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Vishay General Semiconductor - Diodes Division SM15T150CA-M3/9AT
- Part No.:
- SM15T150CA-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T150CA-M3/9AT.pdf
- Description:
- TVS DIODE 128VWM 207VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,514
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Product details
Overview
SM15T150CA-M3/9AT from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 150 V standoff voltage (VWM), 207 V clamping voltage at 7.2 A IPPM, and operating junction temperature up to +150 °C. It protects signal lines and power rails in automotive sensor units and industrial I/O interfaces against lightning-induced and switching transients.
For engineers reviewing the SM15T150CA-M3/9AT datasheet, SM15T150CA-M3/9AT pinout, SM15T150CA-M3/9AT application, or SM15T150CA-M3/9AT equivalent, key selection criteria include bidirectional clamping behavior, 150 V VWM compatibility with 24 V–48 V systems, low-inductance SMC package layout, and halogen-free RoHS compliance per M3 suffix.
Technical Context
This device operates as a voltage-clamped surge protector with symmetrical breakdown in both directions due to its CA (bidirectional) configuration. Its 10/1000 μs waveform rating defines transient immunity under high-impedance source conditions typical of I/O line coupling.
Clamping occurs at 207 V when subjected to 7.2 A peak pulse current, with thermal resistance RθJA = 75 °C/W and RθJL = 15 °C/W enabling reliable operation on standard 8.0 mm × 8.0 mm copper pads without forced cooling in most industrial and automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 150 V - Maximum continuous reverse working voltage before clamping initiates; matches 48 V nominal bus with 3× safety margin. |
| VBR min/max | 143 V / 158 V at 1 mA - Confirmed breakdown threshold ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 207 V at 7.2 A (10/1000 μs) - Clamping voltage limits downstream IC stress to safe levels during surge. |
| PPPM | 1500 W - Peak transient energy absorption capacity suitable for lightning-induced surges per IEC 61000-4-5 Level 3. |
| Package | SMC (DO-214AB) - Surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height for automated placement. |
| Compliance | Halogen-free, RoHS-compliant (M3 suffix), MSL Level 1, LF peak 260 °C - Supports lead-free reflow assembly without moisture sensitivity concerns. |
Pinout & Package
SM15T150CA-M3/9AT uses an SMC (DO-214AB) package with two terminals: no polarity marking for bidirectional operation. The device has symmetrical terminal roles - both ends function identically as either anode or cathode depending on transient polarity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Bidirectional terminal | Acts as anode under positive transient, cathode under negative transient; identical to Terminal 2. |
| Terminal 2 | Bidirectional terminal | Acts as cathode under positive transient, anode under negative transient; identical to Terminal 1. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables protection against severe lightning-induced transients per IEC 61000-4-5 without derating in standard PCB layouts. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes voltage overshoot across protected circuitry, preserving margin for 3.3 V/5 V logic and analog front-ends. |
| Low inductance construction | Reduces voltage overshoot during fast-rising transients (e.g., ESD or relay bounce), critical for high-speed signal line protection. |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets environmental compliance requirements for automotive and industrial end equipment without compromising surge performance. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting CAN FD and LIN bus transceivers in engine control modules from load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS placed directly at connector entry point to clamp common-mode surges before reaching transceiver inputs. Use Value: Maintains signal integrity by limiting transient voltage to ≤207 V while surviving repeated 1500 W pulses per ISO 7637-2 Pulse 5a. |
Use Scenario: Safeguarding PLC analog input channels (0–10 V, 4–20 mA) connected to field sensors exposed to motor switching noise. IC Role / Device Role / Timing Role: Primary overvoltage clamp on signal path between terminal block and ADC front-end, mounted adjacent to connector. Use Value: Prevents latch-up or damage to precision op-amps and SAR ADCs by clamping induced transients within 1 ns response time. |
| Telecom Power Rail Protection | Consumer Device USB Port |
Use Scenario: Shielding 48 V PoE-powered Ethernet switch ports from induced surges on data pairs and auxiliary power lines. IC Role / Device Role / Timing Role: Bidirectional TVS integrated into hybrid coupler interface to suppress differential-mode surges coupled onto twisted-pair lines. Use Value: Ensures IEEE 802.3af/at compliance by limiting clamped voltage below PHY IC absolute maximum ratings during surge testing. |
Use Scenario: Adding robustness to USB-C receptacles in portable speakers and docking stations against ESD and hot-plug transients. IC Role / Device Role / Timing Role: Secondary-level TVS placed after common-mode choke to absorb residual differential surges missed by upstream filtering. Use Value: Extends system-level ESD immunity beyond IEC 61000-4-2 Level 4 (±15 kV air, ±8 kV contact) without increasing board area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ150CA | Same 150 V VWM, 207 V VC, but 600 W PPPM (SMA package); lower thermal mass and higher RθJA (110 °C/W). | Lower surge capacity limits use to less severe threat environments (e.g., consumer vs. industrial). | Select when cost sensitivity outweighs need for 1500 W rating and board space allows larger pad layout for SMC. |
| ON Semiconductor 1.5SMC150CA | Identical electrical specs and SMC package; differs in MSL rating (Level 1 vs. Level 2a) and halogen content (non-halogen vs. M3 halogen-free). | Not qualified for halogen-free manufacturing lines; may require requalification for automotive AEC-Q101 programs. | Prefer SM15T150CA-M3/9AT where halogen-free compliance and MSL Level 1 are mandatory for high-reliability production. |
Compared with SMAJ150CA and 1.5SMC150CA, SM15T150CA-M3/9AT delivers full 1500 W surge handling in a halogen-free, MSL Level 1–qualified SMC package-making it optimal for automotive and industrial designs requiring long-term supply stability and strict environmental compliance.
Availability
SM15T150CA-M3/9AT is available at Aetrix Electronics and suitable for automotive sensor units, industrial PLC I/O modules, and telecom PoE power rail protection requiring stable component supply across multi-year production cycles.
Supply support for SM15T150CA-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, TVS devices, and optoelectronics with emphasis on reliability and application-specific performance.
The SM15T Series was engineered for high-energy transient suppression in harsh environments-targeting automotive, industrial, and telecom applications where failure modes must be controlled and clamping precision is critical.
FAQ
What is the clamping voltage of SM15T150CA-M3/9AT at its rated peak pulse current?
The SM15T150CA-M3/9AT clamps to 207 V when subjected to its specified peak pulse current of 7.2 A under the standard 10/1000 μs waveform. This value is measured per Figure 1 in Vishay document 88380 and defines the maximum voltage seen by downstream circuitry during a surge event. The clamping performance remains consistent across temperature and lifetime when operated within derated conditions above TA = 25 °C.
Is SM15T150CA-M3/9AT suitable for automotive applications?
Yes, SM15T150CA-M3/9AT is qualified to AEC-Q101 when ordered with HE3 or HM3 suffixes; however, the M3/9AT variant is commercial-grade and not AEC-Q101 certified. For automotive use, specify SM15T150CAHM3_X (e.g., SM15T150CAHM3_A/I) to ensure qualification. The SM15T150CA-M3/9AT itself meets all electrical and mechanical specs required for non-safety-critical automotive subsystems where AEC-Q101 is not mandated.
What does the "CA" suffix indicate in SM15T150CA-M3/9AT?
The "CA" suffix in SM15T150CA-M3/9AT explicitly denotes a bidirectional Transient Voltage Suppressor. Unlike unidirectional variants (e.g., SM15T150A), this device provides symmetrical clamping in both polarities-essential for protecting AC-coupled lines, differential buses like CAN or RS-485, and any circuit where voltage reversals may occur during transients. No polarity marking appears on the SMC body.
How does the M3 suffix affect SM15T150CA-M3/9AT's compliance profile?
The M3 suffix in SM15T150CA-M3/9AT indicates halogen-free, RoHS-compliant construction meeting JEDEC J-STD-020 MSL Level 1 and JESD 201 Class 2 whisker resistance. It replaces legacy E3 parts in environmentally regulated markets and supports lead-free reflow profiles up to 260 °C peak without moisture-related popcorning. This makes SM15T150CA-M3/9AT appropriate for medical, industrial, and green-certified consumer products.
What is the recommended PCB pad layout for SM15T150CA-M3/9AT?
Vishay specifies mounting SM15T150CA-M3/9AT on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal to achieve rated thermal and surge performance. Pad dimensions must follow DO-214AB outline: minimum 3.20 mm length, 1.52 mm width, with 2.06 mm spacing between pads. Use thermal reliefs only if necessary for soldering; oversized pads improve heat dissipation and sustain repetitive surge capability.
SM15T150CA-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):
- 128V
- Voltage - Breakdown (Min):
- 143V
- Voltage - Clamping (Max) @ Ipp:
- 207V
- Current - Peak Pulse (10/1000µs):
- 7.2A
- 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)
SM15T150CA-M3/9AT FAQ
1.How can I place an order for SM15T150CA-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T150CA-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 SM15T150CA-M3/9AT reliable?
The price and inventory of SM15T150CA-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 SM15T150CA-M3/9AT is usually 5 days.
3.What payment methods are accepted for SM15T150CA-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T150CA-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T150CA-M3/9AT?
SM15T150CA-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T150CA-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 SM15T150CA-M3/9AT?
For technical support, including SM15T150CA-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T150CA-M3/9AT requirements.
6.How does Aetrix verify that SM15T150CA-M3/9AT is sourced from the original manufacturer or authorized distributors?
All SM15T150CA-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 SM15T150CA-M3/9AT meets industry standards.
7.What is the process for return or replacement of SM15T150CA-M3/9AT?
All SM15T150CA-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SM15T150CA-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 SM15T150CA-M3/9AT part is unused and in its original packaging.
Return procedure for SM15T150CA-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T150CA-M3/9AT Tags
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