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Taiwan Semiconductor Corporation P6SMB43H
- Part No.:
- P6SMB43H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB43H.pdf
- Description:
- 600W, 43V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:6,073
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Product details
Overview
P6SMB43H from Taiwan Semiconductor is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode with a breakdown voltage range of 38.7–47.3 V, stand-off voltage of 34.8 V, and clamping voltage of 61.9 V at 10 A peak pulse current. It features AEC-Q101 qualification, glass passivated junction, and DO-214AA (SMB) package - designed for automotive ESD and load-dump protection in power supply rails and CAN/LIN interfaces.
For engineers reviewing the P6SMB43H datasheet, P6SMB43H pinout, P6SMB43H application, or P6SMB43H equivalent, this device is selected for high-reliability transient suppression where low leakage (<1 µA @ 34.8 V), fast response (<1.0 ps), and ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance are required in automotive body control modules, infotainment power inputs, and sensor interface protection.
Technical Context
The P6SMB43H operates as a unidirectional avalanche diode, conducting only in reverse bias above its breakdown threshold to clamp transients while maintaining <1 µA leakage below 34.8 V. Its 10 °C/W junction-to-case thermal resistance enables reliable power dissipation under repetitive surge conditions when mounted on thermally adequate PCB copper.
It meets AEC-Q101 stress requirements including temperature cycling, humidity bias, and mechanical shock - confirming suitability for under-hood automotive environments. The device's 0.090 g mass and DO-214AA footprint support automated SMT placement without tombstoning risk.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 38.7 V / 47.3 V - defines guaranteed avalanche initiation window under 1 mA test current; ensures consistent clamping onset across production lots |
| VWM | 34.8 V - maximum continuous reverse operating voltage; sets safe DC rail margin before leakage rises above 1 µA |
| VC @ IPPM | 61.9 V at 10 A (10/1000 µs) - peak clamped voltage during worst-case surge; determines protected circuit's overvoltage exposure level |
| PPPSM | 600 W - non-repetitive peak pulse power rating; defines single-event energy handling capacity per IEC 61000-4-5 Level 4 |
| TJ max | +150 °C - maximum junction temperature; supports operation in engine bay ambient up to +125 °C with proper thermal design |
| IR @ VWM | <1 µA - ultra-low reverse leakage at stand-off voltage; prevents battery drain in always-on automotive circuits |
| Response time | <1.0 ps - sub-picosecond junction response enables suppression of ESD events before IC damage occurs |
Pinout & Package
DO-214AA (SMB) surface-mount package: 2-terminal, cathode-banded unidirectional configuration. Dimensions: 4.57 mm × 3.94 mm × 2.29 mm (L × W × H); matte tin-plated leads compliant with J-STD-002 solderability; polarity marked by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or lower-potential rail; carries surge current during clamping |
| Cathode | Reverse-biased avalanche terminal | Connected to protected line (e.g., 12 V supply); initiates clamping when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling (-55 °C to +150 °C), humidity bias, and mechanical shock - suitable for front-end power protection in BCMs and ADAS ECUs |
| Glass passivated junction | Enhances long-term stability and moisture resistance vs. epoxy-passivated alternatives; critical for under-hood longevity |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) without degradation |
| Low profile SMB package | Enables high-density PCB layouts and compatibility with standard SMT reflow profiles; eliminates need for through-hole mounting |
| J-STD-020 MSL Level 1 | Unlimited floor life at ≤30 °C/60% RH - no baking required prior to assembly, reducing manufacturing overhead |
Applications
| Automotive Body Control Module (BCM) Power Input | CAN Bus Transceiver Protection |
|---|---|
Use Scenario: 12 V supply line feeding microcontroller, relay drivers, and LED drivers in door modules or lighting controllers. IC Role / Device Role: Unidirectional TVS placed between VIN and GND to shunt load-dump spikes (ISO 7637-2 Pulse 5a) and alternator overshoot. Use Value: Clamps transients to ≤61.9 V, preventing latch-up or permanent damage to 3.3 V/5 V logic supplies downstream of LDOs. |
Use Scenario: CAN_H and CAN_L lines connecting ECU to gateway or sensor nodes in vehicle networks. IC Role / Device Role: Bidirectional protection not applicable here; P6SMB43H used on 12 V bias rail feeding CAN transceivers (e.g., TJA1042), not on differential bus lines. Use Value: Maintains <1 µA leakage at 34.8 V, avoiding false wake-up or quiescent current violations in sleep-mode CAN systems. |
| Automotive Lighting Driver Output | Infotainment System USB/Power Rail |
Use Scenario: Output stage of LED headlamp driver subject to inductive kickback from high-side switch turn-off. IC Role / Device Role: TVS placed across LED load terminals to absorb flyback energy and prevent MOSFET drain overvoltage. Use Value: 600 W peak power rating handles 100 ms load-dump surges without thermal runaway; 0.090 g mass avoids mechanical resonance in vibration-prone lamp housings. |
Use Scenario: 5 V/12 V input rail powering USB hub controllers, display backlight ICs, or audio amplifiers in center stack units. IC Role / Device Role: Primary transient suppressor upstream of DC-DC converters and LDOs, protecting against ESD and conducted noise from vehicle harnesses. Use Value: Fast <1.0 ps response ensures suppression before ±8 kV contact ESD pulses propagate into sensitive analog/digital circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43A | Same DO-214AC (SMA) package; 43 V nominal VBR; 400 W PPPSM; higher RθJA (75 °C/W) | Limited to lower-energy transients; less suitable for ISO 7637-2 Pulse 5a due to lower power rating | Select when board space allows SMA footprint and surge energy is ≤400 W |
| 1.5SMC43A | DO-214AB (SMC) package; same 43 V VBR; 1500 W PPPSM; larger 7.11 mm × 6.22 mm footprint | Overqualified for 600 W needs; requires PCB area increase of ~2.5× vs. SMB | Choose when future-proofing for higher surge levels or legacy SMC-compatible layouts exist |
Compared with SMAJ43A and 1.5SMC43A, the P6SMB43H delivers optimal balance of 600 W surge capability, SMB footprint efficiency, and AEC-Q101 validation - making it the preferred choice for new automotive designs targeting cost, size, and qualification alignment.
Availability
P6SMB43H is available at Aetrix Electronics and suitable for automotive body electronics, industrial power supplies, and consumer appliance control boards requiring stable component supply with AEC-Q101 assurance and ISO 7637-2 compliance.
Supply support for P6SMB43H 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 certification capability.
The P6SMB43H belongs to TSC's P6SMBxH series of automotive-grade TVS diodes engineered specifically for robust transient suppression in 12 V/24 V vehicle electrical systems - emphasizing low leakage, fast response, and under-hood thermal resilience.
FAQ
What is the polarity configuration of the P6SMB43H?
The P6SMB43H is a unidirectional TVS diode with cathode marking indicated by a band on the DO-214AA (SMB) package. It conducts only in reverse bias above its breakdown voltage (38.7–47.3 V), making it suitable for DC rail protection where polarity is fixed. Unlike bidirectional variants (e.g., P6SMB43AH), the P6SMB43H must be oriented with cathode toward the protected line and anode to ground.
Does the P6SMB43H meet AEC-Q101 requirements for automotive use?
Yes, the P6SMB43H is explicitly AEC-Q101 qualified per the manufacturer's documentation, covering stress tests including temperature cycling, high-temperature operating life, and mechanical shock. This qualification confirms its suitability for automotive applications such as body control modules, lighting drivers, and infotainment power inputs where reliability under harsh environmental conditions is mandatory.
What is the maximum clamping voltage of the P6SMB43H under standard test conditions?
The P6SMB43H has a maximum clamping voltage (VC) of 61.9 V when subjected to a 10 A peak pulse current with a 10/1000 µs waveform. This value is measured at TA = 25 °C and defines the upper voltage limit imposed on the protected circuit during transient events - critical for ensuring downstream ICs remain within their absolute maximum ratings.
Can the P6SMB43H be used in bidirectional signal line protection?
No, the P6SMB43H is unidirectional and not suitable for bidirectional signal lines like CAN or USB data pairs. For such applications, a bidirectional variant such as P6SMB43AH (with CH or CAH suffix) must be used, as it provides symmetrical clamping in both polarities. Using P6SMB43H on AC-coupled or differential lines risks forward conduction and failure.
What is the thermal resistance specification for the P6SMB43H?
The P6SMB43H has a junction-to-case thermal resistance (RθJC) of 10 °C/W and a junction-to-ambient thermal resistance (RθJA) of 55 °C/W, measured under standard JEDEC conditions. These values inform thermal design: for example, at 600 W peak power, junction temperature rise above case is limited to 60 °C, requiring adequate copper pour and airflow to maintain TJ ≤ 150 °C.
P6SMB43H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- P6SMB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 34.8V
- Voltage - Breakdown (Min):
- 38.7V
- Voltage - Clamping (Max) @ Ipp:
- 61.9V
- Current - Peak Pulse (10/1000µs):
- 10A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
P6SMB43H FAQ
1.How can I place an order for P6SMB43H through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB43H 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 P6SMB43H reliable?
The price and inventory of P6SMB43H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB43H is usually 5 days.
3.What payment methods are accepted for P6SMB43H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB43H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB43H?
P6SMB43H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB43H 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 P6SMB43H?
For technical support, including P6SMB43H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB43H requirements.
6.How does Aetrix verify that P6SMB43H is sourced from the original manufacturer or authorized distributors?
All P6SMB43H 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 P6SMB43H meets industry standards.
7.What is the process for return or replacement of P6SMB43H?
All P6SMB43H units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB43H, 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 P6SMB43H part is unused and in its original packaging.
Return procedure for P6SMB43H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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