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Taiwan Semiconductor Corporation 1.5SMC56C
- Part No.:
- 1.5SMC56C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC56C.pdf
- Description:
- 1500W, 56V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:2,376
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Product details
Overview
1.5SMC56C from Taiwan Semiconductor is a unidirectional 1500W surface-mount transient voltage suppressor (TVS) diode with a nominal breakdown voltage of 56V, clamping voltage of 80.5V at 19A peak pulse current, and working stand-off voltage of 45.4V. It features glass passivated junction, <1.0ps 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 1.5SMC56C datasheet, 1.5SMC56C pinout, 1.5SMC56C application, or 1.5SMC56C equivalent, this TVS diode is selected for robust overvoltage immunity in telecom power supplies, industrial PLC I/O modules, and automotive body control units where fast clamping and low leakage (<1µA @ 45.4V) are critical.
Technical Context
This unidirectional TVS operates as a clamping device across DC supply lines, activating when transient voltage exceeds its 50.4–61.6V breakdown range (tested at 1mA). Its DO-214AB (SMC) package enables high-power dissipation (1500W peak, 6.5W steady-state) with thermal resistance of 50°C/W junction-to-ambient.
The device exhibits low temperature coefficient (0.103%/°C), stable clamping performance up to +150°C junction temperature, and complies with JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1 - confirming suitability for lead-free reflow assembly without preconditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR Min/Max | 50.4V / 61.6V - defines minimum and maximum voltage at which device enters avalanche conduction under 1mA test current |
| VWM | 45.4V - maximum continuous reverse operating voltage before significant leakage begins |
| VC@IPPM | 80.5V at 19A - clamped voltage during 10/1000µs surge, limiting downstream circuit stress |
| IPPM | 19A - peak impulse current capability per single 10/1000µs waveform, derated above 25°C ambient |
| PPK | 1500W - non-repetitive peak pulse power handling capacity per Fig.5 waveform |
| IR@VWM | <1µA - ensures negligible standby power loss and signal integrity in high-impedance circuits |
| TJ Max | +150°C - maximum junction temperature rating enabling operation in under-hood or enclosed industrial environments |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, single-diode configuration with cathode band marking. Matte tin-plated leads meet J-STD-002 solderability; polarity is unidirectional, with cathode identified by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-voltage rail; forms return path during clamping |
| Cathode | High-side transient input terminal | Connected to protected line (e.g., 48V bus); conducts avalanche current to anode during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| Clamping speed | <1.0ps response - limits voltage overshoot before protection activates, preserving sensitive ICs |
| Leakage performance | <1µA @ VWM - avoids false triggering and minimizes quiescent current in battery-powered systems |
| Automated placement compatibility | DO-214AB outline with J-STD-002-compliant terminations - supports high-yield SMT assembly without tombstoning |
| Environmental compliance | RoHS-compliant, halogen-free per IEC 61249-2-21, UL 94V-0 molding - meets global regulatory and safety requirements |
| Automotive transients | ISO 7637-2 Pulse 1/2a/2b/3a/3b certified - validated for load-dump, jump-start, and coupling noise in vehicle ECUs |
Applications
| Telecom Power Input Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: Protecting 48V DC input stage of VoIP gateways and base station power converters from lightning-induced surges and hot-swap transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground to clamp positive-going transients before they reach DC/DC controllers. Use Value: 80.5V clamping voltage ensures downstream 60V-rated MOSFETs and controllers remain within safe SOA during 1kV/0.5Ω surge events. |
Use Scenario: Shielding 24V digital input channels on programmable logic controllers from field-wiring induced transients and relay coil flyback. IC Role / Device Role / Timing Role: Standoff protection element mounted at connector entry point, shunting energy away from optocoupler input stages. Use Value: 45.4V working voltage allows full utilization of 24V ±10% nominal range while maintaining <1µA leakage to preserve input threshold accuracy. |
| Automotive Body Control Module (BCM) | Medical Equipment DC Power Rails |
Use Scenario: Safeguarding 12V supply lines in BCMs against ISO 7637-2 Pulse 1 (inductive load dump) and Pulse 3b (capacitive discharge). IC Role / Device Role / Timing Role: Primary clamping device parallel to fuse and upstream of LDO regulators, absorbing >100J pulses without degradation. Use Value: 1500W peak power rating and 150°C junction rating enable reliable operation in engine bay-adjacent mounting locations. |
Use Scenario: Securing auxiliary 5V/12V rails in diagnostic imaging subsystems from ESD events during cable connection and internal switching noise. IC Role / Device Role / Timing Role: Final-stage transient filter before analog front-end ASICs and precision ADC references. Use Value: Low 0.103%/°C VBR drift ensures stable clamping threshold across clinical operating temperatures (10–40°C), preventing false trips. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ56A (Bourns) | Same DO-214AA package; 600W PPK, lower 56.1–62.3V VBR, 93.6V VC @ 10.1A | Limited to lower-energy transients; not rated for ISO 7637-2 Pulse 1 | Select when system-level surge energy is ≤600W and space constraints favor smaller SMB footprint |
| SMCJ56A (Littelfuse) | Identical DO-214AB package; 1500W PPK, but 56.1–62.3V VBR, 93.6V VC @ 16.6A, higher 10µA IR | Higher clamping voltage reduces margin for 60V-rated components; wider VBR tolerance affects consistency | Acceptable for cost-sensitive industrial designs where 93.6V clamping is acceptable and leakage sensitivity is low |
Compared with 1.5SMC56C, SMBJ56A offers smaller size but insufficient peak power for automotive load-dump; SMCJ56A matches power rating but trades tighter VBR control and lower leakage for broader vendor availability - making 1.5SMC56C optimal for high-reliability 48V/24V systems requiring precise clamping and minimal standby loss.
Availability
1.5SMC56C is available at Aetrix Electronics and suitable for telecom infrastructure power inputs, industrial PLC I/O protection, and automotive body control modules requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1.5SMC56C 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 ISO/TS 16949 and AEC-Q101 qualified production lines.
The 1.5SMCxx series was designed specifically for high-energy transient suppression in automotive, industrial, and telecom power systems - emphasizing low clamping ratio, tight VBR tolerance, and robust thermal performance in surface-mount packages.
FAQ
What is the polarity configuration of the 1.5SMC56C?
The 1.5SMC56C is a unidirectional TVS diode, configured with anode and cathode terminals. The cathode is marked by a band on the DO-214AB package body. It conducts only during positive transients on the cathode side relative to anode, making it suitable for DC rail protection where polarity is fixed. This differs from bidirectional variants like 1.5SMC56CA, which protect both polarities.
Does the 1.5SMC56C meet AEC-Q101 qualification for automotive use?
The 1.5SMC56C is not explicitly AEC-Q101 qualified per publicly available TSC documentation; however, it meets ISO 7637-2 Pulse 1/2a/2b/3a/3b and operates up to +150°C junction temperature - key requirements for automotive transients. For AEC-Q101–mandated programs, engineers should verify qualification status directly with Taiwan Semiconductor's latest release documentation before design-in.
What is the maximum clamping voltage of the 1.5SMC56C under standard test conditions?
The 1.5SMC56C has a maximum clamping voltage (VC) of 80.5V when subjected to a 10/1000µs waveform peak impulse current (IPPM) of 19A at TA = 25°C. This value is guaranteed per the datasheet's Electrical Specifications table and represents the upper limit of voltage seen by downstream circuitry during worst-case surge events.
Can the 1.5SMC56C be used in bidirectional signal line protection?
No - the 1.5SMC56C is unidirectional and unsuitable for AC or bidirectional signal lines. For such applications, the bidirectional variant 1.5SMC56CA must be used, as it provides symmetrical clamping in both directions. Using 1.5SMC56C on AC signals risks forward conduction during negative half-cycles and potential device failure.
What is the moisture sensitivity level (MSL) and reflow profile requirement for the 1.5SMC56C?
The 1.5SMC56C has a moisture sensitivity level (MSL) of Level 1 per J-STD-020, meaning it may be stored indefinitely at ≤30°C/60% RH and requires no baking prior to lead-free reflow. Its matte tin-plated leads comply with J-STD-002, supporting standard Pb-free reflow profiles with peak temperatures up to 260°C.
1.5SMC56C 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):
- 45.4V
- Voltage - Breakdown (Min):
- 50.4V
- Voltage - Clamping (Max) @ Ipp:
- 80.5V
- Current - Peak Pulse (10/1000µs):
- 19A
- 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)
1.5SMC56C FAQ
1.How can I place an order for 1.5SMC56C through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC56C 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 1.5SMC56C reliable?
The price and inventory of 1.5SMC56C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC56C is usually 5 days.
3.What payment methods are accepted for 1.5SMC56C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC56C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC56C?
1.5SMC56C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC56C 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 1.5SMC56C?
For technical support, including 1.5SMC56C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC56C requirements.
6.How does Aetrix verify that 1.5SMC56C is sourced from the original manufacturer or authorized distributors?
All 1.5SMC56C 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 1.5SMC56C meets industry standards.
7.What is the process for return or replacement of 1.5SMC56C?
All 1.5SMC56C units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC56C, 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 1.5SMC56C part is unused and in its original packaging.
Return procedure for 1.5SMC56C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC56C Tags
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