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Vishay General Semiconductor - Diodes Division SMCJ7.5-E3/9AT
- Part No.:
- SMCJ7.5-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ7.5-E3/9AT.pdf
- Description:
- TVS DIODE 7.5VWM 14.3VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,045
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Product details
Overview
SMCJ7.5-E3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) package, designed for robust overvoltage protection of DC power rails 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, 12.9 V clamping voltage (VC) at 116.3 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive power supply inputs and industrial sensor interfaces.
For engineers reviewing the SMCJ7.5-E3/9AT datasheet, SMCJ7.5-E3/9AT pinout, SMCJ7.5-E3/9AT application, or SMCJ7.5-E3/9AT equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, RoHS-compliant matte tin plating, MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This TVS diode operates as a clamping device that remains non-conductive below VWM = 7.5 V and rapidly transitions to low-impedance conduction above VBR (min 8.33 V), limiting transient-induced voltage excursions to ≤12.9 V at 116.3 A. Its glass-passivated junction ensures stable leakage performance and fast response time (<1 ns).
Thermal design relies on RθJA = 75 °C/W (typ.) and RθJL = 15 °C/W (typ.), with derating applied above TA = 25 °C per Figure 2. The device supports surge immunity up to IFSM = 200 A (8.3 ms half-sine) and operates across TJ = –55 °C to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 8.33 V / 9.21 V at 1.0 mA - Ensures reliable turn-on margin above VWM with tight tolerance |
| VC @ IPPM | 12.9 V at 116.3 A - Clamped voltage during 10/1000 µs surge, defining protected circuit stress level |
| PPPM | 1500 W - Peak transient energy handling capability under standardized waveform |
| IPPM | 116.3 A - Maximum non-repetitive surge current the device safely clamps without failure |
| TJ range | –55 °C to +150 °C - Enables use in under-hood automotive and industrial environments |
| Leakage ID | 100 µA max at VWM - Low standby current preserves system efficiency in always-on circuits |
Pinout & Package
Package: DO-214AB (SMCJ), surface-mount, low-profile case with cathode band marking. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102. Polarity indicated by cathode band at one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry (for uni-directional operation) | Connected to protected line side; conducts only during reverse transients when cathode is positive relative to anode |
| Cathode | Reverse-biased terminal (marked with band) | Connected to ground or common reference; defines clamping direction and polarity sensitivity |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics |
| Glass passivated junction | Enhances long-term reliability and stability of VBR and leakage under thermal cycling |
| MSL Level 1 (260 °C peak) | Enables standard reflow soldering without pre-baking or special handling |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a) |
| RoHS-compliant (E3 suffix) | Meets EU Directive 2011/65/EU; matte tin plating eliminates lead and whisker risk (JESD 201 Class 1A) |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: 12 V battery-fed ECUs exposed to load dump (ISO 16750-2) and alternator switching transients. IC Role / Device Role / Timing Role: Primary clamping element placed between input rail and chassis ground, absorbing >100 A surges within nanoseconds. Use Value: Limits voltage seen by downstream LDOs and microcontrollers to ≤12.9 V, preventing latch-up or permanent damage. | Use Scenario: Analog output lines (e.g., 4–20 mA current loop) from pressure/temperature sensors in factory automation. IC Role / Device Role / Timing Role: Bidirectional protection not applicable; SMCJ7.5-E3/9AT used unidirectionally to clamp negative-going ESD or inductive kickback on signal return path. Use Value: Maintains signal integrity by suppressing transients while adding <100 µA leakage at 7.5 V, avoiding offset errors in precision measurement. |
| Consumer USB Power Port Protection | Telecom DC Feeder Line Protection |
Use Scenario: 5 V USB charging ports in portable medical devices subjected to human-body-model (HBM) ESD events. IC Role / Device Role / Timing Role: Standoff-rated TVS placed between VBUS and GND, triggered only during overvoltage events exceeding 7.5 V. Use Value: Responds in <1 ns to ±8 kV HBM strikes, clamping to 12.9 V and dissipating 1500 W peak without degradation over 1000+ events. | Use Scenario: –48 V DC power feeders in telecom base station cabinets vulnerable to lightning-induced surges. IC Role / Device Role / Timing Role: Unidirectional configuration protects negative rail; cathode tied to –48 V, anode to ground - clamps positive transients toward ground. Use Value: Withstands repeated 10/1000 µs surges up to 116.3 A, enabling compliance with ITU-T K.20/21 immunity standards. |
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-E3/61T | Lower PPPM (400 W), smaller DO-214AC (SMA) package, same VWM/VBR range | Not suitable for 1500 W surge requirements; limited to lower-energy transients (e.g., IEC 61000-4-2 ESD) | Select when space-constrained PCB layout prioritizes footprint over high-energy clamping |
| SMCJ7.5AHE3/9AT | Identical electrical specs but AEC-Q101 qualified (HE3 suffix); same DO-214AB package and E3 plating | Required for automotive production; SMCJ7.5-E3/9AT is commercial-grade (non-AEC-Q101) | Choose SMCJ7.5AHE3/9AT for Tier-1 automotive designs; SMCJ7.5-E3/9AT suffices for industrial/commercial use |
Compared with SMAJ7.5A-E3/61T, SMCJ7.5-E3/9AT delivers 3.75× higher surge power handling in a larger but thermally superior package; versus SMCJ7.5AHE3/9AT, it offers identical performance without AEC-Q101 certification - reducing cost where automotive qualification is unnecessary.
Availability
SMCJ7.5-E3/9AT is available at Aetrix Electronics and suitable for automotive power inputs, industrial sensor interfaces, consumer USB port protection, and telecom DC feeder lines requiring stable component supply across high-volume production cycles.
Supply support for SMCJ7.5-E3/9AT 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, automotive qualification, and high-power handling.
The SMCJ series was developed specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where robustness against ISO 7637, IEC 61000-4-5, and lightning-induced surges is mandatory.
FAQ
What is the clamping voltage of the SMCJ7.5-E3/9AT under maximum rated surge current?
The SMCJ7.5-E3/9AT has a maximum clamping voltage (VC) of 12.9 V when subjected to its rated peak pulse current (IPPM) of 116.3 A using a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during worst-case transient events. The SMCJ7.5-E3/9AT maintains this clamping performance across its full operating temperature range.
Is the SMCJ7.5-E3/9AT suitable for automotive applications?
The SMCJ7.5-E3/9AT is RoHS-compliant and manufactured in an AEC-Q101-qualified facility, but the E3 suffix denotes commercial-grade qualification - not full AEC-Q101 certification. For production automotive use, Vishay specifies the HE3-suffix variant (e.g., SMCJ7.5AHE3/9AT). The SMCJ7.5-E3/9AT is appropriate for industrial and consumer applications where AEC-Q101 is not mandated.
What does the "9AT" in SMCJ7.5-E3/9AT indicate?
The "9AT" suffix identifies the packaging configuration: 13-inch diameter plastic tape and reel, with a base quantity of 3500 units per reel. This format is optimized for high-speed SMT pick-and-place equipment. The "E3" portion confirms RoHS compliance and matte tin plating meeting JESD 201 Class 1A whisker resistance requirements. The SMCJ7.5-E3/9AT is not a different electrical variant - all performance parameters match the base SMCJ7.5A specification.
How does the SMCJ7.5-E3/9AT differ from bi-directional SMCJ7.5CA variants?
The SMCJ7.5-E3/9AT is unidirectional, with polarity marked by a cathode band and intended for DC rail protection where transients occur primarily in one polarity. Bi-directional variants like SMCJ7.5CA have no polarity marking and clamp symmetrically for AC or floating-line applications. The SMCJ7.5-E3/9AT exhibits forward voltage drop (~3.5 V at 100 A) and higher IFSM (200 A), whereas SMCJ7.5CA lacks forward conduction capability and has lower surge ratings.
What thermal considerations apply when mounting the SMCJ7.5-E3/9AT?
The SMCJ7.5-E3/9AT requires minimum 8.0 mm × 8.0 mm copper pads per terminal for rated power dissipation, per Vishay's test condition. Its typical junction-to-ambient thermal resistance (RθJA) is 75 °C/W, so at 6.5 W steady-state dissipation, junction temperature rise exceeds safe limits - confirming it is intended for transient-only duty. Continuous power handling relies on PCB copper area and airflow; derating curves (Figure 2) must be applied above TA = 25 °C. The SMCJ7.5-E3/9AT achieves optimal thermal performance when mounted per recommended pad layout.
SMCJ7.5-E3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 14.3V
- Current - Peak Pulse (10/1000µs):
- 104.9A
- 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 (SMCJ)
SMCJ7.5-E3/9AT FAQ
1.How can I place an order for SMCJ7.5-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ7.5-E3/9AT 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 SMCJ7.5-E3/9AT reliable?
The price and inventory of SMCJ7.5-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ7.5-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ7.5-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ7.5-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ7.5-E3/9AT?
SMCJ7.5-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ7.5-E3/9AT 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 SMCJ7.5-E3/9AT?
For technical support, including SMCJ7.5-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ7.5-E3/9AT requirements.
6.How does Aetrix verify that SMCJ7.5-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ7.5-E3/9AT 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 SMCJ7.5-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ7.5-E3/9AT?
All SMCJ7.5-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ7.5-E3/9AT, 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 SMCJ7.5-E3/9AT part is unused and in its original packaging.
Return procedure for SMCJ7.5-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ7.5-E3/9AT Tags
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