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onsemi P6SMB36AT3
- Part No.:
- P6SMB36AT3
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- -
- Datasheet:
-
P6SMB36AT3.pdf
- Description:
- TVS ZENER UNIDIR 600W 36V SMB
- Quantity:
- Payment:
- Shipping:
Inventory:6,446
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Product details
Overview
P6SMB36AT3 from ON Semiconductor is a unidirectional 600 W transient voltage suppressor (TVS) diode designed for parallel overvoltage protection of DC power rails and signal lines. It features a 30.8 V working peak reverse voltage (VRWM), 36 V nominal Zener breakdown voltage (VBR) at 1 mA test current, clamps to ≤49.9 V at 12 A peak pulse current (IPP), and responds in <1 ns - making it suitable for safeguarding automotive power supplies, industrial I/O interfaces, and telecom surge protection circuits.
For engineers reviewing the P6SMB36AT3 datasheet, pinout, applications, or equivalent options, this device is selected for robust 600 W single-pulse surge immunity per IEC 61000-4-5, low leakage (<5 µA @ 30.8 V), UL 497B recognition for isolated loop protection, and SMB package compatibility with high-density PCB layouts.
Technical Context
The P6SMB36AT3 operates as a silicon avalanche diode, leveraging controlled Zener breakdown to clamp transient overvoltages above its VRWM. Its unidirectional polarity enables use on positive-rail protection only, with cathode-banded orientation required for correct installation.
It delivers 600 W peak pulse power (10/1000 µs waveform), maintains clamping voltage ≤49.9 V at 12 A IPP, exhibits thermal resistance of 226 °C/W (junction-to-ambient), and supports operating temperatures from −65 °C to +150 °C - enabling deployment in under-hood automotive and industrial control environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600 W @ 1 ms (10/1000 µs waveform); sustains single high-energy surges without failure |
| Working Peak Reverse Voltage (VRWM) | 30.8 V; maximum continuous DC or peak AC voltage the device blocks before clamping |
| Zener Breakdown Voltage (VBR) | 36 V min / 39.05 V max @ 1 mA; defines precise turn-on threshold for overvoltage triggering |
| Clamping Voltage (VC) | ≤49.9 V @ 12 A IPP; limits protected circuit voltage during surge, reducing stress on downstream ICs |
| Leakage Current (IR) | <5 µA @ 30.8 V; ensures minimal standby power loss and no false triggering in normal operation |
| Response Time | <1 ns; enables suppression before transient energy couples into sensitive analog or digital circuitry |
| ESD Rating | Class 3 (>16 kV HBM); provides built-in electrostatic discharge resilience during handling and assembly |
Pinout & Package
Package: SMB (Case 403A), surface-mount, void-free thermosetting plastic with modified L-bend leads and cathode polarity band. Dimensions: 4.06–4.60 mm (E), 3.30–3.95 mm (D), 1.90–2.45 mm (A), 0.76–1.60 mm (L).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to lower-potential side (e.g., ground or return path) in unidirectional TVS configuration |
| Cathode | Current exit terminal during reverse breakdown | Marked with band; connected to protected line (e.g., +12 V rail) to clamp overvoltage to ground |
Key Features
| Feature | Design Value |
|---|---|
| UL 497B Recognition | Qualified for isolated loop circuit protection - meets safety-critical telecom and industrial isolation requirements |
| Pb-Free Construction | G-suffix variant complies with RoHS; compatible with lead-free reflow profiles up to 260 °C for 10 s |
| Low Clamping Ratio | VC/VBR ≈ 1.39 (49.9 V / 36 V); tight voltage margin ensures effective protection without excessive headroom |
| High Surge Robustness | Withstands 100 A non-repetitive forward surge (IFSM); survives accidental reverse polarity or load dump events |
| Thermal Stability | Max TJ = +150 °C; stable performance in engine-control units, motor drives, and outdoor power systems |
Applications
| Automotive Power Rail Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: Protecting 24 V CAN bus power supply against load dump transients per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS placed between +24 V rail and chassis ground to clamp spikes up to 120 V. Use Value: Limits voltage seen by downstream DC/DC converters and CAN transceivers to ≤49.9 V, preventing latch-up or permanent damage. |
Use Scenario: Shielding 24 V digital input channels in programmable logic controllers from field-wiring induced surges. IC Role / Device Role / Timing Role: Parallel-connected TVS on each opto-isolator input line to absorb fast EFT bursts (IEC 61000-4-4). Use Value: Sub-1 ns response prevents false triggering of input latches and ensures deterministic state capture during noise events. |
| Telecom Line Interface Protection | Medical Equipment Power Entry |
Use Scenario: Safeguarding Ethernet PHY power pins (e.g., +3.3 V bias) against lightning-induced surges coupled via PoE magnetics. IC Role / Device Role / Timing Role: Localized TVS on secondary-side DC rails adjacent to RJ45 connector to minimize trace inductance. Use Value: 600 W rating handles multi-kV common-mode transients while low capacitance avoids signal integrity degradation. |
Use Scenario: Protecting auxiliary 5 V/12 V internal power rails in diagnostic imaging equipment from ESD and switching transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp on isolated DC-DC output stage feeding FPGA or ADC subsystems. Use Value: UL 497B certification validates compliance with medical electrical equipment safety standards for patient-connected devices. |
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 SMB package, identical VRWM (30.8 V) and VC (49.9 V), but rated for 600 W with tighter VBR tolerance (36.0–39.0 V vs. 36.0–39.05 V) | No functional difference; validated for identical IEC 61000-4-5 Level 4 testing | Select SMBJ36A if tighter VBR binning is required for precision clamping thresholds |
| 1.5SMC36A | Larger SMC package (7.1 × 6.2 mm vs. 4.6 × 3.95 mm), same electrical specs, higher thermal mass (RJA = 150 °C/W vs. 226 °C/W) | Better sustained power handling in high-ambient-temperature enclosures; requires larger PCB footprint | Choose 1.5SMC36A when board layout allows extra space and long-duration surge immunity is prioritized over density |
Compared with SMBJ36A and 1.5SMC36A, the P6SMB36AT3 offers optimal balance of compact SMB footprint, certified UL 497B compliance, and proven 600 W surge capability - making it preferred for space-constrained industrial and automotive modules where regulatory validation is mandatory.
Availability
P6SMB36AT3 is available at Aetrix Electronics and suitable for automotive electronics, industrial PLCs, and telecom infrastructure requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P6SMB36AT3 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
ON Semiconductor (now onsemi) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensor, and connectivity solutions for automotive, industrial, and cloud power applications.
The P6SMB36AT3 belongs to the P6SMBxxAT3 series - engineered specifically for high-reliability, high-surge-capacity transient suppression in harsh environments, with emphasis on UL-certified protection for safety-critical systems.
FAQ
What is the maximum clamping voltage of the P6SMB36AT3 at its rated peak pulse current?
The P6SMB36AT3 clamps to a maximum of 49.9 V at its specified peak pulse current of 12 A (10/1000 µs waveform). This value is measured under standardized surge conditions and ensures downstream components experience limited overvoltage stress. The clamping voltage is confirmed in the Electrical Characteristics table on page 3 of the ON Semiconductor datasheet for the P6SMB6.8AT3 Series, where P6SMB36AT3,G is explicitly listed with VC = 49.9 V.
Is the P6SMB36AT3 suitable for bidirectional transient suppression?
No, the P6SMB36AT3 is a unidirectional TVS diode and is not suitable for bidirectional suppression. Its design protects only against positive-going transients on the cathode side relative to anode. For bidirectional applications - such as AC line protection or differential data lines - ON Semiconductor specifies separate parts like P6SMB36CAT3. Using P6SMB36AT3 in a bidirectional configuration risks failure during negative transients.
Does the P6SMB36AT3 meet UL 497B certification, and what does that mean for system design?
Yes, the entire P6SMB6.8AT3 Series - including P6SMB36AT3 - holds UL 497B recognition (File #E210057) for protectors used in isolated loop circuits. This certification verifies successful completion of strike voltage breakdown, endurance conditioning, dielectric withstand, and discharge tests - meaning P6SMB36AT3 can be used in safety-critical telecom and medical isolation barriers without requiring additional external certification effort.
What is the thermal resistance and maximum junction temperature rating of the P6SMB36AT3?
The P6SMB36AT3 has a junction-to-ambient thermal resistance (RJA) of 226 °C/W under standard FR-4 board conditions and a maximum junction temperature (TJ) rating of +150 °C. Its junction-to-lead resistance (RJL) is 40 °C/W. These values define safe power derating curves - for example, at 75 °C ambient, the device must be derated to 25 mW/°C above that point to avoid exceeding TJmax.
How does the P6SMB36AT3 compare to the P6SMB36AT3G variant?
The P6SMB36AT3 and P6SMB36AT3G share identical electrical specifications, package dimensions, and performance characteristics. The "G" suffix solely indicates Pb-free (RoHS-compliant) construction and qualifies the part for lead-free reflow soldering (up to 260 °C for 10 seconds). Both variants are functionally interchangeable in designs; selection depends only on environmental compliance requirements and assembly process constraints.
P6SMB36AT3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- -
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- -
- Unidirectional Channels:
- -
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- -
- Voltage - Breakdown (Min):
- -
- Voltage - Clamping (Max) @ Ipp:
- -
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- -
- Power Line Protection:
- -
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
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- Supplier Device Package:
- -
P6SMB36AT3 FAQ
1.How can I place an order for P6SMB36AT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB36AT3 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 P6SMB36AT3 reliable?
The price and inventory of P6SMB36AT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB36AT3 is usually 5 days.
3.What payment methods are accepted for P6SMB36AT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB36AT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB36AT3?
P6SMB36AT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB36AT3 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 P6SMB36AT3?
For technical support, including P6SMB36AT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB36AT3 requirements.
6.How does Aetrix verify that P6SMB36AT3 is sourced from the original manufacturer or authorized distributors?
All P6SMB36AT3 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 P6SMB36AT3 meets industry standards.
7.What is the process for return or replacement of P6SMB36AT3?
All P6SMB36AT3 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB36AT3, 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 P6SMB36AT3 part is unused and in its original packaging.
Return procedure for P6SMB36AT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB36AT3 Tags
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