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Vishay General Semiconductor - Diodes Division SMCJ7.5CAHE3/9AT
- Part No.:
- SMCJ7.5CAHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ7.5CAHE3/9AT.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,300
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Product details
Overview
SMCJ7.5CAHE3/9AT 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 7.5 V stand-off voltage (VWM), 12.9 V maximum clamping voltage (VC) at 116.3 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed on power rails and signal lines in automotive ECUs and industrial sensor interfaces.
For engineers reviewing the SMCJ7.5CAHE3/9AT datasheet, SMCJ7.5CAHE3/9AT pinout, SMCJ7.5CAHE3/9AT application, or SMCJ7.5CAHE3/9AT equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification status, SMC package thermal performance (RθJA = 75 °C/W), and compliance with UL 497B for surge protector classification.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, responding within picoseconds to transients induced by inductive switching or ESD. Its glass-passivated junction ensures stable breakdown behavior, while bidirectional symmetry enables use on AC-coupled or floating signal paths without polarity concerns.
The device is rated for -55 °C to +150 °C operating junction temperature, meets MSL Level 1 per J-STD-020, and supports lead-free reflow up to 260 °C peak. Its 0.067 %/°C temperature coefficient of VBR ensures predictable voltage drift across thermal environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse working voltage before clamping initiates |
| VBR min/max | 8.33 V / 9.21 V at 1.0 mA IT - Verified breakdown threshold range under standardized test conditions |
| VC @ IPPM | 12.9 V at 116.3 A - Clamped voltage during 1500 W transient, defining worst-case stress on downstream circuitry |
| PPPM | 1500 W - Peak pulse power handling capability with 10/1000 µs waveform, critical for IEC 61000-4-5 compliance margin |
| TJ max | +150 °C - Maximum junction temperature enabling operation in under-hood automotive environments |
| RθJA | 75 °C/W - Thermal resistance from junction to ambient on standard 8 mm × 8 mm copper pads, guiding heatsinking requirements |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including HTOL, TC, and ESD testing per AEC specification |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 7.75 mm × 6.22 mm × 2.62 mm (L × W × H); matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward conduction mode | One terminal of symmetrical PN junction; functions identically as cathode during reverse transient |
| Cathode | Current exit point in forward conduction mode | Second terminal of symmetrical PN junction; functions identically as anode during reverse transient |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC or floating nodes without external polarity management or series components |
| AEC-Q101 qualification | Validates suitability for automotive powertrain and body electronics where field reliability is non-negotiable |
| UL 497B recognition (QVGQ2) | Confirms compliance with safety standards for telecom and industrial surge protector applications |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving protection margin for 3.3 V and 5 V ICs |
| MSL Level 1 rating | Permits unlimited floor life and standard reflow without baking, simplifying SMT manufacturing flow |
Applications
| Automotive Power Supply Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontroller power inputs in engine control units against load dump and jump-start surges. IC Role / Device Role / Timing Role: Shunt-type transient voltage suppressor placed directly across input rail to clamp spikes above 12 V. Use Value: Limits rail voltage to ≤12.9 V during 1500 W transients, preventing damage to 16 V-rated LDOs and MCU IO cells. | Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loop) from ESD and cable discharge events in factory automation sensors. IC Role / Device Role / Timing Role: Bidirectional TVS placed differential-mode across signal pair to absorb ±8 kV contact ESD per IEC 61000-4-2. Use Value: Maintains signal integrity below 12.9 V clamping level, avoiding saturation of op-amps and ADC front-ends. |
| Telecom Interface Protection | Consumer USB Port Surge Suppression |
Use Scenario: Shielding RS-485 transceiver pins in base station backhaul modules from lightning-induced surges on long-distance twisted-pair lines. IC Role / Device Role / Timing Role: Bidirectional TVS connected between differential data lines and ground to suppress common-mode transients. Use Value: Withstands 10/1000 µs surges up to 1500 W while maintaining <1 pF junction capacitance at zero bias, preserving signal rise time. | Use Scenario: Adding secondary-level surge immunity to USB 2.0 VBUS and D+/D− lines in smart home hubs exposed to user-handled cables. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed on each line to clamp ESD and hot-plug overshoot without degrading 480 Mbps signaling. Use Value: Delivers 12.9 V clamping at 116.3 A while meeting USB-IF ESD immunity requirements without signal distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC7.5CA | Lower PPPM (600 W), same VWM (7.5 V), smaller SMA package (DO-214AC) | Not AEC-Q101 qualified; limited to commercial-grade consumer/industrial use | Select when board space is constrained and automotive qualification is unnecessary |
| SMCJ7.5AHE3/9AT | Unidirectional version; identical VWM, VC, and PPPM but requires polarity-aware layout | Only suitable for DC-biased rails with defined ground reference; cannot protect AC or floating nodes | Choose only if system architecture guarantees unidirectional transient polarity and layout allows cathode orientation |
Compared with SAC7.5CA and SMCJ7.5AHE3/9AT, the SMCJ7.5CAHE3/9AT uniquely combines automotive qualification, bidirectional symmetry, and 1500 W surge capacity in the robust SMC package - making it the sole option for AEC-compliant, polarity-agnostic protection in high-energy environments.
Availability
SMCJ7.5CAHE3/9AT is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom infrastructure equipment requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ7.5CAHE3/9AT 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 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 systems where failure due to voltage surges must be eliminated.
FAQ
What does the "CA" suffix indicate in SMCJ7.5CAHE3/9AT?
The "CA" suffix denotes a bidirectional configuration: the SMCJ7.5CAHE3/9AT provides symmetrical clamping in both polarities, enabling use on AC-coupled, floating, or differential signal paths without polarity constraints. This differs from unidirectional variants like SMCJ7.5AHE3/9AT, which require correct cathode orientation relative to ground.
Is SMCJ7.5CAHE3/9AT qualified for automotive applications?
Yes, SMCJ7.5CAHE3/9AT is AEC-Q101 qualified, as confirmed by Vishay's documentation and ordering code suffix "HE3". This qualification covers stress tests including high-temperature operating life, temperature cycling, and ESD, validating its use in automotive powertrain, body, and chassis electronics.
What is the maximum clamping voltage of SMCJ7.5CAHE3/9AT under surge conditions?
The SMCJ7.5CAHE3/9AT has a maximum clamping voltage (VC) of 12.9 V at 116.3 A peak pulse current (IPPM) using the 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during worst-case transient events.
Does SMCJ7.5CAHE3/9AT meet UL safety standards?
Yes, SMCJ7.5CAHE3/9AT carries Underwriters Laboratories recognition under UL 497B (file E136766) for surge protector classification, confirming compliance with safety requirements for telecom and industrial interface protection applications.
What is the thermal resistance of SMCJ7.5CAHE3/9AT, and how does it affect PCB layout?
The SMCJ7.5CAHE3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. To maintain TJ ≤ 150 °C under full 1500 W surge duty, designers must ensure adequate copper area and avoid excessive ambient temperature buildup near the device.
SMCJ7.5CAHE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 12.9V
- Current - Peak Pulse (10/1000µs):
- 116.3A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ7.5CAHE3/9AT FAQ
1.How can I place an order for SMCJ7.5CAHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ7.5CAHE3/9AT 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 SMCJ7.5CAHE3/9AT reliable?
The price and inventory of SMCJ7.5CAHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ7.5CAHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ7.5CAHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ7.5CAHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ7.5CAHE3/9AT?
SMCJ7.5CAHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ7.5CAHE3/9AT 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 SMCJ7.5CAHE3/9AT?
For technical support, including SMCJ7.5CAHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ7.5CAHE3/9AT requirements.
6.How does Aetrix verify that SMCJ7.5CAHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ7.5CAHE3/9AT 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 SMCJ7.5CAHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ7.5CAHE3/9AT?
All SMCJ7.5CAHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ7.5CAHE3/9AT, 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 SMCJ7.5CAHE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ7.5CAHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ7.5CAHE3/9AT Tags
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