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Vishay General Semiconductor - Diodes Division SMCJ70CA-M3/57T
- Part No.:
- SMCJ70CA-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ70CA-M3/57T.pdf
- Description:
- TVS DIODE 70VWM 113VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,047
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Product details
Overview
SMCJ70CA-M3/57T from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients up to 1500 W peak pulse power with 113 V clamping voltage at 13.3 A peak pulse current, 70 V standoff voltage, and 77.8–86.0 V breakdown range - used to protect automotive sensor signal lines, industrial I/O ports, and DC power rails.
For engineers reviewing the SMCJ70CA-M3/57T datasheet, SMCJ70CA-M3/57T pinout, SMCJ70CA-M3/57T application, or SMCJ70CA-M3/57T equivalent, key selection criteria include bidirectional clamping capability, 1500 W 10/1000 µs surge rating, 75 °C/W junction-to-ambient thermal resistance, halogen-free RoHS-compliant construction, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This device operates as a voltage-clamping protection element across sensitive circuit nodes, responding within picoseconds to transient overvoltages induced by inductive switching or ESD events. Its bidirectional architecture enables symmetrical suppression of both positive and negative polarity surges without polarity marking on the case.
It features glass-passivated junction construction for stable leakage performance, meets MSL Level 1 per J-STD-020, and supports operation from –55 °C to +150 °C junction temperature. The SMCJ70CA-M3/57T is rated for 1.0 µA maximum reverse leakage at 70 V standoff and exhibits a 0.105 %/°C temperature coefficient of breakdown voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC or AC RMS working limit. |
| VBR min/max | 77.8 V / 86.0 V at 1 mA - Verified breakdown threshold range; ensures reliable turn-on above normal operating voltage. |
| VC @ IPPM | 113 V at 13.3 A - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on protected IC or MOSFET. |
| PPPM | 1500 W - Peak pulse power handling per 10/1000 µs waveform; defines transient energy absorption capacity. |
| IPPM | 13.3 A - Peak pulse current corresponding to VC; used to size PCB trace width and verify layout survivability. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on standard 8.0 mm × 8.0 mm copper pads; guides thermal derating above 25 °C ambient. |
| TJ max | +150 °C - Maximum allowable junction temperature; sets upper limit for power dissipation and ambient operating range. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, matte tin-plated terminals solderable per J-STD-002 and JESD 22-B102. No polarity marking - bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Provides low-impedance path for negative-going transients; electrically symmetric with cathode terminal. |
| Cathode | Transient return path (bidirectional) | Provides low-impedance path for positive-going transients; electrically symmetric with anode terminal. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns. |
| 1500 W peak pulse power | Supports robust immunity against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 4 surges. |
| 75 °C/W thermal resistance | Allows direct mounting on standard PCB copper areas without heatsink for intermittent surge duty. |
| MSL Level 1 rating | Permits unlimited floor life and reflow compatibility with standard lead-free solder profiles up to 260 °C peak. |
| Halogen-free construction | Meets IPC-4101D/21 and JEDEC JS709C requirements for environmentally compliant electronics assembly. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive kickback in 12 V/24 V vehicle systems. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across signal line and ground, activated only during overvoltage events. Use Value: Limits transient voltage to ≤113 V, preventing damage to sub-100 V-rated transceivers and ADC front-ends while maintaining signal integrity during normal operation. | Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to relay coil flyback and field wiring surges in factory automation. IC Role / Device Role / Timing Role: Parallel-connected TVS across isolated input optocoupler or Schmitt trigger input pins. Use Value: Absorbs up to 1500 W surge energy without degradation, enabling compliance with IEC 61000-4-5 (4 kV/2 Ω) test requirements for industrial equipment. |
| DC Power Rail Protection | Telecom Line Interface Protection |
Use Scenario: Guarding 48 V telecom power distribution boards and PoE-powered devices against lightning-induced surges on backplane traces. IC Role / Device Role / Timing Role: Primary clamping device placed between power rail and chassis/earth ground near connector entry point. Use Value: Clamps 70 V nominal rail to 113 V during surge, preserving downstream DC-DC converters and load switches rated for 120 V absolute maximum. | Use Scenario: Protecting Ethernet PHY interface circuits (e.g., RJ45 magnetics secondary side) from ESD and induced surges in enterprise network switches. IC Role / Device Role / Timing Role: Bidirectional TVS mounted across differential pair (e.g., TX+/TX−) and/or common-mode lines. Use Value: Provides <1 µA leakage at 70 V, ensuring minimal impact on high-speed signal integrity while delivering 1500 W surge immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ70CA-M3/57T | Lower peak pulse power (600 W), smaller SMB (DO-214AA) package, same VWM/VC ratings. | Reduced surge margin; suitable only for lower-energy environments (e.g., consumer USB ports). | Select when board space is constrained and surge threat level is limited to IEC 61000-4-2 ±8 kV contact discharge. |
| SMCJ70A-M3/57T | Unidirectional version with cathode band marking; identical VWM, VBR, VC, and PPPM. | Requires polarity-aware layout; appropriate for DC-biased lines where negative transients are absent or blocked. | Choose when protecting grounded DC rails with known unidirectional surge polarity, e.g., automotive battery feeds. |
Compared with SMBJ70CA-M3/57T and SMCJ70A-M3/57T, the SMCJ70CA-M3/57T delivers higher surge energy handling in a bidirectional configuration without polarity constraints - making it optimal for floating or AC-coupled interfaces where full-spectrum transient immunity is required without redesigning layout polarity.
Availability
SMCJ70CA-M3/57T is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, and DC power rail safeguarding requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ70CA-M3/57T 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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices for high-reliability industrial, automotive, and computing applications.
The SMCJ series is engineered specifically for high-power transient suppression in harsh electromagnetic environments, targeting design-in for AEC-Q101-qualified automotive systems and industrial equipment meeting IEC 61000-4-x immunity standards.
FAQ
What is the clamping voltage of SMCJ70CA-M3/57T under a 10/1000 µs surge?
The SMCJ70CA-M3/57T has a maximum clamping voltage (VC) of 113 V at 13.3 A peak pulse current under the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events - critical for verifying compatibility with downstream ICs rated for ≤120 V absolute maximum.
Is SMCJ70CA-M3/57T suitable for automotive applications?
Yes, the SMCJ70CA-M3/57T is halogen-free, RoHS-compliant, and part of the AEC-Q101-qualified SMCJ family (when ordered with HE3 or HM3 suffixes). While the -M3/57T variant itself is commercial-grade, its electrical and thermal specifications - including 150 °C TJ max, MSL Level 1, and robust surge capability - align with automotive subsystem requirements such as body control modules and sensor interfaces.
How does the bidirectional nature of SMCJ70CA-M3/57T affect PCB layout?
The SMCJ70CA-M3/57T has no polarity marking and functions identically in both directions, eliminating orientation constraints during automated placement. Unlike unidirectional variants (e.g., SMCJ70A-M3/57T), it requires no cathode band alignment - simplifying layout, reducing assembly errors, and enabling use on AC-coupled or floating differential lines without signal inversion concerns.
What is the thermal resistance of SMCJ70CA-M3/57T, and how does it impact board design?
The SMCJ70CA-M3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper pads per terminal. This value assumes no external heatsinking; designers must derate power dissipation above 25 °C ambient using Fig. 2 from Vishay document 88394 and ensure adequate copper area to maintain TJ ≤ 150 °C during repetitive surge events.
Does SMCJ70CA-M3/57T meet industry surge immunity standards?
Yes, the SMCJ70CA-M3/57T's 1500 W peak pulse power rating and 113 V clamping voltage enable compliance with key surge immunity standards including IEC 61000-4-5 (4 kV/2 Ω combination wave), ISO 7637-2 (Pulse 1, 2a, 5a), and GR-1089-CORE (lightning-induced surges). Its performance is validated under standardized 10/1000 µs waveforms per ANSI/IEEE C62.35.
SMCJ70CA-M3/57T 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 (SMC)
SMCJ70CA-M3/57T FAQ
1.How can I place an order for SMCJ70CA-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ70CA-M3/57T 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-M3/57T reliable?
The price and inventory of SMCJ70CA-M3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ70CA-M3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ70CA-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ70CA-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ70CA-M3/57T?
SMCJ70CA-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ70CA-M3/57T 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-M3/57T?
For technical support, including SMCJ70CA-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ70CA-M3/57T requirements.
6.How does Aetrix verify that SMCJ70CA-M3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ70CA-M3/57T 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-M3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ70CA-M3/57T?
All SMCJ70CA-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ70CA-M3/57T, 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-M3/57T part is unused and in its original packaging.
Return procedure for SMCJ70CA-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ70CA-M3/57T Tags
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