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Vishay General Semiconductor - Diodes Division SM15T27CA-E3/9AT
- Part No.:
- SM15T27CA-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T27CA-E3/9AT.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,703
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Product details
Overview
SM15T27CA-E3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode 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 peak pulse current. 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-E3/9AT datasheet, SM15T27CA-E3/9AT pinout, SM15T27CA-E3/9AT application, or SM15T27CA-E3/9AT equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, thermal resistance (RθJA = 75 °C/W), AEC-Q101 qualification status, and RoHS-compliant packaging details per Vishay Document #88380 (Rev. 09-Jan-2024).
Technical Context
This bidirectional TVS operates symmetrically across both polarities with breakdown voltage (VBR) of 25.7–28.4 V at 1 mA test current and clamps to ≤48.3 V under 207 A (10/1000 μs). Its low-inductance SMC package and glass-passivated junction enable fast response (<1 ns) to ESD and surge events while maintaining stable leakage (<1 μA at 23.1 V).
Thermal design relies on RθJL = 15 °C/W to leads and RθJA = 75 °C/W to ambient (on 8.0 mm × 8.0 mm copper pads); it sustains continuous power dissipation of 6.5 W at 50 °C ambient and operates from –65 °C to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 23.1 V - Maximum reverse stand-off voltage before clamping begins; defines safe operating window for 24 V nominal systems. |
| VBR (min/max) | 25.7 V / 28.4 V at 1 mA - Confirmed bidirectional breakdown threshold; ensures symmetrical protection in AC-coupled or floating lines. |
| VC @ IPPM | 48.3 V at 207 A (10/1000 μs) - Clamping voltage limits downstream IC stress during lightning surges per IEC 61000-4-5 Level 4. |
| PPPM | 1500 W - Peak pulse power rating supports high-energy transients from inductive load switching or telecom line surges. |
| RθJA | 75 °C/W - Thermal resistance requires ≥8 mm × 8 mm copper pad per terminal for reliable 6.5 W continuous operation at 50 °C ambient. |
| TJ max | +150 °C - Enables use in under-hood automotive environments and industrial enclosures without derating below 125 °C ambient. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional device with no polarity marking; matte tin-plated leads, MSL Level 1, 260 °C reflow peak.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative half-cycle) | Accepts reverse surge current during negative voltage excursions; identical clamping behavior as cathode due to bidirectional symmetry. |
| Cathode | Transient current entry (positive half-cycle) | Accepts forward surge current during positive voltage excursions; functionally interchangeable with anode in CA-suffix devices. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Supports IEC 61000-4-5 4th-level surge immunity testing on 24 V power rails and CAN/LIN bus lines. |
| Glass-passivated chip junction | Ensures stable VBR and low leakage (<1 μA) over temperature and lifetime, critical for battery-backed sensor nodes. |
| Low inductance SMC package | Minimizes voltage overshoot during <1 ns ESD events (IEC 61000-4-2 ±15 kV contact), preserving signal integrity on high-speed lines. |
| AEC-Q101 qualified option available | HE3/HM3 variants meet automotive reliability requirements; SM15T27CA-E3/9AT is commercial-grade but shares identical die and package. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines (0–10 V, 4–20 mA) and digital inputs in engine control modules from load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector interface to shunt transients before reaching precision ADCs or microcontrollers. Use Value: Clamps 207 A surges to ≤48.3 V, preventing latch-up or gate oxide damage in 3.3 V/5 V interface ICs while maintaining <1 μA leakage at 23.1 V. |
Use Scenario: Safeguarding RS-485 transceivers and relay driver outputs in factory automation controllers exposed to motor switching noise. IC Role / Device Role / Timing Role: Primary surge suppression device on field-side terminals, coordinated with upstream GDTs for multi-stage protection. Use Value: 1500 W rating handles repetitive 10/1000 μs transients from 3-phase motor drives; SMC footprint enables automated placement adjacent to connectors. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Shielding Ethernet PHY magnetics and PoE injectors from induced surges on outdoor cabling per IEC 61000-4-5. IC Role / Device Role / Timing Role: Secondary protection stage after gas discharge tube, limiting let-through voltage to PHY ICs during combined mode surges. Use Value: Symmetrical 25.7–28.4 V VBR ensures balanced clamping on differential pairs; 75 °C/W RθJA allows thermal management without heatsinks. |
Use Scenario: Input-stage transient suppression on 24 V DC input rails of smart home hubs and security cameras. IC Role / Device Role / Timing Role: First-line defense against plug-in surges and nearby lightning coupling into wall adapters. Use Value: 48.3 V clamping prevents overvoltage on primary-side controller ICs; RoHS-compliant E3 suffix meets global regulatory requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ28CA | Lower PPPM (400 W), higher VC (45.4 V @ 8.3 A), SMA package (smaller thermal mass) | Not suitable for IEC 61000-4-5 Level 4; limited to low-energy consumer interfaces | Select SMAJ28CA only for space-constrained, low-threat environments where 207 A surge handling is unnecessary. |
| SMCJ28CA | Same SMC package, identical VWM/VBR, but 1500 W rating with tighter VC tolerance (45.7 V @ 210 A) | Direct functional replacement with marginally better clamping; same PCB layout and thermal design | SMCJ28CA offers improved consistency for high-reliability industrial designs but requires verification of manufacturer-specific AEC-Q101 availability. |
Compared with SMAJ28CA and SMCJ28CA, SM15T27CA-E3/9AT provides identical 1500 W surge capability and SMC thermal performance as SMCJ28CA but uses Vishay's optimized TRANSZORB® junction for lower leakage and tighter VBR distribution-critical for precision analog front-ends.
Availability
SM15T27CA-E3/9AT is available at Aetrix Electronics and suitable for automotive sensor units, industrial PLC I/O modules, and telecom line interfaces requiring stable component supply, RoHS compliance, and 1500 W transient immunity.
Supply support for SM15T27CA-E3/9AT 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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on reliability, power handling, and automotive qualification.
The SM15T Series targets high-energy transient suppression in harsh environments; its 1500 W rating, AEC-Q101 option, and SMC package reflect design focus on automotive, industrial, and telecom infrastructure protection.
FAQ
What is the clamping voltage of SM15T27CA-E3/9AT at its rated peak pulse current?
The SM15T27CA-E3/9AT clamps to a maximum of 48.3 V when subjected to its rated peak pulse current of 207 A using the standard 10/1000 μs waveform. This value is measured per Figure 1 in Vishay Document #88380 and defines the upper voltage limit imposed on protected circuitry during surge events.
Is SM15T27CA-E3/9AT suitable for automotive applications?
SM15T27CA-E3/9AT is RoHS-compliant and built on the same die and SMC package as AEC-Q101-qualified variants (e.g., SM15T27CAHE3_A/I), but the E3/9AT suffix denotes commercial grade. For production automotive use, specify HE3 or HM3 suffixes; SM15T27CA-E3/9AT remains valid for prototyping and non-safety-critical subsystems.
How does the bidirectional configuration of SM15T27CA-E3/9AT affect its circuit placement?
As a bidirectional TVS, SM15T27CA-E3/9AT has no polarity marking and connects across differential lines or AC-coupled signals without regard to orientation. It provides symmetrical clamping for both positive and negative transients, making it ideal for RS-485, CAN, and Ethernet PHY protection where voltage swings occur in both directions.
What is the thermal resistance of SM15T27CA-E3/9AT, and how does it impact PCB layout?
SM15T27CA-E3/9AT 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. To maintain safe junction temperatures under 6.5 W continuous dissipation, designers must allocate sufficient copper area and avoid excessive trace length between pads and thermal planes.
Does SM15T27CA-E3/9AT meet any international surge immunity standards?
SM15T27CA-E3/9AT supports compliance with IEC 61000-4-5 (surge immunity) Level 4 (4 kV line-to-earth, 2 kV line-to-line) when used in properly designed multi-stage protection circuits. Its 1500 W rating and 48.3 V clamping voltage are key enablers for meeting these requirements in 24 V systems.
SM15T27CA-E3/9AT 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-E3/9AT FAQ
1.How can I place an order for SM15T27CA-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T27CA-E3/9AT 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-E3/9AT reliable?
The price and inventory of SM15T27CA-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T27CA-E3/9AT is usually 5 days.
3.What payment methods are accepted for SM15T27CA-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T27CA-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T27CA-E3/9AT?
SM15T27CA-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T27CA-E3/9AT 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-E3/9AT?
For technical support, including SM15T27CA-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T27CA-E3/9AT requirements.
6.How does Aetrix verify that SM15T27CA-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SM15T27CA-E3/9AT 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-E3/9AT meets industry standards.
7.What is the process for return or replacement of SM15T27CA-E3/9AT?
All SM15T27CA-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SM15T27CA-E3/9AT, 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-E3/9AT part is unused and in its original packaging.
Return procedure for SM15T27CA-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T27CA-E3/9AT Tags
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