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Vishay General Semiconductor - Diodes Division SMCJ24AHE3/9AT
- Part No.:
- SMCJ24AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ24AHE3/9AT.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,161
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Product details
Overview
SMCJ24AHE3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 24 V standoff voltage (VWM), 26.7–29.5 V breakdown range (VBR), and 38.6 A peak pulse current (IPPM) under 10/1000 μs waveform. It delivers 1500 W peak pulse power (PPPM) and clamps transients to ≤38.9 V at rated surge, protecting MOSFETs, ICs, and sensor signal lines in automotive and industrial power systems.
For engineers reviewing the SMCJ24AHE3/9AT datasheet, SMCJ24AHE3/9AT pinout, SMCJ24AHE3/9AT application, or SMCJ24AHE3/9AT equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 1500 W surge rating, low clamping voltage (38.9 V), and compatibility with automated SMT placement on standard PCB copper pads.
Technical Context
This TVS diode operates as a clamping device triggered by reverse-biased avalanche breakdown above its VWM of 24 V, with guaranteed VBR between 26.7 V and 29.5 V at 1 mA test current. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and fast response time (<1 ns), enabling suppression of ESD and lightning-induced transients before sensitive downstream circuitry is damaged.
The SMCJ24AHE3/9AT is qualified to AEC-Q101, features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and meets MSL level 1 per J-STD-020 with 260 °C reflow peak. Its thermal resistance (RθJA = 75 °C/W) and junction temperature range (−55 °C to +150 °C) support reliable operation in under-hood automotive and industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 26.7 V / 29.5 V at 1 mA - Ensures predictable, repeatable avalanche turn-on across production lots |
| VC @ IPPM | ≤38.9 V at 38.6 A - Limits voltage seen by protected ICs during 10/1000 μs surge events |
| PPPM | 1500 W - Withstands high-energy transients common in automotive load-dump and inductive switching |
| IPPM | 38.6 A - Peak surge current capability under standardized 10/1000 μs waveform |
| TJ max | +150 °C - Enables use in high-temperature under-hood or industrial control enclosures |
| Leakage (ID) | ≤1.0 μA at 24 V - Minimizes standby power loss and avoids false triggering in low-power circuits |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads; cathode indicated by band marking on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal (unidirectional) | Connected to ground or lower-potential rail; completes clamping path during reverse surge |
| Cathode | Avalanche breakdown terminal (marked with band) | Connected to protected line; conducts when transient exceeds VWM, shunting energy to ground |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces |
| Glass passivated junction | Ensures long-term stability of VBR and low leakage under thermal cycling and humidity stress |
| MSL Level 1 (260 °C) | Supports standard lead-free reflow without popcorn or delamination risk |
| 1500 W peak pulse power | Meets ISO 7637-2 Pulse 5a (load dump) requirements for 12 V systems |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ESD, relay bounce) |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Protection |
|---|---|
Use Scenario: Protecting 12 V supply rails in body control modules against load-dump transients up to 35 V. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between battery input and DC-DC converter input. Use Value: Clamps surges to ≤38.9 V, preventing overvoltage damage to downstream regulators and microcontrollers. | Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) of pressure sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS connected between signal line and ground, with minimal loading on precision output. Use Value: Sub-1 ns response ensures clamping occurs before sensor amplifier input stages are stressed beyond absolute maximum ratings. |
| Consumer Power Adapter Input | Telecom Line Interface Protection |
Use Scenario: Safeguarding AC-DC adapter primary-side rectifier and controller ICs from lightning-induced surges on mains input. IC Role / Device Role / Timing Role: Primary-side TVS placed across bridge rectifier output, absorbing differential-mode transients. Use Value: 1500 W rating handles high-energy surges while maintaining <1.0 μA leakage to avoid efficiency degradation. | Use Scenario: Protecting Ethernet PHY interface pins (e.g., MDI lines) from induced surges in building-wide cabling. IC Role / Device Role / Timing Role: Unidirectional TVS on each data pair, referenced to local ground plane. Use Value: Tight VBR tolerance (26.7–29.5 V) ensures consistent clamping without false triggering during normal 24 V bias operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24AHE3/A | Lower PPPM (400 W), smaller SMA package, same VWM/VBR specs | Not suitable for load-dump or high-energy industrial surges; limited to board-level ESD only | Select when space-constrained layouts require smaller footprint and surge energy is ≤400 W |
| SMCJ24AHM3/9AT | Halogen-free variant; identical electrical specs and AEC-Q101 qualification | No functional difference; used where halogen-free compliance is mandated by OEM or regional regulations | Select when RoHS-compliant halogen-free materials are required without performance trade-off |
Compared with SMAJ24AHE3/A and SMCJ24AHM3/9AT, the SMCJ24AHE3/9AT uniquely combines 1500 W surge capability, AEC-Q101 qualification, and SMC package robustness-making it the preferred choice for automotive power rail and industrial high-energy protection where reliability under extreme transients is critical.
Availability
SMCJ24AHE3/9AT is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, and telecom line surge suppression requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMCJ24AHE3/9AT 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, automotive qualification, and high-volume manufacturability.
The SMCJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments-including automotive, industrial, and telecom infrastructure-where failure immunity and parametric consistency are non-negotiable.
FAQ
What is the clamping voltage of the SMCJ24AHE3/9AT under maximum rated surge current?
The SMCJ24AHE3/9AT has a maximum clamping voltage (VC) of 38.9 V when subjected to its rated peak pulse current (IPPM) of 38.6 A under the standard 10/1000 μs waveform. This value is measured at TA = 25 °C on specified copper pad layout and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The SMCJ24AHE3/9AT maintains this clamping performance across its full operating temperature range.
Is the SMCJ24AHE3/9AT qualified for automotive applications?
Yes, the SMCJ24AHE3/9AT is AEC-Q101 qualified, as confirmed by Vishay's documentation and ordering code suffix "HE3", which denotes RoHS-compliant and AEC-Q101 qualified variants. This qualification covers stress tests including high-temperature operating life, temperature cycling, and ESD, making the SMCJ24AHE3/9AT suitable for under-hood and chassis-mounted automotive electronics such as body control modules and ADAS sensor interfaces.
What does the "9AT" suffix indicate in SMCJ24AHE3/9AT?
The "9AT" suffix in SMCJ24AHE3/9AT specifies the packaging configuration: 13-inch diameter plastic tape and reel, with a base quantity of 3500 units per reel. This format supports high-speed automated SMT placement and is compatible with industry-standard pick-and-place equipment. The "HE3" portion confirms RoHS compliance and AEC-Q101 qualification, while "9AT" is purely a packaging and delivery mode identifier-not an electrical or reliability modifier.
How does the SMCJ24AHE3/9AT differ from bidirectional versions like SMCJ24CA?
The SMCJ24AHE3/9AT is unidirectional, meaning it conducts only in reverse bias above VBR and blocks forward current like a rectifier diode; its cathode is marked with a band. In contrast, SMCJ24CA is bidirectional and symmetrical-offering identical clamping in both polarities, with no polarity marking. The SMCJ24AHE3/9AT is selected for DC power rail protection where polarity is fixed, whereas SMCJ24CA suits AC-coupled or floating signal lines. Electrical parameters (VWM, VBR, PPPM) are otherwise matched within family tolerances.
What is the thermal resistance and maximum junction temperature for the SMCJ24AHE3/9AT?
The SMCJ24AHE3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the minimum recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, and a maximum junction temperature (TJ) of +150 °C. Its junction-to-lead resistance (RθJL) is 15 °C/W. These values enable reliable operation in high-temperature environments such as automotive engine compartments or industrial motor drives, provided PCB layout adheres to Vishay's thermal guidelines.
SMCJ24AHE3/9AT 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):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 38.9V
- Current - Peak Pulse (10/1000µs):
- 38.6A
- 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)
SMCJ24AHE3/9AT FAQ
1.How can I place an order for SMCJ24AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ24AHE3/9AT 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 SMCJ24AHE3/9AT reliable?
The price and inventory of SMCJ24AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ24AHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ24AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ24AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ24AHE3/9AT?
SMCJ24AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ24AHE3/9AT 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 SMCJ24AHE3/9AT?
For technical support, including SMCJ24AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ24AHE3/9AT requirements.
6.How does Aetrix verify that SMCJ24AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ24AHE3/9AT 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 SMCJ24AHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ24AHE3/9AT?
All SMCJ24AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ24AHE3/9AT, 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 SMCJ24AHE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ24AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ24AHE3/9AT Tags
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