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Vishay General Semiconductor - Diodes Division SM15T27CAHE3_A/H
- Part No.:
- SM15T27CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T27CAHE3_A/H.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SM15T27CAHE3_A/H from Vishay General Semiconductor is a bidirectional surface-mount 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 clamping to ≤37.5 V 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 SM15T27CAHE3_A/H datasheet, SM15T27CAHE3_A/H pinout, SM15T27CAHE3_A/H application, or SM15T27CAHE3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 1500 W surge rating, low clamping ratio (VC/VBR ≈ 1.35), and compatibility with automated SMT assembly on 8.0 mm × 8.0 mm copper pads.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with no polarity marking on the device body. Its silicon junction is glass passivated for stability, and it exhibits low dynamic impedance during transient events due to optimized chip geometry and low-inductance SMC package layout.
The device is thermally rated for continuous operation up to +150 °C junction temperature and derates linearly above 25 °C ambient, with RθJA = 75 °C/W and RθJL = 15 °C/W. It meets J-STD-020 MSL Level 1 and passes JESD201 Class 2 whisker testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 23.1 V - maximum reverse stand-off voltage before significant leakage; defines safe operating margin below clamping threshold |
| VBR (min/max) | 25.7 V / 28.4 V at 1.0 mA - ensures reliable turn-on within tight tolerance band for consistent transient response |
| VC @ IPPM | 37.5 V at 40.0 A (10/1000 μs) - clamping voltage limits downstream IC stress during worst-case surge |
| PPPM | 1500 W - sustains high-energy transients typical of automotive load-dump or lightning-coupled surges |
| TJ max | +150 °C - enables use in under-hood automotive environments without thermal derating penalties |
| Package | SMC (DO-214AB) - industry-standard 2-pin surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
Pinout & Package
SM15T27CAHE3_A/H uses the standard SMC (DO-214AB) package: a 2-terminal, non-polarized, bidirectional TVS diode with no cathode/anode marking. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Provides symmetrical conduction path for positive and negative transients; no fixed polarity reference |
| Cathode | Transient return path (bidirectional) | Electrically identical to Anode; device functions identically regardless of orientation in PCB layout |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV) surges when properly mounted on 8 mm × 8 mm copper pads |
| Glass passivated junction | Ensures long-term parameter stability and resistance to humidity-induced degradation |
| Low clamping ratio (VC/VBR) | ~1.35 - minimizes overvoltage stress on protected ICs while maintaining fast response time |
| MSL Level 1 | Allows unlimited floor life and reflow at 260 °C peak without baking, simplifying manufacturing flow |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting analog output lines of engine coolant temperature (ECT) and manifold absolute pressure (MAP) sensors from load-dump and alternator ripple transients. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between sensor signal line and ground, absorbing energy before it reaches the ADC input of the microcontroller. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V sensor interface ICs by limiting transient voltage to ≤37.5 V at 40 A. | Use Scenario: Safeguarding CAN_H/CAN_L differential pair in industrial PLC modules exposed to motor drive noise and relay switching spikes. IC Role / Device Role / Timing Role: Paired TVS configuration (one per line) referenced to ground, suppressing common-mode surges while preserving signal integrity. Use Value: Maintains CAN FD bit-rate compliance (up to 5 Mbps) by minimizing parasitic capacitance (typ. <50 pF) and avoiding signal distortion. |
| Telecom Power Input Stage | Consumer USB-C ESD/Transient Protection |
Use Scenario: Secondary-side transient suppression on 12 V DC input rails of VoIP gateways and fiber ONTs subjected to induced lightning surges. IC Role / Device Role / Timing Role: Standoff-clamp TVS placed after primary DC/DC converter, acting as final barrier before PMIC and SoC power inputs. Use Value: Limits voltage overshoot to <40 V during 10/1000 μs surges, preventing overvoltage shutdown or brownout in buck regulator feedback networks. | Use Scenario: Board-level protection for USB-C CC and VBUS lines in portable monitors and docking stations handling hot-plug and cable discharge events. IC Role / Device Role / Timing Role: Bidirectional clamp across VBUS-to-GND and CC-to-GND, meeting IEC 61000-4-2 Level 4 (±15 kV air/±8 kV contact) requirements. Use Value: Achieves sub-38 V clamping at 40 A while maintaining RoHS-compliant, halogen-free construction required for consumer certification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24CA | Lower peak power (400 W), higher VC/VBR ratio (~1.5), SMA package (smaller thermal mass) | Suitable only for lower-energy threats (IEC 61000-4-2 ESD, not 4-5 surges); limited to commercial temp range | Select when cost sensitivity outweighs surge robustness and automotive qualification is not required |
| 1.5KE27CA | Higher VWM (23.1 V same), but through-hole DO-201 package; 1500 W rating with slower thermal response | Requires manual or wave-solder assembly; unsuitable for high-density SMT layouts or automated production | Choose only for legacy board redesigns where SMC footprint change is prohibited |
Compared with SMAJ24CA and 1.5KE27CA, SM15T27CAHE3_A/H delivers superior surge immunity in automotive and industrial SMT designs due to its AEC-Q101 qualification, optimized SMC thermal path, and tighter VBR tolerance - enabling smaller system-level margins and higher reliability in harsh environments.
Availability
SM15T27CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, telecom power input stages, and consumer USB-C port protection requiring stable component supply and long-term lifecycle support.
Supply support for SM15T27CAHE3_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, MOSFETs, and protection devices with emphasis on high-reliability, high-power, and automotive-qualified components.
The SM15T Series was developed specifically for AEC-Q101-compliant transient suppression in automotive powertrain and body electronics, offering 1500 W surge capability in compact SMC packaging for space-constrained ECUs and ADAS modules.
FAQ
What does the "CA" suffix indicate in SM15T27CAHE3_A/H?
The "CA" suffix in SM15T27CAHE3_A/H denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SM15T27A), SM15T27CAHE3_A/H has no polarity marking and functions identically regardless of orientation on the PCB, making it ideal for AC-coupled or floating signal lines such as CAN bus or audio interfaces.
Is SM15T27CAHE3_A/H qualified for automotive applications?
Yes, SM15T27CAHE3_A/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3", which designates RoHS-compliant and AEC-Q101-qualified versions. This qualification covers stress tests including temperature cycling, high-temperature reverse bias, and ESD robustness - validating its suitability for under-hood and chassis-mounted automotive electronics where reliability under thermal and electrical stress is critical.
What is the clamping voltage of SM15T27CAHE3_A/H at rated peak pulse current?
The clamping voltage (VC) of SM15T27CAHE3_A/H is 37.5 V at 40.0 A peak pulse current with a 10/1000 μs waveform, as specified in Vishay's datasheet Document Number 88380. This value represents the maximum voltage seen across the device during worst-case surge conditions and is critical for ensuring protected downstream ICs remain within their absolute maximum ratings.
How does the SMC package of SM15T27CAHE3_A/H affect thermal performance?
The SMC (DO-214AB) package of SM15T27CAHE3_A/H provides a thermal resistance of RθJA = 75 °C/W (typical) when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. Its low-profile construction and direct lead-to-pad thermal path enable efficient heat dissipation during repetitive surge events, supporting continuous operation up to +150 °C junction temperature without external heatsinking.
Can SM15T27CAHE3_A/H replace SM15T27A in an existing design?
No - SM15T27CAHE3_A/H cannot directly replace unidirectional SM15T27A without circuit review. While both share identical VWM, VBR, and PPPM, the CA version is bidirectional and lacks polarity marking, whereas SM15T27A requires correct cathode orientation. Substitution may cause improper clamping in DC-biased circuits; redesign verification is required to confirm functionality and stress margins.
SM15T27CAHE3_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 (SMCJ)
SM15T27CAHE3_A/H FAQ
1.How can I place an order for SM15T27CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T27CAHE3_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 SM15T27CAHE3_A/H reliable?
The price and inventory of SM15T27CAHE3_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 SM15T27CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SM15T27CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T27CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T27CAHE3_A/H?
SM15T27CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T27CAHE3_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 SM15T27CAHE3_A/H?
For technical support, including SM15T27CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T27CAHE3_A/H requirements.
6.How does Aetrix verify that SM15T27CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SM15T27CAHE3_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 SM15T27CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SM15T27CAHE3_A/H?
All SM15T27CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SM15T27CAHE3_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 SM15T27CAHE3_A/H part is unused and in its original packaging.
Return procedure for SM15T27CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T27CAHE3_A/H Tags
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