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Vishay General Semiconductor - Diodes Division SMCJ7.5AHE3/57T
- Part No.:
- SMCJ7.5AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ7.5AHE3/57T.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,206
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Product details
Overview
SMCJ7.5AHE3/57T from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients on power and signal lines. It features a 7.5 V stand-off voltage (VWM), 8.33–9.21 V breakdown voltage (VBR) at 1.0 mA test current, 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 - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the SMCJ7.5AHE3/57T datasheet, SMCJ7.5AHE3/57T pinout, SMCJ7.5AHE3/57T application, or SMCJ7.5AHE3/57T equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, 12.9 V clamping performance under 116.3 A surge, thermal resistance (RθJA = 75 °C/W), and compatibility with automated SMT assembly on 8.0 mm × 8.0 mm copper pads.
Technical Context
This TVS diode operates as a fast-acting shunt protector that enters avalanche conduction when reverse voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable leakage (<100 μA at VWM) and low incremental surge resistance, enabling consistent clamping during repetitive transients induced by inductive switching or ESD events.
The device is rated for -55 °C to +150 °C operating junction temperature, meets MSL Level 1 per J-STD-020 (260 °C peak reflow), and supports automotive-grade reliability via AEC-Q101 qualification - confirmed by HE3 suffix and Vishay's documentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - maximum continuous reverse working voltage before clamping begins |
| VBR min/max | 8.33 V / 9.21 V at 1.0 mA - guaranteed avalanche initiation range under standardized test conditions |
| VC @ IPPM | 12.9 V at 116.3 A - maximum clamped voltage during 10/1000 μs surge, defining worst-case overvoltage seen by protected circuit |
| PPPM | 1500 W - peak transient power handling capability, critical for IEC 61000-4-5 surge immunity compliance |
| ID @ VWM | ≤100 μA - low leakage ensures minimal standby power loss and signal integrity in high-impedance circuits |
| TJ max | +150 °C - enables operation in under-hood automotive environments and thermally constrained industrial enclosures |
| RθJA | 75 °C/W - thermal resistance from junction to ambient, used to calculate safe power derating above 25 °C ambient |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, RoHS-compliant and AEC-Q101 qualified (HE3 suffix). Cathode indicated by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference | Connected to lower-potential side of protected line; defines polarity for unidirectional clamping |
| Cathode | Avalanche conduction terminal | Banded end; connected to higher-potential side (e.g., VBUS or signal line); conducts surge current to ground path |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics use including engine control units and ADAS sensor interfaces |
| 1500 W peak pulse power | Supports Level 4 IEC 61000-4-5 surge immunity (4 kV line-to-earth, 2 kV line-to-line) |
| 12.9 V clamping voltage | Limits downstream IC stress to safe levels during 116.3 A transient events on 12 V systems |
| MSL Level 1 rating | Enables standard SMT reflow without moisture sensitivity concerns or baking requirements |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity exposure |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between VBAT and chassis ground to clamp surges above 12.9 V. Use Value: Prevents latch-up or permanent damage to microcontrollers and CAN transceivers during ISO 7637-2 Pulse 5a events. | Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loops) in PLC modules from field-induced surges. IC Role / Device Role / Timing Role: TVS mounted across signal and return paths to divert fast transients before reaching precision DACs or op-amps. Use Value: Maintains measurement accuracy by limiting voltage excursion to ≤12.9 V during 1 kV/μs EFT bursts per IEC 61000-4-4. |
| Consumer DC Power Adapter Input | Telecom Line Card Surge Protection |
Use Scenario: Input-stage protection for USB-C PD adapters subjected to lightning-induced surges on AC-DC front-end rails. IC Role / Device Role / Timing Role: Primary clamping device on secondary-side 5–20 V bus, coordinated with upstream MOVs and fuses. Use Value: Absorbs up to 1500 W transient energy without degradation, preserving adapter MTBF under repeated surge stress. | Use Scenario: Secondary-side protection on Ethernet PHY power rails (e.g., 3.3 V, 5 V) in PoE-powered switches. IC Role / Device Role / Timing Role: Fast-response TVS suppressing fast-rising transients from cable coupling or hot-swap events. Use Value: Clamps within <1 ns to prevent PHY IC reset or data corruption during IEEE 802.3af/at surge tests. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ7.5A-E3/57T | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (110 °C/W) | Suitable for lower-energy transients; not recommended for ISO 7637-2 Pulse 5a or IEC 61000-4-5 Level 4 | Select when board space is constrained and surge threat level is limited to IEC 61000-4-2/4-4 only. |
| SMCJ7.5A-M3/57T | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification | No functional difference; used where halogen-free material compliance is mandated (e.g., EU automotive Tier 1) | Choose for green manufacturing programs without compromising protection performance or reliability. |
Compared with SMCJ7.5AHE3/57T, SMAJ7.5A-E3/57T offers reduced surge capacity in a smaller footprint, while SMCJ7.5A-M3/57T delivers identical protection with halogen-free construction - enabling direct substitution where environmental compliance drives material selection.
Availability
SMCJ7.5AHE3/57T is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, consumer power adapters, and telecom line cards requiring stable component supply with AEC-Q101 assurance and full traceability.
Supply support for SMCJ7.5AHE3/57T 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 is a global leader in discrete semiconductors, specializing in diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific design.
The SMCJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where robustness against load dump, EFT, and lightning surges is mandatory.
FAQ
What is the clamping voltage of the SMCJ7.5AHE3/57T under maximum surge conditions?
The SMCJ7.5AHE3/57T has a maximum clamping voltage (VC) of 12.9 V when subjected to its rated peak pulse current of 116.3 A using a 10/1000 μs waveform. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during worst-case transient events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is the SMCJ7.5AHE3/57T qualified for automotive applications?
Yes, the SMCJ7.5AHE3/57T carries the HE3 suffix, confirming it is RoHS-compliant and AEC-Q101 qualified per Vishay's official documentation. This qualification validates its suitability for automotive powertrain, body electronics, and ADAS systems where extended temperature operation (-55 °C to +150 °C) and reliability under thermal cycling and vibration are required.
How does the SMCJ7.5AHE3/57T differ from bidirectional variants like SMCJ7.5CA?
The SMCJ7.5AHE3/57T is unidirectional, with polarity marked by a cathode band and intended for DC line protection where reverse voltage is blocked. In contrast, SMCJ7.5CA is bidirectional, symmetric in both directions, and used in AC-coupled or floating signal lines. Their VBR, VC, and PPPM values are identical, but circuit integration and layout routing differ significantly due to polarity constraints.
What is the thermal resistance of the SMCJ7.5AHE3/57T, and how does it affect PCB layout?
The SMCJ7.5AHE3/57T 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. To maintain safe junction temperature under sustained power dissipation, designers must allocate adequate copper area and avoid excessive trace length - especially important in automotive applications where ambient temperatures exceed 85 °C.
Can the SMCJ7.5AHE3/57T be used in place of SMAJ7.5A-E3/57T?
No - while both suppress transients at ~7.5 V, the SMCJ7.5AHE3/57T delivers 1500 W peak pulse power versus 400 W for SMAJ7.5A-E3/57T. Substituting without redesign risks catastrophic failure during high-energy surges such as ISO 7637-2 Pulse 5a. The SMCJ7.5AHE3/57T also uses a larger SMC package (DO-214AB) versus SMA (DO-214AC), requiring PCB footprint revision.
SMCJ7.5AHE3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- 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)
SMCJ7.5AHE3/57T FAQ
1.How can I place an order for SMCJ7.5AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ7.5AHE3/57T 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 SMCJ7.5AHE3/57T reliable?
The price and inventory of SMCJ7.5AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ7.5AHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ7.5AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ7.5AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ7.5AHE3/57T?
SMCJ7.5AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ7.5AHE3/57T 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 SMCJ7.5AHE3/57T?
For technical support, including SMCJ7.5AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ7.5AHE3/57T requirements.
6.How does Aetrix verify that SMCJ7.5AHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ7.5AHE3/57T 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 SMCJ7.5AHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ7.5AHE3/57T?
All SMCJ7.5AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ7.5AHE3/57T, 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 SMCJ7.5AHE3/57T part is unused and in its original packaging.
Return procedure for SMCJ7.5AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ7.5AHE3/57T Tags
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