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Taiwan Semiconductor Corporation 1K5SMPC15APH
- Part No.:
- 1K5SMPC15APH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
1K5SMPC15APH.pdf
- Description:
- 1500W, 15V, 5%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
1K5SMPC15APH from Taiwan Semiconductor is a unidirectional 1500W surface-mount transient voltage suppressor (TVS) diode with a nominal breakdown voltage of 15.0 V, stand-off voltage of 12.8 V, and clamping voltage of 21.2 V at 70.8 A peak pulse current. It is AEC-Q101 qualified and designed for automotive power line protection in BLDC motor drives and battery management systems.
For engineers reviewing the 1K5SMPC15APH datasheet, 1K5SMPC15APH pinout, 1K5SMPC15APH application, or 1K5SMPC15APH equivalent, key selection criteria include its 1500 W peak pulse power rating, TO-277A (SMPC4.6U) package thermal performance (RθJL = 6.4 °C/W), unidirectional polarity, and compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b and IEC 61000-4-2 Level 4.
Technical Context
This TVS diode operates as a unidirectional overvoltage clamp in DC power rails, leveraging avalanche breakdown to divert surge energy away from sensitive downstream circuitry. Its 10/1000 µs waveform rating supports robust protection against load dump and inductive switching transients common in automotive 12 V systems.
The device features a low junction-to-lead thermal resistance (6.4 °C/W) enabling efficient heat transfer to PCB copper pads, and its 175 °C maximum junction temperature allows operation in under-hood environments. The 0.076 %/°C temperature coefficient of VBR ensures predictable voltage drift across temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 14.3 / 15.0 / 15.8 V - defines precise avalanche onset threshold for reliable clamping initiation |
| VWM | 12.8 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 21.2 V - clamped voltage at 70.8 A peak pulse, limiting downstream voltage stress |
| PPPM | 1500 W - non-repetitive peak pulse power handling per 10/1000 µs waveform |
| TJ max | +175 °C - enables use in high-temperature automotive engine compartments |
| RθJL | 6.4 °C/W - low thermal resistance to PCB pad ensures effective power dissipation without external heatsink |
| αT | 0.076 %/°C - quantifies VBR drift with temperature for accurate system-level margining |
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 during clamping | Connected to protected circuit ground or low-side return path |
| Cathode 1 (Pin 1) | High-current surge return | Primary cathode terminal tied to power rail being protected (e.g., 12 V battery line) |
| Cathode 2 (Pin 2) | Parallel cathode connection | Internally bonded to Cathode 1; used for enhanced current sharing and thermal spreading on PCB |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated reliability for automotive power electronics including engine control units and body modules |
| ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance | Guarantees immunity to real-world automotive transients including load dump and inductive kickback |
| IEC 61000-4-2 Level 4 ESD immunity | Withstands ±15 kV air discharge and ±8 kV contact discharge without degradation |
| TO-277A thermal design | Optimized leadframe geometry delivers RθJL = 6.4 °C/W for direct PCB conduction cooling |
| Uni-directional polarity | Prevents forward conduction during normal operation while enabling fast reverse-biased clamping |
Applications
| BLDC Motor Drive Protection | Battery Management System (BMS) |
|---|---|
Use Scenario: Protecting gate drivers and MCU power rails from inductive flyback spikes during PWM commutation in 12 V automotive BLDC fans or pumps. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between motor phase output and ground plane. Use Value: Limits transient voltage to ≤21.2 V at 70.8 A, preventing latch-up or overvoltage damage to 3.3 V/5 V logic and MOSFET gate oxides. | Use Scenario: Safeguarding cell monitor ICs and charge/discharge FET controllers from load dump surges on main battery input lines. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12 V auxiliary supply rail feeding BMS analog front-end and communication interfaces. Use Value: Absorbs 1500 W surge energy per IEC 61000-4-2 and ISO 7637-2 Pulse 5a, maintaining rail integrity below 25 V for >100 ms. |
| Automotive Lighting Control | Switching Mode Power Supply (SMPS) |
Use Scenario: Suppressing turn-off transients in LED driver boost converters and headlamp H-bridge outputs. IC Role / Device Role / Timing Role: Fast-response unidirectional clamp on high-side switch node and low-side return path. Use Value: Clamps 10/1000 µs surges to 21.2 V within <1 ns response time, preserving LED driver IC lifetime and optical stability. | Use Scenario: Input-stage transient suppression for 12 V–5 V buck converters powering infotainment and ADAS subsystems. IC Role / Device Role / Timing Role: Front-end TVS on DC input rail upstream of EMI filter and controller IC. Use Value: Maintains VWM = 12.8 V standoff while clamping to 21.2 V, ensuring converter ICs remain within absolute maximum ratings during cold-crank events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A | Lower PPPM (400 W), SMA package (RθJA = 100 °C/W), no AEC-Q101 qualification | Limited to non-automotive industrial SMPS; unsuitable for under-hood BLDC or BMS | Select only for cost-sensitive consumer-grade 12 V supplies with ambient <85 °C |
| 1.5KE15A | Through-hole DO-201 package, higher RθJA (50 °C/W), same VBR range but lower surge life cycle endurance | Not suitable for automated SMT assembly; requires board space and wave solder process | Consider only for legacy through-hole designs where rework of footprint is not feasible |
Compared with SMAJ15A and 1.5KE15A, the 1K5SMPC15APH delivers 3.75× higher peak pulse power, AEC-Q101 validation, and superior thermal performance in a compact surface-mount package-making it the preferred choice for automotive-grade 12 V rail protection where reliability, density, and thermal margin are critical.
Availability
1K5SMPC15APH is available at Aetrix Electronics and suitable for automotive BLDC motor drives, battery management systems, lighting control modules, and switching mode power supplies requiring stable component supply and long-term production continuity.
Supply support for 1K5SMPC15APH 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 automotive and industrial certifications.
The 1K5SMPCxxAPH series was developed specifically for AEC-Q101-compliant transient suppression in 12 V automotive power networks, emphasizing high-power density, low thermal resistance, and robust ISO 7637-2 compliance.
FAQ
What is the maximum clamping voltage of the 1K5SMPC15APH at its rated peak pulse current?
The 1K5SMPC15APH has a maximum clamping voltage (VC) of 21.2 V when subjected to its rated peak pulse current (IPPM) of 70.8 A under the standard 10/1000 µs waveform. This value is measured at TA = 25 °C and ensures downstream components remain within safe operating voltage limits during surge events. The 1K5SMPC15APH maintains this clamping performance across its full operating temperature range due to its specified thermal coefficient.
Is the 1K5SMPC15APH suitable for bidirectional transient protection?
No, the 1K5SMPC15APH is a unidirectional TVS diode and must be installed with correct polarity-cathodes toward the protected power rail and anode to ground. It does not provide symmetrical clamping for AC or reversible transients. For bidirectional protection, a separate device such as a 1K5SMPC15CA (center-tapped or dual-diode configuration) would be required. The 1K5SMPC15APH datasheet explicitly specifies uni-directional polarity.
What is the recommended PCB pad layout for optimal thermal performance of the 1K5SMPC15APH?
Taiwan Semiconductor recommends a 16 mm × 16 mm copper pad per lead for the 1K5SMPC15APH to achieve its specified RθJL of 6.4 °C/W. The pad layout should follow the manufacturer's suggested outline in the datasheet (Version B2109, Page 4), using thermal vias under the cathode terminals to inner ground planes. Avoid narrow traces or isolated pads, as these increase thermal resistance and reduce surge current handling capability of the 1K5SMPC15APH.
Does the 1K5SMPC15APH meet automotive EMC test standards beyond ISO 7637-2?
Yes, the 1K5SMPC15APH meets IEC 61000-4-2 (ESD) Level 4 (±15 kV air, ±8 kV contact) and ISO 10605 (automotive ESD) Level L4. It also satisfies the surge immunity requirements of IEC 61000-4-5 (Line-to-Line: 1 kV, Line-to-Ground: 2 kV) when applied per standard test setup. These qualifications are documented in Taiwan Semiconductor's AEC-Q101 report and are integral to the 1K5SMPC15APH's automotive qualification scope.
What is the moisture sensitivity level (MSL) rating for the 1K5SMPC15APH?
The 1K5SMPC15APH has a moisture sensitivity level (MSL) of Level 1 per J-STD-020, meaning it is not humidity-sensitive and may be stored indefinitely at ambient conditions (<30 °C / 60% RH) without baking prior to reflow. This MSL rating eliminates floor-life constraints and simplifies SMT manufacturing flow for the 1K5SMPC15APH, supporting standard lead-free reflow profiles without preconditioning.
1K5SMPC15APH 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):
- 12.8V
- Voltage - Breakdown (Min):
- 14.3V
- Voltage - Clamping (Max) @ Ipp:
- 21.2V
- Current - Peak Pulse (10/1000µs):
- 70.8A
- 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
1K5SMPC15APH FAQ
1.How can I place an order for 1K5SMPC15APH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1K5SMPC15APH 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 1K5SMPC15APH reliable?
The price and inventory of 1K5SMPC15APH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1K5SMPC15APH is usually 5 days.
3.What payment methods are accepted for 1K5SMPC15APH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1K5SMPC15APH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1K5SMPC15APH?
1K5SMPC15APH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1K5SMPC15APH 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 1K5SMPC15APH?
For technical support, including 1K5SMPC15APH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1K5SMPC15APH requirements.
6.How does Aetrix verify that 1K5SMPC15APH is sourced from the original manufacturer or authorized distributors?
All 1K5SMPC15APH 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 1K5SMPC15APH meets industry standards.
7.What is the process for return or replacement of 1K5SMPC15APH?
All 1K5SMPC15APH units undergo pre-shipment inspection (PSI). If there is an issue with 1K5SMPC15APH, 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 1K5SMPC15APH part is unused and in its original packaging.
Return procedure for 1K5SMPC15APH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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