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Taiwan Semiconductor Corporation P6SMB12A
- Part No.:
- P6SMB12A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB12A.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,238
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Product details
Overview
P6SMB12A from Taiwan Semiconductor is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode with a 12V nominal breakdown voltage (11.4–12.6V), 10.2V stand-off voltage, and 16.7V clamping voltage at 37A peak pulse current. It features glass-passivated junction, <1μA reverse leakage at VWM, and sub-1ps response time, deployed for surge protection in DC power rails of switching mode power supplies.
For engineers reviewing the P6SMB12A datasheet, P6SMB12A pinout, P6SMB12A application, or P6SMB12A equivalent, key selection criteria include its DO-214AA (SMB) package compatibility, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, 150°C maximum junction temperature, and unidirectional polarity marking-critical for input-stage ESD/surge hardening in industrial adapters and display power systems.
Technical Context
The P6SMB12A operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its specified VBR range (11.4–12.6V @ 1mA). Its clamping action limits transient energy to ≤16.7V at 37A (10/1000μs waveform), enabling robust protection of downstream 12V logic and power ICs without latch-up or thermal runaway.
Thermally, it delivers RθJC = 10°C/W and RθJA = 55°C/W, supporting continuous operation up to 150°C junction temperature. The device meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity-enabling reliable reflow assembly in high-volume SMT lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 11.4V / 12.6V @ 1mA - defines precise avalanche initiation threshold for 12V rail protection |
| VWM | 10.2V - maximum continuous reverse operating voltage before leakage rises significantly |
| VC @ IPPM | 16.7V @ 37A (10/1000μs) - peak clamped voltage seen by protected circuit during worst-case surge |
| PPPSM | 600W - non-repetitive peak pulse power handling capability per ISO 7637-2 standard |
| IR @ VWM | <1μA - ensures negligible standby power loss and no interference with low-current sensing circuits |
| Response Time | <1.0ps - enables suppression of fast-rising ESD and lightning-induced transients before system damage occurs |
| TJ max | +150°C - supports operation in enclosed, thermally constrained environments like sealed power adapters |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, single-diode configuration with cathode band marking. Dimensions conform to JEDEC DO-214AA outline; terminals are matte tin-plated for J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to ground or low-side return path; conducts during forward surge events (e.g., reverse polarity misconnection) |
| Cathode | Avalanche clamping terminal | Connected to protected line (e.g., +12V rail); enters breakdown when transient exceeds VBR, shunting current to ground |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity stress |
| ISO 7637-2 compliance | Validated against automotive-grade transient waveforms (Pulse 1, 2a, 2b, 3a, 3b), suitable for 12V vehicle accessory power inputs |
| Low profile SMB package | Enables automated pick-and-place and high-density PCB layout while maintaining 600W surge rating |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS directives-required for CE-marked industrial and consumer end equipment |
Applications
| Switching Mode Power Supply (SMPS) | AC-DC Adapters |
|---|---|
Use Scenario: Protection of primary-side rectifier output and secondary-side 12V DC bus against line surges and load dump transients. IC Role / Device Role: Unidirectional TVS placed across bulk capacitor or post-regulator rail to clamp overvoltage before it reaches PWM controller or gate driver. Use Value: Limits voltage excursion to 16.7V during 600W transients, preventing MOSFET avalanche failure and IC latch-up in compact 12V SMPS designs. | Use Scenario: Input-stage surge suppression in wall-mounted 12V/2A adapters used in retail kiosks and point-of-sale terminals. IC Role / Device Role: First-line defense against ESD and AC line transients entering via IEC 61000-4-5 coupled surges on the DC output port. Use Value: Maintains <1μA leakage at 10.2V stand-off, avoiding battery drain in always-on adapter standby modes while surviving repeated 1kV/500A pulses. |
| Flat Panel Monitor Power Board | Industrial Control Module |
Use Scenario: Protection of 12V backlight inverter supply and HDMI/USB interface power rails from electrostatic discharge during cable hot-plug events. IC Role / Device Role: Localized TVS mounted adjacent to connector entry points to minimize trace inductance and maximize clamping effectiveness. Use Value: Sub-1ps response ensures clamping initiates before ESD pulse propagates into sensitive timing controllers, preserving display startup integrity. | Use Scenario: DC input protection for programmable logic controller (PLC) digital I/O modules powered from 24V industrial buses subject to inductive switching noise. IC Role / Device Role: Standoff-rated TVS on 24V-to-12V LDO input to absorb repetitive 100ns–1μs transients generated by solenoid drivers. Use Value: 150°C junction rating allows operation inside sealed enclosures without derating; 10°C/W thermal resistance enables direct copper pour heatsinking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12A (Bourns) | Identical DO-214AA package, same 12V VBR range (11.4–12.6V), but rated for 600W with 17V VC @ 35.3A | Slightly higher clamping voltage (17V vs. 16.7V); identical ISO 7637-2 compliance and thermal specs | Select SMBJ12A if sourcing flexibility across multiple franchised distributors is prioritized; electrical performance is functionally interchangeable. |
| 1.5SMC12A (ON Semiconductor) | Same 12V VBR, 600W rating, DO-214AB (SMC) package - 2.5mm wider than DO-214AA, requiring PCB footprint change | Higher thermal mass (RθJA = 40°C/W) but incompatible pad layout; not drop-in replaceable | Choose 1.5SMC12A only if board redesign is acceptable and lower thermal resistance justifies larger footprint. |
Compared with P6SMB12A, SMBJ12A offers identical electrical protection with equivalent mechanical fit, whereas 1.5SMC12A requires layout revision due to DO-214AB packaging-making P6SMB12A optimal for space-constrained SMB-footprint designs needing proven surge immunity.
Availability
P6SMB12A is available at Aetrix Electronics and suitable for switching mode power supplies, AC-DC adapters, and flat panel monitor power boards requiring stable component supply and full compliance with ISO 7637-2 and RoHS standards.
Supply support for P6SMB12A 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 P6SMB12A belongs to TSC's P6SMB series of surface-mount TVS diodes, engineered specifically for high-reliability DC power line protection in space-constrained applications where fast response, low leakage, and automotive-grade surge immunity are mandatory.
FAQ
What is the maximum clamping voltage of the P6SMB12A under standard test conditions?
The P6SMB12A has a maximum clamping voltage (VC) of 16.7V at 37A peak pulse current using the 10/1000μs waveform. This value is measured per ANSI/IEEE C62.35 and represents the highest voltage the protected circuit will experience during a 600W transient event. The P6SMB12A maintains this clamping performance across its full operating temperature range of –55°C to +150°C.
Is the P6SMB12A suitable for bidirectional transient suppression?
No, the P6SMB12A is a unidirectional TVS diode intended for DC line protection with defined anode/cathode polarity. For bidirectional applications such as AC signal lines or data ports, the P6SMB12CA variant (with 'CA' suffix) must be used. The P6SMB12A's electrical specifications-including VBR, VWM, and VC-apply only in the reverse direction; forward conduction follows standard silicon diode behavior with VF ≈ 3.5V at 50A.
What is the reverse leakage current specification for the P6SMB12A at its stand-off voltage?
The P6SMB12A exhibits a maximum reverse leakage current (IR) of less than 1μA when biased at its 10.2V stand-off voltage (VWM). This ultra-low leakage is guaranteed across the full operating temperature range and ensures minimal power loss in battery-backed or energy-sensitive systems. The specification aligns with industry-standard test conditions per JEDEC JESD201 and is verified during 100% production screening.
Does the P6SMB12A meet automotive surge immunity requirements?
Yes, the P6SMB12A is explicitly tested and compliant with ISO 7637-2 for automotive transient immunity, covering Pulse 1 (inductive load disconnect), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling). Its 600W peak pulse power rating, 150°C junction rating, and J-STD-020 Level 1 moisture sensitivity make the P6SMB12A suitable for under-hood and infotainment power rail protection in passenger vehicles and commercial fleets.
What is the thermal resistance from junction to ambient for the P6SMB12A in standard mounting conditions?
The P6SMB12A has a junction-to-ambient thermal resistance (RθJA) of 55°C/W when mounted on a standard FR-4 PCB with minimum recommended copper pad area per JEDEC DO-214AA guidelines. This value assumes natural convection cooling with no additional heatsinking. For higher-power or elevated-temperature environments, thermal performance can be improved by increasing copper area or adding thermal vias-verified in TSC's thermal characterization report Q2209.
P6SMB12A 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):
- 10.2V
- Voltage - Breakdown (Min):
- 11.4V
- Voltage - Clamping (Max) @ Ipp:
- 16.7V
- Current - Peak Pulse (10/1000µs):
- 37A
- 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)
P6SMB12A FAQ
1.How can I place an order for P6SMB12A through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB12A 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 P6SMB12A reliable?
The price and inventory of P6SMB12A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB12A is usually 5 days.
3.What payment methods are accepted for P6SMB12A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB12A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB12A?
P6SMB12A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB12A 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 P6SMB12A?
For technical support, including P6SMB12A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB12A requirements.
6.How does Aetrix verify that P6SMB12A is sourced from the original manufacturer or authorized distributors?
All P6SMB12A 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 P6SMB12A meets industry standards.
7.What is the process for return or replacement of P6SMB12A?
All P6SMB12A units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB12A, 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 P6SMB12A part is unused and in its original packaging.
Return procedure for P6SMB12A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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