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Taiwan Semiconductor Corporation 1K5SMPC33APH
- Part No.:
- 1K5SMPC33APH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
1K5SMPC33APH.pdf
- Description:
- 1500W, 33V, 5%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:5,997
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Product details
Overview
1K5SMPC33APH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in TO-277A (SMPC4.6U) package, rated for 33.0 V breakdown voltage (VBR), 28.2 V standoff voltage (VWM), and 1500 W peak pulse power (10/1000 µs). It delivers 32.8 A peak pulse current (IPPM) and clamps to 45.7 V at that current, supporting automotive-grade surge protection in BLDC motor drives and battery management systems.
For engineers reviewing the 1K5SMPC33APH datasheet, 1K5SMPC33APH pinout, 1K5SMPC33APH application, or 1K5SMPC33APH equivalent, key selection criteria include its AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, unidirectional polarity, 175 °C max junction temperature, and TO-277A thermal performance (RθJL = 6.4 °C/W).
Technical Context
This TVS diode operates as a unidirectional clamping device, activated when reverse voltage exceeds VBR (31.4–34.7 V), limiting transient energy by diverting surge current to ground. Its low clamping ratio (VC/VBR ≈ 1.39) and tight VBR tolerance (±5%) ensure predictable overvoltage protection under fast transients.
Designed for high-reliability automotive environments, it meets IEC 61000-4-2 Level 4 (±15 kV air, ±8 kV contact) and ISO 10605 (330 pF/330 Ω), with thermal robustness enabled by RθJC = 8.9 °C/W and UL 94V-0 molding compound. Polarity is fixed: Anode (Pin 3), Cathode (Pins 1 & 2).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 31.4 / 33.0 / 34.7 V - defines precise turn-on threshold for transient clamping |
| VWM | 28.2 V - maximum continuous reverse operating voltage before leakage rises |
| VC @ IPPM | 45.7 V - clamped voltage during 1500 W surge, limiting downstream stress |
| IPPM | 32.8 A - peak surge current capability under 10/1000 µs waveform |
| PPPM | 1500 W - non-repetitive peak pulse power handling per JEDEC standard |
| TJ max | +175 °C - enables operation in under-hood automotive locations without derating |
| αT | 0.089 %/°C - temperature coefficient of VBR, enabling accurate thermal compensation |
Pinout & Package
Package: TO-277A (SMPC4.6U), surface-mount, 3-terminal, unidirectional configuration with dual cathode terminals for enhanced current sharing and thermal distribution.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode 1 | Transient current sink (reverse-biased path) | Primary cathode terminal; connects to protected line (e.g., motor phase or BMS rail) |
| Cathode 2 | Transient current sink (parallel path) | Second cathode terminal; reduces effective series inductance and improves surge current sharing |
| Anode | Common reference / ground return | Connected to system ground; completes clamping path during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use per stress test requirements (HTOL, TC, HAST, etc.) |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance) |
| UL 94V-0 molding compound | Ensures flame retardancy in enclosed automotive modules and power electronics enclosures |
| Matte tin-plated leads | Guarantees solderability per J-STD-002 and eliminates whisker risk per JESD 201 Class 2 |
| Low thermal resistance (RθJL = 6.4 °C/W) | Enables efficient heat transfer to PCB copper pad, supporting sustained surge duty cycles |
Applications
| BLDC Motor Drive Protection | Battery Management System (BMS) |
|---|---|
Use Scenario: Suppresses switching-induced voltage spikes on motor phase lines during PWM commutation in 12–48 V automotive BLDC drives. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed across each phase-to-ground path to clamp transients below MOSFET VDSS rating. Use Value: Prevents gate oxide damage and shoot-through failure by limiting clamped voltage to 45.7 V at 32.8 A surge current. | Use Scenario: Protects cell monitoring ICs and communication interfaces from load-dump and jump-start transients on 24–48 V battery rails. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main battery input, upstream of DC-DC converters and analog front-ends. Use Value: Maintains system uptime by absorbing 1500 W surges per IEC 61000-4-5 Ed.3 Annex C without degradation. |
| Automotive Lighting Control | On-Board Charger (OBC) Input Stage |
Use Scenario: Shields LED driver ICs and CAN transceivers from ESD and load-dump events in headlamp and tail lamp modules. IC Role / Device Role / Timing Role: Localized TVS at connector interface and IC supply pins to meet ISO 10605 L4 (±25 kV air) requirements. Use Value: Achieves zero field failures in lighting ECU validation due to 0.089 %/°C VBR stability across -40 to +125 °C ambient. | Use Scenario: Guards AC-DC rectifier output and PFC stage inputs against grid surges and regenerative braking feedback in EV OBCs. IC Role / Device Role / Timing Role: High-power clamping element between rectifier bridge and bulk capacitor, rated for repetitive 10/1000 µs pulses. Use Value: Enables 10-year field life by sustaining 200 A IFSM surge capability and 175 °C junction temperature margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33A | DO-214AC package; lower PPPM (400 W); higher VC/VBR ratio (1.55) | Limited to low-energy consumer or industrial applications; not AEC-Q101 qualified | Select only if space constraints prohibit TO-277A and surge energy remains below 400 W |
| TPSMD33A | TO-277A package; same VBR range; lower PPPM (1000 W); no ISO 7637-2 certification | Suitable for non-automotive industrial SMPS but lacks automotive transient immunity validation | Choose when cost sensitivity outweighs need for full automotive qualification and 1500 W rating |
Compared with SMAJ33A and TPSMD33A, the 1K5SMPC33APH provides superior automotive-grade surge immunity (1500 W, ISO 7637-2 Pulse 1–3b, AEC-Q101), tighter VBR tolerance, and lower clamping voltage-making it the only option qualified for under-hood BLDC and BMS deployments requiring long-term reliability.
Availability
1K5SMPC33APH is available at Aetrix Electronics and suitable for automotive BLDC motor control, battery management systems, on-board chargers, and lighting ECUs requiring stable component supply across multi-year production programs.
Supply support for 1K5SMPC33APH 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 ISO/TS 16949 and AEC-Q200 certified production.
The 1K5SMPCxxAPH series is part of TSC's automotive-grade TVS portfolio, engineered specifically for high-energy transient suppression in 12–48 V vehicle subsystems where AEC-Q101 reliability and ISO 7637-2 immunity are mandatory.
FAQ
What is the exact breakdown voltage range for 1K5SMPC33APH?
The 1K5SMPC33APH has a guaranteed breakdown voltage (VBR) range of 31.4 V (min) to 34.7 V (max) at 1.0 mA test current, with a nominal value of 33.0 V. This tight ±5% tolerance ensures consistent clamping behavior across production lots and temperature extremes, critical for protecting sensitive gate drivers and analog sensors in automotive applications. The 1K5SMPC33APH maintains this specification under full AEC-Q101 stress screening.
Is 1K5SMPC33APH suitable for bidirectional transient protection?
No, the 1K5SMPC33APH is strictly unidirectional and must be used with correct polarity: Anode (Pin 3) to ground, Cathodes (Pins 1 & 2) to the protected line. It does not conduct or clamp in forward bias and offers no protection against positive-going transients on grounded lines. For bidirectional protection, a separate symmetric TVS array or dual-diode configuration is required-not provided by the 1K5SMPC33APH.
Does 1K5SMPC33APH meet ISO 7637-2 Pulse 5a (load dump)?
No, the 1K5SMPC33APH is validated for ISO 7637-2 Pulses 1, 2a, 2b, 3a, and 3b-but not Pulse 5a (load dump), which requires higher energy absorption and often a dedicated load-dump suppressor or TVS with >3000 W rating. The 1K5SMPC33APH's 1500 W PPPM is insufficient for Pulse 5a; it is intended for lower-energy switching transients and ESD, not alternator-induced surges.
What is the recommended PCB pad layout for 1K5SMPC33APH?
Taiwan Semiconductor specifies a 16 mm × 16 mm copper pad for optimal thermal performance, matching the test board used for RθJA = 51.1 °C/W characterization. The pad must fully expose the anode and cathode terminals with minimum 0.3 mm solder mask clearance. Thermal vias (≥6 × 0.3 mm) beneath the pad are strongly advised to enhance heat dissipation in high-duty-cycle applications like BLDC motor drives using the 1K5SMPC33APH.
How does temperature affect the clamping voltage of 1K5SMPC33APH?
The clamping voltage (VC) of the 1K5SMPC33APH increases with junction temperature due to its positive temperature coefficient of VBR (αT = 0.089 %/°C). At 150 °C, VBR rises ~11.1% above its 25 °C value, shifting the clamping curve upward. Designers must verify that the elevated VC at max operating temperature remains below the protected circuit's absolute maximum rating-especially critical in under-hood BMS and OBC applications using the 1K5SMPC33APH.
1K5SMPC33APH 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):
- 28.2V
- Voltage - Breakdown (Min):
- 31.4V
- Voltage - Clamping (Max) @ Ipp:
- 45.7V
- Current - Peak Pulse (10/1000µs):
- 32.8A
- 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
1K5SMPC33APH FAQ
1.How can I place an order for 1K5SMPC33APH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1K5SMPC33APH 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 1K5SMPC33APH reliable?
The price and inventory of 1K5SMPC33APH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1K5SMPC33APH is usually 5 days.
3.What payment methods are accepted for 1K5SMPC33APH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1K5SMPC33APH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1K5SMPC33APH?
1K5SMPC33APH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1K5SMPC33APH 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 1K5SMPC33APH?
For technical support, including 1K5SMPC33APH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1K5SMPC33APH requirements.
6.How does Aetrix verify that 1K5SMPC33APH is sourced from the original manufacturer or authorized distributors?
All 1K5SMPC33APH 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 1K5SMPC33APH meets industry standards.
7.What is the process for return or replacement of 1K5SMPC33APH?
All 1K5SMPC33APH units undergo pre-shipment inspection (PSI). If there is an issue with 1K5SMPC33APH, 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 1K5SMPC33APH part is unused and in its original packaging.
Return procedure for 1K5SMPC33APH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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