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Vishay General Semiconductor - Diodes Division SMCJ24-E3/9AT
- Part No.:
- SMCJ24-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ24-E3/9AT.pdf
- Description:
- TVS DIODE 24VWM 43VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,750
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Product details
Overview
SMCJ24-E3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 24 V stand-off voltage (VWM), 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 ECUs, industrial PLC I/O modules, and telecom power supplies.
For engineers reviewing the SMCJ24-E3/9AT datasheet, SMCJ24-E3/9AT pinout, SMCJ24-E3/9AT application, or SMCJ24-E3/9AT equivalent, key selection criteria include verified clamping performance under 10/1000 μs surge, AEC-Q101 qualification for automotive use, RoHS-compliant matte tin plating, and thermal resistance (RθJA = 75 °C/W) validated on 8.0 mm × 8.0 mm copper pads.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds its 26.7–29.5 V breakdown range (VBR) at 1 mA test current. Its glass-passivated junction ensures stable leakage (<1.0 μA at 24 V) and fast response (<1 ns), enabling protection against ESD, lightning-induced transients, and inductive switching spikes.
Thermally, it supports continuous operation from –55 °C to +150 °C junction temperature, with 6.5 W power dissipation at TA = 50 °C on infinite heatsink and 200 A non-repetitive forward surge rating (IFSM, 8.3 ms half-sine). The device meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101 for automotive-grade reliability.
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 IT = 1 mA - guaranteed avalanche onset window for predictable turn-on |
| VC @ IPPM | 38.9 V at 38.6 A - clamped voltage during 10/1000 μs surge, limiting downstream stress |
| PPPM | 1500 W - peak transient energy handling capability under standardized waveform |
| ID @ VWM | ≤1.0 μA - ultra-low leakage preserves system efficiency in standby and low-power modes |
| TJ max. | +150 °C - enables deployment in under-hood automotive and high-temperature industrial environments |
| RθJA | 75 °C/W - thermal resistance measured on 8.0 mm × 8.0 mm copper pads, critical for PCB layout planning |
Pinout & Package
Package: DO-214AB (SMCJ), surface-mount, low-profile case with molded compound rated UL 94 V-0. Cathode indicated by band on body; leads are matte tin plated, solderable per J-STD-002 and JESD 22-B102.
| 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 (banded end) | Avalanche clamping terminal | Connected to protected line (e.g., 24 V rail); conducts during overvoltage to shunt surge to ground |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity |
| AEC-Q101 qualification | Validated for automotive applications including engine control, ADAS sensors, and infotainment power rails |
| MSL Level 1 rating | Enables standard reflow assembly without moisture sensitivity concerns (peak 260 °C) |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving protection margin for sensitive ICs |
| RoHS-compliant E3 suffix | Meets JESD 201 Class 1A whisker resistance, suitable for high-reliability industrial and telecom assemblies |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply inputs in engine control units (ECUs) against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between battery feed and DC-DC converter input. Use Value: Limits transient voltage to ≤38.9 V, preventing damage to downstream regulators and microcontrollers rated for 40 V absolute max. | Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: Signal-line TVS mounted at connector entry point to absorb ESD and field-induced surges. Use Value: Sub-1 ns response and <1.0 μA leakage preserve signal integrity and minimize offset error in precision 4–20 mA loops. |
| Telecom DC Power Input Protection | Consumer Power Adapter Output Clamping |
Use Scenario: Shielding 24 V DC input of base station remote radio units (RRUs) from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main power entry, coordinated with upstream fuses and secondary filtering. Use Value: 1500 W PPPM rating sustains multiple 10/1000 μs surges without degradation, meeting IEC 61000-4-5 Level 4 requirements. | Use Scenario: Preventing overvoltage failure in USB-C PD adapters during output short-circuit recovery or feedback loop instability. IC Role / Device Role / Timing Role: Secondary-side clamp across regulated 24 V output, absorbing regulator overshoot and capacitive discharge energy. Use Value: 24 V VWM aligns precisely with adapter nominal output, avoiding false triggering while ensuring fast clamping at 38.9 V. |
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-E3/57T | Lower PPPM (400 W), smaller DO-214AC (SMA) package, same VWM/VBR/VC specs | Not rated for AEC-Q101; limited thermal mass reduces surge endurance in high-energy environments | Select when board space is constrained and surge energy remains below 400 W; verify layout derating for repeated events. |
| SMCJ24AHE3/9AT | Identical electrical specs but AEC-Q101 qualified HE3 suffix (JESD 201 Class 2 whisker test) | Same automotive use cases; preferred where extended whisker resistance is mandated (e.g., safety-critical modules) | Choose for new automotive designs requiring Class 2 whisker compliance; otherwise SMCJ24-E3/9AT suffices for most AEC-Q101 applications. |
Compared with SMAJ24A-E3/57T, SMCJ24-E3/9AT delivers 3.75× higher surge power handling and superior thermal stability; versus SMCJ24AHE3/9AT, it offers identical protection performance with Class 1A whisker resistance - sufficient for most automotive ECUs and industrial controls without added cost.
Availability
SMCJ24-E3/9AT is available at Aetrix Electronics and suitable for automotive electronics, industrial automation, and telecommunications infrastructure requiring stable component supply, AEC-Q101 qualification, and high-energy transient suppression.
Supply support for SMCJ24-E3/9AT 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific validation.
The SMCJ series is part of Vishay's TRANSZORB® TVS platform, engineered for high-power, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom systems demanding AEC-Q101 compliance and repeatable clamping performance.
FAQ
What is the clamping voltage of the SMCJ24-E3/9AT under a 10/1000 μs surge?
The SMCJ24-E3/9AT has a maximum clamping voltage (VC) of 38.9 V when subjected to its rated peak pulse current of 38.6 A using the 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's datasheet revision 11-Dec-12 (Document Number: 88394), ensuring predictable overvoltage limiting for protected circuits.
Is the SMCJ24-E3/9AT qualified for automotive applications?
Yes, the SMCJ24-E3/9AT is AEC-Q101 qualified, as explicitly stated in the Vishay datasheet under "MECHANICAL DATA" and "RATINGS AND CHARACTERISTICS CURVES". This qualification validates its reliability for automotive use cases including engine control, body electronics, and ADAS power domains - provided thermal design follows the recommended 8.0 mm × 8.0 mm copper pad layout.
What does the "E3/9AT" suffix indicate in SMCJ24-E3/9AT?
The "E3" suffix denotes RoHS-compliant construction with matte tin-plated leads meeting JESD 201 Class 1A whisker resistance, while "9AT" specifies packaging in 13-inch diameter plastic tape and reel with a base quantity of 3500 units. This ordering code is defined in the "ORDERING INFORMATION" section of the Vishay datasheet (Document Number: 88394).
How does the SMCJ24-E3/9AT differ from bi-directional variants like SMCJ24CA?
The SMCJ24-E3/9AT is unidirectional, meaning it clamps only in reverse bias and conducts forward current like a standard diode; SMCJ24CA is bi-directional with symmetrical clamping in both polarities. The unidirectional version offers lower leakage (<1.0 μA) and is used where polarity is fixed (e.g., 24 V rail to ground), whereas bi-directional types protect AC or floating signal lines.
What is the thermal resistance of the SMCJ24-E3/9AT, and how does it affect PCB layout?
The SMCJ24-E3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper pads per terminal. This value assumes minimum recommended pad layout - reducing pad size or omitting thermal vias increases junction temperature, potentially derating surge capability and long-term reliability in sustained high-temperature environments.
SMCJ24-E3/9AT 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ24-E3/9AT FAQ
1.How can I place an order for SMCJ24-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ24-E3/9AT 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 SMCJ24-E3/9AT reliable?
The price and inventory of SMCJ24-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ24-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ24-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ24-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ24-E3/9AT?
SMCJ24-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ24-E3/9AT 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 SMCJ24-E3/9AT?
For technical support, including SMCJ24-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ24-E3/9AT requirements.
6.How does Aetrix verify that SMCJ24-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ24-E3/9AT 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 SMCJ24-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ24-E3/9AT?
All SMCJ24-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ24-E3/9AT, 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 SMCJ24-E3/9AT part is unused and in its original packaging.
Return procedure for SMCJ24-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ24-E3/9AT Tags
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