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Vishay General Semiconductor - Diodes Division 1.5SMC24CA-M3/57T
- Part No.:
- 1.5SMC24CA-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC24CA-M3/57T.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:5,852
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Product details
Overview
1.5SMC24CA-M3/57T from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 24 V standoff voltage (VWM), 26.7–29.5 V breakdown voltage (VBR) at 1 mA, 33.2 V maximum clamping voltage (VC) at 45.2 A peak pulse current, and 1500 W peak pulse power capability with a 10/1000 μs waveform - deployed in automotive sensor interfaces, industrial I/O modules, and telecom line protection.
For engineers reviewing the 1.5SMC24CA-M3/57T datasheet, 1.5SMC24CA-M3/57T pinout, 1.5SMC24CA-M3/57T application, or 1.5SMC24CA-M3/57T equivalent, this device delivers verified bidirectional clamping performance, halogen-free RoHS compliance, MSL Level 1 moisture sensitivity, and AEC-Q101 qualification readiness - critical for high-reliability board-level surge suppression where polarity-agnostic transient response is required.
Technical Context
The 1.5SMC24CA-M3/57T operates as a silicon avalanche diode with symmetrical bidirectional conduction, enabling identical clamping behavior in both polarities without external polarity management. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 μA at VWM), while its SMC (DO-214AB) package supports automated placement and meets UL 94 V-0 flammability requirements.
Thermally, it exhibits a junction-to-ambient thermal resistance of 75 °C/W and a junction-to-lead resistance of 15 °C/W, allowing effective power dissipation under repetitive surge conditions when mounted on 8.0 mm × 8.0 mm copper pads. The device sustains operation across –65 °C to +150 °C junction temperature range and maintains clamping integrity up to 0.01% duty cycle with 10/1000 μs transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 24 V - Maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 26.7–29.5 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during fast transients. |
| VC (Clamping Voltage) | 33.2 V at 45.2 A (10/1000 μs) - Peak voltage seen by protected circuit during worst-case surge; limits stress on downstream ICs. |
| PPPM (Peak Pulse Power) | 1500 W - Sustained energy absorption capacity per transient event; enables protection against lightning-induced surges. |
| IPPM (Peak Pulse Current) | 45.2 A - Maximum non-repetitive surge current handled without degradation; validated per Fig. 3 waveform. |
| TJmax | +150 °C - Maximum allowable junction temperature; supports operation in under-hood automotive and industrial enclosures. |
| Package | SMC (DO-214AB) - Surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with standard SMT reflow profiles. |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional terminal pair | No polarity marking; terminals are functionally identical - either can connect to line or ground in AC or floating systems. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal/power lines without polarity awareness. |
| 1500 W peak pulse rating | Handles IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) with margin in typical PCB layouts. |
| Halogen-free & RoHS-compliant (M3 suffix) | Meets environmental compliance for automotive and industrial end-equipment without compromising surge performance. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD, inductive kickback), improving system immunity. |
| AEC-Q101 qualification path | Base P/NHM3 variant supports automotive-grade reliability validation; M3/57T shares same die and construction. |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Module |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS placed between signal line and chassis ground to clamp ±100 V transients within 1 ns. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V microcontrollers and signal conditioners exposed to automotive electrical noise. |
Use Scenario: Shielding 24 V DC digital input channels in PLC backplanes from field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Primary overvoltage clamp on each input channel, located upstream of optocoupler or Schmitt trigger input stage. Use Value: Maintains functional safety integrity by limiting transient voltage to <33.2 V, ensuring reliable logic-level recognition under surge stress. |
| Telecom Line Interface | Consumer USB/UART Port Protection |
Use Scenario: Safeguarding RS-485 transceivers and Ethernet PHYs against lightning-induced common-mode surges on outdoor cabling. IC Role / Device Role / Timing Role: Bidirectional TVS connected across differential pair (A/B) and referenced to local ground plane. Use Value: Clamps differential surges to ≤33.2 V while preserving signal integrity up to 10 Mbps due to low capacitance (~200 pF at 0 V). |
Use Scenario: Adding secondary surge protection to USB 2.0 D+/D− or UART TX/RX lines in smart home hubs and portable devices. IC Role / Device Role / Timing Role: Low-capacitance TVS placed immediately at connector entry point to shunt ESD (IEC 61000-4-2 ±15 kV) before signal conditioning ICs. Use Value: Achieves system-level ESD immunity without signal distortion, leveraging 24 V standoff and fast sub-nanosecond response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24CA | Same VWM/VC, but lower PPPM = 600 W; SMB package (smaller footprint, higher RθJA = 85 °C/W). | Preferred for space-constrained consumer PCBs where surge energy is limited to IEC 61000-4-5 Level 2. | Select SMBJ24CA only if layout area is constrained and peak surge energy does not exceed 600 W capability. |
| 1.5KE24CA | Same electrical specs, but axial-leaded DO-15 package; higher mounting inductance, no SMT compatibility. | Suitable for prototyping, through-hole legacy designs, or high-vibration environments where leaded mechanical retention is preferred. | Choose 1.5KE24CA for manual assembly, repair scenarios, or when SMT infrastructure is unavailable. |
Compared with SMBJ24CA and 1.5KE24CA, the 1.5SMC24CA-M3/57T provides optimal balance of 1500 W surge handling, SMT manufacturability, and thermal performance in compact industrial and automotive modules - making it the preferred choice where high-energy transient immunity and production scalability are jointly required.
Availability
1.5SMC24CA-M3/57T is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O conditioning, and telecom line interface applications requiring stable component supply, halogen-free compliance, and AEC-Q101 qualification readiness.
Supply support for 1.5SMC24CA-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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The 1.5SMC Series was engineered specifically for surface-mount transient suppression in harsh environments - delivering consistent clamping performance, robust surge endurance, and qualification-ready variants for mission-critical electronics.
FAQ
What is the clamping voltage of the 1.5SMC24CA-M3/57T under a 10/1000 μs surge?
The 1.5SMC24CA-M3/57T has a maximum clamping voltage (VC) of 33.2 V when subjected to a 10/1000 μs waveform at its rated peak pulse current of 45.2 A. This value is measured per Figure 1 in the Vishay datasheet 88303 and reflects worst-case voltage seen by protected circuitry during standardized surge testing. The 1.5SMC24CA-M3/57T maintains this clamping performance across its full operating temperature range.
Is the 1.5SMC24CA-M3/57T suitable for automotive applications?
Yes - the 1.5SMC24CA-M3/57T uses the same die and construction as the AEC-Q101 qualified HM3 variants (e.g., 1.5SMC24CAHM3_A/H). While the M3/57T suffix itself denotes halogen-free RoHS compliance rather than certified qualification, its design, thermal performance, and surge robustness align with automotive requirements. For production automotive use, specify the HM3-suffixed version; the 1.5SMC24CA-M3/57T serves as a drop-in-compatible commercial-grade alternative with identical electrical specs.
Does the 1.5SMC24CA-M3/57T have polarity markings?
No - the 1.5SMC24CA-M3/57T is a bidirectional TVS diode and carries no cathode band or polarity marking. Its symmetrical structure allows either terminal to be connected to signal or ground, simplifying layout in AC-coupled, floating, or differential systems. This contrasts with unidirectional variants (e.g., 1.5SMC24A-M3/57T), which feature a visible cathode band.
What is the thermal resistance of the 1.5SMC24CA-M3/57T?
The 1.5SMC24CA-M3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and a junction-to-lead resistance (RθJL) of 15 °C/W, measured on 8.0 mm × 8.0 mm copper pads per JEDEC standards. These values enable reliable power dissipation during repetitive surge events and inform heatsinking decisions in high-duty-cycle applications. The 1.5SMC24CA-M3/57T's low RθJL supports efficient heat transfer to PCB copper planes.
How does the 1.5SMC24CA-M3/57T compare to unidirectional TVS diodes like 1.5SMC24A-M3/57T?
The 1.5SMC24CA-M3/57T provides identical VWM, VBR, and VC ratings as its unidirectional counterpart 1.5SMC24A-M3/57T but operates symmetrically in both directions - eliminating the need for polarity-aware routing. Unlike the unidirectional version, the 1.5SMC24CA-M3/57T has no cathode marking and supports AC signal line protection without series blocking diodes. Its leakage current remains ≤1.0 μA at 24 V in either polarity.
1.5SMC24CA-M3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 20.5V
- Voltage - Breakdown (Min):
- 22.8V
- Voltage - Clamping (Max) @ Ipp:
- 33.2V
- Current - Peak Pulse (10/1000µs):
- 45.2A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC24CA-M3/57T FAQ
1.How can I place an order for 1.5SMC24CA-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC24CA-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 1.5SMC24CA-M3/57T reliable?
The price and inventory of 1.5SMC24CA-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 1.5SMC24CA-M3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC24CA-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC24CA-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC24CA-M3/57T?
1.5SMC24CA-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC24CA-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 1.5SMC24CA-M3/57T?
For technical support, including 1.5SMC24CA-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC24CA-M3/57T requirements.
6.How does Aetrix verify that 1.5SMC24CA-M3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC24CA-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 1.5SMC24CA-M3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC24CA-M3/57T?
All 1.5SMC24CA-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC24CA-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 1.5SMC24CA-M3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC24CA-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC24CA-M3/57T Tags
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