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Vishay General Semiconductor - Diodes Division SMCJ70AHM3/I
- Part No.:
- SMCJ70AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ70AHM3/I.pdf
- Description:
- TVS DIODE 70VWM 113VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,117
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Product details
Overview
SMCJ70AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, with 70 V stand-off voltage (VWM), 113 V maximum clamping voltage (VC) at 13.3 A peak pulse current (IPPM), and 1500 W peak pulse power rating (PPPM). It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients and lightning surges in automotive and industrial power rails.
For engineers reviewing the SMCJ70AHM3/I datasheet, SMCJ70AHM3/I pinout, SMCJ70AHM3/I application, or SMCJ70AHM3/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, 1500 W surge capability under 10/1000 µs waveform, and halogen-free RoHS-compliant construction per HM3 suffix.
Technical Context
This device operates as a silicon avalanche diode, clamping transient overvoltages above its breakdown voltage (VBR = 77.8–86.0 V at 1 mA) by entering low-impedance conduction while maintaining stable reverse leakage (<1.0 µA at 70 V). Its glass-passivated junction ensures consistent breakdown behavior and long-term reliability under repetitive surge stress.
Designed for surface-mount assembly on standard PCB copper pads (8.0 mm × 8.0 mm per terminal), it meets MSL Level 1 per J-STD-020 with 260 °C peak reflow profile, and features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 77.8 V / 86.0 V at 1 mA - Confirmed breakdown range defining turn-on threshold |
| VC @ IPPM | 113 V at 13.3 A - Clamped voltage during 1500 W 10/1000 µs surge, limiting downstream stress |
| PPPM | 1500 W - Peak transient power handling capacity under standardized surge waveform |
| ID @ VWM | <1.0 µA - Ultra-low leakage ensures minimal standby power loss and signal integrity |
| TJ max | +150 °C - Maximum junction temperature enabling operation in under-hood automotive environments |
| Package | SMC (DO-214AB) - Standardized 2-pin surface-mount outline with 7.75 mm × 6.22 mm footprint |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads; cathode indicated by band marking on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to ground or low-side reference in unidirectional TVS configurations |
| Cathode | Current exit point during clamping | Connected to protected line; band-marked end defines polarity for correct PCB orientation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and surge endurance |
| Halogen-free & RoHS-compliant | HM3 suffix confirms compliance with environmental regulations and material restrictions for global markets |
| Low incremental surge resistance | Enables tight clamping (VC/VBR ratio ≈ 1.46) and efficient energy diversion during fast transients |
| Very fast response time | Sub-nanosecond avalanche turn-on ensures protection before sensitive downstream components are stressed |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and compatibility with standard high-temperature reflow processes up to 260 °C |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs and body control modules from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp positive-going surges above 70 V. Use Value: Withstands 1500 W surges and maintains clamping at 113 V, preventing damage to 36 V-rated DC-DC converters and microcontrollers. | Use Scenario: Shielding analog outputs of pressure/temperature sensors from ESD and cable discharge events in factory automation systems. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS installed at connector interface to shunt transients before reaching ADC input stage. Use Value: Sub-1 µA leakage at 70 V preserves sensor offset accuracy; fast response prevents latch-up in precision front-end amplifiers. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Safeguarding PoE-powered network switches and base stations against induced surges on 48 V DC input lines. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side DC bus, coordinated with upstream fuses and filters. Use Value: 1500 W PPPM rating supports IEC 61000-4-5 Level 4 immunity testing; halogen-free HM3 construction meets telecom flame-safety requirements. | Use Scenario: Suppressing flyback spikes from brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Mounted across motor terminals to absorb inductive kickback during PWM commutation. Use Value: 200 A IFSM rating handles repeated motor startup surges; glass-passivated junction ensures stable clamping over 10,000+ cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ70AHE3/A | Lower PPPM (400 W), SMA package (smaller footprint, lower thermal mass) | Suitable only for lower-energy transients; not rated for automotive AEC-Q101 | Select when space-constrained and surge energy is ≤400 W |
| SMCJ70A-M3/57T | Same electrical specs and SMC package, but M3 suffix denotes halogen-free RoHS without AEC-Q101 qualification | Lacks automotive qualification; acceptable for industrial/commercial use where AEC-Q101 is not mandated | Select when halogen-free compliance is required but automotive qualification is not needed |
Compared with SMCJ70AHM3/I, SMAJ70AHE3/A offers reduced surge capacity and no automotive qualification, while SMCJ70A-M3/57T matches form/fit/function but omits AEC-Q101 validation-making SMCJ70AHM3/I the sole choice for production automotive systems requiring both halogen-free materials and AEC-Q101 compliance.
Availability
SMCJ70AHM3/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom DC power inputs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMCJ70AHM3/I 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, efficiency, and application-specific optimization.
The SMCJ series is designed for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where robustness, AEC-Q101 compliance, and precise clamping performance are critical.
FAQ
What is the clamping voltage of SMCJ70AHM3/I under a 10/1000 µs surge?
The SMCJ70AHM3/I clamps to a maximum of 113 V when subjected to its rated 13.3 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured and guaranteed per Vishay's datasheet Document Number 88394, ensuring predictable overvoltage limiting for downstream circuitry.
Is SMCJ70AHM3/I qualified for automotive applications?
Yes, SMCJ70AHM3/I carries the HM3 suffix, indicating it is halogen-free, RoHS-compliant, and AEC-Q101 qualified. This certification covers stress tests including temperature cycling, high-temperature operating life, and surge endurance-making SMCJ70AHM3/I suitable for under-hood and chassis-mounted automotive electronics.
What does the "I" suffix mean in SMCJ70AHM3/I?
The "I" suffix in SMCJ70AHM3/I specifies the packaging configuration: 13-inch diameter plastic tape and reel, with a base quantity of 3500 units per reel. This format supports high-volume automated SMT placement and is distinct from the "H" suffix (7-inch reel, 850 units) used in other variants of the same device.
How does SMCJ70AHM3/I differ from unmarked SMCJ70A parts?
SMCJ70AHM3/I explicitly denotes halogen-free (HM3) and AEC-Q101 qualification, whereas generic SMCJ70A may refer to commercial-grade E3 or M3 versions lacking automotive validation. Only HM3- and HE3-suffixed variants meet AEC-Q101; the "I" further specifies reel size and quantity-ensuring full compliance traceability for SMCJ70AHM3/I.
What is the thermal resistance of SMCJ70AHM3/I from junction to ambient?
The typical junction-to-ambient thermal resistance (RθJA) of SMCJ70AHM3/I is 75 °C/W when mounted on the minimum recommended pad layout (0.31" × 0.31" copper pads per terminal). This value guides thermal design for sustained power dissipation and must be derated above TA = 25 °C per Figure 2 in the Vishay datasheet 88394.
SMCJ70AHM3/I 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ70AHM3/I FAQ
1.How can I place an order for SMCJ70AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ70AHM3/I 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 SMCJ70AHM3/I reliable?
The price and inventory of SMCJ70AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ70AHM3/I is usually 5 days.
3.What payment methods are accepted for SMCJ70AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ70AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ70AHM3/I?
SMCJ70AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ70AHM3/I 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 SMCJ70AHM3/I?
For technical support, including SMCJ70AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ70AHM3/I requirements.
6.How does Aetrix verify that SMCJ70AHM3/I is sourced from the original manufacturer or authorized distributors?
All SMCJ70AHM3/I 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 SMCJ70AHM3/I meets industry standards.
7.What is the process for return or replacement of SMCJ70AHM3/I?
All SMCJ70AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ70AHM3/I, 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 SMCJ70AHM3/I part is unused and in its original packaging.
Return procedure for SMCJ70AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ70AHM3/I Tags
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