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Vishay General Semiconductor - Diodes Division SM15T27CAHE3_A/I
- Part No.:
- SM15T27CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T27CAHE3_A/I.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,395
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Product details
Overview
SM15T27CAHE3_A/I from Vishay General Semiconductor is a bidirectional 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 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 SM15T27CAHE3_A/I datasheet, SM15T27CAHE3_A/I pinout, SM15T27CAHE3_A/I application, or SM15T27CAHE3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low clamping ratio (VC/VBR ≈ 1.39), thermal resistance (RθJA = 75 °C/W), and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SM15T27CAHE3_A/I operates as a bidirectional avalanche diode, leveraging glass-passivated junction technology to deliver symmetrical clamping in both polarities. Its 10/1000 μs waveform response ensures robust protection against lightning surges and switching transients from inductive loads.
Designed for high-reliability automotive applications, it features AEC-Q101 qualification, MSL Level 1 moisture sensitivity, and matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. Failure mode under overstress is short-circuit, supporting fail-safe system design.
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 test current - guaranteed avalanche onset range for bidirectional conduction |
| VC @ IPPM | 37.5 V at 40.0 A (10/1000 μs) - clamping voltage limiting downstream IC stress during surge events |
| PPPM | 1500 W - peak pulse power handling capacity per industry-standard waveform, enabling lightning-level protection |
| TJ max. | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| RθJA | 75 °C/W - thermal resistance from junction to ambient, requiring minimum 8.0 mm × 8.0 mm copper pad for derating compliance |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads; meets UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (marked end) | Reference terminal for unidirectional devices; not marked on bidirectional types like SM15T27CAHE3_A/I | No polarity marking - symmetrical bidirectional conduction means either terminal serves as anode or cathode depending on transient polarity |
| Anode (unmarked end) | Complementary terminal in bidirectional configuration | Terminal pair forms a voltage-clamped path across protected line and ground, independent of signal polarity |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional 1500 W TVS | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term leakage performance under thermal stress |
| Low-inductance SMC package | Minimizes voltage overshoot during fast-rising transients (e.g., ESD or inductive kickback) |
| MSL Level 1, 260 °C reflow compatible | Supports standard lead-free PCB assembly without preconditioning or special handling |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver I/O pins in engine control units exposed to load-dump and jump-start transients. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and chassis ground. Use Value: Limits transient voltage to ≤37.5 V, preventing damage to 5 V or 3.3 V transceivers while maintaining signal integrity during normal operation. |
Use Scenario: Safeguarding differential CAN_H/CAN_L lines in factory automation gateways subject to motor drive noise. IC Role / Device Role / Timing Role: Common-mode transient suppressor across bus pair, referenced to local ground. Use Value: Clamps common-mode surges up to 1500 W without disrupting 1 Mbps CAN signaling due to low capacitance and symmetrical response. |
| Telecom Power Input Stage | Consumer Appliance Motor Control |
Use Scenario: Input-stage protection on 24 V DC telecom power supplies subjected to lightning-induced surges on PoE or auxiliary lines. IC Role / Device Role / Timing Role: Primary overvoltage clamp upstream of DC-DC converter input. Use Value: Absorbs 10/1000 μs surges up to 40 A while maintaining <1 μA leakage at 23.1 V, minimizing standby power loss. |
Use Scenario: Suppressing inductive kickback from brushed DC motors in smart home appliances (e.g., washing machine drum drives). IC Role / Device Role / Timing Role: Across motor terminals or between H-bridge outputs and ground. Use Value: Prevents MOSFET avalanche failure by clamping flyback spikes to 37.5 V, extending power stage lifetime under repeated switching. |
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 (1.52), SMA package (smaller thermal mass) | Limited to lower-energy threats; unsuitable for lightning-level protection per IEC 61000-4-5 | Select when space-constrained layouts prioritize footprint over surge margin |
| 1.5KE27CA | Higher VWM (23.1 V same), but axial DO-201 package - incompatible with automated SMT assembly | Requires manual or wave-soldering; no AEC-Q101 qualification | Choose only for legacy through-hole designs where rework cost outweighs performance trade-offs |
Compared with SMAJ24CA and 1.5KE27CA, the SM15T27CAHE3_A/I delivers 3.75× higher surge power handling in an AEC-Q101-qualified SMT package, enabling automotive-grade reliability without layout redesign or process change.
Availability
SM15T27CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial CAN bus interface, and telecom power input stage applications requiring stable component supply, AEC-Q101 compliance, and 1500 W transient immunity.
Supply support for SM15T27CAHE3_A/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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SM15T Series was engineered specifically for high-energy transient suppression in automotive and industrial environments, combining AEC-Q101 qualification, low-clamp performance, and SMT manufacturability in the SMC package.
FAQ
What does the "CA" suffix indicate in SM15T27CAHE3_A/I?
The "CA" suffix denotes a bidirectional configuration - meaning the SM15T27CAHE3_A/I provides symmetrical clamping in both forward and reverse directions, unlike unidirectional "A" variants. This enables protection of AC-coupled or floating signal paths without polarity concerns, and eliminates the need for orientation-aware placement during SMT assembly.
Is SM15T27CAHE3_A/I qualified for automotive use?
Yes, SM15T27CAHE3_A/I is AEC-Q101 qualified, as confirmed by its "HE3" suffix and documentation in Vishay's 88380 datasheet. It undergoes rigorous stress testing including temperature cycling, high-temperature operating life, and mechanical shock - making it suitable for under-hood and body-control module applications where reliability is critical.
What is the clamping voltage of SM15T27CAHE3_A/I at its rated peak pulse current?
The SM15T27CAHE3_A/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 per Figure 1 and Table on page 2 of the Vishay 88380 datasheet and defines the upper voltage limit imposed on protected circuitry during surge events.
Does SM15T27CAHE3_A/I require a heatsink for standard operation?
No external heatsink is required for SM15T27CAHE3_A/I under typical transient conditions, as its 6.5 W steady-state power dissipation (PD) is managed via PCB copper pads. The datasheet specifies mounting on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal to achieve the rated RθJA of 75 °C/W and prevent thermal runaway during repetitive surges.
How does the SM15T27CAHE3_A/I differ from the SM15T27A variant?
The SM15T27CAHE3_A/I is bidirectional (CA), whereas SM15T27A is unidirectional (A). Their VWM, VBR, and VC values are identical, but the CA version clamps symmetrically across both polarities - essential for protecting differential or AC signals. The HE3 suffix confirms AEC-Q101 qualification for both, but only the CA variant supports polarity-agnostic placement.
SM15T27CAHE3_A/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:
- 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/I FAQ
1.How can I place an order for SM15T27CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T27CAHE3_A/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 SM15T27CAHE3_A/I reliable?
The price and inventory of SM15T27CAHE3_A/I 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/I is usually 5 days.
3.What payment methods are accepted for SM15T27CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T27CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T27CAHE3_A/I?
SM15T27CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T27CAHE3_A/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 SM15T27CAHE3_A/I?
For technical support, including SM15T27CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T27CAHE3_A/I requirements.
6.How does Aetrix verify that SM15T27CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SM15T27CAHE3_A/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 SM15T27CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SM15T27CAHE3_A/I?
All SM15T27CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM15T27CAHE3_A/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 SM15T27CAHE3_A/I part is unused and in its original packaging.
Return procedure for SM15T27CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T27CAHE3_A/I Tags
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