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Vishay General Semiconductor - Diodes Division 1.5SMC9.1A-M3/9AT
- Part No.:
- 1.5SMC9.1A-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC9.1A-M3/9AT.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:9,037
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Product details
Overview
1.5SMC9.1A-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 9.1 V breakdown voltage (VBR = 8.65–9.55 V at IT = 1.0 mA), 7.78 V stand-off voltage (VWM), 13.4 V clamping voltage (VC) at 112 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5SMC9.1A-M3/9AT datasheet, 1.5SMC9.1A-M3/9AT pinout, 1.5SMC9.1A-M3/9AT application, or 1.5SMC9.1A-M3/9AT equivalent, key selection criteria include unidirectional polarity, SMC (DO-214AB) package compatibility, low clamping ratio (VC/VBR ≈ 1.42), <50 µA reverse leakage at VWM, and AEC-Q101 qualification eligibility via M3 suffix.
Technical Context
This TVS operates as a clamping device: under normal bias it presents high impedance (<50 µA leakage at 7.78 V), but triggers avalanche conduction when transient voltage exceeds VBR, limiting downstream voltage to ≤13.4 V at 112 A. Its glass-passivated junction ensures stable breakdown and fast response (<1 ns).
The 1.5SMC9.1A-M3/9AT uses a single PN junction in SMC package with cathode band marking; thermal resistance is RθJA = 75 °C/W and RθJL = 15 °C/W, enabling reliable operation up to TJ = +150 °C. It meets J-STD-020 MSL Level 1 and supports reflow up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 8.65 V / 9.55 V at 1.0 mA - defines precise avalanche initiation threshold for repeatable clamping behavior |
| VWM | 7.78 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 13.4 V at 112 A - clamped voltage during 1500 W transient, determining protected circuit's max stress level |
| IPPM | 112 A - peak surge current capability with 10/1000 µs waveform, defining surge handling capacity |
| PPPM | 1500 W - peak pulse power rating, specifying energy absorption limit per transient event |
| Leakage ID @ VWM | <50 µA - ensures minimal standby power loss and no interference with low-power signal integrity |
| TJ max | +150 °C - maximum junction temperature, supporting operation in under-hood automotive and industrial environments |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads. Dimensions: 7.11 mm × 6.22 mm × 2.62 mm (L × W × H); cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance return in unidirectional clamp configuration |
| Cathode | Avalanche conduction terminal / protected line connection | Connected to line being protected (e.g., 12 V rail or sensor input); band-marked end |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables suppression of high-energy transients (e.g., ISO 7637-2 Pulse 5a) without failure |
| Clamping voltage 13.4 V @ 112 A | Provides margin below typical 15 V IC absolute maximum ratings in 12 V systems |
| Low incremental surge resistance | Minimizes VC rise under high di/dt, improving protection fidelity for fast transients |
| MSL Level 1, 260 °C reflow compatible | Supports standard lead-free SMT assembly without pre-baking or special handling |
| Halogen-free, RoHS-compliant (M3 suffix) | Fulfills environmental compliance requirements for automotive and industrial end equipment |
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 inductive switching spikes in 12 V vehicle subsystems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and ground, clamping transients before they reach sensitive input pins. Use Value: Limits voltage to ≤13.4 V during 112 A surges, preventing latch-up or gate oxide damage in automotive-grade MCUs and transceivers. |
Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers against field-wiring faults and relay coil flyback. IC Role / Device Role / Timing Role: Standoff-rated TVS on input channel, conducting only during >7.78 V overvoltage events while remaining invisible during normal operation. Use Value: Withstands repetitive 1500 W pulses at 0.01 % duty cycle, ensuring long-term reliability in factory automation environments. |
| Consumer Power Adapter Output Clamping | Telecom Line Card Surge Suppression |
Use Scenario: Secondary-side overvoltage protection on 5–12 V DC outputs of wall adapters and USB PD accessories exposed to ESD and capacitive coupling. IC Role / Device Role / Timing Role: Fast-response clamping diode placed after DC-DC converter output filter, shunting transient energy to ground. Use Value: Sub-1 ns response time and 13.4 V clamping prevent downstream LDO or PMIC damage during 8 kV contact ESD events. |
Use Scenario: Primary protection on Ethernet PHY or xDSL line interface cards subjected to lightning-induced surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: First-stage TVS in multi-level protection scheme, absorbing bulk surge energy before gas discharge tube or MOV stages. Use Value: 1500 W rating and low VC/VBR ratio ensure effective coordination with secondary protectors in telecom infrastructure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0A | Lower PPPM (600 W), same VBR range (8.55–9.45 V), SMB package (smaller footprint, higher RθJA) | Less suitable for high-energy automotive load dump; preferred where board space is constrained | Select SMBJ9.0A only if surge energy is limited to ≤600 W and thermal budget allows higher junction temperature rise |
| 1.5KE9.1A | Through-hole TO-204AA (DO-41), identical electrical specs but incompatible mounting and lower MSL rating (not reflow-compatible) | Not viable for automated SMT production; used in legacy or low-volume prototyping | Choose 1.5KE9.1A only for hand-soldered repairs or non-SMT designs where SMC footprint is unavailable |
Compared with SMBJ9.0A and 1.5KE9.1A, the 1.5SMC9.1A-M3/9AT delivers superior surge handling (1500 W vs. 600 W or through-hole-limited thermal performance) and full SMT manufacturability - making it the optimal choice for high-reliability, volume-produced 12 V system protection.
Availability
1.5SMC9.1A-M3/9AT is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC inputs, consumer power adapter outputs, and telecom line card designs requiring stable component supply across extended product lifecycles.
Supply support for 1.5SMC9.1A-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, efficiency, and automotive qualification.
The 1.5SMC Series is engineered for high-power transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness against load dump, ESD, and lightning surges is critical.
FAQ
What is the clamping voltage of the 1.5SMC9.1A-M3/9AT and how is it measured?
The 1.5SMC9.1A-M3/9AT has a maximum clamping voltage (VC) of 13.4 V, measured at its peak pulse current (IPPM) of 112 A using a standardized 10/1000 µs double-exponential transient waveform. This value reflects the actual voltage seen by downstream circuitry during worst-case surge events and is guaranteed per Vishay's datasheet test conditions on 8.0 mm × 8.0 mm copper pads.
Is the 1.5SMC9.1A-M3/9AT suitable for automotive applications?
Yes - the 1.5SMC9.1A-M3/9AT carries the M3 suffix indicating halogen-free, RoHS-compliant construction, and belongs to the AEC-Q101-qualified 1.5SMC family (per datasheet note: "_A is available for 1.5SMC6.8(C)A to 1.5SMC220(C)A, AEC-Q101 qualified"). It is widely deployed in automotive sensor units, body control modules, and infotainment power rails for ISO 7637-2 compliance.
What does the "/9AT" suffix mean in 1.5SMC9.1A-M3/9AT?
The "/9AT" suffix denotes packaging: 13-inch diameter plastic tape and reel, with 3500 units per reel. This format supports high-speed pick-and-place assembly and is distinct from "/57T" (7-inch reel, 850 units). The base part 1.5SMC9.1A-M3 remains electrically and thermally identical across both reel variants.
How does the 1.5SMC9.1A-M3/9AT compare to bidirectional TVS diodes like 1.5SMC9.1CA?
The 1.5SMC9.1A-M3/9AT is unidirectional and intended for DC line protection with defined polarity (cathode to protected line), whereas 1.5SMC9.1CA is bidirectional and suited for AC or differential signal lines. Their VBR, VWM, and VC values differ: 1.5SMC9.1CA has symmetric breakdown (±9.1 V), while 1.5SMC9.1A-M3/9AT operates only in reverse bias above 7.78 V.
What is the maximum operating temperature for the 1.5SMC9.1A-M3/9AT?
The 1.5SMC9.1A-M3/9AT has a specified operating junction temperature range of –65 °C to +150 °C. Its thermal resistance (RθJA = 75 °C/W) means that at 6.5 W steady-state dissipation, junction temperature rises 488 °C above ambient - so it must be used only in transient (non-continuous) power modes, consistent with its 1500 W peak pulse rating and 0.01 % duty cycle limit.
1.5SMC9.1A-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):
- 7.78V
- Voltage - Breakdown (Min):
- 8.65V
- Voltage - Clamping (Max) @ Ipp:
- 13.4V
- Current - Peak Pulse (10/1000µs):
- 112A
- 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)
1.5SMC9.1A-M3/9AT FAQ
1.How can I place an order for 1.5SMC9.1A-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC9.1A-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 1.5SMC9.1A-M3/9AT reliable?
The price and inventory of 1.5SMC9.1A-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 1.5SMC9.1A-M3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC9.1A-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC9.1A-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC9.1A-M3/9AT?
1.5SMC9.1A-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC9.1A-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 1.5SMC9.1A-M3/9AT?
For technical support, including 1.5SMC9.1A-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC9.1A-M3/9AT requirements.
6.How does Aetrix verify that 1.5SMC9.1A-M3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC9.1A-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 1.5SMC9.1A-M3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC9.1A-M3/9AT?
All 1.5SMC9.1A-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC9.1A-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 1.5SMC9.1A-M3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC9.1A-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC9.1A-M3/9AT Tags
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