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Vishay General Semiconductor - Diodes Division SMCJ7.0CAHM3/I
- Part No.:
- SMCJ7.0CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ7.0CAHM3/I.pdf
- Description:
- TVS DIODE 7VWM 12VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,474
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Product details
Overview
SMCJ7.0CAHM3/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 7.0 V stand-off voltage (VWM), 1500 W peak pulse power (PPPM), clamping voltage of 12.0 V at 125 A IPPM, and operates across -55 °C to +150 °C junction temperature range - ideal for automotive sensor line protection.
For engineers reviewing the SMCJ7.0CAHM3/I datasheet, SMCJ7.0CAHM3/I pinout, SMCJ7.0CAHM3/I application, or SMCJ7.0CAHM3/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, halogen-free RoHS compliance (HM3 suffix), 12.0 V max clamping under 10/1000 μs surge, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This bidirectional TVS diode uses a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its symmetrical breakdown behavior (VBR min/max = 7.78 V / 8.60 V at IT = 10 mA) ensures consistent clamping in both polarities during ESD or lightning-induced transients.
Designed for high-reliability environments, SMCJ7.0CAHM3/I meets MSL Level 1 per J-STD-020 (260 °C peak reflow), passes JESD201 Class 2 whisker testing, and is qualified to AEC-Q101 - confirming suitability for automotive powertrain and body electronics where thermal stability and long-term surge endurance are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 7.78 V / 8.60 V at 10 mA - guaranteed symmetric breakdown threshold in both directions |
| VC @ IPPM | 12.0 V at 125 A - clamping voltage limits downstream IC stress during 10/1000 μs surge events |
| PPPM | 1500 W - peak pulse power handling capacity per single transient event |
| TJ max. | +150 °C - enables operation in under-hood automotive environments without derating |
| Package | SMC (DO-214AB) - surface-mount outline with 7.75 mm × 8.13 mm footprint and 3.20 mm height |
| Compliance | AEC-Q101 qualified, halogen-free, RoHS-compliant (HM3 suffix) |
Pinout & Package
SMCJ7.0CAHM3/I is a two-terminal bidirectional device in SMC (DO-214AB) package; no polarity marking is applied. The case is molded with UL 94 V-0 rated compound, and terminals are matte tin-plated for J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity - no fixed polarity |
| Terminal 2 | Anode/Cathode (bidirectional) | Paired terminal completing symmetrical conduction path; mounted on 8.0 mm × 8.0 mm copper pads per datasheet fig. 2 |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| AEC-Q101 qualification | Validated reliability for automotive applications including engine control units and ADAS sensor interfaces |
| Halogen-free & RoHS | HM3 suffix confirms compliance with environmental regulations and eliminates brominated flame retardants |
| Low RINC | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a/5a) |
| MSL Level 1 rating | Supports standard lead-free reflow profiles up to 260 °C peak without moisture-related failure |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, or position sensors in engine bay modules exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS clamping element placed directly at connector entry point to shunt transients before reaching signal conditioning ICs. Use Value: 12.0 V clamping voltage ensures downstream op-amps and ADCs remain within absolute maximum ratings during 100 V/50 ms load dump events. | Use Scenario: Shielding differential CAN_H/CAN_L lines in industrial gateways subjected to EFT bursts and surge coupling from adjacent motor drives. IC Role / Device Role / Timing Role: Common-mode transient suppressor installed across CAN bus pair to clamp common-mode surges while preserving differential signaling integrity. Use Value: Symmetric 7.78–8.60 V breakdown enables balanced clamping on both lines, maintaining CAN common-mode range and preventing receiver saturation. |
| Consumer Power Adapter Input | Telecom Line Card Surge Protection |
Use Scenario: Input-stage protection for universal-input AC/DC adapters against lightning-induced surges entering via mains lines. IC Role / Device Role / Timing Role: Primary-level TVS placed after fuse and before bridge rectifier to absorb line-to-line and line-to-ground transients. Use Value: 1500 W PPPM rating sustains multiple 6 kV/3 kA surges per IEC 61000-4-5 without degradation, extending adapter field life. | Use Scenario: Protecting Ethernet PHY interface circuits on telecom line cards from induced surges due to nearby lightning strikes on copper infrastructure. IC Role / Device Role / Timing Role: Secondary-level TVS deployed on RJ45 magnetics secondary side to clamp residual transients escaping primary gas discharge tube suppression. Use Value: 125 A IPPM capability handles residual 10/1000 μs surges up to 1.5 kV, ensuring PHY IC survival per GR-1089-CORE requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC7.0CA | Lower PPPM (600 W), same VWM (7.0 V), smaller SMA package | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a | Select when board space is constrained and surge energy is ≤ 600 W |
| SMCJ7.0CAHE3/I | Same electrical specs, but HE3 suffix indicates AEC-Q101 + RoHS (non-halogen-free) | No halogen-free requirement; acceptable for non-automotive industrial use | Choose when halogen-free mandate does not apply and cost optimization is prioritized |
Compared with SMCJ7.0CAHM3/I, SAC7.0CA trades surge robustness for compactness, while SMCJ7.0CAHE3/I offers identical protection performance without halogen-free compliance - making SMCJ7.0CAHM3/I the optimal choice for automotive-grade designs requiring both AEC-Q101 validation and halogen-free materials.
Availability
SMCJ7.0CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial CAN networks, consumer power adapters, and telecom line card designs requiring stable component supply with full traceability and lifecycle continuity.
Supply support for SMCJ7.0CAHM3/I 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMCJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where sustained surge immunity and AEC-Q101 validation are mandatory.
FAQ
What does the 'CA' suffix indicate in SMCJ7.0CAHM3/I?
The 'CA' suffix in SMCJ7.0CAHM3/I denotes a bidirectional configuration, meaning the device provides symmetrical transient voltage suppression in both polarities. This allows it to protect AC-coupled or floating signal paths without requiring polarity-aware layout - unlike unidirectional variants (e.g., SMCJ7.0A) which have a defined cathode band. The CA version exhibits identical VBR min/max and VC characteristics in either direction.
Is SMCJ7.0CAHM3/I suitable for automotive applications?
Yes, SMCJ7.0CAHM3/I is AEC-Q101 qualified (as indicated by the HM3 suffix), making it suitable for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. Its -55 °C to +150 °C operating range, MSL Level 1 reflow rating, and JESD201 Class 2 whisker resistance ensure reliability in under-hood and chassis-mounted environments where thermal cycling and mechanical stress are present.
How does the HM3 suffix differ from M3 or HE3 in Vishay's SMCJ series?
The HM3 suffix in SMCJ7.0CAHM3/I specifies halogen-free, RoHS-compliant, and AEC-Q101 qualified construction. In contrast, M3 denotes halogen-free + RoHS but no AEC-Q101 validation, while HE3 indicates RoHS-compliant + AEC-Q101 but contains halogens. Thus, HM3 uniquely satisfies all three requirements - critical for automotive OEMs enforcing strict material declarations and reliability standards.
What is the recommended PCB pad layout for SMCJ7.0CAHM3/I?
Vishay specifies mounting SMCJ7.0CAHM3/I on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal to achieve rated PPPM and thermal performance. Smaller pads reduce heat dissipation and cause premature thermal runaway during repetitive surges. The SMC (DO-214AB) outline requires ≥0.126" (3.20 mm) minimum standoff height and alignment with the mechanical drawing on page 5 of document 88394.
Can SMCJ7.0CAHM3/I replace SMCJ7.0A in an existing design?
No - SMCJ7.0CAHM3/I is bidirectional while SMCJ7.0A is unidirectional, so direct replacement requires circuit review. Unidirectional devices have a cathode band and conduct forward current (IFSM = 200 A); bidirectional types lack polarity marking and block current in both directions until breakdown. Swapping without adjusting layout or verifying system-level polarity behavior may result in unintended conduction or failed protection.
SMCJ7.0CAHM3/I 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):
- 7V
- Voltage - Breakdown (Min):
- 7.78V
- Voltage - Clamping (Max) @ Ipp:
- 12V
- Current - Peak Pulse (10/1000µs):
- 125A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ7.0CAHM3/I FAQ
1.How can I place an order for SMCJ7.0CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ7.0CAHM3/I 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 SMCJ7.0CAHM3/I reliable?
The price and inventory of SMCJ7.0CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ7.0CAHM3/I is usually 5 days.
3.What payment methods are accepted for SMCJ7.0CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ7.0CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ7.0CAHM3/I?
SMCJ7.0CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ7.0CAHM3/I 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 SMCJ7.0CAHM3/I?
For technical support, including SMCJ7.0CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ7.0CAHM3/I requirements.
6.How does Aetrix verify that SMCJ7.0CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMCJ7.0CAHM3/I 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 SMCJ7.0CAHM3/I meets industry standards.
7.What is the process for return or replacement of SMCJ7.0CAHM3/I?
All SMCJ7.0CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ7.0CAHM3/I, 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 SMCJ7.0CAHM3/I part is unused and in its original packaging.
Return procedure for SMCJ7.0CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ7.0CAHM3/I Tags
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