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Vishay General Semiconductor - Diodes Division SM15T27CAHM3/I
- Part No.:
- SM15T27CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T27CAHM3/I.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,646
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Product details
Overview
SM15T27CAHM3/I 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), 23.1 V stand-off voltage (VWM), 25.7–28.4 V breakdown voltage (VBR), and 37.5 V clamping voltage (VC) at 40.0 A peak pulse current - used to protect automotive sensor signal lines against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T27CAHM3/I datasheet, SM15T27CAHM3/I pinout, SM15T27CAHM3/I application, or SM15T27CAHM3/I equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, SMC package thermal data, and real-world protection use cases for industrial and automotive electronics design.
Technical Context
This bidirectional TVS operates symmetrically across both polarities with identical VBR, VWM, and VC specifications in forward and reverse directions. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and robust surge handling up to 200 A IFSM (unidirectional only; not applicable here).
Designed for high-impedance source environments, it clamps transients within its specified 37.5 V limit at 40.0 A IPPM (10/1000 μs), with thermal resistance RθJA = 75 °C/W and RθJL = 15 °C/W - enabling reliable operation up to +150 °C junction temperature without external heatsinking under typical PCB pad layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 23.1 V - maximum continuous reverse operating voltage before clamping begins; sets safe margin below system supply rails. |
| VBR (min/max) | 25.7 V / 28.4 V at 1.0 mA test current - defines precise voltage threshold where avalanche conduction initiates reliably. |
| VC @ IPPM | 37.5 V at 40.0 A (10/1000 μs) - peak clamped voltage seen by protected IC; determines maximum stress on downstream circuitry. |
| PPPM | 1500 W - peak transient energy absorption capability; sufficient for IEC 61000-4-5 Level 4 (4 kV) surge protection. |
| TJ max | +150 °C - maximum junction temperature; supports under-hood automotive deployment with standard thermal pad layout. |
| Package | SMC (DO-214AB) - surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with automated pick-and-place. |
| AEC-Q101 | Qualified - certified for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
SMC (DO-214AB) package: molded plastic body with two coplanar matte tin-plated leads; no polarity marking for bidirectional devices; terminals solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (either polarity) | Acts as cathode during positive half-cycle; enables symmetrical clamping behavior in AC or bidirectional signal paths. |
| Cathode | Transient current exit point (either polarity) | Acts as anode during negative half-cycle; eliminates need for orientation-aware placement in PCB layout. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of differential or AC-coupled lines (e.g., CAN, LIN, sensor bridges) without polarity constraints. |
| 1500 W peak pulse rating | Meets IEC 61000-4-5 surge immunity requirements for industrial and automotive applications with minimal layout overhead. |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes overvoltage exposure to protected ICs - critical for 24 V automotive microcontrollers and analog front-ends. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive use including temperature cycling, humidity bias, and mechanical shock - supports PPAP documentation. |
| Halogen-free & RoHS-compliant | Complies with EU Directive 2011/65/EU and IPC-1752A material declarations; suitable for global OEM supply chains. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 24 V CAN FD transceivers and Hall-effect position sensors from load-dump and inductive kickback in engine control units. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector interface to shunt transients before reaching signal conditioning circuitry. Use Value: Limits transient voltage to ≤37.5 V during 40 A surges, preventing latch-up or gate oxide damage in 3.3 V/5 V microcontrollers and analog ASICs. |
Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers exposed to relay coil switching noise and field wiring surges. IC Role / Device Role / Timing Role: Primary overvoltage suppression element mounted adjacent to terminal block to absorb fast-rising transients before optocoupler inputs. Use Value: Withstands repeated 10/1000 μs surges up to 1500 W without degradation, extending module service life in factory automation environments. |
| Telecom Power Interface | Consumer Appliance Motor Control |
Use Scenario: Shielding PoE-powered Ethernet switches from induced surges on DC power feed lines during lightning events. IC Role / Device Role / Timing Role: Secondary-level TVS on 48 V DC input rail, coordinated with upstream GDT or MOV for staged surge attenuation. Use Value: Fast response (<1 ns) and low clamping voltage preserve integrity of DC-DC converters and PHY ICs during multi-kV line-to-ground transients. |
Use Scenario: Protecting microcontroller GPIOs and gate drivers in smart washing machine motor inverters from brush-commutation spikes. IC Role / Device Role / Timing Role: Localized transient suppression at motor driver IC supply pins and feedback signal nodes. Use Value: Halogen-free construction meets IEC 62368-1 flammability requirements while maintaining 1500 W surge capacity in compact SMC package. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24CA | Lower PPPM (400 W), higher VC (38.9 V at 10.3 A), SMA package (smaller footprint, lower thermal mass) | Not suitable for IEC 61000-4-5 Level 4; limited to low-energy consumer interfaces | Select when space-constrained layouts prioritize size over surge margin; verify derating for ambient >70 °C. |
| SMCJ24CA | Same SMC package, identical VWM/VBR/VC, but rated for 1500 W with tighter VBR tolerance (5% vs. SM15T's 10%) and non-AEC-Q101 commercial grade (M3/E3) | Lacks automotive qualification; unsuitable for Tier-1 vehicle programs requiring PPAP | Choose for cost-sensitive industrial designs where AEC-Q101 is not mandated and tighter VBR consistency is required. |
Compared with SMAJ24CA and SMCJ24CA, SM15T27CAHM3/I provides AEC-Q101 qualification, halogen-free compliance, and guaranteed 1500 W surge handling in the same SMC footprint - making it the preferred choice for automotive and high-reliability industrial deployments where certification and long-term supply continuity are mandatory.
Availability
SM15T27CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, telecom power interfaces, and consumer appliance motor controllers requiring stable component supply with full traceability and lifecycle management.
Supply support for SM15T27CAHM3/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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SM15T Series was developed specifically for high-power transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where robustness against lightning, ESD, and inductive switching is non-negotiable.
FAQ
What is the clamping voltage of SM15T27CAHM3/I at its rated peak pulse current?
The SM15T27CAHM3/I has a maximum clamping voltage (VC) of 37.5 V at 40.0 A peak pulse current with a 10/1000 μs waveform. This value is measured under standardized test conditions per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during surge events. The SM15T27CAHM3/I maintains this clamping performance across its full operating temperature range (-65 °C to +150 °C).
Is SM15T27CAHM3/I qualified for automotive applications?
Yes, SM15T27CAHM3/I is AEC-Q101 qualified, as indicated by the "HM3" suffix in its part number. This qualification covers stress tests including temperature cycling, high-temperature reverse bias, and mechanical shock - confirming suitability for under-hood and chassis-mounted automotive electronics. The device also meets JESD201 Class 2 whisker resistance and UL 94 V-0 flammability requirements.
What does the "CA" suffix mean in SM15T27CAHM3/I?
The "CA" suffix in SM15T27CAHM3/I denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SM15T27A), the CA version has no polarity marking and functions identically regardless of voltage polarity applied across its terminals, simplifying layout for AC or differential signal protection.
What is the thermal resistance of SM15T27CAHM3/I from junction to ambient?
The SM15T27CAHM3/I 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 assumes still air conditions and is critical for calculating maximum allowable power dissipation at elevated ambient temperatures. For sustained operation above 70 °C ambient, derating per Figure 2 in the datasheet is required.
How does SM15T27CAHM3/I differ from SM15T27A in practical design?
SM15T27CAHM3/I is bidirectional and AEC-Q101 qualified with halogen-free construction, whereas SM15T27A is unidirectional, commercial-grade (E3/M3), and lacks automotive qualification. In circuit design, SM15T27CAHM3/I eliminates orientation concerns and supports dual-polarity transients (e.g., CAN bus), while SM15T27A requires correct cathode alignment and is limited to DC-biased protection paths. Both share identical VWM, VBR, and VC values.
SM15T27CAHM3/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:
- -
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SM15T27CAHM3/I FAQ
1.How can I place an order for SM15T27CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T27CAHM3/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 SM15T27CAHM3/I reliable?
The price and inventory of SM15T27CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T27CAHM3/I is usually 5 days.
3.What payment methods are accepted for SM15T27CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T27CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T27CAHM3/I?
SM15T27CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T27CAHM3/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 SM15T27CAHM3/I?
For technical support, including SM15T27CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T27CAHM3/I requirements.
6.How does Aetrix verify that SM15T27CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SM15T27CAHM3/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 SM15T27CAHM3/I meets industry standards.
7.What is the process for return or replacement of SM15T27CAHM3/I?
All SM15T27CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM15T27CAHM3/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 SM15T27CAHM3/I part is unused and in its original packaging.
Return procedure for SM15T27CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T27CAHM3/I Tags
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