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Taiwan Semiconductor Corporation 1.5SMC9.1C
- Part No.:
- 1.5SMC9.1C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC9.1C.pdf
- Description:
- 1500W, 9.1V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:2,413
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Product details
Overview
1.5SMC9.1C from Taiwan Semiconductor is a unidirectional 1500W surface-mount transient voltage suppressor (TVS) in DO-214AB (SMC) package, with breakdown voltage 8.19–10.0 V at 1.0 mA test current, working stand-off voltage 7.37 V, and clamping voltage 13.8 V at 12 A peak impulse current. It protects power rails and I/O lines in telecom front-ends against ESD and lightning-induced transients.
For engineers reviewing the 1.5SMC9.1C datasheet, 1.5SMC9.1C pinout, 1.5SMC9.1C application, or 1.5SMC9.1C equivalent, this page delivers verified electrical specs, thermal performance, bidirectional configuration details, and real-world protection use cases for industrial and automotive interface circuits.
Technical Context
The 1.5SMC9.1C uses a glass-passivated silicon junction to achieve fast response time (<1.0 ps) and low leakage (<1 µA at 7.37 V). Its unidirectional architecture provides asymmetric conduction-low forward voltage (~3.5 V at 50 A) and high reverse blocking capability up to 7.37 V.
Designed per ISO 7637-2 Pulse 1/2a/2b/3a/3b, it sustains 1500 W peak pulse power (10/1000 µs waveform), with junction temperature range –55 °C to +150 °C and thermal resistance RθJA = 50 °C/W. The C suffix confirms bidirectional functionality per manufacturer's ordering convention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500 W - withstands automotive load-dump and lightning surge events per ISO 7637-2 |
| Breakdown Voltage VBR | 8.19–10.0 V @ 1.0 mA - defines precise reverse conduction onset for reliable overvoltage triggering |
| Working Stand-off Voltage VWM | 7.37 V - maximum continuous reverse voltage before leakage exceeds 1 µA |
| Clamping Voltage VC | 13.8 V @ 12 A - limits downstream circuit voltage during 10/1000 µs transient |
| Junction Temperature Range | –55 °C to +150 °C - supports operation in under-hood automotive and industrial ambient conditions |
| Thermal Resistance RθJA | 50 °C/W - enables 6.5 W steady-state dissipation on standard 1-in² copper pad |
| Response Time | <1.0 ps - ensures suppression before sensitive logic or analog circuitry is damaged |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, polarity indicated by cathode band. Weight: 0.210 g. Meets UL 94V-0 and JESD201 Class 2 whisker requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connects to lower-potential side of protected line; conducts during positive surges when used unidirectionally |
| Cathode | Reverse-blocking / clamping terminal | Connects to higher-potential rail; initiates avalanche clamping above VWM in bidirectional mode |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional TVS configuration | Enables symmetric surge suppression on AC-coupled or floating signal lines without polarity constraints |
| ISO 7637-2 compliance | Validated for automotive electronics immunity to load dump, alternator transients, and coupled noise pulses |
| Glass passivated junction | Ensures stable VBR tolerance (±5% typical) and long-term reliability under thermal cycling |
| Moisture sensitivity level 1 | Allows unlimited floor life before reflow; no baking required prior to assembly |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU directives for environmentally constrained production environments |
Applications
| Automotive Infotainment Display Interface | Industrial RS-485 Communication Port |
|---|---|
Use Scenario: Protecting LVDS or FPD-Link III video data lines between head unit and TFT display against battery transients and ESD. IC Role / Device Role / Timing Role: Bidirectional clamping device placed across differential pairs to limit common-mode overvoltage without distorting signal integrity. Use Value: Clamps 12 A transients to ≤13.8 V while maintaining <1 µA leakage at 7.37 V, preserving DC bias and minimizing insertion loss. |
Use Scenario: Safeguarding RS-485 transceivers (e.g., THVD1550) connected to long cable runs in factory automation systems. IC Role / Device Role / Timing Role: Primary surge protection element on A/B bus lines, absorbing induced lightning energy before it reaches the transceiver ESD diodes. Use Value: Delivers 1500 W peak power handling with 13.8 V clamping to keep transceiver stress below absolute maximum ratings during 10/1000 µs surges. |
| Telecom DSL Line Card Protection | Smart Meter AC Mains Interface |
Use Scenario: Shielding ADSL/VDSL line drivers and hybrid couplers from tip-ring surges and induced lightning on outside plant wiring. IC Role / Device Role / Timing Role: First-stage protector on POTS splitter outputs, operating in parallel with GDTs to handle fast-rising transients. Use Value: Sub-nanosecond response captures rising edge of 1.2/50 µs surges before secondary protectors activate, reducing let-through voltage by >30%. |
Use Scenario: Protecting metering IC inputs and microcontroller GPIOs tied to optocoupler-isolated zero-cross detection circuits. IC Role / Device Role / Timing Role: Secondary clamp after MOV-based primary protection, suppressing residual high-frequency ringing and ESD. Use Value: 7.37 V VWM aligns with 5 V logic supply rails; 13.8 V VC ensures MCU I/O remains within safe 15 V absolute max rating. |
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 | 600 W rating, DO-214AA (SMB) package, VC = 14.4 V @ 8.3 A | Limited to lower-energy surges; unsuitable for ISO 7637-2 Pulse 5a (load dump) | Select when board space is constrained and peak power demand ≤600 W |
| 1.5KE9.1C | Through-hole TO-218 package, same 1500 W rating, VC = 13.4 V @ 12.2 A | Requires wave soldering or hand assembly; incompatible with fully SMT production | Choose for legacy designs or where mechanical robustness outweighs assembly efficiency |
Compared with SMBJ9.0CA and 1.5KE9.1C, the 1.5SMC9.1C uniquely balances 1500 W surge capacity, SMT manufacturability, and bidirectional symmetry in the compact DO-214AB footprint-making it optimal for high-volume automotive and industrial PCBs requiring automated placement and IPC Class 3 reliability.
Availability
1.5SMC9.1C is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial RS-485 networks, and smart metering platforms requiring stable component supply and full ISO 7637-2 compliance.
Supply support for 1.5SMC9.1C 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, and rectifiers with global AEC-Q101 qualification capabilities.
The 1.5SMCxxC series targets high-reliability transient suppression in automotive and industrial environments, emphasizing robust surge handling, tight parametric control, and RoHS/halogen-free compliance for modern manufacturing.
FAQ
What does the 'C' suffix mean in 1.5SMC9.1C?
The 'C' suffix in 1.5SMC9.1C indicates a bidirectional configuration, meaning the device functions identically in both polarities-unlike unidirectional variants (e.g., 1.5SMC9.1). This allows symmetric clamping on AC signals or floating buses without regard to polarity, and is confirmed in TSC's ordering documentation for the 1.5SMC6.8–1.5SMC200A family.
What is the maximum clamping voltage of 1.5SMC9.1C under standard test conditions?
The maximum clamping voltage of 1.5SMC9.1C is 13.8 V at 12 A peak impulse current (10/1000 µs waveform), as specified in TSC's Electrical Specifications table. This value ensures protected circuits remain within safe operating limits during standardized surge events defined by IEC 61000-4-5 and ISO 7637-2.
Can 1.5SMC9.1C replace 1.5SMC9.1 in an existing design?
Yes-1.5SMC9.1C is electrically and physically identical to 1.5SMC9.1 except for bidirectional functionality. Both share the same DO-214AB package, thermal characteristics, and key parameters (VBR, VWM, VC). The 1.5SMC9.1C adds reverse-direction clamping capability, making it a functional superset suitable for direct substitution where bidirectional protection is beneficial.
Does 1.5SMC9.1C meet automotive qualification standards?
Yes, 1.5SMC9.1C meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements for transient immunity in automotive applications. While not explicitly AEC-Q101 certified in this datasheet revision, its construction (glass-passivated junction, MSL Level 1, –55 °C to +150 °C operation) aligns with AEC-Q101 stress test profiles and is widely deployed in automotive ECUs and infotainment modules.
What is the leakage current specification for 1.5SMC9.1C at its working stand-off voltage?
At its working stand-off voltage of 7.37 V, the 1.5SMC9.1C exhibits a maximum blocking leakage current (IR) of 1 µA, measured at TA = 25 °C. This low leakage ensures minimal power loss in always-on circuits and avoids false triggering in high-impedance sensing nodes.
1.5SMC9.1C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 7.37V
- Voltage - Breakdown (Min):
- 8.19V
- Voltage - Clamping (Max) @ Ipp:
- 13.8V
- Current - Peak Pulse (10/1000µs):
- 114A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC9.1C FAQ
1.How can I place an order for 1.5SMC9.1C through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC9.1C 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 1.5SMC9.1C reliable?
The price and inventory of 1.5SMC9.1C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC9.1C is usually 5 days.
3.What payment methods are accepted for 1.5SMC9.1C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC9.1C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC9.1C?
1.5SMC9.1C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC9.1C 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 1.5SMC9.1C?
For technical support, including 1.5SMC9.1C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC9.1C requirements.
6.How does Aetrix verify that 1.5SMC9.1C is sourced from the original manufacturer or authorized distributors?
All 1.5SMC9.1C 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 1.5SMC9.1C meets industry standards.
7.What is the process for return or replacement of 1.5SMC9.1C?
All 1.5SMC9.1C units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC9.1C, 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 1.5SMC9.1C part is unused and in its original packaging.
Return procedure for 1.5SMC9.1C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC9.1C Tags
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