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Vishay General Semiconductor - Diodes Division SM15T27CAHE3/9AT
- Part No.:
- SM15T27CAHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T27CAHE3/9AT.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,530
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Product details
Overview
SM15T27CAHE3/9AT 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 and I/O interfaces against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T27CAHE3/9AT datasheet, SM15T27CAHE3/9AT pinout, SM15T27CAHE3/9AT application, or SM15T27CAHE3/9AT equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 1500 W surge rating, low clamping ratio (VC/VBR ≈ 1.37), and compatibility with high-impedance transient sources in automotive and industrial control systems.
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 breakdown behavior and low leakage (<1.0 μA at VWM) over temperature.
Designed for high-energy transient suppression, it sustains 1500 W peak pulse power under 10/1000 μs waveform with thermal resistance RθJA = 75 °C/W and maximum junction temperature of +150 °C. The device fails short-circuit under overstress, enabling predictable system-level fault containment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 23.1 V - Maximum continuous reverse operating voltage before significant leakage; defines safe working margin below clamping threshold. |
| VBR (min/max) | 25.7 V / 28.4 V at 1.0 mA - Confirmed breakdown range ensures reliable turn-on during transients without premature conduction. |
| VC @ IPPM | 37.5 V at 40.0 A (10/1000 μs) - Clamping voltage limits protected circuit stress; clamping ratio = 1.37 supports robust IC-level protection. |
| PPPM | 1500 W - Peak pulse power rating enables survival of lightning-induced surges (IEC 61000-4-5 Level 3/4) and motor-switching transients. |
| TJ max | +150 °C - Enables operation in under-hood automotive environments and industrial enclosures without derating penalties. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per AEC standard. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration with no polarity marking; matte tin-plated leads, RoHS-compliant, MSL level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | One terminal of symmetrical junction; conducts during negative transients relative to cathode reference. |
| Cathode | Transient current entry (positive polarity) | Other terminal of symmetrical junction; conducts during positive transients - functionally identical to anode in bidirectional mode. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and leakage performance in both directions eliminates need for polarity-aware layout. |
| Glass-passivated junction | Stable VBR tolerance (±5%), low leakage (<1.0 μA), and repeatable clamping under repetitive surge stress. |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, ADAS sensors, and body electronics modules. |
| Low-inductance SMC package | Minimizes voltage overshoot during fast-rising transients (e.g., ESD, relay bounce) due to compact leadframe geometry. |
Applications
| Automotive Sensor Protection | Industrial I/O Line Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) in engine bay modules exposed to load-dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and ground, absorbing energy from ±2 kV ESD and 10/1000 μs surges up to 1500 W. Use Value: Maintains signal integrity below 37.5 V clamping threshold while surviving >1000 surge events per AEC-Q101 stress testing. |
Use Scenario: Safeguarding PLC digital input channels connected to field devices (solenoids, limit switches) subject to inductive kickback. IC Role / Device Role / Timing Role: Transient shunt across input terminals, diverting surge current away from optocoupler inputs and microcontroller GPIOs. Use Value: Prevents latch-up and permanent damage by limiting transient voltage to 37.5 V within 1 ns response time, compatible with 24 V DC control systems. |
| Telecom Power Interface | Consumer Device USB Port Protection |
Use Scenario: Secondary surge protection on 48 V PoE-powered equipment front-end, downstream of primary GDT or MOV stages. IC Role / Device Role / Timing Role: Fast-response secondary clamp limiting residual transients to sub-40 V levels before reaching DC-DC converters and PHY ICs. Use Value: Complements upstream protection with precise 23.1 V stand-off and 37.5 V clamping, reducing required voltage margin in 48 V rail design. |
Use Scenario: Protecting USB 2.0 data lines (D+/D−) and VBUS in portable audio/video devices against human-body-model ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed directly at connector, shunting ESD current before reaching USB transceiver. Use Value: Achieves <1 pF junction capacitance (per diode) and 37.5 V clamping, preserving signal rise/fall times while meeting IEC 61000-4-2 ±8 kV contact discharge. |
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 peak power (400 W), higher VC/VBR ratio (1.51), same SMC package but non-AEC-Q101. | Not qualified for automotive under-hood use; suitable only for commercial-grade consumer or office equipment. | Select SMAJ24CA only when surge threat is limited to IEC 61000-4-2 ESD and low-energy switching noise. |
| 1.5KE27CA | Higher VC (45.0 V), axial-leaded DO-201 package, 1500 W rating, no AEC-Q101 qualification. | Requires through-hole assembly and larger PCB area; unsuitable for automated SMT production or space-constrained automotive modules. | Choose 1.5KE27CA only if legacy through-hole design mandates axial package and AEC-Q101 is not required. |
Compared with SMAJ24CA and 1.5KE27CA, SM15T27CAHE3/9AT delivers superior automotive-grade reliability, tighter clamping (37.5 V vs. ≥45 V), and optimized SMT manufacturability - making it the preferred choice for new AEC-Q101-compliant designs requiring high-energy bidirectional protection in compact form factor.
Availability
SM15T27CAHE3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom power interfaces, and consumer USB port protection requiring stable component supply and long-term lifecycle support.
Supply support for SM15T27CAHE3/9AT 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 is designed specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where AEC-Q101 compliance, 1500 W surge handling, and bidirectional symmetry are mandatory.
FAQ
What does the "CA" suffix indicate in SM15T27CAHE3/9AT?
The "CA" suffix denotes a bidirectional configuration: SM15T27CAHE3/9AT provides symmetrical clamping in both polarities, with identical VBR, VC, and leakage characteristics for positive and negative transients. This eliminates polarity marking and simplifies PCB layout versus unidirectional variants like SM15T27AHE3/9AT.
Is SM15T27CAHE3/9AT qualified to AEC-Q101?
Yes, SM15T27CAHE3/9AT is AEC-Q101 qualified - confirmed by Vishay's ordering code suffix "HE3", which designates RoHS-compliant and AEC-Q101-qualified versions. Qualification covers temperature cycling, high-temperature reverse bias, and ESD testing per the AEC standard.
What is the clamping voltage of SM15T27CAHE3/9AT at its rated peak pulse current?
The clamping voltage (VC) of SM15T27CAHE3/9AT is 37.5 V at 40.0 A peak pulse current under the standard 10/1000 μs waveform. This value is measured per Figure 1 in Vishay document 88380 and defines the maximum voltage imposed on protected circuitry during worst-case surge events.
How does SM15T27CAHE3/9AT differ from the SMAJ24CA in surge protection capability?
SM15T27CAHE3/9AT offers 1500 W peak pulse power (vs. 400 W for SMAJ24CA), lower clamping voltage (37.5 V vs. 38.9 V), tighter VBR tolerance (±5% vs. ±10%), and AEC-Q101 qualification - making it suitable for automotive and industrial applications where higher surge energy and reliability are required.
What package type and mounting requirements apply to SM15T27CAHE3/9AT?
SM15T27CAHE3/9AT uses the SMC (DO-214AB) surface-mount package with matte tin-plated leads. It requires 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal for rated power dissipation and meets J-STD-020 MSL level 1 with 260 °C peak reflow profile.
SM15T27CAHE3/9AT 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 (SMCJ)
SM15T27CAHE3/9AT FAQ
1.How can I place an order for SM15T27CAHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T27CAHE3/9AT 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 SM15T27CAHE3/9AT reliable?
The price and inventory of SM15T27CAHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T27CAHE3/9AT is usually 5 days.
3.What payment methods are accepted for SM15T27CAHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T27CAHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T27CAHE3/9AT?
SM15T27CAHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T27CAHE3/9AT 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 SM15T27CAHE3/9AT?
For technical support, including SM15T27CAHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T27CAHE3/9AT requirements.
6.How does Aetrix verify that SM15T27CAHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SM15T27CAHE3/9AT 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 SM15T27CAHE3/9AT meets industry standards.
7.What is the process for return or replacement of SM15T27CAHE3/9AT?
All SM15T27CAHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SM15T27CAHE3/9AT, 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 SM15T27CAHE3/9AT part is unused and in its original packaging.
Return procedure for SM15T27CAHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T27CAHE3/9AT Tags
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