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Taiwan Semiconductor Corporation 1.5SMC27H
- Part No.:
- 1.5SMC27H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC27H.pdf
- Description:
- 1500W, 27V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:4,639
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Product details
Overview
1.5SMC27H from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, rated for 1500W peak pulse power, 24.3–29.7V breakdown voltage (VBR), and 39.1V maximum clamping voltage (VC) at 40A peak impulse current. It protects automotive and industrial power rails against ESD, load dump, and lightning-induced transients.
For engineers reviewing the 1.5SMC27H datasheet, 1.5SMC27H pinout, 1.5SMC27H application, or 1.5SMC27H equivalent, this device delivers AEC-Q101 qualification, <1.0ps response time, <1μA leakage above 21.8V working stand-off voltage, and ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance - critical for robust front-end protection in 24V systems.
Technical Context
The 1.5SMC27H employs a glass-passivated silicon junction optimized for fast transient suppression in unidirectional configurations. Its thermal design supports 150°C maximum junction temperature with 15°C/W junction-to-case resistance, enabling reliable operation under repetitive surge stress in automotive ECUs and industrial PLC I/O modules.
It operates with a 21.8V working stand-off voltage (VWM) and exhibits a 0.096%/°C temperature coefficient of VBR, ensuring stable clamping behavior across -55°C to +150°C ambient range. The device meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity requirements for automated SMT assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 24.3V / 29.7V - defines minimum and maximum voltage at which device enters avalanche conduction under 1mA test current |
| VWM | 21.8V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 39.1V at 40A - clamping voltage during 10/1000μs surge, limiting downstream voltage stress |
| PPK | 1500W - peak pulse power handling capability per single 1ms waveform per Fig.5 |
| IR @ VWM | <1μA - ensures minimal standby power loss and signal integrity in high-impedance circuits |
| TJ max | +150°C - enables deployment in under-hood automotive environments without derating |
| Package | DO-214AB (SMC) - industry-standard surface-mount outline with 0.210g mass and UL 94V-0 molding compound |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with matte tin-plated leads, cathode band marking polarity on unidirectional variants. Compatible with standard SMT reflow profiles per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to protected circuit ground or low-side return path | Enables unidirectional clamping from cathode to anode during positive transients on cathode side |
| Cathode | Transient voltage sensing and clamping node; marked with band | Connected to line being protected (e.g., 24V rail); conducts avalanche current to anode when VKA exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| Glass passivated junction | Ensures stable VBR tolerance and long-term leakage performance under humidity and thermal stress |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load disconnect), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) waveforms |
| Fast response time | <1.0ps - limits voltage overshoot during nanosecond-scale ESD events before protection engages |
| Moisture sensitivity Level 1 | No dry-pack or baking required prior to reflow; supports unlimited floor life at ≤30°C/60% RH |
Applications
| Automotive Body Control Module (BCM) | Industrial 24V PLC Digital Input |
|---|---|
Use Scenario: Protecting microcontroller GPIO and CAN transceiver power pins from load dump and jump-start transients in vehicle body electronics. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 24V supply rail and chassis ground to clamp surges up to ±100V. Use Value: Limits voltage seen by downstream LDOs and logic ICs to ≤39.1V, preventing latch-up and permanent damage during ISO 7637-2 Pulse 5a events. |
Use Scenario: Safeguarding optocoupler input stages and field-side signal conditioning circuits in programmable logic controller digital input modules. IC Role / Device Role / Timing Role: Front-end transient suppressor on 24V sensor supply line, positioned before series current-limiting resistor. Use Value: Absorbs 1500W surge energy without degradation, maintaining <1μA leakage to preserve analog accuracy and reduce false triggering. |
| Telecom Power Interface | Medical Equipment DC Power Entry |
Use Scenario: Shielding Ethernet PHY power supplies and PoE injectors from induced lightning surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12V/24V auxiliary power rail feeding communication ICs. Use Value: Responds in <1.0ps to limit transient propagation into sensitive SerDes and clock recovery circuits. |
Use Scenario: Guarding isolated DC-DC converter inputs in portable diagnostic devices exposed to ESD during clinical handling. IC Role / Device Role / Timing Role: Secondary-level TVS on low-noise 5V/3.3V internal rails after primary isolation barrier. Use Value: Provides <1μA leakage and RoHS/halogen-free construction compliant with IEC 60601-1 collateral standard for patient-connected equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ27A | Bidirectional variant; 27V VWM, 43.5V VC @ 34.5A; same DO-214AA package but lower PPK (600W) | Supports AC-coupled lines or bidirectional data bus protection where polarity reversal may occur | Select SMBJ27A only if bidirectional clamping is required and 600W peak power suffices; not drop-in for unidirectional 1500W needs |
| 1.5KE27C | Through-hole TO-204AA (DO-41); 27V VWM, 43.5V VC @ 34.5A; 1500W rating but slower response (~1ns) | Suitable for legacy PCBs or high-vibration environments where SMT reliability is a concern | Choose 1.5KE27C for through-hole assembly or mechanical ruggedness; avoid if automated SMT or <1.0ps response is mandatory |
Compared with SMBJ27A and 1.5KE27C, the 1.5SMC27H uniquely combines 1500W SMT-rated surge capacity, AEC-Q101 qualification, and sub-picosecond response in DO-214AB - making it optimal for space-constrained, high-reliability 24V automotive and industrial power rail protection.
Availability
1.5SMC27H is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC digital inputs, telecom power interfaces, and medical DC power entry points requiring stable component supply and full AEC-Q101 traceability.
Supply support for 1.5SMC27H 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 global distribution and AEC-Q101 validation capabilities.
The 1.5SMC27H belongs to TSC's high-power surface-mount TVS family designed specifically for automotive and industrial transient immunity - emphasizing low clamping ratio, fast response, and robust SMT manufacturability.
FAQ
What is the clamping voltage of the 1.5SMC27H under maximum surge conditions?
The 1.5SMC27H has a maximum clamping voltage (VC) of 39.1V at 40A peak impulse current (IPPM) using the 10/1000μs waveform defined in Fig.5. This value ensures downstream components see no more than 39.1V during worst-case transient events, supporting safe operation of 3.3V/5V logic and 24V-rated regulators.
Is the 1.5SMC27H suitable for automotive applications?
Yes, the 1.5SMC27H is AEC-Q101 qualified and meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements. Its 150°C maximum junction temperature, glass-passivated junction, and JESD201 Class 2 whisker resistance make it appropriate for engine bay and chassis-mounted automotive electronics where thermal and mechanical reliability are critical.
How does the 1.5SMC27H differ from the 1.5SMC27AH variant?
The 1.5SMC27AH has tighter VBR tolerance (25.7–28.4V vs. 24.3–29.7V for 1.5SMC27H) and slightly higher VWM (23.1V vs. 21.8V), resulting in lower leakage and improved noise margin. Both share identical package, power rating, and clamping performance, but 1.5SMC27AH is preferred for precision-sensitive designs requiring tighter voltage control.
What is the thermal resistance of the 1.5SMC27H?
The 1.5SMC27H has a junction-to-case thermal resistance (RθJC) of 15°C/W and junction-to-ambient resistance (RθJA) of 50°C/W under standard PCB mounting conditions. These values enable effective heat dissipation during repetitive surge events and support sustained operation at 150°C junction temperature when properly heatsinked.
Does the 1.5SMC27H require special handling during PCB assembly?
No - the 1.5SMC27H is rated Moisture Sensitivity Level 1 per J-STD-020, meaning it can be stored indefinitely at ≤30°C/60% RH without dry packing or baking. It is compatible with standard lead-free reflow profiles and requires no special handling beyond typical SMT best practices for DO-214AB packages.
1.5SMC27H 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):
- 21.8V
- Voltage - Breakdown (Min):
- 24.3V
- Voltage - Clamping (Max) @ Ipp:
- 39.1V
- Current - Peak Pulse (10/1000µs):
- 40A
- 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)
1.5SMC27H FAQ
1.How can I place an order for 1.5SMC27H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC27H 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 1.5SMC27H reliable?
The price and inventory of 1.5SMC27H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC27H is usually 5 days.
3.What payment methods are accepted for 1.5SMC27H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC27H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC27H?
1.5SMC27H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC27H 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 1.5SMC27H?
For technical support, including 1.5SMC27H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC27H requirements.
6.How does Aetrix verify that 1.5SMC27H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC27H 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 1.5SMC27H meets industry standards.
7.What is the process for return or replacement of 1.5SMC27H?
All 1.5SMC27H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC27H, 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 1.5SMC27H part is unused and in its original packaging.
Return procedure for 1.5SMC27H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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