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Vishay General Semiconductor - Diodes Division 1.5SMC12A-E3/9AT
- Part No.:
- 1.5SMC12A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC12A-E3/9AT.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:9,645
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Product details
Overview
1.5SMC12A-E3/9AT from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection. It features 12 V breakdown voltage (VBR = 11.4–12.6 V at 1 mA), 10.2 V stand-off voltage (VWM), and clamps transients to ≤16.7 V at 89.8 A peak pulse current (10/1000 µs), delivering 1500 W peak pulse power for automotive and industrial power-line protection.
For engineers reviewing the 1.5SMC12A-E3/9AT datasheet, 1.5SMC12A-E3/9AT pinout, 1.5SMC12A-E3/9AT application, or 1.5SMC12A-E3/9AT equivalent, this device serves as a RoHS-compliant, commercial-grade TVS with MSL Level 1 rating, low incremental surge resistance, and fast response time - critical for safeguarding MOSFETs, ICs, and sensor signal lines against lightning-induced and inductive-switching transients.
Technical Context
The 1.5SMC12A-E3/9AT operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold (11.4–12.6 V). Its glass-passivated junction ensures stable clamping performance under repetitive 10/1000 µs surges at 0.01% duty cycle, with thermal resistance of 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-leads).
It is rated for continuous power dissipation of 6.5 W at 50 °C on infinite heatsink, supports 200 A non-repetitive forward surge current (8.3 ms half-sine), and maintains operation across -65 °C to +150 °C junction temperature range - enabling use in harsh automotive and industrial environments without derating below 25 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 11.4 V / 12.6 V at 1 mA - defines precise avalanche onset for reliable overvoltage triggering |
| VWM | 10.2 V - maximum continuous reverse operating voltage before leakage exceeds 5 µA |
| VC @ IPPM | ≤16.7 V at 89.8 A - clamping voltage during 1500 W transient, limiting downstream stress |
| IPPM | 89.8 A (10/1000 µs waveform) - peak surge current handling capacity for lightning-level events |
| PPPM | 1500 W - peak pulse power rating, enabling robust protection of 12 V DC systems |
| TJ max | +150 °C - allows operation in under-hood automotive or high-temperature industrial enclosures |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 0.320" x 0.246" footprint and matte tin leads |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, single-axis cathode-banded case. Dimensions: 7.11 mm × 6.22 mm × 2.62 mm (L × W × H); mounting pad layout per Vishay spec: 8.0 mm × 8.0 mm copper pads per terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or low-side reference in unidirectional TVS configuration |
| Cathode (banded end) | Reverse-biased clamping terminal | Connected to protected line (e.g., 12 V rail or signal input); conducts during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 µs) | Enables protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 12 V lines without derating |
| Glass passivated chip junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity exposure |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements |
| AEC-Q101 qualified variant available | HE3 suffix option enables drop-in qualification for automotive powertrain and body electronics |
| Low incremental surge resistance | Minimizes clamping overshoot during fast-rising transients (<1 ns response), improving IC survivability |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs, lighting modules, and infotainment power inputs from load-dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground, clamping surges within 1 ns to prevent latch-up or gate oxide damage in downstream regulators and microcontrollers. Use Value: Clamps to ≤16.7 V at 89.8 A, keeping rail voltage within safe operating area of 16 V-rated components while surviving repeated 1500 W pulses. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) in PLC I/O modules from ESD and field-wiring induced noise. IC Role / Device Role / Timing Role: Low-capacitance TVS (typ. <100 pF) placed at connector interface, shunting fast transients before they reach precision op-amps or ADC front-ends. Use Value: Maintains signal integrity with minimal loading due to low dynamic impedance and sub-1 ns response, preserving measurement accuracy in 4–20 mA or 0–10 V loops. |
| Telecom Power Supply Input | Consumer Appliance Motor Drive Protection |
|
Use Scenario: Safeguarding AC/DC adapter secondary-side outputs (12 V/24 V) against lightning-induced surges entering via PoE or external wiring. IC Role / Device Role / Timing Role: Primary overvoltage clamp on DC output rail, coordinated with upstream MOVs and fuse to meet UL 62368-1 surge immunity requirements. Use Value: Delivers 1500 W pulse handling with <5% VBR tolerance, ensuring consistent clamping across production lots and temperature range (-65 °C to +150 °C). |
Use Scenario: Suppressing inductive kickback from brushed DC motors in washing machines, HVAC blowers, and power tools. IC Role / Device Role / Timing Role: Mounted across motor terminals or H-bridge outputs to absorb stored inductive energy during PWM switching transitions. Use Value: Withstands 200 A 8.3 ms surge current and 1500 W peak power, preventing MOSFET avalanche failure and reducing need for snubber RC networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12A | Same VWM (10.2 V) and VC (16.7 V), but lower PPPM (600 W) and smaller SMB package (DO-214AA) | Limited to lower-energy transients (IEC 61000-4-5 Level 2); unsuitable for automotive load-dump or industrial 4 kV testing | Select when board space is constrained and surge threat level is ≤600 W; verify thermal margin with RθJA = 110 °C/W |
| 1.5KE12A | Through-hole TO-204AE (DO-41) package; identical electrical specs but higher RθJA (60 °C/W) and no MSL rating | Not suitable for automated SMT assembly; requires wave soldering and manual placement; lacks J-STD-020 compliance | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with SMBJ12A and 1.5KE12A, the 1.5SMC12A-E3/9AT delivers full 1500 W surge capability in an MSL Level 1 SMT package - making it the optimal choice for volume-manufactured automotive and industrial systems requiring both high energy handling and process reliability.
Availability
1.5SMC12A-E3/9AT is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interfaces, telecom power supplies, and consumer appliance motor drives requiring stable component supply, RoHS compliance, and AEC-Q101-ready sourcing options.
Supply support for 1.5SMC12A-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 efficiency, and ruggedized packaging.
The 1.5SMC Series was engineered specifically for high-power, surface-mount transient suppression in automotive, industrial, and telecom infrastructure - balancing clamping precision, surge endurance, and manufacturability in DO-214AB form factor.
FAQ
What is the breakdown voltage tolerance of the 1.5SMC12A-E3/9AT?
The 1.5SMC12A-E3/9AT has a specified breakdown voltage (VBR) range of 11.4 V to 12.6 V at 1 mA test current, representing ±5% tolerance around the nominal 12 V rating. This tight tolerance ensures predictable clamping behavior across production lots and temperature extremes, critical for protecting 12 V systems where overvoltage margins are narrow.
Is the 1.5SMC12A-E3/9AT RoHS-compliant and halogen-free?
Yes, the 1.5SMC12A-E3/9AT carries the "E3" suffix, indicating full RoHS compliance per EU Directive 2011/65/EU and exemption 7a. It is not halogen-free; for halogen-free compliance, the "M3" suffix variant (e.g., 1.5SMC12A-M3/9AT) must be selected. Both variants meet JESD201 Class 2 whisker resistance and J-STD-002 solderability standards.
Can the 1.5SMC12A-E3/9AT be used in bidirectional configurations?
No - the 1.5SMC12A-E3/9AT is strictly unidirectional, identified by its cathode band marking. For bidirectional operation, Vishay specifies the "CA" suffix (e.g., 1.5SMC12CA), which provides symmetrical clamping in both polarities. Using the 1.5SMC12A-E3/9AT in reverse-biased signal paths risks permanent conduction and failure.
What is the maximum clamping voltage of the 1.5SMC12A-E3/9AT under surge conditions?
The 1.5SMC12A-E3/9AT clamps to a maximum of 16.7 V when subjected to its rated peak pulse current of 89.8 A (10/1000 µs waveform). This value is guaranteed across temperature and lifetime, and represents the upper limit of voltage seen by protected circuitry during worst-case surge events - essential for validating safe operating area of downstream 16 V-rated ICs.
Does the 1.5SMC12A-E3/9AT require derating at elevated ambient temperatures?
Yes - the 1.5SMC12A-E3/9AT must be derated above 25 °C ambient per Figure 2 in Vishay document 88303. At 70 °C ambient, its peak pulse power drops to ~850 W (57% of 1500 W), and at 100 °C, to ~500 W. Derating ensures junction temperature remains ≤150 °C; proper PCB copper area (8.0 mm × 8.0 mm per pad) is mandatory to achieve published ratings.
1.5SMC12A-E3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 10.2V
- Voltage - Breakdown (Min):
- 11.4V
- Voltage - Clamping (Max) @ Ipp:
- 16.7V
- Current - Peak Pulse (10/1000µs):
- 89.8A
- 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)
1.5SMC12A-E3/9AT FAQ
1.How can I place an order for 1.5SMC12A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC12A-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 1.5SMC12A-E3/9AT reliable?
The price and inventory of 1.5SMC12A-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 1.5SMC12A-E3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC12A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC12A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC12A-E3/9AT?
1.5SMC12A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC12A-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 1.5SMC12A-E3/9AT?
For technical support, including 1.5SMC12A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC12A-E3/9AT requirements.
6.How does Aetrix verify that 1.5SMC12A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC12A-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 1.5SMC12A-E3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC12A-E3/9AT?
All 1.5SMC12A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC12A-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 1.5SMC12A-E3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC12A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC12A-E3/9AT Tags
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