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Vishay General Semiconductor - Diodes Division SMCJ7.5A-E3/57T
- Part No.:
- SMCJ7.5A-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ7.5A-E3/57T.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:855
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Product details
Overview
SMCJ7.5A-E3/57T 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 SMCJ7.5A-E3/57T datasheet, SMCJ7.5A-E3/57T pinout, SMCJ7.5A-E3/57T application, or SMCJ7.5A-E3/57T equivalent, key selection criteria include unidirectional polarity, 12.9 V clamping under 116.3 A surge, RoHS-compliant matte tin terminals, MSL Level 1 rating, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This TVS diode operates as a fast-acting shunt clamp, responding in <1 ps to transient overvoltages induced by inductive switching or ESD events. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance, while the unidirectional configuration provides forward conduction path only during reverse overvoltage conditions.
The device is rated for -55 °C to +150 °C operating junction temperature, with thermal resistance of 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-lead). It meets UL 497B recognition (QVGQ2) and is qualified to AEC-Q101 when ordered with HE3 suffix - though SMCJ7.5A-E3/57T itself is commercial-grade RoHS-compliant per JESD201 Class 2 whisker test.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected circuitry. |
| VBR min/max | 8.33 V / 9.21 V at IT = 1.0 mA - guaranteed breakdown onset window; ensures predictable clamping threshold across production lots. |
| VC @ IPPM | 12.9 V at 116.3 A - maximum clamped voltage during 10/1000 µs surge; determines worst-case overvoltage seen by downstream components. |
| PPPM | 1500 W - peak pulse power handling capability; enables protection against high-energy transients like ISO 7637-2 Pulse 1/2a/5a in automotive systems. |
| ID @ VWM | 100 µA - reverse leakage at stand-off voltage; low enough to avoid loading sensitive analog or low-power control circuits. |
| TJ max | +150 °C - maximum junction temperature; supports operation in under-hood automotive or enclosed industrial environments. |
| Package | SMC (DO-214AB) - standardized surface-mount outline with 0.320" body length and cathode band marking; compatible with standard SMT reflow profiles. |
Pinout & Package
SMCJ7.5A-E3/57T uses the SMC (DO-214AB) package: molded epoxy case with matte tin-plated leads, 0.320" (8.13 mm) maximum body length, cathode indicated by a band on one end. Terminals are solderable per J-STD-002 and JESD22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient voltage clamp output node | Connected to protected line; conducts during reverse overvoltage to shunt surge current to ground. |
| Anode | Reference/return node | Typically tied to system ground or low-impedance return path; completes clamping loop during transient event. |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMC package | Enables high-density PCB layouts and compatibility with automated pick-and-place equipment without height interference. |
| Glass-passivated junction | Ensures long-term stability of VBR and low leakage drift over temperature and lifetime, critical for mission-critical protection. |
| 1500 W peak pulse power | Withstands high-energy transients such as load dump (ISO 16750-2) and inductive kickback in 12 V/24 V automotive subsystems. |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow without pre-baking, reducing manufacturing complexity and cost. |
| UL 497B recognized (QVGQ2) | Validates suitability for telecom and industrial surge protection applications requiring third-party safety certification. |
Applications
| Automotive Power Supply Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V power rails feeding ECUs, body controllers, or lighting modules from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between VBAT and GND, clamping surges above 7.5 V within nanoseconds. Use Value: Limits voltage to ≤12.9 V during 116.3 A transients, preventing damage to downstream DC/DC converters and microcontrollers. |
Use Scenario: Safeguarding analog outputs (e.g., 4–20 mA loops) and digital I/O lines of pressure/temperature sensors in factory automation. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to divert ESD and cable discharge events before reaching signal conditioning circuitry. Use Value: 100 µA leakage at 7.5 V avoids offset errors in precision sensor front-ends while clamping 8 kV HBM ESD pulses. |
| Consumer Power Adapter Input Protection | Telecom Line Card Surge Protection |
Use Scenario: Input-stage protection for AC/DC adapters and USB PD chargers against surges from mains coupling or hot-plug events. IC Role / Device Role / Timing Role: Primary-side TVS on DC input rail, coordinated with fuse and MOV for multi-level overvoltage defense. Use Value: 1500 W PPPM handles repetitive surges per IEC 61000-4-5 Level 3 (1 kV/2 Ω), extending adapter field life. |
Use Scenario: Secondary-side protection on Ethernet PHY or RS-485 transceiver lines exposed to lightning-induced surges in outdoor base stations. IC Role / Device Role / Timing Role: Unidirectional clamp on VCC or data line, referenced to local ground plane to suppress common-mode transients. Use Value: 12.9 V clamping ensures transceivers remain within absolute maximum ratings during 10/700 µs telecom surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC7.5 | Lower PPPM (600 W), smaller SMA package, higher VC (13.4 V at 50 A) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a or load dump. | Select when board space is constrained and surge energy is ≤600 W. |
| SMCJ7.5CA-E3/57T | Bidirectional variant; same VWM (7.5 V), symmetric clamping in both polarities; ID doubled to 200 µA. | Required for AC-coupled or floating signal lines where polarity reversal may occur (e.g., audio, differential pairs). | Choose bidirectional version only if protected line lacks defined DC bias or experiences bipolar transients. |
Compared with SAC7.5 and SMCJ7.5CA-E3/57T, the SMCJ7.5A-E3/57T delivers 2.5× higher surge power handling and tighter clamping than the SMA alternative, while offering unidirectional optimization for DC power rails - making it preferred for automotive and industrial 12 V supply protection where polarity is fixed and energy levels are high.
Availability
SMCJ7.5A-E3/57T is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface design, and consumer power adapter development requiring stable component supply, full traceability, and consistent RoHS compliance.
Supply support for SMCJ7.5A-E3/57T 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 performance.
The SMCJ series was developed for robust, high-power transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where failure due to voltage surges must be prevented without compromising size or manufacturability.
FAQ
What is the clamping voltage of SMCJ7.5A-E3/57T under maximum rated surge current?
The SMCJ7.5A-E3/57T has a maximum clamping voltage (VC) of 12.9 V when subjected to its peak pulse current (IPPM) of 116.3 A using a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and represents the worst-case voltage imposed on protected circuitry during a full-rated transient event. The SMCJ7.5A-E3/57T maintains this clamping performance across its specified operating temperature range.
Is SMCJ7.5A-E3/57T suitable for automotive applications requiring AEC-Q101 qualification?
No - SMCJ7.5A-E3/57T carries the E3 suffix, indicating RoHS-compliant commercial-grade qualification only. For AEC-Q101 qualification, the correct part is SMCJ7.5AHE3_A/H or SMCJ7.5AHM3_A/H, which include "HE3" or "HM3" in the ordering code. The SMCJ7.5A-E3/57T does not meet automotive stress test requirements and should not be used in safety-critical vehicle subsystems unless fully requalified.
How does the SMCJ7.5A-E3/57T differ from bidirectional SMCJ7.5CA-E3/57T in circuit implementation?
The SMCJ7.5A-E3/57T is unidirectional and must be oriented with its cathode toward the positive rail to function correctly; it blocks forward current but clamps reverse overvoltages. In contrast, SMCJ7.5CA-E3/57T is bidirectional and symmetrical - no polarity marking, identical clamping in both directions. The SMCJ7.5A-E3/57T is used on DC lines with known polarity, whereas the CA version suits AC or floating nodes. Both share identical package and thermal specs.
What is the recommended PCB pad layout for optimal thermal and surge performance of SMCJ7.5A-E3/57T?
Vishay specifies a minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pad area per terminal for SMCJ7.5A-E3/57T to achieve rated 1500 W PPPM and 75 °C/W RθJA. Use internal ground/power planes connected via multiple thermal vias under each pad. Avoid narrow traces between the SMCJ7.5A-E3/57T and protected IC - keep paths short and low-inductance to preserve clamping speed and effectiveness.
Does SMCJ7.5A-E3/57T require derating at elevated ambient temperatures?
Yes - the SMCJ7.5A-E3/57T must be derated above TA = 25 °C per Figure 2 in the datasheet. At 70 °C ambient, its peak pulse power drops to ~85 % of 1500 W (≈1275 W), and at 100 °C, it falls to ~55 % (≈825 W). Derating applies to both single-pulse and repetitive surge conditions. Always verify thermal margin using the SMCJ7.5A-E3/57T's RθJA = 75 °C/W and actual board layout before final design sign-off.
SMCJ7.5A-E3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ7.5A-E3/57T FAQ
1.How can I place an order for SMCJ7.5A-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ7.5A-E3/57T 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 SMCJ7.5A-E3/57T reliable?
The price and inventory of SMCJ7.5A-E3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ7.5A-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ7.5A-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ7.5A-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ7.5A-E3/57T?
SMCJ7.5A-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ7.5A-E3/57T 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 SMCJ7.5A-E3/57T?
For technical support, including SMCJ7.5A-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ7.5A-E3/57T requirements.
6.How does Aetrix verify that SMCJ7.5A-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ7.5A-E3/57T 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 SMCJ7.5A-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ7.5A-E3/57T?
All SMCJ7.5A-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ7.5A-E3/57T, 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 SMCJ7.5A-E3/57T part is unused and in its original packaging.
Return procedure for SMCJ7.5A-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ7.5A-E3/57T Tags
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