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Vishay General Semiconductor - Diodes Division 1.5SMC24CAHM3_A/H
- Part No.:
- 1.5SMC24CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC24CAHM3_A/H.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,007
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Product details
Overview
1.5SMC24CAHM3_A/H 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), 26.7–29.5 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (10/1000 μs), clamping voltage of 33.2 V at 45.2 A, and operates across –65 °C to +150 °C junction temperature. It protects signal lines and power rails in automotive sensor interfaces against lightning-induced transients and inductive switching spikes.
For engineers reviewing the 1.5SMC24CAHM3_A/H datasheet, 1.5SMC24CAHM3_A/H pinout, 1.5SMC24CAHM3_A/H application, or 1.5SMC24CAHM3_A/H equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), bidirectional clamping behavior, and halogen-free RoHS-compliant construction - all critical for automotive-grade ESD/surge design validation.
Technical Context
The 1.5SMC24CAHM3_A/H uses a glass-passivated silicon junction optimized for fast response (<1 ns) and low incremental surge resistance, enabling precise clamping during transient events. Its bidirectional architecture provides symmetrical protection without polarity sensitivity, making it suitable for AC-coupled or differential signal paths where reverse voltage stress occurs in both directions.
Rated for 1500 W peak pulse power under the standardized 10/1000 μs waveform with 0.01% duty cycle, it sustains repetitive surges when thermally managed on recommended 8.0 mm × 8.0 mm copper pads. The device meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101 for automotive underhood and body electronics applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 24 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 26.7–29.5 V at 1 mA - Confirmed minimum/maximum voltage at which device enters avalanche conduction; ensures predictable turn-on threshold. |
| VC (Clamping Voltage) | 33.2 V at 45.2 A - Maximum voltage seen by protected circuit during full-rated 1500 W transient; determines downstream component voltage stress. |
| PPPM (Peak Pulse Power) | 1500 W - Surge energy handling capacity under 10/1000 μs waveform; validates robustness against IEC 61000-4-5 Level 4 surges. |
| TJ max. | +150 °C - Maximum junction temperature rating; supports operation in under-hood automotive environments with minimal derating. |
| RθJA | 75 °C/W - Thermal resistance from junction to ambient; informs PCB copper pad sizing and layout for thermal reliability. |
| AEC-Q101 Qualified | Yes - Validated for automotive electronic modules requiring long-term reliability under temperature cycling, humidity, and mechanical stress. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. No polarity marking - bidirectional configuration eliminates cathode/anode orientation concerns during placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity; symmetric conduction enables AC line protection without orientation constraints. |
| Terminal 2 | Anode / Cathode (bidirectional) | Electrically identical to Terminal 1; dual-terminal symmetry simplifies PCB routing and eliminates assembly errors from polarity misalignment. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., CAN, LIN), or ungrounded power rails without external polarity management. |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 4th-level surge (4 kV line-to-earth, 2 kV line-to-line) when mounted on 8 mm × 8 mm copper pads. |
| AEC-Q101 qualification | Validates suitability for automotive body control modules, ADAS sensor interfaces, and infotainment power supplies requiring zero-failure field performance. |
| MSL Level 1 rating | Allows unlimited floor life and reflow compatibility up to 260 °C peak, eliminating bake requirements and supporting high-yield automated assembly. |
| Low clamping ratio (VC/VBR ≈ 1.17) | Minimizes overvoltage exposure to protected ICs - e.g., ensures <33.2 V stress on 3.3 V or 5 V logic during surge, preserving margin vs. absolute maximum ratings. |
Applications
| Automotive Sensor Interface Protection | CAN Bus Transient Suppression |
|---|---|
Use Scenario: Protecting analog output pins of wheel speed sensors, pressure transducers, or temperature sensors exposed to load dump and ISO 7637-2 pulses in vehicle chassis wiring. IC Role / Device Role / Timing Role: Bidirectional TVS placed between sensor signal line and ground to clamp ±200 V transients within nanoseconds, preventing latch-up or gate oxide damage in front-end amplifiers. Use Value: Maintains signal integrity under repeated 1500 W surges while meeting AEC-Q101 lifetime requirements - critical for ASIL-B functional safety compliance. |
Use Scenario: Safeguarding CAN_H and CAN_L lines in automotive ECUs against ESD (IEC 61000-4-2 ±8 kV contact) and coupled surges from nearby solenoid switching. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS connected across differential pair to suppress common-mode transients without distorting 1 Mbps CAN signaling waveform. Use Value: Clamps to ≤33.2 V while adding <1 pF junction capacitance - preserves signal rise/fall times and avoids bit error rate degradation in high-speed CAN FD networks. |
| Industrial PLC Analog Input Protection | Telecom Line Card Surge Guarding |
Use Scenario: Shielding 4–20 mA current loop inputs in programmable logic controllers from induced surges due to relay coil switching or nearby motor drives. IC Role / Device Role / Timing Role: Placed across input terminals to shunt >1 kV transients away from precision op-amps and ADC front-ends, maintaining measurement accuracy after surge events. Use Value: Delivers 1500 W surge handling with <1 ns response - prevents temporary saturation or permanent damage to instrumentation-grade signal conditioning circuits. |
Use Scenario: Protecting Ethernet PHY interface and PoE-powered circuitry in telecom access equipment subjected to lightning-induced surges on RJ45 ports. IC Role / Device Role / Timing Role: Bidirectional TVS installed on each twisted pair (e.g., TX+/TX−, RX+/RX−) to clamp mode-common surges while preserving impedance matching and crosstalk margins. Use Value: Enables compliance with GR-1089-CORE Level 3 (10/700 μs, 6 kV) without compromising 100BASE-TX signal integrity or PoE power delivery stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24CA | Lower peak pulse power (600 W), same VWM/VBR range, SMB (DO-214AA) package - 30% smaller footprint but higher RθJA (110 °C/W). | Acceptable for lower-energy IEC 61000-4-5 Level 2 surges; unsuitable for automotive underhood where 1500 W capability and thermal robustness are mandatory. | Select only for space-constrained consumer or industrial designs with verified lower surge threat profiles and adequate thermal relief. |
| 1.5KE24CA | Through-hole TO-204AE (DO-15) package, identical 1500 W rating and VWM/VBR specs, but no AEC-Q101 qualification or MSL Level 1 rating. | Permitted in non-automotive industrial controls or legacy telecom hardware where surface-mount assembly and automotive qualification are not required. | Choose only when board assembly process mandates through-hole components or when AEC-Q101 compliance is unnecessary for the target application. |
Compared with SMBJ24CA and 1.5KE24CA, the 1.5SMC24CAHM3_A/H uniquely combines AEC-Q101 qualification, SMC package thermal performance (RθJA = 75 °C/W), and 1500 W surge capability - making it the only option among the three validated for automotive-grade surface-mount surge protection with zero layout compromise.
Availability
1.5SMC24CAHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, CAN bus nodes, industrial PLC analog inputs, and telecom line cards requiring stable component supply, halogen-free compliance, and AEC-Q101 assurance.
Supply support for 1.5SMC24CAHM3_A/H 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 surge endurance are non-negotiable.
FAQ
What is the clamping voltage of the 1.5SMC24CAHM3_A/H at its rated peak pulse current?
The 1.5SMC24CAHM3_A/H has a maximum clamping voltage (VC) of 33.2 V at 45.2 A peak pulse current, measured under the standard 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuitry during a full 1500 W transient event and is confirmed in Vishay's datasheet Document Number 88303, Table on page 2.
Is the 1.5SMC24CAHM3_A/H qualified for automotive applications?
Yes, the 1.5SMC24CAHM3_A/H carries AEC-Q101 qualification, as indicated by the "HM3" suffix and confirmed in the Ordering Information table (page 3) of Vishay's 1.5SMC Series datasheet. This certification validates its reliability for automotive body electronics, sensor modules, and infotainment systems subject to extended temperature cycling and mechanical stress.
What does the "CA" suffix mean in 1.5SMC24CAHM3_A/H?
The "CA" suffix in 1.5SMC24CAHM3_A/H denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., "A"), it requires no polarity alignment during PCB placement and is ideal for AC-coupled or differential signal paths such as CAN, LIN, or RS-485.
What is the thermal resistance of the 1.5SMC24CAHM3_A/H, and how does it affect PCB layout?
The 1.5SMC24CAHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. This value directly informs minimum copper area requirements: reducing pad size increases thermal impedance, risking junction overheating during repetitive surges - so adherence to Vishay's layout guidelines is essential for sustained 1500 W performance.
Does the 1.5SMC24CAHM3_A/H have a polarity marking on the package?
No, the 1.5SMC24CAHM3_A/H has no polarity marking because it is a bidirectional TVS diode. As stated in the Mechanical Data section of the datasheet, "no marking on bidirectional types." Both terminals are functionally identical, allowing unrestricted orientation during automated placement and eliminating risk of incorrect installation.
1.5SMC24CAHM3_A/H 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC24CAHM3_A/H FAQ
1.How can I place an order for 1.5SMC24CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC24CAHM3_A/H 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 1.5SMC24CAHM3_A/H reliable?
The price and inventory of 1.5SMC24CAHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC24CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC24CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC24CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC24CAHM3_A/H?
1.5SMC24CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC24CAHM3_A/H 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 1.5SMC24CAHM3_A/H?
For technical support, including 1.5SMC24CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC24CAHM3_A/H requirements.
6.How does Aetrix verify that 1.5SMC24CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC24CAHM3_A/H 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 1.5SMC24CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC24CAHM3_A/H?
All 1.5SMC24CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC24CAHM3_A/H, 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 1.5SMC24CAHM3_A/H part is unused and in its original packaging.
Return procedure for 1.5SMC24CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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