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Vishay General Semiconductor - Diodes Division 1.5SMC15CA-M3/9AT
- Part No.:
- 1.5SMC15CA-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC15CA-M3/9AT.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:6,498
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Product details
Overview
1.5SMC15CA-M3/9AT from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMC (DO-214AB) package, rated for 1500 W peak pulse power with 10/1000 μs waveform, 15 V breakdown voltage (VBR min/max: 14.3–15.8 V at 1.0 mA), and clamping voltage of 21.2 V at 70.8 A. It protects signal lines and power rails in automotive sensor interfaces and industrial I/O modules against ESD, lightning surges, and inductive switching transients.
For engineers reviewing the 1.5SMC15CA-M3/9AT datasheet, 1.5SMC15CA-M3/9AT pinout, 1.5SMC15CA-M3/9AT application, or 1.5SMC15CA-M3/9AT equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, thermal derating curves, JEDEC-compliant SMC package dimensions, and AEC-Q101-qualified alternatives for automotive-grade design-in.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR, VWM, and VC specifications in forward and reverse directions. Its glass-passivated junction enables fast response time (<1 ns) and low incremental surge resistance, critical for protecting high-speed analog inputs and CAN/LIN bus lines.
Designed for surface-mount assembly on standard PCB copper pads (8.0 mm × 8.0 mm per terminal), it meets MSL Level 1 per J-STD-020, supports 260 °C lead-free reflow, and maintains stable clamping performance over -65 °C to +150 °C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 14.3 V / 15.8 V at 1.0 mA - defines precise voltage threshold where avalanche conduction begins in either polarity |
| VWM | 12.8 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 μA, ensuring no false triggering during normal operation |
| VC @ IPPM | 21.2 V at 70.8 A - clamped voltage during 1500 W transient, limiting downstream IC stress to safe levels |
| PPPM | 1500 W - peak pulse power handling with 10/1000 μs waveform, enabling robust protection against lightning-induced surges |
| TJ max | +150 °C - maximum junction temperature rating, supporting operation in under-hood automotive environments |
| RθJA | 75 °C/W - thermal resistance from junction to ambient, used to calculate safe power dissipation on standard PCB layout |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 3.2 mm minimum body height and 7.75 mm length, compatible with automated pick-and-place |
Pinout & Package
SMC (DO-214AB) package: molded plastic case with matte tin-plated leads, UL 94 V-0 rated compound, polarity-unmarked for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (positive polarity) | Conducts surge current into device during positive transients; symmetrical with cathode in bidirectional mode |
| Cathode | Transient current entry point (negative polarity) | Conducts surge current into device during negative transients; electrically identical to anode for CA-type devices |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both directions - eliminates need for polarity-aware placement in differential or AC-coupled circuits |
| 1500 W peak pulse power | Rated per 10/1000 μs waveform at 0.01% duty cycle - withstands repeated lightning-surge events without degradation |
| Halogen-free & RoHS-compliant | M3 suffix indicates halogen-free molding compound and full RoHS compliance - satisfies environmental requirements for automotive and industrial end equipment |
| AEC-Q101 qualification option | Available as HM3 variant (e.g., 1.5SMC15CAHM3_A/I) - validated for automotive under-hood applications including engine control and ADAS sensors |
| Low clamping ratio | VC/VBR ≈ 1.45 - tight voltage margin between standoff and clamping ensures minimal overvoltage exposure to protected ICs |
Applications
| Automotive Sensor Interface | Industrial PLC Analog Input |
|---|---|
Use Scenario: Protecting LIN bus transceivers and temperature/pressure sensor outputs from load-dump and battery-reverse transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point, shunting surge energy before reaching signal conditioning circuitry. Use Value: Maintains 12.8 V standoff while clamping 70.8 A surges to 21.2 V, preventing damage to 5 V or 3.3 V sensor interface ICs. |
Use Scenario: Safeguarding 4–20 mA current-loop inputs in programmable logic controllers against field-wiring faults and electrostatic discharge. IC Role / Device Role / Timing Role: Primary transient suppressor mounted adjacent to input terminals, absorbing >1 kV ESD events per IEC 61000-4-2 Level 4. Use Value: Fast <1 ns response ensures clamping occurs before sensitive op-amps or ADCs experience overvoltage stress. |
| Telecom Line Card Protection | Consumer USB Port ESD Guard |
Use Scenario: Shielding Ethernet PHY interfaces and PoE injectors from induced surges on twisted-pair cabling in enterprise switches. IC Role / Device Role / Timing Role: Secondary-level protector downstream of gas discharge tubes, handling residual transients after coarse suppression. Use Value: 1500 W rating allows absorption of multiple 10/1000 μs surges without parameter shift, extending system service life. |
Use Scenario: Adding robust ESD immunity to USB 2.0 data lines in smart home hubs and portable media players. IC Role / Device Role / Timing Role: Low-capacitance TVS (typ. <100 pF at 0 V) placed inline with D+/D− traces to avoid signal integrity degradation. Use Value: Bidirectional symmetry eliminates orientation concerns during high-volume SMT assembly, reducing manufacturing defects. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15CA | Lower peak power (600 W), same VBR (14.3–15.8 V), SMB package (smaller footprint, higher RθJA) | Preferred for space-constrained consumer electronics where 1500 W surge margin is not required | Select when board area is limited and surge threat level is moderate (e.g., IEC 61000-4-5 Level 3) |
| 1.5SMC15CAHM3_A/I | Identical electrical specs; adds AEC-Q101 qualification, halogen-free construction, and automotive traceability | Required for automotive OEM designs needing PPAP documentation and extended temperature validation | Choose for automotive production programs where qualification and supply-chain traceability are mandatory |
Compared with 1.5SMC15CA-M3/9AT, SMBJ15CA trades surge capacity for compactness, while 1.5SMC15CAHM3_A/I adds automotive qualification without altering clamping performance-enabling direct upgrade paths in safety-critical systems.
Availability
1.5SMC15CA-M3/9AT is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O conditioning, telecom line card surge hardening, and consumer USB port ESD guard requiring stable component supply across multi-year production cycles.
Supply support for 1.5SMC15CA-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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for industrial, automotive, and computing markets.
The 1.5SMC Series was engineered to deliver high-power transient suppression in standard SMC packages for cost-sensitive, high-volume applications demanding AEC-Q101 readiness and halogen-free compliance.
FAQ
What does the "CA" suffix mean in 1.5SMC15CA-M3/9AT?
The "CA" suffix in 1.5SMC15CA-M3/9AT denotes a bidirectional Transient Voltage Suppressor. Unlike unidirectional variants (e.g., 1.5SMC15A), the CA version provides symmetrical clamping in both polarities-no cathode marking, identical VBR, VC, and IPPM values for positive and negative transients. This makes 1.5SMC15CA-M3/9AT ideal for AC-coupled lines, differential buses, and applications where polarity cannot be guaranteed during surge events.
How does the M3 suffix affect the 1.5SMC15CA-M3/9AT specification?
The M3 suffix in 1.5SMC15CA-M3/9AT indicates halogen-free, RoHS-compliant construction with matte tin-plated leads meeting JESD 201 Class 2 whisker resistance. It does not alter electrical parameters-VBR, VC, and PPPM remain identical to E3-suffix versions-but ensures compliance with environmental regulations for automotive and industrial end equipment. The "9AT" denotes 3500-unit tape-and-reel packaging on 13-inch reels.
What is the maximum clamping voltage of 1.5SMC15CA-M3/9AT under surge conditions?
The maximum clamping voltage (VC) of 1.5SMC15CA-M3/9AT is 21.2 V, measured at its peak pulse current (IPPM) of 70.8 A using a 10/1000 μs waveform. This value represents the upper limit of voltage seen by downstream circuitry during worst-case transient events. At lower surge currents (e.g., 10 A), VC drops to ~16.5 V, confirming strong clamping linearity essential for protecting 3.3 V or 5 V logic interfaces.
Can 1.5SMC15CA-M3/9AT replace unidirectional TVS diodes like 1.5SMC15A?
No-1.5SMC15CA-M3/9AT cannot directly replace unidirectional 1.5SMC15A because their polarity behavior differs fundamentally. While both share identical VBR (14.3–15.8 V) and VC (21.2 V), the unidirectional 1.5SMC15A conducts only in reverse bias and requires correct cathode orientation. Substituting 1.5SMC15CA-M3/9AT in a unidirectional design introduces unnecessary conduction during forward transients and may compromise protection integrity. Always verify circuit topology before interchange.
Is 1.5SMC15CA-M3/9AT qualified for automotive applications?
The base 1.5SMC15CA-M3/9AT is commercial-grade and not AEC-Q101 qualified. However, Vishay offers the functionally identical 1.5SMC15CAHM3_A/I variant-same electrical specs, halogen-free, RoHS-compliant, and fully AEC-Q101 qualified for automotive under-hood use. For production automotive programs, specify the HM3 suffix; 1.5SMC15CA-M3/9AT remains suitable for industrial and consumer applications where qualification is not mandated.
1.5SMC15CA-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):
- 12.8V
- Voltage - Breakdown (Min):
- 14.3V
- Voltage - Clamping (Max) @ Ipp:
- 21.2V
- Current - Peak Pulse (10/1000µs):
- 70.8A
- 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)
1.5SMC15CA-M3/9AT FAQ
1.How can I place an order for 1.5SMC15CA-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC15CA-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 1.5SMC15CA-M3/9AT reliable?
The price and inventory of 1.5SMC15CA-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 1.5SMC15CA-M3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC15CA-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC15CA-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC15CA-M3/9AT?
1.5SMC15CA-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC15CA-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 1.5SMC15CA-M3/9AT?
For technical support, including 1.5SMC15CA-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC15CA-M3/9AT requirements.
6.How does Aetrix verify that 1.5SMC15CA-M3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC15CA-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 1.5SMC15CA-M3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC15CA-M3/9AT?
All 1.5SMC15CA-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC15CA-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 1.5SMC15CA-M3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC15CA-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC15CA-M3/9AT Tags
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