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Vishay General Semiconductor - Diodes Division SM15T27CA-M3/9AT
- Part No.:
- SM15T27CA-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T27CA-M3/9AT.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,348
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Product details
Overview
SM15T27CA-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), 27 V standoff voltage (VWM), and clamping voltage of 48.3 V at 207 A IPPM. 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 SM15T27CA-M3/9AT datasheet, SM15T27CA-M3/9AT pinout, SM15T27CA-M3/9AT application, or SM15T27CA-M3/9AT equivalent, key selection criteria include bidirectional clamping behavior, 27 V VWM tolerance, 48.3 V VC at 207 A, halogen-free RoHS compliance (M3 suffix), and AEC-Q101 qualification readiness via HM3 variant.
Technical Context
This device operates as a voltage-clamped surge protector with symmetrical breakdown in both polarities due to its bidirectional CA construction. Its 10/1000 μs waveform rating defines standardized transient immunity, and clamping occurs within nanoseconds after overvoltage onset.
Thermal performance is governed by RθJA = 75 °C/W and RθJL = 15 °C/W, requiring minimum 8.0 mm × 8.0 mm copper pads per terminal for full 1500 W rating. The glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and low inductance for fast response.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 27 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 25.7 V / 28.4 V - Breakdown voltage range at 1 mA test current, defining conduction threshold |
| VC @ IPPM | 48.3 V at 207 A - Clamped voltage during 10/1000 μs surge, limiting downstream stress |
| PPPM | 1500 W - Peak pulse power handling capability under standardized surge waveform |
| ID @ VWM | <1.0 μA - Reverse leakage current at 27 V, ensuring minimal standby power loss |
| Package | SMC (DO-214AB) - Surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height |
| TJ max | +150 °C - Maximum junction temperature enabling operation in under-hood automotive environments |
Pinout & Package
SM15T27CA-M3/9AT uses a 2-terminal SMC (DO-214AB) package with no polarity marking-bidirectional symmetry means both terminals are functionally identical. Mounting requires symmetric 8.0 mm × 8.0 mm copper pads per lead per Vishay's thermal derating guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path | Either terminal conducts surge current bidirectionally; no cathode band marking |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables robust protection against lightning surges and inductive switching spikes without derating in standard PCB layouts |
| Low clamping ratio (VC/VBR ≈ 1.7) | Minimizes voltage overshoot across protected ICs, preserving margin for 3.3 V or 5 V logic interfaces |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets IPC-1752A material declaration requirements and EU environmental compliance mandates |
| MSL Level 1, 260 °C reflow compatible | Supports single-pass lead-free assembly without moisture sensitivity concerns or baking preconditioning |
| AEC-Q101 qualification pathway | HM3 variant available for automotive applications requiring stress-tested reliability per JESD22-A108 |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ESD events in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector interface to shunt transients before reaching signal conditioning circuitry. Use Value: Maintains 27 V VWM compatibility with 24 V automotive systems while clamping to 48.3 V-well below typical 60 V IC absolute maximum ratings. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to relay coil flyback and motor drive noise on factory floor wiring. IC Role / Device Role / Timing Role: Primary surge suppression element on 24 V DC input channels, coordinated with upstream fusing and filtering. Use Value: 1500 W rating handles repetitive 200 A switching transients; low leakage (<1 μA) avoids false triggering in high-impedance sensing circuits. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Shielding Ethernet PHYs and PoE injectors from induced surges on outdoor cabling in telecom access equipment. IC Role / Device Role / Timing Role: Secondary-level TVS on secondary-side DC lines, complementing primary MOV-based AC protection. Use Value: Fast sub-nanosecond response and 48.3 V clamping prevent latch-up in 3.3 V/5 V PHYs during 10/1000 μs line surges. |
Use Scenario: Overvoltage protection on the DC output rail of wall-mounted USB-C PD adapters subject to unregulated input transients. IC Role / Device Role / Timing Role: Final-stage clamping device downstream of DC-DC regulation, guarding connected devices from output overvoltage faults. Use Value: 27 V VWM aligns with 20–28 V adapter outputs; halogen-free M3 construction supports global consumer safety certifications (UL/EN 62368). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ27CA | Lower PPPM (600 W), same VWM (27 V), SMB package (smaller footprint, higher RθJA) | Limited to lower-energy threats; unsuitable for lightning-level surges in outdoor telecom or industrial settings | Select when space-constrained layouts prioritize size over 1500 W surge margin |
| SMCJ27CA | Same PPPM (1500 W), identical VWM/VC specs, but E3 suffix (non-halogen-free RoHS) | Acceptable where halogen-free requirement is not mandated (e.g., non-EU commercial products) | Choose for cost-sensitive volume production where M3 environmental compliance is not required |
Compared with SMBJ27CA and SMCJ27CA, SM15T27CA-M3/9AT uniquely combines 1500 W surge capacity, halogen-free compliance, and SMC package thermal performance-making it optimal for automotive-qualified and environmentally regulated industrial designs requiring full lightning immunity.
Availability
SM15T27CA-M3/9AT is available at Aetrix Electronics and suitable for automotive sensor units, industrial PLC I/O modules, and telecom line interfaces requiring stable component supply, long-term lifecycle support, and halogen-free compliance.
Supply support for SM15T27CA-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 MOSFETs with emphasis on reliability, power efficiency, and application-specific ruggedization.
The SM15T Series was engineered for high-energy transient suppression in harsh environments-including automotive, industrial automation, and telecom infrastructure-where 1500 W surge handling and AEC-Q101 readiness are critical design requirements.
FAQ
What does the "CA" suffix indicate in SM15T27CA-M3/9AT?
The "CA" suffix denotes a bidirectional configuration, meaning SM15T27CA-M3/9AT provides symmetrical clamping for both positive and negative transients without polarity dependence. This differs from unidirectional "A" variants, which require correct anode/cathode orientation and only clamp in one direction. The CA version is ideal for AC-coupled or differential signal lines where voltage polarity reverses.
Is SM15T27CA-M3/9AT suitable for automotive applications?
SM15T27CA-M3/9AT itself is commercial-grade (M3 suffix), but Vishay offers the HM3 variant (e.g., SM15T27CAHM3_A/I) that is fully AEC-Q101 qualified. For production automotive use, the HM3 version must be specified; SM15T27CA-M3/9AT may be used in prototyping or non-safety-critical subsystems pending qualification validation.
What is the maximum clamping voltage of SM15T27CA-M3/9AT and at what current?
The maximum clamping voltage (VC) of SM15T27CA-M3/9AT is 48.3 V, measured at a peak pulse current (IPPM) of 207 A using the standardized 10/1000 μs waveform. This value is guaranteed per Vishay's datasheet (Document Number: 88380, Rev. 09-Jan-2024) and defines the upper voltage limit imposed on protected circuitry during surge events.
How does the M3 suffix affect compliance and assembly of SM15T27CA-M3/9AT?
The M3 suffix indicates SM15T27CA-M3/9AT is halogen-free and RoHS-compliant per EU Directive 2011/65/EU, with brominated flame retardants replaced by alternative chemistries. It also meets JESD201 Class 2 whisker resistance and is rated MSL Level 1-allowing direct placement into lead-free reflow ovens at 260 °C without pre-baking.
What PCB layout guidance applies to SM15T27CA-M3/9AT for full 1500 W rating?
To achieve the full 1500 W peak pulse power rating, SM15T27CA-M3/9AT must be mounted on minimum 8.0 mm × 8.0 mm copper pads per terminal, as specified in Vishay's datasheet Figure 2. Smaller pads cause thermal derating; insufficient copper area raises junction temperature beyond safe limits during surge events, reducing effective clamping performance and lifetime reliability.
SM15T27CA-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):
- 23.1V
- Voltage - Breakdown (Min):
- 25.7V
- Voltage - Clamping (Max) @ Ipp:
- 37.5V
- Current - Peak Pulse (10/1000µs):
- 40A
- 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)
SM15T27CA-M3/9AT FAQ
1.How can I place an order for SM15T27CA-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T27CA-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 SM15T27CA-M3/9AT reliable?
The price and inventory of SM15T27CA-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 SM15T27CA-M3/9AT is usually 5 days.
3.What payment methods are accepted for SM15T27CA-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T27CA-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T27CA-M3/9AT?
SM15T27CA-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T27CA-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 SM15T27CA-M3/9AT?
For technical support, including SM15T27CA-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T27CA-M3/9AT requirements.
6.How does Aetrix verify that SM15T27CA-M3/9AT is sourced from the original manufacturer or authorized distributors?
All SM15T27CA-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 SM15T27CA-M3/9AT meets industry standards.
7.What is the process for return or replacement of SM15T27CA-M3/9AT?
All SM15T27CA-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SM15T27CA-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 SM15T27CA-M3/9AT part is unused and in its original packaging.
Return procedure for SM15T27CA-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T27CA-M3/9AT Tags
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