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Taiwan Semiconductor Corporation P6SMB43A
- Part No.:
- P6SMB43A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB43A.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,001
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Product details
Overview
P6SMB43A from Taiwan Semiconductor is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode with a nominal breakdown voltage of 40.9–45.2 V, clamping voltage of 59.3 V at 10.6 A, and stand-off voltage of 36.8 V. It features glass-passivated junction, <1 μA reverse leakage at rated VWM, and meets ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive surge immunity. It protects DC power rails in switching mode power supplies and adapters.
For engineers reviewing the P6SMB43A datasheet, P6SMB43A pinout, P6SMB43A application, or P6SMB43A equivalent, key selection criteria include its 36.8 V working voltage, 59.3 V clamping performance under 10/1000 μs surge, DO-214AA (SMB) package compatibility, and unidirectional polarity marking - all critical for robust overvoltage protection in compact industrial and consumer power designs.
Technical Context
The P6SMB43A operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its minimum breakdown threshold of 40.9 V at 1 mA test current. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1 μA @ 36.8 V), enabling reliable hold-off in 36 V nominal systems.
With a thermal resistance of RθJA = 55 °C/W and maximum junction temperature of 150 °C, it sustains repeated 600 W peak pulse power (10/1000 μs) without degradation. Its fast response (<1.0 ps rise time) and compliance with ISO 7637-2 make it suitable for automotive load-dump and inductive-switching transient suppression.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36.8 V - Maximum continuous reverse operating voltage; defines safe DC rail margin before conduction begins |
| VBR (min/max) | 40.9 V / 45.2 V - Breakdown range at 1 mA; ensures predictable turn-on across temperature and unit variation |
| VC @ IPPM | 59.3 V at 10.6 A - Clamping voltage during 10/1000 μs surge; determines protected circuit's maximum transient stress |
| PPPSM | 600 W - Peak pulse power rating; supports high-energy transients common in automotive and industrial power inputs |
| IR @ VWM | <1 μA - Reverse leakage at stand-off voltage; minimizes standby power loss and avoids false triggering |
| Package | DO-214AA (SMB) - Surface-mount outline with 0.090 g mass; compatible with automated pick-and-place and reflow soldering |
| TJ max | +150 °C - Maximum junction temperature; enables operation in high-ambient environments like enclosed power adapters |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with matte tin-plated leads, cathode band marking polarity, and UL 94V-0 flammability rating. Weight ≈ 0.090 g. Polarity is marked by a band on the cathode end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current input / Surge return path | Connected to system ground or low-side reference; completes clamping loop during transient events |
| Cathode | Protected line connection | Connected to the line being protected (e.g., +36 V rail); conducts avalanche current when VAK > VBR |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional configuration | Enables precise DC rail protection with asymmetric clamping; avoids forward conduction during normal operation |
| Glass-passivated junction | Ensures long-term stability of VBR and low leakage under humidity and thermal cycling per J-STD-020 Level 1 |
| ISO 7637-2 compliance | Validated for automotive Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line spikes) |
| Fast response time | <1.0 ps from 0 V to VBR min - limits voltage overshoot before clamping engages, protecting downstream ICs |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS directives; supports environmentally compliant manufacturing and end-of-life handling |
Applications
| Switching Mode Power Supply (SMPS) | AC-DC Adapters |
|---|---|
Use Scenario: Input rectifier output or primary-side DC bus subjected to line surges and MOSFET switching spikes. IC Role / Device Role: Unidirectional TVS diode placed across bulk capacitor to clamp positive transients and prevent overvoltage failure of controller ICs and electrolytics. Use Value: With 59.3 V clamping at 10.6 A and 600 W peak rating, P6SMB43A limits transient excursions below 60 V on 36 V nominal rails - preserving reliability of 65 V-rated MOSFETs and controllers. |
Use Scenario: Secondary-side 36 V output rail exposed to load-dump events during hot-plug or cable disconnect. IC Role / Device Role: Standoff protector between output and connector, absorbing energy from inductive cable capacitance discharge. Use Value: 36.8 V VWM provides 10% margin above nominal 36 V output while maintaining <1 μA leakage - minimizing no-load power loss in energy-efficient adapters. |
| Industrial Motor Drives | Automotive Body Control Modules (BCM) |
Use Scenario: DC link in 24–48 V motor drive inverters experiencing regenerative braking spikes and relay contact bounce. IC Role / Device Role: Parallel-connected TVS on DC bus to absorb repetitive 10/1000 μs transients up to 600 W without thermal runaway. Use Value: RθJA = 55 °C/W and TJ max = 150 °C allow sustained operation at 70 °C ambient - meeting industrial derating requirements for continuous duty cycles. |
Use Scenario: 12 V/24 V supply input to BCM exposed to ISO 7637-2 Pulse 1 (load dump) and Pulse 3b (capacitive coupling noise). IC Role / Device Role: Primary front-end protection device mounted near connector to shunt surge energy before entering LDOs and microcontrollers. Use Value: Certified compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b ensures design acceptance for Tier-1 automotive qualification without additional external filtering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43A (Bourns) | Identical DO-214AA package, same VWM (36.8 V), VC = 60.5 V @ 10.4 A - 2% higher clamping voltage | Same ISO 7637-2 compliance; slightly higher clamping may reduce margin for 60 V-rated downstream components | Select SMBJ43A only if Bourns sourcing is required; verify 60.5 V clamping aligns with protected IC absolute maximum ratings. |
| 1.5SMC43A (ON Semiconductor) | Same electrical specs (VWM = 36.8 V, VC = 59.3 V), but in larger DO-214AB (SMC) package - 2.5× footprint area | Requires PCB layout change; better thermal dissipation (RθJA ≈ 40 °C/W) for high-duty-cycle surge environments | Choose 1.5SMC43A only when thermal budget is constrained and board space permits larger SMC footprint. |
Compared with SMBJ43A and 1.5SMC43A, the P6SMB43A offers identical clamping performance in the smallest DO-214AA footprint, making it optimal for space-constrained 36 V power rails where layout density and thermal management are balanced.
Availability
P6SMB43A is available at Aetrix Electronics and suitable for switching mode power supplies, AC-DC adapters, and industrial motor drives requiring stable component supply, consistent parametric performance, and automotive-grade surge immunity.
Supply support for P6SMB43A 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, and power devices since 1979.
The P6SMB43A belongs to TSC's P6SMB series of 600 W surface-mount TVS diodes, engineered specifically for high-reliability DC power line protection in automotive, industrial, and consumer power conversion applications.
FAQ
What is the polarity configuration of the P6SMB43A?
The P6SMB43A is a unidirectional TVS diode, with cathode marked by a band on the DO-214AA package. It conducts only during reverse overvoltage events - i.e., when the cathode is more positive than the anode - and blocks forward current up to 3.5 V. This configuration is confirmed in the device's electrical specifications table and mechanical marking diagram.
Does the P6SMB43A meet automotive surge standards?
Yes, the P6SMB43A explicitly meets ISO 7637-2 Pulse 1 (load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) requirements as stated in its FEATURES section. This certification is verified across the full P6SMB6.8(A)–P6SMB220(A) family and applies directly to the P6SMB43A variant.
What is the maximum clamping voltage of the P6SMB43A under surge conditions?
The P6SMB43A has a maximum clamping voltage (VC) of 59.3 V at 10.6 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured and guaranteed per the Electrical Specifications table and defines the upper voltage limit imposed on protected circuits during standardized surge events.
How does the P6SMB43A differ from the P6SMB43 (non-A) version?
The P6SMB43A has tighter VBR tolerance (40.9–45.2 V) versus P6SMB43 (38.7–47.3 V), resulting in more consistent clamping behavior. Its VWM is also higher (36.8 V vs. 34.8 V), providing greater margin against false triggering in noisy 36 V systems - a distinction clearly documented in the Electrical Specifications table.
Is the P6SMB43A RoHS and halogen-free compliant?
Yes, the P6SMB43A is RoHS compliant and halogen-free per IEC 61249-2-21, as confirmed in the FEATURES section. The molding compound meets UL 94V-0 flammability rating, and terminals are matte tin plated per J-STD-002 - all verified in the Mechanical Data and Compliance notes.
P6SMB43A 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):
- 36.8V
- Voltage - Breakdown (Min):
- 40.9V
- Voltage - Clamping (Max) @ Ipp:
- 59.3V
- Current - Peak Pulse (10/1000µs):
- 10.6A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
P6SMB43A FAQ
1.How can I place an order for P6SMB43A through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB43A 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 P6SMB43A reliable?
The price and inventory of P6SMB43A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB43A is usually 5 days.
3.What payment methods are accepted for P6SMB43A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB43A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB43A?
P6SMB43A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB43A 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 P6SMB43A?
For technical support, including P6SMB43A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB43A requirements.
6.How does Aetrix verify that P6SMB43A is sourced from the original manufacturer or authorized distributors?
All P6SMB43A 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 P6SMB43A meets industry standards.
7.What is the process for return or replacement of P6SMB43A?
All P6SMB43A units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB43A, 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 P6SMB43A part is unused and in its original packaging.
Return procedure for P6SMB43A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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