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Vishay General Semiconductor - Diodes Division SMCJ7.0CAHM3/H
- Part No.:
- SMCJ7.0CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ7.0CAHM3/H.pdf
- Description:
- TVS DIODE 7VWM 12VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,896
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Product details
Overview
SMCJ7.0CAHM3/H 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 signal or power lines. It features a 7.0 V stand-off voltage (VWM), 12.0 V maximum clamping voltage (VC) at 125 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 μs waveform - used to protect automotive sensor interfaces and industrial I/O circuits.
For engineers reviewing the SMCJ7.0CAHM3/H datasheet, SMCJ7.0CAHM3/H pinout, SMCJ7.0CAHM3/H application, or SMCJ7.0CAHM3/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, and compatibility with automated SMT assembly on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ7.0CAHM3/H operates as a bidirectional avalanche diode, symmetrically clamping transient overvoltages in both polarities without polarity marking. Its breakdown voltage (VBR) ranges from 7.78 V to 8.60 V at 10 mA test current, with temperature coefficient of 0.065 %/°C - enabling stable protection across -55 °C to +150 °C junction range.
It delivers 125 A peak pulse current under standardized 10/1000 μs surge, achieving low incremental surge resistance and fast response time (<1 ns), while maintaining ≤1.0 μA reverse leakage at VWM - critical for low-power sensor line protection where standby current integrity matters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 7.78 V / 8.60 V at 10 mA - ensures reliable avalanche initiation within tight tolerance band |
| VC @ IPPM | 12.0 V at 125 A - defines worst-case clamped voltage seen by protected IC during surge |
| PPPM | 1500 W - peak transient energy absorption capacity per 10/1000 μs waveform |
| TJ max | +150 °C - enables 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 |
| Qualification | AEC-Q101 qualified, halogen-free, RoHS-compliant - meets automotive reliability and environmental requirements |
Pinout & Package
SMCJ7.0CAHM3/H uses the SMC (DO-214AB) package - a 2-terminal surface-mount device with no polarity marking for bidirectional operation. Terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | One terminal of symmetrical avalanche junction; conducts during positive overvoltage events |
| Cathode | Transient current entry (negative half-cycle) | Second terminal of symmetrical junction; conducts during negative overvoltage events - identical physical role to Anode in bidirectional configuration |
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 for automotive applications including engine control modules and ADAS sensor interfaces |
| 1500 W peak pulse rating | Withstands ISO 7637-2 Pulse 1, 2a, 3a/b and IEC 61000-4-5 surge waveforms in system-level testing |
| Low clamping ratio (VC/VWM = 1.71) | Minimizes stress on downstream ICs compared to higher-ratio TVS devices |
| Halogen-free & RoHS-compliant | Meets automotive OEM material compliance requirements and supports green manufacturing initiatives |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector or PCB edge to shunt surge energy before reaching sensitive analog front-end or communication ICs. Use Value: Maintains signal integrity during 12 V/24 V automotive transients while meeting AEC-Q101 lifetime reliability targets. | Use Scenario: Safeguarding PLC digital input modules against field-wiring induced surges from solenoid valves or motor contactors. IC Role / Device Role / Timing Role: Primary transient suppressor on 24 V DC input lines, coordinated with upstream fusing and filtering to meet IEC 61000-4-4/5 immunity requirements. Use Value: Limits clamped voltage to 12.0 V - well below typical 24 V input stage breakdown thresholds - preventing latch-up or permanent damage. |
| Consumer Power Adapter Input | Telecom Line Card Protection |
Use Scenario: Secondary-side surge suppression on 5–12 V DC outputs of wall adapters and USB PD chargers exposed to ESD and conducted noise. IC Role / Device Role / Timing Role: Final-stage protector downstream of DC-DC converters, absorbing residual transients that bypass primary Y-capacitor filtering. Use Value: Low 1.0 μA leakage at 7.0 V VWM preserves standby efficiency in energy-sensitive consumer products. | Use Scenario: Protecting Ethernet PHY interfaces and RS-485 transceivers on telecom base station line cards from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: First-line bidirectional clamp on differential pairs, working in concert with common-mode chokes and GDTs for full-spectrum surge mitigation. Use Value: Symmetrical 7.78–8.60 V VBR ensures balanced clamping on both signal polarities - essential for differential signaling integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ7.0CA | Lower PPPM (400 W), same VWM and VC, SMA package (smaller footprint, lower thermal mass) | Not suitable for high-energy surges like ISO 7637-2 Pulse 5a; limited to low-power signal lines | Select when board space is constrained and surge threat level is low (e.g., internal PCB traces only) |
| SMCJ7.0CAHE3/H | Identical electrical specs and package; differs only in lead finish (SnPb-free matte tin vs. halogen-free matte tin) and qualification (commercial vs. AEC-Q101) | Lacks automotive qualification and halogen-free certification - not approved for under-hood use | Select only for non-automotive industrial or consumer applications where AEC-Q101 is not required |
Compared with SMAJ7.0CA and SMCJ7.0CAHE3/H, the SMCJ7.0CAHM3/H uniquely combines 1500 W surge capacity, AEC-Q101 qualification, and halogen-free construction - making it the only option among the three validated for high-reliability automotive powertrain and chassis systems.
Availability
SMCJ7.0CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O interface hardening, and telecom line card surge suppression requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ7.0CAHM3/H 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, power handling, and automotive-grade qualification.
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 infrastructure applications demanding robust, standardized protection.
FAQ
What does the "CA" suffix indicate in SMCJ7.0CAHM3/H?
The "CA" suffix denotes a bidirectional configuration - meaning the SMCJ7.0CAHM3/H provides symmetrical clamping for both positive and negative voltage transients without polarity marking. This distinguishes it from unidirectional variants (e.g., SMCJ7.0AHM3/H) and makes it suitable for AC-coupled or floating signal lines where polarity reversal may occur during surge events.
Is SMCJ7.0CAHM3/H qualified for automotive use?
Yes, SMCJ7.0CAHM3/H is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction with automotive-grade reliability validation. It is approved for use in engine control units, body electronics, and ADAS sensor modules where sustained operation at +150 °C junction temperature and resistance to mechanical shock/vibration are required.
What is the maximum clamping voltage of SMCJ7.0CAHM3/H and under what conditions?
The maximum clamping voltage (VC) of SMCJ7.0CAHM3/H is 12.0 V, measured at 125 A peak pulse current (IPPM) using the standardized 10/1000 μs double-exponential surge waveform. This value represents the worst-case voltage imposed on protected circuitry during a full-rated transient event, ensuring downstream ICs see no more than 12.0 V.
How does SMCJ7.0CAHM3/H differ from SMCJ7.0A variants?
SMCJ7.0CAHM3/H is bidirectional with symmetrical clamping, whereas SMCJ7.0AHM3/H is unidirectional and features a cathode band marking. Electrically, the CA version has identical VWM (7.0 V) and VC (12.0 V), but supports reverse-polarity surges without external circuit reconfiguration - eliminating need for dual-diode arrangements in AC or differential applications.
What PCB layout guidance applies to SMCJ7.0CAHM3/H for optimal thermal and surge performance?
For optimal performance, mount SMCJ7.0CAHM3/H on minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal as specified in the Vishay datasheet. This pad area ensures adequate heat dissipation during repetitive surges and maintains the rated 1500 W PPPM. Avoid narrow traces between the device and protected node to minimize inductance and preserve clamping speed.
SMCJ7.0CAHM3/H 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/H FAQ
1.How can I place an order for SMCJ7.0CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ7.0CAHM3/H 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/H reliable?
The price and inventory of SMCJ7.0CAHM3/H 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/H is usually 5 days.
3.What payment methods are accepted for SMCJ7.0CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ7.0CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ7.0CAHM3/H?
SMCJ7.0CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ7.0CAHM3/H 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/H?
For technical support, including SMCJ7.0CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ7.0CAHM3/H requirements.
6.How does Aetrix verify that SMCJ7.0CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMCJ7.0CAHM3/H 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/H meets industry standards.
7.What is the process for return or replacement of SMCJ7.0CAHM3/H?
All SMCJ7.0CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ7.0CAHM3/H, 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/H part is unused and in its original packaging.
Return procedure for SMCJ7.0CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ7.0CAHM3/H Tags
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