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Vishay General Semiconductor - Diodes Division SM15T15CA-M3/9AT
- Part No.:
- SM15T15CA-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T15CA-M3/9AT.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,030
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Product details
Overview
SM15T15CA-M3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 15 V standoff voltage (VWM), and clamping voltage of 21.2 V at 71 A peak pulse current. It protects signal lines and power rails in automotive sensor interfaces and industrial I/O modules against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T15CA-M3/9AT datasheet, SM15T15CA-M3/9AT pinout, SM15T15CA-M3/9AT application, or SM15T15CA-M3/9AT equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification eligibility (via HM3 suffix), low clamping ratio (1.41× VWM), and halogen-free RoHS compliance per M3 suffix.
Technical Context
The SM15T15CA-M3/9AT operates as a bidirectional avalanche diode with symmetrical breakdown behavior in both polarities, enabling protection of AC-coupled or floating signal paths without polarity concerns. Its glass-passivated junction ensures stable VBR (14.3–15.8 V) and low leakage (<1.0 μA at 12.8 V).
Designed for high-energy transient suppression, it delivers 1500 W peak pulse power under 10/1000 μs waveform with thermal resistance RθJA = 75 °C/W and maximum junction temperature of 150 °C. Failure mode under overstress is short circuit, consistent with IEC 61000-4-5 Level 4 compliance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12.8 V - Maximum continuous reverse operating voltage before significant leakage; defines safe working range for 12 V nominal systems. |
| VBR min/max | 14.3 V / 15.8 V - Breakdown occurs within this band at 1 mA test current; ensures reliable triggering across process variation. |
| VC @ IPPM | 21.2 V @ 71 A - Clamped voltage during 10/1000 μs surge; limits downstream IC stress to <21.2 V under worst-case threat. |
| PPPM | 1500 W - Peak pulse power handling capacity; supports protection against IEC 61000-4-5 4 kV/2 Ω combination wave. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments and industrial enclosures. |
| Package | SMC (DO-214AB) - Surface-mount outline with 7.75 mm × 6.22 mm footprint; compatible with automated pick-and-place and reflow soldering. |
Pinout & Package
SM15T15CA-M3/9AT uses a two-terminal SMC (DO-214AB) package with no polarity marking for bidirectional operation. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102, and meet JESD 201 Class 2 whisker resistance.
| 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; device functions identically regardless of PCB placement orientation. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of differential, AC, or floating signal paths (e.g., CAN bus, RS-485, sensor bridges) without polarity-sensitive layout. |
| 1500 W peak pulse power (10/1000 μs) | Meets IEC 61000-4-5 Level 4 (4 kV, 2 Ω source impedance) for industrial and automotive surge immunity. |
| Halogen-free, RoHS-compliant (M3 suffix) | Complies with JEDEC JS709E and IPC-1752A material declarations; supports green manufacturing and end-of-life recycling. |
| Low clamping ratio (VC/VWM = 1.66) | Minimizes overvoltage exposure to protected ICs-critical for 3.3 V/5 V logic and automotive microcontrollers with tight absolute maximum ratings. |
| AEC-Q101 qualification path | Base P/NHM3_X variant available for automotive applications; qualified per stress test conditions including HTGB, HTRB, and TCT. |
Applications
| Automotive Sensor Interface | Industrial I/O Protection |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver inputs and analog sensor outputs (e.g., pressure, temperature) in engine control units and body electronics. IC Role / Device Role: Bidirectional TVS clamp placed between connector and transceiver IC to shunt ESD and load-dump energy. Use Value: Limits transient voltage to ≤21.2 V, preventing latch-up or gate oxide damage in 5 V tolerant transceivers while supporting AEC-Q101-compliant designs. |
Use Scenario: Safeguarding PLC digital input modules connected to 24 V DC field wiring exposed to relay coil switching and motor drive noise. IC Role / Device Role: Primary surge suppression device on backplane or terminal block interface, upstream of optocoupler or Schmitt trigger input stage. Use Value: Absorbs 1500 W surges without degradation, maintaining signal integrity and eliminating need for secondary crowbar circuits in DIN-rail mounted controllers. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Transient protection on Ethernet PHY magnetics center taps and PoE data lines subject to induced lightning surges. IC Role / Device Role: Common-mode TVS pair (used in dual configuration) across differential pairs to suppress asymmetrical surges while preserving signal balance. Use Value: Symmetric 14.3–15.8 V breakdown ensures matched clamping on both lines, reducing common-mode-to-differential conversion and maintaining EMC performance. |
Use Scenario: Secondary-side overvoltage clamp on 12 V output rail of wall-mounted AC/DC adapters for smart home devices. IC Role / Device Role: Last-line defense against output capacitor failure or regulator runaway, clamping voltage before downstream USB-PD or PMIC damage. Use Value: Fast response (<1 ns) and low clamping voltage prevent catastrophic failure of 12 V-rated USB-C controllers and battery management ICs. |
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 pulse power (600 W), same VWM (12.8 V), SMB package (smaller footprint, higher RθJA = 85 °C/W) | Suitable for lower-energy threats (IEC 61000-4-2 ESD only); not recommended for IEC 61000-4-5 line surges. | Select SMBJ15CA only when board space is constrained and surge threat level is limited to ±8 kV contact ESD. |
| SMCJ15CA | Same 1500 W rating and SMC package, but VWM = 12.8 V and VC = 21.2 V identical; differs in M3 vs. E3 suffix (halogen-free vs. standard RoHS) | Functionally interchangeable in all electrical and mechanical aspects; differs only in material composition compliance. | Choose SMCJ15CA-E3/9AT if halogen content is unrestricted; SM15T15CA-M3/9AT required where JEDEC JS709E halogen-free mandate applies. |
Compared with SMBJ15CA, SM15T15CA-M3/9AT provides 2.5× higher surge energy handling for robust industrial and automotive deployment; versus SMCJ15CA, it offers identical protection performance with certified halogen-free construction for strict environmental compliance programs.
Availability
SM15T15CA-M3/9AT is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O terminals, and telecom line interface circuits requiring stable component supply, long-term lifecycle support, and halogen-free material compliance.
Supply support for SM15T15CA-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 automotive-grade qualification.
The SM15T Series is designed specifically for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where 1500 W surge immunity and AEC-Q101 readiness are mandatory.
FAQ
What does the "CA" suffix indicate in SM15T15CA-M3/9AT?
The "CA" suffix denotes a bidirectional configuration, meaning the SM15T15CA-M3/9AT provides symmetrical transient suppression in both polarities. Unlike unidirectional variants (e.g., SM15T15A), it has no cathode marking and can be mounted without orientation concern-ideal for AC-coupled or floating signal lines where polarity reversal may occur during surge events.
Is SM15T15CA-M3/9AT AEC-Q101 qualified?
The base part number SM15T15CA-M3/9AT is commercial-grade; however, the HM3-suffixed variant (e.g., SM15T15CAHM3_A/I) is fully AEC-Q101 qualified. The SM15T15CA-M3/9AT shares identical electrical and thermal characteristics and can be upgraded to automotive qualification via ordering code revision without design change.
What is the clamping voltage of SM15T15CA-M3/9AT at its rated peak pulse current?
The SM15T15CA-M3/9AT clamps to a maximum of 21.2 V at 71 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is guaranteed across temperature and process variation, ensuring downstream ICs see no more than 21.2 V during worst-case surge conditions.
How does the M3 suffix affect the material composition of SM15T15CA-M3/9AT?
The M3 suffix certifies that SM15T15CA-M3/9AT is halogen-free and RoHS-compliant per JEDEC JS709E, with brominated flame retardants replaced by phosphorus-based alternatives. This meets stringent environmental requirements for consumer electronics and automotive supply chains without compromising UL 94 V-0 flammability rating.
Can SM15T15CA-M3/9AT replace SM15T15A in an existing design?
SM15T15CA-M3/9AT cannot directly replace unidirectional SM15T15A without circuit review: the CA version is bidirectional and lacks polarity marking, which may cause unintended conduction in DC-biased paths. Use SM15T15CA-M3/9AT only where bidirectional clamping is explicitly required-e.g., differential signaling or AC lines.
SM15T15CA-M3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- SM15T, 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):
- 71A
- 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)
SM15T15CA-M3/9AT FAQ
1.How can I place an order for SM15T15CA-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T15CA-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 SM15T15CA-M3/9AT reliable?
The price and inventory of SM15T15CA-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 SM15T15CA-M3/9AT is usually 5 days.
3.What payment methods are accepted for SM15T15CA-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T15CA-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T15CA-M3/9AT?
SM15T15CA-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T15CA-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 SM15T15CA-M3/9AT?
For technical support, including SM15T15CA-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T15CA-M3/9AT requirements.
6.How does Aetrix verify that SM15T15CA-M3/9AT is sourced from the original manufacturer or authorized distributors?
All SM15T15CA-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 SM15T15CA-M3/9AT meets industry standards.
7.What is the process for return or replacement of SM15T15CA-M3/9AT?
All SM15T15CA-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SM15T15CA-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 SM15T15CA-M3/9AT part is unused and in its original packaging.
Return procedure for SM15T15CA-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T15CA-M3/9AT Tags
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