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Vishay General Semiconductor - Diodes Division SMCJ70CAHE3/57T
- Part No.:
- SMCJ70CAHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ70CAHE3/57T.pdf
- Description:
- TVS DIODE 70VWM 113VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,156
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Product details
Overview
SMCJ70CAHE3/57T from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients on power 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 (PPPM) with 10/1000 μs waveform - used to protect automotive ECUs, industrial I/O modules, and telecom interface circuits.
For engineers reviewing the SMCJ70CAHE3/57T datasheet, SMCJ70CAHE3/57T pinout, SMCJ70CAHE3/57T application, or SMCJ70CAHE3/57T equivalent, key selection criteria include bidirectional surge capability, AEC-Q101 qualification, low clamping ratio (VC/VWM ≈ 1.61), thermal resistance (RθJA = 75 °C/W), and compatibility with automated SMT assembly on 8 mm × 8 mm copper pads.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1 μA at VWM), while the low incremental surge resistance supports consistent clamping under repetitive transient events.
The device is rated for -55 °C to +150 °C operating junction temperature and meets MSL Level 1 per J-STD-020 with 260 °C peak reflow profile. Its AEC-Q101 qualification confirms suitability for automotive under-hood and body-control applications requiring high reliability under thermal cycling and mechanical stress.
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 - guaranteed breakdown range defining turn-on threshold |
| VC @ IPPM | 113 V at 13.3 A - clamped voltage during 10/1000 μs surge, limiting downstream stress |
| PPPM | 1500 W - peak transient energy absorption capacity under standardized waveform |
| ID @ VWM | <1 μA - ultra-low leakage preserves signal integrity and minimizes standby power loss |
| TJ max. | +150 °C - enables operation in high-temperature environments like engine control units |
| RθJA | 75 °C/W - thermal resistance from junction to ambient, guiding heatsinking requirements |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded plastic case with matte tin-plated leads; dimensions 7.75 mm × 6.22 mm × 2.62 mm (L × W × H); UL 94 V-0 rated; no polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | One terminal of symmetrical PN junction; conducts surge current in either direction |
| Cathode | Transient current exit (bidirectional) | Second terminal of symmetrical PN junction; completes low-impedance path during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine management and ADAS sensor interfaces |
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under humidity and thermal stress |
| Low clamping ratio (VC/VWM) | 1.61 - minimizes overvoltage exposure to protected ICs compared to higher-ratio suppressors |
| MSL Level 1 rating | Supports standard SMT reflow without moisture-induced popcorn failure |
| RoHS-compliant & halogen-free option available | Meets environmental compliance requirements for global electronics manufacturing |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontroller inputs against load-dump and jump-start transients in vehicle body control modules. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between power rail and ground, responding within <1 ps to limit voltage excursion. Use Value: Withstands 1500 W surges while maintaining VC ≤ 113 V, preventing latch-up or gate oxide damage in downstream ASICs. | Use Scenario: Safeguarding RS-485 transceiver I/O pins in factory automation PLCs exposed to ESD and inductive switching noise. IC Role / Device Role / Timing Role: Low-capacitance (typ. <100 pF) bidirectional shunt clamp across differential pair, preserving signal integrity up to 10 Mbps. Use Value: Sub-μA leakage at 70 V VWM avoids DC bias shift; fast response prevents data corruption during 8 kV contact ESD events. |
| Telecom AC Adapter Input Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Suppressing line-to-line surges on secondary-side DC outputs of isolated AC/DC adapters used in VoIP phones and base stations. IC Role / Device Role / Timing Role: Bidirectional TVS placed across output rails to clamp common-mode and differential transients induced by lightning or grid switching. Use Value: 1500 W PPPM rating handles IEC 61000-4-5 Combination Wave (1.2/50 μs & 8/20 μs) surges without degradation. | Use Scenario: Shielding MCU GPIOs driving brushed DC motors in smart home appliances from back-EMF spikes during commutation. IC Role / Device Role / Timing Role: Localized TVS at motor driver output stage, absorbing inductive kickback before it reaches logic-level circuitry. Use Value: 13.3 A IPPM capability safely diverts >100 mJ pulses; AEC-Q101 qualification ensures robustness across 10,000+ motor cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC70CA-E3/57T | Same VWM (70 V) and PPPM (1500 W), but lower VC (107 V) and higher IPPM (14.0 A); SAC series uses different chip design with tighter VBR tolerance | Better clamping performance in space-constrained designs where sub-110 V VC is critical | Select SAC70CA-E3/57T when lower clamping voltage is prioritized over legacy footprint compatibility |
| 1.5SMC70CA | Identical electrical specs (VWM = 70 V, VC = 113 V, PPPM = 1500 W), same SMC package, but not AEC-Q101 qualified and lacks HE3 suffix RoHS/halogen-free assurance | Suitable for commercial-grade industrial equipment where automotive qualification is unnecessary | Choose 1.5SMC70CA for cost-sensitive non-automotive applications with identical surge handling needs |
Compared with SMCJ70CAHE3/57T, SAC70CA-E3/57T offers improved clamping voltage at the expense of slightly higher cost and different thermal derating curve, while 1.5SMC70CA provides identical surge protection without automotive qualification or enhanced environmental compliance - making SMCJ70CAHE3/57T the optimal choice for AEC-Q101–mandated designs requiring full traceability and RoHS/halogen-free assurance.
Availability
SMCJ70CAHE3/57T is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, and telecommunications infrastructure requiring stable component supply with full AEC-Q101 documentation and RoHS/halogen-free compliance.
Supply support for SMCJ70CAHE3/57T 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 SMCJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where robustness against ISO 7637-2 and IEC 61000-4-5 threats is mandatory.
FAQ
What is the clamping voltage of SMCJ70CAHE3/57T at its rated peak pulse current?
The SMCJ70CAHE3/57T has a maximum clamping voltage (VC) of 113 V when subjected to its rated peak pulse current (IPPM) of 13.3 A under a 10/1000 μs waveform. This value is measured per JEDEC standards and guarantees that downstream components experience no more than 113 V during surge events - a critical parameter for ensuring safe operation of 75 V-rated ICs. The SMCJ70CAHE3/57T maintains this clamping performance across its full operating temperature range.
Is SMCJ70CAHE3/57T suitable for automotive applications?
Yes, SMCJ70CAHE3/57T is AEC-Q101 qualified and explicitly designated for automotive use via its "HE3" suffix, indicating RoHS-compliant and AEC-Q101–qualified construction. It is validated for under-hood and body-control module applications subject to thermal cycling, vibration, and load-dump transients per ISO 7637-2. The SMCJ70CAHE3/57T meets all required stress tests including high-temperature reverse bias and accelerated life testing per AEC-Q101 Rev D.
How does the bidirectional configuration of SMCJ70CAHE3/57T affect its PCB layout?
The SMCJ70CAHE3/57T has no polarity marking and functions identically in both directions, eliminating orientation constraints during placement. Unlike unidirectional TVS diodes, it requires no cathode band alignment - simplifying automated pick-and-place and reducing assembly errors. Its symmetrical structure allows direct integration across AC-coupled lines or differential buses without additional routing considerations. The SMCJ70CAHE3/57T should still be mounted on minimum 8.0 mm × 8.0 mm copper pads per terminal to achieve specified thermal and surge ratings.
What is the maximum steady-state power dissipation of SMCJ70CAHE3/57T?
The SMCJ70CAHE3/57T has a maximum steady-state power dissipation (PD) of 6.5 W when mounted on an infinite heatsink at TA = 50 °C. This rating reflects continuous DC or low-frequency power handling capability - distinct from its 1500 W peak pulse power (PPPM). In practice, PD governs thermal design for sustained leakage or bias conditions; the SMCJ70CAHE3/57T's RθJA of 75 °C/W means it will rise ~488 °C above ambient at full PD, so actual use requires derating or heatsinking. For transient-only applications, PD is rarely limiting.
Does SMCJ70CAHE3/57T meet UL safety certification requirements?
Yes, SMCJ70CAHE3/57T carries Underwriters Laboratories recognition under UL 497B (QVGQ2) for protector classification, with file number E136766 covering both unidirectional and bidirectional variants. This certification confirms compliance with insulation, flammability (UL 94 V-0), and surge withstand requirements for use in safety-critical signal and power line protection. The SMCJ70CAHE3/57T's molding compound and internal construction have been independently evaluated to meet these standards - essential for end-equipment listings in North America.
SMCJ70CAHE3/57T 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:
- -
- 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)
SMCJ70CAHE3/57T FAQ
1.How can I place an order for SMCJ70CAHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ70CAHE3/57T 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 SMCJ70CAHE3/57T reliable?
The price and inventory of SMCJ70CAHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ70CAHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ70CAHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ70CAHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ70CAHE3/57T?
SMCJ70CAHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ70CAHE3/57T 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 SMCJ70CAHE3/57T?
For technical support, including SMCJ70CAHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ70CAHE3/57T requirements.
6.How does Aetrix verify that SMCJ70CAHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ70CAHE3/57T 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 SMCJ70CAHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ70CAHE3/57T?
All SMCJ70CAHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ70CAHE3/57T, 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 SMCJ70CAHE3/57T part is unused and in its original packaging.
Return procedure for SMCJ70CAHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ70CAHE3/57T Tags
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