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Taiwan Semiconductor Corporation P6SMB51CH
- Part No.:
- P6SMB51CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB51CH.pdf
- Description:
- 600W, 51V, 10%, BIDIRECTIONAL, T
- Quantity:
- Payment:
- Shipping:
Inventory:3,612
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Product details
Overview
P6SMB51CH from Taiwan Semiconductor is a unidirectional 600W surface-mount Transient Voltage Suppressor (TVS) diode in DO-214AA (SMB) package, with breakdown voltage 45.9–56.1 V, clamping voltage 73.5 V at 8.5 A peak pulse current, and stand-off voltage 41.3 V. It protects automotive and industrial power rails against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the P6SMB51CH datasheet, P6SMB51CH pinout, P6SMB51CH application, or P6SMB51CH equivalent, this device serves as a high-reliability, AEC-Q101 qualified transient suppressor for 12 V/24 V system inputs, ESD-sensitive interfaces, and inductive load switching nodes where fast response (<1 ps), low leakage (<1 µA @ 41.3 V), and robust 600 W surge capability are required.
Technical Context
The P6SMB51CH employs a glass-passivated silicon junction optimized for low dynamic impedance and stable clamping under repetitive 10/1000 µs surges. Its thermal resistance (RθJA = 55 °C/W) enables operation up to +150 °C junction temperature with derated power above 25 °C ambient.
Designed for unidirectional suppression only, it features a cathode band marking and exhibits <0.102 %/°C VBR temperature coefficient. It meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1 - enabling standard reflow assembly without baking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 45.9 V / 56.1 V - ensures reliable triggering above 41.3 V operating rail while avoiding false trips during normal transients |
| VWM | 41.3 V - maximum continuous reverse voltage before leakage exceeds 1 µA; matches typical 36 V nominal automotive systems |
| VC @ IPPM | 73.5 V - clamped voltage at 8.5 A peak pulse; limits downstream IC stress to safe levels during ISO 7637-2 Pulse 2b |
| PPPSM | 600 W - non-repetitive peak pulse power handling per 10/1000 µs waveform; supports high-energy load dump events |
| IR @ VWM | <1 µA - ultra-low reverse leakage preserves battery life in always-on vehicle modules |
| TJ max | +150 °C - enables under-hood deployment without thermal derating penalties in engine control units |
| Response time | <1.0 ps - sub-picosecond junction response ensures clamping before transient energy couples into sensitive circuitry |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, single-diode configuration with cathode band marking on one end. Matte tin-plated leads meet J-STD-002 solderability requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path | Connected to ground or low-impedance chassis return; completes clamping loop during overvoltage events |
| Cathode | Protected line input | Connected to the 41.3 V rail being protected; reverse-biased during normal operation, avalanches during transients |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD HBM/MM - suitable for safety-critical ECUs |
| Glass passivated junction | Enhances long-term reliability and moisture resistance versus epoxy-passivated alternatives; critical for under-hood longevity |
| ISO 7637-2 compliance | Explicitly rated for Pulse 1 (inductive switch-off), Pulse 2a/2b (load dump), and Pulse 3a/3b (capacitive coupling) - eliminates need for external validation |
| Low profile SMB package | 3.5 mm height enables compact PCB layouts in space-constrained modules such as body controllers and ADAS sensors |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS Directive - supports global environmental compliance without performance trade-offs |
Applications
| Automotive Power Input Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: 12 V/24 V battery-fed ECU input subjected to load dump pulses up to 120 V and ISO 7637-2 Pulse 2b. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between power rail and ground, absorbing surge energy before it reaches DC-DC converters and microcontrollers. Use Value: Limits peak rail voltage to ≤73.5 V during 8.5 A transients, preventing latch-up or permanent damage to 5 V/3.3 V logic supplies downstream. |
Use Scenario: 24 V digital input channel on programmable logic controller exposed to field-wiring ESD and inductive kickback from solenoid valves. IC Role / Device Role / Timing Role: Front-end transient suppressor on signal line, shunting >99% of 1 kV ESD (IEC 61000-4-2) and 500 V/1 A surge (IEC 61000-4-4) to ground. Use Value: Maintains signal integrity by clamping within 1 ps while adding only 1 µA leakage - no impact on input threshold detection accuracy. |
| LED Driver Output Protection | Automotive Sensor Interface Protection |
Use Scenario: Constant-current LED driver output driving high-side automotive lighting loads, subject to inductive flyback when switched off. IC Role / Device Role / Timing Role: Reverse-biased TVS across LED string output, conducting only during negative voltage spikes exceeding 41.3 V. Use Value: Prevents MOSFET drain-source breakdown by clamping flyback peaks to 73.5 V - extends driver FET lifetime and avoids catastrophic failure. |
Use Scenario: LIN or CAN transceiver supply line in door module exposed to cable harness ESD and battery reversal transients. IC Role / Device Role / Timing Role: Primary overvoltage protection element on VCC rail feeding transceivers and analog front-ends. Use Value: Withstands 600 W surges while maintaining <1 µA leakage - ensures sensor bias stability and avoids false wake-up in sleep mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51A | Bidirectional variant; VBR 56.7–62.7 V; same 600 W rating but symmetrical clamping in both polarities | Required where bidirectional protection needed (e.g., AC-coupled data lines); not suitable for unidirectional DC rails without redesign | Select P6SMB51CH for dedicated 41.3 V DC rail protection; choose SMBJ51A only if polarity-agnostic clamping is mandatory |
| 1.5SMC51A | Same VBR range but in larger DO-214AB (SMC) package; higher thermal mass (RθJA = 35 °C/W) and 1.5 kW rating | Used in high-power industrial inverters where board space allows larger footprint and higher surge margin is required | P6SMB51CH preferred for space-constrained automotive modules; 1.5SMC51A only where >600 W headroom or lower thermal resistance is essential |
Compared with SMBJ51A and 1.5SMC51A, the P6SMB51CH delivers optimal balance of AEC-Q101 qualification, SMB footprint compatibility, and precise 41.3 V stand-off for 12 V/24 V systems - making it the default choice for automotive-grade unidirectional TVS in tight-layout ECUs.
Availability
P6SMB51CH is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, LED lighting drivers, and sensor interface modules requiring stable component supply and full AEC-Q101 traceability.
Supply support for P6SMB51CH 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 with global automotive and industrial certifications.
The P6SMB51CH belongs to TSC's AEC-Q101 qualified P6SMBxH series - engineered specifically for robust transient immunity in harsh automotive environments, emphasizing low leakage, fast response, and repeatable clamping performance.
FAQ
What is the polarity configuration of the P6SMB51CH?
The P6SMB51CH is a unidirectional TVS diode with cathode band marking. It conducts only when reverse-biased beyond its breakdown voltage (45.9–56.1 V), making it suitable for protecting positive DC rails. Unlike bidirectional variants (e.g., P6SMB51AH), it does not suppress positive transients on the anode side - correct orientation is critical during PCB layout. The P6SMB51CH must be installed with cathode toward the protected line and anode to ground.
Does the P6SMB51CH meet automotive qualification standards?
Yes, the P6SMB51CH is AEC-Q101 qualified per the manufacturer's documentation, covering stress tests including high-temperature operating life (HTOL), temperature cycling (TCT), and human-body-model ESD (HBM). This certification confirms suitability for automotive powertrain, chassis, and body electronics. The P6SMB51CH also complies with ISO 7637-2 Pulse 1/2a/2b/3a/3b, supporting direct integration into vehicle-level EMC validation without additional suppressor stages.
What is the maximum clamping voltage of the P6SMB51CH under surge conditions?
The P6SMB51CH has a maximum clamping voltage (VC) of 73.5 V at 8.5 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is guaranteed across temperature and lot variations per the datasheet. During actual system transients, the P6SMB51CH maintains clamping within this limit, ensuring downstream components see no more than 73.5 V - critical for safeguarding 5 V or 3.3 V logic supplies fed from protected 41.3 V rails.
Can the P6SMB51CH be used in bidirectional signal protection?
No, the P6SMB51CH is strictly unidirectional and unsuitable for bidirectional signal lines such as RS-485, CAN, or USB. Its design clamps only reverse-voltage transients on the cathode side; forward surges pass unattenuated. For bidirectional protection, use the P6SMB51AH variant instead - which shares the same package and power rating but provides symmetrical clamping in both directions. Substituting P6SMB51CH in a bidirectional application risks component failure and unprotected transients.
What is the thermal resistance and maximum junction temperature of the P6SMB51CH?
The P6SMB51CH has a junction-to-ambient thermal resistance (RθJA) of 55 °C/W and a maximum junction temperature (TJ) of +150 °C. Under continuous 3 W dissipation (Ptot), ambient temperature must remain below +95 °C to avoid exceeding TJ max. In transient operation, the P6SMB51CH handles 600 W pulses without thermal runaway due to its short-duration energy absorption - but PCB copper area and airflow must still support steady-state thermal management for reliability in sealed enclosures.
P6SMB51CH 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):
- 41.3V
- Voltage - Breakdown (Min):
- 45.9V
- Voltage - Clamping (Max) @ Ipp:
- 73.5V
- Current - Peak Pulse (10/1000µs):
- 8.5A
- 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)
P6SMB51CH FAQ
1.How can I place an order for P6SMB51CH through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB51CH 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 P6SMB51CH reliable?
The price and inventory of P6SMB51CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB51CH is usually 5 days.
3.What payment methods are accepted for P6SMB51CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB51CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB51CH?
P6SMB51CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB51CH 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 P6SMB51CH?
For technical support, including P6SMB51CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB51CH requirements.
6.How does Aetrix verify that P6SMB51CH is sourced from the original manufacturer or authorized distributors?
All P6SMB51CH 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 P6SMB51CH meets industry standards.
7.What is the process for return or replacement of P6SMB51CH?
All P6SMB51CH units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB51CH, 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 P6SMB51CH part is unused and in its original packaging.
Return procedure for P6SMB51CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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