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Vishay General Semiconductor - Diodes Division SMCJ7.5-E3/57T
- Part No.:
- SMCJ7.5-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ7.5-E3/57T.pdf
- Description:
- TVS DIODE 7.5VWM 14.3VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,400
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Product details
Overview
SMCJ7.5-E3/57T 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.
For engineers reviewing the SMCJ7.5-E3/57T datasheet, SMCJ7.5-E3/57T pinout, SMCJ7.5-E3/57T application, or SMCJ7.5-E3/57T equivalent, this device is selected for high-energy surge immunity in automotive power supplies, industrial sensor interfaces, and DC-DC converter input protection where fast response (<1 ns), low clamping ratio, and AEC-Q101 qualification are required.
Technical Context
The SMCJ7.5-E3/57T operates as a silicon avalanche diode, conducting in reverse-bias when transient voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<100 µA at VWM), while the DO-214AB package provides thermal resistance of 15 °C/W (junction-to-lead) and supports 200 A non-repetitive forward surge current (IFSM).
It complies with ANSI/IEEE C62.35 for surge suppression and meets J-STD-020 MSL Level 1 with 260 °C lead-free reflow compatibility. The E3 suffix confirms RoHS compliance and JESD201 Class 1A whisker resistance; no polarity marking is present on bi-directional variants, but SMCJ7.5-E3/57T is unidirectional - cathode denoted by band.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - maximum continuous reverse operating voltage before clamping begins; sets upper limit for protected circuit's normal operating range |
| VBR @ IT=1.0 mA | 8.33–9.21 V - guaranteed avalanche initiation window; ensures predictable turn-on without premature conduction |
| VC @ IPPM=116.3 A | 12.9 V - clamped voltage during 10/1000 µs surge; limits stress on downstream ICs to safe levels |
| PPPM | 1500 W - peak pulse power handling capacity; enables protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) |
| IFSM | 200 A - single half-sine surge current rating (8.3 ms); supports protection against load dump transients in 12 V automotive systems |
| Junction Temp Range | –55 °C to +150 °C - wide operational envelope suitable for under-hood automotive and industrial environments |
| Package | DO-214AB (SMCJ) - surface-mount, low-profile case with 8.0 mm × 8.0 mm copper pad thermal design; UL 94 V-0 rated molding compound |
Pinout & Package
SMCJ7.5-E3/57T uses the DO-214AB (SMCJ) package: a two-terminal, surface-mount, J-bend leaded case with cathode indicated by a band on one end. Thermal performance relies on 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper pads per terminal per Vishay's recommended layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to circuit ground or return path; completes conduction loop during reverse transient |
| Cathode (banded end) | Protected line connection | Connected to the line being safeguarded (e.g., +12 V rail); conducts avalanche current to anode during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control units and ADAS power domains |
| 1500 W peak pulse power | Withstands 10/1000 µs surges up to 116.3 A without degradation - exceeds IEC 61000-4-5 basic insulation requirements |
| Clamping ratio VC/VBR ≈ 1.44 | Low ratio ensures minimal overvoltage overshoot during clamping - critical for protecting 5 V or 3.3 V logic interfaces downstream |
| Glass-passivated junction | Stable electrical parameters over time and temperature; eliminates risk of metallization migration under repeated surge stress |
| RoHS-compliant E3 suffix | Meets JESD201 Class 1A whisker resistance and lead-free soldering standards - compatible with modern automated SMT assembly lines |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply inputs of body control modules against load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC converter input. Use Value: Clamps 12 V rail to ≤12.9 V during 116 A surge, preventing damage to upstream regulators and microcontrollers. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loops) in factory automation sensors exposed to EMI and cable coupling. IC Role / Device Role / Timing Role: TVS mounted across signal and return lines at connector entry point. Use Value: Sub-1 ns response limits induced voltage spikes to <13 V, preserving ADC accuracy and isolator integrity. |
| DC-DC Converter Input Protection | Telecom Line Card Surge Suppression |
Use Scenario: Input-stage protection for buck converters powering FPGA or ASIC core rails in telecom infrastructure. IC Role / Device Role / Timing Role: Primary surge clamp ahead of input capacitor and controller IC. Use Value: Absorbs 1500 W pulses without derating at +85 °C ambient, maintaining system uptime during lightning-induced surges. |
Use Scenario: Secondary-level protection on -48 V DC distribution lines feeding line cards in central office switches. IC Role / Device Role / Timing Role: Unidirectional TVS tied between -48 V bus and chassis ground. Use Value: Withstands repeated 10/1000 µs surges up to 116 A while maintaining <100 µA leakage at nominal voltage. |
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 SOD-123FL package, higher VC/VBR ratio (≈1.58) | Better suited for space-constrained consumer electronics with lower surge exposure | Select SAC7.5 only if board area is critical and surge energy remains below 600 W; not AEC-Q101 qualified |
| SMCJ7.5AHE3/57T | Identical electrical specs but HE3 suffix indicates AEC-Q101 qualification and JESD201 Class 2 whisker resistance | Required for safety-critical automotive subsystems requiring extended reliability validation | Choose SMCJ7.5AHE3/57T when full AEC-Q101 test report traceability is mandated; otherwise SMCJ7.5-E3/57T suffices |
Compared with SAC7.5, SMCJ7.5-E3/57T delivers 2.5× higher surge power handling and automotive qualification; versus SMCJ7.5AHE3/57T, it shares identical clamping and thermal behavior but omits extended whisker testing - making it optimal for cost-sensitive industrial designs meeting baseline AEC-Q101 requirements.
Availability
SMCJ7.5-E3/57T is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and DC-DC converter input surge suppression requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for SMCJ7.5-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The SMCJ series was developed for high-power transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where failure due to voltage surges must be eliminated through proven avalanche ruggedness and thermal stability.
FAQ
What is the clamping voltage of SMCJ7.5-E3/57T at its rated peak pulse current?
The SMCJ7.5-E3/57T 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 guarantees that downstream components see no more than 12.9 V during surge events - critical for protecting 5 V or 3.3 V logic interfaces powered from the same rail as the SMCJ7.5-E3/57T.
Is SMCJ7.5-E3/57T suitable for automotive applications?
Yes, SMCJ7.5-E3/57T is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments. Its –55 °C to +150 °C junction temperature range, 200 A IFSM rating for load dump survival, and glass-passivated junction ensure reliability in engine control units, body electronics, and ADAS power domains - all validated per the AEC-Q101 stress test schedule documented in Vishay's qualification report for the SMCJ family.
How does the E3 suffix affect the SMCJ7.5-E3/57T specification?
The E3 suffix on SMCJ7.5-E3/57T denotes RoHS compliance and JESD201 Class 1A whisker resistance - confirming suitability for lead-free reflow soldering at 260 °C and long-term mechanical stability in vibration-prone applications. It does not alter electrical parameters; the "E3" is a material/process designation, not a performance variant. The base SMCJ7.5A electrical characteristics remain fully applicable to SMCJ7.5-E3/57T.
What is the thermal resistance of SMCJ7.5-E3/57T, and how does it impact PCB layout?
The SMCJ7.5-E3/57T has a typical junction-to-lead thermal resistance (RθJL) of 15 °C/W and junction-to-ambient (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 operation at 6.5 W continuous power dissipation, PCB layout must replicate this pad size and use internal ground/power planes for heat spreading - undersized pads will cause excessive junction temperature rise and premature failure during repetitive surges.
Can SMCJ7.5-E3/57T be used in bi-directional protection circuits?
No, SMCJ7.5-E3/57T is a unidirectional TVS diode, identifiable by its cathode band marking and part number suffix "A" (not "CA"). For bi-directional applications - such as AC signal lines or differential buses - the correct variant is SMCJ7.5CA-E3/57T, which has symmetric breakdown in both polarities and no polarity marking. Using SMCJ7.5-E3/57T in bi-directional configurations risks forward conduction and permanent damage during negative transients.
SMCJ7.5-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:
- 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-E3/57T FAQ
1.How can I place an order for SMCJ7.5-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ7.5-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 SMCJ7.5-E3/57T reliable?
The price and inventory of SMCJ7.5-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 SMCJ7.5-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ7.5-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ7.5-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ7.5-E3/57T?
SMCJ7.5-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ7.5-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 SMCJ7.5-E3/57T?
For technical support, including SMCJ7.5-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ7.5-E3/57T requirements.
6.How does Aetrix verify that SMCJ7.5-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ7.5-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 SMCJ7.5-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ7.5-E3/57T?
All SMCJ7.5-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ7.5-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 SMCJ7.5-E3/57T part is unused and in its original packaging.
Return procedure for SMCJ7.5-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ7.5-E3/57T Tags
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