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Vishay General Semiconductor - Diodes Division 1.5SMC24A-M3/9AT
- Part No.:
- 1.5SMC24A-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC24A-M3/9AT.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:9,286
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Product details
Overview
1.5SMC24A-M3/9AT from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 24 V breakdown voltage (VBR = 22.8–25.2 V at IT = 1.0 mA), 20.5 V stand-off voltage (VWM), 33.2 V 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 and industrial power supply rails.
For engineers reviewing the 1.5SMC24A-M3/9AT datasheet, 1.5SMC24A-M3/9AT pinout, 1.5SMC24A-M3/9AT application, or 1.5SMC24A-M3/9AT equivalent, key selection criteria include unidirectional polarity, SMC (DO-214AB) package compatibility, clamping performance under repetitive transients, thermal derating above 25 °C, and halogen-free RoHS compliance per M3 suffix.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VWM (20.5 V), it transitions rapidly from high-impedance to low-impedance state, diverting surge current away from downstream circuitry. Its glass-passivated junction ensures stable breakdown and low leakage (<1.0 µA at VWM).
Designed for transient suppression per IEC 61000-4-2 (ESD) and IEC 61000-4-4 (EFT), it delivers 1500 W peak pulse power with <1 ns response time and 0.094 %/°C temperature coefficient of VBR. Thermal resistance is 75 °C/W (junction-to-ambient) on standard 8.0 mm × 8.0 mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 22.8 V / 25.2 V at 1.0 mA test current - defines precise conduction onset for reliable overvoltage triggering |
| VWM | 20.5 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 33.2 V at 45.2 A - clamped voltage during 10/1000 µs surge, limiting stress on protected ICs |
| PPPM | 1500 W - peak pulse power handling capacity under standardized surge waveform |
| Junction Temp Range | −65 °C to +150 °C - supports operation in under-hood automotive and industrial environments |
| Package | SMC (DO-214AB) - surface-mount outline with 3.2 mm min. cathode band width and 7.75 mm max. body length |
| Compliance | Halogen-free, RoHS-compliant (M3 suffix); meets JESD201 Class 2 whisker resistance |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads; cathode indicated by black band on one end. Mounting requires 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal for rated power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse surge return path | Connected to system ground or low-impedance return in unidirectional clamp configuration |
| Cathode | Reverse voltage sensing / Surge current sink | Connected to protected line; clamps when voltage exceeds VWM, shunting energy to anode |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables protection against severe lightning-induced surges (IEC 61000-4-5 Level 3) without derating on standard PCB layout |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes voltage overshoot during transients, preserving margin for 24 V logic and MCU I/O rails |
| 0.094 %/°C VBR tempco | Ensures predictable clamping threshold across −40 °C to +125 °C ambient operating range |
| MSL Level 1 (260 °C peak reflow) | Supports single-pass lead-free reflow assembly without moisture sensitivity concerns |
| AEC-Q101 qualified option available | HE3/HM3 variants meet automotive reliability requirements; M3 suffix confirms halogen-free commercial grade |
Applications
| Automotive Sensor Protection | Industrial Power Input Stage |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between signal line and chassis ground, activated within nanoseconds of overvoltage event. Use Value: Limits induced voltage to ≤33.2 V during 45.2 A transients, preventing latch-up or gate oxide damage in 24 V automotive ICs. |
Use Scenario: Safeguarding 24 V DC input rails of PLC modules and motor drives against inductive switching spikes and EFT bursts. IC Role / Device Role / Timing Role: Primary front-end TVS in series with fuse and common-mode choke, absorbing >90 % of surge energy before downstream regulators. Use Value: Withstands 1500 W pulses at 0.01 % duty cycle, enabling robust field deployment without thermal runaway on standard FR-4. |
| Telecom Line Interface | Consumer Power Adapter Output |
|
Use Scenario: Shielding Ethernet PHY power pins and PoE injectors from AC-line coupled surges and hot-swap transients. IC Role / Device Role / Timing Role: Standoff-rated TVS (20.5 V) placed after DC-DC converter output, clamping fast-rising edges before reaching Ethernet magnetics. Use Value: 1.0 µA leakage at VWM avoids quiescent current penalty; 33.2 V clamping preserves 24 V PoE Type 2 compliance margin. |
Use Scenario: Secondary-side overvoltage protection in 24 V wall adapters for smart home hubs and security cameras. IC Role / Device Role / Timing Role: Final-stage TVS on regulated output, triggered only during fault conditions (e.g., feedback loop failure or rectifier short). Use Value: Halogen-free M3 construction meets IEC 62368-1 flammability and environmental requirements for consumer end-products. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24A | Lower PPPM (600 W), same VWM/VC, SMB (DO-214AA) package - 30 % smaller footprint, 40 % lower surge rating | Better suited for space-constrained consumer ports; insufficient for automotive load-dump immunity | Select SMBJ24A only when board area is critical and surge threat level is limited to IEC 61000-4-2/4-4 |
| 1.5KE24A | Through-hole TO-204AE (DO-201AE) package, identical electrical specs but higher RθJA (100 °C/W), no MSL Level 1 rating | Requires wave soldering; unsuitable for mixed-technology SMT lines or high-reliability reflow processes | Choose 1.5KE24A only for legacy through-hole designs or prototyping where manual assembly is acceptable |
Compared with SMBJ24A and 1.5KE24A, the 1.5SMC24A-M3/9AT uniquely balances 1500 W surge capacity, SMC surface-mount scalability, halogen-free compliance, and automotive-ready thermal performance - making it optimal for volume-manufactured 24 V embedded systems requiring IPC-A-610 Class 2/3 assembly.
Availability
1.5SMC24A-M3/9AT is available at Aetrix Electronics and suitable for automotive sensor modules, industrial 24 V power supplies, telecom line interfaces, and consumer adapter outputs requiring stable component supply across multi-year production cycles.
Supply support for 1.5SMC24A-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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5SMC Series was engineered for high-power, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where compact size, repeatable clamping, and long-term stability are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC24A-M3/9AT under maximum rated surge current?
The 1.5SMC24A-M3/9AT exhibits a maximum clamping voltage (VC) of 33.2 V when subjected to its rated peak pulse current (IPPM) of 45.2 A using a 10/1000 µs waveform. This value is measured at TA = 25 °C on specified 8.0 mm × 8.0 mm copper pads and represents the upper limit of voltage imposed on protected circuitry during worst-case transient events.
Is the 1.5SMC24A-M3/9AT suitable for automotive applications?
The 1.5SMC24A-M3/9AT itself is a commercial-grade halogen-free part (M3 suffix); however, the 1.5SMC24A-HM3 variant is AEC-Q101 qualified for automotive use. While the 1.5SMC24A-M3/9AT shares identical electrical and thermal characteristics, it lacks formal automotive qualification documentation - engineers deploying 1.5SMC24A-M3/9AT in automotive contexts must perform independent reliability validation per their OEM's requirements.
What does the "M3" suffix indicate in 1.5SMC24A-M3/9AT?
The "M3" suffix in 1.5SMC24A-M3/9AT denotes halogen-free, RoHS-compliant construction meeting JEDEC JESD201 Class 2 whisker resistance and UL 94 V-0 flammability standards. It distinguishes this variant from E3 (RoHS-compliant but not halogen-free) and HM3 (AEC-Q101 qualified + halogen-free) versions - all sharing identical electrical performance and SMC package dimensions.
How does the 1.5SMC24A-M3/9AT compare to bidirectional TVS diodes like 1.5SMC24CA?
The 1.5SMC24A-M3/9AT is unidirectional and intended for DC line protection with defined polarity (cathode marked), whereas 1.5SMC24CA is bidirectional and used in AC-coupled or polarity-agnostic paths. Their VBR, VWM, and VC values differ: 1.5SMC24CA has symmetric breakdown (±22.8–25.2 V) and higher VWM (20.5 V per direction), but identical PPPM and package. The 1.5SMC24A-M3/9AT cannot replace 1.5SMC24CA in AC applications without circuit redesign.
What is the maximum printed circuit board pad size required for full 1500 W rating of the 1.5SMC24A-M3/9AT?
Full 1500 W peak pulse power rating for the 1.5SMC24A-M3/9AT requires mounting on minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, as specified in Vishay Document 88303. Reducing pad area increases thermal impedance, causing premature thermal runaway during repetitive surges - derating curves in Figure 2 show up to 40 % power loss at 50 °C ambient with sub-optimal layout.
1.5SMC24A-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:
- 1
- Bidirectional Channels:
- -
- 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)
1.5SMC24A-M3/9AT FAQ
1.How can I place an order for 1.5SMC24A-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC24A-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 1.5SMC24A-M3/9AT reliable?
The price and inventory of 1.5SMC24A-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 1.5SMC24A-M3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC24A-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC24A-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC24A-M3/9AT?
1.5SMC24A-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC24A-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 1.5SMC24A-M3/9AT?
For technical support, including 1.5SMC24A-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC24A-M3/9AT requirements.
6.How does Aetrix verify that 1.5SMC24A-M3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC24A-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 1.5SMC24A-M3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC24A-M3/9AT?
All 1.5SMC24A-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC24A-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 1.5SMC24A-M3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC24A-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC24A-M3/9AT Tags
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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