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Vishay General Semiconductor - Diodes Division 1.5SMC9.1CA-E3/9AT
- Part No.:
- 1.5SMC9.1CA-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC9.1CA-E3/9AT.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:2,337
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Product details
Overview
1.5SMC9.1CA-E3/9AT from Vishay General Semiconductor is a bidirectional 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), clamps to ≤13.4 V at 112 A peak pulse current (IPPM), and delivers 1500 W peak pulse power with 10/1000 µs waveform - deployed in automotive sensor interfaces, industrial I/O protection, and telecom line surge suppression.
For engineers reviewing the 1.5SMC9.1CA-E3/9AT datasheet, 1.5SMC9.1CA-E3/9AT pinout, 1.5SMC9.1CA-E3/9AT application, or 1.5SMC9.1CA-E3/9AT equivalent, this device serves as a RoHS-compliant, AEC-Q101-qualified (via HE3/HM3 variants), low-capacitance TVS optimized for fast transient response (<1 ps), low incremental surge resistance, and MSL Level 1 reflow compatibility up to 260 °C.
Technical Context
The 1.5SMC9.1CA-E3/9AT operates as a bidirectional avalanche diode, symmetrically clamping voltage transients in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<50 µA at VWM), while its SMC (DO-214AB) package provides mechanical robustness and thermal performance (RθJA = 75 °C/W).
It meets UL 497B recognition (QVGQ2) for protector classification and supports repetitive surge duty cycles up to 0.01 % with full derating above TA = 25 °C per Fig. 2. The device is rated for TJ = –65 to +150 °C and withstands 200 A non-repetitive forward surge (8.3 ms half-sine) in unidirectional configurations - though bidirectional operation eliminates cathode/anode distinction.
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 threshold for reliable clamping onset |
| VWM | 7.78 V - maximum continuous reverse operating voltage before leakage exceeds 50 µA |
| VC @ IPPM | ≤13.4 V at 112 A (10/1000 µs) - clamping voltage determines protected circuit's maximum stress during surge |
| PPPM | 1500 W - peak transient power handling capacity under standardized surge waveform |
| IPPM | 112 A - maximum non-repetitive surge current the device safely diverts without failure |
| TJ max. | +150 °C - maximum junction temperature enabling operation in under-hood automotive or high-ambient industrial environments |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal relief and MSL Level 1 rating |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, dimensions 7.75 mm × 6.22 mm × 2.62 mm (L × W × H). Bidirectional configuration has no polarity marking; terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Interchangeable terminal; conducts equally in both directions during transient events |
| Terminal 2 | Cathode / Anode (bidirectional) | Interchangeable terminal; forms symmetrical clamping path across protected line pair |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines without polarity concerns |
| 1500 W peak pulse power | Handles high-energy lightning-induced surges (IEC 61000-4-5 Level 4) on 24 V industrial buses |
| Fast response time (<1 ps) | Clamps transients before sensitive downstream ICs (e.g., CAN transceivers, ADC inputs) experience overstress |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during high-di/dt events, improving protection margin |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without pre-baking or special handling |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting analog output lines (e.g., 4–20 mA current loops) and LIN/CAN bus stubs from load dump and ISO 7637-2 pulses in engine control modules. IC Role / Device Role / Timing Role: Bidirectional TVS placed across signal line and ground to clamp ±100 V transients within nanoseconds. Use Value: Prevents latch-up or gate oxide damage in precision op-amps and microcontroller GPIOs by limiting voltage to ≤13.4 V during 112 A surges. |
Use Scenario: Safeguarding digital input cards against ESD (IEC 61000-4-2) and surge (IEC 61000-4-5) in factory automation cabinets. IC Role / Device Role / Timing Role: Primary front-end suppressor on 24 V DC input channels, mounted directly at connector entry point. Use Value: Maintains system uptime by absorbing 1500 W surges without degradation, validated for >10000 surge events per MIL-STD-883H Method 3015.7. |
| Telecom Line Interface | Consumer Power Adapter Input |
|
Use Scenario: Shielding Ethernet PHY magnetics and PoE injectors from induced lightning surges on outdoor cabling. IC Role / Device Role / Timing Role: Differential-mode TVS across twisted-pair lines (e.g., between tip/ring or data+/data−) to suppress common-mode transients. Use Value: Achieves <13.4 V clamping at 112 A enables compliance with GR-1089-CORE Zone 3 requirements for telecom infrastructure. |
Use Scenario: Secondary-side overvoltage protection on 5 V/9 V/12 V USB-C PD adapter outputs against fault-induced backfeed or regulator failure. IC Role / Device Role / Timing Role: Fast-acting shunt device placed after DC-DC converter output filter to prevent overvoltage damage to connected devices. Use Value: Clamps output to safe levels within 1 ps, protecting USB peripherals' VBUS pins without affecting steady-state regulation accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0CA | Lower PPPM (600 W), same VWM (7.78 V), SMB package (smaller footprint, higher RθJA) | Suitable for space-constrained consumer electronics where 600 W surge margin suffices | Select when board area is critical and surge energy is limited to IEC 61000-4-2 ±8 kV contact discharge only |
| 1.5KE9.1CA | Through-hole TO-204AA (DO-41), identical electrical specs but larger thermal mass and manual assembly requirement | Preferred for prototyping, high-reliability military systems, or legacy through-hole production lines | Choose when automated SMT is unavailable or long-term field replacement logistics favor axial-leaded components |
Compared with SMBJ9.0CA and 1.5KE9.1CA, the 1.5SMC9.1CA-E3/9AT uniquely balances 1500 W surge capability, SMC's optimal thermal performance (RθJL = 15 °C/W), and RoHS-compliant tape-and-reel packaging - making it the preferred choice for high-volume automotive and industrial SMT production requiring AEC-Q101 qualification path.
Availability
1.5SMC9.1CA-E3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, and telecom line surge suppression requiring stable component supply, consistent lot-to-lot parametric performance, and full traceability from Vishay's certified manufacturing sites.
Supply support for 1.5SMC9.1CA-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 passive components with emphasis on reliability, power efficiency, and automotive-grade qualification.
The 1.5SMC Series was engineered specifically for high-power, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where compact size, high surge robustness, and AEC-Q101 compliance are mandatory.
FAQ
What is the breakdown voltage tolerance for 1.5SMC9.1CA-E3/9AT?
The 1.5SMC9.1CA-E3/9AT has a specified breakdown voltage range of 8.65 V to 9.55 V at test current IT = 1.0 mA, representing a ±5 % tolerance about the nominal 9.1 V rating. This tight VBR distribution ensures predictable clamping behavior across production lots and supports design margining for downstream IC absolute maximum ratings.
Is 1.5SMC9.1CA-E3/9AT RoHS-compliant and halogen-free?
Yes, the 1.5SMC9.1CA-E3/9AT carries the "E3" suffix, indicating full RoHS compliance per Directive 2011/65/EU and exemption 7a. It is not halogen-free; for halogen-free and RoHS-compliant versions, specify the "M3" suffix (e.g., 1.5SMC9.1CA-M3/9AT), which meets IEC 61249-2-21 requirements.
Does 1.5SMC9.1CA-E3/9AT meet AEC-Q101 stress testing requirements?
The base 1.5SMC9.1CA-E3/9AT is commercial-grade and not AEC-Q101 qualified. However, the functionally identical 1.5SMC9.1CAHE3_A/9AT variant (with HE3 suffix and revision code) is fully AEC-Q101 qualified for automotive use. Always verify ordering code suffixes when targeting automotive applications.
What is the maximum clamping voltage of 1.5SMC9.1CA-E3/9AT at rated surge current?
The 1.5SMC9.1CA-E3/9AT clamps to a maximum of 13.4 V when subjected to its rated peak pulse current of 112 A (10/1000 µs waveform). This value is guaranteed per datasheet Table "ELECTRICAL CHARACTERISTICS" and defines the upper voltage limit imposed on protected circuits during worst-case surge events.
Can 1.5SMC9.1CA-E3/9AT be used in bidirectional AC signal paths?
Yes - the "CA" suffix explicitly denotes bidirectional construction, meaning 1.5SMC9.1CA-E3/9AT provides symmetrical clamping in both polarities with identical VBR, VWM, and VC characteristics. It is routinely applied across AC-coupled audio lines, RS-485 differential pairs, and transformer-isolated power rails.
1.5SMC9.1CA-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:
- -
- Bidirectional Channels:
- 1
- 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)
1.5SMC9.1CA-E3/9AT FAQ
1.How can I place an order for 1.5SMC9.1CA-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC9.1CA-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 1.5SMC9.1CA-E3/9AT reliable?
The price and inventory of 1.5SMC9.1CA-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 1.5SMC9.1CA-E3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC9.1CA-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC9.1CA-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC9.1CA-E3/9AT?
1.5SMC9.1CA-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC9.1CA-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 1.5SMC9.1CA-E3/9AT?
For technical support, including 1.5SMC9.1CA-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC9.1CA-E3/9AT requirements.
6.How does Aetrix verify that 1.5SMC9.1CA-E3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC9.1CA-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 1.5SMC9.1CA-E3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC9.1CA-E3/9AT?
All 1.5SMC9.1CA-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC9.1CA-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 1.5SMC9.1CA-E3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC9.1CA-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC9.1CA-E3/9AT Tags
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