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Vishay General Semiconductor - Diodes Division 1.5SMC11A-E3/9AT
- Part No.:
- 1.5SMC11A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC11A-E3/9AT.pdf
- Description:
- TVS DIODE 9.4VWM 15.6VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:3,664
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Product details
Overview
1.5SMC11A-E3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 11 V breakdown voltage (VBR min/max: 10.5–11.6 V at 1 mA), 9.4 V stand-off voltage (VWM), clamps to ≤15.6 V at 96.2 A peak pulse current (10/1000 µs), and delivers 1500 W peak pulse power. It is used to protect MOSFETs, ICs, and sensor interfaces against lightning-induced transients and inductive switching surges in automotive and industrial power supplies.
For engineers reviewing the 1.5SMC11A-E3/9AT datasheet, 1.5SMC11A-E3/9AT pinout, 1.5SMC11A-E3/9AT application, or 1.5SMC11A-E3/9AT equivalent, key selection criteria include unidirectional polarity, SMC (DO-214AB) package compatibility, clamping voltage under surge, thermal resistance (RθJA = 75 °C/W), and AEC-Q101 qualification status - critical for automotive-grade reliability validation.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VWM (9.4 V), it transitions rapidly from high-impedance to low-impedance state, diverting surge current away from downstream circuitry. Its glass-passivated junction ensures stable breakdown and low leakage (<5 µA at VWM).
It is rated for non-repetitive 10/1000 µs waveform pulses up to 1500 W, with derating above 25 °C per Fig. 2; maximum junction temperature is 150 °C, and thermal resistance from junction-to-ambient is 75 °C/W on standard 8.0 mm × 8.0 mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 10.5 V / 11.6 V at 1 mA test current - defines precise breakdown onset for reliable triggering margin |
| VWM | 9.4 V - maximum continuous reverse operating voltage before leakage rises significantly |
| VC @ IPPM | ≤15.6 V at 96.2 A - clamping voltage during full 1500 W surge, limiting stress on protected ICs |
| PPPM | 1500 W - peak pulse power handling capability with 10/1000 µs waveform, duty cycle ≤0.01 % |
| IPPM | 96.2 A - maximum non-repetitive peak pulse current the device safely clamps without failure |
| RθJA | 75 °C/W - thermal resistance determines required PCB copper area for sustained power dissipation |
| TJ max | 150 °C - maximum allowable junction temperature, constraining ambient and layout design |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads; meets UL 94 V-0, MSL level 1 (260 °C reflow), and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-biased anode connection point | Connected to protected line; conducts surge current to ground when voltage exceeds VWM |
| Anode | Reference/ground return path | Typically tied to system ground; completes shunt path for transient energy diversion |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 µs) | Enables protection against severe lightning and load-dump transients without derating in compact layouts |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes voltage overshoot across protected devices, improving margin for 12 V rail ICs |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage (<5 µA) over temperature and lifetime |
| RoHS-compliant, commercial grade (E3 suffix) | Meets environmental compliance requirements without halogen restrictions; suitable for general industrial use |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking |
Applications
| Automotive Power Supply Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protects 12 V power rails in body control modules from ISO 7637-2 pulse 1 (inductive switch-off) and pulse 5a (load dump). IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between battery rail and DC-DC input, clamping transients within 1 ns response time. Use Value: Limits voltage to ≤15.6 V during 96.2 A surge, preventing latch-up or gate oxide damage in downstream PMICs and microcontrollers. |
Use Scenario: Shields analog front-end inputs of pressure/temperature sensors in factory automation PLCs from ESD and motor-switching noise. IC Role / Device Role / Timing Role: Mounted directly at connector entry point, acting as first-line defense before signal conditioning amplifiers. Use Value: Clamps fast transients while maintaining <5 µA leakage at 9.4 V, preserving sensor offset accuracy and low-power sleep mode integrity. |
| Telecom Line Card Surge Protection | Consumer Power Adapter Input Stage |
Use Scenario: Installed on AC/DC primary-side rectifier outputs in telecom base station power supplies to absorb lightning-induced surges. IC Role / Device Role / Timing Role: Unidirectional TVS parallel to bulk capacitor, triggered only during overvoltage events, not during normal operation. Use Value: Withstands repetitive 1500 W pulses at 0.01 % duty cycle, enabling compliance with ITU-T K.20/21 immunity standards. |
Use Scenario: Used across bridge rectifier output in universal-input AC/DC adapters to suppress differential-mode surges from mains transients. IC Role / Device Role / Timing Role: Shunt protector between +VOUT and GND, activated only during overvoltage, with no standby power loss. Use Value: Delivers 1500 W surge capacity in SMC footprint, eliminating need for larger DO-214AA or discrete MOV+TVS stacks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ11A | Lower peak power rating (400 W), smaller SMA package (DO-214AC), higher RθJA (~110 °C/W) | Not suitable for 1500 W surge environments; limited to lower-energy transients in space-constrained consumer designs | Select only if board space is critical and surge threat level is ≤400 W (e.g., USB port protection) |
| 1.5KE11A | Through-hole TO-204AE (DO-201AE) package, same 1500 W rating but slower response due to higher parasitic inductance | Requires PCB through-holes and larger layout; less effective for fast-rising ESD or high-frequency transients | Prefer for legacy through-hole production or where thermal mass outweighs speed requirements |
Compared with SMAJ11A and 1.5KE11A, the 1.5SMC11A-E3/9AT offers optimal balance of high-surge capability, surface-mount compatibility, and fast clamping - making it the preferred choice for new automotive and industrial SMT designs requiring 1500 W protection in minimal footprint.
Availability
1.5SMC11A-E3/9AT is available at Aetrix Electronics and suitable for automotive power systems, industrial sensor interfaces, telecom line cards, and consumer power adapter designs requiring stable component supply, RoHS compliance, and consistent SMC (DO-214AB) packaging.
Supply support for 1.5SMC11A-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, precision, and application-specific performance.
The 1.5SMC Series was developed to deliver high-power transient suppression in compact SMC packages for automotive, industrial, and telecom applications where space, thermal performance, and surge immunity are critical.
FAQ
What is the polarity configuration of the 1.5SMC11A-E3/9AT?
The 1.5SMC11A-E3/9AT is a unidirectional TVS diode: its cathode is marked by a band on the SMC (DO-214AB) package body and must be connected toward the protected line, while the anode connects to ground. This configuration allows conduction only during reverse-voltage transients, ensuring no forward conduction during normal operation.
Does the 1.5SMC11A-E3/9AT meet AEC-Q101 qualification?
No - the 1.5SMC11A-E3/9AT uses the "E3" suffix, indicating RoHS-compliant commercial grade. AEC-Q101 qualified versions carry "HE3" or "HM3" suffixes (e.g., 1.5SMC11AHE3_A). The 1.5SMC11A-E3/9AT is not tested or certified to AEC-Q101 stress requirements and should not be deployed in automotive safety-critical applications without additional validation.
What is the maximum clamping voltage for the 1.5SMC11A-E3/9AT under surge conditions?
The 1.5SMC11A-E3/9AT clamps to a maximum of 15.6 V when subjected to its rated peak pulse current of 96.2 A (10/1000 µs waveform). This value is guaranteed per Vishay's datasheet (Document Number: 88303, Rev. 09-Mar-2026) and defines the upper voltage limit imposed on protected circuitry during worst-case transient events.
How does the 1.5SMC11A-E3/9AT differ from bidirectional variants like 1.5SMC11CA?
The 1.5SMC11A-E3/9AT is unidirectional and protects against reverse-polarity surges only, whereas 1.5SMC11CA is bidirectional and suppresses transients of either polarity. Bidirectional types lack polarity marking and exhibit symmetric VBR in both directions; unidirectional 1.5SMC11A-E3/9AT provides tighter leakage control and is preferred for DC rail protection where polarity is fixed.
What PCB pad layout is recommended for optimal thermal performance of the 1.5SMC11A-E3/9AT?
Vishay specifies mounting on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal to achieve rated 1500 W pulse power and thermal resistance of 75 °C/W. Reducing pad size increases RθJA, degrading surge capability and risking thermal runaway under repeated pulses - always follow the layout in Figure 6 of the 1.5SMC11A-E3/9AT datasheet.
1.5SMC11A-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):
- 9.4V
- Voltage - Breakdown (Min):
- 10.5V
- Voltage - Clamping (Max) @ Ipp:
- 15.6V
- Current - Peak Pulse (10/1000µs):
- 96.2A
- 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)
1.5SMC11A-E3/9AT FAQ
1.How can I place an order for 1.5SMC11A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC11A-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 1.5SMC11A-E3/9AT reliable?
The price and inventory of 1.5SMC11A-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 1.5SMC11A-E3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC11A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC11A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC11A-E3/9AT?
1.5SMC11A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC11A-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 1.5SMC11A-E3/9AT?
For technical support, including 1.5SMC11A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC11A-E3/9AT requirements.
6.How does Aetrix verify that 1.5SMC11A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC11A-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 1.5SMC11A-E3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC11A-E3/9AT?
All 1.5SMC11A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC11A-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 1.5SMC11A-E3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC11A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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