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Vishay General Semiconductor - Diodes Division SMCG70CAHE3/57T
- Part No.:
- SMCG70CAHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG70CAHE3/57T.pdf
- Description:
- TVS DIODE 70VWM 113VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,100
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Product details
Overview
SMCG70CAHE3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) package, designed for robust overvoltage protection on signal and power lines. It features a 70 V stand-off voltage (VWM), 77.8–86.0 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (10/1000 µs), clamping voltage of 113 V at 13.3 A IPPM, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SMCG70CAHE3/57T datasheet, SMCG70CAHE3/57T pinout, SMCG70CAHE3/57T application, or SMCG70CAHE3/57T equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VWM ≈ 1.61), MSL Level 1 reflow compatibility, RoHS compliance with AEC-Q101 qualification, and suitability for CAN bus, LIN, sensor I/O, and automotive body electronics protection.
Technical Context
The SMCG70CAHE3/57T operates as a bidirectional avalanche diode, symmetrically clamping transients above ±77.8 V in either polarity. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at 70 V), while its low incremental surge resistance enables effective energy diversion during 10/1000 µs surges up to 13.3 A.
Thermally, it exhibits RθJA = 75 °C/W and RθJL = 15 °C/W, supporting operation from –55 °C to +150 °C. The device is rated for 6.5 W steady-state dissipation at TA = 50 °C and meets UL 497B recognition (QVGQ2) for telecom and industrial protectors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - maximum continuous reverse working voltage before clamping begins |
| VBR (min/max) | 77.8 V / 86.0 V at 1 mA - guaranteed avalanche onset range under standardized test conditions |
| VC @ IPPM | 113 V at 13.3 A - clamped voltage during 10/1000 µs surge, defining protected circuit stress level |
| PPPM | 1500 W - peak transient power handling capacity per standard waveform |
| ID @ VWM | <1.0 µA - ultra-low leakage ensures minimal standby current impact on sensitive inputs |
| TJ max. | +150 °C - junction temperature limit enabling under-hood automotive deployment |
| Qualification | AEC-Q101 qualified - validated for automotive-grade reliability and stress testing |
Pinout & Package
Package: SMCG (DO-215AB) - surface-mount, low-profile gull-wing leaded case with matte tin-plated terminals, compliant with J-STD-002 and JESD 22-B102 solderability standards. No polarity marking on bidirectional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | One terminal of symmetrical avalanche junction; accepts surge current in either direction |
| Cathode | Transient current entry (positive polarity) | Second terminal of symmetrical junction; functionally identical to Anode in bidirectional mode |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential lines without polarity concerns |
| 1500 W peak pulse rating | Withstands high-energy transients such as ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 4 |
| AEC-Q101 qualification | Validates reliability for automotive applications including engine control, ADAS sensors, and infotainment interfaces |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow without preconditioning or special handling |
| UL 497B recognition (QVGQ2) | Meets safety requirements for telecom and industrial signal line protectors |
Applications
| Automotive Sensor I/O Protection | CAN Bus Transient Suppression |
|---|---|
Use Scenario: Protecting analog and digital outputs of pressure, temperature, and position sensors in engine bay and chassis modules. IC Role / Device Role / Timing Role: Bidirectional TVS placed across sensor supply and ground or signal pair to clamp load dump and inductive switching spikes. Use Value: Prevents latch-up or damage to MCU ADC inputs and analog front-ends by limiting transient voltage to ≤113 V during 13.3 A surges. | Use Scenario: Safeguarding CANH/CANL differential pair against ESD and coupled transients in vehicle networking nodes. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp installed between CANH–CANL and ground to suppress common-mode surges without distorting data integrity. Use Value: Maintains CAN signal rise/fall times due to minimal parasitic capacitance and fast <1 ps response, meeting ISO 11898-2 EMC immunity requirements. |
| Industrial PLC Digital Input Protection | Telecom Line Interface Protection |
Use Scenario: Shielding 24 V DC digital input channels in programmable logic controllers from field-wiring induced surges. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between input terminal and common rail to absorb repetitive switching transients from solenoid loads. Use Value: Enables >100,000 surge cycles at rated PPPM without degradation, extending system uptime in factory automation environments. | Use Scenario: Protecting Ethernet PHY or RS-485 transceivers in network edge equipment exposed to lightning-induced surges. IC Role / Device Role / Timing Role: UL-recognized bidirectional suppressor placed on data lines per IEC 61000-4-5 guidelines to meet EN 61000-4-5 Level 4 immunity. Use Value: Provides certified surge withstand up to 4 kV (line-to-ground) and 2 kV (line-to-line), reducing need for external gas discharge tubes. |
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 | Unidirectional; same VWM/VBR/PPPM but lacks bidirectional symmetry and AEC-Q101 qualification | Requires separate devices for dual-polarity protection; not approved for automotive under-hood use | Select only if polarity is fixed and automotive qualification is unnecessary |
| SMCJ70CA | Same bidirectional specs but in larger DO-214AB (SMC) package; higher thermal mass but incompatible footprint | Not drop-in replaceable-requires PCB redesign; better for higher average power dissipation scenarios | Choose when board space allows larger package and enhanced thermal derating is needed |
Compared with SMAJ70A-E3/57T and SMCJ70CA, the SMCG70CAHE3/57T uniquely combines bidirectional operation, AEC-Q101 qualification, and DO-215AB compactness-making it optimal for space-constrained automotive and industrial signal line protection where polarity-agnostic clamping and automotive reliability are mandatory.
Availability
SMCG70CAHE3/57T is available at Aetrix Electronics and suitable for automotive sensor interfaces, CAN bus nodes, industrial PLC inputs, and telecom line interfaces requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant sourcing.
Supply support for SMCG70CAHE3/57T 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, efficiency, and application-specific optimization.
The SMCG series is engineered for high-energy transient suppression in demanding environments-specifically targeting automotive, industrial, and telecom applications where compact size, bidirectional clamping, and AEC-Q101 validation are critical design requirements.
FAQ
What is the clamping voltage of the SMCG70CAHE3/57T under a 10/1000 µs surge?
The SMCG70CAHE3/57T clamps to a maximum of 113 V at 13.3 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is measured with the device mounted on 8.0 mm × 8.0 mm copper pads per JEDEC test conditions.
Is the SMCG70CAHE3/57T suitable for automotive applications?
Yes, the SMCG70CAHE3/57T is AEC-Q101 qualified and explicitly rated for automotive use-including under-hood and chassis-mounted systems. Its operating junction temperature range (–55 °C to +150 °C), MSL Level 1 reflow compatibility, and UL 497B recognition confirm suitability for engine control units, ADAS sensors, and body electronics where reliability under thermal and electrical stress is essential.
Does the SMCG70CAHE3/57T have polarity markings on the package?
No, the SMCG70CAHE3/57T does not feature polarity markings because it is a bidirectional TVS diode. Unlike unidirectional variants (e.g., SMCG70A), which use a cathode band, the CA suffix indicates symmetrical avalanche behavior-meaning both terminals function identically regardless of voltage polarity applied across them.
What is the maximum leakage current of the SMCG70CAHE3/57T at its stand-off voltage?
The SMCG70CAHE3/57T exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 70 V stand-off voltage (VWM), measured at TA = 25 °C. This ultra-low leakage ensures minimal loading on high-impedance signal paths such as sensor outputs or communication bus lines, preserving accuracy and signal integrity in precision analog and digital systems.
How does the SMCG70CAHE3/57T differ from the SMCG70A variant?
The SMCG70CAHE3/57T is bidirectional with symmetrical clamping in both polarities, while the SMCG70A is unidirectional and conducts only in reverse bias. The CA version supports AC-coupled or differential line protection without polarity constraints, whereas the A version requires correct orientation and cannot suppress positive-going transients on the anode side. Both share identical VWM, PPPM, and package-but only SMCG70CAHE3/57T carries AEC-Q101 qualification.
SMCG70CAHE3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-215AB, SMC Gull Wing
- 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 (SMCG)
SMCG70CAHE3/57T FAQ
1.How can I place an order for SMCG70CAHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG70CAHE3/57T 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 SMCG70CAHE3/57T reliable?
The price and inventory of SMCG70CAHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG70CAHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCG70CAHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG70CAHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG70CAHE3/57T?
SMCG70CAHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG70CAHE3/57T 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 SMCG70CAHE3/57T?
For technical support, including SMCG70CAHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG70CAHE3/57T requirements.
6.How does Aetrix verify that SMCG70CAHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG70CAHE3/57T 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 SMCG70CAHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCG70CAHE3/57T?
All SMCG70CAHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG70CAHE3/57T, 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 SMCG70CAHE3/57T part is unused and in its original packaging.
Return procedure for SMCG70CAHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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