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Taiwan Semiconductor Corporation P6SMB39A
- Part No.:
- P6SMB39A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB39A.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,527
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Product details
Overview
P6SMB39A from Taiwan Semiconductor is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode with a standoff voltage of 33.3V, breakdown voltage range of 37.1–41.0V at 1mA, and clamping voltage of 53.9V at 11.6A peak pulse current. It protects DC power rails in switching mode power supplies, adapters, and display electronics against ESD and surge events per ISO 7637-2 Pulse 1/2a/2b/3a/3b.
For engineers reviewing the P6SMB39A datasheet, P6SMB39A pinout, P6SMB39A application, or P6SMB39A equivalent, key selection criteria include its DO-214AA (SMB) package compatibility, 1μA max reverse leakage at VWM, <1.0ps response time, and compliance with JESD201 Class 2 whisker resistance and UL 94V-0 flammability standards.
Technical Context
The P6SMB39A operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its specified breakdown range. Its glass-passivated junction ensures stable clamping performance across -55°C to +150°C junction temperature, with thermal resistance RθJC = 10°C/W and RθJA = 55°C/W enabling reliable power dissipation in compact PCB layouts.
It delivers 600W non-repetitive peak pulse power under 10/1000μs waveform, with clamping voltage tightly controlled at 53.9V - critical for safeguarding 36V nominal systems such as industrial SMPS outputs and monitor power inputs where overvoltage margin must remain below 55V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33.3 V - Maximum continuous reverse operating voltage before conduction begins; sets safe DC rail margin for 36V systems. |
| VBR (min/max) | 37.1 V / 41.0 V at IT = 1 mA - Confirmed breakdown range ensures predictable turn-on during transients. |
| VC @ IPPM | 53.9 V at 11.6 A - Clamping voltage limits downstream IC stress during 600W surge events. |
| IR @ VWM | <1 μA - Negligible leakage preserves efficiency in low-power standby modes. |
| PPPSM | 600 W - Peak pulse power rating supports automotive-grade ISO 7637-2 Pulse 1/2a/2b/3a/3b immunity testing. |
| Package | DO-214AA (SMB) - Standardized surface-mount footprint compatible with automated assembly and IPC-7351B land patterns. |
| TJ max | +150 °C - Enables operation in high-temperature environments like enclosed power adapters. |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with matte tin-plated leads, cathode band marking polarity, 0.090g weight, and UL 94V-0 rated compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or low-side return path in unidirectional TVS configuration. |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 36V rail); conducts during overvoltage to shunt energy to ground. |
Key Features
| Feature | Design Value |
|---|---|
| Fast response time | <1.0 ps - Enables suppression of nanosecond-scale ESD events before sensitive ICs are damaged. |
| Glass passivated junction | Stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure. |
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupled noise). |
| Moisture sensitivity level | MSL Level 1 - No floor life limitation; suitable for standard SMT reflow without baking. |
Applications
| Switching Mode Power Supply (SMPS) | AC-DC Adapter |
|---|---|
Use Scenario: Protects secondary-side 36V output rail from load-dump transients and transformer leakage spikes. IC Role / Device Role: Unidirectional TVS clamp placed between output rail and ground. Use Value: Limits clamped voltage to 53.9V, ensuring downstream DC-DC converters and controllers remain within absolute maximum ratings. | Use Scenario: Safeguards USB-C PD or legacy barrel-jack adapter outputs against surges induced by cable hot-plug or mains coupling. IC Role / Device Role: Primary overvoltage protection on regulated DC output line. Use Value: Withstands 600W pulses while maintaining <1μA leakage, preserving no-load efficiency and meeting ENERGY STAR standby requirements. |
| Television Power Board | Monitor Backlight Supply |
Use Scenario: Shields main 36V logic supply from ESD events during HDMI/USB port handling and internal relay switching. IC Role / Device Role: Point-of-load TVS on board-level 36V distribution net. Use Value: DO-214AA footprint allows placement near connectors; 53.9V clamping prevents latch-up in SoC power management ICs. | Use Scenario: Guards CCFL or LED backlight driver input against flyback spikes from inductive ballast circuits. IC Role / Device Role: Transient suppressor on high-current 36V backlight rail. Use Value: 11.6A peak pulse current rating handles repetitive inductive kick energy without degradation over product lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36A | Same DO-214AA package; VWM = 36V, VC = 58.1V at 10.3A - higher clamping voltage than P6SMB39A's 53.9V. | Less effective clamping margin for 36V rails near 55V IC limits; suited for 40V+ systems. | Select SMBJ36A only if higher VWM is required to avoid false triggering on ripple; P6SMB39A preferred for tighter clamping. |
| 1.5SMC39A | DO-214AB (SMC) package; same VWM/VBR/VC specs but higher PPPSM = 1500W - larger footprint and thermal mass. | Used where higher surge endurance is mandated (e.g., industrial outdoor equipment), not space-constrained consumer boards. | Choose 1.5SMC39A only when 1500W rating is explicitly required; P6SMB39A offers optimal size/power balance for standard adapter/TV use. |
Compared with SMBJ36A and 1.5SMC39A, the P6SMB39A provides the lowest clamping voltage (53.9V) in the smallest DO-214AA footprint, making it ideal for cost-sensitive, space-constrained 36V rail protection where 600W surge immunity suffices.
Availability
P6SMB39A is available at Aetrix Electronics and suitable for switching mode power supplies, AC-DC adapters, and television power boards requiring stable component supply and full traceability.
Supply support for P6SMB39A 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 power management and protection markets since 1979.
The P6SMB series belongs to TSC's surface-mount TVS diode product line, engineered specifically for robust, high-reliability transient suppression in consumer, industrial, and automotive auxiliary power systems.
FAQ
What is the polarity configuration of the P6SMB39A?
The P6SMB39A is a unidirectional TVS diode with cathode-band marking indicating the clamping terminal. It conducts in reverse bias above VBR and blocks forward current up to 3.5V at 50A, as specified for devices in the P6SMB6.8–P6SMB91 range. This polarity enables precise placement on positive-rail protection paths.
Does the P6SMB39A meet automotive transient immunity standards?
Yes, the P6SMB39A meets ISO 7637-2 Pulse 1 (inductive switch-off), Pulse 2a/2b (supply interruption and coupling), and Pulse 3a/3b (capacitive coupling) requirements. Its 600W peak pulse rating and sub-1ps response ensure compliance for 12V/24V/36V auxiliary systems in passenger vehicle infotainment and display modules.
What is the maximum junction temperature rating for the P6SMB39A?
The P6SMB39A has a maximum junction temperature (TJ) of +150°C and a storage temperature range of -55°C to +150°C. This rating supports operation in sealed enclosures such as power adapters and flat-panel TV backlights where ambient temperatures may exceed 85°C under sustained load.
How does the P6SMB39A compare to the P6SMB39 variant?
The P6SMB39A offers tighter VBR tolerance (37.1–41.0V) versus P6SMB39 (35.1–42.9V), resulting in more consistent clamping behavior and lower VC (53.9V vs. 56.4V). Both share identical DO-214AA packaging and 600W rating, but the 'A' suffix denotes enhanced parameter grading for critical applications.
Is the P6SMB39A RoHS and halogen-free compliant?
Yes, the P6SMB39A is RoHS compliant and halogen-free per IEC 61249-2-21. Its molding compound meets UL 94V-0 flammability rating, and matte tin-plated leads comply with J-STD-002 solderability requirements - confirming suitability for lead-free reflow assembly and environmentally regulated markets.
P6SMB39A 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):
- 33.3V
- Voltage - Breakdown (Min):
- 37.1V
- Voltage - Clamping (Max) @ Ipp:
- 53.9V
- Current - Peak Pulse (10/1000µs):
- 11.6A
- 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)
P6SMB39A FAQ
1.How can I place an order for P6SMB39A through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB39A 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 P6SMB39A reliable?
The price and inventory of P6SMB39A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB39A is usually 5 days.
3.What payment methods are accepted for P6SMB39A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB39A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB39A?
P6SMB39A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB39A 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 P6SMB39A?
For technical support, including P6SMB39A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB39A requirements.
6.How does Aetrix verify that P6SMB39A is sourced from the original manufacturer or authorized distributors?
All P6SMB39A 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 P6SMB39A meets industry standards.
7.What is the process for return or replacement of P6SMB39A?
All P6SMB39A units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB39A, 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 P6SMB39A part is unused and in its original packaging.
Return procedure for P6SMB39A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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