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Vishay General Semiconductor - Diodes Division SMCJ75CHE3/9AT
- Part No.:
- SMCJ75CHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ75CHE3/9AT.pdf
- Description:
- TVS DIODE 75VWM 134VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,708
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Product details
Overview
SMCJ75CHE3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) package, designed for robust overvoltage protection of sensitive electronics. 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), and clamps transients to ≤121 V at 12.4 A with 1500 W peak pulse power (10/1000 µs waveform). It is AEC-Q101 qualified and used in automotive power line and ECU input protection.
For engineers reviewing the SMCJ75CHE3/9AT datasheet, SMCJ75CHE3/9AT pinout, SMCJ75CHE3/9AT application, or SMCJ75CHE3/9AT equivalent, key selection criteria include unidirectional polarity, 121 V clamping voltage at rated surge, RoHS-compliant AEC-Q101 qualification, DO-214AB thermal performance (RθJA = 75 °C/W), and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ75CHE3/9AT operates as a silicon avalanche diode that enters breakdown when reverse voltage exceeds its VBR range (83.3–92.1 V), diverting surge current away from protected circuitry. Its low incremental surge resistance ensures stable clamping under high-current transients, while glass-passivated junction enhances reliability and long-term stability.
Designed for single-polarity DC rail protection, it exhibits no forward conduction during normal operation but conducts heavily during overvoltage events, limiting voltage across downstream components to ≤121 V. Its MSL Level 1 rating and matte tin-plated leads support lead-free reflow soldering per J-STD-002 and JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 83.3 V / 92.1 V at 1 mA - Confirmed breakdown threshold range defining turn-on consistency |
| VC @ IPPM | ≤121 V at 12.4 A - Clamped voltage during full-rated 1500 W transient, directly limiting stress on protected ICs |
| PPPM | 1500 W (10/1000 µs) - Peak surge energy handling capacity for lightning/inductive-switching transients |
| TJ max | +150 °C - Maximum junction temperature enabling operation in under-hood automotive environments |
| Package | DO-214AB (SMCJ) - Standardized surface-mount outline with 75 °C/W junction-to-ambient thermal resistance |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
SMCJ75CHE3/9AT uses the DO-214AB (SMCJ) package: molded plastic case with J-bend leads, 0.320" body length, cathode band marking on one end. Leads are matte tin-plated, compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional configuration |
| Cathode | Reverse-blocking / clamping terminal | Marked with band; connected to protected line (e.g., 12 V battery rail); conducts during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term leakage stability under thermal cycling and humidity |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients, improving clamping precision |
| MSL Level 1 (260 °C peak) | Enables standard lead-free reflow without moisture-induced popcorn failure |
| AEC-Q101 qualification | Validates suitability for automotive powertrain and body electronics per stress test requirements |
| RoHS-compliant HE3 suffix | Indicates AEC-Q101 grade with JESD 201 Class 2 whisker resistance for high-reliability solder joints |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump and jump-start transients up to ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor, clamping surges before they reach LDOs or microcontrollers. Use Value: Limits voltage to ≤121 V during 12.4 A transients, preventing damage to 16 V-rated input stages in automotive MCUs and power management ICs. | Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in factory automation systems exposed to relay coil switching noise. IC Role / Device Role / Timing Role: Placed at sensor module output connector to shunt inductive kickback from nearby solenoids or contactors. Use Value: Fast response (<1 ps) and low clamping voltage preserve signal integrity on 0–5 V or 4–20 mA lines, avoiding ADC saturation or op-amp latch-up. |
| Telecom DC Power Input Protection | Computer Peripheral Port Protection |
Use Scenario: Securing -48 V telecom rectifier outputs against lightning-induced surges entering central office equipment. IC Role / Device Role / Timing Role: Reverse-connected across DC input terminals to clamp negative-going transients on negative-ground systems. Use Value: Withstands 1500 W pulses while maintaining ≤121 V clamping, ensuring upstream DC/DC converters remain within safe operating area. | Use Scenario: Hardening USB or RS-232 port power pins against ESD and cable discharge events in desktop peripherals. IC Role / Device Role / Timing Role: Mounted at board edge near connector, oriented to protect +5 V VBUS or +12 V auxiliary rails. Use Value: AEC-Q101 qualification and 1000 V ESD immunity (per IEC 61000-4-2) provide margin beyond consumer-grade requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ75AHE3/A | Lower PPPM (400 W), smaller DO-214AC (SMA) package, higher RθJA (110 °C/W) | Suitable only for lower-energy transients; limited thermal margin in high-ambient automotive use | Select when board space is constrained and surge energy is <400 W; not drop-in for SMCJ75CHE3/9AT's 1500 W requirement |
| SMCJ75A-E3/9AT | Same electrical specs and DO-214AB package, but commercial-grade (non-AEC-Q101), E3 suffix only | Lacks automotive qualification; acceptable for industrial/commercial power supplies where AEC-Q101 is not mandated | Choose for cost-sensitive non-automotive designs requiring identical clamping and footprint |
Compared with SMAJ75AHE3/A and SMCJ75A-E3/9AT, the SMCJ75CHE3/9AT uniquely combines 1500 W surge capability, AEC-Q101 qualification, and DO-214AB thermal performance-making it the only option among the three validated for under-hood automotive deployment with full ISO 7637-2 compliance margin.
Availability
SMCJ75CHE3/9AT is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom DC power inputs requiring stable component supply, AEC-Q101 traceability, and 1500 W transient immunity.
Supply support for SMCJ75CHE3/9AT 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive-grade validation.
The SMCJ series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments-including automotive, industrial, and telecom infrastructure-where consistent clamping and long-term parametric stability are critical.
FAQ
What is the clamping voltage of the SMCJ75CHE3/9AT at its rated peak pulse current?
The SMCJ75CHE3/9AT clamps to a maximum of 121 V when subjected to its rated peak pulse current of 12.4 A (10/1000 µs waveform). This value is guaranteed per the Vishay datasheet and defines the upper voltage limit imposed on protected circuitry during worst-case transients. The SMCJ75CHE3/9AT achieves this clamping performance while dissipating 1500 W, making it suitable for demanding automotive and industrial surge environments.
Is the SMCJ75CHE3/9AT suitable for bi-directional transient protection?
No, the SMCJ75CHE3/9AT is a unidirectional TVS diode, indicated by the "A" suffix (not "CA"). It blocks voltage in the forward direction and clamps only reverse transients. For bi-directional protection, Vishay offers the SMCJ75CA series. Using the SMCJ75CHE3/9AT in a bi-directional configuration would result in forward conduction during positive transients, potentially damaging the device or downstream circuitry. Always verify polarity alignment in layout for the SMCJ75CHE3/9AT.
What does the "HE3" suffix signify in SMCJ75CHE3/9AT?
"HE3" denotes two critical qualifications: "H" indicates AEC-Q101 automotive reliability certification, and "E3" confirms RoHS compliance with matte tin plating meeting JESD 201 Class 2 whisker resistance. This distinguishes it from commercial-grade "E3" parts (e.g., SMCJ75A-E3/9AT) and ensures suitability for automotive applications where long-term solder joint integrity and stress-test validation are mandatory. The SMCJ75CHE3/9AT is fully traceable to these specifications per Vishay documentation.
Can the SMCJ75CHE3/9AT be used in place of the SMCJ75A-E3/9AT?
Yes, the SMCJ75CHE3/9AT is a direct form-fit-function replacement for the SMCJ75A-E3/9AT, sharing identical electrical parameters, DO-214AB package dimensions, and pinout. The only difference is the AEC-Q101 qualification and enhanced whisker resistance of the HE3 version. If your design requires automotive qualification, the SMCJ75CHE3/9AT is the appropriate choice; otherwise, the SMCJ75A-E3/9AT may be selected for cost-sensitive commercial applications. Both parts mount identically on PCBs.
What is the maximum operating temperature for the SMCJ75CHE3/9AT?
The SMCJ75CHE3/9AT has a maximum junction temperature (TJ max) of +150 °C, validated per AEC-Q101 testing. This allows reliable operation in under-hood automotive environments and high-ambient industrial settings. Derating applies above 25 °C ambient-see Figure 2 in the Vishay datasheet (Doc. #88394)-but the SMCJ75CHE3/9AT maintains full 1500 W surge capability up to at least +85 °C ambient when mounted on recommended 8.0 mm × 8.0 mm copper pads.
SMCJ75CHE3/9AT 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 75V
- Voltage - Breakdown (Min):
- 83.3V
- Voltage - Clamping (Max) @ Ipp:
- 134V
- Current - Peak Pulse (10/1000µs):
- 11.2A
- 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)
SMCJ75CHE3/9AT FAQ
1.How can I place an order for SMCJ75CHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ75CHE3/9AT 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 SMCJ75CHE3/9AT reliable?
The price and inventory of SMCJ75CHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ75CHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ75CHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ75CHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ75CHE3/9AT?
SMCJ75CHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ75CHE3/9AT 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 SMCJ75CHE3/9AT?
For technical support, including SMCJ75CHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ75CHE3/9AT requirements.
6.How does Aetrix verify that SMCJ75CHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ75CHE3/9AT 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 SMCJ75CHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ75CHE3/9AT?
All SMCJ75CHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ75CHE3/9AT, 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 SMCJ75CHE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ75CHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ75CHE3/9AT Tags
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