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Vishay General Semiconductor - Diodes Division 1.5SMC12CA-M3/9AT
- Part No.:
- 1.5SMC12CA-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC12CA-M3/9AT.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:8,310
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Product details
Overview
1.5SMC12CA-M3/9AT 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 12 V breakdown voltage (VBR = 11.4–12.6 V at 1 mA), 10.2 V stand-off voltage (VWM), clamps to ≤16.7 V at 89.8 A peak pulse current (10/1000 µs), and delivers 1500 W peak pulse power - deployed in automotive sensor interfaces, industrial I/O protection, and telecom line surge suppression.
For engineers reviewing the 1.5SMC12CA-M3/9AT datasheet, 1.5SMC12CA-M3/9AT pinout, 1.5SMC12CA-M3/9AT application, or 1.5SMC12CA-M3/9AT equivalent, this device serves as a halogen-free, RoHS-compliant, bidirectional TVS with MSL Level 1 rating, optimized for automated SMT placement on PCBs requiring high-reliability transient immunity without polarity constraints.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling protection of AC-coupled or floating signal paths without cathode/anode orientation concerns. Its glass-passivated junction ensures stable clamping performance and low leakage (<5 µA at VWM), while the 10/1000 µs waveform response supports lightning and inductive-switching transient standards per IEC 61000-4-5.
The device uses a DO-214AB (SMC) package with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and achieves thermal resistance of 75 °C/W (junction-to-ambient) on standard 8 mm × 8 mm copper pads - enabling reliable operation up to TJ = 150 °C under repetitive surge conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 11.4 V / 12.6 V at IT = 1 mA - defines precise voltage threshold where avalanche conduction begins in either direction |
| VWM | 10.2 V - maximum continuous reverse operating voltage before significant leakage; sets safe margin below VBR |
| VC @ IPPM | ≤16.7 V at 89.8 A (10/1000 µs) - clamping voltage limiting downstream circuit stress during surge events |
| PPPM | 1500 W - peak pulse power handling capacity under standardized surge waveform, critical for IEC 61000-4-5 compliance |
| IPPM | 89.8 A - maximum non-repetitive surge current the device safely shunts without degradation |
| TJ max. | +150 °C - maximum junction temperature enabling use in under-hood automotive or high-ambient industrial environments |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 3.2 mm height and 7.75 mm body length for high-power density layout |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case meeting UL 94 V-0 flammability rating; terminals are matte tin-plated, solderable per J-STD-002; bidirectional construction means no polarity marking - both terminals are electrically symmetrical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Electrically identical to Terminal 2; forms symmetrical avalanche junction - no polarity dependency in circuit layout |
| Terminal 2 | Anode/Cathode (bidirectional) | Matches Terminal 1; enables placement across differential lines, AC signals, or ungrounded buses without orientation check |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC, differential, or floating nodes - eliminates need for dual unidirectional devices or external polarity management |
| 1500 W peak pulse power | Meets IEC 61000-4-5 Level 4 surge immunity requirements for industrial and automotive applications without derating |
| MSL Level 1 (260 °C) | Supports lead-free reflow assembly without moisture sensitivity concerns - no baking required prior to SMT processing |
| Halogen-free & RoHS-compliant | Fulfills EU RoHS Directive 2011/65/EU and JEDEC JS709C material restrictions - suitable for green manufacturing programs |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients - improves protection margin for sensitive 3.3 V or 5 V logic interfaces |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting CAN FD or LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed across signal pair or supply rail to clamp transients before they reach interface ICs. Use Value: Prevents latch-up or permanent damage to 5 V tolerant transceivers during 12 V system load dump events (ISO 7637-2 Pulse 5a). |
Use Scenario: Shielding PLC digital input modules from induced surges on 24 V DC field wiring exposed to motor switching noise. IC Role / Device Role / Timing Role: Primary surge shunt element located at connector entry point, upstream of optocoupler or level-shifter inputs. Use Value: Limits transient voltage to <16.7 V, ensuring safe operation of 24 V-rated input comparators and preventing false triggering. |
| Telecom Line Interface | Consumer USB Port Protection |
Use Scenario: Safeguarding Ethernet PHY or xDSL line drivers against lightning-induced surges on outdoor-facing telecom ports. IC Role / Device Role / Timing Role: First-line defense component mounted directly at RJ-45 jack, clamping common-mode transients on twisted-pair lines. Use Value: Withstands 1500 W pulses while maintaining <1 pF junction capacitance - avoids signal integrity degradation at 100 Mbps+ data rates. |
Use Scenario: Adding secondary surge protection to USB 2.0 VBUS and D+/D− lines in portable chargers or docking stations. IC Role / Device Role / Timing Role: Low-capacitance bidirectional suppressor placed after primary fuse and upstream of USB switch ICs. Use Value: Clamps ESD events (IEC 61000-4-2 ±15 kV contact) to <16.7 V without distorting high-speed data eye diagrams. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12CA | Lower peak power (600 W), same VBR range and DO-214AA package | Not suitable for IEC 61000-4-5 Level 4; limited to lower-energy transients | Select when board space is constrained and surge energy is ≤600 W - requires verification of system-level test margin |
| 1.5KE12CA | Through-hole TO-204AE (DO-15) package; identical electrical specs but incompatible with SMT assembly | Requires manual or wave-solder process; unsuitable for high-density automated production | Choose only for legacy through-hole designs or prototyping where rework flexibility outweighs production efficiency |
Compared with SMBJ12CA and 1.5KE12CA, the 1.5SMC12CA-M3/9AT uniquely combines 1500 W surge capability, SMC surface-mount compatibility, and bidirectional symmetry - making it the preferred choice for automotive and industrial SMT platforms demanding full IEC 61000-4-5 compliance without layout compromise.
Availability
1.5SMC12CA-M3/9AT is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O conditioning, and telecom line interface applications requiring stable component supply, long-term lifecycle support, and halogen-free compliance.
Supply support for 1.5SMC12CA-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, power efficiency, and AEC-Q qualification.
The 1.5SMC Series was engineered specifically for high-energy transient suppression in automotive, industrial, and telecom systems - delivering consistent clamping performance, low leakage, and robust SMT manufacturability across extended temperature ranges.
FAQ
What does the "CA" suffix indicate in 1.5SMC12CA-M3/9AT?
The "CA" suffix in 1.5SMC12CA-M3/9AT denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression in both forward and reverse directions, with no cathode marking required. This distinguishes it from unidirectional variants (e.g., 1.5SMC12A-M3/9AT) that require correct polarity orientation during placement. The 1.5SMC12CA-M3/9AT is ideal for protecting AC-coupled, differential, or floating signal paths where polarity cannot be guaranteed.
Is 1.5SMC12CA-M3/9AT AEC-Q101 qualified?
No - the 1.5SMC12CA-M3/9AT is not AEC-Q101 qualified. It carries the "M3" halogen-free, RoHS-compliant commercial-grade suffix. For automotive-qualified versions, Vishay offers the 1.5SMC12CAHM3_A/I variant (with "HM3" and revision code "A"), which meets AEC-Q101 stress testing requirements. Always verify the full ordering code and consult the official Vishay datasheet revision to confirm qualification status for 1.5SMC12CA-M3/9AT.
What is the maximum clamping voltage of 1.5SMC12CA-M3/9AT under surge conditions?
The maximum clamping voltage (VC) of 1.5SMC12CA-M3/9AT is 16.7 V when subjected to its rated peak pulse current of 89.8 A using the standardized 10/1000 µs waveform. This value is measured at the device terminals and represents the upper limit of voltage seen by downstream circuitry during worst-case transient events - critical for ensuring compatibility with 12 V nominal systems and 15 V absolute maximum-rated ICs.
Can 1.5SMC12CA-M3/9AT replace a unidirectional TVS like 1.5SMC12A-M3/9AT?
Yes, 1.5SMC12CA-M3/9AT can replace 1.5SMC12A-M3/9AT in most applications - but only if bidirectional protection is acceptable and the circuit does not rely on unidirectional forward conduction (e.g., DC power rail polarity enforcement). Since the 1.5SMC12CA-M3/9AT has identical VBR, VWM, and PPPM specs, it offers equal surge suppression capability without polarity constraints. However, it cannot provide rectification or DC blocking functionality.
What is the thermal resistance of 1.5SMC12CA-M3/9AT, and how does it affect PCB layout?
The 1.5SMC12CA-M3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. This value assumes minimum recommended pad layout per Vishay's datasheet - underscoring the need for adequate copper area to maintain TJ ≤ 150 °C during repetitive surge events. Reducing pad size increases RθJA, risking thermal runaway; therefore, PCB layout must strictly follow the 0.31″ × 0.31″ copper pad guideline for reliable 1.5SMC12CA-M3/9AT operation.
1.5SMC12CA-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):
- 10.2V
- Voltage - Breakdown (Min):
- 11.4V
- Voltage - Clamping (Max) @ Ipp:
- 16.7V
- Current - Peak Pulse (10/1000µs):
- 89.8A
- 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)
1.5SMC12CA-M3/9AT FAQ
1.How can I place an order for 1.5SMC12CA-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC12CA-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 1.5SMC12CA-M3/9AT reliable?
The price and inventory of 1.5SMC12CA-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 1.5SMC12CA-M3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC12CA-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC12CA-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC12CA-M3/9AT?
1.5SMC12CA-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC12CA-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 1.5SMC12CA-M3/9AT?
For technical support, including 1.5SMC12CA-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC12CA-M3/9AT requirements.
6.How does Aetrix verify that 1.5SMC12CA-M3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC12CA-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 1.5SMC12CA-M3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC12CA-M3/9AT?
All 1.5SMC12CA-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC12CA-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 1.5SMC12CA-M3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC12CA-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC12CA-M3/9AT Tags
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