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Taiwan Semiconductor Corporation P6SMB20CH
- Part No.:
- P6SMB20CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB20CH.pdf
- Description:
- 600W, 20V, 10%, BIDIRECTIONAL, T
- Quantity:
- Payment:
- Shipping:
Inventory:9,218
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Product details
Overview
P6SMB20CH from Taiwan Semiconductor is a bidirectional 600W surface-mount Transient Voltage Suppressor (TVS) diode in DO-214AA (SMB) package, with breakdown voltage range 18.0–22.0 V at 1.0 mA test current, clamping voltage 29.1 V at 21 A peak pulse current, and AEC-Q101 qualification for automotive use.
For engineers reviewing the P6SMB20CH datasheet, P6SMB20CH pinout, P6SMB20CH application, or P6SMB20CH equivalent, this device serves as a robust, low-profile ESD and surge protection solution for automotive lighting, infotainment power rails, and CAN/LIN bus interfaces requiring fast response (<1.0 ps), low leakage (<1 µA @ 16.2 V), and ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance.
Technical Context
The P6SMB20CH is a bipolar (bidirectional) TVS diode designed to protect sensitive electronics against transient overvoltages in both polarities. Its glass-passivated junction ensures stable breakdown characteristics and low leakage, while its 10/1000 µs waveform-rated 600 W peak pulse power supports high-energy surge events without degradation.
Thermal performance is defined by RθJC = 10 °C/W and RθJA = 55 °C/W, enabling reliable operation up to TJ = +150 °C. The device meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1, supporting lead-free reflow assembly without preconditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 18.0 V / 22.0 V - Ensures consistent clamping onset across production lots and temperature range (-55°C to +150°C) |
| VWM | 16.2 V - Maximum continuous reverse operating voltage; sets safe margin below breakdown for system-level DC rail protection |
| VC @ IPPM | 29.1 V @ 21 A - Clamping voltage under 10/1000 µs surge; defines worst-case voltage seen by protected IC during transient |
| PPPSM | 600 W - Peak pulse power rating; determines survivability against ISO 7637-2 Pulse 1 (inductive load dump) and Pulse 2b (battery disconnect) |
| IR @ VWM | <1 µA - Ultra-low reverse leakage at stand-off voltage; avoids loading of high-impedance sensor or communication lines |
| TJ max | +150 °C - Junction temperature limit; enables use in under-hood automotive modules without derating at ambient ≤125°C |
| Package | DO-214AA (SMB) - Standardized surface-mount outline with 4.58 mm × 3.94 mm footprint and 2.29 mm height; compatible with automated pick-and-place |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with matte tin-plated leads, cathode band marking for polarity identification. Bidirectional configuration means no anode/cathode distinction - terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Transient voltage input/output node | Connects directly to protected line (e.g., CAN_H, LIN, 12V rail); carries full surge current during clamping |
| Terminal 2 | Transient voltage input/output node | Completes bidirectional path; same electrical role as Terminal 1; no polarity dependency |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per stress test plan |
| Glass passivated junction | Eliminates oxide-related parameter drift and improves long-term stability of VBR and leakage under thermal stress |
| ISO 7637-2 compliant | Withstands Pulse 1 (−150 V/2 Ω), Pulse 2a (+100 V/50 Ω), Pulse 2b (−100 V/50 Ω), and Pulse 3a/3b (±25 V/50 Ω) without failure |
| Fast response time | <1.0 ps rise time from 0 V to VBR min - limits voltage overshoot before clamping engages, critical for protecting fast logic and transceivers |
| Moisture sensitivity level 1 | No floor life limitation or baking requirement prior to reflow; simplifies SMT line logistics and reduces handling risk |
Applications
| Automotive Lighting Systems | CAN Bus Physical Layer Protection |
|---|---|
Use Scenario: LED headlamp driver circuits exposed to load-dump transients and alternator ripple. IC Role / Device Role / Timing Role: Primary transient suppression device placed at 12 V input rail, upstream of DC-DC converter and LED controller ICs. Use Value: Limits voltage excursion to ≤29.1 V during 600 W surges, preventing latch-up or gate oxide damage in downstream MOSFET drivers and microcontrollers. |
Use Scenario: CAN_H/CAN_L lines in body control modules subject to ESD and coupled noise from nearby solenoids or motors. IC Role / Device Role / Timing Role: Bidirectional clamping element on differential pair, referenced to ground with minimal parasitic capacitance (typ. <100 pF). Use Value: Maintains signal integrity by clamping common-mode transients to <30 V while adding <0.5 pF per line to data path - no bit error rate degradation at 500 kbps. |
| Infotainment Power Supply Rails | Industrial Sensor Interface Protection |
Use Scenario: 5 V and 3.3 V supply inputs to audio amplifiers, display controllers, and USB hubs in center console units. IC Role / Device Role / Timing Role: Secondary overvoltage clamp after primary fuse and LC filter; responds within picoseconds to fast EFT bursts. Use Value: Prevents brownout-induced firmware crash or EEPROM corruption by holding rail voltage above 2.5 V during 10/1000 µs surges up to 21 A peak. |
Use Scenario: 4–20 mA loop-powered sensors in factory automation exposed to relay switching noise and lightning-induced surges. IC Role / Device Role / Timing Role: Line-to-ground protection device mounted at field-side connector, rated for continuous 24 V DC operation. Use Value: Withstands repeated 1 kV/500 Ω EFT bursts (IEC 61000-4-4) without parameter shift, ensuring >10-year field reliability in harsh industrial environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20CA | Same DO-214AA package, identical VBR (18–22 V), but lower PPPSM = 600 W (same rating), higher VC = 32.4 V @ 18.4 A | Marginally higher clamping voltage reduces protection level for low-voltage ICs (e.g., 3.3 V logic) | Select when cost sensitivity outweighs 3.3 V margin; verify VC compatibility with downstream BVDSS or absolute maximum ratings. |
| 1.5SMC20CA | Larger DO-214AB (SMC) package (7.11 × 6.22 mm), same VBR, PPPSM = 1500 W, VC = 32.4 V @ 46.3 A | Higher power handling suits heavy-duty industrial motor drives but requires PCB area increase and layout revision | Choose only if system-level surge testing exceeds 600 W requirements; not drop-in due to footprint mismatch. |
Compared with SMBJ20CA and 1.5SMC20CA, the P6SMB20CH offers optimal balance of compact SMB footprint, AEC-Q101 qualification, and tight 29.1 V clamping - making it preferred for space-constrained automotive modules where board real estate and qualification rigor are non-negotiable.
Availability
P6SMB20CH is available at Aetrix Electronics and suitable for automotive lighting systems, CAN bus interfaces, and infotainment power supplies requiring stable component supply, AEC-Q101 traceability, and RoHS/halogen-free compliance.
Supply support for P6SMB20CH 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 MOSFETs for automotive and industrial markets.
The P6SMB20CH belongs to TSC's AEC-Q101-qualified P6SMBxCH series, engineered specifically for automotive-grade transient suppression in engine control, chassis, and body electronics where reliability under thermal and electrical stress is mission-critical.
FAQ
What is the polarity configuration of the P6SMB20CH?
The P6SMB20CH is a bidirectional TVS diode, meaning it provides symmetrical clamping in both forward and reverse directions. It has no designated anode or cathode - either terminal may be connected to the protected line or ground. This eliminates orientation errors during automated placement and simplifies layout for differential signal lines like CAN or LIN. The device marking includes "CH" suffix to denote bidirectional construction, and its electrical specifications apply identically in both polarities.
Does the P6SMB20CH meet automotive qualification standards?
Yes, the P6SMB20CH is AEC-Q101 qualified, having passed stress tests including temperature cycling, high-temperature operating life, and mechanical shock per the AEC-Q101 standard. It also complies with ISO 7637-2 for automotive transient immunity (Pulse 1, 2a, 2b, 3a, 3b) and meets J-STD-020 moisture sensitivity level 1 - confirming suitability for under-hood and cabin-mounted automotive ECUs without special handling or baking.
What is the maximum clamping voltage of the P6SMB20CH under surge conditions?
The P6SMB20CH has a maximum clamping voltage (VC) of 29.1 V when subjected to a 10/1000 µs peak pulse current of 21 A. This value is measured per ANSI/IEEE C62.35 and represents the worst-case voltage imposed on the protected circuit during standardized surge events. It ensures compatibility with 24 V automotive systems and safeguards ICs rated for absolute maximum voltages up to 30 V.
How does the P6SMB20CH compare to unidirectional TVS diodes in the same family?
The P6SMB20CH differs from unidirectional variants (e.g., P6SMB20H) by offering symmetrical breakdown behavior - VBR and VC are identical in both directions. Unidirectional versions include a cathode band and conduct only in reverse bias, making them unsuitable for AC or differential signals. The P6SMB20CH's bidirectional design is essential for protecting bidirectional buses like CAN, LIN, or RS-485, where transients can occur with either polarity relative to ground.
Is the P6SMB20CH compatible with lead-free reflow soldering processes?
Yes, the P6SMB20CH is fully compatible with lead-free reflow soldering per JEDEC J-STD-020. Its DO-214AA (SMB) package uses matte tin-plated leads and meets JESD201 Class 2 whisker resistance. With Moisture Sensitivity Level 1, it requires no baking or floor-life management before assembly - enabling direct placement into standard 260°C peak reflow profiles without delamination or popcorn failure risk.
P6SMB20CH 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):
- 16.2V
- Voltage - Breakdown (Min):
- 18V
- Voltage - Clamping (Max) @ Ipp:
- 29.1V
- Current - Peak Pulse (10/1000µs):
- 21A
- 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)
P6SMB20CH FAQ
1.How can I place an order for P6SMB20CH through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB20CH 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 P6SMB20CH reliable?
The price and inventory of P6SMB20CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB20CH is usually 5 days.
3.What payment methods are accepted for P6SMB20CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB20CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB20CH?
P6SMB20CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB20CH 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 P6SMB20CH?
For technical support, including P6SMB20CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB20CH requirements.
6.How does Aetrix verify that P6SMB20CH is sourced from the original manufacturer or authorized distributors?
All P6SMB20CH 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 P6SMB20CH meets industry standards.
7.What is the process for return or replacement of P6SMB20CH?
All P6SMB20CH units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB20CH, 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 P6SMB20CH part is unused and in its original packaging.
Return procedure for P6SMB20CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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