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Taiwan Semiconductor Corporation P6SMB68C
- Part No.:
- P6SMB68C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB68C.pdf
- Description:
- 600W, 68V, 10%, BIDIRECTIONAL, T
- Quantity:
- Payment:
- Shipping:
Inventory:8,043
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Product details
Overview
P6SMB68C from Taiwan Semiconductor is a bidirectional 600W surface-mount transient voltage suppressor (TVS) diode designed for robust overvoltage protection in DC power rails and signal lines. It features a standoff voltage of 55.1 V, breakdown voltage range of 61.2–74.8 V at 1 mA, clamping voltage of 98.0 V at 6.4 A peak pulse current, and operates across –55°C to +150°C junction temperature. It is used in switching mode power supplies to protect downstream regulators from load dump or inductive switching transients.
For engineers reviewing the P6SMB68C datasheet, P6SMB68C pinout, P6SMB68C application, or P6SMB68C equivalent, key selection criteria include unidirectional/bidirectional configuration (C = bidirectional), DO-214AA (SMB) package compatibility, 600W 10/1000μs surge rating, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and low leakage (<1 μA @ 55.1 V).
Technical Context
The P6SMB68C implements a silicon avalanche diode structure with glass-passivated junction, enabling fast response (<1.0 ps rise time from 0 V to VBR min) and stable clamping under repetitive or single-event transients. Its bidirectional configuration allows symmetrical suppression of both positive and negative polarity surges without external polarity management.
Thermal performance is defined by RθJC = 10°C/W and RθJA = 55°C/W, supporting reliable operation at up to 150°C junction temperature. It meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1, ensuring suitability for lead-free reflow assembly and long-term reliability in industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 55.1 V - Maximum continuous reverse working voltage before significant leakage begins; defines safe operating DC bias margin. |
| VBR (min/max) | 61.2 V / 74.8 V at IT = 1 mA - Breakdown voltage window ensures consistent clamping onset across production lots. |
| VC @ IPPM | 98.0 V at 6.4 A (10/1000μs) - Clamping voltage limits maximum stress on protected ICs during surge events. |
| PPPSM | 600 W - Peak pulse power rating per 10/1000μs waveform; determines survivability against automotive load-dump or EFT bursts. |
| IR @ VWM | <1 μA - Ultra-low reverse leakage preserves efficiency in high-impedance or battery-backed circuits. |
| TJ max | +150°C - Enables deployment in under-hood automotive or enclosed industrial power modules without derating. |
| Package | DO-214AA (SMB) - Standardized surface-mount outline with 0.090 g mass, UL 94V-0 molding, and matte tin-plated leads. |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with cathode band marking; dual axial terminals; RoHS-compliant, halogen-free construction; moisture sensitivity level 1; weight ≈ 0.090 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Current entry point in forward conduction; reference node for bidirectional clamping | Terminal conducts during negative transients; symmetric with cathode for bipolar operation. |
| Cathode (banded end) | Current exit point in forward conduction; polarity marker | Band identifies terminal; enables visual orientation during automated placement and manual inspection. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure. |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Validated for automotive electronics protection against battery line disturbances including load dump and coupled noise. |
| Fast response time <1.0 ps | Clamps transients before sensitive logic or analog circuitry can be damaged, critical for high-speed digital interfaces. |
| Low-profile SMB package | Enables high-density PCB layouts and compatibility with standard SMT pick-and-place equipment and reflow profiles. |
| Matte tin-plated leads | Guarantees solderability per J-STD-002 and eliminates whisker growth risk per JESD201 Class 2. |
Applications
| Automotive Power Rail Protection | Industrial SMPS Input Stage |
|---|---|
|
Use Scenario: Protecting 12 V/24 V vehicle ECUs from load dump pulses (ISO 7637-2 Pulse 5a) and alternator overshoot. IC Role / Device Role / Timing Role: Bidirectional clamping device placed across main power input to limit rail voltage excursion to ≤98.0 V. Use Value: Prevents latch-up or permanent damage to microcontrollers and CAN transceivers during 100 V+ transients. |
Use Scenario: Safeguarding AC-DC converter primary-side rectifier outputs and secondary-side DC bus rails. IC Role / Device Role / Timing Role: Transient shunt connected in parallel with bulk capacitors to absorb energy from inductive kickback or lightning-induced surges. Use Value: Maintains system uptime by preventing overvoltage shutdown or MOSFET avalanche failure during 600 W surge events. |
| Consumer Monitor Power Supply | Point-of-Sale Terminal DC Input |
|
Use Scenario: Securing internal 12 V or 19 V supply rails in LCD monitors against ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-leakage TVS placed immediately after input connector to clamp fast-rising transients before they reach DC-DC converters. Use Value: Eliminates field failures caused by <1 μA leakage-induced brownout or capacitor charging delay in standby mode. |
Use Scenario: Hardening 5 V/12 V DC input of retail kiosks and payment terminals against accidental AC mains coupling or hot-plug spikes. IC Role / Device Role / Timing Role: Bidirectional front-end protector mounted directly at barrel jack or terminal block to divert surge energy to chassis ground. Use Value: Reduces warranty returns by limiting transient-induced reset loops or USB controller lockup in unattended deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ68CA (Bourns) | Same DO-214AA package, identical 68 V nominal breakdown, but VC = 110 V @ 6.1 A (vs. 98.0 V @ 6.4 A); higher clamping voltage reduces protection margin. | Less effective for low-voltage tolerant ICs (e.g., 3.3 V logic rails) due to elevated clamping; suitable where board space permits higher VC. | Select P6SMB68C when tighter clamping (98.0 V) is required to protect 5 V or lower systems without additional series impedance. |
| 1.5SMC68CA (ON Semiconductor) | Same 68 V bidirectional rating, but 1.5 kW peak power (1500 W) and larger DO-214AB (SMC) package; not footprint-compatible. | Used in higher-energy surge environments (e.g., outdoor PoE injectors); requires PCB redesign due to 7.11 mm × 6.22 mm vs. SMB's 4.57 mm × 3.94 mm footprint. | Choose P6SMB68C for space-constrained designs needing 600 W protection in standard SMB layout; use 1.5SMC68CA only if energy demand exceeds 600 W. |
Compared with SMBJ68CA and 1.5SMC68CA, the P6SMB68C delivers superior clamping performance in a compact SMB footprint-ideal for cost-sensitive, density-limited applications requiring precise 98.0 V voltage limiting without layout changes.
Availability
P6SMB68C is available at Aetrix Electronics and suitable for automotive power rail protection, industrial SMPS input stages, and consumer monitor power supplies requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for P6SMB68C 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 automotive markets.
The P6SMB68C belongs to TSC's P6SMBx family of 600 W SMB-packaged TVS diodes, engineered specifically for high-reliability transient suppression in space-constrained, thermally demanding applications such as automotive ECUs and industrial power supplies.
FAQ
What does the "C" suffix indicate in P6SMB68C?
The "C" suffix in P6SMB68C denotes bidirectional configuration-meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., P6SMB68A), the P6SMB68C has no inherent anode/cathode polarity in circuit operation and is marked with a single band indicating one terminal, while both ends function identically under reverse or forward surge conditions. This makes the P6SMB68C ideal for AC-coupled lines or DC rails where polarity reversal is possible.
What is the maximum clamping voltage of P6SMB68C and under what test condition?
The maximum clamping voltage of P6SMB68C is 98.0 V, measured at a peak pulse current (IPPM) of 6.4 A using the standardized 10/1000 μs double-exponential surge waveform. This value represents the upper limit of voltage seen across the device during worst-case transient events and is critical for ensuring downstream components remain within their absolute maximum ratings. The P6SMB68C achieves this clamping performance while maintaining low leakage (<1 μA) at its 55.1 V standoff voltage.
Is P6SMB68C compliant with automotive surge standards?
Yes, P6SMB68C is explicitly rated to meet ISO 7637-2 for automotive transient immunity, covering Pulse 1 (inductive load disconnect), Pulse 2a (sudden load removal), Pulse 2b (supply interruption), Pulse 3a (capacitive coupled noise), and Pulse 3b (ground bounce). Its 600 W peak pulse power rating, fast <1.0 ps response, and guaranteed clamping behavior under these waveforms make it suitable for protecting ECUs, body control modules, and infotainment systems in passenger vehicles and commercial fleets.
Can P6SMB68C be used in place of P6SMB68A?
No-P6SMB68C and P6SMB68A are not interchangeable without circuit review. P6SMB68A is unidirectional (anode/cathode asymmetric), while P6SMB68C is bidirectional (symmetric clamping). Substituting P6SMB68C for P6SMB68A may cause unintended conduction in DC-biased circuits or fail to suppress negative transients if polarity is misapplied. Always verify schematic polarity, grounding scheme, and transient directionality before replacement. The P6SMB68C must be used only where bidirectional protection is intentionally designed.
What is the thermal resistance profile of P6SMB68C and how does it affect PCB layout?
P6SMB68C has a junction-to-case thermal resistance (RθJC) of 10°C/W and junction-to-ambient resistance (RθJA) of 55°C/W under standard JEDEC test conditions. To maintain TJ ≤ 150°C during repeated surges, PCB layout must provide adequate copper area-minimum 100 mm² of 2 oz. copper connected to both terminals-to dissipate heat. Avoid narrow traces or isolated pads; thermal vias under the cathode/anode pads significantly improve RθJA. The P6SMB68C's low RθJC enables efficient heat transfer to heatsinking planes when properly implemented.
P6SMB68C 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 55.1V
- Voltage - Breakdown (Min):
- 61.2V
- Voltage - Clamping (Max) @ Ipp:
- 98V
- Current - Peak Pulse (10/1000µs):
- 6.4A
- 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)
P6SMB68C FAQ
1.How can I place an order for P6SMB68C through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB68C 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 P6SMB68C reliable?
The price and inventory of P6SMB68C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB68C is usually 5 days.
3.What payment methods are accepted for P6SMB68C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB68C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB68C?
P6SMB68C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB68C 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 P6SMB68C?
For technical support, including P6SMB68C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB68C requirements.
6.How does Aetrix verify that P6SMB68C is sourced from the original manufacturer or authorized distributors?
All P6SMB68C 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 P6SMB68C meets industry standards.
7.What is the process for return or replacement of P6SMB68C?
All P6SMB68C units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB68C, 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 P6SMB68C part is unused and in its original packaging.
Return procedure for P6SMB68C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB68C Tags
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