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Vishay General Semiconductor - Diodes Division SM15T15CA-E3/9AT
- Part No.:
- SM15T15CA-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T15CA-E3/9AT.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,826
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Product details
Overview
SM15T15CA-E3/9AT 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), 15 V standoff voltage (VWM), and 21.2 V maximum clamping voltage at 71 A peak pulse current. It protects signal lines and power rails in automotive sensor units and industrial I/O interfaces against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T15CA-E3/9AT datasheet, SM15T15CA-E3/9AT pinout, SM15T15CA-E3/9AT application, or SM15T15CA-E3/9AT equivalent, key selection criteria include bidirectional clamping behavior, 15 V working voltage compatibility with 3.3 V–15 V logic/power domains, low clamping ratio (1.41), and AEC-Q101 qualification readiness via HE3/HM3 variants.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) specified at 14.3–15.8 V (min/max) under 1 mA test current. Its clamping performance is characterized at 71 A IPPM (10/1000 μs), delivering VC ≤ 21.2 V - critical for safeguarding 15 V-rated ICs like CAN transceivers or motor drivers.
Thermal design relies on RθJA = 75 °C/W (typ.) and RθJL = 15 °C/W (typ.), requiring minimum 8.0 mm × 8.0 mm copper pads per terminal per Vishay's derating curves. The device fails short-circuit under overstress, aligning with IEC 61000-4-5 Level 4 surge immunity requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - Maximum continuous reverse operating voltage before leakage exceeds 1 μA; matches 15 V supply rails or 3.3 V/5 V logic with margin. |
| VBR (min/max) | 14.3 V / 15.8 V at 1 mA - Ensures reliable turn-on before damaging overvoltage reaches protected circuitry. |
| VC @ IPPM | 21.2 V at 71 A (10/1000 μs) - Clamps transients to safe level for 15 V-rated components; clamping ratio = 1.41. |
| PPPM | 1500 W - Withstands lightning surges (IEC 61000-4-5) and inductive kickback without degradation when properly mounted. |
| Package | SMC (DO-214AB) - Surface-mount, low-inductance package compatible with automated assembly; JEDEC-compliant footprint. |
| TJ max | +150 °C - Enables operation in under-hood automotive and industrial environments with high ambient temperatures. |
Pinout & Package
SM15T15CA-E3/9AT uses the SMC (DO-214AB) package: molded epoxy case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1, 260 °C reflow peak. No polarity marking - bidirectional symmetry eliminates cathode/anode orientation concerns during placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional transient conduction path | Both terminals function identically; connects across protected line and ground (or between differential lines) without polarity constraint. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Supports IEC 61000-4-5 Level 4 (4 kV/2 Ω) surge testing without failure when PCB layout meets pad recommendations. |
| Low clamping voltage (21.2 V @ 71 A) | Provides tighter protection margin than standard 15 V Zener diodes, reducing risk of latch-up or gate oxide damage in downstream MOSFETs/ICs. |
| Glass passivated junction | Ensures stable VBR and low leakage (<1 μA at VWM) over temperature and lifetime, critical for battery-powered sensors. |
| RoHS-compliant, halogen-free option available | E3 suffix denotes commercial-grade RoHS compliance; M3 suffix adds halogen-free certification for strict environmental programs. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting LIN/CAN bus nodes and analog sensor outputs (e.g., pressure, temperature) in engine control modules from load-dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and chassis ground, responding within <1 ns to transients. Use Value: Prevents false triggering and permanent damage to 12 V–15 V rail-connected microcontrollers and transceivers during ISO 7637-2 pulse 5a/b events. | Use Scenario: Shielding digital input/output channels of programmable logic controllers from inductive switching noise generated by solenoids and contactors. IC Role / Device Role / Timing Role: Transient shunt across 24 V DC input terminals, diverting energy away from optocoupler inputs and microcontroller GPIOs. Use Value: Maintains functional safety integrity by limiting voltage excursions to ≤21.2 V during 1 kV/500 A surge events per IEC 61000-4-4. |
| Telecom Line Interface | Consumer Power Adapter ESD Protection |
Use Scenario: Guarding Ethernet PHY interface pins and auxiliary power lines in PoE-enabled switches against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary-level TVS on RJ45 jack side, coordinated with secondary GDT or polymer PTC for staged protection. Use Value: Absorbs up to 1500 W of coupled surge energy while maintaining <10 pF junction capacitance to avoid signal integrity degradation at 100 MHz. | Use Scenario: Safeguarding USB-C and barrel-jack input stages of wall adapters against user-handling ESD (±15 kV air, ±8 kV contact) and AC-line transients. IC Role / Device Role / Timing Role: First-line clamping device between input rectifier output and primary-side controller, operating bidirectionally across DC bus. Use Value: Eliminates need for separate unidirectional devices on +VIN/GND and -VIN/GND paths, simplifying BOM and layout for dual-polarity input designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15CA | 600 W PPPM rating, same VWM/VC, SMA package (smaller thermal mass) | Limited to lower-energy threats (IEC 61000-4-2/4-4); unsuitable for lightning-level surges | Select when space-constrained and threat profile excludes >1 kV line surges. |
| SMCJ15CA | 1500 W PPPM, identical VWM/VC, same SMC package but higher VBR tolerance (14.3–17.1 V) | Wider VBR spread increases clamping uncertainty; less precise protection for tight-margin circuits | Choose only if legacy SMCJ footprint reuse is mandatory and VBR variation is acceptable. |
Compared with SMAJ15CA and SMCJ15CA, SM15T15CA-E3/9AT delivers identical 1500 W surge handling and tighter 14.3–15.8 V VBR range in the same SMC package - enabling drop-in replacement where precision clamping and full lightning immunity are required without layout change.
Availability
SM15T15CA-E3/9AT is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, telecom line interfaces, and consumer power adapter designs requiring stable component supply with consistent surge performance across production batches.
Supply support for SM15T15CA-E3/9AT 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, and protection devices with emphasis on reliability, power handling, and automotive qualification.
The SM15T Series was engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where 1500 W surge immunity and AEC-Q101 readiness are essential.
FAQ
What is the peak pulse current rating of SM15T15CA-E3/9AT?
The SM15T15CA-E3/9AT has a peak pulse current (IPPM) of 71 A under the standard 10/1000 μs waveform. This value is derived directly from its 1500 W peak pulse power rating and 21.2 V clamping voltage (P = V × I), and is validated per Figure 3 in Vishay document 88380. The SM15T15CA-E3/9AT maintains this rating when mounted on 8.0 mm × 8.0 mm copper pads per terminal.
Is SM15T15CA-E3/9AT RoHS-compliant and halogen-free?
Yes, SM15T15CA-E3/9AT carries the "E3" suffix, indicating it is RoHS-compliant and commercial grade per Vishay's ordering nomenclature. It is not halogen-free; for halogen-free compliance, the "M3" suffix variant (e.g., SM15T15CA-M3/9AT) must be selected. Both meet JESD 201 Class 2 whisker resistance requirements.
Does SM15T15CA-E3/9AT have polarity markings on the package?
No, SM15T15CA-E3/9AT does not have polarity markings because it is a bidirectional TVS diode. Unlike unidirectional variants (which feature a cathode band), the SM15T15CA-E3/9AT exhibits symmetrical electrical characteristics in both directions - eliminating the need for orientation during PCB placement or assembly.
What is the maximum clamping voltage of SM15T15CA-E3/9AT at rated peak pulse current?
The maximum clamping voltage (VC) of SM15T15CA-E3/9AT is 21.2 V at 71 A peak pulse current (10/1000 μs waveform), as specified in Table 1 of Vishay document 88380. This value represents the upper limit of voltage seen by protected circuitry during worst-case surge events and is measured under standardized test conditions with proper PCB thermal management.
Can SM15T15CA-E3/9AT be used in automotive applications requiring AEC-Q101 qualification?
The SM15T15CA-E3/9AT itself is not AEC-Q101 qualified; it is commercial-grade. However, Vishay offers AEC-Q101-qualified versions under the HE3 (RoHS-compliant) and HM3 (halogen-free + RoHS) suffixes - e.g., SM15T15CAHE3_A/I. For automotive use, specify the HE3 or HM3 variant explicitly; SM15T15CA-E3/9AT is intended for industrial and consumer applications where qualification is not mandated.
SM15T15CA-E3/9AT 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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 12.8V
- Voltage - Breakdown (Min):
- 14.3V
- Voltage - Clamping (Max) @ Ipp:
- 21.2V
- Current - Peak Pulse (10/1000µs):
- 71A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SM15T15CA-E3/9AT FAQ
1.How can I place an order for SM15T15CA-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T15CA-E3/9AT 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 SM15T15CA-E3/9AT reliable?
The price and inventory of SM15T15CA-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T15CA-E3/9AT is usually 5 days.
3.What payment methods are accepted for SM15T15CA-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T15CA-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T15CA-E3/9AT?
SM15T15CA-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T15CA-E3/9AT 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 SM15T15CA-E3/9AT?
For technical support, including SM15T15CA-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T15CA-E3/9AT requirements.
6.How does Aetrix verify that SM15T15CA-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SM15T15CA-E3/9AT 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 SM15T15CA-E3/9AT meets industry standards.
7.What is the process for return or replacement of SM15T15CA-E3/9AT?
All SM15T15CA-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SM15T15CA-E3/9AT, 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 SM15T15CA-E3/9AT part is unused and in its original packaging.
Return procedure for SM15T15CA-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T15CA-E3/9AT Tags
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