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Vishay General Semiconductor - Diodes Division SM15T27A-E3/9AT
- Part No.:
- SM15T27A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T27A-E3/9AT.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,448
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Product details
Overview
SM15T27A-E3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 1500 W peak pulse power (10/1000 μs), 27 V standoff voltage (VWM = 23.1 V), and clamping voltage of 37.5 V at 40 A. It protects MOSFETs, ICs, and sensor signal lines in automotive and industrial power supplies.
For engineers reviewing the SM15T27A-E3/9AT datasheet, SM15T27A-E3/9AT pinout, SM15T27A-E3/9AT application, or SM15T27A-E3/9AT equivalent, key selection criteria include unidirectional polarity, 23.1 V reverse standoff, 37.5 V clamping at 40 A, thermal resistance (RθJA = 75 °C/W), and AEC-Q101 qualification eligibility via HE3 suffix variants.
Technical Context
This TVS diode operates as a clamping device in parallel with sensitive circuitry, responding to transients within nanoseconds by entering avalanche breakdown when reverse voltage exceeds VBR (25.7–28.4 V). Its low-inductance SMC package and glass-passivated junction ensure fast response and stable performance under repeated surges.
Designed for high-impedance source environments-such as I/O lines, sensor interfaces, and DC power rails-it limits peak current to 40 A (10/1000 μs) while maintaining clamping below 37.5 V. Failure mode is short-circuit, aligning with system-level fault containment requirements in automotive and industrial designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 23.1 V - Maximum continuous reverse operating voltage before leakage exceeds 1 μA; sets upper limit for normal circuit operation. |
| VBR @ IT = 1 mA | 25.7–28.4 V - Breakdown voltage range defining reliable avalanche initiation threshold under standardized test conditions. |
| VC @ IPPM = 40 A | 37.5 V - Clamped voltage during 10/1000 μs surge; determines maximum stress imposed on protected downstream components. |
| PPPM | 1500 W - Peak pulse power handling capability; defines energy absorption capacity for lightning or switching transients. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on standard 8 mm × 8 mm copper pads; informs derating above 25 °C ambient. |
| TJ max. | +150 °C - Maximum allowable junction temperature; constrains continuous power dissipation (PD = 6.5 W) and surge repetition rate. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile, RoHS-compliant matte tin-plated leads. Molding compound meets UL 94 V-0. Polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-biased avalanche terminal | Connected to protected line; conducts during overvoltage to clamp voltage at VC. |
| Anode | Reference/ground return path | Typically tied to system ground or low-impedance return; completes clamping current path during transient events. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables robust protection against IEC 61000-4-5 Level 4 (4 kV) surges without derating on standard PCB layouts. |
| Glass-passivated chip junction | Ensures stable VBR and low leakage (<1 μA at VWM) across temperature and lifetime, critical for automotive sensor interfaces. |
| Low inductance SMC package | Minimizes voltage overshoot during fast-rising transients (e.g., ESD or inductive kick), improving clamping fidelity. |
| MSL Level 1, 260 °C reflow compatible | Supports lead-free assembly without moisture sensitivity concerns or pre-bake requirements. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 24 V CAN bus power inputs and LIN transceivers from load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and regulator input to clamp surges up to ±35 V. Use Value: Limits clamped voltage to 37.5 V at 40 A, preventing damage to downstream LDOs and communication ICs rated for ≤40 V absolute maximum. | Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to PLC analog input modules. IC Role / Device Role / Timing Role: Parallel-connected clamping device on 0–10 V or 4–20 mA signal lines exposed to field wiring transients. Use Value: Maintains signal integrity by suppressing >1 kV transients to <37.5 V within <1 ns, avoiding ADC saturation or op-amp latch-up. |
| Consumer Power Adapter Input Stage | Telecom DC Feeder Protection |
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters powering USB-C PD controllers or PMICs. IC Role / Device Role / Timing Role: Standoff-rated TVS across +VOUT and GND to absorb flyback spikes from transformer leakage inductance. Use Value: Withstands repetitive 1500 W pulses without degradation, enabling compliance with UL 62368-1 surge immunity requirements. | Use Scenario: Protecting -48 V DC feeder lines in base station remote radio units from induced lightning surges. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to negative rail, absorbing positive-going transients on the supply line. Use Value: Delivers 40 A peak current handling at 37.5 V clamping, meeting GR-1089-CORE Level 3 (2 kV/10 Ω) telecom surge standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ28A | Lower peak power (400 W), same SMC package, VWM = 28 V, VC = 45.4 V @ 8.8 A | Not suitable for IEC 61000-4-5 Level 4; limited to lower-energy threats like ESD or local switching noise. | Select SMAJ28A only when surge threat level is ≤1 kV and board space constraints prohibit larger packages. |
| SMCJ28A | Same 1500 W rating and SMC package, but VWM = 28 V, VC = 43.5 V @ 34.5 A; higher clamping voltage than SM15T27A-E3/9AT. | Acceptable where 43.5 V clamping is tolerable (e.g., 36 V-rated regulators), but less effective for 24 V systems with tight margin. | Choose SMCJ28A if VWM alignment with 28 V nominal rails is prioritized over lowest possible clamping voltage. |
Compared with SMAJ28A and SMCJ28A, SM15T27A-E3/9AT offers superior clamping (37.5 V vs. ≥43.5 V) at full 1500 W rating, making it optimal for 24 V systems requiring minimal voltage overshoot during high-energy transients.
Availability
SM15T27A-E3/9AT is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom DC feeder surge suppression requiring stable component supply and traceable sourcing.
Supply support for SM15T27A-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 is a global leader in discrete semiconductors, specializing in diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability and AEC-Q101 qualification.
The SM15T Series is engineered for high-energy transient suppression in harsh environments-targeting automotive, industrial, and telecom applications where 1500 W surge handling and stable clamping under temperature variation are critical.
FAQ
What is the standoff voltage rating of the SM15T27A-E3/9AT?
The SM15T27A-E3/9AT has a reverse standoff voltage (VWM) of 23.1 V, meaning it remains non-conductive with leakage <1 μA up to this voltage. This value is derived from the 27 V designation and confirmed in the Vishay datasheet Table "ELECTRICAL CHARACTERISTICS" for SM15T27A. It ensures compatibility with 24 V nominal systems while providing margin against ripple and tolerance drift.
Does the SM15T27A-E3/9AT meet AEC-Q101 requirements?
The SM15T27A-E3/9AT itself is commercial-grade (E3 suffix), not AEC-Q101 qualified. However, Vishay offers AEC-Q101 variants under ordering codes SM15T27AHE3_A/I or SM15T27AHM3_A/I. The SM15T27A-E3/9AT shares identical electrical and thermal characteristics with those qualified versions-only the qualification testing and traceability differ.
What is the clamping voltage of the SM15T27A-E3/9AT at its rated peak pulse current?
The SM15T27A-E3/9AT clamps to 37.5 V at its peak pulse current of 40 A under the standard 10/1000 μs waveform. This value is specified in the "ELECTRICAL CHARACTERISTICS" table and defines the maximum voltage seen by protected circuitry during worst-case surge events, directly impacting downstream component stress margins.
Can the SM15T27A-E3/9AT be used in bidirectional configurations?
No-the SM15T27A-E3/9AT is unidirectional only, as indicated by the "A" suffix and cathode band marking. For bidirectional operation, Vishay specifies the CA-suffixed variant (e.g., SM15T27CA). Using SM15T27A-E3/9AT in reverse-biased AC applications would result in forward conduction and failure.
What is the thermal resistance of the SM15T27A-E3/9AT, and how does it affect layout?
The SM15T27A-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. This value assumes minimum recommended pad layout per the Vishay datasheet; reducing pad area increases RθJA, requiring stricter derating of PPPM at elevated ambient temperatures.
SM15T27A-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:
- 1
- Bidirectional Channels:
- -
- 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)
SM15T27A-E3/9AT FAQ
1.How can I place an order for SM15T27A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T27A-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 SM15T27A-E3/9AT reliable?
The price and inventory of SM15T27A-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 SM15T27A-E3/9AT is usually 5 days.
3.What payment methods are accepted for SM15T27A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T27A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T27A-E3/9AT?
SM15T27A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T27A-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 SM15T27A-E3/9AT?
For technical support, including SM15T27A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T27A-E3/9AT requirements.
6.How does Aetrix verify that SM15T27A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SM15T27A-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 SM15T27A-E3/9AT meets industry standards.
7.What is the process for return or replacement of SM15T27A-E3/9AT?
All SM15T27A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SM15T27A-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 SM15T27A-E3/9AT part is unused and in its original packaging.
Return procedure for SM15T27A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T27A-E3/9AT Tags
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