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Taiwan Semiconductor Corporation 1.5SMC68C
- Part No.:
- 1.5SMC68C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC68C.pdf
- Description:
- 1500W, 68V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:4,314
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Product details
Overview
1.5SMC68C from Taiwan Semiconductor is a unidirectional 1500W surface-mount transient voltage suppressor (TVS) diode with a nominal breakdown voltage of 68 V, clamping voltage of 98 V at 16 A peak pulse current, and working stand-off voltage of 55.1 V. It features glass-passivated junction, <1 ps response time, and meets ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive load-dump and ESD protection in DC power rails.
For engineers reviewing the 1.5SMC68C datasheet, 1.5SMC68C pinout, 1.5SMC68C application, or 1.5SMC68C equivalent, key selection criteria include clamping performance under 10/1000 µs surge, thermal resistance (RθJC = 15 °C/W), leakage current (<1 µA @ 55.1 V), and DO-214AB (SMC) package compatibility with automated SMT assembly.
Technical Context
The 1.5SMC68C operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its 61.2–74.8 V breakdown range (VBR @ 1 mA). Its fast <1 ps response enables suppression of ESD events per IEC 61000-4-2 and lightning-induced transients per IEC 61000-4-5.
Thermal design relies on low junction-to-case resistance (15 °C/W) and maximum junction temperature of +150 °C. The device sustains 1500 W peak pulse power (1 ms, 10/1000 µs waveform) with derating above 25 °C ambient, and exhibits 0.104 %/°C temperature coefficient of VBR.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 61.2 V / 74.8 V - Ensures reliable turn-on above 55.1 V operating rail while avoiding false triggering |
| VC @ IPPM | 98 V @ 16 A - Limits downstream voltage to safe level during 10/1000 µs surge, protecting 100 V-rated ICs |
| PPK | 1500 W - Handles high-energy transients such as ISO 7637-2 Pulse 5a (load dump) in automotive 12 V systems |
| IR @ VWM | <1 µA @ 55.1 V - Minimizes standby power loss and avoids interference in high-impedance sensing circuits |
| TJ max | +150 °C - Supports operation in under-hood automotive environments and industrial enclosures without forced cooling |
| RθJC | 15 °C/W - Enables effective heat transfer to PCB copper pour or heatsink, critical for repeated surge duty cycles |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, single-diode configuration with cathode band marking. Matte tin-plated leads comply with J-STD-002 solderability and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side (for unidirectional configuration) | Connected to protected line (e.g., 12 V supply); conducts only during forward-biased surges or fault conditions |
| Cathode | Clamp/Return side | Connected to ground or lower-potential rail; provides low-impedance path to shunt transient energy during reverse overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR and long-term reliability under humidity and thermal cycling (J-STD-020 MSL Level 1) |
| <1 ps response time | Suppresses ESD events before sensitive logic or analog circuitry experiences overstress (IEC 61000-4-2 compliant) |
| ISO 7637-2 compliance | Validated for automotive 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 UL 94V-0 flammability requirements for industrial and consumer end-equipment |
Applications
| Automotive Power Rail Protection | Industrial DC Input Stage |
|---|---|
|
Use Scenario: 12 V battery-fed ECUs exposed to load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and primary DC/DC converter input. Use Value: Clamps transients to ≤98 V, preventing damage to 100 V-rated input MOSFETs and enabling robust startup after cold cranking. |
Use Scenario: 24 V PLC I/O module input subjected to inductive kickback from solenoid drivers. IC Role / Device Role / Timing Role: Standoff protector on field-side power entry, upstream of EMI filter and regulator. Use Value: Absorbs 1500 W surges without degradation, maintaining <1 µA leakage to preserve low-power sleep mode integrity. |
| Telecom Line Interface | Consumer USB Power Delivery |
|
Use Scenario: PoE-powered network switch port with Ethernet PHY and auxiliary 48 V DC bias. IC Role / Device Role / Timing Role: Secondary-level clamp on 48 V auxiliary rail, downstream of primary surge protection. Use Value: Provides precise 55.1 V stand-off to avoid interference with 48 V regulation while clamping lightning-induced surges to 98 V. |
Use Scenario: USB-C PD sink with 20 V input stage vulnerable to hot-plug transients and ESD. IC Role / Device Role / Timing Role: Fast-response TVS on VBUS line, adjacent to USB controller and load switch. Use Value: Sub-nanosecond response prevents latch-up in USB PD controllers during ±15 kV contact ESD (IEC 61000-4-2). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ68A | Lower peak power (600 W), same DO-214AA (SMB) package, VC = 110 V @ 5.5 A | Not suitable for ISO 7637-2 Pulse 5a; limited to lower-energy transients in consumer-grade 12 V systems | Select SMBJ68A only when surge energy is constrained to ≤600 W and board space requires smaller SMB footprint. |
| 1.5KE68C | Through-hole TO-218 package, identical 1500 W rating and VBR/VC, but no automated placement support | Requires wave soldering or hand assembly; unsuitable for high-volume SMT production lines | Choose 1.5KE68C only for prototyping, legacy through-hole designs, or where thermal mass of lead-frame improves sustained surge handling. |
Compared with SMBJ68A and 1.5KE68C, the 1.5SMC68C uniquely delivers 1500 W SMT-compatible protection in DO-214AB with sub-1 ps response-critical for automotive and industrial applications demanding both high energy absorption and zero-layout rework.
Availability
1.5SMC68C is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, telecom power interfaces, and USB-C PD systems requiring stable component supply across extended temperature ranges and high-reliability surge immunity.
Supply support for 1.5SMC68C 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, including TVS diodes, rectifiers, and MOSFETs, with global distribution and AEC-Q200 qualified product lines.
The 1.5SMC series was designed specifically for high-energy, surface-mount transient suppression in automotive and industrial environments-emphasizing ISO 7637-2 compliance, MSL Level 1 reliability, and automated assembly readiness.
FAQ
What is the polarity configuration of the 1.5SMC68C?
The 1.5SMC68C is a unidirectional TVS diode, with cathode marked by a band on the DO-214AB package. It conducts only during reverse overvoltage events, making it ideal for DC power rail protection where polarity is fixed. Unlike bidirectional variants (e.g., 1.5SMC68CA), it does not conduct in forward bias beyond typical diode drop.
Does the 1.5SMC68C meet automotive transient standards?
Yes, the 1.5SMC68C is explicitly validated to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test profiles. Its 1500 W peak power rating and 98 V clamping voltage enable robust protection against load dump, battery disconnect, and coupled line transients in 12 V automotive systems.
What is the maximum allowable junction temperature for continuous operation of the 1.5SMC68C?
The 1.5SMC68C has a maximum junction temperature (TJ) of +150 °C, with derating applied above 25 °C ambient per Figure 2 in the datasheet. For sustained operation at elevated temperatures, thermal design must ensure RθJA ≤ 50 °C/W using adequate PCB copper area or external heatsinking.
How does the 1.5SMC68C differ from the 1.5SMC68A variant?
The 1.5SMC68C has a breakdown voltage range of 61.2–74.8 V and clamps at 98 V, whereas the 1.5SMC68A offers tighter VBR (64.6–71.4 V) and lower clamping voltage (92 V). The "C" suffix denotes standard tolerance; "A" indicates enhanced VBR tolerance and improved clamping consistency for precision-sensitive applications.
Is the 1.5SMC68C compatible with lead-free reflow soldering processes?
Yes, the 1.5SMC68C uses matte tin-plated leads compliant with J-STD-002 and supports standard lead-free reflow profiles (peak ≤260 °C). Its MSL Level 1 rating per J-STD-020 means it can be stored indefinitely at ≤30 °C/60% RH without baking prior to assembly.
1.5SMC68C 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):
- 55.1V
- Voltage - Breakdown (Min):
- 61.2V
- Voltage - Clamping (Max) @ Ipp:
- 98V
- Current - Peak Pulse (10/1000µs):
- 16A
- 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)
1.5SMC68C FAQ
1.How can I place an order for 1.5SMC68C through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC68C 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 1.5SMC68C reliable?
The price and inventory of 1.5SMC68C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC68C is usually 5 days.
3.What payment methods are accepted for 1.5SMC68C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC68C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC68C?
1.5SMC68C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC68C 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 1.5SMC68C?
For technical support, including 1.5SMC68C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC68C requirements.
6.How does Aetrix verify that 1.5SMC68C is sourced from the original manufacturer or authorized distributors?
All 1.5SMC68C 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 1.5SMC68C meets industry standards.
7.What is the process for return or replacement of 1.5SMC68C?
All 1.5SMC68C units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC68C, 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 1.5SMC68C part is unused and in its original packaging.
Return procedure for 1.5SMC68C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC68C Tags
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