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Vishay General Semiconductor - Diodes Division SMCJ70CA-E3/57T
- Part No.:
- SMCJ70CA-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ70CA-E3/57T.pdf
- Description:
- TVS DIODE 70VWM 113VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,950
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Product details
Overview
SMCJ70CA-E3/57T 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 70 V standoff voltage (VWM), 113 V maximum clamping voltage at 13.3 A peak pulse current, and 1500 W peak pulse power dissipation with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the SMCJ70CA-E3/57T datasheet, SMCJ70CA-E3/57T pinout, SMCJ70CA-E3/57T application, or SMCJ70CA-E3/57T equivalent, key selection criteria include bidirectional clamping capability, RoHS-compliant matte tin plating, MSL Level 1 rating, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling protection of AC-coupled or floating signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 µA at 70 V), while the low incremental surge resistance supports consistent clamping performance under repetitive transient stress.
The device is rated for -55 °C to +150 °C operating junction temperature and exhibits a typical thermal resistance of 75 °C/W (junction-to-ambient) on standard PCB pads. Its 10/1000 µs waveform response delivers sub-nanosecond turn-on, with clamping voltage tightly bounded at 113 V up to 13.3 A IPPM - critical for safeguarding 72 V nominal systems against ISO 7637-2 or IEC 61000-4-5 surges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 77.8 V / 86.0 V at 1.0 mA - guaranteed breakdown threshold range defining turn-on consistency |
| VC @ IPPM | 113 V at 13.3 A - clamped voltage seen by protected circuit during 10/1000 µs surge |
| PPPM | 1500 W - peak transient energy absorption capacity under standardized surge waveform |
| ID @ VWM | ≤1.0 µA - ultra-low reverse leakage preserves signal integrity and minimizes standby power loss |
| TJ max | +150 °C - enables reliable operation in under-hood automotive and high-temperature industrial environments |
| Package | SMC (DO-214AB) - industry-standard 2-pin surface-mount outline with 7.75 mm × 6.22 mm footprint |
Pinout & Package
SMCJ70CA-E3/57T uses the SMC (DO-214AB) package: a 2-terminal, non-polarized surface-mount case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Bidirectional construction means no cathode/anode marking; terminals are functionally identical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Either terminal serves as input/output for transient energy - symmetrical conduction eliminates orientation constraints during layout |
| Terminal 2 | Anode / Cathode (bidirectional) | Paired terminal completing the bidirectional clamping path; both pins connect directly to protected line and ground reference |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses, or ungrounded rails without polarity-sensitive placement |
| 1500 W peak pulse power | Withstands high-energy transients such as load dump (ISO 16750-2) or lightning-induced surges in 24 V/48 V systems |
| MSL Level 1 rating | Allows unlimited floor life and reflow at 260 °C peak - compatible with standard lead-free SMT assembly without baking |
| Glass passivated junction | Ensures long-term stability of breakdown voltage and low leakage across temperature and lifetime cycling |
| RoHS-compliant E3 suffix | Meets commercial-grade environmental compliance with matte tin terminations and UL 94 V-0 molding compound |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 72 V battery-fed ECUs and body control modules from load dump and alternator ripple. IC Role / Device Role / Timing Role: Primary clamping device placed between power rail and chassis ground to limit voltage excursions to safe levels. Use Value: Clamps to 113 V during 13.3 A transients - keeping downstream DC-DC converters and microcontrollers within absolute maximum ratings. | Use Scenario: Shielding analog outputs of pressure/temperature sensors in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Low-capacitance shunt protector on 4–20 mA current loop or 0–10 V output lines exposed to ESD and inductive switching noise. Use Value: Sub-1 µA leakage at 70 V prevents loading of precision analog circuits; bidirectional symmetry avoids polarity errors in field wiring. |
| Telecom DC Power Feeds | Renewable Energy Inverter Control |
Use Scenario: Safeguarding PoE-powered remote radios and base station controllers connected to -48 V DC distribution. IC Role / Device Role / Timing Role: Bidirectional TVS on DC input stage to absorb reverse-polarity misconnection events and lightning-induced common-mode surges. Use Value: Symmetric 77.8–86.0 V breakdown ensures equal clamping in forward/reverse fault conditions - eliminating need for dual unidirectional devices. | Use Scenario: Protecting gate drivers and MCU inputs in solar string inverters subject to grid-switching transients and ground potential shifts. IC Role / Device Role / Timing Role: Secondary-level transient suppressor on isolated 15 V auxiliary supply rails feeding optocouplers and level shifters. Use Value: 1500 W PPPM rating handles repeated surge events in outdoor installations; +150 °C TJ max supports operation inside sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ70CA-E3/52T | Lower PPPM (600 W), smaller SMB (DO-214AA) package, same VWM and VC | Limited to lower-energy transients; unsuitable for load dump or high-current surge scenarios | Select when board space is constrained and surge energy remains below 600 W |
| SMCJ70A-E3/57T | Unidirectional version - includes cathode band marking and forward voltage drop (~3.5 V @ 100 A) | Requires correct polarity placement; not usable on AC or floating nodes | Choose only for DC rails where polarity is fixed and forward conduction must be blocked |
Compared with SMBJ70CA-E3/52T and SMCJ70A-E3/57T, the SMCJ70CA-E3/57T uniquely combines 1500 W surge handling, bidirectional symmetry, and SMC package robustness - making it the preferred choice for high-reliability 70 V system protection where layout flexibility and energy margin are critical.
Availability
SMCJ70CA-E3/57T is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, telecom DC power feeds, and renewable energy inverter control requiring stable component supply and full traceability.
Supply support for SMCJ70CA-E3/57T 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 engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robust overvoltage immunity and long-term parametric stability are mandatory.
FAQ
What does the "CA" suffix indicate in SMCJ70CA-E3/57T?
The "CA" suffix denotes a bidirectional configuration - meaning the SMCJ70CA-E3/57T provides symmetrical clamping in both polarities, with no cathode marking required. This distinguishes it from unidirectional variants like SMCJ70A-E3/57T, which feature a cathode band and conduct only in reverse bias. The CA version is essential for protecting AC-coupled lines, differential pairs, or floating grounds where polarity cannot be assumed.
Is SMCJ70CA-E3/57T suitable for automotive AEC-Q101 qualification?
No - SMCJ70CA-E3/57T carries the E3 commercial-grade suffix, not HE3 or HM3. While the underlying SMCJ70CA die is AEC-Q101 qualified, the E3/57T variant is rated for commercial temperature range (-55 °C to +150 °C) but lacks the full automotive qualification documentation and traceability. For AEC-Q101 compliance, specify SMCJ70CAHE3_A/H or SMCJ70CAHM3_A/H with appropriate revision code.
What is the mounting pad layout recommendation for SMCJ70CA-E3/57T?
Vishay specifies a minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pad area per terminal for SMCJ70CA-E3/57T to achieve rated 1500 W peak pulse power. Smaller pads reduce thermal dissipation and derate surge capability significantly - for example, reducing pad size to 2.0 mm × 2.0 mm may limit IPPM to ~6 A instead of the rated 13.3 A. Always follow the layout guidelines in Document Number 88394, Figure 2.
How does SMCJ70CA-E3/57T compare to SMCJ70A-E3/57T in circuit implementation?
SMCJ70CA-E3/57T requires no polarity orientation during placement and clamps equally in both directions, simplifying layout for differential or floating nodes. In contrast, SMCJ70A-E3/57T has a cathode band and conducts forward current (~3.5 V drop at 100 A), making it unsuitable for AC paths. Use SMCJ70CA-E3/57T when protecting bidirectional signals or uncertain polarity rails; use SMCJ70A-E3/57T only for fixed-polarity DC lines needing forward-blocking capability.
What is the maximum reverse leakage current for SMCJ70CA-E3/57T at 70 V?
The maximum reverse leakage current (ID) for SMCJ70CA-E3/57T is 1.0 µA at VWM = 70 V and TA = 25 °C, as specified in the Electrical Characteristics table. This ultra-low leakage ensures minimal impact on high-impedance sensor circuits or battery-backed systems. Leakage increases with temperature - at 85 °C, ID typically rises to ~5 µA, remaining well within design margins for most industrial applications.
SMCJ70CA-E3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ70CA-E3/57T FAQ
1.How can I place an order for SMCJ70CA-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ70CA-E3/57T 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 SMCJ70CA-E3/57T reliable?
The price and inventory of SMCJ70CA-E3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ70CA-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ70CA-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ70CA-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ70CA-E3/57T?
SMCJ70CA-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ70CA-E3/57T 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 SMCJ70CA-E3/57T?
For technical support, including SMCJ70CA-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ70CA-E3/57T requirements.
6.How does Aetrix verify that SMCJ70CA-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ70CA-E3/57T 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 SMCJ70CA-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ70CA-E3/57T?
All SMCJ70CA-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ70CA-E3/57T, 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 SMCJ70CA-E3/57T part is unused and in its original packaging.
Return procedure for SMCJ70CA-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ70CA-E3/57T Tags
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