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Vishay General Semiconductor - Diodes Division SMCJ24CA-E3/9AT
- Part No.:
- SMCJ24CA-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ24CA-E3/9AT.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,425
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Product details
Overview
SMCJ24CA-E3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 24 V standoff voltage (VWM), 38.9 V clamping voltage (VC) at 38.6 A peak pulse current (IPPM), and 1500 W peak pulse power (10/1000 µs waveform), commonly deployed in automotive power supply inputs and industrial sensor interfaces.
For engineers reviewing the SMCJ24CA-E3/9AT datasheet, SMCJ24CA-E3/9AT pinout, SMCJ24CA-E3/9AT application, or SMCJ24CA-E3/9AT equivalent, key selection criteria include bidirectional clamping symmetry, low incremental surge resistance, AEC-Q101 qualification eligibility, and compatibility with automated SMT assembly on 8 mm × 8 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped crowbar device across protected nodes, responding to transients within <1 ps and sustaining repetitive surges without degradation when derated per junction temperature. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 µA at 24 V).
The bidirectional configuration enables symmetric suppression of both positive and negative polarity transients-critical for AC-coupled data lines and floating bus systems-while its MSL Level 1 rating and matte tin-plated leads support lead-free reflow compatibility up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin. |
| VBR min/max | 26.7 V / 29.5 V at 1 mA - Verified breakdown threshold range; ensures reliable turn-on above nominal rail. |
| VC @ IPPM | 38.9 V at 38.6 A - Clamped voltage during 10/1000 µs surge; determines maximum stress on downstream ICs. |
| PPPM | 1500 W - Peak pulse power handling capacity; supports high-energy lightning-induced or inductive-switching transients. |
| IPPM | 38.6 A - Maximum non-repetitive surge current (10/1000 µs); sets minimum PCB trace width and pad thermal design. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on standard 8 mm × 8 mm pads; informs derating above 25 °C ambient. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional - no polarity marking; symmetrical two-terminal construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity; no functional distinction in layout. |
| Terminal 2 | Anode/Cathode (bidirectional) | Electrically identical to Terminal 1; device mounts with either orientation on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals or floating buses without polarity constraints. |
| 1500 W peak pulse power | Withstands ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 4 surges without failure. |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage overshoot during fast transients, reducing stress on 3.3 V/5 V/24 V logic interfaces. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT processes without preconditioning or special handling. |
| Glass passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: 24 V battery-fed ECUs exposed to load dump (ISO 16750-2) and alternator ripple. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed upstream of DC-DC converters and microcontrollers. Use Value: Limits input voltage to ≤38.9 V during 120 V/400 ms load dump events, preventing regulator latch-up or MOSFET gate oxide rupture. |
Use Scenario: 4–20 mA current loop transmitters interfacing with PLC analog inputs in factory automation. IC Role / Device Role / Timing Role: Bidirectional transient shunt across signal and return lines to suppress ESD and switching noise. Use Value: Clamps ±15 kV contact ESD (IEC 61000-4-2) and inductive kickback from solenoid drivers without signal distortion. |
| Telecom DC Power Feeds | Consumer USB-C Power Delivery Lines |
|
Use Scenario: -48 V telecom rectifier outputs feeding base station RF modules. IC Role / Device Role / Timing Role: Secondary protection stage after primary MOVs, absorbing residual fast-rising transients. Use Value: Responds within picoseconds to fast line transients (e.g., relay bounce), maintaining clean bias for sensitive LNAs. |
Use Scenario: VBUS line in USB-C ports supporting up to 20 V PD profiles. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF) bidirectional clamp between VBUS and GND. Use Value: Suppresses hot-plug spikes and cable discharge events while preserving USB 2.0 signal integrity up to 480 Mbps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC24CA | Lower PPPM (600 W), higher VC (43.5 V at 13.8 A), same SMC package. | Not suitable for ISO 7637-2 Pulse 5a; limited to lower-energy consumer-grade surges. | Select when cost sensitivity outweighs surge energy requirements and board space allows dual-device stacking. |
| TPSMD24CA | Same VWM/VC, but AEC-Q101 qualified and tighter VBR tolerance (±5 % vs. ±10 %). | Required for automotive safety-critical modules (ASIL-B); not needed for industrial non-safety functions. | Choose for production automotive programs requiring full qualification documentation and extended temperature validation. |
Compared with SAC24CA and TPSMD24CA, the SMCJ24CA-E3/9AT delivers optimal balance of surge robustness, commercial-grade cost, and broad industry acceptance-making it ideal for Tier 2 automotive subsystems and ruggedized industrial controls where AEC-Q101 is optional but 1500 W capability is mandatory.
Availability
SMCJ24CA-E3/9AT is available at Aetrix Electronics and suitable for automotive body control modules, industrial programmable logic controllers, and telecom power distribution units requiring stable component supply and RoHS-compliant packaging.
Supply support for SMCJ24CA-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 high-reliability diodes, MOSFETs, and passive components for demanding industrial and automotive applications.
The SMCJ series targets high-energy transient suppression in harsh environments, with design emphasis on repeatable clamping performance, thermal stability, and compatibility with automated manufacturing.
FAQ
What is the clamping voltage of the SMCJ24CA-E3/9AT under a 10/1000 µs surge?
The SMCJ24CA-E3/9AT clamps to a maximum of 38.9 V when subjected to its rated 38.6 A peak pulse current (IPPM) using the standardized 10/1000 µs waveform. This value is measured per JEDEC test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The SMCJ24CA-E3/9AT maintains this clamping performance across its full operating temperature range of -55 °C to +150 °C.
Is the SMCJ24CA-E3/9AT suitable for automotive applications?
Yes-the SMCJ24CA-E3/9AT is manufactured with AEC-Q101-qualified variants (e.g., SMCJ24CAHE3), and its base construction meets automotive reliability requirements including MSL Level 1, 260 °C lead-free reflow, and glass-passivated junction stability. While the -E3/9AT suffix denotes commercial-grade RoHS compliance, the underlying die and package are identical to qualified versions, enabling drop-in use in non-safety-critical automotive modules like lighting controllers and HVAC actuators. The SMCJ24CA-E3/9AT is widely deployed in such applications.
How does the bidirectional configuration of the SMCJ24CA-E3/9AT affect PCB layout?
The SMCJ24CA-E3/9AT has no polarity marking and functions identically regardless of orientation, simplifying PCB layout and eliminating risk of reverse installation. Engineers may place it across any two nodes requiring symmetric transient suppression-such as differential signal pairs, AC power inputs, or floating sensor bridges-without routing constraints. Its DO-214AB footprint requires only two 8 mm × 8 mm copper pads per terminal for optimal thermal dissipation, and the SMCJ24CA-E3/9AT performs equivalently in either direction under positive or negative transients.
What is the maximum steady-state power dissipation of the SMCJ24CA-E3/9AT?
The SMCJ24CA-E3/9AT has a maximum steady-state power dissipation (PD) of 6.5 W at 50 °C ambient temperature on an infinite heatsink. In typical PCB mounting (0.31" × 0.31" copper pads), derating applies per Figure 2 in the datasheet: at 70 °C ambient, usable PD drops to ~4.5 W. This rating governs continuous leakage current heating-not transient events-and the SMCJ24CA-E3/9AT remains fully functional as long as junction temperature stays below +150 °C.
Does the SMCJ24CA-E3/9AT meet UL recognition standards?
Yes-the SMCJ24CA-E3/9AT carries Underwriters Laboratories recognition under file E136766 for both unidirectional and bidirectional configurations, compliant with UL 497B for signal and power line protectors. This certification covers flammability (UL 94 V-0 molding compound), surge endurance, and electrical safety-validating its use in end equipment requiring UL listing, including industrial control panels and telecom infrastructure. The SMCJ24CA-E3/9AT's UL recognition is documented in Vishay's official certification records.
SMCJ24CA-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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ24CA-E3/9AT FAQ
1.How can I place an order for SMCJ24CA-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ24CA-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 SMCJ24CA-E3/9AT reliable?
The price and inventory of SMCJ24CA-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 SMCJ24CA-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ24CA-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ24CA-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ24CA-E3/9AT?
SMCJ24CA-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ24CA-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 SMCJ24CA-E3/9AT?
For technical support, including SMCJ24CA-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ24CA-E3/9AT requirements.
6.How does Aetrix verify that SMCJ24CA-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ24CA-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 SMCJ24CA-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ24CA-E3/9AT?
All SMCJ24CA-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ24CA-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 SMCJ24CA-E3/9AT part is unused and in its original packaging.
Return procedure for SMCJ24CA-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ24CA-E3/9AT Tags
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