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Vishay General Semiconductor - Diodes Division 1.5SMC9.1A-E3/9AT
- Part No.:
- 1.5SMC9.1A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC9.1A-E3/9AT.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:4,580
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Product details
Overview
1.5SMC9.1A-E3/9AT 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 capability with a 10/1000 µs waveform - deployed in automotive sensor interfaces, industrial I/O protection, and DC power rail surge suppression.
For engineers reviewing the 1.5SMC9.1A-E3/9AT datasheet, 1.5SMC9.1A-E3/9AT pinout, 1.5SMC9.1A-E3/9AT application, or 1.5SMC9.1A-E3/9AT equivalent, this page delivers verified electrical parameters, SMC (DO-214AB) package details, polarity marking guidance, thermal derating behavior, and direct alternatives for ESD/lighning transient protection in high-reliability embedded systems.
Technical Context
The 1.5SMC9.1A-E3/9AT operates as a unidirectional clamping device: reverse-biased during normal operation (blocking up to 7.78 V), then rapidly avalanching into low-impedance conduction when transients exceed its 8.65–9.55 V breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<50 µA at VWM).
It delivers 1500 W peak pulse power under standardized 10/1000 µs waveform conditions with 0.01% duty cycle, supported by low incremental surge resistance and fast response time (<1.0 ns). Thermal performance is characterized by RθJA = 75 °C/W and RθJL = 15 °C/W, enabling reliable operation up to TJ = +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 8.65 V / 9.55 V at IT = 1.0 mA - defines precise avalanche initiation window for repeatable clamping onset |
| VWM | 7.78 V - maximum continuous reverse operating voltage before leakage exceeds 50 µA |
| VC @ IPPM | 13.4 V at 112 A - clamped voltage seen by protected circuit during worst-case 1500 W transient |
| PPPM | 1500 W - peak surge energy absorption capacity per 10/1000 µs pulse, critical for lightning/inductive spike immunity |
| IPPM | 112 A - maximum non-repetitive surge current the device safely conducts without failure |
| TJ max. | +150 °C - junction temperature limit enabling use in under-hood automotive and industrial environments |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 3.2 mm x 7.75 mm footprint and matte tin-plated leads |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with UL 94 V-0 flammability rating; cathode indicated by band on one end; terminals are matte tin plated and solderable per J-STD-002/JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / reverse voltage reference | Connected to lower-potential side of protected line; defines unidirectional blocking polarity |
| Cathode | Reverse voltage terminal / clamping output | Banded end; connects to higher-potential rail or signal line; sinks surge current to ground path |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables single-device protection against IEC 61000-4-5 Level 4 (4 kV/2 Ω) surges on 12 V/24 V rails |
| Low clamping ratio (VC/VBR ≈ 1.40) | Minimizes voltage overshoot during clamping - critical for safeguarding 5 V/3.3 V logic interfaces |
| MSL Level 1 (260 °C reflow) | Supports standard lead-free PCB assembly without moisture sensitivity concerns or baking requirements |
| RoHS-compliant, commercial grade | E3 suffix confirms compliance with EU RoHS Directive 2011/65/EU and JEDEC JESD201 Class 2 whisker resistance |
| Fast response time (<1 ns) | Clamps transients before sensitive downstream ICs experience damaging overvoltage stress |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and chassis ground to clamp negative-going transients and suppress positive spikes above VWM. Use Value: Maintains signal integrity below 13.4 V during 112 A surges, preventing latch-up or damage to 5 V tolerant transceivers. |
Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers against field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Mounted across input terminals to shunt transient energy away from optocoupler input stages and upstream conditioning circuitry. Use Value: Absorbs 1500 W pulses without degradation, ensuring >100,000 surge cycles in harsh factory environments. |
| DC Power Rail Protection | Consumer USB Port ESD Suppression |
|
Use Scenario: Secondary overvoltage protection on 12 V or 24 V DC power distribution networks feeding motor drivers and microcontrollers. IC Role / Device Role / Timing Role: Parallel-connected TVS referenced to system ground, activated only during overvoltage events exceeding 7.78 V. Use Value: Clamps to 13.4 V within nanoseconds, limiting stress on downstream DC-DC converters rated for ≤16 V absolute maximum. |
Use Scenario: Board-level ESD protection for USB 2.0 data lines and VBUS in set-top boxes, printers, and smart home hubs. IC Role / Device Role / Timing Role: Low-capacitance unidirectional suppressor placed on VBUS line to absorb contact discharge per IEC 61000-4-2 ±15 kV. Use Value: Withstands repeated 15 kV ESD strikes while maintaining <50 µA leakage at 5 V - preserving battery life and signal fidelity. |
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 VWM (7.2 V), slightly lower VC (12.6 V @ 48.2 A) | Rated for lighter-duty consumer-grade surge events; insufficient for IEC 61000-4-5 Level 4 | Select when space-constrained SMB package is required and surge threat level is limited to IEC 61000-4-2/4-4 |
| 1.5KE9.1A | Through-hole TO-204AA (DO-41); identical VBR, VWM, VC, and PPPM; higher RθJA (100 °C/W) | Requires PCB through-hole placement; less suitable for automated SMT lines and high-density layouts | Choose for legacy designs, prototyping, or where manual assembly or thermal mass benefits outweigh SMT efficiency |
Compared with SMBJ9.0A and 1.5KE9.1A, the 1.5SMC9.1A-E3/9AT uniquely combines 1500 W surge capability in an SMC package with MSL Level 1 reflow compatibility - making it optimal for high-volume automotive and industrial SMT production where both robustness and process efficiency are mandatory.
Availability
1.5SMC9.1A-E3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and DC power rail protection requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 1.5SMC9.1A-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, MOSFETs, and protection devices with emphasis on reliability, precision, and application-specific optimization.
The 1.5SMC Series was engineered for high-energy transient suppression in demanding automotive, industrial, and telecom environments - delivering consistent clamping performance, AEC-Q101 qualification options, and SMT-ready packaging for mission-critical electronics.
FAQ
What is the breakdown voltage tolerance for the 1.5SMC9.1A-E3/9AT?
The 1.5SMC9.1A-E3/9AT has a specified breakdown voltage range of 8.65 V to 9.55 V at test current IT = 1.0 mA, corresponding to a ±5% tolerance about the nominal 9.1 V rating. This tight VBR distribution ensures predictable clamping onset across production lots and supports reliable design margining in safety-critical protection circuits.
Is the 1.5SMC9.1A-E3/9AT RoHS-compliant and lead-free?
Yes, the 1.5SMC9.1A-E3/9AT carries the "E3" suffix, indicating full compliance with the EU RoHS Directive 2011/65/EU and use of lead-free matte tin plating on terminals. It meets JESD 201 Class 2 whisker resistance requirements and is qualified for lead-free reflow up to 260 °C (MSL Level 1).
What does the "/9AT" suffix indicate in 1.5SMC9.1A-E3/9AT?
The "/9AT" suffix denotes packaging: 13-inch diameter plastic tape and reel with 3500 units per reel. This format is optimized for high-speed SMT pick-and-place equipment and supports large-volume manufacturing runs without manual handling or packaging conversion.
Can the 1.5SMC9.1A-E3/9AT be used in bidirectional applications?
No - the 1.5SMC9.1A-E3/9AT is a unidirectional TVS diode, identified by its "A" suffix and cathode band marking. For bidirectional protection, Vishay offers the 1.5SMC9.1CA variant (with "CA" suffix), which provides symmetrical clamping in both polarities and no polarity marking.
What is the maximum clamping voltage of the 1.5SMC9.1A-E3/9AT under surge conditions?
The 1.5SMC9.1A-E3/9AT exhibits a maximum clamping voltage VC of 13.4 V when subjected to its rated peak pulse current IPPM = 112 A (10/1000 µs waveform). This value is guaranteed across temperature and ensures protected circuitry remains below critical overvoltage thresholds during transient events.
1.5SMC9.1A-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):
- 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-E3/9AT FAQ
1.How can I place an order for 1.5SMC9.1A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC9.1A-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 1.5SMC9.1A-E3/9AT reliable?
The price and inventory of 1.5SMC9.1A-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 1.5SMC9.1A-E3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC9.1A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC9.1A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC9.1A-E3/9AT?
1.5SMC9.1A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC9.1A-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 1.5SMC9.1A-E3/9AT?
For technical support, including 1.5SMC9.1A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC9.1A-E3/9AT requirements.
6.How does Aetrix verify that 1.5SMC9.1A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC9.1A-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 1.5SMC9.1A-E3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC9.1A-E3/9AT?
All 1.5SMC9.1A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC9.1A-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 1.5SMC9.1A-E3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC9.1A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC9.1A-E3/9AT Tags
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Diodes Incorporated
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