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Vishay General Semiconductor - Diodes Division 1.5SMC11A-M3/9AT
- Part No.:
- 1.5SMC11A-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC11A-M3/9AT.pdf
- Description:
- TVS DIODE 9.4VWM 15.6VC SMC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
1.5SMC11A-M3/9AT from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 11 V breakdown voltage (VBR = 10.5–11.6 V at 1 mA), 9.4 V stand-off voltage (VWM), 15.6 V clamping voltage (VC) at 96.2 A peak pulse current, and 1500 W peak pulse power capability with 10/1000 µs waveform - deployed in automotive sensor interfaces, industrial I/O protection, and DC power rail surge suppression.
For engineers reviewing the 1.5SMC11A-M3/9AT datasheet, 1.5SMC11A-M3/9AT pinout, 1.5SMC11A-M3/9AT application, or 1.5SMC11A-M3/9AT equivalent, key selection criteria include unidirectional polarity, SMC (DO-214AB) package compatibility, clamping performance under 100 A surge, thermal resistance (RθJA = 75 °C/W), and halogen-free RoHS compliance per M3 suffix.
Technical Context
The 1.5SMC11A-M3/9AT operates as a silicon avalanche diode with glass-passivated junction, delivering fast response (<1 ps) to transient events such as ESD, lightning-induced surges, and inductive switching spikes. Its unidirectional configuration enables integration into DC-biased circuits where reverse conduction must be blocked until clamping threshold is exceeded.
It is rated for 1500 W peak pulse power (10/1000 µs), derated linearly above 25 °C ambient per Fig. 2, and supports repetitive surge duty cycle of 0.01 %. Junction temperature range spans −65 °C to +150 °C, with MSL Level 1 moisture sensitivity and matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 10.5 V / 11.6 V at 1 mA - defines precise avalanche initiation window for reliable triggering without premature conduction |
| VWM | 9.4 V - maximum continuous reverse operating voltage before leakage exceeds 5 µA, ensuring stable standby blocking |
| VC @ IPPM | 15.6 V at 96.2 A - clamped voltage during 1500 W transient, limiting downstream IC stress to safe margin below 16 V |
| PPPM | 1500 W - peak surge energy handling capacity with 10/1000 µs waveform, suitable for IEC 61000-4-5 Level 4 compliance |
| IFSM | 200 A - non-repetitive forward surge rating (8.3 ms half-sine), supporting high-energy inrush or fault-current events |
| RθJA | 75 °C/W - thermal resistance from junction to ambient on standard 8 mm × 8 mm copper pads, guiding PCB thermal layout |
| TJ max | +150 °C - maximum junction temperature, enabling operation in under-hood automotive or industrial enclosures |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile plastic case with UL 94 V-0 flammability rating and cathode band marking for polarity identification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to system ground or low-side reference; completes clamping loop during transient |
| Cathode | Protected line connection / Clamping node | Connected to line being protected (e.g., 12 V rail); conducts when VAK ≥ VBR, shunting surge to ground |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables single-device protection against severe transients per IEC 61000-4-5, eliminating need for cascaded TVS stages |
| Glass-passivated junction | Ensures long-term reliability and stable VBR under humidity, thermal cycling, and high-temperature bias stress |
| Halogen-free & RoHS-compliant (M3) | Meets global environmental regulations and eliminates corrosive halogen emissions during reflow or end-of-life processing |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow profiles without baking or special handling, reducing manufacturing overhead |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for 3.3 V/5 V logic interfaces |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load-dump and jump-start transients in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor supply line and chassis ground, clamping >12 V excursions while maintaining 9.4 V nominal operation. Use Value: Limits voltage seen by downstream LDOs and ADCs to ≤15.6 V, preventing latch-up or permanent damage during 12 V system surges up to ±100 V. |
Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers against field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Standoff-connected TVS on input terminal block, conducting only during >9.4 V transients to divert energy away from optocoupler input stage. Use Value: Maintains <5 µA leakage at 24 V nominal, avoids false triggering, and clamps 1 kV/0.5 Ω ring wave to <16 V within <1 ns. |
| DC Power Rail Surge Suppression | USB/Serial Port ESD Protection |
Use Scenario: Secondary-level protection on 12 V or 24 V DC distribution rails feeding motor drivers, lighting controllers, or communication modules. IC Role / Device Role / Timing Role: Parallel-connected TVS across rail-to-ground, activated only during overvoltage events exceeding VWM, preserving normal regulation. Use Value: Absorbs 1500 W pulses without degradation, sustaining >1000 surges at rated conditions per JEDEC JESD22-A114F. |
Use Scenario: Board-level ESD safeguard for RS-232, RS-485, or USB VBUS lines exposed to human-body-model (HBM) discharges in industrial gateways. IC Role / Device Role / Timing Role: Low-capacitance unidirectional clamp on supply line, suppressing ±15 kV HBM events while adding <0.5 pF parasitic capacitance. Use Value: Prevents data corruption or port IC failure by clamping ESD transients to <16 V before they reach transceiver inputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ11A | Same VBR range (10.5–11.6 V), but lower PPPM = 600 W and SMB package (smaller footprint, higher RθJA = 110 °C/W) | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4; preferred where board space is constrained and surge severity is moderate | Select SMBJ11A only if peak surge current remains <40 A and thermal budget allows higher junction rise |
| 1.5KE11A | Through-hole DO-201 package, identical electrical specs (VBR, VC, PPPM), but incompatible with SMT assembly and larger footprint | Used in legacy or high-reliability through-hole designs; not compatible with automated pick-and-place or compact layouts | Choose 1.5KE11A only for repair, retrofit, or applications requiring mechanical robustness over assembly efficiency |
Compared with SMBJ11A and 1.5KE11A, the 1.5SMC11A-M3/9AT delivers optimal balance of high-power surge handling (1500 W), SMT manufacturability, and halogen-free compliance - making it the preferred choice for new automotive and industrial designs requiring AEC-Q101-aligned reliability without leaded assembly.
Availability
1.5SMC11A-M3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC inputs, and DC power rail surge suppression requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 1.5SMC11A-M3/9AT 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 reliability, power efficiency, and application-specific optimization.
The 1.5SMC Series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where robustness, AEC-Q101 qualification, and consistent clamping performance are critical.
FAQ
What is the clamping voltage of the 1.5SMC11A-M3/9AT under maximum surge conditions?
The 1.5SMC11A-M3/9AT exhibits a maximum clamping voltage (VC) of 15.6 V when subjected to its rated peak pulse current of 96.2 A (10/1000 µs waveform). This value is measured per standard test conditions defined in the Vishay datasheet (Document Number: 88303), and ensures downstream circuitry remains within safe operating limits during high-energy transients.
Is the 1.5SMC11A-M3/9AT AEC-Q101 qualified?
No - the 1.5SMC11A-M3/9AT carries the M3 suffix indicating halogen-free and RoHS-compliance, but not AEC-Q101 qualification. For automotive-grade versions, Vishay offers the 1.5SMC11AHM3_A/I variant (with HM3_A suffix), which is explicitly AEC-Q101 qualified per Note (1) in the ordering table of the same datasheet.
What does the "/9AT" suffix indicate in 1.5SMC11A-M3/9AT?
The "/9AT" suffix denotes packaging: 13-inch diameter plastic tape and reel, with 3500 units per reel. This format supports high-volume automated SMT placement and is distinct from "/57T" (7-inch reel, 850 units). The "9AT" designation is standardized across Vishay's SMC series and confirmed in the Ordering Information table on page 3 of Document 88303.
Can the 1.5SMC11A-M3/9AT be used in bidirectional applications?
No - the 1.5SMC11A-M3/9AT is a unidirectional TVS diode, identifiable by its cathode band marking and specified VBR/VWM parameters for reverse-bias operation only. For bidirectional use, Vishay specifies part numbers ending in "CA" (e.g., 1.5SMC11CA), which provide symmetrical clamping in both polarities.
What is the thermal resistance of the 1.5SMC11A-M3/9AT, and how does it affect PCB layout?
The 1.5SMC11A-M3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, as specified in the Thermal Characteristics table. To maintain safe junction temperatures under repeated surges, PCB layout must allocate adequate copper area and avoid thermal bottlenecks near the SMC (DO-214AB) body.
1.5SMC11A-M3/9AT 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-M3/9AT FAQ
1.How can I place an order for 1.5SMC11A-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC11A-M3/9AT 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-M3/9AT reliable?
The price and inventory of 1.5SMC11A-M3/9AT 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-M3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC11A-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC11A-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC11A-M3/9AT?
1.5SMC11A-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC11A-M3/9AT 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-M3/9AT?
For technical support, including 1.5SMC11A-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC11A-M3/9AT requirements.
6.How does Aetrix verify that 1.5SMC11A-M3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC11A-M3/9AT 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-M3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC11A-M3/9AT?
All 1.5SMC11A-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC11A-M3/9AT, 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-M3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC11A-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC11A-M3/9AT Tags
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