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Vishay General Semiconductor - Diodes Division SM15T27CAHM3_A/H
- Part No.:
- SM15T27CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T27CAHM3_A/H.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,206
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Product details
Overview
SM15T27CAHM3_A/H from Vishay General Semiconductor is a bidirectional 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 clamps to ≤37.5 V at 40.0 A peak pulse current - used to protect automotive sensor signal lines, I/O ports, and MOSFET gate drivers against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T27CAHM3_A/H datasheet, SM15T27CAHM3_A/H pinout, SM15T27CAHM3_A/H application, or SM15T27CAHM3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low clamping ratio (VC/VBR ≈ 1.35), halogen-free RoHS compliance, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This bidirectional TVS diode operates symmetrically in both polarities, delivering consistent clamping performance without polarity dependence. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1.0 μA at VWM) across -65 °C to +150 °C operating range.
The device uses a low-inductance SMC package optimized for fast transient response, with thermal resistance RθJA = 75 °C/W and RθJL = 15 °C/W, enabling reliable operation under repetitive surge conditions when mounted per recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 23.1 V - maximum continuous reverse working voltage before clamping initiates; defines safe operating margin for 24 V automotive systems. |
| VBR (min/max) | 25.7 V / 28.4 V at 1.0 mA - precise bidirectional breakdown threshold ensuring predictable turn-on during overvoltage events. |
| VC @ IPPM | 37.5 V at 40.0 A (10/1000 μs) - clamping voltage limits downstream IC stress to <38 V during 1500 W transient surges. |
| PPPM | 1500 W - peak pulse power rating confirms suitability for lightning surge protection per IEC 61000-4-5 Level 3/4. |
| TJ max | +150 °C - junction temperature limit supports under-hood automotive deployment with no derating up to 125 °C ambient. |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height for high-power density PCB layout. |
Pinout & Package
SM15T27CAHM3_A/H is housed in an SMC (DO-214AB) package with two terminals: anode and cathode. As a bidirectional device, it has no polarity marking; both terminals are functionally identical and interchangeable in circuit placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (positive half-cycle) | Conducts surge current toward cathode during positive transients; symmetrical with cathode for bidirectional operation. |
| Cathode | Transient current entry point (negative half-cycle) | Conducts surge current toward anode during negative transients; electrically identical to anode in CA-suffix devices. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - required for engine control, ADAS, and body electronics. |
| Halogen-free & RoHS-compliant | Meets JEDEC J-STD-020 MSL level 1 (260 °C peak reflow) and JESD201 class 2 whisker resistance - supports lead-free manufacturing and environmental compliance. |
| Low clamping ratio | VC/VBR ≈ 1.35 - minimizes voltage overshoot during clamping, reducing risk of latch-up or damage to protected 24 V logic interfaces. |
| High IPPM capability | 40.0 A peak pulse current (10/1000 μs) - enables robust protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 2 Ω/42 Ω coupling network surges. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) in vehicle ECUs from load-dump and inductive kickback. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector interface to shunt transients before reaching signal conditioning ICs. Use Value: Maintains signal integrity by limiting transient excursions to ≤37.5 V while surviving >1000 surges per AEC-Q101 stress profile. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers against field-wiring induced surges from solenoid valves and motor starters. IC Role / Device Role / Timing Role: Primary overvoltage suppression element on 24 V DC input channels, coordinated with series impedance and filtering. Use Value: Enables compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) immunity requirements without external crowbar circuits. |
| Telecom Power Interface | Consumer Appliance Motor Control |
|
Use Scenario: Shielding PoE-powered Ethernet PHYs and DC-DC converters from induced transients on 48 V power rails in telecom infrastructure equipment. IC Role / Device Role / Timing Role: Fast-response transient suppressor placed upstream of primary DC-DC regulator to prevent overvoltage shutdown. Use Value: Clamps 1500 W surges within 1 ns, preserving uptime and avoiding brownout resets during lightning-related grid disturbances. |
Use Scenario: Securing microcontroller GPIOs and gate drivers in washing machine motor inverters exposed to brush-commutator noise and relay switching spikes. IC Role / Device Role / Timing Role: Secondary-level protection between MCU and half-bridge driver ICs, complementing primary bulk capacitance. Use Value: Extends system lifetime by preventing cumulative gate oxide degradation caused by sub-100 ns voltage spikes exceeding 30 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24CA | Lower PPPM (400 W), higher VC/VBR ratio (1.43), SMA package (smaller thermal mass) | Limited to lower-energy threats (IEC 61000-4-2 ESD only); unsuitable for ISO 7637-2 Pulse 5a or lightning surges | Select when cost sensitivity outweighs surge energy requirements and board space is constrained. |
| 1.5KE27CA | Higher VWM (23.1 V same), but axial DO-201 package - incompatible with SMT automation and higher inductance | Requires through-hole assembly; not AEC-Q101 qualified; lacks halogen-free certification | Choose only for legacy through-hole designs where rework to SMT is impractical and automotive qualification is not required. |
Compared with SMAJ24CA and 1.5KE27CA, SM15T27CAHM3_A/H delivers 3.75× higher surge power handling, AEC-Q101 validation for automotive use, and SMT-ready halogen-free construction - making it the optimal choice for new 24 V system designs requiring IEC/ISO-compliant transient immunity.
Availability
SM15T27CAHM3_A/H is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC I/O modules, and telecom power interface protection requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for SM15T27CAHM3_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 is a global leader in discrete semiconductors, specializing in diodes, rectifiers, and protection devices with emphasis on reliability, power handling, and automotive qualification.
The SM15T Series was engineered specifically for high-energy transient suppression in 12 V/24 V automotive and industrial systems, combining AEC-Q101 compliance, halogen-free materials, and 1500 W surge capability in compact SMC packaging.
FAQ
What does the "CA" suffix indicate in SM15T27CAHM3_A/H?
The "CA" suffix denotes a bidirectional configuration, meaning SM15T27CAHM3_A/H provides symmetrical clamping in both voltage polarities - unlike unidirectional "A" variants that conduct only in reverse bias. This makes SM15T27CAHM3_A/H ideal for AC-coupled lines, differential buses like CAN, and any application where polarity reversal is possible during transients.
Is SM15T27CAHM3_A/H qualified for automotive applications?
Yes, SM15T27CAHM3_A/H carries the HM3 suffix, confirming it is halogen-free, RoHS-compliant, and AEC-Q101 qualified. It has passed stress tests including temperature cycling, high-temperature reverse bias, and ESD per AEC-Q101 Rev D - making SM15T27CAHM3_A/H suitable for engine control units, ADAS sensors, and body electronics.
What is the maximum clamping voltage of SM15T27CAHM3_A/H under surge conditions?
SM15T27CAHM3_A/H clamps to a maximum of 37.5 V at 40.0 A peak pulse current with a 10/1000 μs waveform. This value is guaranteed across temperature and lifetime, and reflects the actual voltage seen by protected circuitry during worst-case surge events - critical for ensuring downstream 3.3 V or 5 V logic remains within safe operating limits.
How does the SMC package of SM15T27CAHM3_A/H compare to SMA or SMB in surge handling?
The SMC (DO-214AB) package of SM15T27CAHM3_A/H offers 2.5× higher thermal mass than SMA and 1.7× higher than SMB, directly enabling its 1500 W PPPM rating. Its larger copper pad area (8.0 mm × 8.0 mm per terminal) lowers thermal resistance (RθJA = 75 °C/W), allowing SM15T27CAHM3_A/H to sustain repeated surges without junction overheating - a key advantage over smaller-outline alternatives.
Can SM15T27CAHM3_A/H replace SM15T24CA in a 24 V system?
SM15T27CAHM3_A/H has a higher VWM (23.1 V vs. 20.5 V) and VBR (25.7–28.4 V vs. 22.8–25.2 V) than SM15T24CA, offering improved margin against normal 24 V rail variation and reduced leakage at operating voltage. However, its slightly higher clamping voltage (37.5 V vs. 33.2 V) must be verified against protected IC absolute maximum ratings before substitution in existing designs.
SM15T27CAHM3_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:
- -
- 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_A/H FAQ
1.How can I place an order for SM15T27CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T27CAHM3_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 SM15T27CAHM3_A/H reliable?
The price and inventory of SM15T27CAHM3_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 SM15T27CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SM15T27CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T27CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T27CAHM3_A/H?
SM15T27CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T27CAHM3_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 SM15T27CAHM3_A/H?
For technical support, including SM15T27CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T27CAHM3_A/H requirements.
6.How does Aetrix verify that SM15T27CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SM15T27CAHM3_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 SM15T27CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SM15T27CAHM3_A/H?
All SM15T27CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SM15T27CAHM3_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 SM15T27CAHM3_A/H part is unused and in its original packaging.
Return procedure for SM15T27CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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