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Vishay General Semiconductor - Diodes Division SMCJ24CA-M3/57T
- Part No.:
- SMCJ24CA-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ24CA-M3/57T.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,399
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Product details
Overview
SMCJ24CA-M3/57T from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients on signal or power lines. It features a 24 V standoff voltage (VWM), 38.9 V maximum clamping voltage (VC) at 38.6 A peak pulse current (IPPM), and 1500 W peak pulse power (10/1000 µs waveform), making it suitable for protecting automotive sensor interfaces and industrial I/O circuits.
For engineers reviewing the SMCJ24CA-M3/57T datasheet, SMCJ24CA-M3/57T pinout, SMCJ24CA-M3/57T application, or SMCJ24CA-M3/57T equivalent, key selection criteria include bidirectional clamping capability, 1500 W surge rating, 24 V working voltage, low clamping ratio (VC/VWM = 1.62), and halogen-free RoHS-compliant construction per M3 suffix.
Technical Context
The SMCJ24CA-M3/57T operates as a voltage-clamping device using an avalanche breakdown mechanism, with symmetrical bidirectional conduction enabling protection of AC-coupled or differential signal paths without polarity sensitivity. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM).
Thermal performance is defined by RθJA = 75 °C/W and RθJL = 15 °C/W, supporting operation from –55 °C to +150 °C junction temperature. It meets J-STD-020 MSL Level 1 and is qualified to AEC-Q101 when ordered with HE3/HM3 suffixes - though the M3/57T variant is commercial-grade only.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating range for protected circuitry. |
| VBR min/max | 26.7 V / 29.5 V at 1.0 mA - Verified breakdown threshold ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 38.9 V at 38.6 A - Clamped voltage under 1500 W 10/1000 µs surge; limits stress on downstream ICs or MOSFETs. |
| PPPM | 1500 W - Peak transient power handling capacity; supports robust protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges. |
| IPPM | 38.6 A - Peak pulse current capability at rated clamping voltage; determines minimum trace width and PCB copper area required. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive or high-ambient industrial environments. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 8.0 mm × 8.0 mm thermal pad footprint for reliable heat dissipation. |
Pinout & Package
SMCJ24CA-M3/57T uses the SMC (DO-214AB) package: a molded plastic case with two coplanar matte tin-plated leads, no polarity marking (bidirectional), and UL 94 V-0 flammability rating. Mounting requires 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal for rated power derating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative half-cycle) | Conducts during negative voltage excursions; connects to line being protected. |
| Cathode | Transient current entry (positive half-cycle) | Conducts during positive voltage excursions; connects to same line as Anode - symmetric bidirectional path. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), or ungrounded power rails without polarity concerns. |
| 1500 W peak pulse power | Withstands high-energy transients such as load dump (automotive) or lightning-induced surges (industrial Ethernet) without failure. |
| Low clamping ratio (VC/VWM = 1.62) | Minimizes overvoltage exposure to protected ICs - critical for 3.3 V or 5 V logic interfacing with 24 V systems. |
| Halogen-free & RoHS-compliant (M3) | Meets environmental compliance requirements for global electronics manufacturing and end-of-life recycling. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking - simplifies SMT assembly and reduces production risk. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive switching spikes in 12 V/24 V vehicle subsystems. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across signal/power pair upstream of interface IC. Use Value: Limits transient voltage to ≤38.9 V, preventing latch-up or gate oxide damage in 5 V tolerant transceivers while maintaining signal integrity. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to relay coil flyback and motor drive noise in factory automation cabinets. IC Role / Device Role / Timing Role: Primary surge suppression device on 24 V DC input terminals before optocoupler or Schmitt trigger conditioning stage. Use Value: Absorbs up to 1500 W surges without degradation, ensuring >100,000 surge cycles per IEC 61000-4-5 Level 4 compliance testing. |
| Telecom Line Interface | Consumer Appliance Power Input |
Use Scenario: Shielding RS-485 transceivers in base station backhaul links from ESD and induced lightning surges on long outdoor cable runs. IC Role / Device Role / Timing Role: Differential-line TVS connected between A/B lines and ground, leveraging bidirectional symmetry for common-mode suppression. Use Value: Clamps both polarities identically (VBR match ±0.5 V), preserving differential signaling margin and minimizing skew during surge events. |
Use Scenario: Guarding AC-DC adapter primary-side rectifier outputs and secondary-side 24 V rails in smart home hubs against mains-borne surges and EFT bursts. IC Role / Device Role / Timing Role: Secondary-side transient suppressor on regulated 24 V supply rail feeding MCU and wireless SoC. Use Value: Fast response (<1 ps) and low leakage (<1 µA) prevent standby current increase while blocking >1 kV transients per IEC 61000-4-4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24CA-E3/61T | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher VC/VWM ratio (1.71), non-halogen-free (E3). | Limited to lower-energy threats (IEC 61000-4-2 ESD only); unsuitable for load dump or lightning-level surges. | Select when space-constrained and surge energy <400 W; not drop-in for SMCJ24CA-M3/57T's 1500 W requirement. |
| SMCJ24A-M3/57T | Unidirectional version; identical VWM, VBR, VC, and PPPM but asymmetric conduction (cathode-marked). | Requires correct polarity placement; cannot protect AC or floating signals without external diode pairing. | Choose only for DC-only lines where polarity is fixed and reverse conduction is unnecessary. |
Compared with SMAJ24CA-E3/61T and SMCJ24A-M3/57T, the SMCJ24CA-M3/57T uniquely delivers 1500 W bidirectional clamping in a thermally robust SMC package with halogen-free compliance - essential for automotive and industrial surge immunity where polarity independence and high-energy handling are mandatory.
Availability
SMCJ24CA-M3/57T is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer appliance power rails requiring stable component supply and full compliance with RoHS and halogen-free mandates.
Supply support for SMCJ24CA-M3/57T 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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and AEC-Q qualification.
The SMCJ series was developed specifically for high-power transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where 1500 W surge immunity and bidirectional symmetry are critical system requirements.
FAQ
What is the clamping voltage of SMCJ24CA-M3/57T under a 10/1000 µs surge?
The SMCJ24CA-M3/57T clamps to a maximum of 38.9 V when subjected to its rated 38.6 A peak pulse current (IPPM) under a 10/1000 µs waveform. This value is guaranteed per Vishay's datasheet (Document Number: 88394, Rev. 09-Jan-2024) and defines the upper voltage limit imposed on protected circuitry during surge events. The SMCJ24CA-M3/57T maintains this clamping performance across its full operating temperature range.
Is SMCJ24CA-M3/57T suitable for automotive applications?
The SMCJ24CA-M3/57T is halogen-free and RoHS-compliant but is specified as commercial-grade (M3 suffix), not AEC-Q101 qualified. For production automotive use, Vishay offers the HM3 variant (e.g., SMCJ24CAHM3_A/H). However, the SMCJ24CA-M3/57T remains widely used in automotive prototyping, infotainment accessories, and non-safety-critical subsystems where full qualification is not mandated. Always verify compliance requirements before final design-in of SMCJ24CA-M3/57T.
How does the bidirectional nature of SMCJ24CA-M3/57T affect PCB layout?
The SMCJ24CA-M3/57T has no polarity marking and conducts identically in both directions, so PCB layout requires no orientation alignment - either lead may connect to the line being protected. This simplifies placement and eliminates risk of reverse installation. Layout must still follow Vishay's recommended 8.0 mm × 8.0 mm copper pad per terminal to sustain 1500 W surge ratings. No additional series components or grounding topology changes are needed due to its symmetry.
What is the maximum leakage current of SMCJ24CA-M3/57T at its standoff voltage?
At its 24 V standoff voltage (VWM), the SMCJ24CA-M3/57T exhibits a maximum reverse leakage current (ID) of 1.0 µA at 25 °C, per the Vishay datasheet. This ultra-low leakage ensures minimal impact on battery-powered or high-impedance sensor circuits. Leakage increases with temperature but remains below 10 µA up to 125 °C, preserving signal integrity in demanding environments where SMCJ24CA-M3/57T is deployed.
Can SMCJ24CA-M3/57T replace SMCJ24A-M3/57T in an existing design?
No - SMCJ24CA-M3/57T is bidirectional while SMCJ24A-M3/57T is unidirectional; they are not functionally interchangeable without circuit review. Replacing the unidirectional part with SMCJ24CA-M3/57T removes polarity constraints but may alter surge path impedance and grounding behavior. If the original design relies on cathode-anode directionality (e.g., for DC bias blocking), substituting SMCJ24CA-M3/57T could compromise protection. Always validate transient response and DC operating point when swapping SMCJ24CA-M3/57T for SMCJ24A-M3/57T.
SMCJ24CA-M3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- 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 (SMC)
SMCJ24CA-M3/57T FAQ
1.How can I place an order for SMCJ24CA-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ24CA-M3/57T 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 SMCJ24CA-M3/57T reliable?
The price and inventory of SMCJ24CA-M3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ24CA-M3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ24CA-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ24CA-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ24CA-M3/57T?
SMCJ24CA-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ24CA-M3/57T 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 SMCJ24CA-M3/57T?
For technical support, including SMCJ24CA-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ24CA-M3/57T requirements.
6.How does Aetrix verify that SMCJ24CA-M3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ24CA-M3/57T 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 SMCJ24CA-M3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ24CA-M3/57T?
All SMCJ24CA-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ24CA-M3/57T, 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 SMCJ24CA-M3/57T part is unused and in its original packaging.
Return procedure for SMCJ24CA-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ24CA-M3/57T Tags
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