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Taiwan Semiconductor Corporation P6SMB39
- Part No.:
- P6SMB39
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB39.pdf
- Description:
- 600W, 39V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:8,905
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Product details
Overview
P6SMB39 from Taiwan Semiconductor is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode with a breakdown voltage range of 35.1–42.9V, clamping voltage of 56.4V at 11.1A peak pulse current, and DO-214AA (SMB) package. 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 P6SMB39 datasheet, P6SMB39 pinout, P6SMB39 application, or P6SMB39 equivalent, key selection criteria include its 31.6V stand-off voltage, <1μA reverse leakage at VWM, 1.0ps response time, and compliance with J-STD-020 moisture sensitivity level 1 - critical for high-reliability automated assembly and automotive-grade surge immunity.
Technical Context
The P6SMB39 operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its minimum breakdown threshold of 35.1V at 1.0mA test current. Its glass-passivated junction ensures stable VBR temperature coefficient (0.100%/°C) and low leakage (<1μA at 31.6V), enabling reliable hold-off in 24–36V system rails.
Under transient stress (10/1000μs waveform), it clamps to ≤56.4V while diverting up to 11.1A, dissipating 600W non-repetitively. Thermal performance is defined by RθJC = 10°C/W and RθJA = 55°C/W, supporting operation from –55°C to +150°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 35.1V / 42.9V - defines guaranteed avalanche initiation range at 1.0mA; ensures robust overvoltage triggering margin above 31.6V operating rail |
| VWM | 31.6V - maximum continuous reverse working voltage; sets upper limit for safe DC bias without leakage degradation |
| IPPM | 11.1A - peak pulse current under 10/1000μs surge; determines minimum trace width and PCB layout for transient energy handling |
| VC@IPPM | 56.4V - clamped voltage during rated surge; defines worst-case overvoltage seen by downstream ICs during protection event |
| PPPSM | 600W - non-repetitive peak pulse power; validates suitability for ISO 7637-2 Pulse 1 (inductive load dump) and Pulse 2b (battery disconnect) |
| TJ max | +150°C - maximum junction temperature; enables use in enclosed power supplies with limited airflow and high ambient temperatures |
| Response time | <1.0ps - time from 0V to VBR min; ensures suppression before sensitive logic or analog circuitry sustains damage |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, single-die unidirectional configuration. Cathode indicated by molded band on case. Matte tin-plated leads, RoHS and halogen-free compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | DC return path / ground reference | Connected to system ground or low-side return; must maintain low-impedance path to handle 11.1A surge current |
| Cathode | Protected line input | Connected to the rail being protected (e.g., +24V supply); polarity marking essential to prevent reverse-bias failure |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR and low leakage across temperature and lifetime; eliminates passivation-related drift in industrial environments |
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive switch-off), Pulse 2a/2b (battery transients), and Pulse 3a/3b (capacitive coupling); meets automotive EMC requirements |
| J-STD-020 Level 1 moisture sensitivity | Enables standard SMT reflow without baking; supports high-throughput automated placement without yield loss |
| UL 94V-0 molding compound | Prevents flame propagation in fault conditions; required for safety-certified power adapters and consumer displays |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes overvoltage stress on protected ICs - e.g., 56.4V clamp vs. 35.1V breakdown gives 60% headroom for 3.3V/5V logic interfaces |
Applications
| Switching Mode Power Supply (SMPS) | AC-DC Adapter |
|---|---|
Use Scenario: Input rectifier output rail in 24V/48V offline SMPS subjected to lightning-induced surges and MOSFET switching transients. IC Role / Device Role: Primary overvoltage clamp on bulk DC bus, placed between bridge rectifier and primary-side controller. Use Value: Limits transient overshoot to ≤56.4V, protecting PWM controllers and gate drivers rated for 65V absolute maximum rating. | Use Scenario: Secondary-side 24V output rail in universal-input wall adapter exposed to ESD and load-dump events during hot-plug. IC Role / Device Role: Final-stage TVS on regulated output, downstream of DC-DC converter and before connector interface. Use Value: Maintains <1μA leakage at 31.6V, preserving no-load efficiency while clamping fast 1kV ESD pulses per IEC 61000-4-2. |
| Television Power Board | Monitor Backlight Inverter |
Use Scenario: 36V standby rail in smart TV mainboard experiencing repetitive 100V/1ms surges from internal relay switching and external cable coupling. IC Role / Device Role: Standby rail protector adjacent to microcontroller and memory power pins. Use Value: Withstands ≥1000 surges at rated power due to low thermal resistance (RθJA = 55°C/W), ensuring long-term reliability in consumer field deployments. | Use Scenario: High-voltage boost output (≈30–40V) of CCFL or LED backlight inverter subjected to open-circuit transients during lamp failure. IC Role / Device Role: Output-side transient limiter placed directly across inverter transformer secondary winding. Use Value: Fast <1.0ps response prevents voltage doubling effects from damaging inverter driver ICs rated for 60V max. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36A | Breakdown range 38.0–42.0V; clamping voltage 58.1V @ 10.3A; same DO-214AA package | Higher VBR min (38.0V vs. 35.1V) reduces margin for 36V systems near upper rail tolerance | Select SMBJ36A only if design requires tighter VBR tolerance (±5%) and can accept 1.7V higher clamping |
| 1.5SMC39A | Same VBR (35.1–42.9V) and VC (56.4V), but DO-214AB (SMC) package - 2.5mm wider, 0.2mm thicker | Larger footprint increases PCB area; not drop-in compatible without layout revision | Choose 1.5SMC39A only when higher thermal mass is needed for repetitive surge duty cycles |
Compared with P6SMB39, SMBJ36A offers tighter VBR control but sacrifices clamping performance, while 1.5SMC39A matches electrical specs exactly but demands PCB redesign - making P6SMB39 optimal for space-constrained SMB layouts requiring proven ISO 7637-2 immunity.
Availability
P6SMB39 is available at Aetrix Electronics and suitable for switching mode power supplies, AC-DC adapters, and television power boards requiring stable component supply, full traceability, and automotive-grade surge resilience.
Supply support for P6SMB39 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 industrial and consumer markets.
The P6SMB series targets cost-sensitive, high-volume board-level surge protection with validated ISO 7637-2 compliance and J-STD-020 Level 1 process compatibility - optimized for automated manufacturing of power supplies and display electronics.
FAQ
What is the maximum clamping voltage of P6SMB39 under standard 10/1000μs surge conditions?
The P6SMB39 has a maximum clamping voltage (VC) of 56.4V when subjected to its rated peak pulse current of 11.1A using the 10/1000μs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that downstream components see no more than 56.4V during a full-power transient event. The P6SMB39 achieves this while maintaining a low clamping ratio of ~1.42 relative to its minimum breakdown voltage.
Is P6SMB39 suitable for bidirectional transient suppression?
No, P6SMB39 is a unidirectional TVS diode intended for DC rail protection with defined anode/cathode polarity. For bidirectional applications such as AC lines or data lines with symmetric transients, the bipolar variant P6SMB39A (with "A" suffix) must be used. The P6SMB39 lacks symmetrical breakdown characteristics and will conduct heavily in forward bias beyond its 3.5V forward voltage, potentially failing under reverse-polarity surges.
What is the reverse leakage current specification for P6SMB39 at its stand-off voltage?
The P6SMB39 specifies a maximum reverse leakage current (ID) of 1μA when biased at its rated stand-off voltage (VWM) of 31.6V. This ultra-low leakage ensures minimal power loss in always-on 24V/36V rails and preserves battery life in standby modes. Measured at TA = 25°C, leakage remains below 5μA even at +85°C ambient, supporting industrial temperature operation.
Does P6SMB39 meet automotive surge immunity standards?
Yes, the P6SMB39 is explicitly tested and compliant with ISO 7637-2 for Pulse 1 (inductive load dump), Pulse 2a/2b (battery connection/disconnection), and Pulse 3a/3b (capacitive coupling). Its 600W peak pulse power rating, 1.0ps response time, and stable VBR temperature coefficient (0.100%/°C) make it suitable for 12V/24V automotive subsystems including infotainment power supplies and body control modules - provided layout follows recommended pad geometry and grounding practices.
What packaging and reel quantity is offered for P6SMB39?
P6SMB39 is supplied in DO-214AA (SMB) package on 3,000-piece tape-and-reel format, compatible with standard SMT pick-and-place equipment. The reel meets EIA-481-D standards, with matte tin-plated leads solderable per J-STD-002. Each reel includes full traceability documentation, and Aetrix Electronics provides lot-level conformance reports upon request for P6SMB39 shipments.
P6SMB39 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):
- 31.6V
- Voltage - Breakdown (Min):
- 35.1V
- Voltage - Clamping (Max) @ Ipp:
- 56.4V
- Current - Peak Pulse (10/1000µs):
- 11.1A
- 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)
P6SMB39 FAQ
1.How can I place an order for P6SMB39 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB39 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 P6SMB39 reliable?
The price and inventory of P6SMB39 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB39 is usually 5 days.
3.What payment methods are accepted for P6SMB39?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB39 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB39?
P6SMB39 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB39 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 P6SMB39?
For technical support, including P6SMB39 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB39 requirements.
6.How does Aetrix verify that P6SMB39 is sourced from the original manufacturer or authorized distributors?
All P6SMB39 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 P6SMB39 meets industry standards.
7.What is the process for return or replacement of P6SMB39?
All P6SMB39 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB39, 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 P6SMB39 part is unused and in its original packaging.
Return procedure for P6SMB39:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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