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Taiwan Semiconductor Corporation P6SMB22A
- Part No.:
- P6SMB22A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB22A.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,286
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Product details
Overview
P6SMB22A from Taiwan Semiconductor is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode with a standoff voltage of 18.8 V, breakdown voltage range of 20.9–23.1 V, and clamping voltage of 30.6 V at 20 A peak pulse current. It features glass-passivated junction, <1 µA reverse leakage at VWM, and sub-1 ps response time, designed for surge protection in DC power rails of switching mode power supplies and consumer displays.
For engineers reviewing the P6SMB22A datasheet, P6SMB22A pinout, P6SMB22A application, or P6SMB22A equivalent, key selection criteria include its DO-214AA (SMB) package compatibility, 150°C junction rating, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and unidirectional clamping behavior under 10/1000 µs transients.
Technical Context
The P6SMB22A operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its minimum breakdown voltage of 20.9 V at 1 mA test current. Its clamping action limits transient-induced overvoltage to ≤30.6 V at 20 A, dissipating up to 600 W non-repetitive peak pulse power per 10/1000 µs waveform while maintaining <1 µA leakage above 18.8 V.
Thermally, it exhibits RθJC = 10 °C/W and RθJA = 55 °C/W, enabling reliable operation from –55 °C to +150 °C. The device uses a single-die construction in a DO-214AA molded package with matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 18.8 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR (min/max) | 20.9 V / 23.1 V - Breakdown voltage range at 1 mA, defining turn-on threshold tolerance |
| VC @ IPPM | 30.6 V at 20 A - Clamped voltage during 10/1000 µs surge, limiting downstream circuit stress |
| PPPSM | 600 W - Peak pulse power handling capability under standardized transient waveform |
| IR @ VWM | <1 µA - Reverse leakage ensuring minimal standby power loss and signal integrity |
| TJ max | +150 °C - Maximum junction temperature supporting high-ambient industrial deployments |
| Response time | <1.0 ps - Enables suppression of fast-rising ESD and lightning-induced transients |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, single-ended unidirectional configuration with cathode band marking. Dimensions conform to JEDEC DO-214AA standard; weight ≈ 0.090 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to protected circuit ground or low-side rail during clamping |
| Cathode | Reverse-biased terminal / surge input node | Connected to line being protected (e.g., DC input rail); marked with band |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity |
| ISO 7637-2 compliance | Validated for automotive-level load dump and inductive switching transients (Pulse 1/2a/2b/3a/3b) |
| Moisture sensitivity level 1 | Enables standard SMT reflow without baking; compatible with automated placement |
| UL 94V-0 molding compound | Provides flame-retardant housing meeting safety standards for enclosed power electronics |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and environmental directives for green manufacturing |
Applications
| Switching Mode Power Supply (SMPS) | AC-DC Adapter |
|---|---|
Use Scenario: Protection of primary-side DC bus against inductive kickback and line surges in offline flyback converters. IC Role / Device Role / Timing Role: Unidirectional TVS placed across bulk capacitor or rectifier output to clamp transients before they reach controller ICs. Use Value: Limits voltage spikes to ≤30.6 V, preventing overvoltage damage to PWM controllers and MOSFET gate drivers rated for 36 V max. | Use Scenario: Input-stage surge suppression in compact wall-mounted AC-DC adapters for consumer electronics. IC Role / Device Role / Timing Role: Standoff-rated TVS on secondary-side 12–24 V output rail to absorb coupling noise and ESD events. Use Value: Maintains <1 µA leakage at 18.8 V, avoiding unnecessary standby current drain while delivering 600 W transient immunity. |
| Television Power Board | Monitor Backlight Inverter |
Use Scenario: DC input rail protection in LED-backlit TV mainboards exposed to hot-swap and cable discharge events. IC Role / Device Role / Timing Role: Primary-line TVS between bridge rectifier and PFC stage to absorb 10/1000 µs surges per IEC 61000-4-5. Use Value: Sub-1 ps response ensures clamping initiates before sensitive APUs or memory interfaces experience overstress. | Use Scenario: Output rail protection in CCFL or LED backlight inverters where transformer leakage induces voltage spikes. IC Role / Device Role / Timing Role: Clamp diode across inverter output to limit reflected transients reaching display timing controller (TCON) ICs. Use Value: 30.6 V clamping voltage aligns with typical TCON absolute maximum ratings (≤33 V), preventing latch-up or gate oxide failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22A | Same DO-214AA package, identical VWM/VBR/VC specs, but manufactured by Vishay; RθJA = 50 °C/W vs. 55 °C/W | No functional difference in SMPS or adapter use; slightly better thermal performance in high-density layouts | Select SMBJ22A if board-level thermal margin is constrained and tighter RθJA is required |
| 1.5SMC22A | Larger DO-214AB (SMC) package; same electrical specs but higher PPPSM = 1500 W and RθJA = 35 °C/W | Requires PCB footprint change; suited for higher-energy surges where 600 W is marginal | Choose 1.5SMC22A only when system-level testing shows repeated 600 W clamping leads to thermal derating or failure |
Compared with SMBJ22A and 1.5SMC22A, the P6SMB22A offers optimal balance of compact DO-214AA footprint, certified ISO 7637-2 immunity, and cost-effective 600 W surge handling-making it ideal for space-constrained consumer power designs where full 1500 W rating is unnecessary.
Availability
P6SMB22A is available at Aetrix Electronics and suitable for switching mode power supplies, AC-DC adapters, and television power boards requiring stable component supply and consistent surge immunity performance across production batches.
Supply support for P6SMB22A 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 P6SMB series belongs to TSC's industrial-grade surface-mount TVS portfolio, engineered specifically for robust transient suppression in cost-sensitive consumer and computing power systems with strict RoHS and halogen-free requirements.
FAQ
What is the polarity configuration of the P6SMB22A?
The P6SMB22A is a unidirectional TVS diode, meaning it conducts only in reverse bias above its breakdown voltage. Its cathode is marked with a band on the DO-214AA package body, and it must be oriented with cathode toward the protected line and anode to ground or return path. This configuration provides asymmetrical clamping optimized for DC rail protection.
Does the P6SMB22A meet automotive transient standards?
Yes, the P6SMB22A meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements for 12 V automotive electrical systems. Its 600 W peak pulse power rating and sub-1 ps response time ensure effective suppression of load dump, inductive switching, and coupled noise transients without requiring additional external filtering components in qualified designs.
What is the maximum clamping voltage of the P6SMB22A under surge conditions?
The maximum clamping voltage of the P6SMB22A is 30.6 V when subjected to a 20 A peak pulse current with a 10/1000 µs waveform. This value is measured at the device terminals and represents the upper bound of voltage seen by downstream circuitry during worst-case transient events, enabling accurate overvoltage margin analysis for connected ICs.
Can the P6SMB22A be used in bidirectional applications?
No-the P6SMB22A is unidirectional only. For bidirectional transient suppression, Taiwan Semiconductor offers the P6SMB22CA variant (with "CA" suffix), which provides symmetrical clamping in both polarities. Using the P6SMB22A in AC-coupled or bipolar signal paths will result in forward conduction and potential failure due to lack of reverse blocking capability.
What is the thermal resistance from junction to ambient for the P6SMB22A?
The P6SMB22A has a junction-to-ambient thermal resistance (RθJA) of 55 °C/W under standard JEDEC test conditions (single device on 1-inch² copper pad). This value assumes no additional heatsinking; actual board-level RθJA may improve with larger copper areas or thermal vias, but must be validated per layout to ensure TJ remains ≤150 °C under worst-case surge repetition.
P6SMB22A 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):
- 18.8V
- Voltage - Breakdown (Min):
- 20.9V
- Voltage - Clamping (Max) @ Ipp:
- 30.6V
- Current - Peak Pulse (10/1000µs):
- 20A
- 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)
P6SMB22A FAQ
1.How can I place an order for P6SMB22A through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB22A 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 P6SMB22A reliable?
The price and inventory of P6SMB22A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB22A is usually 5 days.
3.What payment methods are accepted for P6SMB22A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB22A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB22A?
P6SMB22A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB22A 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 P6SMB22A?
For technical support, including P6SMB22A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB22A requirements.
6.How does Aetrix verify that P6SMB22A is sourced from the original manufacturer or authorized distributors?
All P6SMB22A 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 P6SMB22A meets industry standards.
7.What is the process for return or replacement of P6SMB22A?
All P6SMB22A units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB22A, 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 P6SMB22A part is unused and in its original packaging.
Return procedure for P6SMB22A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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