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Vishay General Semiconductor - Diodes Division SMCJ75AHE3/9AT
- Part No.:
- SMCJ75AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ75AHE3/9AT.pdf
- Description:
- TVS DIODE 75VWM 121VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,316
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Product details
Overview
SMCJ75AHE3/9AT 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. It features a 75 V standoff voltage (VWM), 83.3–92.1 V breakdown voltage (VBR) at 1 mA, 12.4 A peak pulse current (IPPM) under 10/1000 µs waveform, and clamps transients to ≤121 V at rated surge. It is AEC-Q101 qualified and used to protect MOSFETs, ICs, and sensor signal lines in automotive power systems.
For engineers reviewing the SMCJ75AHE3/9AT datasheet, SMCJ75AHE3/9AT pinout, SMCJ75AHE3/9AT application, or SMCJ75AHE3/9AT equivalent, key selection criteria include unidirectional polarity, 1500 W peak pulse power rating, 1.0 µA max reverse leakage at VWM, -55 °C to +150 °C operating junction temperature, and RoHS-compliant AEC-Q101 qualification for automotive-grade reliability.
Technical Context
The SMCJ75AHE3/9AT operates as a clamping-type TVS diode with avalanche breakdown behavior. Its glass-passivated junction enables fast response time (<1 ns) and low incremental surge resistance, critical for suppressing ESD and lightning-induced transients on DC power rails and signal paths.
It is rated for 1500 W peak pulse power (10/1000 µs), derated linearly above 25 °C ambient per Fig. 2, and exhibits a positive temperature coefficient of VBR (+0.106 %/°C), ensuring stable clamping across temperature. Mounting on 8.0 mm × 8.0 mm copper pads is required to achieve full IPPM rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating DC bias level. |
| VBR (min/max) | 83.3 V / 92.1 V at IT = 1 mA - Breakdown onset range; ensures reliable turn-on during overvoltage events. |
| VC @ IPPM | ≤121 V at 12.4 A - Clamped voltage under full 1500 W surge; determines protected circuit's maximum stress level. |
| PPPM | 1500 W - Peak pulse power handling capability with 10/1000 µs waveform; defines single-event surge robustness. |
| ID @ VWM | ≤1.0 µA - Reverse leakage current at rated standoff voltage; ensures minimal power loss in standby. |
| TJ max. | +150 °C - Maximum junction temperature; supports operation in under-hood automotive environments. |
| Package | SMC (DO-214AB) - Surface-mount outline with 7.75 mm × 6.22 mm footprint; compatible with automated placement and reflow. |
Pinout & Package
SMCJ75AHE3/9AT uses the standard SMC (DO-214AB) package: two-terminal, unidirectional device with cathode indicated by a band on the body. Leads are matte tin-plated and solderable per J-STD-002 and JESD 22-B102. Molding compound meets UL 94 V-0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or low-potential node; completes clamping path during transient events. |
| Cathode | High-side connection point | Marked with band; connects to protected line (e.g., 75 V rail); conducts avalanche current when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS power supplies. |
| Glass passivated junction | Enables <1 ns response time and stable long-term reliability under repetitive surge stress. |
| 1500 W peak pulse rating | Withstands IEC 61000-4-5 Level 4 (4 kV) surges on 12 V/24 V systems without degradation. |
| MSL Level 1 (260 °C) | Compatible with standard lead-free reflow profiles; no moisture sensitivity handling required. |
| RoHS-compliant & halogen-free option available | Meets global environmental compliance requirements for automotive and industrial end equipment. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 75 V battery-fed ECUs against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between power input and ground. Use Value: Limits transient voltage to ≤121 V, preventing damage to downstream 100 V-rated MOSFETs and regulators. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors in factory automation PLCs. IC Role / Device Role / Timing Role: Low-leakage (≤1.0 µA) TVS on 24 V supply line feeding sensor front-end. Use Value: Maintains signal integrity during 1 kV EFT bursts while adding negligible offset error due to ultra-low ID. |
| DC-DC Converter Input Protection | Telecom Power Interface Protection |
|
Use Scenario: Input-stage surge suppression for isolated 75 V → 12 V flyback converters in railway signaling. IC Role / Device Role / Timing Role: Primary-side TVS absorbing coupled lightning surges on input bus. Use Value: Withstands 1500 W pulses without thermal runaway, enabling single-device protection per rail. |
Use Scenario: Overvoltage hardening of 48 V PoE-powered base station RF modules. IC Role / Device Role / Timing Role: Standoff-rated (75 V) TVS on DC input prior to DC-DC stage. Use Value: Clamps induced surges to 121 V, staying within absolute maximum ratings of downstream 150 V capacitors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ75A-E3/61T | Lower PPPM (400 W), SMA package (smaller footprint, lower thermal mass). | Not suitable for IEC 61000-4-5 Level 4; limited to low-energy ESD or EFT. | Select only if space-constrained and surge energy is ≤400 W. |
| SMCJ75CAHE3/9AT | Bidirectional variant; same VWM (75 V), symmetric clamping in both polarities. | Required for AC-coupled or floating signal lines where polarity reversal occurs. | Choose bidirectional version only when protecting differential pairs or AC signals. |
Compared with SMCJ75AHE3/9AT, SMAJ75A-E3/61T offers smaller size but sacrifices 73 % peak surge capacity, while SMCJ75CAHE3/9AT provides polarity-agnostic protection at identical power rating-making the original unidirectional model optimal for fixed-polarity 75 V DC rails where cost and thermal performance are prioritized.
Availability
SMCJ75AHE3/9AT is available at Aetrix Electronics and suitable for automotive power systems, industrial sensor interfaces, DC-DC converter inputs, and telecom power interfaces requiring stable component supply with AEC-Q101 assurance and full 1500 W surge capability.
Supply support for SMCJ75AHE3/9AT 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, and protection devices with emphasis on reliability, efficiency, and automotive qualification.
The SMCJ series was developed specifically for high-power transient suppression in harsh environments, targeting automotive, industrial, and telecom applications demanding AEC-Q101 compliance and 1500 W surge immunity.
FAQ
What is the clamping voltage of SMCJ75AHE3/9AT at its rated peak pulse current?
The SMCJ75AHE3/9AT clamps to a maximum of 121 V when subjected to its rated 12.4 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured at TJ = 25 °C with recommended 8.0 mm × 8.0 mm copper pad layout and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The SMCJ75AHE3/9AT maintains this clamping performance across its full operating temperature range.
Is SMCJ75AHE3/9AT suitable for automotive applications?
Yes, SMCJ75AHE3/9AT is AEC-Q101 qualified and explicitly designated for automotive use via the "HE3" suffix. It meets stringent reliability requirements for under-hood and chassis-mounted electronics, including thermal cycling, humidity resistance, and surge endurance. Its -55 °C to +150 °C operating junction temperature range and 1500 W surge rating make it appropriate for engine control units, ADAS power supplies, and body electronics where load dump and ISO 7637-2 compliance are mandatory. The SMCJ75AHE3/9AT carries full qualification documentation per Vishay's automotive product release process.
How does the SMCJ75AHE3/9AT differ from the bidirectional SMCJ75CAHE3/9AT?
The SMCJ75AHE3/9AT is unidirectional, with polarity marked by a cathode band and intended for DC circuits where voltage polarity is fixed. In contrast, SMCJ75CAHE3/9AT is bidirectional, offering symmetrical clamping in both directions and no polarity marking-required for AC-coupled lines or floating differential signals. Both share identical VWM (75 V), PPPM (1500 W), and package (SMC), but the SMCJ75AHE3/9AT delivers lower capacitance and leakage in DC applications. The SMCJ75AHE3/9AT is not interchangeable with the CA variant without circuit redesign.
What is the thermal resistance of SMCJ75AHE3/9AT, and how does it affect PCB layout?
The SMCJ75AHE3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead (RθJL) of 15 °C/W. To achieve rated 1500 W pulse power, the device must be mounted on minimum 8.0 mm × 8.0 mm copper pads per terminal, as specified in the datasheet. Smaller pads cause thermal derating-e.g., at 50 °C ambient, power dissipation drops to 6.5 W continuous. Proper copper area ensures transient energy is safely dissipated without exceeding the +150 °C maximum junction temperature. The SMCJ75AHE3/9AT thermal performance is validated only with this layout.
Does SMCJ75AHE3/9AT require special handling or moisture sensitivity precautions?
No-SMCJ75AHE3/9AT is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and withstands peak reflow temperatures up to 260 °C without baking or dry-pack requirements. Its matte tin-plated leads comply with J-STD-002 and JESD 22-B102 for solderability, and the molding compound meets UL 94 V-0 flammability. These attributes simplify manufacturing integration. The SMCJ75AHE3/9AT is supplied in 13" tape-and-reel (9AT) packaging, optimized for high-volume SMT assembly lines.
SMCJ75AHE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- 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)
SMCJ75AHE3/9AT FAQ
1.How can I place an order for SMCJ75AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ75AHE3/9AT 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 SMCJ75AHE3/9AT reliable?
The price and inventory of SMCJ75AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ75AHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ75AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ75AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ75AHE3/9AT?
SMCJ75AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ75AHE3/9AT 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 SMCJ75AHE3/9AT?
For technical support, including SMCJ75AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ75AHE3/9AT requirements.
6.How does Aetrix verify that SMCJ75AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ75AHE3/9AT 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 SMCJ75AHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ75AHE3/9AT?
All SMCJ75AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ75AHE3/9AT, 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 SMCJ75AHE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ75AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ75AHE3/9AT Tags
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