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Taiwan Semiconductor Corporation 1.5SMC20C
- Part No.:
- 1.5SMC20C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC20C.pdf
- Description:
- 1500W, 20V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:7,564
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Product details
Overview
1.5SMC20C from Taiwan Semiconductor is a unidirectional 1500W surface-mount transient voltage suppressor (TVS) diode with a 20V working stand-off voltage (VWM = 16.2 V), 22 V minimum breakdown voltage (VBR), and 29.1 V maximum clamping voltage (VC) at 54 A peak pulse current. It protects power rails and I/O lines in telecom interfaces, industrial controllers, and automotive ECUs against ESD, lightning surges, and load-switch transients.
For engineers reviewing the 1.5SMC20C datasheet, 1.5SMC20C pinout, 1.5SMC20C application, or 1.5SMC20C equivalent, key selection criteria include clamping performance under 10/1000 µs surge, unidirectional polarity marking, DO-214AB package thermal resistance (RθJA = 50 °C/W), and compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b.
Technical Context
The 1.5SMC20C uses a glass-passivated silicon junction optimized for fast transient response (<1.0 ps), low leakage (<1 µA at 16.2 V), and stable clamping across -55°C to +150°C junction temperature. Its unidirectional configuration provides asymmetric protection with cathode-band polarity identification.
Designed for automated SMT placement, it meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements. The DO-214AB (SMC) package supports 200 A non-repetitive forward surge current (IFSM) and delivers 6.5 W steady-state power dissipation at 25°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 16.2 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 18.0 / 22.0 V @ 1.0 mA - Confirmed breakdown threshold range for reliable turn-on margin |
| VC @ IPPM | 29.1 V @ 54 A - Clamped voltage during 10/1000 µs surge, limiting downstream stress |
| PPK | 1500 W - Peak pulse power handling per single transient event |
| IR @ VWM | <1 µA - Minimal leakage ensures negligible standby power loss in high-impedance circuits |
| RθJA | 50 °C/W - Thermal resistance from junction to ambient, critical for PCB copper pour design |
| TJ max | +150 °C - Maximum allowable junction temperature for sustained operation |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, cathode band marked on one end for unidirectional polarity identification. Weight: 0.210 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., GND or return path) in unidirectional TVS configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 24 V rail or CAN_H); clamps to anode when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Fast response time | <1.0 ps - Enables suppression of nanosecond-scale ESD events before sensitive ICs are damaged |
| Glass passivation | Stable junction reliability over temperature and humidity, supporting industrial-grade lifetime requirements |
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupling) |
| Moisture sensitivity level | MSL Level 1 - No floor life limitation; safe for standard reflow without dry-packaging |
| Halogen-free construction | Complies with IEC 61249-2-21 - Supports RoHS-compliant and environmentally regulated product designs |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of 24 V DC input rails against inductive kickback from solenoid valves and relay coils. IC Role / Device Role / Timing Role: Unidirectional TVS placed between rail and chassis ground to clamp negative transients below -30 V. Use Value: Limits voltage excursion to ≤29.1 V at 54 A, preventing damage to upstream DC-DC converters and microcontrollers. | Use Scenario: Surge suppression on LIN bus lines exposed to battery disconnect transients and alternator load dumps. IC Role / Device Role / Timing Role: Standoff-rated TVS (VWM = 16.2 V) placed inline with LIN transceiver inputs to absorb ISO 7637-2 Pulse 2a. Use Value: Clamps transients within 1 ps, maintaining signal integrity while meeting automotive EMC immunity requirements. |
| Telecom Power Feeds | Consumer USB-C PD Adapters |
Use Scenario: Input-stage protection for PoE-powered equipment receiving up to 57 V DC over twisted pair. IC Role / Device Role / Timing Role: Primary rail protector on secondary-side 24–48 V distribution, oriented anode-to-ground. Use Value: Withstands 1500 W pulses and maintains <1 µA leakage at 16.2 V, minimizing standby power loss in always-on systems. | Use Scenario: Overvoltage safeguard on 20 V USB-C PD output rails during adapter fault conditions. IC Role / Device Role / Timing Role: Secondary-side clamping device between VBUS and GND, triggered only above 22 V breakdown. Use Value: Delivers 29.1 V clamping at 54 A, ensuring downstream USB-C controller ICs remain within absolute maximum ratings during fault events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20A (Bourns) | Same DO-214AA package; 20 V VWM, but bidirectional configuration (CA suffix required for unidirectional) | Requires polarity-aware layout; lacks explicit ISO 7637-2 Pulse 2b validation in public datasheet | Select if DO-214AA footprint compatibility is prioritized over ISO-certified test evidence |
| P6SMB20A (ON Semiconductor) | DO-214AA package; identical VWM/VBR/VC specs but higher RθJA (60 °C/W) and no published MSL Level 1 rating | May require larger thermal pad for same power derating; not qualified for moisture-sensitive automated assembly | Choose when legacy P6SMB footprint reuse is mandatory and humidity-controlled handling is available |
Compared with SMBJ20A and P6SMB20A, the 1.5SMC20C offers verified ISO 7637-2 compliance, MSL Level 1 handling, and lower thermal resistance (50 °C/W), making it preferable for automotive and high-volume industrial SMT production where reliability and process robustness are critical.
Availability
1.5SMC20C is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power feeds requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 1.5SMC20C 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, MOSFETs, and power management devices.
The 1.5SMC series was developed specifically for high-energy transient suppression in automotive, industrial, and telecom infrastructure applications-emphasizing rugged packaging, ISO-standard validation, and automated assembly readiness.
FAQ
What is the polarity configuration of the 1.5SMC20C?
The 1.5SMC20C is a unidirectional TVS diode with cathode-band marking indicating the clamping terminal. When reverse-biased (cathode positive), it breaks down at 18.0–22.0 V and clamps transients to ≤29.1 V. This configuration is used for DC rail protection where polarity is fixed, unlike bidirectional variants that suppress both polarities.
Does the 1.5SMC20C meet automotive transient immunity standards?
Yes, the 1.5SMC20C meets ISO 7637-2 requirements for Pulse 1 (inductive switch-off), Pulse 2a/2b (supply line transients), and Pulse 3a/3b (capacitive coupling). Its 1500 W peak power rating and 29.1 V clamping voltage at 54 A ensure robust protection for 12 V/24 V automotive subsystems, including body control modules and infotainment power inputs.
What is the maximum junction temperature rating for the 1.5SMC20C?
The 1.5SMC20C has a maximum junction temperature (TJ max) of +150°C, validated across its full operating range from –55°C to +150°C. This rating enables use in under-hood automotive environments and enclosed industrial enclosures where ambient temperatures exceed 100°C, provided PCB thermal design achieves the specified RθJA of 50 °C/W.
How does the 1.5SMC20C compare to the 1.5SMC20A variant?
The 1.5SMC20C has a tighter breakdown voltage tolerance (18.0–22.0 V) versus the 1.5SMC20A (19.0–21.0 V), resulting in earlier clamping onset but slightly higher VC (29.1 V vs. 27.7 V). Both share identical DO-214AB packaging, 1500 W PPK, and ISO 7637-2 compliance; the "C" suffix denotes standard tolerance, while "A" indicates enhanced VBR uniformity for precision applications.
Is the 1.5SMC20C suitable for automated SMT assembly?
Yes, the 1.5SMC20C is explicitly designed for automated placement: it features matte tin-plated leads compliant with J-STD-002 solderability, MSL Level 1 moisture sensitivity (no bake required), and DO-214AB (SMC) geometry optimized for pick-and-place accuracy. Its 0.210 g weight and symmetric lead profile further enhance placement yield in high-speed SMT lines.
1.5SMC20C 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):
- 16.2V
- Voltage - Breakdown (Min):
- 18V
- Voltage - Clamping (Max) @ Ipp:
- 29.1V
- Current - Peak Pulse (10/1000µs):
- 54A
- 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)
1.5SMC20C FAQ
1.How can I place an order for 1.5SMC20C through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC20C 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 1.5SMC20C reliable?
The price and inventory of 1.5SMC20C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC20C is usually 5 days.
3.What payment methods are accepted for 1.5SMC20C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC20C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC20C?
1.5SMC20C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC20C 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 1.5SMC20C?
For technical support, including 1.5SMC20C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC20C requirements.
6.How does Aetrix verify that 1.5SMC20C is sourced from the original manufacturer or authorized distributors?
All 1.5SMC20C 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 1.5SMC20C meets industry standards.
7.What is the process for return or replacement of 1.5SMC20C?
All 1.5SMC20C units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC20C, 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 1.5SMC20C part is unused and in its original packaging.
Return procedure for 1.5SMC20C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC20C Tags
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