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Vishay General Semiconductor - Diodes Division SMCJ70CAHE3_A/I
- Part No.:
- SMCJ70CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ70CAHE3_A/I.pdf
- Description:
- TVS DIODE 70VWM 113VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,766
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Product details
Overview
SMCJ70CAHE3_A/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 70 V standoff voltage (VWM), 113 V maximum clamping voltage (VC) at 13.3 A peak pulse current (IPPM), and 1500 W peak pulse power dissipation (PPPM) with 10/1000 µs waveform - deployed in automotive ECUs, industrial motor drives, and telecom interface circuits.
For engineers reviewing the SMCJ70CAHE3_A/I datasheet, SMCJ70CAHE3_A/I pinout, SMCJ70CAHE3_A/I application, or SMCJ70CAHE3_A/I equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification for automotive use, low thermal resistance (RθJL = 15 °C/W), and compatibility with automated SMT assembly on standard 8.0 mm × 8.0 mm copper pads.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with breakdown voltage (VBR) ranging from 77.8 V to 86.0 V at 1 mA test current and ±10% tolerance. Its glass-passivated junction ensures stable avalanche characteristics and fast response time (<1 ns), enabling suppression of ESD, lightning-induced surges, and inductive switching transients before sensitive downstream ICs are damaged.
The device is rated for continuous operation from –55 °C to +150 °C junction temperature, meets MSL level 1 per J-STD-020 (peak reflow 260 °C), and exhibits low incremental surge resistance - critical for maintaining predictable clamping under high-energy transients without thermal runaway.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - maximum continuous reverse operating voltage before leakage exceeds 1 μA; defines safe DC rail protection threshold |
| VBR min/max | 77.8 V / 86.0 V at 1 mA - guaranteed avalanche onset range; ensures consistent turn-on across production lots |
| VC @ IPPM | 113 V at 13.3 A (10/1000 µs) - clamping voltage during worst-case surge; determines protected circuit's maximum stress level |
| PPPM | 1500 W - peak transient energy handling capacity; enables compliance with IEC 61000-4-5 Level 4 (4 kV/2 Ω) |
| RθJL | 15 °C/W - low junction-to-lead thermal resistance; supports reliable power dissipation without external heatsinking |
| TJ max | +150 °C - maximum junction temperature rating; allows operation in under-hood automotive environments |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including HTOL, TC, and ESD testing per AEC specification |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; no polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive polarity) | One terminal of symmetrical avalanche junction; conducts during positive transients relative to cathode |
| Cathode | Transient current entry (negative polarity) | Second terminal of symmetrical junction; conducts during negative transients relative to anode; no band marking |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both directions - eliminates need for polarity-aware layout in AC-coupled or floating signal paths |
| AEC-Q101 qualification | Validated for automotive electronics - supports deployment in engine control units, ADAS sensors, and infotainment power supplies |
| Low RθJL (15 °C/W) | Enables efficient heat transfer to PCB copper - sustains repeated surge events without thermal derating on standard 2-oz FR4 |
| Glass passivated junction | Stable, repeatable avalanche behavior over lifetime - prevents parameter drift due to moisture or contamination ingress |
| MSL Level 1 rating | Compatible with standard lead-free reflow profiles up to 260 °C peak - supports high-yield automated assembly without baking |
Applications
| Automotive Power Rail Protection | Industrial Motor Drive Control |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-supplied microcontrollers and CAN transceivers from load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at power input stage to limit rail excursions below IC absolute maximum ratings. Use Value: Clamps 113 V surges at 13.3 A while maintaining <1 μA leakage at 70 V - preserves system sleep current and avoids false resets. | Use Scenario: Safeguarding gate drivers and position feedback circuits in variable-frequency drives exposed to IGBT switching noise. IC Role / Device Role / Timing Role: Transient shunt across isolated DC link sensing inputs to suppress common-mode spikes induced by fast dV/dt switching. Use Value: Symmetric clamping ensures equal protection for both polarities of differential analog signals - maintains ADC accuracy during PWM transitions. |
| Telecom Interface Protection | Consumer Equipment Surge Suppression |
Use Scenario: Shielding RS-485 transceivers and Ethernet PHYs from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary-level TVS mounted at connector entry point, upstream of secondary filtering and isolation barriers. Use Value: 1500 W PPPM rating meets IEC 61000-4-5 Ed. 3 requirements for Class B equipment - reduces need for multi-stage protection networks. | Use Scenario: Preventing damage to USB-C PD controllers and display interface ICs during hot-plug events and ESD discharge. IC Role / Device Role / Timing Role: Low-capacitance transient suppressor integrated into compact portable device PCBs with tight space constraints. Use Value: SMC package footprint (7.75 mm × 6.22 mm) fits dense layouts while delivering full 1500 W surge capability - avoids trade-off between size and robustness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC70CA | Lower PPPM (600 W), same VWM (70 V), smaller SMA package | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 | Select when board space is constrained and surge threat level is limited to IEC 61000-4-2 ESD only |
| SMCJ70CAHM3_A/I | Halogen-free variant; identical electrical specs and AEC-Q101 qualification | No functional difference; required only where halogen-free compliance is mandated | Choose for RoHS+halogen-free programs without compromising performance or qualification status |
Compared with SAC70CA and SMCJ70CAHM3_A/I, the SMCJ70CAHE3_A/I delivers full 1500 W surge immunity in a commercial-grade RoHS-compliant variant, making it optimal for cost-sensitive automotive and industrial designs requiring proven AEC-Q101 reliability without halogen-free overhead.
Availability
SMCJ70CAHE3_A/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial motor drives, and telecom interface protection requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ70CAHE3_A/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 engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where failure modes must be mitigated without adding complexity or cost to the protection network.
FAQ
What is the clamping voltage of SMCJ70CAHE3_A/I at its rated peak pulse current?
The SMCJ70CAHE3_A/I has a maximum clamping voltage (VC) of 113 V when subjected to its rated peak pulse current (IPPM) of 13.3 A using the standard 10/1000 µs waveform. This value is measured under defined test conditions per JEDEC standards and represents the upper voltage limit imposed on protected circuitry during a full-rated surge event. The SMCJ70CAHE3_A/I maintains this clamping performance symmetrically in both directions due to its bidirectional construction.
Is SMCJ70CAHE3_A/I qualified for automotive applications?
Yes, the SMCJ70CAHE3_A/I is AEC-Q101 qualified, meaning it has passed rigorous stress tests including high-temperature operating life, temperature cycling, and ESD robustness specifically for automotive electronic components. This qualification confirms suitability for under-hood and cabin applications such as body control modules, infotainment power supplies, and sensor interfaces. The SMCJ70CAHE3_A/I carries the HE3 suffix denoting AEC-Q101 compliance per Vishay's ordering nomenclature.
How does the bidirectional nature of SMCJ70CAHE3_A/I affect its PCB layout?
The SMCJ70CAHE3_A/I has no polarity marking and functions identically in both directions, so PCB layout requires no orientation alignment - the device can be placed in either direction without affecting protection performance. This simplifies automated placement and eliminates risk of misorientation-related field failures. Layout best practices still require symmetric copper pour on both terminals and adherence to the recommended 8.0 mm × 8.0 mm pad dimensions to ensure specified thermal and surge performance for the SMCJ70CAHE3_A/I.
What is the maximum operating temperature for SMCJ70CAHE3_A/I?
The SMCJ70CAHE3_A/I has a maximum junction temperature (TJ max) of +150 °C and an operating junction and storage temperature range of –55 °C to +150 °C. This wide range supports deployment in demanding environments including automotive engine compartments and industrial enclosures. Derating curves in the datasheet show that peak pulse power must be reduced above 25 °C ambient, with 50% derating applied at +125 °C ambient for sustained reliability of the SMCJ70CAHE3_A/I.
Does SMCJ70CAHE3_A/I meet RoHS requirements?
Yes, the SMCJ70CAHE3_A/I is RoHS-compliant per EU Directive 2011/65/EU, as indicated by the "HE3" suffix in its part number. It contains no lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBB), or polybrominated diphenyl ethers (PBDE). The device uses matte tin-plated leads and complies with JESD 201 Class 2 whisker resistance requirements. Full material declarations and compliance documentation are available through Vishay's official product portal for the SMCJ70CAHE3_A/I.
SMCJ70CAHE3_A/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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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)
SMCJ70CAHE3_A/I FAQ
1.How can I place an order for SMCJ70CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ70CAHE3_A/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 SMCJ70CAHE3_A/I reliable?
The price and inventory of SMCJ70CAHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ70CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMCJ70CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ70CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ70CAHE3_A/I?
SMCJ70CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ70CAHE3_A/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 SMCJ70CAHE3_A/I?
For technical support, including SMCJ70CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ70CAHE3_A/I requirements.
6.How does Aetrix verify that SMCJ70CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMCJ70CAHE3_A/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 SMCJ70CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMCJ70CAHE3_A/I?
All SMCJ70CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ70CAHE3_A/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 SMCJ70CAHE3_A/I part is unused and in its original packaging.
Return procedure for SMCJ70CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ70CAHE3_A/I Tags
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