMCJ70CAHE3/57T, the SMCJ70AHE3/57T delivers optimal balance of high-energy clamping (1500 W), automotive qualification, and unidirectional efficiency - making it the preferred choice for DC power rail protection where polarity is fixed and surge magnitude exceeds 400 W.
Availability
SMCJ70AHE3/57T is available at Aetrix Electronics and suitable for automotive ECUs, industrial motor drives, sensor interface modules, and PLC I/O systems requiring stable component supply with full AEC-Q101 traceability and RoHS compliance.
Supply support for SMCJ70AHE3/57T 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, precision, and automotive-grade validation.
The SMCJ series targets high-energy transient suppression in harsh environments, engineered specifically for automotive power distribution, industrial automation, and telecom infrastructure where sustained 1500 W surge handling and AEC-Q101 compliance are mandatory.
FAQ
What is the clamping voltage of SMCJ70AHE3/57T at its rated peak pulse current?
The SMCJ70AHE3/57T has a maximum clamping voltage (VC) of 113 V when subjected to its rated peak pulse current (IPPM) of 13.3 A under the standard 10/1000 μs waveform. This value is measured per JEDEC test conditions and defines the upper voltage limit imposed on protected circuitry during transient events. The SMCJ70AHE3/57T maintains this clamping performance across its qualified temperature range of −55 °C to +150 °C.
Is SMCJ70AHE3/57T qualified for automotive applications?
Yes, the SMCJ70AHE3/57T carries AEC-Q101 qualification, confirmed in Vishay's official documentation and ordering code suffix "HE3". This certification covers stress tests including high-temperature operating life, temperature cycling, and ESD robustness - validating its suitability for under-hood and chassis-mounted automotive electronics such as body control modules and ADAS power supplies. The SMCJ70AHE3/57T meets all requirements for Grade 1 and Grade 2 automotive ambient temperature profiles.
What does the "HE3" suffix indicate in SMCJ70AHE3/57T?
The "HE3" suffix in SMCJ70AHE3/57T denotes RoHS-compliant construction with AEC-Q101 qualification, distinguishing it from commercial-grade "E3" variants. It confirms compliance with automotive reliability standards, halogen-free materials per IEC 61249-2-21, and whisker resistance per JESD 201 Class 2. The SMCJ70AHE3/57T is not interchangeable with non-HE3 versions in automotive designs unless re-qualified, as the HE3 grade undergoes additional screening and lot-level testing required by OEM specifications.
How does SMCJ70AHE3/57T differ from bidirectional SMCJ70CAHE3/57T?
The SMCJ70AHE3/57T is unidirectional and clamps only positive transients relative to its cathode, whereas the SMCJ70CAHE3/57T provides symmetrical clamping for both polarities. Both share identical peak pulse power (1500 W), clamping voltage (113 V), and package (SMC), but the unidirectional SMCJ70AHE3/57T offers lower leakage (1.0 μA vs. 2.0 μA for CA version at VWM) and is preferred for DC power rails. The SMCJ70AHE3/57T must be oriented with cathode toward the protected line, unlike the CA variant which has no polarity marking.
What is the thermal resistance of SMCJ70AHE3/57T, and how does it affect PCB layout?
The SMCJ70AHE3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal, as specified in the Vishay datasheet. This value directly impacts safe power dissipation: at 6.5 W steady-state, junction temperature rise reaches ~488 °C above ambient - confirming that the device is intended for transient-only duty, not continuous conduction. For reliable operation, PCB layout must adhere to the recommended pad dimensions and avoid excessive thermal isolation; the SMCJ70AHE3/57T is not rated for DC power dissipation.
SMCJ70AHE3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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):
- 13.3A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ70AHE3/57T FAQ
1.How can I place an order for SMCJ70AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ70AHE3/57T 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 SMCJ70AHE3/57T reliable?
The price and inventory of SMCJ70AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ70AHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ70AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ70AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ70AHE3/57T?
SMCJ70AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ70AHE3/57T 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 SMCJ70AHE3/57T?
For technical support, including SMCJ70AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ70AHE3/57T requirements.
6.How does Aetrix verify that SMCJ70AHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ70AHE3/57T 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 SMCJ70AHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ70AHE3/57T?
All SMCJ70AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ70AHE3/57T, 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 SMCJ70AHE3/57T part is unused and in its original packaging.
Return procedure for SMCJ70AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ70AHE3/57T Tags
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