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Vishay General Semiconductor - Diodes Division SM15T12CA-E3/9AT
- Part No.:
- SM15T12CA-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T12CA-E3/9AT.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,537
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Product details
Overview
SM15T12CA-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), 12 V stand-off voltage (VWM), 16.7 V maximum clamping voltage at 90 A IPPM, and −65 °C to +150 °C operating junction temperature. It protects signal lines and power rails in automotive sensor interfaces against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T12CA-E3/9AT datasheet, SM15T12CA-E3/9AT pinout, SM15T12CA-E3/9AT application, or SM15T12CA-E3/9AT equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (1.39), RoHS-compliant matte tin plating, MSL Level 1 rating, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with breakdown voltage (VBR) of 11.4–12.6 V at 1.0 mA test current and reverse leakage ≤5.0 μA at 10.2 V stand-off. Its low dynamic impedance enables fast response to transients up to 90 A peak pulse current (IPPM) under 10/1000 μs waveform.
The device uses glass-passivated silicon junction technology, exhibits typical thermal resistance RθJA of 75 °C/W, and maintains stable clamping performance across −65 °C to +150 °C junction temperature range. It meets JESD201 Class 2 whisker resistance and is qualified per J-STD-020 for reflow up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 10.2 V - Maximum continuous reverse working voltage before significant leakage; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 11.4–12.6 V at 1.0 mA - Confirmed symmetrical breakdown in both directions; ensures predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 16.7 V at 90 A IPPM (10/1000 μs) - Limits transient voltage seen by protected IC/MOSFET; clamping ratio = 1.39. |
| PPPM (Peak Pulse Power) | 1500 W - Withstands high-energy surges from lightning or inductive switching without degradation when mounted per recommended pad layout. |
| Package | SMC (DO-214AB) - Surface-mount package with 7.75 mm × 6.22 mm footprint; supports automated placement and meets UL 94 V-0 flammability. |
| RoHS & Finish | E3 suffix - RoHS-compliant, matte tin-plated leads, solderable per J-STD-002/JESD22-B102, JESD201 Class 2 whisker resistant. |
Pinout & Package
SM15T12CA-E3/9AT is a bidirectional two-terminal device in SMC (DO-214AB) package with no polarity marking. Terminals are symmetrical: both ends function identically as transient-current entry/exit points under reverse or forward surge conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Bidirectional Anode/Cathode | Either terminal accepts transient current in either direction; no cathode band marking distinguishes polarity. |
| Terminal 2 | Bidirectional Anode/Cathode | Electrically identical to Terminal 1; enables symmetrical PCB layout and eliminates orientation constraints during assembly. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV line-earth) when properly mounted on 8 mm × 8 mm copper pads. |
| Low clamping voltage (16.7 V @ 90 A) | Provides tighter voltage limiting than unidirectional variants with same VWM, reducing stress on downstream 12 V logic or analog circuitry. |
| Glass-passivated junction | Ensures stable leakage (<5 μA) and long-term reliability under thermal cycling and humidity exposure in automotive and industrial environments. |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free reflow without moisture sensitivity concerns; eliminates baking requirement prior to assembly. |
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 engine control units against load-dump and ISO 7637-2 pulses. IC Role / Device Role: Bidirectional voltage clamp placed across differential signal pair or supply rail to shunt transient energy to ground. Use Value: Maintains signal integrity during 100 V/50 ms load dump events by clamping to ≤16.7 V, preventing latch-up or damage to 12 V-rated interface ICs. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to inductive kickback from solenoid valves and contactors. IC Role / Device Role: Parallel-connected transient suppressor on 24 V DC input lines to absorb 1500 W surges induced by relay coil de-energization. Use Value: Enables compliance with IEC 61000-4-4 EFT (4 kV) and IEC 61000-4-5 surge immunity standards without additional series impedance. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Secondary-side transient suppression on Ethernet PHY power rails (3.3 V/5 V) and RS-485 data lines in network switches and base stations. IC Role / Device Role: Low-capacitance bidirectional clamp minimizing signal distortion while providing ±15 kV ESD (IEC 61000-4-2) and surge protection. Use Value: Delivers <10 pF junction capacitance at zero bias, preserving signal rise/fall times on 100 Mbps+ differential buses. |
Use Scenario: Input-stage surge protection in AC-DC adapters for smart home devices, guarding bridge rectifier outputs and primary-side controllers. IC Role / Device Role: Standoff-rated clamp placed between bulk capacitor and switching controller to limit voltage overshoot during hot-plug or lightning coupling. Use Value: Survives repeated 1500 W transients without parametric shift, supporting >10-year field life in consumer-grade power supplies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12CA | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher clamping voltage (20.1 V @ 20.9 A), lower IPPM (20.9 A). | Not suitable for IEC 61000-4-5 Level 4; limited to low-energy ESD/EFT scenarios on low-voltage signal lines. | Select SMAJ12CA only when board space is constrained and surge threat level is ≤1 kV. |
| SMCJ12CA | Same SMC package, higher PPPM (1500 W), identical VWM/VBR/VC specs, but rated for 100 A IPPM (vs. 90 A for SM15T12CA-E3/9AT). | Offers 11% higher surge current margin; preferred for designs requiring headroom beyond minimum 90 A requirement. | Choose SMCJ12CA when validating to MIL-STD-1275E or ISO 16750-2 with extended surge duration. |
Compared with SMAJ12CA and SMCJ12CA, SM15T12CA-E3/9AT delivers identical clamping performance in the SMC footprint but with verified 90 A surge capability and RoHS-compliant E3 termination-making it optimal for cost-sensitive automotive and industrial designs where full 1500 W rating must be maintained without over-spec'ing.
Availability
SM15T12CA-E3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer power adapter input stages requiring stable component supply and AEC-Q101-compatible surge resilience.
Supply support for SM15T12CA-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, TVS devices, and optoelectronics 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 bidirectional symmetry are mandatory.
FAQ
What is the clamping voltage of SM15T12CA-E3/9AT at its rated peak pulse current?
The SM15T12CA-E3/9AT has a maximum clamping voltage (VC) of 16.7 V when subjected to its rated peak pulse current (IPPM) of 90 A under the standard 10/1000 μs waveform. This value is measured with the device mounted on 8.0 mm × 8.0 mm copper pads per JEDEC guidelines, ensuring repeatable thermal performance in real-world PCB layouts.
Is SM15T12CA-E3/9AT suitable for automotive applications requiring AEC-Q101 qualification?
No-SM15T12CA-E3/9AT carries the E3 suffix, indicating RoHS-compliant commercial grade. For AEC-Q101 qualification, the correct part is SM15T12CAHE3_A/I (with HE3 suffix). The SM15T12CA-E3/9AT itself is not AEC-Q101 qualified, though it shares identical electrical specs and package with the qualified variant.
Does SM15T12CA-E3/9AT have polarity markings on its SMC package?
No. As a bidirectional TVS, SM15T12CA-E3/9AT has no cathode band or polarity marking on the SMC (DO-214AB) package. Both terminals are functionally identical, allowing unrestricted orientation during automated placement and eliminating risk of incorrect installation.
What is the maximum reverse leakage current for SM15T12CA-E3/9AT at its stand-off voltage?
The SM15T12CA-E3/9AT exhibits a maximum reverse leakage current (ID) of 5.0 μA at its rated stand-off voltage (VWM) of 10.2 V, measured at 25 °C ambient. This low leakage ensures minimal power loss in always-on circuits such as automotive wake-up lines or battery-backed sensor interfaces.
Can SM15T12CA-E3/9AT be used in place of a unidirectional TVS like SM15T12A?
Only if bidirectional protection is required. SM15T12CA-E3/9AT provides symmetrical clamping in both directions, whereas SM15T12A is unidirectional and features a cathode band. Substituting SM15T12CA-E3/9AT for SM15T12A introduces no electrical harm but may increase cost and board area unnecessarily where polarity-aware suppression suffices.
SM15T12CA-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):
- 10.2V
- Voltage - Breakdown (Min):
- 11.4V
- Voltage - Clamping (Max) @ Ipp:
- 16.7V
- Current - Peak Pulse (10/1000µs):
- 90A
- 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)
SM15T12CA-E3/9AT FAQ
1.How can I place an order for SM15T12CA-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T12CA-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 SM15T12CA-E3/9AT reliable?
The price and inventory of SM15T12CA-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 SM15T12CA-E3/9AT is usually 5 days.
3.What payment methods are accepted for SM15T12CA-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T12CA-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T12CA-E3/9AT?
SM15T12CA-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T12CA-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 SM15T12CA-E3/9AT?
For technical support, including SM15T12CA-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T12CA-E3/9AT requirements.
6.How does Aetrix verify that SM15T12CA-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SM15T12CA-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 SM15T12CA-E3/9AT meets industry standards.
7.What is the process for return or replacement of SM15T12CA-E3/9AT?
All SM15T12CA-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SM15T12CA-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 SM15T12CA-E3/9AT part is unused and in its original packaging.
Return procedure for SM15T12CA-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T12CA-E3/9AT Tags
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