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Vishay General Semiconductor - Diodes Division 1.5SMC24CA-M3/9AT
- Part No.:
- 1.5SMC24CA-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC24CA-M3/9AT.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:7,593
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Product details
Overview
1.5SMC24CA-M3/9AT from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMC (DO-214AB) package, designed for high-energy surge protection. It features a 24 V standoff voltage (VWM), 25.2 V maximum breakdown voltage (VBR), and clamps transients to ≤33.2 V at 45.2 A peak pulse current (IPPM) under 10/1000 μs waveform - enabling robust protection of power rails and signal lines in automotive and industrial control systems.
For engineers reviewing the 1.5SMC24CA-M3/9AT datasheet, 1.5SMC24CA-M3/9AT pinout, 1.5SMC24CA-M3/9AT application, or 1.5SMC24CA-M3/9AT equivalent, this device delivers 1500 W peak pulse power capability, low incremental surge resistance, and AEC-Q101 qualification readiness (via HM3 suffix variants), making it critical for ESD and lightning-induced transient suppression where bidirectional clamping and fast response (<1 ns) are required.
Technical Context
The 1.5SMC24CA-M3/9AT operates as a bidirectional avalanche diode with symmetrical clamping behavior in both polarities, eliminating polarity marking on the case. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repetitive surge stress.
Rated for 1500 W peak pulse power (10/1000 μs), it sustains 45.2 A IPPM while limiting voltage to 33.2 V, delivering a clamping ratio (VC/VWM) of 1.38 - significantly lower than typical MOVs. Thermal resistance is 75 °C/W (junction-to-ambient) on standard 8 mm × 8 mm copper pads, supporting operation up to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 20.5 V - Maximum continuous reverse voltage before conduction begins; defines safe operating margin for 24 V nominal systems. |
| VBR (Breakdown Voltage) | 22.8–25.2 V at 1 mA - Tight tolerance ensures predictable turn-on across production lots and temperature range. |
| VC (Clamping Voltage) | ≤33.2 V at 45.2 A - Limits downstream voltage stress during surge events, protecting 3.3 V/5 V/12 V ICs and MOSFET gates. |
| PPPM (Peak Pulse Power) | 1500 W - Handles high-energy transients like ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 4 surges. |
| IPPM (Peak Pulse Current) | 45.2 A - Validated under standardized 10/1000 μs waveform; enables direct comparison with system-level surge test requirements. |
| TJmax | +150 °C - Supports under-hood automotive and industrial environments without derating below full power. |
| Package | SMC (DO-214AB) - Surface-mount footprint compatible with automated assembly; 7.75 mm × 6.22 mm body with 2.62 mm height. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration with no polarity marking. Cathode/anode terminals are symmetric; both ends function identically in reverse-biased operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (Bidirectional) | Surge current path | Both terminals conduct equally during positive or negative transients; no orientation required during placement. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC lines, differential buses (e.g., RS-485), and floating power domains without polarity concerns. |
| 1500 W peak pulse rating | Meets IEC 61000-4-5 4 kV/2 Ω surge test requirements with margin for repeated exposure in harsh environments. |
| Glass-passivated junction | Ensures stable VBR over time and temperature; eliminates parameter drift seen in epoxy-passivated alternatives. |
| MSL Level 1 (260 °C reflow) | Supports lead-free soldering without preconditioning; compatible with standard SMT reflow profiles. |
| Halogen-free & RoHS-compliant (M3) | Fulfills environmental compliance for automotive and industrial OEMs requiring material declarations per IEC 61249-2-21. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply lines in engine control units (ECUs) and body control modules against load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed at power entry point to limit voltage excursions to <33.2 V during ISO 7637-2 Pulse 5a events. Use Value: Prevents latch-up or permanent damage to microcontrollers, CAN transceivers, and voltage regulators exposed to >100 V transients. |
Use Scenario: Safeguarding analog sensor inputs (e.g., pressure, temperature) connected to PLC analog input cards in factory automation. IC Role / Device Role / Timing Role: Low-capacitance TVS placed directly at connector interface to shunt ESD (IEC 61000-4-2 ±8 kV contact) and fast transients before signal conditioning circuitry. Use Value: Maintains signal integrity by clamping sub-100 ns ESD events without loading the 100 kΩ+ sensor impedance. |
| Telecom DC Power Feeding | Consumer Appliance Motor Drive Protection |
Use Scenario: Securing -48 V DC feeding lines in telecom base station power supplies against lightning-induced surges on outdoor cable runs. IC Role / Device Role / Timing Role: Bidirectional TVS installed upstream of DC/DC converters to absorb 1500 W surges per IEC 61643-21 Class II requirements. Use Value: Eliminates need for series impedance or additional filtering stages due to low dynamic resistance and tight VC specification. |
Use Scenario: Shielding microcontroller GPIOs and gate drivers in washing machine motor control boards from commutation noise generated by BLDC motors. IC Role / Device Role / Timing Role: Localized TVS mounted adjacent to motor driver ICs to suppress <100 ns dv/dt spikes induced by MOSFET switching. Use Value: Reduces electromagnetic emissions and prevents false triggering of overvoltage protection circuits during normal 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 |
|---|---|---|---|
| SMBJ24CA-T3G (onsemi) | Lower PPPM (600 W), same VWM/VC, SMB package (smaller footprint, higher RθJA) | Not suitable for IEC 61000-4-5 Level 4; limited to lower-energy surges in space-constrained consumer designs. | Select when board area is critical and surge energy does not exceed 600 W. |
| 1.5KE24CA (Littelfuse) | Through-hole DO-201 package, identical electrical specs but incompatible with SMT assembly and higher thermal resistance (RθJA ≈ 100 °C/W) | Requires manual insertion or wave soldering; unsuitable for high-volume automated production or thermally demanding layouts. | Choose only for legacy through-hole designs or prototyping where rework flexibility is prioritized over production efficiency. |
Compared with SMBJ24CA-T3G and 1.5KE24CA, the 1.5SMC24CA-M3/9AT uniquely balances 1500 W surge handling, SMC surface-mount compatibility, and halogen-free compliance - making it optimal for automotive-grade, high-reliability SMT production where both performance and manufacturability are non-negotiable.
Availability
1.5SMC24CA-M3/9AT is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLC I/O modules, telecom power supplies, and consumer appliance motor controllers requiring stable component supply across multi-year production cycles.
Supply support for 1.5SMC24CA-M3/9AT 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, power handling, and automotive qualification.
The 1.5SMC Series was engineered specifically for high-power transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where 1500 W surge immunity and AEC-Q101 readiness are mandatory design requirements.
FAQ
What is the clamping voltage of the 1.5SMC24CA-M3/9AT at its rated peak pulse current?
The 1.5SMC24CA-M3/9AT clamps to a maximum of 33.2 V at its rated peak pulse current of 45.2 A under the standard 10/1000 μs waveform. This value is measured per JEDEC standards and guarantees consistent overvoltage limiting across all units, enabling reliable downstream IC protection in 24 V systems without additional voltage-margin calculations.
Is the 1.5SMC24CA-M3/9AT suitable for automotive applications?
Yes - the 1.5SMC24CA-M3/9AT is halogen-free and RoHS-compliant (M3 suffix), and belongs to the AEC-Q101-qualified 1.5SMC family. While the exact M3/9AT variant is commercial-grade, its underlying die and construction meet AEC-Q101 stress test requirements; automotive-grade versions use HM3 suffixes (e.g., 1.5SMC24CAHM3_A/I) with full qualification documentation.
How does the bidirectional configuration of the 1.5SMC24CA-M3/9AT affect PCB layout?
The 1.5SMC24CA-M3/9AT has no polarity marking and functions identically in either orientation, simplifying PCB layout and eliminating risk of incorrect placement. Engineers can route it across differential lines (e.g., RS-485), AC-coupled signals, or ungrounded power domains without directional constraints - reducing design review cycles and assembly errors.
What is the thermal resistance of the 1.5SMC24CA-M3/9AT, and how does it impact power dissipation?
The 1.5SMC24CA-M3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8 mm × 8 mm copper pads. At ambient temperatures up to +85 °C, this allows continuous power dissipation up to 6.5 W - sufficient for managing leakage and minor transients between major surge events without external heatsinking.
Can the 1.5SMC24CA-M3/9AT replace older through-hole TVS diodes like 1.5KE24CA?
No direct replacement - the 1.5SMC24CA-M3/9AT uses an SMC (DO-214AB) surface-mount package, while 1.5KE24CA uses DO-201 axial leads. Though electrically similar, the 1.5SMC24CA-M3/9AT requires different pad layout, reflow profile, and thermal management. Migration demands PCB redesign but gains automated assembly compatibility and improved surge robustness.
1.5SMC24CA-M3/9AT 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-M3/9AT FAQ
1.How can I place an order for 1.5SMC24CA-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC24CA-M3/9AT 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 1.5SMC24CA-M3/9AT reliable?
The price and inventory of 1.5SMC24CA-M3/9AT 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-M3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC24CA-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC24CA-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC24CA-M3/9AT?
1.5SMC24CA-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC24CA-M3/9AT 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 1.5SMC24CA-M3/9AT?
For technical support, including 1.5SMC24CA-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC24CA-M3/9AT requirements.
6.How does Aetrix verify that 1.5SMC24CA-M3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC24CA-M3/9AT 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 1.5SMC24CA-M3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC24CA-M3/9AT?
All 1.5SMC24CA-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC24CA-M3/9AT, 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 1.5SMC24CA-M3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC24CA-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC24CA-M3/9AT Tags
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ESD9B5.0ST5G
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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