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Taiwan Semiconductor Corporation 1K5SMPC18APH
- Part No.:
- 1K5SMPC18APH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
1K5SMPC18APH.pdf
- Description:
- 1500W, 18V, 5%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:3,595
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Product details
Overview
1K5SMPC18APH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in TO-277A (SMPC4.6U) package, rated for 1500 W peak pulse power (10/1000 µs), 18.0 V nominal breakdown voltage (VBR), and 25.2 V maximum clamping voltage (VC) at 59.5 A peak pulse current - used for surge protection in automotive BLDC motor drives and battery management systems.
For engineers reviewing the 1K5SMPC18APH datasheet, 1K5SMPC18APH pinout, 1K5SMPC18APH application, or 1K5SMPC18APH equivalent, key selection criteria include unidirectional polarity, IEC 61000-4-2 Level 4 / ISO 10605 L4 ESD compliance, ISO 7637-2 Pulse 1/2a/2b/3a/3b immunity, AEC-Q101 qualification, and thermal resistance RθJL = 6.4 °C/W.
Technical Context
This TVS diode operates as a unidirectional clamping device with a defined breakdown threshold (17.1–18.9 V at 1 mA test current) and precise clamping behavior (25.2 V at 59.5 A). Its junction-to-lead thermal resistance of 6.4 °C/W enables effective heat dissipation into PCB copper pads under repetitive surge conditions.
Designed for automotive-grade reliability, it meets AEC-Q101 stress testing requirements and supports operation across –55 °C to +175 °C junction temperature range. The device's low leakage (<1.0 µA at VWM = 15.3 V, TA = 25 °C) ensures minimal standby power loss in high-impedance signal or supply lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 17.1 / 18.0 / 18.9 V at 1 mA - defines precise overvoltage triggering threshold for circuit protection |
| VWM | 15.3 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 25.2 V at 59.5 A - clamping voltage limiting downstream component stress during 10/1000 µs transients |
| PPPM | 1500 W - peak pulse power handling per single 10/1000 µs waveform, derated above 25 °C |
| RθJL | 6.4 °C/W - enables thermal design with standard 16 mm × 16 mm Cu pad for sustained surge duty |
| TJ Range | –55 °C to +175 °C - supports under-hood automotive environments without derating |
| Temp Coefficient αT | 0.080 %/°C - allows accurate VBR prediction across full operating temperature range |
Pinout & Package
Package: TO-277A (SMPC4.6U), surface-mount, unidirectional, matte tin-plated leads, UL 94V-0 molding compound, 0.095 g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 3) | Current entry terminal during forward conduction | Connected to system ground or lower-potential rail; defines unidirectional clamping direction |
| Cathode 1 (Pin 1) | Primary cathode connection | Connected to protected line (e.g., motor phase, battery rail); carries full surge current |
| Cathode 2 (Pin 2) | Secondary cathode connection | Internally tied to Cathode 1; provides dual-pad mechanical stability and current sharing on PCB |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTOL, TCT, UHAST, and ESD |
| IEC 61000-4-2 Level 4 & ISO 10605 L4 | Withstands ±15 kV air discharge and ±8 kV contact discharge without degradation |
| ISO 7637-2 Pulse immunity | Survives standardized load-dump and inductive-switching transients (Pulse 1, 2a, 2b, 3a, 3b) |
| Moisture sensitivity level 1 | No floor life limitation or baking required prior to reflow soldering per J-STD-020 |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing |
Applications
| BLDC Motor Drive Protection | Battery Management System (BMS) |
|---|---|
Use Scenario: Suppresses inductive kickback and load dump surges on three-phase inverter legs driving automotive BLDC motors. IC Role / Device Role / Timing Role: Unidirectional TVS placed between each motor phase and chassis ground to clamp transients below MOSFET drain-source breakdown. Use Value: Limits VC to 25.2 V at 59.5 A, protecting 30–40 V rated Si MOSFETs without derating margin loss. | Use Scenario: Guards high-side monitoring circuits and cell-balancing ICs against jump-start and alternator load-dump events in 12 V–48 V battery packs. IC Role / Device Role / Timing Role: Standoff-rated TVS on battery input rail, absorbing up to 1500 W for ≤1000 µs while maintaining <1.0 µA leakage at 15.3 V. Use Value: Enables direct integration with precision analog front-ends without signal corruption or offset drift. |
| Automotive Lighting Control | On-Board Charger (OBC) Input Stage |
Use Scenario: Protects LED driver ICs and CAN/LIN communication interfaces from ESD and switching noise in headlamp and tail lamp modules. IC Role / Device Role / Timing Role: Localized TVS on power inputs and data lines, leveraging low capacitance and fast response (<1 ns) to preserve signal integrity. Use Value: Meets ISO 10605 L4 and IEC 61000-4-2 Level 4 without adding filtering delay or impedance mismatch. | Use Scenario: Shields AC/DC PFC stage and DC-link capacitors from grid-side surges and regenerative energy spikes during EV charging cycles. IC Role / Device Role / Timing Role: Primary surge limiter on OBC DC-input bus, coordinated with upstream MOVs and downstream polymer fuses. Use Value: Delivers 1500 W clamping capability with RθJL = 6.4 °C/W, enabling compact thermal layout on high-density OBC PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18A | DO-214AC package; 1500 W rating; VBR = 20.0–22.2 V; higher VC = 29.2 V at 51.4 A | Larger footprint; lower thermal conductivity (RθJA ≈ 65 °C/W vs. 51.1 °C/W) | Acceptable where board space permits and thermal budget allows higher ambient rise |
| TPSMD18A | TO-277A package; same footprint; VBR = 18.0–20.0 V; VC = 27.5 V at 54.5 A; AEC-Q101 qualified | Higher clamping voltage; slightly lower surge current rating | Drop-in replacement only if system can tolerate +2.3 V higher clamping under max surge |
Compared with SMAJ18A and TPSMD18A, the 1K5SMPC18APH offers tighter VBR tolerance (±5%), lower clamping voltage (25.2 V), and superior thermal performance (RθJL = 6.4 °C/W), making it optimal for space-constrained, thermally demanding automotive modules requiring precise voltage limiting.
Availability
1K5SMPC18APH is available at Aetrix Electronics and suitable for automotive BLDC motor drives, battery management systems, lighting control units, and on-board chargers requiring stable component supply, AEC-Q101 compliance, and repeatable surge immunity performance.
Supply support for 1K5SMPC18APH 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 Company (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, and rectifiers with global automotive and industrial certifications.
The SMPCxAPH series is designed specifically for high-reliability automotive transient suppression, targeting under-hood applications where AEC-Q101 qualification, low clamping voltage, and robust thermal performance are mandatory.
FAQ
What is the exact breakdown voltage range for 1K5SMPC18APH at 1 mA test current?
The 1K5SMPC18APH has a guaranteed breakdown voltage range of 17.1 V (minimum) to 18.9 V (maximum) at 1 mA test current, with 18.0 V as the nominal value. This tight ±5% tolerance ensures consistent overvoltage triggering across production lots and temperature extremes, critical for protecting sensitive gate drivers and microcontrollers in automotive systems.
Is 1K5SMPC18APH suitable for bidirectional surge protection?
No, the 1K5SMPC18APH is a unidirectional TVS diode and must be used with correct polarity - anode to ground, cathodes to protected line. It does not suppress positive-going transients on grounded lines. For bidirectional protection, two 1K5SMPC18APH devices in series-opposed configuration or a dedicated bidirectional part like 1K5SMPC18APB would be required.
What is the maximum clamping voltage of 1K5SMPC18APH and at what current is it specified?
The maximum clamping voltage of 1K5SMPC18APH is 25.2 V, measured at 59.5 A peak pulse current using the standard 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and forms the basis for downstream component voltage margining in designs such as 24 V BLDC inverters and 12 V BMS front-ends.
Does 1K5SMPC18APH meet automotive ESD standards?
Yes, 1K5SMPC18APH meets IEC 61000-4-2 Level 4 (±15 kV air, ±8 kV contact) and ISO 10605 Level L4 (±15 kV air, ±8 kV contact) ESD requirements. These ratings are verified per AEC-Q101 test conditions and confirmed in the official Taiwan Semiconductor datasheet revision B2109, ensuring suitability for infotainment, lighting, and body control modules.
What is the recommended PCB pad layout for 1K5SMPC18APH?
Taiwan Semiconductor specifies a 16 mm × 16 mm copper pad for optimal thermal performance. The TO-277A (SMPC4.6U) package requires symmetric, thermally robust pads for Pins 1 and 2 (cathodes) and Pin 3 (anode), with internal thermal vias recommended beneath the pad to enhance heat transfer to inner layers or ground planes - critical to maintain RθJL = 6.4 °C/W in high-surge applications.
1K5SMPC18APH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- TO-277, 3-PowerDFN
- Series:
- 1K5SMPC
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 15.3V
- Voltage - Breakdown (Min):
- 17.1V
- Voltage - Clamping (Max) @ Ipp:
- 25.2V
- Current - Peak Pulse (10/1000µs):
- 59.5A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMPC4.6U
1K5SMPC18APH FAQ
1.How can I place an order for 1K5SMPC18APH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1K5SMPC18APH 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 1K5SMPC18APH reliable?
The price and inventory of 1K5SMPC18APH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1K5SMPC18APH is usually 5 days.
3.What payment methods are accepted for 1K5SMPC18APH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1K5SMPC18APH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1K5SMPC18APH?
1K5SMPC18APH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1K5SMPC18APH 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 1K5SMPC18APH?
For technical support, including 1K5SMPC18APH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1K5SMPC18APH requirements.
6.How does Aetrix verify that 1K5SMPC18APH is sourced from the original manufacturer or authorized distributors?
All 1K5SMPC18APH 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 1K5SMPC18APH meets industry standards.
7.What is the process for return or replacement of 1K5SMPC18APH?
All 1K5SMPC18APH units undergo pre-shipment inspection (PSI). If there is an issue with 1K5SMPC18APH, 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 1K5SMPC18APH part is unused and in its original packaging.
Return procedure for 1K5SMPC18APH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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