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Taiwan Semiconductor Corporation 1.5SMC56
- Part No.:
- 1.5SMC56
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC56.pdf
- Description:
- 1500W, 56V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:4,604
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Product details
Overview
1.5SMC56 from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for primary-level overvoltage protection in DC power rails and signal lines. It features a 50.4–61.6 V breakdown voltage (VBR), 45.4 V working stand-off voltage (VWM), 80.5 V maximum clamping voltage (VC) at 19 A peak pulse current, and 1500 W peak pulse power rating per 10/1000 µs waveform - deployed in telecom front-ends, industrial I/O modules, and automotive body control units.
For engineers reviewing the 1.5SMC56 datasheet, 1.5SMC56 pinout, 1.5SMC56 application, or 1.5SMC56 equivalent, this device is evaluated for ESD immunity (IEC 61000-4-2), load-dump surge resilience (ISO 7637-2 Pulse 1/2a/2b/3a/3b), and high-reliability placement in automated SMT lines with DO-214AB (SMC) package compatibility.
Technical Context
This unidirectional TVS operates as a clamping device that remains non-conductive below VWM = 45.4 V and rapidly transitions to low-impedance conduction when transient voltages exceed VBR (min 50.4 V, max 61.6 V at 1.0 mA test current). Its glass-passivated junction ensures stable leakage (<1 µA at VWM) and fast response (<1.0 ps).
Thermal performance is defined by RθJA = 50 °C/W and RθJC = 15 °C/W, supporting operation from –55 °C to +150 °C junction temperature. The device meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements for high-volume industrial assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 1.0 mA | 50.4–61.6 V - defines minimum and maximum voltage at which avalanche conduction initiates under standardized test conditions |
| VWM | 45.4 V - maximum continuous DC or RMS voltage the device blocks without significant leakage |
| VC @ IPPM = 19 A | 80.5 V - clamped voltage seen across protected circuit during 10/1000 µs surge, limiting downstream stress |
| PPK | 1500 W - peak transient power dissipation capability for non-repetitive 1 ms pulses |
| IR @ VWM | <1 µA - ensures negligible standby current draw in battery-powered or low-power systems |
| Package | DO-214AB (SMC) - industry-standard surface-mount outline with 0.210 g mass and matte tin-plated leads |
| Junction Temp Range | –55 °C to +150 °C - supports deployment in under-hood automotive, factory-floor PLCs, and outdoor telecom enclosures |
Pinout & Package
Package: DO-214AB (SMC), molded plastic case with cathode band marking for unidirectional polarity. Matte tin-plated leads meet J-STD-002 solderability and JESD201 Class 2 whisker resistance requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or return path; forms current sink during clamping event |
| Cathode | Protected line input | Connected to supply rail or signal line being safeguarded; carries transient energy to ground |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures long-term parameter stability and low leakage drift across temperature and lifetime |
| Fast response time <1.0 ps | Enables suppression of nanosecond-scale ESD events before sensitive ICs experience overstress |
| Meets ISO 7637-2 Pulse 1/2a/2b/3a/3b | Validated for automotive load-dump and inductive switching transients without derating |
| RoHS & halogen-free compliance | Supports environmentally regulated production in EU, China, and North American markets |
| Moisture sensitivity level 1 | Eliminates bake requirements prior to reflow, reducing manufacturing cost and cycle time |
Applications
| Telecom Power Input Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: Protecting 48 V DC power inputs in VoIP gateways and base station remote radio units from lightning-induced surges and hot-swap transients. IC Role / Device Role / Timing Role: Primary clamping element placed directly at connector entry point, shunting >1 kV transients to chassis ground before reaching DC-DC converters. Use Value: Limits voltage to ≤80.5 V during 19 A 10/1000 µs surge, preventing damage to upstream PMICs and maintaining system uptime per GR-1089-CORE. |
Use Scenario: Safeguarding 24 V digital input channels on programmable logic controllers exposed to relay coil flyback and field wiring ESD. IC Role / Device Role / Timing Role: Unidirectional TVS mounted adjacent to optocoupler input, clamping transients within 1 ps to preserve signal integrity and timing margins. Use Value: Maintains <1 µA leakage at 24 V nominal, avoiding false triggering while delivering 1500 W surge capacity compliant with IEC 61000-4-4 Level 4. |
| Automotive Body Control Module (BCM) | Consumer Appliance Motor Drive Board |
Use Scenario: Protecting LIN bus power rails and microcontroller VDD supplies in BCMs subjected to ISO 7637-2 load dump (Pulse 5a) up to 60 V. IC Role / Device Role / Timing Role: Standoff-rated TVS placed between fuse output and LDO input, conducting only during overvoltage excursions above 45.4 V. Use Value: Withstands 1500 W peak power and operates reliably from –40 °C to +125 °C ambient, meeting AEC-Q200 stress test requirements. |
Use Scenario: Shielding MCU GPIOs and H-bridge gate drivers in washing machine motor control boards from brush-commutator noise and ESD during service access. IC Role / Device Role / Timing Role: Low-capacitance TVS integrated into PCB layout near motor driver ICs, minimizing trace inductance for effective high-frequency transient capture. Use Value: Delivers sub-1 µA leakage at 12 V logic rails and clamps 8 kV contact ESD per IEC 61000-4-2 to <85 V, preventing latch-up in 3.3 V peripherals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ56A (Bourns) | Same DO-214AA (SMB) package; lower PPK = 600 W; VC = 93.6 V @ 6.4 A | Limited to lower-energy transients; not suitable for ISO 7637-2 Pulse 5a load dump | Select when board space constraints require SMB footprint and surge energy is ≤600 W |
| 1.5KE56A (ON Semiconductor) | Through-hole DO-15 package; identical VBR/VC specs but higher thermal resistance (RθJA ≈ 60 °C/W) | Requires wave soldering; unsuitable for fully SMT production or high-density layouts | Choose only for legacy through-hole designs or prototyping where rework tolerance is prioritized over automation |
Compared with SMBJ56A and 1.5KE56A, the 1.5SMC56 delivers 2.5× higher peak power handling in an SMT-optimized DO-214AB package, enabling robust protection in space-constrained automotive and industrial PCBs without compromising surge margin or manufacturability.
Availability
1.5SMC56 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and automotive body control modules requiring stable component supply and full compliance with ISO 7637-2 and IEC 61000-4-x standards.
Supply support for 1.5SMC56 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 Science Park, Taiwan, specializing in TVS diodes, rectifiers, and MOSFETs for industrial and automotive markets.
The 1.5SMC series was engineered specifically for high-power, surface-mount transient suppression in harsh environments - emphasizing low clamping ratio, tight VBR tolerance, and AEC-Q200-ready reliability for mission-critical power and signal lines.
FAQ
What is the clamping voltage of the 1.5SMC56 under standard surge conditions?
The 1.5SMC56 exhibits a maximum clamping voltage (VC) of 80.5 V when subjected to a 10/1000 µs waveform with a peak impulse current (IPPM) of 19 A. This value is measured per ANSI/IEEE C62.35 and ensures downstream components see limited overvoltage stress during transient events. The 1.5SMC56 maintains this clamping performance across its full operating temperature range.
Is the 1.5SMC56 suitable for bidirectional transient protection?
No - the 1.5SMC56 is a unidirectional TVS diode intended for DC rail protection with defined anode/cathode polarity. For bidirectional applications such as AC lines or data buses, Taiwan Semiconductor offers the 1.5SMC56CA variant (with "CA" suffix), which provides symmetrical clamping in both directions. The 1.5SMC56 itself must be oriented with cathode toward the protected line.
Does the 1.5SMC56 meet automotive qualification standards?
The 1.5SMC56 is not AEC-Q200 certified as a standalone part, but its construction - including glass-passivated junction, DO-214AB package with JESD201 Class 2 whisker resistance, and ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance - aligns with key automotive stress requirements. System-level validation is required for AEC-Q200 qualification; the 1.5SMC56 is widely used in BCM and infotainment power stages.
What is the maximum steady-state power dissipation for the 1.5SMC56?
The 1.5SMC56 has a steady-state power dissipation (PD) rating of 6.5 W at TA = 25 °C. This value decreases linearly with rising ambient temperature per the derating curve in Figure 2 of the datasheet, reaching zero at approximately 150 °C. It reflects continuous DC power handling - distinct from its 1500 W peak pulse rating.
How does the 1.5SMC56 compare to the 1.5SMC56A variant?
The 1.5SMC56A offers tighter breakdown voltage tolerance (53.2–58.8 V vs. 50.4–61.6 V for the 1.5SMC56) and slightly lower clamping voltage (77.0 V vs. 80.5 V at 20 A). Both share identical package, thermal specs, and surge ratings. The 1.5SMC56A is preferred where precise voltage thresholding is critical; the 1.5SMC56 remains optimal for cost-sensitive, high-volume applications with broader design margins.
1.5SMC56 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:
- 1
- Bidirectional Channels:
- -
- 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)
1.5SMC56 FAQ
1.How can I place an order for 1.5SMC56 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC56 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 1.5SMC56 reliable?
The price and inventory of 1.5SMC56 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC56 is usually 5 days.
3.What payment methods are accepted for 1.5SMC56?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC56 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC56?
1.5SMC56 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC56 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 1.5SMC56?
For technical support, including 1.5SMC56 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC56 requirements.
6.How does Aetrix verify that 1.5SMC56 is sourced from the original manufacturer or authorized distributors?
All 1.5SMC56 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 1.5SMC56 meets industry standards.
7.What is the process for return or replacement of 1.5SMC56?
All 1.5SMC56 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC56, 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 1.5SMC56 part is unused and in its original packaging.
Return procedure for 1.5SMC56:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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