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Vishay General Semiconductor - Diodes Division SMCJ70CA-M3/9AT
- Part No.:
- SMCJ70CA-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ70CA-M3/9AT.pdf
- Description:
- TVS DIODE 70VWM 113VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,034
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Product details
Overview
SMCJ70CA-M3/9AT 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 a 10/1000 μs waveform, 113 V maximum clamping voltage at 13.3 A peak pulse current, and 70 V standoff voltage - deployed for protecting MOSFETs, ICs, and sensor signal lines in automotive and industrial power electronics.
For engineers reviewing the SMCJ70CA-M3/9AT datasheet, SMCJ70CA-M3/9AT pinout, SMCJ70CA-M3/9AT application, or SMCJ70CA-M3/9AT equivalent, key selection criteria include bidirectional clamping capability, 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 TVS diode operates symmetrically in both directions due to its bidirectional CA suffix configuration, enabling protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable breakdown behavior under repetitive surge stress, while low incremental surge resistance supports consistent clamping performance across surge events.
The device meets MSL level 1 per J-STD-020 with 260 °C lead-free reflow peak temperature tolerance and is rated for operation from −55 °C to +150 °C junction temperature. It delivers 113 V clamping voltage at 13.3 A IPPM under standardized 10/1000 μs waveform conditions, with <1.0 μA reverse leakage at 70 V standoff voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 70 V - maximum continuous reverse operating voltage before clamping initiates |
| Breakdown Voltage (VBR) | 77.8–86.0 V at 1 mA - guaranteed conduction onset range defining transient response threshold |
| Clamping Voltage (VC) | 113 V at 13.3 A IPPM - peak voltage seen by protected circuit during 10/1000 μs surge |
| Peak Pulse Power (PPPM) | 1500 W - surge energy handling capacity under standard 10/1000 μs waveform |
| Junction Temperature Range | −55 °C to +150 °C - operational envelope supporting under-hood automotive and industrial environments |
| Thermal Resistance (RθJA) | 75 °C/W - junction-to-ambient thermal impedance on recommended 8.0 mm × 8.0 mm copper pads |
| Package | SMC (DO-214AB) - surface-mount outline with 0.320" body length and matte tin-plated leads |
Pinout & Package
SMCJ70CA-M3/9AT uses the SMC (DO-214AB) package: a surface-mount, molded plastic case with two terminals, no polarity marking (bidirectional), and matte tin-plated leads compliant with J-STD-002 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; symmetrical with cathode in bidirectional operation | Enables identical clamping behavior for positive and negative transients - no orientation required during PCB placement |
| Cathode | Current exit terminal in forward bias; symmetrical with anode in bidirectional operation | Terminal pair forms a voltage-triggered shunt path that activates above VBR in either polarity direction |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Provides symmetrical overvoltage protection for AC signals, differential buses, or ungrounded circuits without polarity dependency |
| 1500 W peak pulse power | Handles high-energy transients from inductive switching or lightning-induced surges in industrial motor drives and power supplies |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets environmental compliance requirements for automotive and consumer electronics manufacturing without compromising surge robustness |
| MSL Level 1 rating | Supports standard lead-free reflow profiles up to 260 °C peak temperature without moisture-related reliability risk |
| Glass-passivated junction | Ensures stable VBR and low leakage over lifetime, critical for long-term reliability in harsh ambient conditions |
Applications
| Automotive Sensor Protection | Industrial Motor Drive I/O |
|---|---|
Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD events in engine control units. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector interface to limit transient voltage before it reaches sensitive analog front-end or communication ICs. Use Value: Maintains signal integrity under ISO 7637-2 Pulse 5a (load dump) with 113 V clamping, preventing latch-up or damage to 5 V or 3.3 V logic interfaces. | Use Scenario: Safeguarding digital I/O and feedback signal lines in variable-frequency drives exposed to inductive kickback from contactor switching. IC Role / Device Role / Timing Role: Standoff-rated TVS placed across isolated signal inputs to suppress fast-rising transients (<1 ns rise time) induced by relay coil de-energization. Use Value: Limits voltage excursions to ≤113 V during 13.3 A surge events, preserving isolation barrier integrity and preventing false triggering of safety shutdown circuits. |
| Telecom Line Interface | Consumer Power Adapter EMI Filtering |
Use Scenario: Shielding Ethernet PHYs and PoE controllers from induced surges on twisted-pair cabling in outdoor telecom cabinets. IC Role / Device Role / Timing Role: Bidirectional TVS integrated into common-mode choke output stage to absorb differential-mode transients before reaching magnetics and PHY IC. Use Value: Clamps 10/1000 μs surges to 113 V while maintaining <1.0 μA leakage at 70 V, ensuring minimal impact on DC bias and signal attenuation. | Use Scenario: Suppressing fast transient bursts generated by AC-DC converter switching noise coupled onto secondary-side feedback and control lines. IC Role / Device Role / Timing Role: Low-capacitance TVS placed across optocoupler input or TL431 reference pins to prevent false regulation or latch-up during line transients. Use Value: Delivers 1500 W surge immunity without adding significant parasitic capacitance, preserving loop stability and dynamic response of SMPS feedback networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC70CA-E3/9AT | Same 70 V VWM and bidirectional configuration but lower 600 W PPPM rating and higher 135 V VC at 8.9 A | Lower surge capacity suits cost-sensitive consumer applications with less severe transients | Select when system-level surge testing requires only IEC 61000-4-5 Level 2 compliance rather than full automotive load dump immunity |
| SMCJ70CAHM3_A/I | Identical electrical specs and SMC package; differs only in AEC-Q101 qualification and 13" tape delivery (I code) | Required for automotive production where component-level AEC-Q101 validation is mandated | Choose for Tier 1 automotive programs needing documented qualification evidence and traceable lot history |
Compared with SMCJ70CA-M3/9AT, SAC70CA-E3/9AT offers reduced surge margin but lower cost, while SMCJ70CAHM3_A/I adds AEC-Q101 qualification and alternate packaging - neither is pin-compatible in the sense of drop-in replacement without documentation review, but both share identical footprint and electrical interface.
Availability
SMCJ70CA-M3/9AT is available at Aetrix Electronics and suitable for automotive sensor modules, industrial motor drive I/O protection, and telecom line interface designs requiring stable component supply, halogen-free compliance, and MSL Level 1 reflow readiness.
Supply support for SMCJ70CA-M3/9AT 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 supplier of discrete semiconductors, specializing in diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, ruggedness, and application-specific optimization.
The SMCJ series is engineered for high-energy transient suppression in demanding environments - targeting automotive powertrain, industrial automation, and infrastructure equipment where robust overvoltage protection is mission-critical.
FAQ
What does the "CA" suffix indicate in SMCJ70CA-M3/9AT?
The "CA" suffix in SMCJ70CA-M3/9AT denotes a bidirectional Transient Voltage Suppressor configuration, meaning the device provides symmetrical clamping for both positive and negative voltage transients without polarity dependence. This enables use in AC-coupled circuits, differential signal lines, or ungrounded systems where transient polarity cannot be predicted - unlike unidirectional variants (e.g., SMCJ70A) which require correct cathode orientation.
How does the M3 suffix affect compliance and assembly of SMCJ70CA-M3/9AT?
The M3 suffix in SMCJ70CA-M3/9AT indicates halogen-free, RoHS-compliant construction meeting JEDEC JESD201 Class 2 whisker resistance requirements and UL 94 V-0 flammability rating. It supports lead-free reflow up to 260 °C peak temperature (MSL Level 1), making SMCJ70CA-M3/9AT compatible with standard automated SMT processes without special handling or moisture baking.
What is the maximum clamping voltage of SMCJ70CA-M3/9AT under standard test conditions?
The maximum clamping voltage (VC) of SMCJ70CA-M3/9AT is 113 V when subjected to a 10/1000 μs waveform at 13.3 A peak pulse current (IPPM), as specified in the Vishay datasheet document 88394. This value defines the upper voltage limit imposed on protected circuitry during worst-case surge events and must be verified against the absolute maximum ratings of downstream components like microcontrollers or transceivers.
Can SMCJ70CA-M3/9AT be used in place of a unidirectional TVS like SMCJ70A?
No - SMCJ70CA-M3/9AT is bidirectional and lacks polarity marking, whereas SMCJ70A is unidirectional with a cathode band. Substituting SMCJ70CA-M3/9AT for SMCJ70A may cause unintended conduction in DC-biased circuits or fail to meet design intent where directional clamping is required. Always validate circuit topology and bias conditions before interchange; SMCJ70CA-M3/9AT is not a drop-in replacement for unidirectional variants.
What thermal derating applies to SMCJ70CA-M3/9AT above 25 °C ambient temperature?
SMCJ70CA-M3/9AT exhibits linear thermal derating above 25 °C ambient: its peak pulse power (PPPM) decreases proportionally as junction temperature rises, per Figure 2 in Vishay document 88394. At 75 °C ambient, PPPM drops to approximately 1125 W (75% of 1500 W), assuming standard mounting on 8.0 mm × 8.0 mm copper pads. Derating must be applied in thermal simulations and layout reviews to ensure safe operation under worst-case ambient and power dissipation conditions.
SMCJ70CA-M3/9AT 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-M3/9AT FAQ
1.How can I place an order for SMCJ70CA-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ70CA-M3/9AT 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-M3/9AT reliable?
The price and inventory of SMCJ70CA-M3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ70CA-M3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ70CA-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ70CA-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ70CA-M3/9AT?
SMCJ70CA-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ70CA-M3/9AT 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-M3/9AT?
For technical support, including SMCJ70CA-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ70CA-M3/9AT requirements.
6.How does Aetrix verify that SMCJ70CA-M3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ70CA-M3/9AT 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-M3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ70CA-M3/9AT?
All SMCJ70CA-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ70CA-M3/9AT, 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-M3/9AT part is unused and in its original packaging.
Return procedure for SMCJ70CA-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ70CA-M3/9AT Tags
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