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Taiwan Semiconductor Corporation 1.5SMC12C
- Part No.:
- 1.5SMC12C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC12C.pdf
- Description:
- 1500W, 12V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:2,395
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Product details
Overview
1.5SMC12C from Taiwan Semiconductor is a unidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 12V breakdown voltage (VBR = 11.4–12.6 V @ 1.0 mA), 10.2 V working stand-off voltage (VWM), 16.7 V maximum clamping voltage (VC @ IPPM), and <1.0 ps response time - deployed for ESD and surge protection on DC power rails in telecom front-ends.
For engineers reviewing the 1.5SMC12C datasheet, 1.5SMC12C pinout, 1.5SMC12C application, or 1.5SMC12C equivalent, key selection criteria include clamping performance at 94 A peak impulse current, unidirectional polarity marking, JEDEC-compliant thermal resistance (RθJA = 50 °C/W), and compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive load-dump immunity.
Technical Context
The 1.5SMC12C employs a glass-passivated silicon junction optimized for fast transient suppression with sub-nanosecond response. Its unidirectional configuration provides asymmetric conduction: low forward voltage (~3.5 V @ 50 A) during surge events and <1 µA leakage above 10.2 V under normal operation.
Designed for surface-mount assembly per J-STD-020 Level 1 moisture sensitivity, it delivers 1500 W peak pulse power (tp = 1 ms) with derating above 25 °C ambient, and meets UL 94V-0 flammability and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 11.4 V / 12.6 V @ 1.0 mA - ensures reliable turn-on before system overvoltage damage occurs |
| VWM | 10.2 V - maximum continuous reverse voltage without significant leakage |
| VC @ IPPM | 16.7 V @ 94 A - clamping voltage limiting downstream IC stress during 10/1000 µs surge |
| PPK | 1500 W - peak surge energy handling capability per single 1 ms pulse |
| IR @ VWM | <1 µA - negligible standby power loss and signal integrity impact |
| TJ max | +150 °C - supports operation in high-temperature industrial enclosures |
| RθJA | 50 °C/W - enables thermal design with standard PCB copper area (no heatsink required) |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, molded plastic case with matte tin-plated leads; cathode indicated by band marking; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or return path; defines clamping reference for positive transients |
| Cathode | Protected line input | Connected to DC rail (e.g., +12 V); absorbs surge energy when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Clamping speed | <1.0 ps response - limits voltage overshoot during ESD events (IEC 61000-4-2) |
| Glass passivation | Stable junction characteristics over temperature and humidity cycling |
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnect), and Pulse 3a/3b (line transients) |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing |
| Automated placement ready | DO-214AB footprint compatible with standard SMT pick-and-place equipment |
Applications
| Telecom Power Input Protection | Industrial PLC I/O Module |
|---|---|
Use Scenario: Protecting 12 V DC input of VoIP gateways against lightning-induced surges on outdoor lines. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground to clamp transients before they reach DC-DC converters. Use Value: Limits clamped voltage to 16.7 V, preventing damage to 24 V-tolerant regulators while surviving 94 A 10/1000 µs pulses. |
Use Scenario: Safeguarding analog input channels of programmable logic controllers exposed to inductive kickback from solenoid drivers. IC Role / Device Role / Timing Role: Standoff protection on 12 V sensor supply rail, triggered only during >11.4 V transients. Use Value: Sub-1 µA leakage avoids measurement drift; 1500 W rating handles repetitive 8.3 ms half-sine surges up to 200 A IFSM. |
| Automotive Body Control Module | Consumer Audio Power Supply |
Use Scenario: Load-dump protection on 12 V battery-fed microcontroller power domains in BCMs. IC Role / Device Role / Timing Role: Primary clamping device across VCC-GND, activated within picoseconds of ISO 7637-2 Pulse 5a (load dump). Use Value: Clamps to 16.7 V at 94 A, keeping MCU VCC within safe operating range despite 35 V/100 ms transients. |
Use Scenario: ESD hardening of 12 V DC adapter input in powered speakers subjected to user-handling discharge. IC Role / Device Role / Timing Role: First-line defense against contact ESD (±8 kV HBM) on external power connector. Use Value: 1.0 ps response prevents voltage overshoot beyond 16.7 V, protecting downstream LDOs rated for 20 V absolute max. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12A | 600 W rating, DO-214AA (SMB) package, VC = 19.9 V @ 30 A | Lower power handling; suitable for lower-energy transients or space-constrained layouts | Select when board area is limited and peak surge current ≤30 A |
| 1.5KE12C | Through-hole TO-204AE (DO-41), same 1500 W rating but slower thermal response (RθJA ≈ 60 °C/W) | Requires wave soldering; less suited for high-density automated assembly | Select only for legacy through-hole designs or prototyping with manual assembly |
Compared with SMBJ12A and 1.5KE12C, the 1.5SMC12C offers superior power density (1500 W in SMC), tighter clamping (16.7 V vs. 19.9 V), and SMT compatibility - making it optimal for production-grade 12 V rail protection where surge robustness and assembly efficiency are critical.
Availability
1.5SMC12C is available at Aetrix Electronics and suitable for telecom infrastructure, industrial control systems, and automotive body electronics requiring stable component supply and full ISO 7637-2 compliance.
Supply support for 1.5SMC12C 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, rectifiers, and MOSFETs for industrial and automotive markets.
The 1.5SMC series was developed to deliver high-power, surface-mount surge protection with stringent automotive-grade reliability - targeting replacement of older through-hole TVS families in next-generation ECU and power module designs.
FAQ
What is the polarity configuration of the 1.5SMC12C?
The 1.5SMC12C is a unidirectional TVS diode, meaning it conducts only in reverse bias above its breakdown voltage. The cathode is marked by a band on the DO-214AB package and must be connected to the protected line (e.g., +12 V), while the anode connects to ground. This configuration blocks forward current except during surge events, ensuring minimal interference with normal circuit operation.
Does the 1.5SMC12C meet automotive transient immunity standards?
Yes, the 1.5SMC12C meets ISO 7637-2 requirements for Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnection), and Pulse 3a/3b (capacitive coupling), verified per manufacturer test data. Its 1500 W peak power rating and 16.7 V clamping voltage enable robust protection against load-dump and alternator-switching transients in 12 V automotive systems.
What is the maximum clamping voltage of the 1.5SMC12C under surge conditions?
The maximum clamping voltage of the 1.5SMC12C is 16.7 V at 94 A peak impulse current (IPPM) with a 10/1000 µs waveform. This value is guaranteed across temperature and process variation, and defines the upper voltage limit imposed on protected circuitry during worst-case surge events - critical for ensuring downstream ICs remain within their absolute maximum ratings.
Can the 1.5SMC12C be used in bidirectional applications?
No - the 1.5SMC12C is unidirectional only. For bidirectional protection (e.g., AC signal lines or differential buses), Taiwan Semiconductor specifies the 1.5SMC12CA variant, which features symmetrical breakdown in both directions. Using the 1.5SMC12C in reverse-biased signal paths risks forward conduction and unintended current flow.
What is the thermal resistance and how does it affect PCB layout for the 1.5SMC12C?
The 1.5SMC12C has a junction-to-ambient thermal resistance (RθJA) of 50 °C/W. This means that with 1.5 W steady-state dissipation (e.g., from leakage or minor ripple), temperature rise is ~75 °C - well within its 150 °C max junction rating. To maintain this, use ≥1 cm² of 1 oz copper connected to both terminals; no thermal vias or heatsinks are required for typical surge duty cycles.
1.5SMC12C 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):
- 9.72V
- Voltage - Breakdown (Min):
- 10.8V
- Voltage - Clamping (Max) @ Ipp:
- 17.3V
- Current - Peak Pulse (10/1000µs):
- 91A
- 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)
1.5SMC12C FAQ
1.How can I place an order for 1.5SMC12C through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC12C 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 1.5SMC12C reliable?
The price and inventory of 1.5SMC12C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC12C is usually 5 days.
3.What payment methods are accepted for 1.5SMC12C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC12C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC12C?
1.5SMC12C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC12C 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 1.5SMC12C?
For technical support, including 1.5SMC12C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC12C requirements.
6.How does Aetrix verify that 1.5SMC12C is sourced from the original manufacturer or authorized distributors?
All 1.5SMC12C 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 1.5SMC12C meets industry standards.
7.What is the process for return or replacement of 1.5SMC12C?
All 1.5SMC12C units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC12C, 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 1.5SMC12C part is unused and in its original packaging.
Return procedure for 1.5SMC12C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC12C Tags
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