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Taiwan Semiconductor Corporation P6SMB15A
- Part No.:
- P6SMB15A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB15A.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,745
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Product details
Overview
P6SMB15A from Taiwan Semiconductor is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode with a breakdown voltage range of 14.3–15.8 V, clamping voltage of 21.2 V at 29 A peak pulse current, and stand-off voltage of 12.8 V. It provides robust ESD and surge protection for DC power rails in switching mode power supplies, adapters, and display electronics.
For engineers reviewing the P6SMB15A datasheet, P6SMB15A pinout, P6SMB15A application, or P6SMB15A equivalent, key selection criteria include its DO-214AA (SMB) package compatibility, 1.0 mA test current specification, <1 µA reverse leakage at 12.8 V, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and thermal resistance of 55 °C/W junction-to-ambient.
Technical Context
The P6SMB15A operates as a unidirectional avalanche diode, designed to clamp transient overvoltages above its 12.8 V stand-off threshold while maintaining low leakage (<1 µA). Its glass-passivated junction ensures stable breakdown behavior and long-term reliability under repetitive surge stress.
With a fast response time of <1.0 ps from 0 V to VBR(min), it protects sensitive downstream circuitry against ESD (IEC 61000-4-2), electrical fast transients (IEC 61000-4-4), and automotive load dump surges per ISO 7637-2. Its 10 °C/W junction-to-case thermal resistance supports sustained power dissipation in compact SMB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 14.3 V / 15.8 V - defines guaranteed avalanche conduction onset window at 1.0 mA test current |
| VWM | 12.8 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 21.2 V at 29 A - clamped voltage during 10/1000 µs surge, limiting stress on protected ICs |
| PPPSM | 600 W - non-repetitive peak pulse power handling capability per standard waveform |
| IR @ VWM | <1 µA - ultra-low reverse leakage preserves efficiency in high-impedance bias networks |
| TJ(max) | +150 °C - maximum junction temperature enabling operation in thermally constrained enclosures |
| RθJA | 55 °C/W - thermal resistance from junction to ambient, critical for PCB copper area design |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, single-die unidirectional configuration with cathode band marking. Matte tin-plated leads meet J-STD-002 solderability requirements and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node in unidirectional clamping configuration |
| Cathode | Protected line input | Connected to the rail requiring overvoltage protection (e.g., +12 V input); marked with band |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity |
| ISO 7637-2 compliance | Validated protection against automotive transient pulses (Pulse 1, 2a, 2b, 3a, 3b) without external filtering |
| Moisture sensitivity level 1 | Zero bake requirement before reflow; compatible with standard SMT assembly lines |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS directives for environmentally compliant end equipment |
| Fast response time | <1.0 ps rise-to-breakdown enables protection of high-speed logic and analog interfaces |
Applications
| Switching Mode Power Supply (SMPS) | AC-DC Adapter |
|---|---|
Use Scenario: Input rectifier output rail in offline flyback converters subjected to line surges and MOSFET switching spikes. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed across bulk capacitor to limit transient overshoot. Use Value: Clamps 10/1000 µs surges to ≤21.2 V, preventing overvoltage damage to primary-side controller ICs rated for 24 V absolute max. | Use Scenario: Secondary-side 12 V DC output line exposed to load-dump transients during hot-plug events. IC Role / Device Role / Timing Role: Standoff protector on regulated output, absorbing energy from cable inductance discharge. Use Value: Withstands 29 A peak pulse current while holding voltage below 21.2 V, safeguarding USB-PD interface ICs and load switches. |
| Flat Panel TV Power Board | Computer Monitor DC Input |
Use Scenario: 19 V main input rail in LED-backlit TV power supply encountering ESD and lightning-induced surges. IC Role / Device Role / Timing Role: Primary-line transient suppressor located upstream of DC-DC converters and PFC controllers. Use Value: 600 W peak power rating handles multi-kV EFT bursts; 12.8 V VWM ensures no conduction during normal 19 V operation. | Use Scenario: 12 V auxiliary rail powering monitor logic board, susceptible to coupling from adjacent high-current video drivers. IC Role / Device Role / Timing Role: Localized rail protector mounted near FPGA or microcontroller power pins. Use Value: Ultra-low 1 µA leakage avoids loading 12 V standby rail; 21.2 V clamping prevents latch-up in 3.3 V/5 V logic ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15A | Same DO-214AA package; identical VBR (14.3–15.8 V), VC = 21.2 V, but rated for 600 W per JEDEC standards | No functional difference in clamping performance; minor variation in thermal derating curve slope | Select SMBJ15A when sourcing from manufacturers requiring JEDEC-compliant qualification documentation |
| 1.5SMC15A | DO-214AB (SMC) package - larger footprint (7.11 × 6.22 mm vs. SMB's 4.57 × 3.94 mm); same electrical specs | Requires PCB layout change; higher thermal mass allows marginally better sustained surge handling | Choose 1.5SMC15A only if board space permits larger SMC and higher IFSM (200 A) is required |
Compared with SMBJ15A and 1.5SMC15A, the P6SMB15A offers identical electrical protection performance in the smallest standardized SMB footprint, enabling higher board density without sacrificing clamping accuracy or surge immunity - ideal for space-constrained consumer power designs.
Availability
P6SMB15A is available at Aetrix Electronics and suitable for switching mode power supplies, AC-DC adapters, and flat-panel display electronics requiring stable component supply and full compliance with ISO 7637-2 and RoHS directives.
Supply support for P6SMB15A 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 consumer markets.
The P6SMB series belongs to TSC's surface-mount transient voltage suppressor product line, engineered specifically for high-reliability DC rail protection in cost-sensitive, high-volume power conversion systems.
FAQ
What is the polarity configuration of the P6SMB15A?
The P6SMB15A is a unidirectional TVS diode with cathode band marking. It conducts only when the cathode is at a higher potential than the anode - making it suitable for protecting positive DC rails against overvoltage transients. This configuration differs from bidirectional variants (e.g., P6SMB15CA), which suppress surges in both directions.
Does the P6SMB15A meet automotive transient immunity standards?
Yes, the P6SMB15A meets ISO 7637-2 requirements for Pulse 1, 2a, 2b, 3a, and 3b, making it suitable for 12 V automotive subsystems such as infotainment power supplies and body control modules. Its 21.2 V clamping voltage ensures compatibility with 16 V-rated downstream components under load-dump conditions.
What is the maximum peak pulse current the P6SMB15A can handle?
The P6SMB15A is rated for a maximum peak pulse current (IPPM) of 29 A under the standard 10/1000 µs waveform. This value is derived from its 600 W peak pulse power rating and 21.2 V clamping voltage (IPPM = PPPSM/VC). Derating applies above 25 °C ambient per the published thermal curve.
How does the P6SMB15A differ from the P6SMB15 (non-A) variant?
The P6SMB15A has tighter VBR tolerance (14.3–15.8 V) versus P6SMB15 (13.5–16.5 V), resulting in more precise clamping onset. Both share identical package, power rating, and thermal specs, but the 'A' suffix indicates enhanced voltage uniformity - critical for designs requiring consistent protection thresholds across production batches.
Is the P6SMB15A compatible with lead-free reflow processes?
Yes, the P6SMB15A features matte tin-plated leads qualified to J-STD-002 and is rated for moisture sensitivity level 1, meaning it can be processed using standard Pb-free reflow profiles (peak 260 °C) without baking. Its UL 94V-0 molding compound also withstands multiple reflow cycles without delamination.
P6SMB15A 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):
- 12.8V
- Voltage - Breakdown (Min):
- 14.3V
- Voltage - Clamping (Max) @ Ipp:
- 21.2V
- Current - Peak Pulse (10/1000µs):
- 29A
- 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)
P6SMB15A FAQ
1.How can I place an order for P6SMB15A through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB15A 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 P6SMB15A reliable?
The price and inventory of P6SMB15A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB15A is usually 5 days.
3.What payment methods are accepted for P6SMB15A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB15A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB15A?
P6SMB15A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB15A 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 P6SMB15A?
For technical support, including P6SMB15A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB15A requirements.
6.How does Aetrix verify that P6SMB15A is sourced from the original manufacturer or authorized distributors?
All P6SMB15A 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 P6SMB15A meets industry standards.
7.What is the process for return or replacement of P6SMB15A?
All P6SMB15A units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB15A, 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 P6SMB15A part is unused and in its original packaging.
Return procedure for P6SMB15A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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