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Taiwan Semiconductor Corporation 1K5SMPC43APH
- Part No.:
- 1K5SMPC43APH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
1K5SMPC43APH.pdf
- Description:
- 1500W, 43V, 5%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
1K5SMPC43APH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in TO-277A (SMPC4.6U) package, rated for 43.0 V breakdown voltage (VBR), 36.8 V standoff voltage (VWM), and 1500 W peak pulse power (10/1000 µs). It delivers 25.3 A peak pulse current and clamps to 59.3 V at that level, supporting automotive-grade surge protection in BLDC motor drives and battery management systems.
For engineers reviewing the 1K5SMPC43APH datasheet, 1K5SMPC43APH pinout, 1K5SMPC43APH application, or 1K5SMPC43APH equivalent, key selection criteria include its AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, unidirectional polarity, 175 °C maximum junction temperature, and TO-277A thermal performance (RθJL = 6.4 °C/W).
Technical Context
This TVS diode operates as a unidirectional clamping device, leveraging silicon avalanche technology to limit transient overvoltages before they damage downstream circuitry. Its electrical behavior is defined by precise VBR (40.9–45.2 V), VWM (36.8 V), and VC (59.3 V at 25.3 A), with temperature coefficient αT = 0.092 %/°C enabling accurate VBR derating across –55 °C to +175 °C junction range.
Designed for high-energy transients, it sustains 1500 W non-repetitive peak pulse power under standardized 10/1000 µs waveform per Fig.3, with thermal design supported by RθJC = 8.9 °C/W and RθJA = 51.1 °C/W on 16 mm × 16 mm Cu pad PCB - critical for automotive power electronics where layout-constrained thermal management is essential.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 40.9 / 43.0 / 45.2 V - defines precise avalanche onset threshold for reliable clamping initiation |
| VWM | 36.8 V - maximum continuous reverse operating voltage without significant leakage |
| VC @ IPPM | 59.3 V - clamped voltage during 25.3 A transient, limiting stress on protected ICs |
| PPPM | 1500 W - peak pulse power handling capability per 10/1000 µs waveform |
| IPPM | 25.3 A - corresponding peak surge current at VC, used for PCB trace sizing |
| αT | 0.092 %/°C - enables accurate VBR adjustment over temperature for robust system-level design |
| RθJL | 6.4 °C/W - low junction-to-lead thermal resistance supports high-power pulse dissipation into PCB copper |
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 forward conduction; reference node for reverse-biased clamping | Connected to ground or low-impedance return path to enable effective transient shunting |
| Cathode 1 (Pin 1) | Primary cathode terminal for reverse-biased TVS operation | Connected to protected line (e.g., motor phase, battery rail); carries full IPPM |
| Cathode 2 (Pin 2) | Secondary cathode terminal, electrically tied to Cathode 1 internally | Provides mechanical stability and enhanced current sharing; must be routed to same net as Pin 1 |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS power rails |
| ISO 7637-2 Pulse 1/2a/2b/3a/3b compliant | Guarantees immunity to real-world automotive load-dump and inductive switching transients |
| IEC 61000-4-2 Level 4 & ISO 10605 L4 certified | Ensures ESD robustness up to ±15 kV contact discharge in harsh vehicle environments |
| TO-277A thermal performance (RθJL = 6.4 °C/W) | Enables efficient heat transfer to PCB copper, supporting sustained surge duty cycles in SMPS designs |
| Uni-directional polarity with 36.8 V VWM | Allows integration on DC-biased lines (e.g., 36 V battery systems) without forward conduction loss |
Applications
| BLDC Motor Drive Protection | Battery Management System (BMS) |
|---|---|
Use Scenario: Suppresses inductive kickback and commutation spikes on 3-phase inverter legs driving automotive BLDC motors. IC Role / Device Role / Timing Role: Unidirectional TVS placed between phase output and ground to clamp transients below MOSFET VDSS rating. Use Value: Prevents gate oxide damage and shoot-through failure by limiting voltage overshoot to ≤59.3 V during 25.3 A surges. | Use Scenario: Protects cell monitoring ICs and communication interfaces from load dump and jump-start transients on 12–48 V battery stacks. IC Role / Device Role / Timing Role: Standoff-rated TVS on main battery input rail, absorbing 1500 W pulses without degradation. Use Value: Maintains system uptime by preventing latch-up or burnout of analog front-end components during ISO 7637-2 Pulse 5a events. |
| Automotive Lighting Control | On-Board Charger (OBC) Input Stage |
Use Scenario: Shields LED driver ICs and CAN transceivers from switching noise and relay bounce in headlamp and DRL modules. IC Role / Device Role / Timing Role: Clamping device on 12 V supply rail upstream of DC/DC converters and microcontrollers. Use Value: Ensures functional safety compliance (ISO 26262 ASIL-B) by eliminating transient-induced resets or data corruption. | Use Scenario: Guards AC/DC rectifier output and PFC stage inputs against grid surges and regenerative energy spikes during EV charging. IC Role / Device Role / Timing Role: Primary surge suppression element on high-voltage DC bus (e.g., 400 V nominal), rated for repeated 1500 W pulses. Use Value: Extends OBC reliability by reducing thermal stress on electrolytic capacitors and MOSFETs through controlled clamping at 59.3 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43A | DO-214AC package; lower PPPM (400 W); VBR = 47.8–53.1 V; RθJA ≈ 100 °C/W | Not AEC-Q101 qualified; unsuitable for automotive under-hood use | Select only for cost-sensitive industrial SMPS where AEC-Q101 and ISO 7637-2 are not required |
| 1.5KE43A | DO-201AD axial lead; 1500 W rating; VBR = 45.2–50.0 V; no AEC-Q101 or automotive qualification | Through-hole mounting limits board density; lacks moisture sensitivity level 1 rating | Use only in legacy or non-automotive designs where surface-mount constraints do not apply |
Compared with SMAJ43A and 1.5KE43A, the 1K5SMPC43APH provides superior thermal performance (RθJL = 6.4 °C/W vs. >30 °C/W), automotive qualification, and compact TO-277A footprint - making it the only option suitable for space-constrained, high-reliability automotive power stages requiring repeatable 1500 W surge handling.
Availability
1K5SMPC43APH is available at Aetrix Electronics and suitable for BLDC motor drives, battery management systems, automotive lighting control, and on-board charger input stages requiring stable component supply, AEC-Q101 compliance, and repeatable 1500 W transient suppression.
Supply support for 1K5SMPC43APH 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 automotive qualification capabilities.
The 1K5SMPCxxAPH series is designed specifically for high-energy transient suppression in automotive power electronics, targeting ISO 7637-2-compliant systems where compact surface-mount packaging, AEC-Q101 reliability, and precise clamping performance are mandatory.
FAQ
What is the breakdown voltage tolerance for 1K5SMPC43APH?
The 1K5SMPC43APH has a specified breakdown voltage range of 40.9 V (minimum) to 45.2 V (maximum) at 1.0 mA test current, with a typical value of 43.0 V. This ±5% tolerance ensures consistent clamping behavior across production lots and supports robust design margins in automotive power rails where overvoltage thresholds must remain predictable under temperature variation and aging.
Is 1K5SMPC43APH suitable for bidirectional transient protection?
No, 1K5SMPC43APH is a unidirectional TVS diode and is not suitable for bidirectional protection. Its internal structure supports clamping only in reverse bias; forward conduction occurs above ~1.2 V. For AC-coupled or bipolar signal lines, a dedicated bidirectional part such as 1K5SMPC43CA must be selected - the 1K5SMPC43APH is intended exclusively for DC-biased rails like battery feeds and motor phase outputs.
What is the maximum junction temperature rating for 1K5SMPC43APH?
The 1K5SMPC43APH has a maximum junction temperature (TJ) rating of +175 °C, validated per AEC-Q101 stress testing. This allows operation in under-hood automotive environments and high-temperature industrial power supplies. Derating of peak pulse power begins above 25 °C ambient, following the curve in Fig.1 of the datasheet, with full 1500 W capability maintained up to TJ = 125 °C under proper PCB thermal design.
Does 1K5SMPC43APH meet RoHS and halogen-free requirements?
Yes, 1K5SMPC43APH is RoHS compliant and halogen-free per IEC 61249-2-21. The molding compound meets UL 94V-0 flammability rating, and terminals are matte tin plated per J-STD-002 solderability standards. These material qualifications support compliance with automotive OEM environmental directives and facilitate lead-free reflow assembly in high-volume manufacturing.
How is the 1K5SMPC43APH marked on the package?
The 1K5SMPC43APH is marked with "SMPC43AP" as the device marking code on the top surface of the TO-277A (SMPC4.6U) package, along with date code (YW) and factory code (F). This marking aligns with the ordering information table and distinguishes it from adjacent variants (e.g., SMPC47AP for 47 V), enabling traceability and visual verification during incoming inspection and SMT placement.
1K5SMPC43APH 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):
- 36.8V
- Voltage - Breakdown (Min):
- 40.9V
- Voltage - Clamping (Max) @ Ipp:
- 59.3V
- Current - Peak Pulse (10/1000µs):
- 25.3A
- 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
1K5SMPC43APH FAQ
1.How can I place an order for 1K5SMPC43APH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1K5SMPC43APH 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 1K5SMPC43APH reliable?
The price and inventory of 1K5SMPC43APH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1K5SMPC43APH is usually 5 days.
3.What payment methods are accepted for 1K5SMPC43APH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1K5SMPC43APH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1K5SMPC43APH?
1K5SMPC43APH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1K5SMPC43APH 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 1K5SMPC43APH?
For technical support, including 1K5SMPC43APH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1K5SMPC43APH requirements.
6.How does Aetrix verify that 1K5SMPC43APH is sourced from the original manufacturer or authorized distributors?
All 1K5SMPC43APH 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 1K5SMPC43APH meets industry standards.
7.What is the process for return or replacement of 1K5SMPC43APH?
All 1K5SMPC43APH units undergo pre-shipment inspection (PSI). If there is an issue with 1K5SMPC43APH, 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 1K5SMPC43APH part is unused and in its original packaging.
Return procedure for 1K5SMPC43APH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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