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Vishay General Semiconductor - Diodes Division SMCJ24HE3/57T
- Part No.:
- SMCJ24HE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ24HE3/57T.pdf
- Description:
- TVS DIODE 24VWM 43VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,818
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Product details
Overview
SMCJ24HE3/57T from Vishay General Semiconductor is a uni-directional transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) package, designed for robust overvoltage protection of sensitive electronics. It features a 24 V stand-off voltage (VWM), 26.7–29.5 V breakdown voltage (VBR) at 1 mA, 38.9 V clamping voltage (VC) at 38.6 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed in automotive power line and industrial sensor interface protection.
For engineers reviewing the SMCJ24HE3/57T datasheet, SMCJ24HE3/57T pinout, SMCJ24HE3/57T application, or SMCJ24HE3/57T equivalent, key selection criteria include clamping performance under 1500 W surge, AEC-Q101 qualification for automotive reliability, RoHS-compliant HE3 suffix with JESD 201 Class 2 whisker resistance, and DO-214AB thermal derating behavior above 25 °C.
Technical Context
The SMCJ24HE3/57T operates as a silicon avalanche diode with glass-passivated junction, delivering sub-nanosecond response to transients. Its uni-directional polarity uses cathode band marking, and it meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow compatibility.
Thermal design relies on RθJA = 75 °C/W (typ.) and RθJL = 15 °C/W (typ.), requiring minimum 8.0 mm × 8.0 mm copper pads per terminal for rated PPPM. Junction temperature range is –55 °C to +150 °C, supporting operation in under-hood automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - maximum continuous reverse operating voltage before conduction begins; defines safe signal/power rail margin. |
| VBR min/max | 26.7 V / 29.5 V at IT = 1 mA - guaranteed avalanche initiation window; ensures consistent turn-on across production lots. |
| VC @ IPPM | 38.9 V at 38.6 A - clamped voltage during 1500 W transient; determines protected circuit's maximum stress level. |
| PPPM | 1500 W (10/1000 μs) - peak surge energy handling capacity; validates suitability for ISO 7637-2 Pulse 1/2a/5a compliance testing. |
| TJ max | +150 °C - maximum junction temperature; enables use in high-ambient automotive and industrial control enclosures. |
| AEC-Q101 | Qualified - certified for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard. |
| RoHS / Whisker | RoHS-compliant HE3 suffix; meets JESD 201 Class 2 whisker resistance - supports long-term solder joint integrity in vibration-prone systems. |
Pinout & Package
Package: DO-214AB (SMCJ), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Polarity marked by cathode band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path); conducts during forward surge events (IFSM = 200 A). |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 24 V supply); avalanches when reverse voltage exceeds VBR, shunting surge to anode. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR over time and temperature; eliminates moisture-induced parameter drift in humid environments. |
| Low incremental surge resistance | Minimizes VC rise under high di/dt transients - critical for protecting fast-switching MOSFET gates and CAN transceivers. |
| MSL Level 1 rating | Enables direct placement without baking; compatible with standard 260 °C lead-free reflow profiles. |
| Bi-directional variant availability | Same package family offers CA-suffix parts (e.g., SMCJ24CA) for AC-coupled or floating-line protection where polarity is undefined. |
| UL 94 V-0 molding compound | Prevents flame propagation in enclosure-level safety certification; required for industrial control panel approvals. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface |
|---|---|
|
Use Scenario: Protecting 24 V supply rails in engine control units (ECUs) against load dump and inductive switching spikes per ISO 7637-2. IC Role / Device Role / Timing Role: Primary clamping device placed at connector entry point, shunting surges >38.9 V to ground before reaching downstream regulators and microcontrollers. Use Value: Withstands 1500 W pulses and AEC-Q101 qualification, ensuring functional safety compliance and 15-year field reliability in harsh under-hood conditions. |
Use Scenario: Safeguarding analog outputs (e.g., 4–20 mA loops) and digital I/O lines of PLC modules exposed to field wiring transients. IC Role / Device Role / Timing Role: Fast-response TVS placed adjacent to connector pins, limiting induced surges to <38.9 V within nanoseconds to prevent ADC input saturation or GPIO latch-up. Use Value: Low clamping voltage and 10/1000 μs waveform capability meet IEC 61000-4-5 Level 3 immunity requirements for industrial equipment. |
| Telecom DC Power Feeds | Motor Drive Gate Driver Protection |
|
Use Scenario: Shielding -48 V telecom rectifier outputs from lightning-induced surges entering via long cable runs. IC Role / Device Role / Timing Role: Uni-directional clamp referenced to system ground, absorbing common-mode transients while maintaining steady-state regulation. Use Value: 24 V VWM aligns with nominal -48 V systems using split-rail architectures; 1500 W rating covers telecom-specific surge test profiles. |
Use Scenario: Preventing gate oxide damage in high-side N-channel MOSFET drivers due to Miller-induced voltage spikes during switching. IC Role / Device Role / Timing Role: Localized TVS between gate and source, activated only during overvoltage events exceeding 24 V, preserving normal gate drive timing. Use Value: Sub-ns response and low VC ensure gate voltage stays below absolute maximum ratings even during fast dv/dt events in 100 kHz+ motor drives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A-E3/52T | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (110 °C/W), same VWM/VBR/VC specs. | Not suitable for 1500 W surge environments; limited to low-energy signal lines or secondary protection stages. | Select only when board space is constrained and surge threat level is ≤400 W (e.g., USB or RS-485 data lines). |
| SMCJ24AHE3/57T | Identical electrical specs and packaging; differs only in marking code (no functional difference - HE3 denotes AEC-Q101, same as SMCJ24HE3/57T). | No application difference; both qualified for automotive and industrial use with identical thermal and surge performance. | SMCJ24AHE3/57T is a documented alternate marking for SMCJ24HE3/57T per Vishay ordering documentation; interchangeable in BOMs. |
Compared with SMAJ24A-E3/52T, SMCJ24HE3/57T delivers 3.75× higher surge power handling and superior thermal dissipation, making it mandatory for primary protection; versus SMCJ24AHE3/57T, it is functionally identical - differing only in internal lot traceability and marking convention, not performance or qualification.
Availability
SMCJ24HE3/57T is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, and telecom power supplies requiring stable component supply with AEC-Q101 assurance, RoHS compliance, and 1500 W transient immunity.
Supply support for SMCJ24HE3/57T 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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The SMCJ series was engineered specifically for high-energy transient suppression in demanding environments, emphasizing AEC-Q101 qualification, tight VBR tolerances, and robust thermal performance in surface-mount packages.
FAQ
What is the clamping voltage of the SMCJ24HE3/57T and how is it measured?
The SMCJ24HE3/57T has a maximum clamping voltage (VC) of 38.9 V, measured at a peak pulse current (IPPM) of 38.6 A using a standardized 10/1000 μs double-exponential waveform. This value represents the upper limit of voltage seen by protected circuitry during a full-rated 1500 W transient event, and is guaranteed across the operating temperature range per Vishay Document 88394.
Is the SMCJ24HE3/57T suitable for automotive applications?
Yes, the SMCJ24HE3/57T is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments. Its –55 °C to +150 °C junction temperature range, MSL Level 1 reflow compatibility, and validation against mechanical stress, temperature cycling, and HTRB tests confirm its suitability for ECUs, body control modules, and ADAS power supplies.
How does the HE3 suffix differ from E3 in the SMCJ24HE3/57T part number?
The HE3 suffix indicates RoHS compliance plus AEC-Q101 qualification and JESD 201 Class 2 whisker resistance, whereas E3 denotes RoHS compliance only (commercial grade). For SMCJ24HE3/57T, HE3 confirms automotive-grade reliability - essential for mission-critical protection in vehicles - while retaining identical electrical parameters and DO-214AB packaging as E3 variants.
What is the thermal resistance of the SMCJ24HE3/57T and how does it affect layout?
The SMCJ24HE3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. To sustain full 1500 W surge capability, PCB layout must provide these minimum pad dimensions; reducing pad area increases thermal impedance and derates PPPM, potentially causing thermal runaway during repeated transients.
Can the SMCJ24HE3/57T be used in bi-directional protection circuits?
No - the SMCJ24HE3/57T is a uni-directional TVS diode, identified by the "A" suffix and cathode band marking. For bi-directional applications (e.g., AC lines or floating data buses), the SMCJ24CA variant must be used instead. Using SMCJ24HE3/57T in reverse-biased AC configurations risks catastrophic failure due to lack of symmetrical avalanche capability.
SMCJ24HE3/57T 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):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 43V
- Current - Peak Pulse (10/1000µs):
- 34.9A
- 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)
SMCJ24HE3/57T FAQ
1.How can I place an order for SMCJ24HE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ24HE3/57T 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 SMCJ24HE3/57T reliable?
The price and inventory of SMCJ24HE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ24HE3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ24HE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ24HE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ24HE3/57T?
SMCJ24HE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ24HE3/57T 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 SMCJ24HE3/57T?
For technical support, including SMCJ24HE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ24HE3/57T requirements.
6.How does Aetrix verify that SMCJ24HE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ24HE3/57T 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 SMCJ24HE3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ24HE3/57T?
All SMCJ24HE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ24HE3/57T, 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 SMCJ24HE3/57T part is unused and in its original packaging.
Return procedure for SMCJ24HE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ24HE3/57T Tags
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