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Taiwan Semiconductor Corporation P6SMB33
- Part No.:
- P6SMB33
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB33.pdf
- Description:
- 600W, 33V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:5,900
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Product details
Overview
P6SMB33 from Taiwan Semiconductor is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, with breakdown voltage 29.7–36.3 V, stand-off voltage 26.8 V, and clamping voltage 47.7 V at 13.0 A peak pulse current. It protects DC power rails in switching mode power supplies and consumer displays against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the P6SMB33 datasheet, P6SMB33 pinout, P6SMB33 application, or P6SMB33 equivalent, key selection criteria include its 600W peak pulse power rating, 1.0 mA test current for VBR, <1 µA reverse leakage at VWM, 10 °C/W junction-to-case thermal resistance, and compliance with J-STD-020 moisture sensitivity level 1.
Technical Context
The P6SMB33 operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its specified breakdown range (29.7–36.3 V). Its glass-passivated junction ensures stable clamping performance and low leakage (<1 µA at 26.8 V), while fast response time (<1.0 ps) enables suppression of nanosecond-scale transients.
Thermally, it supports continuous operation from –55 °C to +150 °C with RθJC = 10 °C/W and RθJA = 55 °C/W. It meets ISO 7637-2 for automotive load-dump and inductive-switching immunity, and is rated for 100 A non-repetitive forward surge (8.3 ms half-sine).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 29.7 V / 36.3 V - defines reliable conduction onset under transient stress |
| VWM | 26.8 V - maximum continuous reverse operating voltage before leakage rises |
| VC@IPPM | 47.7 V at 13.0 A - clamped voltage during worst-case 10/1000 µs surge |
| PPPSM | 600 W - peak pulse power handling per single 10/1000 µs waveform |
| IR @ VWM | <1 µA - ensures minimal standby power loss in high-impedance circuits |
| TJ max | +150 °C - enables use in thermally constrained PCB layouts near power stages |
| Package | DO-214AA (SMB) - industry-standard surface-mount outline compatible with automated assembly |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with matte tin-plated leads, polarity indicated by cathode band; weight ≈ 0.090 g; UL 94V-0 rated molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current path / low-side reference | Connected to circuit ground or return path during transient clamp |
| Cathode | Protected line input / high-side connection | Connected to the line being protected (e.g., +12 V rail); cathode band marks this terminal |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures long-term stability of VBR and low parametric drift over temperature and life |
| Clamping ratio (VC/VBR) | ~1.35 - tight ratio minimizes overvoltage stress on downstream ICs during clamping |
| Moisture sensitivity level 1 | Enables standard SMT reflow without baking or special handling |
| ISO 7637-2 compliance | Validated for automotive-grade transient immunity (Pulse 1/2a/2b/3a/3b) |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing |
Applications
| Switching Mode Power Supply (SMPS) | AC-DC Adapter |
|---|---|
Use Scenario: Input rectifier output or secondary-side DC bus in offline SMPS designs subject to line surges and MOSFET switching noise. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed across bulk capacitor or post-regulator rail to clamp ESD and ringback transients. Use Value: Limits voltage excursions to ≤47.7 V during 600 W surges, protecting PWM controllers and optocouplers rated for ≤60 V absolute maximum. | Use Scenario: DC output stage of universal-input wall adapters powering consumer electronics. IC Role / Device Role / Timing Role: Secondary-side transient protector between output connector and load, absorbing hot-plug and cable-discharge events. Use Value: Withstand 13.0 A peak pulse at 10/1000 µs while maintaining <1 µA leakage at 26.8 V, preserving no-load efficiency and regulation accuracy. |
| Television Power Board | Monitor Backlight Inverter |
Use Scenario: 24 V or 36 V auxiliary supply rail in LED-backlit TV mainboards exposed to relay bounce and fan motor commutation noise. IC Role / Device Role / Timing Role: Standoff-rated TVS on logic-supply rail feeding microcontrollers and EEPROMs. Use Value: Clamps transients within 1 ps to prevent latch-up or bit-flip in 3.3 V/5 V logic powered from regulated 26.8 V nominal rail. | Use Scenario: High-voltage boost converter output (30–40 V range) driving CCFL or early LED backlight strings. IC Role / Device Role / Timing Role: Overvoltage clamp on inverter output to protect driver FETs and feedback sensing networks. Use Value: Matches typical inverter open-circuit voltage (≈33 V) with 29.7–36.3 V VBR, ensuring robust triggering without false trips during normal startup overshoot. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33A | Bidirectional variant; VBR = 36.7–40.6 V; VC = 53.3 V @ 11.2 A; same SMB package | Required where AC-coupled or bidirectional signal lines need protection (e.g., RS-485, CAN bus) | Select P6SMB33 for unidirectional DC rails; choose SMBJ33A only if bipolar symmetry is needed. |
| 1.5SMC33A | Higher power (1500 W); larger DO-214AB (SMC) package; VBR = 35.1–38.8 V; VC = 53.3 V @ 28.1 A | Suitable for higher-energy transients (e.g., industrial motor drives, PoE injectors) | P6SMB33 fits space-constrained SMB footprints; 1.5SMC33A requires PCB redesign but offers 2.5× pulse energy margin. |
Compared with SMBJ33A and 1.5SMC33A, the P6SMB33 provides optimal balance of 600 W surge capability, compact SMB footprint, and precise 26.8 V standoff-ideal for cost-sensitive, space-limited DC power protection where unidirectional clamping suffices.
Availability
P6SMB33 is available at Aetrix Electronics and suitable for switching mode power supplies, AC-DC adapters, and television power boards requiring stable component supply and automotive-grade transient immunity.
Supply support for P6SMB33 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, serving global power management and protection markets since 1979.
The P6SMB33 belongs to TSC's P6SMBx series of 600 W SMB-packaged TVS diodes, engineered specifically for high-reliability DC rail protection in consumer, computing, and automotive auxiliary systems.
FAQ
What is the polarity configuration of the P6SMB33?
The P6SMB33 is a unidirectional TVS diode, with cathode marked by a band on the DO-214AA (SMB) package body. It conducts only when reverse-biased beyond its breakdown voltage (29.7–36.3 V), making it suitable for DC line protection where polarity is fixed. The P6SMB33 does not conduct in forward bias except during surge events exceeding its 3.5 V forward voltage rating at 50 A.
Does the P6SMB33 meet automotive transient standards?
Yes, the P6SMB33 meets ISO 7637-2 requirements for Pulse 1 (inductive load disconnect), Pulse 2a (sudden load dump), Pulse 2b (supply interruption), and Pulses 3a/3b (capacitive coupling and line impedance effects). This validation is explicitly stated in the official Taiwan Semiconductor datasheet Version Q2209 for the P6SMB33.
What is the maximum clamping voltage of the P6SMB33 under surge conditions?
The maximum clamping voltage (VC) of the P6SMB33 is 47.7 V, measured at 13.0 A peak pulse current using the standardized 10/1000 µs waveform. This value represents the upper limit of voltage seen by downstream circuitry during worst-case transient events, and is confirmed in the Electrical Specifications table for P6SMB33 on page 2 of the Q2209 datasheet.
Can the P6SMB33 be used in bidirectional signal lines?
No, the P6SMB33 is unidirectional and unsuitable for bidirectional signal lines such as RS-485 or CAN. For those applications, use the bidirectional SMBJ33A variant instead. The P6SMB33 conducts only in reverse bias above 29.7 V and blocks forward current up to 3.5 V; applying significant reverse voltage to a bidirectional line would cause unintended conduction in one direction only.
What is the thermal resistance profile of the P6SMB33?
The P6SMB33 has a junction-to-case thermal resistance (RθJC) of 10 °C/W and junction-to-ambient resistance (RθJA) of 55 °C/W, measured under standard JEDEC conditions. These values enable reliable operation at full 600 W pulse power when mounted on 1-in² copper area, and confirm suitability for ambient temperatures up to +150 °C in thermally managed designs.
P6SMB33 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):
- 26.8V
- Voltage - Breakdown (Min):
- 29.7V
- Voltage - Clamping (Max) @ Ipp:
- 47.7V
- Current - Peak Pulse (10/1000µs):
- 13A
- 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)
P6SMB33 FAQ
1.How can I place an order for P6SMB33 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB33 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 P6SMB33 reliable?
The price and inventory of P6SMB33 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB33 is usually 5 days.
3.What payment methods are accepted for P6SMB33?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB33 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB33?
P6SMB33 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB33 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 P6SMB33?
For technical support, including P6SMB33 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB33 requirements.
6.How does Aetrix verify that P6SMB33 is sourced from the original manufacturer or authorized distributors?
All P6SMB33 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 P6SMB33 meets industry standards.
7.What is the process for return or replacement of P6SMB33?
All P6SMB33 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB33, 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 P6SMB33 part is unused and in its original packaging.
Return procedure for P6SMB33:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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