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Taiwan Semiconductor Corporation 1.5SMC56H
- Part No.:
- 1.5SMC56H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC56H.pdf
- Description:
- 1500W, 56V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:2,699
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Product details
Overview
1.5SMC56H from Taiwan Semiconductor is a unidirectional 1500W surface-mount transient voltage suppressor (TVS) diode with a 50.4–61.6V breakdown voltage, 45.4V working stand-off voltage, and 80.5V maximum clamping voltage at 19A peak pulse current. It features glass passivated junction, AEC-Q101 qualification, and ISO 7637-2 compliance for automotive load-dump and surge immunity.
For engineers reviewing the 1.5SMC56H datasheet, 1.5SMC56H pinout, 1.5SMC56H application, or 1.5SMC56H equivalent, this TVS diode is selected for robust overvoltage protection in DC power rails, automotive ECUs, and industrial I/O interfaces where fast response (<1ps), low leakage (<1µA), and DO-214AB package compatibility are critical.
Technical Context
The 1.5SMC56H operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds its VBR range (50.4–61.6V @ 1mA). Its glass-passivated silicon junction ensures stable breakdown and low leakage under steady-state bias up to 45.4V (VWM).
Under transient conditions, it limits induced surges-such as ISO 7637-2 Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnect), and Pulse 3a/3b (line transients)-to ≤80.5V at 19A (10/1000µs waveform), dissipating up to 1500W peak power with thermal resistance RθJA = 50°C/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 50.4 V / 61.6 V @ 1 mA - defines reliable avalanche initiation threshold across temperature and unit variation |
| VWM | 45.4 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 80.5 V @ 19 A (10/1000 µs) - clamped voltage seen by protected circuit during worst-case surge |
| PPK | 1500 W - peak transient power handling capability without failure |
| IR @ VWM | <1 µA - negligible standby current draw on 45V DC rails, preserving system efficiency |
| TJ max | +150 °C - enables operation in under-hood automotive environments and high-ambient industrial enclosures |
| Package | DO-214AB (SMC) - industry-standard surface-mount outline with 7.11 × 6.22 mm footprint and matte tin leads |
Pinout & Package
1.5SMC56H uses a two-terminal DO-214AB (SMC) package with cathode band marking. The device has no internal complexity-only anode and cathode terminals-and is mounted with standard reflow profiles per J-STD-020 Level 1 moisture sensitivity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference node for unidirectional clamping | Connected to ground or low-side return path; establishes polarity-sensitive surge shunting direction |
| Cathode | Transient input node | Connected to protected line (e.g., 48V supply rail); conducts avalanche current to anode during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics use including engine control, body modules, and ADAS power domains |
| ISO 7637-2 compliant (Pulse 1/2a/2b/3a/3b) | Guarantees immunity to real-world vehicle electrical transients without external filtering redesign |
| Glass passivated junction | Ensures long-term stability of VBR and low IR drift over temperature and lifetime cycling |
| Fast response time <1 ps | Clamps ESD and lightning-induced spikes before sensitive downstream ICs experience overstress |
| RoHS & halogen-free (IEC 61249-2-21) | Meets global environmental compliance requirements for industrial and consumer end equipment |
Applications
| Automotive Power Rail Protection | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting 48V battery-fed ECUs against load dump and alternator switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between supply rail and chassis ground. Use Value: Limits transient excursions to ≤80.5V, preventing damage to 65V-rated DC-DC controllers and CAN transceivers. |
Use Scenario: Safeguarding 24V digital input channels on programmable logic controllers exposed to field wiring surges. IC Role / Device Role / Timing Role: Front-end transient suppressor on isolated input optocoupler stage. Use Value: Absorbs 1500W pulses while maintaining <1µA leakage, ensuring signal integrity and low false-trigger rate. |
| Telecom DC Power Feeds | Consumer Appliance Motor Drive Supplies |
Use Scenario: Shielding PoE-powered network switches and base station radios from induced lightning surges on 48V DC feeds. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side DC bus prior to DC-DC conversion. Use Value: Clamps 10/1000µs surges to 80.5V within 1ps, meeting IEC 61000-4-5 Level 4 immunity requirements. |
Use Scenario: Suppressing commutation spikes on brushed motor power lines in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Parallel-mounted TVS across motor terminals to quench inductive kickback. Use Value: Handles repetitive 19A pulses without degradation, extending MCU and gate driver lifetime in cost-sensitive white goods. |
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 | Lower peak power (600W), SMB package (smaller footprint, higher RθJA = 65°C/W) | Suitable for lower-energy transients; not rated for ISO 7637-2 Pulse 1 or automotive load dump | Select when space-constrained and surge energy is limited to ≤600W; verify thermal margin at full ambient. |
| 1.5KE56A | Through-hole TO-204AA (DO-41) package; same 1500W rating but slower response (~1ns) and no AEC-Q101 qualification | Used in legacy industrial power supplies where automated SMT assembly is not required | Choose only for manual assembly or retrofit; lacks automotive qualification and SMC's optimized thermal path. |
Compared with 1.5SMC56H, SMBJ56A offers smaller size but reduced surge capacity and automotive suitability, while 1.5KE56A provides identical power rating in through-hole form but lacks AEC-Q101 validation and modern SMT process compatibility.
Availability
1.5SMC56H is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC input protection, and telecom DC power feed applications requiring stable component supply, AEC-Q101 compliance, and DO-214AB packaging.
Supply support for 1.5SMC56H 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 1.5SMCxxH series was designed specifically for high-reliability, high-power transient suppression in automotive and industrial environments-emphasizing AEC-Q101 qualification, ISO 7637-2 compliance, and robust glass-passivated junction construction.
FAQ
What is the polarity configuration of the 1.5SMC56H?
The 1.5SMC56H is a unidirectional TVS diode, configured with cathode band marking indicating the transient-input terminal. It conducts only during reverse-biased overvoltage events-clamping positive transients on the cathode side to ground via the anode. Bidirectional variants require CH or CAH suffixes (e.g., 1.5SMC56CH), which are distinct part numbers.
Does the 1.5SMC56H meet AEC-Q101 stress test requirements?
Yes, the 1.5SMC56H is explicitly AEC-Q101 qualified per the manufacturer's documentation. This includes testing for high-temperature operating life, temperature cycling, humidity bias, and mechanical shock-validating its suitability for automotive under-hood and chassis-mounted applications where reliability is mission-critical.
What is the maximum clamping voltage of the 1.5SMC56H under standardized surge conditions?
The 1.5SMC56H exhibits a maximum clamping voltage (VC) of 80.5 V when subjected to a 10/1000 µs waveform at its rated peak pulse current of 19 A. This value is measured per ANSI/IEEE C62.35 and represents the upper bound voltage imposed on the protected circuit during worst-case transient events.
Can the 1.5SMC56H be used in bidirectional signal line protection?
No-the 1.5SMC56H is unidirectional only and must not be used on AC or bidirectional data lines without external circuitry. For symmetrical surge protection (e.g., RS-485, CAN bus), select a purpose-built bidirectional variant such as 1.5SMC56CH, which delivers matched clamping in both polarities and is explicitly characterized for that function.
What is the thermal resistance from junction to ambient for the 1.5SMC56H in standard PCB layout?
The 1.5SMC56H has a typical junction-to-ambient thermal resistance (RθJA) of 50°C/W when mounted on a standard FR-4 PCB with minimum recommended copper pad area per the DO-214AB footprint. This value assumes no additional heatsinking; actual performance improves with larger copper planes or thermal vias.
1.5SMC56H 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC56H FAQ
1.How can I place an order for 1.5SMC56H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC56H 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 1.5SMC56H reliable?
The price and inventory of 1.5SMC56H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC56H is usually 5 days.
3.What payment methods are accepted for 1.5SMC56H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC56H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC56H?
1.5SMC56H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC56H 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 1.5SMC56H?
For technical support, including 1.5SMC56H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC56H requirements.
6.How does Aetrix verify that 1.5SMC56H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC56H 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 1.5SMC56H meets industry standards.
7.What is the process for return or replacement of 1.5SMC56H?
All 1.5SMC56H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC56H, 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 1.5SMC56H part is unused and in its original packaging.
Return procedure for 1.5SMC56H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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