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Taiwan Semiconductor Corporation P6SMB33A
- Part No.:
- P6SMB33A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB33A.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
P6SMB33A from Taiwan Semiconductor is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode with a standoff voltage of 28.2 V, breakdown voltage range 31.4–34.7 V, and clamping voltage of 45.7 V at 13.8 A peak pulse current. It protects DC power rails in switching mode power supplies, adapters, and display electronics against ESD and surge events per ISO 7637-2 Pulse 1/2a/2b/3a/3b.
For engineers reviewing the P6SMB33A datasheet, P6SMB33A pinout, P6SMB33A application, or P6SMB33A equivalent, key selection criteria include its DO-214AA (SMB) package compatibility, 1 μA max reverse leakage at VWM, 1.0 ps typical response time, and suitability for automotive-grade transient suppression where clamping performance and thermal robustness (RθJA = 55 °C/W) are critical.
Technical Context
The P6SMB33A operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its minimum breakdown voltage (31.4 V), diverting surge current to ground while clamping the protected line to ≤45.7 V. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1 μA at 28.2 V).
Designed for 10/1000 μs surge waveforms, it delivers 600 W non-repetitive peak pulse power with thermal derating above 25 °C (RθJC = 10 °C/W, RθJA = 55 °C/W). It meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28.2 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR (min/max) | 31.4 V / 34.7 V - Breakdown voltage range at 1.0 mA test current; defines turn-on threshold tolerance |
| VC @ IPPM | 45.7 V at 13.8 A - Clamped voltage during 10/1000 μs surge; determines maximum stress on downstream ICs |
| PPPSM | 600 W - Peak pulse power handling capability under standardized surge waveform |
| IR @ VWM | <1 μA - Reverse leakage current at standoff voltage; ensures minimal standby power loss |
| TJ max | 150 °C - Maximum junction temperature; supports operation in high-ambient industrial environments |
| Response time | <1.0 ps - Time from 0 V to VBR(min); enables protection against fast ESD transients |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, single-diode configuration with cathode band marking. Matte tin-plated leads, RoHS and halogen-free compliant, UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side (cathode-banded end is cathode) | Connected to protected circuit node; reverse-biased during normal operation |
| Cathode | Ground reference / surge return path | Connected to system ground or low-impedance return; carries full surge current during clamping |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMB package | Enables automated SMT placement and fits space-constrained PCB layouts (typical footprint: 4.5 × 3.9 mm) |
| Glass-passivated junction | Ensures long-term stability of VBR, low parameter drift over temperature and life cycle |
| ISO 7637-2 compliance | Validated for automotive load-dump and inductive-switching surge immunity (Pulse 1/2a/2b/3a/3b) |
| Fast 1.0 ps response | Protects sensitive logic and analog inputs against sub-nanosecond ESD events without signal distortion |
| Moisture sensitivity level 1 | Eliminates need for dry-packaging or baking prior to reflow; supports standard assembly flow |
Applications
| Switching Mode Power Supply (SMPS) | AC-DC Adapters |
|---|---|
Use Scenario: Input rectifier output rail in offline flyback or forward converters exposed to line surges and coupling transients. IC Role / Device Role: Unidirectional TVS placed between bulk capacitor positive terminal and ground to clamp differential-mode surges. Use Value: Limits transient voltage to ≤45.7 V, preventing overvoltage damage to PWM controller ICs and optocouplers rated for ≤60 V absolute maximum. | Use Scenario: Secondary-side DC output lines in universal-input wall adapters subject to ESD and load-dump coupling. IC Role / Device Role: Output rail protector mounted adjacent to USB or barrel-jack connector to suppress contact discharge. Use Value: Withstands 13.8 A peak pulse current while holding output voltage below 45.7 V, preserving regulation integrity and preventing brownout resets. |
| Television Power Boards | Monitor Backlight Drivers |
Use Scenario: Main 12 V/24 V power distribution bus feeding audio amplifiers, tuners, and HDMI interface ICs. IC Role / Device Role: Point-of-load TVS on main DC bus near connector entry point to absorb coupled transients from external cables. Use Value: 600 W surge rating handles repetitive 10/1000 μs pulses common in broadcast environments; 1 μA leakage avoids standby current penalty. | Use Scenario: Boost converter output rail supplying CCFL or LED backlight strings in LCD monitors. IC Role / Device Role: Clamp device across boost output capacitor to suppress inductive kickback from open-circuit lamp faults. Use Value: 45.7 V clamping voltage aligns with typical 50 V-rated MOSFETs and driver ICs, avoiding destructive overvoltage during fault conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33A (Bourns) | Identical DO-214AA package, same VWM (28.2 V), VC = 45.7 V, but rated for 600 W with tighter VBR tolerance (±3.5% vs ±5% for P6SMB33A) | Preferred in high-volume automotive modules requiring tighter parametric consistency across temperature | Select SMBJ33A when VBR stability over -40 °C to +125 °C is prioritized over cost |
| 1.5SMC33A (ON Semiconductor) | Same electrical specs (VWM = 28.2 V, VC = 45.7 V, PPPSM = 600 W), but in larger DO-214AB (SMC) package (7.1 × 6.2 mm vs 4.5 × 3.9 mm) | Used where board space allows larger footprint and higher thermal mass improves long-pulse energy handling | Choose 1.5SMC33A only if PCB layout accommodates SMC and enhanced thermal dissipation is required for repeated surge events |
Compared with SMBJ33A and 1.5SMC33A, the P6SMB33A offers optimal balance of compact SMB footprint, ISO 7637-2 compliance, and cost efficiency for consumer and industrial power supply designs where strict VBR binning or extreme thermal margin is not required.
Availability
P6SMB33A is available at Aetrix Electronics and suitable for switching mode power supplies, AC-DC adapters, and television power boards requiring stable component supply with full traceability and lifecycle management.
Supply support for P6SMB33A 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, rectifiers, and MOSFETs for industrial, computing, and consumer markets.
The P6SMB33A belongs to TSC's P6SMB series of 600 W SMB-packaged TVS diodes, engineered specifically for cost-sensitive, high-reliability DC rail protection in automotive-compliant and CE-marked power systems.
FAQ
What is the polarity configuration of the P6SMB33A?
The P6SMB33A is a unidirectional TVS diode, with the cathode identified by a band on the DO-214AA (SMB) package body. It conducts only during reverse overvoltage events-forward voltage drop is 3.5 V at 50 A per datasheet Note 2-and must be oriented with cathode toward ground to protect positive-rail circuits. This polarity ensures proper clamping behavior in DC power applications.
Does the P6SMB33A meet automotive surge immunity standards?
Yes, the P6SMB33A meets ISO 7637-2 requirements for Pulse 1 (inductive load disconnect), Pulse 2a (sudden load removal), Pulse 2b (supply interruption), Pulse 3a (capacitive coupling), and Pulse 3b (ground noise), making it suitable for 12 V and 24 V automotive subsystems such as infotainment power supplies and display controllers where transient robustness is mandated.
What is the maximum clamping voltage of the P6SMB33A under surge conditions?
The maximum clamping voltage of the P6SMB33A is 45.7 V at 13.8 A peak pulse current (IPPM) under the standardized 10/1000 μs waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during transient events, ensuring compatibility with 50 V-rated downstream components.
Can the P6SMB33A be used in bidirectional configurations?
No-the P6SMB33A is unidirectional only. For bidirectional transient suppression, Taiwan Semiconductor specifies the P6SMB33CA variant (with "CA" suffix), which features symmetrical breakdown in both directions. Using the P6SMB33A in reverse-biased AC applications risks forward conduction and failure; always verify suffix and marking code (LTJ for P6SMB33A) before placement.
What is the thermal resistance profile of the P6SMB33A?
The P6SMB33A has a junction-to-case thermal resistance (RθJC) of 10 °C/W and junction-to-ambient resistance (RθJA) of 55 °C/W at standard mounting conditions. These values enable reliable operation up to 150 °C junction temperature, supporting use in enclosed power supplies where ambient temperatures reach 85 °C-provided adequate copper area (≥25 mm² per pad) is used for heatsinking.
P6SMB33A 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):
- 28.2V
- Voltage - Breakdown (Min):
- 31.4V
- Voltage - Clamping (Max) @ Ipp:
- 45.7V
- Current - Peak Pulse (10/1000µs):
- 13.8A
- 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)
P6SMB33A FAQ
1.How can I place an order for P6SMB33A through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB33A 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 P6SMB33A reliable?
The price and inventory of P6SMB33A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB33A is usually 5 days.
3.What payment methods are accepted for P6SMB33A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB33A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB33A?
P6SMB33A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB33A 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 P6SMB33A?
For technical support, including P6SMB33A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB33A requirements.
6.How does Aetrix verify that P6SMB33A is sourced from the original manufacturer or authorized distributors?
All P6SMB33A 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 P6SMB33A meets industry standards.
7.What is the process for return or replacement of P6SMB33A?
All P6SMB33A units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB33A, 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 P6SMB33A part is unused and in its original packaging.
Return procedure for P6SMB33A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB33A Tags
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