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Taiwan Semiconductor Corporation P6SMB68CH
- Part No.:
- P6SMB68CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB68CH.pdf
- Description:
- 600W, 68V, 10%, BIDIRECTIONAL, T
- Quantity:
- Payment:
- Shipping:
Inventory:9,301
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Product details
Overview
P6SMB68CH from Taiwan Semiconductor is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode with a nominal breakdown voltage of 68 V, clamping voltage of 98 V at 6.4 A peak pulse current, and stand-off voltage of 55.1 V. It features AEC-Q101 qualification, glass passivated junction, and meets ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive load-dump and EFT immunity in power-line protection circuits.
For engineers reviewing the P6SMB68CH datasheet, P6SMB68CH pinout, P6SMB68CH application, or P6SMB68CH equivalent, key selection criteria include its DO-214AA (SMB) package compatibility, bidirectional capability when used with CH suffix variants, low leakage (<1 µA @ 55.1 V), and fast sub-1 ps response time critical for protecting CAN/LIN transceivers, MCU I/O, and automotive body control modules.
Technical Context
The P6SMB68CH operates as a unidirectional avalanche diode optimized for high-energy transient suppression in 12 V/24 V automotive and industrial DC systems. Its 600 W peak pulse power rating (10/1000 µs waveform), 150 °C maximum junction temperature, and 10 °C/W junction-to-case thermal resistance enable robust operation under repetitive surge stress without thermal runaway.
It delivers precise voltage clamping with a 61.2–74.8 V breakdown range (min/max at 1 mA), 0.104 %/°C temperature coefficient of VBR, and <1 µA reverse leakage at rated stand-off voltage - ensuring minimal standby power loss while maintaining tight overvoltage protection margins for sensitive downstream ICs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 61.2 V / 74.8 V at 1 mA - defines guaranteed clamping onset window for reliable overvoltage thresholding |
| VWM | 55.1 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 98 V at 6.4 A - actual clamped voltage during 600 W transient, limiting stress on protected ICs |
| IPPM | 6.4 A - peak pulse current supported under 10/1000 µs waveform, directly tied to system-level surge compliance |
| PPPSM | 600 W - non-repetitive surge energy handling capacity per ISO 7637-2 Pulse 5a requirements |
| TJ max | 150 °C - enables operation in under-hood automotive environments without derating below full power |
| RθJC | 10 °C/W - supports thermal design with minimal heatsinking for PCB-mounted applications |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002; polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 12 V rail or signal trace); conducts during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| Glass passivated junction | Ensures stable VBR and low leakage across humidity and thermal aging, critical for long-life deployments |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (EFT) immunity requirements |
| Moisture sensitivity level 1 | Enables standard SMT reflow without baking, reducing manufacturing overhead and moisture-related defects |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS directives for environmentally constrained supply chains |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Suppressing load-dump transients on 12 V battery-fed ECUs in passenger vehicles and commercial trucks. IC Role / Device Role: Primary clamping device placed between battery rail and input stage of power management IC or microcontroller. Use Value: Limits voltage excursion to ≤98 V during 600 W pulses, preventing latch-up or permanent damage to downstream 3.3 V/5 V logic. | Use Scenario: Protecting analog front-end inputs of pressure, temperature, or current sensors exposed to EFT noise in factory automation PLCs. IC Role / Device Role: Bidirectional transient shunt (when paired with matching CH variant) across sensor signal lines referenced to local ground. Use Value: Clamps fast-rising EFT bursts (IEC 61000-4-4) to <13.4 V, preserving ADC accuracy and avoiding false triggering in 24 V loop-powered systems. |
| Automotive Lighting Module Protection | DC Motor Drive Input Protection |
Use Scenario: Safeguarding LED driver ICs and MOSFET gate drivers in headlamp and tail lamp assemblies subject to alternator ripple and switching spikes. IC Role / Device Role: Unidirectional TVS placed across input capacitor on buck converter input stage. Use Value: Absorbs 10/1000 µs surges up to 600 W without degradation, maintaining >100,000-cycle lifetime under real-world road vibration and thermal cycling. | Use Scenario: Shielding H-bridge controller inputs from inductive kickback generated during brushed DC motor commutation in HVAC actuators and seat adjusters. IC Role / Device Role: Standoff-rated TVS connected between motor supply rail and logic-level enable/control pins. Use Value: Holds VWM at 55.1 V to avoid false shutdowns during normal 12 V operation while clamping 100 V+ spikes to 98 V within 1 ps. |
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, 68 V standoff, but 600 W rating with tighter VBR tolerance (64.6–71.4 V) and lower clamping voltage (92 V @ 6.8 A) | Preferred where lower clamping margin is required for 3.3 V logic protection; slightly higher IPPM (6.8 A vs. 6.4 A) | Select SMBJ68A if tighter VBR distribution and lower VC are prioritized over AEC-Q101 qualification |
| 1.5SMC68A | Higher-power 1500 W variant in larger DO-214AB (SMC) package; same 68 V rating but 13.3 A IPPM and 105 V VC | Suitable for heavy-duty industrial motor drives requiring higher single-pulse energy absorption; not drop-in due to footprint mismatch | Choose 1.5SMC68A only when PCB layout allows SMC pad dimensions and system-level surge exceeds 600 W |
Compared with SMBJ68A and 1.5SMC68A, the P6SMB68CH offers AEC-Q101 validation and DO-214AA footprint compatibility for space-constrained automotive modules, while delivering balanced clamping performance and leakage control ideal for cost-sensitive, high-volume ECU designs.
Availability
P6SMB68CH is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface protection, and lighting module surge suppression requiring stable component supply across production lifecycles.
Supply support for P6SMB68CH 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, MOSFETs, and power management devices.
The P6SMB68CH belongs to TSC's AEC-Q101-qualified P6SMBxH series designed specifically for automotive-grade transient suppression in 12 V/24 V systems, emphasizing reliability under thermal cycling, humidity, and high-energy surge stress.
FAQ
Is P6SMB68CH unidirectional or bidirectional?
The P6SMB68CH is a unidirectional TVS diode, intended for use with cathode connected to the protected line and anode to ground. For bidirectional operation, the CH-suffix family includes P6SMB68AH - which provides symmetrical clamping in both polarities and shares the same DO-214AA package and 600 W rating. The P6SMB68CH itself does not conduct in forward bias beyond its specified VF.
What is the maximum clamping voltage of P6SMB68CH under surge conditions?
The maximum clamping voltage of P6SMB68CH is 98 V at 6.4 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is guaranteed across temperature and process variation, and represents the highest voltage seen at the protected node during worst-case transient events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Does P6SMB68CH meet automotive qualification standards?
Yes, P6SMB68CH is AEC-Q101 qualified and meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test requirements for automotive electrical systems. It also complies with J-STD-020 moisture sensitivity level 1, JESD201 Class 2 whisker resistance, and RoHS/halogen-free mandates - confirming suitability for under-hood and cabin ECU applications.
What is the thermal resistance of P6SMB68CH, and how does it affect PCB layout?
P6SMB68CH has a junction-to-case thermal resistance (RθJC) of 10 °C/W and junction-to-ambient (RθJA) of 55 °C/W. In typical 2-layer PCB layouts with 1-inch² copper pour under the cathode pad, this allows sustained 3 W dissipation without exceeding 150 °C junction temperature. Layout best practice is to maximize copper area connected to the cathode terminal and avoid thermal isolation.
How does P6SMB68CH compare to P6SMB68AH in terms of electrical performance?
P6SMB68AH offers a tighter breakdown voltage range (64.6–71.4 V vs. 61.2–74.8 V for P6SMB68CH), lower clamping voltage (92 V vs. 98 V), and bidirectional functionality - making it suitable for AC-coupled or floating signal lines. The P6SMB68CH retains higher surge margin in unidirectional DC rails and is preferred where strict VWM margin (55.1 V) and AEC-Q101 compliance are primary concerns.
P6SMB68CH 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
P6SMB68CH FAQ
1.How can I place an order for P6SMB68CH through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB68CH 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 P6SMB68CH reliable?
The price and inventory of P6SMB68CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB68CH is usually 5 days.
3.What payment methods are accepted for P6SMB68CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB68CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB68CH?
P6SMB68CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB68CH 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 P6SMB68CH?
For technical support, including P6SMB68CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB68CH requirements.
6.How does Aetrix verify that P6SMB68CH is sourced from the original manufacturer or authorized distributors?
All P6SMB68CH 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 P6SMB68CH meets industry standards.
7.What is the process for return or replacement of P6SMB68CH?
All P6SMB68CH units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB68CH, 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 P6SMB68CH part is unused and in its original packaging.
Return procedure for P6SMB68CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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