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Taiwan Semiconductor Corporation P6SMB68A
- Part No.:
- P6SMB68A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB68A.pdf
- Description:
- TVS DIODE 58.1VWM 92VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,791
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Product details
Overview
P6SMB68A from Taiwan Semiconductor is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode with a standoff voltage of 58.1V, breakdown voltage range 64.6–71.4V, and clamping voltage of 92.0V at 6.8A 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.
For engineers reviewing the P6SMB68A datasheet, P6SMB68A pinout, P6SMB68A application, or P6SMB68A equivalent, key selection criteria include its DO-214AA (SMB) package, 1.0mA test current, <1μA leakage at VWM, 10°C/W junction-to-case thermal resistance, and compliance with automotive pulse immunity standards.
Technical Context
The P6SMB68A operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its specified VBR min (64.6V), clamping transients to ≤92.0V within <1.0ps. Its glass-passivated junction ensures stable breakdown and low leakage (<1μA at 58.1V).
Designed for PCB-level surge protection, it handles 600W non-repetitive 10/1000μs pulses, supports 100A forward surge current, and maintains operation across –55°C to +150°C junction temperature with UL 94V-0 molding compound and JESD201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 58.1 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR (min/max) | 64.6 V / 71.4 V - Breakdown voltage range at 1.0 mA test current; defines turn-on threshold tolerance |
| VC @ IPPM | 92.0 V at 6.8 A - Clamped voltage during 10/1000μs surge; determines protected circuit's maximum stress level |
| PPPSM | 600 W - Peak pulse power handling capability for single-event transients |
| IR @ VWM | <1 μA - Reverse leakage at standoff voltage; critical for low-power standby circuits |
| TJ max | +150 °C - Maximum junction temperature; enables use in high-ambient industrial and automotive environments |
| RθJC | 10 °C/W - Junction-to-case thermal resistance; informs heatsinking requirements for repeated surge duty |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, cathode-banded unidirectional configuration. Case meets UL 94V-0 flammability rating; matte tin-plated leads comply with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or lower-potential rail in unidirectional TVS configuration |
| Cathode (banded end) | Reverse-biased clamping terminal | Connected to protected line (e.g., 48V input); conducts avalanche current during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| Fast response time | <1.0 ps - Enables clamping before sensitive downstream ICs experience overstress |
| Glass passivated junction | Stable VBR and low leakage over life - Ensures long-term reliability in harsh thermal cycling environments |
| ISO 7637-2 compliance | Pulse 1/2a/2b/3a/3b immunity - Validated for automotive power-line transient suppression without external filtering |
| Moisture sensitivity level | Level 1 (J-STD-020) - No bake requirement prior to reflow; supports standard SMT assembly |
| Halogen-free construction | IEC 61249-2-21 compliant - Meets environmental regulations for RoHS-compliant industrial and consumer products |
Applications
| Switching Mode Power Supply (SMPS) | AC-DC Adapter |
|---|---|
Use Scenario: Input rectifier stage of 48V telecom SMPS exposed to lightning-induced surges on AC mains or DC distribution lines. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed across bulk capacitor or after bridge rectifier to limit transient voltage to safe levels. Use Value: Clamps 600W 10/1000μs surges to ≤92.0V, protecting MOSFETs and PWM controllers rated for 100V drain-source breakdown. | Use Scenario: Secondary-side 12V output rail of wall-mounted adapter subject to load-dump and ESD events during plug insertion. IC Role / Device Role / Timing Role: Output-side TVS connected between VOUT and GND to suppress fast-rising transients before reaching USB-PD or LDO regulators. Use Value: Sub-1μA leakage at 58.1V avoids quiescent current penalty; DO-214AA footprint fits tight adapter PCB layouts. |
| Television Power Board | Monitor Backlight Inverter |
Use Scenario: 24V auxiliary supply rail in LED-backlit TV main board, susceptible to coupling from internal switching noise and external ESD. IC Role / Device Role / Timing Role: Localized TVS mounted near DC-DC converter ICs to shunt high-frequency transients before they propagate to logic circuitry. Use Value: 92.0V clamping ensures microcontrollers and interface ICs (rated ≤100V) remain within absolute maximum ratings during surge events. | Use Scenario: High-voltage boost output (≈300V) of CCFL or LED backlight inverter subjected to open-circuit transients during lamp failure. IC Role / Device Role / Timing Role: TVS placed across transformer secondary or inverter output capacitor to clamp flyback spikes and prevent gate oxide damage in driver MOSFETs. Use Value: 64.6–71.4V VBR range allows precise coordination with overvoltage protection thresholds set at 75V in inverter control ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ68A | Same DO-214AA package, identical VWM/VBR/VC specs, but from STMicroelectronics; RθJC = 11°C/W vs. 10°C/W | No functional difference in clamping performance; minor thermal margin reduction under sustained surge conditions | Select SMBJ68A if dual-sourcing required and STMicroelectronics is preferred franchise distributor |
| 1.5SMC68A | Higher power rating (1500W), larger DO-214AB (SMC) package; same VBR range but 10× higher IPPM (64A vs. 6.8A) | Overqualified for 600W-level threats; requires larger PCB area and may exhibit higher parasitic inductance | Choose 1.5SMC68A only if system-level testing reveals need for >600W surge margin or legacy SMC footprint compatibility |
Compared with SMBJ68A and 1.5SMC68A, the P6SMB68A delivers optimal balance of 600W surge capability, compact DO-214AA footprint, and 10°C/W thermal resistance-making it ideal for space-constrained, thermally managed industrial and consumer power designs where exact 600W rating is validated.
Availability
P6SMB68A is available at Aetrix Electronics and suitable for switching mode power supplies, AC-DC adapters, and television power boards requiring stable component supply and ISO 7637-2-compliant transient protection.
Supply support for P6SMB68A 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 industrial, computing, and consumer markets since 1979.
The P6SMB68A belongs to TSC's P6SMB series of surface-mount TVS diodes, engineered specifically for cost-effective, high-reliability surge protection in space-constrained DC power interfaces across automotive, industrial, and display applications.
FAQ
What is the polarity configuration of the P6SMB68A?
The P6SMB68A is a unidirectional TVS diode with cathode indicated by a band on the DO-214AA package. It conducts in reverse bias above VBR and blocks up to 58.1V in forward direction. This configuration is used for DC line protection where polarity is fixed, unlike bidirectional variants (e.g., P6SMB68CA) that protect AC or floating signals. The P6SMB68A must be oriented with cathode toward the protected line.
How does the P6SMB68A meet ISO 7637-2 compliance?
The P6SMB68A is characterized and rated to withstand Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) waveforms defined in ISO 7637-2. Its 600W peak pulse power, 92.0V clamping voltage, and sub-1.0ps response ensure voltage excursions remain below thresholds that damage automotive ECUs. Test data per Fig.3 waveform confirms performance-no external components needed for basic compliance.
What is the maximum steady-state power dissipation of the P6SMB68A?
The P6SMB68A has a steady-state power dissipation (Ptot) of 3 W at TA = 25°C, derated linearly above that ambient temperature per Fig.2. This rating applies only to continuous DC or low-frequency reverse leakage-not transient suppression. Under normal operation at VWM = 58.1V, leakage is <1μA, resulting in <60μW static dissipation. The 3W rating matters only during abnormal sustained overvoltage conditions exceeding VBR.
Can the P6SMB68A be used in bidirectional signal lines?
No-the P6SMB68A is unidirectional and unsuitable for AC or bidirectional data lines. For such applications, use the bidirectional variant P6SMB68CA (same VBR range, symmetrical clamping in both directions). Attempting to use P6SMB68A on a bidirectional line risks forward conduction during negative half-cycles, causing malfunction or damage. Always match device polarity to system signal architecture.
What is the marking code for the P6SMB68A on the DO-214AA package?
The P6SMB68A is marked on the package with the code "MPJ", as specified in the Electrical Specifications table. This 3-character laser marking appears adjacent to the cathode band on the molded body. "MPJ" uniquely identifies the 64.6–71.4V breakdown variant within the P6SMB family and distinguishes it from the non-A version (P6SMB68, marked "MNJ") and other voltage grades.
P6SMB68A 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):
- 58.1V
- Voltage - Breakdown (Min):
- 64.6V
- Voltage - Clamping (Max) @ Ipp:
- 92V
- Current - Peak Pulse (10/1000µs):
- 6.8A
- 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)
P6SMB68A FAQ
1.How can I place an order for P6SMB68A through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB68A 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 P6SMB68A reliable?
The price and inventory of P6SMB68A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB68A is usually 5 days.
3.What payment methods are accepted for P6SMB68A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB68A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB68A?
P6SMB68A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB68A 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 P6SMB68A?
For technical support, including P6SMB68A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB68A requirements.
6.How does Aetrix verify that P6SMB68A is sourced from the original manufacturer or authorized distributors?
All P6SMB68A 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 P6SMB68A meets industry standards.
7.What is the process for return or replacement of P6SMB68A?
All P6SMB68A units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB68A, 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 P6SMB68A part is unused and in its original packaging.
Return procedure for P6SMB68A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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