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Vishay General Semiconductor - Diodes Division SM15T27AHM3/I
- Part No.:
- SM15T27AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T27AHM3/I.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,087
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Product details
Overview
SM15T27AHM3/I from Vishay General Semiconductor is a unidirectional 1500 W 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 AEC-Q101 qualification for automotive use. It protects MOSFETs, sensor signal lines, and I/O interfaces against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T27AHM3/I datasheet, SM15T27AHM3/I pinout, SM15T27AHM3/I application, or SM15T27AHM3/I equivalent, key selection criteria include clamping performance under 10/1000 μs surge, unidirectional polarity with cathode band marking, halogen-free RoHS compliance, and automotive-grade reliability per AEC-Q101.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds 23.1 V (VWM), it remains high-impedance until breakdown at 25.7–28.4 V (VBR), then clamps to ≤37.5 V at 40 A IPPM. Its low-inductance SMC package enables fast response to transients with minimal overshoot.
Designed for high-energy threat suppression, the SM15T27AHM3/I sustains 1500 W peak pulse power (10/1000 μs), dissipates 6.5 W continuously, and withstands 200 A non-repetitive forward surge (10 ms half-sine). Junction temperature range is –65 °C to +150 °C, with thermal resistance RθJA = 75 °C/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 23.1 V - Maximum continuous reverse operating voltage before leakage exceeds 1 μA; defines safe signal line bias margin. |
| VBR min/max | 25.7 V / 28.4 V at 1 mA - Confirmed breakdown threshold ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 37.5 V at 40 A (10/1000 μs) - Clamping voltage limits downstream IC stress during standardized surge testing. |
| PPPM | 1500 W - Peak pulse power rating determines survivability against lightning and inductive switching transients. |
| IFSM | 200 A - Non-repetitive forward surge current rating supports robustness during accidental forward faults. |
| TJ max | +150 °C - Maximum junction temperature enables operation in under-hood automotive environments. |
| Package | SMC (DO-214AB) - Surface-mount package with 7.75 mm × 6.22 mm footprint, optimized for automated placement and thermal pad layout. |
Pinout & Package
SM15T27AHM3/I uses the standard SMC (DO-214AB) package: molded plastic case with matte tin-plated leads, polarity indicated by a cathode band on the unidirectional device. Mounting requires 8.0 mm × 8.0 mm copper pads per terminal per JEDEC recommendations.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to system ground or low-impedance return; forms shunt path during reverse overvoltage. |
| Cathode | Reverse-biased terminal / protected line connection | Connected to protected signal or power line; clamping occurs between cathode and anode when VREV > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables protection against IEC 61000-4-5 Level 4 (4 kV) surges without derating in typical PCB layouts. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive powertrain and body electronics applications requiring zero-defect reliability and extended temperature operation. |
| Halogen-free, RoHS-compliant | Meets EU Directive 2011/65/EU and IPC-1752A material declarations for green manufacturing and end-of-life processing. |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes voltage overshoot during transient events, reducing risk of latch-up or gate oxide damage in protected MOSFETs. |
| MSL Level 1 (260 °C peak) | Supports lead-free reflow soldering without moisture sensitivity concerns or pre-bake requirements. |
Applications
| Automotive Sensor Protection | Industrial Motor Drive I/O |
|---|---|
Use Scenario: Protecting analog output lines of engine coolant temperature (ECT) sensors exposed to load-dump and alternator ripple in 12 V systems. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between sensor output and ground, clamping transients before they reach ADC input of ECU. Use Value: Maintains signal integrity below 37.5 V clamp during 40 A surges, preventing ADC saturation and enabling fault-free cold-cranking operation. |
Use Scenario: Shielding encoder feedback lines in servo drives from commutation noise and inductive kickback from H-bridge switching. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS (cathode grounded) suppressing both positive and negative transients on differential A/B channels. Use Value: Limits transient amplitude to <38 V while preserving signal edge fidelity up to 1 MHz due to low junction capacitance (<100 pF). |
| Telecom Power Interface | Consumer USB-C Port Protection |
Use Scenario: Guarding 48 V DC power inputs of PoE-powered network switches against lightning-induced surges on Ethernet cables. IC Role / Device Role / Timing Role: Primary-level TVS on DC input rail, coordinated with upstream GDT and downstream polymer PTC for staged protection. Use Value: Absorbs 1500 W surge energy without failure, maintaining short-circuit fail-safe mode to prevent fire hazard during overstress. |
Use Scenario: Safeguarding VBUS and CC lines in USB-C receptacles against ESD and hot-plug transients in portable speakers and docking stations. IC Role / Device Role / Timing Role: Secondary-level TVS after common-mode choke, placed adjacent to connector to minimize trace inductance. Use Value: Achieves <30 ns response time and clamps 8 kV contact ESD to <40 V, meeting IEC 61000-4-2 Level 4 immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ28A-E3/57T | Lower PPPM (400 W), same VWM (28 V), SMA package (smaller thermal mass) | Not AEC-Q101 qualified; unsuitable for automotive under-hood use | Select for cost-sensitive consumer applications where 400 W surge margin suffices and space is constrained. |
| 1.5KE27CA | Through-hole DO-201 package, bidirectional, higher VBR tolerance (±5%), 1500 W rating | Lacks AEC-Q101 qualification and halogen-free compliance; incompatible with SMT assembly | Choose for legacy industrial designs using through-hole assembly and requiring bidirectional clamping symmetry. |
Compared with SMAJ28A-E3/57T and 1.5KE27CA, SM15T27AHM3/I uniquely combines automotive qualification, halogen-free construction, and SMC-package thermal performance-enabling reliable 1500 W surge handling in space-constrained, high-reliability surface-mount systems.
Availability
SM15T27AHM3/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial motor drive I/O protection, and telecom power interface designs requiring stable component supply, long-term lifecycle support, and AEC-Q101 compliance.
Supply support for SM15T27AHM3/I 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, efficiency, and application-specific performance.
The SM15T Series was developed to deliver high-power transient suppression in compact SMC packages for automotive, industrial, and telecom systems where AEC-Q101 qualification and halogen-free compliance are mandatory.
FAQ
What is the clamping voltage of SM15T27AHM3/I at its rated peak pulse current?
The SM15T27AHM3/I has a maximum clamping voltage (VC) of 37.5 V when subjected to a 10/1000 μs waveform at 40 A peak pulse current (IPPM). This value is measured per Figure 1 in Vishay document 88380 and defines the upper voltage limit imposed on protected circuitry during standardized surge events.
Is SM15T27AHM3/I suitable for automotive applications?
Yes, SM15T27AHM3/I is AEC-Q101 qualified (indicated by the HM3 suffix) and rated for operating junction temperatures from –65 °C to +150 °C. It is specifically designed for automotive powertrain, body control, and sensor interface applications requiring certified reliability and halogen-free materials.
How does the HM3 suffix differ from the M3 suffix in SM15T27AHM3/I?
The HM3 suffix denotes halogen-free, RoHS-compliant construction *and* AEC-Q101 qualification, whereas M3 indicates halogen-free and RoHS compliance only. SM15T27AHM3/I meets automotive stress test requirements including temperature cycling, humidity bias, and mechanical shock-beyond commercial-grade M3 variants.
What is the thermal resistance of SM15T27AHM3/I, and how does it affect PCB layout?
SM15T27AHM3/I 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 TJ ≤ 150 °C at full 6.5 W continuous dissipation, designers must provide adequate copper area and avoid thermal bottlenecks in the ground plane.
Does SM15T27AHM3/I have polarity marking, and how is it oriented on the PCB?
Yes, SM15T27AHM3/I is unidirectional and features a visible cathode band on the SMC package body. During PCB layout, the banded end must connect to the line being protected (e.g., VCC or signal), while the opposite end connects to ground-reversal would cause forward conduction and potential failure.
SM15T27AHM3/I 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:
- Discontinued at Digi-Key
- 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 (SMC)
SM15T27AHM3/I FAQ
1.How can I place an order for SM15T27AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T27AHM3/I 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 SM15T27AHM3/I reliable?
The price and inventory of SM15T27AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T27AHM3/I is usually 5 days.
3.What payment methods are accepted for SM15T27AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T27AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T27AHM3/I?
SM15T27AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T27AHM3/I 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 SM15T27AHM3/I?
For technical support, including SM15T27AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T27AHM3/I requirements.
6.How does Aetrix verify that SM15T27AHM3/I is sourced from the original manufacturer or authorized distributors?
All SM15T27AHM3/I 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 SM15T27AHM3/I meets industry standards.
7.What is the process for return or replacement of SM15T27AHM3/I?
All SM15T27AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM15T27AHM3/I, 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 SM15T27AHM3/I part is unused and in its original packaging.
Return procedure for SM15T27AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T27AHM3/I Tags
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