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Vishay General Semiconductor - Diodes Division SM15T27AHE3_A/H
- Part No.:
- SM15T27AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T27AHE3_A/H.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,170
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Product details
Overview
SM15T27AHE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in SMC (DO-214AB) package, with 27 V standoff voltage (VWM = 23.1 V), 37.5 V clamping voltage at 40 A peak pulse current, and 1500 W peak pulse power rating per 10/1000 μs waveform. It protects MOSFETs, ICs, and sensor signal lines in automotive and industrial power electronics against lightning-induced and switching transients.
For engineers reviewing the SM15T27AHE3_A/H datasheet, SM15T27AHE3_A/H pinout, SM15T27AHE3_A/H application, or SM15T27AHE3_A/H equivalent, key selection criteria include clamping performance at rated IPPM, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), and unidirectional polarity marking for cathode identification on PCB layout.
Technical Context
This TVS diode operates as a voltage-clamped overvoltage protection device, triggered when reverse voltage exceeds its breakdown threshold (VBR min = 25.7 V). Its glass-passivated junction ensures stable leakage (<1 μA at VWM) and low inductance for fast transient response.
Designed for high-energy threat suppression, it sustains 1500 W peak pulse power under standardized 10/1000 μs waveform with derating above 25 °C ambient, and fails short-circuit in overstress conditions-enabling predictable system-level fault containment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 23.1 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 25.7 V / 28.4 V at 1.0 mA - Confirmed breakdown range ensuring reliable turn-on margin |
| VC @ IPPM | 37.5 V at 40.0 A - Clamping voltage limiting downstream component stress during surge |
| PPPM | 1500 W - Peak pulse power handling per 10/1000 μs waveform, critical for lightning immunity |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance defining derating requirements on standard pad layout |
| TJ max | +150 °C - Maximum junction temperature enabling operation in under-hood automotive environments |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling and HTRB |
Pinout & Package
Package: SMC (DO-214AB), molded case with matte tin-plated leads, UL 94 V-0 rated compound, MSL Level 1, 260 °C reflow compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to system ground in unidirectional TVS configuration | Low-inductance path for surge current return; requires direct copper pour connection to minimize impedance |
| Cathode (banded end) | Protected line connection point; reverse-biased during clamping | Marked terminal defines polarity-must align with protected line's positive rail reference to ensure correct clamping direction |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables robust protection against IEC 61000-4-5 Level 4 surges without cascaded staging |
| Glass passivated chip junction | Ensures stable VBR tolerance and <1 μA ID at VWM across temperature and lifetime |
| AEC-Q101 qualified (HE3 suffix) | Validates suitability for automotive powertrain and body electronics with zero early-life failure risk |
| Low inductance design | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a) |
| SMC package with J-STD-002 solderability | Supports automated SMT assembly and IPC-A-610 Class 2/3 compliance without lead finish concerns |
Applications
| Automotive Power Distribution | Industrial Motor Drive I/O Protection |
|---|---|
Use Scenario: Protecting 24 V supply rails in vehicle ECUs against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC input, clamping spikes up to 120 V. Use Value: Limits voltage seen by downstream regulators to ≤37.5 V during 40 A surge, preventing latch-up or burnout. | Use Scenario: Shielding PLC analog input channels from inductive kickback of solenoid valves. IC Role / Device Role / Timing Role: Standoff protection on 0–10 V sensor interface lines, mounted adjacent to connector. Use Value: Clamps 1 kV/μs transients within 1 ns response time while maintaining <1 μA leakage at 23.1 V operating voltage. |
| Telecom Base Station DC Feeds | Consumer Appliance Control Boards |
Use Scenario: Safeguarding -48 V telecom power inputs against lightning-induced surges on outdoor cable runs. IC Role / Device Role / Timing Role: Reverse-polarity TVS on negative rail, leveraging unidirectional behavior for precise clamping asymmetry. Use Value: Withstands 1500 W pulses without degradation, meeting GR-1089-CORE Level 3 surge immunity requirements. | Use Scenario: Guarding microcontroller GPIOs driving relays in smart HVAC control units. IC Role / Device Role / Timing Role: Localized TVS at relay coil flyback node, absorbing 200 A IFSM-rated inductive energy. Use Value: Prevents ESD and switching noise coupling into logic circuits, reducing firmware reset events by >90% in field testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ27A-E3/57T | 600 W PPPM rating, SMA package, RθJA = 110 °C/W, non-AEC-Q101 | Limited to lower-energy threats (IEC 61000-4-5 Level 2); unsuitable for automotive under-hood use | Select when cost sensitivity outweighs surge margin and AEC-Q101 is not required |
| 1.5KE27A | Through-hole DO-201 package, same VWM/VBR/VC specs, 1500 W rating, no AEC-Q101 | Requires wave soldering or hand assembly; incompatible with fully SMT production lines | Choose only for legacy board redesigns where SMC footprint change is prohibited |
Compared with SMAJ27A-E3/57T and 1.5KE27A, SM15T27AHE3_A/H delivers higher surge robustness in an AEC-Q101-qualified SMT package, enabling single-device compliance with automotive EMC standards while supporting high-volume automated manufacturing.
Availability
SM15T27AHE3_A/H is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drive I/O protection, and telecom base station DC feeds requiring stable component supply, long-term lifecycle support, and traceable AEC-Q101-compliant sourcing.
Supply support for SM15T27AHE3_A/H 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 global manufacturing and testing infrastructure focused on reliability and application-specific performance.
The SM15T Series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom systems where failure modes must be safe and predictable-specifically designed to clamp reliably and fail short-circuit.
FAQ
What is the clamping voltage of SM15T27AHE3_A/H at its rated peak pulse current?
The SM15T27AHE3_A/H has a maximum clamping voltage (VC) of 37.5 V at 40.0 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured with the device mounted on 8.0 mm × 8.0 mm copper pads per terminal and defines the upper voltage limit imposed on protected circuitry during surge events. The clamping performance is guaranteed across the full operating temperature range and forms the basis for downstream component voltage rating selection in designs using SM15T27AHE3_A/H.
Is SM15T27AHE3_A/H qualified for automotive applications?
Yes, SM15T27AHE3_A/H is AEC-Q101 qualified, as confirmed by the "HE3" suffix in its ordering code and documentation in Vishay's SM15T series datasheet (Document Number: 88380, Revision: 09-Jan-2024). This qualification covers stress tests including temperature cycling, high-temperature reverse bias, and unbiased highly accelerated stress testing-validating its use in automotive powertrain, body control, and ADAS modules where reliability under thermal and electrical stress is mandatory. SM15T27AHE3_A/H meets these requirements without derating.
What does the "_A/H" suffix mean in SM15T27AHE3_A/H?
The "_A/H" suffix in SM15T27AHE3_A/H indicates packaging and reel configuration: "A" denotes the revision code (per Vishay's naming convention), and "H" specifies the preferred package code for 7-inch diameter plastic tape and reel, with a base quantity of 850 units. This matches Vishay's official ordering information table, where SM15T27AHE3_A/H is explicitly listed alongside weight (0.211 g) and delivery mode. The "HE3" portion confirms RoHS-compliant and AEC-Q101-qualified construction.
How does SM15T27AHE3_A/H differ from bidirectional variants like SM15T27CA?
SM15T27AHE3_A/H is unidirectional, with polarity marked by a cathode band and intended for DC line protection where surge polarity is known (e.g., positive rail to ground). In contrast, SM15T27CA is bidirectional, lacks polarity marking, and clamps symmetrically for AC or floating-line applications. Their VWM (23.1 V), VBR (25.7–28.4 V), and VC (37.5 V) are identical, but SM15T27AHE3_A/H supports higher IFSM (200 A) due to unidirectional conduction path optimization-making it preferable for DC power rail protection where polarity is fixed.
What is the thermal resistance of SM15T27AHE3_A/H, and how does it affect layout?
SM15T27AHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the recommended 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper pads per terminal. This value directly determines allowable power dissipation at elevated ambient temperatures: for example, at TA = 85 °C, derated PD drops to ~3.2 W. Layout must replicate the specified pad size and thermal vias to achieve this RθJA; smaller pads increase thermal impedance, risking premature thermal runaway during repetitive surge events. SM15T27AHE3_A/H's RθJL (junction-to-lead) is 15 °C/W, confirming efficient heat transfer to PCB copper.
SM15T27AHE3_A/H 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SM15T27AHE3_A/H FAQ
1.How can I place an order for SM15T27AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T27AHE3_A/H 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 SM15T27AHE3_A/H reliable?
The price and inventory of SM15T27AHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T27AHE3_A/H is usually 5 days.
3.What payment methods are accepted for SM15T27AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T27AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T27AHE3_A/H?
SM15T27AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T27AHE3_A/H 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 SM15T27AHE3_A/H?
For technical support, including SM15T27AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T27AHE3_A/H requirements.
6.How does Aetrix verify that SM15T27AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SM15T27AHE3_A/H 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 SM15T27AHE3_A/H meets industry standards.
7.What is the process for return or replacement of SM15T27AHE3_A/H?
All SM15T27AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SM15T27AHE3_A/H, 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 SM15T27AHE3_A/H part is unused and in its original packaging.
Return procedure for SM15T27AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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