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Vishay General Semiconductor - Diodes Division SMCJ75AHE3/57T
- Part No.:
- SMCJ75AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ75AHE3/57T.pdf
- Description:
- TVS DIODE 75VWM 121VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,927
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Product details
Overview
SMCJ75AHE3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 75 V standoff voltage (VWM), 83.3–92.1 V breakdown voltage (VBR), and 1500 W peak pulse power (PPPM) at 10/1000 μs waveform. It clamps transients to ≤121 V at 12.4 A peak current and operates from –55 °C to +150 °C, commonly used to protect automotive power rails and industrial sensor interfaces.
For engineers reviewing the SMCJ75AHE3/57T datasheet, SMCJ75AHE3/57T pinout, SMCJ75AHE3/57T application, or SMCJ75AHE3/57T equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), junction capacitance (not specified for this variant but <100 pF typical at 1 MHz), and compliance with UL 497B and IEC 61000-4-2/4-5 standards.
Technical Context
This TVS diode employs an avalanche breakdown mechanism to clamp transient overvoltages within nanoseconds, delivering low clamping ratio (VC/VBR ≈ 1.31) and minimal incremental surge resistance. Its glass-passivated junction ensures stable leakage (<1 μA at 75 V) and robust reliability under repetitive surge stress.
The device is rated for 200 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), supports automated SMT placement, and meets JESD201 Class 2 whisker resistance and J-STD-020 MSL Level 1 (260 °C peak reflow). Polarity is marked by cathode band; no marking on bidirectional variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected circuitry. |
| VBR min/max | 83.3 V / 92.1 V at IT = 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on during transients. |
| VC @ IPPM | 121 V at 12.4 A - Clamped voltage under 10/1000 μs surge; determines maximum stress imposed on downstream components. |
| PPPM | 1500 W - Peak pulse power handling capability; enables protection against high-energy lightning-induced surges per IEC 61000-4-5. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood automotive and industrial environments. |
| RθJA | 75 °C/W - Thermal resistance junction-to-ambient; informs heatsinking requirements when operating near PD = 6.5 W limit. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, RoHS-compliant and halogen-free (HE3 suffix), UL 94 V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode-side connection in reverse-biased protection configuration | Connected to protected line (e.g., 12 V rail); clamps positive transients to ground via anode terminal. |
| Anode | Reference/ground return path | Typically tied to system ground or low-impedance return plane; completes clamping path during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensors requiring extended temperature and life-cycle reliability. |
| 1500 W peak pulse power | Withstands severe transient threats such as ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 Combination Wave (1.2/50 μs + 8/20 μs). |
| Low clamping voltage (121 V) | Minimizes voltage overshoot on protected ICs like CAN transceivers or microcontrollers, reducing risk of latch-up or permanent damage. |
| MSL Level 1 moisture sensitivity | Enables standard SMT reflow without baking; compatible with high-volume automated assembly lines using 260 °C peak profile. |
| Glass passivated junction | Ensures stable leakage current (<1 μA at VWM) and long-term parameter stability across humidity and thermal cycling stress. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump transients up to 120 V and 400 ms duration. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to shunt surge energy before it reaches LDOs or MCU power pins. Use Value: Limits peak voltage to ≤121 V during ISO 7637-2 Pulse 5a, preventing brownout or destruction of downstream regulators and logic circuits. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loop) in factory automation sensors exposed to motor switching noise. IC Role / Device Role / Timing Role: TVS connected across signal and return lines to clamp fast-rising EFT bursts (IEC 61000-4-4) and inductive kickback. Use Value: Maintains signal integrity by suppressing transients within <1 ns response time while adding <100 pF capacitance-negligible at DC/low-frequency outputs. |
| Telecom DC Power Input Protection | Consumer Device USB Port Protection |
|
Use Scenario: Securing -48 V telecom rectifier outputs against lightning-induced surges entering central office equipment. IC Role / Device Role / Timing Role: Primary-level TVS mounted at board edge to absorb bulk surge energy before secondary protection stages (e.g., polymer PTC + secondary TVS). Use Value: Handles 1500 W peak power per IEC 61000-4-5, enabling single-stage robustness without derating concerns in high-reliability infrastructure gear. |
Use Scenario: Adding overvoltage resilience to USB Type-A VBUS lines in portable speakers or docking stations connected to wall adapters. IC Role / Device Role / Timing Role: Unidirectional suppressor placed between VBUS and GND to block positive-going spikes from faulty chargers or hot-plug events. Use Value: Clamps 100 V transients to 121 V within nanoseconds, preserving USB PHY ICs rated for absolute max 20 V while maintaining full-speed data integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75AHE3/52T | Lower PPPM (600 W), SMB (DO-214AA) package, same VWM/VBR/temperature rating | Reduced surge margin; suitable only for lower-energy threats (e.g., ESD-only zones, not load dump) | Select when board space is constrained and surge threat level is limited to IEC 61000-4-2 ±15 kV contact discharge. |
| SMCJ75CAHE3/57T | Bidirectional version; identical VWM/VBR/PPPM but symmetrical clamping in both polarities | Required for AC-coupled or floating signal lines where negative transients occur (e.g., RS-485, CAN bus) | Choose when protecting differential buses or ungrounded analog signals needing dual-polarity clamping. |
Compared with SMCJ75AHE3/57T, SMBJ75AHE3/52T trades surge capacity for smaller footprint, while SMCJ75CAHE3/57T adds bidirectional symmetry at no power penalty-neither is pin-compatible due to differing package outlines (SMB vs. SMC), requiring PCB layout revision.
Availability
SMCJ75AHE3/57T is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor modules, telecom power supplies, and consumer USB power delivery systems requiring stable component supply and AEC-Q101 assurance.
Supply support for SMCJ75AHE3/57T 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 is engineered for high-power transient suppression in harsh environments, targeting automotive, industrial, and telecom infrastructure where robustness against lightning, load dump, and EFT is mission-critical.
FAQ
What is the clamping voltage of SMCJ75AHE3/57T at its rated peak pulse current?
The SMCJ75AHE3/57T clamps to a maximum of 121 V when subjected to its rated peak pulse current of 12.4 A under the standard 10/1000 μs waveform. This value is measured at the device terminals and represents the upper bound of voltage seen by protected circuitry during worst-case surge events, ensuring compatibility with 100 V-rated downstream components.
Is SMCJ75AHE3/57T suitable for automotive applications?
Yes, SMCJ75AHE3/57T carries AEC-Q101 qualification, confirming its suitability for automotive use cases including engine control units, body electronics, and ADAS sensors. The HE3 suffix denotes RoHS-compliance and automotive-grade screening, and its –55 °C to +150 °C operating range supports under-hood deployment.
What does the "HE3" suffix mean in SMCJ75AHE3/57T?
The "HE3" suffix in SMCJ75AHE3/57T indicates RoHS-compliant construction with AEC-Q101 qualification, distinguishing it from commercial-grade E3 variants. It also specifies halogen-free molding compound and compliance with JESD201 Class 2 whisker resistance, making it appropriate for high-reliability automotive and industrial designs.
How does SMCJ75AHE3/57T differ from SMCJ75CAHE3/57T?
SMCJ75AHE3/57T is unidirectional, with cathode marking and clamping only for positive transients relative to ground, whereas SMCJ75CAHE3/57T is bidirectional and clamps symmetrically for both polarities. Both share identical VWM (75 V), VBR (83.3–92.1 V), PPPM (1500 W), and package-but require different layout considerations due to polarity marking and usage context.
What is the thermal resistance of SMCJ75AHE3/57T, and how does it affect PCB layout?
The SMCJ75AHE3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on minimum recommended copper pads (0.31″ × 0.31″ per terminal). To maintain safe junction temperatures under sustained power dissipation, designers must provide adequate copper area and avoid excessive trace length or isolation that impedes heat conduction away from the SMC package body.
SMCJ75AHE3/57T 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):
- 75V
- Voltage - Breakdown (Min):
- 83.3V
- Voltage - Clamping (Max) @ Ipp:
- 121V
- Current - Peak Pulse (10/1000µs):
- 12.4A
- 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)
SMCJ75AHE3/57T FAQ
1.How can I place an order for SMCJ75AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ75AHE3/57T 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 SMCJ75AHE3/57T reliable?
The price and inventory of SMCJ75AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ75AHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ75AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ75AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ75AHE3/57T?
SMCJ75AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ75AHE3/57T 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 SMCJ75AHE3/57T?
For technical support, including SMCJ75AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ75AHE3/57T requirements.
6.How does Aetrix verify that SMCJ75AHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ75AHE3/57T 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 SMCJ75AHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ75AHE3/57T?
All SMCJ75AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ75AHE3/57T, 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 SMCJ75AHE3/57T part is unused and in its original packaging.
Return procedure for SMCJ75AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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