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Vishay General Semiconductor - Diodes Division SM15T27AHM3/H
- Part No.:
- SM15T27AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T27AHM3/H.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,752
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Product details
Overview
SM15T27AHM3/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 23.1 V stand-off voltage (VWM), 25.7–28.4 V breakdown voltage (VBR), and 37.5 V maximum clamping voltage (VC) at 40.0 A IPPM. It protects MOSFETs, ICs, and sensor signal lines in automotive powertrain control modules against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T27AHM3/H datasheet, SM15T27AHM3/H pinout, SM15T27AHM3/H application, or SM15T27AHM3/H equivalent, key selection criteria include verified clamping performance at 40 A, AEC-Q101 qualification (HM3 suffix), halogen-free RoHS compliance, and thermal resistance (RθJA = 75 °C/W) under standard pad layout.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, designed to shunt transient energy above 23.1 V while maintaining low leakage (<1.0 μA at VWM). Its glass-passivated junction ensures stable breakdown and low inductance for fast response to sub-microsecond threats.
The device sustains 200 A non-repetitive forward surge current (10 ms half-sine) and operates across –65 °C to +150 °C junction temperature. Its SMC package meets J-STD-020 MSL Level 1 and UL 94 V-0 flammability requirements, supporting automated placement in high-reliability automotive PCB assemblies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 23.1 V - Maximum continuous reverse operating voltage before clamping begins; sets system-level overvoltage trip threshold. |
| VBR (min/max) | 25.7 V / 28.4 V - Verified breakdown range at 1.0 mA test current; ensures consistent turn-on across production lots. |
| VC @ IPPM | 37.5 V at 40.0 A - Clamped voltage during 10/1000 μs transient; defines worst-case stress on protected downstream ICs. |
| PPPM | 1500 W - Peak pulse power handling per 10/1000 μs waveform; qualifies for ISO 7637-2 Pulse 1/2/5a automotive surge immunity. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments without derating. |
| RθJA | 75 °C/W - Thermal resistance junction-to-ambient on 8.0 mm × 8.0 mm copper pads; informs board-level thermal design margin. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, AEC-Q101 qualified (HM3 suffix). Cathode identified by molded band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current return path | Connected to ground or low-impedance reference; completes clamping loop during overvoltage events. |
| Cathode | Transient current input node | Connected to protected line (e.g., 24 V supply rail or sensor output); conducts when VAK exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Validated clamping capability against severe automotive load-dump and inductive kick transients per ISO 16750-2. |
| AEC-Q101 qualified (HM3 suffix) | Qualified for automotive powertrain and chassis applications requiring zero-defect reliability and extended temperature operation. |
| Glass passivated chip junction | Ensures stable VBR tolerance and low parameter drift over lifetime and temperature cycling. |
| Low inductance SMC package | Minimizes voltage overshoot during fast-rising transients (e.g., <100 ns edges), improving protection fidelity. |
Applications
| Automotive Power Supply Protection | Industrial Motor Drive I/O Protection |
|---|---|
Use Scenario: Protecting 24 V battery-fed ECUs from load-dump transients up to 35 V and ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery rail and DC-DC input stage. Use Value: Limits voltage seen by upstream regulator to ≤37.5 V at 40 A, preventing latch-up or permanent damage. |
Use Scenario: Shielding analog sensor inputs (e.g., current sense, position feedback) from switching noise in VFDs. IC Role / Device Role / Timing Role: Point-of-entry protection on isolated signal lines interfacing with microcontrollers. Use Value: Sub-100 ns response time clamps EFT bursts to <40 V, preserving ADC accuracy and signal integrity. |
| Automotive Sensor Signal Line Protection | Telecom DC Power Interface Protection |
Use Scenario: Safeguarding LIN/CAN transceiver I/O pins against ESD and cable discharge events in body control modules. IC Role / Device Role / Timing Role: Secondary protection layer downstream of primary ESD diodes, handling higher-energy surges. Use Value: Withstands 200 A surge (10 ms half-sine), enabling robustness against accidental short-to-battery faults. |
Use Scenario: Guarding -48 V telecom power feeds against lightning-induced surges entering central office equipment. IC Role / Device Role / Timing Role: Primary overvoltage clamp on DC input bus prior to hot-swap controller and backup battery switch. Use Value: 1500 W rating supports IEC 61000-4-5 Level 4 (4 kV/2 Ω) compliance with minimal footprint. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A-E3/57T | Lower PPPM (400 W), higher VC (38.9 V at 10.3 A), SMA package (smaller thermal mass). | Rated for lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a or load-dump scenarios. | Select only for cost-sensitive consumer applications with limited surge exposure and space-constrained layouts. |
| SMCJ24A-M3/57T | Same SMC package, identical VWM/VBR/VC, but commercial-grade (non-AEC-Q101), halogen-free RoHS. | Lacks automotive qualification; not approved for safety-critical vehicle subsystems. | Use where AEC-Q101 is not mandated, e.g., industrial control panels or telecom infrastructure with internal surge suppression. |
Compared with SM15T27AHM3/H, SMAJ24A-E3/57T offers reduced surge capacity and no automotive qualification, while SMCJ24A-M3/57T matches electrical specs but omits AEC-Q101 validation-making SM15T27AHM3/H the sole choice for production automotive systems requiring both performance and qualification.
Availability
SM15T27AHM3/H is available at Aetrix Electronics and suitable for automotive powertrain control units, industrial motor drive I/O interfaces, and telecom DC power entry points requiring stable component supply, long-term lifecycle support, and traceable AEC-Q101 qualified parts.
Supply support for SM15T27AHM3/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 facilities focused on reliability and automotive-grade quality.
The SM15T Series targets high-energy transient suppression in harsh environments; it was engineered specifically for automotive, industrial, and telecom applications demanding 1500 W surge handling and AEC-Q101 compliance in compact SMC packaging.
FAQ
What is the clamping voltage of SM15T27AHM3/H at its rated peak pulse current?
The SM15T27AHM3/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 JEDEC standards and defines the upper voltage limit imposed on protected circuitry during surge events.
Is SM15T27AHM3/H qualified for automotive use?
Yes, SM15T27AHM3/H is AEC-Q101 qualified, as confirmed by the "HM3" suffix indicating halogen-free, RoHS-compliant, and automotive-grade qualification. It is approved for use in engine control units, transmission control modules, and other safety-relevant automotive subsystems requiring zero-defect reliability and operation from –65 °C to +150 °C.
What does the "HM3" suffix mean in SM15T27AHM3/H?
The "HM3" suffix in SM15T27AHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from commercial-grade versions (e.g., "M3") and confirms compliance with automotive reliability standards, including temperature cycling, humidity testing, and mechanical shock requirements defined in AEC-Q101.
How does SM15T27AHM3/H differ from bidirectional TVS diodes like SM15T27CA?
SM15T27AHM3/H is unidirectional and features a cathode band marking; it conducts only during reverse-biased overvoltage events. In contrast, SM15T27CA is bidirectional with no polarity marking and clamps transients of either polarity-making SM15T27AHM3/H appropriate for DC rails with defined ground reference, while SM15T27CA suits AC-coupled or floating signal lines.
What is the thermal resistance of SM15T27AHM3/H, and how does it affect PCB layout?
The SM15T27AHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper pads per terminal. To maintain safe junction temperatures under sustained surge duty, designers must allocate adequate copper area and avoid thermal isolation-reducing pad size increases RθJA and risks thermal runaway during repeated transients.
SM15T27AHM3/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:
- 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/H FAQ
1.How can I place an order for SM15T27AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T27AHM3/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 SM15T27AHM3/H reliable?
The price and inventory of SM15T27AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T27AHM3/H is usually 5 days.
3.What payment methods are accepted for SM15T27AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T27AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T27AHM3/H?
SM15T27AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T27AHM3/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 SM15T27AHM3/H?
For technical support, including SM15T27AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T27AHM3/H requirements.
6.How does Aetrix verify that SM15T27AHM3/H is sourced from the original manufacturer or authorized distributors?
All SM15T27AHM3/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 SM15T27AHM3/H meets industry standards.
7.What is the process for return or replacement of SM15T27AHM3/H?
All SM15T27AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SM15T27AHM3/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 SM15T27AHM3/H part is unused and in its original packaging.
Return procedure for SM15T27AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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