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Vishay General Semiconductor - Diodes Division SMCJ24HE3/9AT
- Part No.:
- SMCJ24HE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ24HE3/9AT.pdf
- Description:
- TVS DIODE 24VWM 43VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,361
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Product details
Overview
SMCJ24HE3/9AT 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 24 V standoff voltage (VWM), 26.7–29.5 V breakdown range (VBR at 1 mA), 38.9 V clamping voltage (VC) at 38.6 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform. It is AEC-Q101 qualified and used to protect MOSFETs, ICs, and sensor signal lines in automotive power systems.
For engineers reviewing the SMCJ24HE3/9AT datasheet, SMCJ24HE3/9AT pinout, SMCJ24HE3/9AT application, or SMCJ24HE3/9AT equivalent, key selection criteria include unidirectional polarity, 24 V working voltage, 1500 W surge capability, AEC-Q101 qualification, RoHS compliance, and DO-214AB thermal performance under automotive ambient conditions.
Technical Context
The SMCJ24HE3/9AT operates as a silicon avalanche diode with glass-passivated junction, delivering fast response (<1 ps) to transient events such as load dump or inductive switching spikes. Its low incremental surge resistance ensures stable clamping during high-current transients, while its MSL Level 1 moisture sensitivity rating supports lead-free reflow up to 260 °C peak.
Designed for surface-mount placement on 8.0 mm × 8.0 mm copper pads per terminal, it achieves 75 °C/W junction-to-ambient thermal resistance and supports continuous operation from –55 °C to +150 °C junction temperature. The cathode band marking identifies polarity, and its matte tin-plated leads meet J-STD-002 solderability and JESD 22-B102 mechanical reliability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum reverse operating voltage before clamping begins; defines safe DC/AC signal line operating margin. |
| VBR (min/max) | 26.7 V / 29.5 V at 1 mA - Confirmed breakdown threshold range; ensures reliable turn-on above VWM with process tolerance. |
| VC @ IPPM | 38.9 V at 38.6 A - Clamped voltage during 1500 W transient; determines maximum stress imposed on protected downstream circuitry. |
| PPPM | 1500 W - Peak pulse power handling with 10/1000 µs waveform; validates immunity to ISO 7637-2 Pulse 5a/b load-dump surges. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments without derating at 125 °C ambient. |
| Qualification | AEC-Q101 - Certified for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JEDEC standards. |
| Package | DO-214AB (SMCJ) - Standardized surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with automated pick-and-place. |
Pinout & Package
DO-214AB (SMCJ) package: molded epoxy case with coplanar matte tin-plated leads, cathode band marking on one end. Dimensions: 7.75 mm × 6.22 mm × 2.62 mm (L × W × H); recommended pad layout: 8.0 mm × 8.0 mm copper per terminal for optimal thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or low-impedance return path; forms clamping loop with cathode during positive transients. |
| Cathode (banded end) | High-side transient sink | Connected to protected line (e.g., 24 V rail or sensor input); conducts avalanche current to anode during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure. |
| MSL Level 1 rating | Enables single-reflow assembly without baking; supports lead-free reflow profiles up to 260 °C peak temperature. |
| Low incremental surge resistance | Minimizes VC rise under high di/dt transients, improving clamping precision for fast-rising ESD or lightning-induced surges. |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS modules requiring zero-failure field performance. |
| RoHS-compliant HE3 suffix | Indicates AEC-Q101 qualification and JESD 201 Class 2 whisker resistance-critical for high-reliability solder joints in vibration-prone environments. |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply rails in engine control units (ECUs) against load-dump transients per ISO 7637-2 Pulse 5. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between battery rail and DC-DC converter input. Use Value: Limits clamped voltage to 38.9 V, preventing damage to 40 V-rated input stages while sustaining 1500 W surge energy. | Use Scenario: Shielding analog output lines of pressure or temperature sensors in factory automation PLCs from EFT and surge coupling. IC Role / Device Role / Timing Role: Point-of-entry protection on 4–20 mA current-loop outputs exposed to motor drive noise. Use Value: Responds in <1 ps to sub-microsecond transients, maintaining signal integrity without adding capacitance that would distort loop dynamics. |
| On-Board Charger (OBC) Input Stage | Commercial Vehicle Telematics Module |
Use Scenario: Safeguarding AC/DC front-end rectifiers and PFC controllers in EV on-board chargers subjected to grid surges and regenerative braking feedback. IC Role / Device Role / Timing Role: Primary clamping device across bulk DC link (350–450 V bus) with series impedance limiting. Use Value: Withstands repeated 1500 W pulses without parameter shift, enabling >100,000-cycle surge endurance per AEC-Q101 lifetime test requirements. | Use Scenario: Protecting CAN FD and LIN communication ports in fleet management telematics units installed in trucks and buses. IC Role / Device Role / Timing Role: Secondary-level TVS on data lines downstream of common-mode chokes, complementing primary protection. Use Value: AEC-Q101 qualification ensures operational stability across –40 °C to +105 °C ambient, matching vehicle cabin thermal envelope. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A-E3/61T | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (100 °C/W), non-AEC-Q101. | Suitable only for consumer or industrial PCBs with lower surge exposure and no automotive qualification requirement. | Select when cost and board space are prioritized over automotive reliability and 1500 W surge headroom. |
| SMCJ24AHE3/9AT | Identical electrical specs and AEC-Q101 qualification; differs only in marking code (no "H" in part number prefix), same DO-214AB package and thermal performance. | No functional difference; both meet identical automotive stress test requirements and mounting specifications. | SMCJ24AHE3/9AT is a functionally identical variant-verify marking and reel packaging compatibility with your assembly line. |
Compared with SMAJ24A-E3/61T, SMCJ24HE3/9AT delivers 3.75× higher surge power handling and automotive qualification, while SMCJ24AHE3/9AT offers identical protection performance with alternate labeling-making the latter ideal for dual-sourcing without design or layout changes.
Availability
SMCJ24HE3/9AT is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, on-board chargers, and commercial vehicle telematics modules requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMCJ24HE3/9AT 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, efficiency, and application-specific optimization.
The SMCJ series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments-including automotive, industrial, and transportation systems where failure is not an option.
FAQ
What is the clamping voltage of the SMCJ24HE3/9AT under maximum rated surge current?
The SMCJ24HE3/9AT clamps to 38.9 V when subjected to its maximum peak pulse current of 38.6 A (10/1000 µs waveform). This value is measured and guaranteed per Vishay's datasheet Document Number 88394, ensuring predictable overvoltage limiting for downstream 40 V-rated components. The SMCJ24HE3/9AT maintains this clamping performance across its full operating temperature range.
Is the SMCJ24HE3/9AT suitable for automotive applications?
Yes, the SMCJ24HE3/9AT is AEC-Q101 qualified and explicitly rated for automotive use, including engine control, body electronics, and ADAS subsystems. Its construction-glass-passivated junction, MSL Level 1 rating, and JESD 201 Class 2 whisker resistance-meets stringent automotive reliability requirements. The SMCJ24HE3/9AT is commonly deployed in 24 V truck and bus ECUs per ISO 7637-2 compliance needs.
What does the "HE3" suffix indicate in SMCJ24HE3/9AT?
The "HE3" suffix denotes RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance. "H" signals automotive grade, "E3" confirms lead-free matte tin plating compliant with JEDEC and RoHS directives. This distinguishes SMCJ24HE3/9AT from commercial-grade "E3" variants like SMCJ24A-E3/9AT, which lack AEC-Q101 validation. The SMCJ24HE3/9AT is fully traceable to Vishay's automotive material categorization policy.
How does the SMCJ24HE3/9AT differ from bi-directional SMCJ24CA variants?
The SMCJ24HE3/9AT is unidirectional, meaning it protects only against positive transients on the cathode line relative to anode (ground), with forward conduction capability. In contrast, SMCJ24CA is bi-directional and symmetrical-clamping both polarities, making it suitable for AC lines or data signals without defined polarity. The SMCJ24HE3/9AT offers lower leakage and tighter VBR tolerance than its bi-directional counterpart, but cannot replace SMCJ24CA in floating or AC-coupled applications.
What is the recommended PCB pad layout for optimal thermal performance of the SMCJ24HE3/9AT?
Vishay specifies a minimum 8.0 mm × 8.0 mm copper pad area per terminal for the SMCJ24HE3/9AT to achieve rated 1500 W pulse power and 75 °C/W thermal resistance. These pads must be connected to internal ground/power planes via multiple thermal vias. Deviating from this layout reduces surge current capacity and risks thermal runaway during repetitive transients. The SMCJ24HE3/9AT's performance is validated only with this pad configuration per Figure 2 in datasheet 88394.
SMCJ24HE3/9AT 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:
- 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)
SMCJ24HE3/9AT FAQ
1.How can I place an order for SMCJ24HE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ24HE3/9AT 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 SMCJ24HE3/9AT reliable?
The price and inventory of SMCJ24HE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ24HE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ24HE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ24HE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ24HE3/9AT?
SMCJ24HE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ24HE3/9AT 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 SMCJ24HE3/9AT?
For technical support, including SMCJ24HE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ24HE3/9AT requirements.
6.How does Aetrix verify that SMCJ24HE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ24HE3/9AT 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 SMCJ24HE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ24HE3/9AT?
All SMCJ24HE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ24HE3/9AT, 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 SMCJ24HE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ24HE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ24HE3/9AT Tags
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