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onsemi P6SMB75AT3G
- Part No.:
- P6SMB75AT3G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB75AT3G.pdf
- Description:
- TVS DIODE 64.1V 103V SMB
- Quantity:
- Payment:
- Shipping:
Inventory:40,969
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Product details
Overview
P6SMB75AT3G from ON Semiconductor is a unidirectional 600 W transient voltage suppressor (TVS) diode designed for overvoltage protection in DC power rails and signal lines. It features a 64.1 V working peak reverse voltage (VRWM), 75 V breakdown voltage (VBR) at 1 mA test current, clamps to 103 V at 5.8 A peak pulse current, and delivers sub-1 ns response time with <5 µA leakage above 10 V. It is widely deployed in automotive power supply inputs and industrial PLC I/O modules.
For engineers reviewing the P6SMB75AT3G datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM margin vs. system operating voltage, clamping voltage headroom relative to protected IC absolute maximum ratings, surge current capability under 10/1000 µs waveform, thermal derating at elevated ambient temperatures, and UL 497B recognition for isolated loop circuit protection.
Technical Context
The P6SMB75AT3G operates as a Zener-based avalanche clamp, triggered when reverse voltage exceeds its specified breakdown threshold. Its low zener impedance ensures stable clamping under high-energy transients, while its thermally robust SURMETIC® SMB package enables reliable 600 W peak power dissipation at 25°C ambient with defined derating above 75°C junction temperature.
It complies with AEC-Q101 for automotive use and meets Class 3 ESD immunity (>16 kV HBM). The device exhibits negligible junction capacitance (280 pF at 0 V bias), making it suitable for moderate-speed data lines and DC power rails where capacitive loading must remain below ~300 pF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 64.1 V - Maximum continuous reverse voltage before significant leakage; must exceed system's max DC operating voltage by ≥10%. |
| VBR @ IT = 1 mA | 75.05 V (min) to 95.5 V (max) - Breakdown occurs within this band; defines turn-on threshold tolerance. |
| VC @ IPP = 5.8 A | 103 V - Clamped voltage during 10/1000 µs surge; determines worst-case stress on downstream components. |
| IPP | 5.8 A - Peak pulse current supported at 10/1000 µs waveform; correlates directly to 600 W peak power rating. |
| Leakage @ VRWM | <5 µA - Ensures minimal standby power loss and no interference with high-impedance sensing circuits. |
| Response Time | <1 ns - Enables suppression of fast-rising ESD and lightning-induced transients before protected circuitry responds. |
| UL Recognition | UL 497B QVGQ2 - Certified for isolated loop circuit protection; validates performance under strike voltage, endurance, and dielectric tests. |
Pinout & Package
SMB (Case 403A) surface-mount package: 2.30 mm × 3.56 mm × 1.02 mm body, cathode indicated by polarity band, modified L-bend leads for enhanced pad adhesion, Pb-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference node for reverse-biased operation | Connected to system ground or low-side return path; establishes reference for clamping action. |
| Cathode | High-side connection point | Connected to protected line (e.g., 48 V rail input); conducts surge current to ground when voltage exceeds VRWM. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Supports IEC 61000-4-5 Level 4 (4 kV, 2 Ω source) surge testing on 24–48 V systems without failure. |
| AEC-Q101 qualified | Validated for automotive under-hood and powertrain applications requiring extended temperature range (−65°C to +150°C). |
| UL 497B recognition | Approved for use in safety-critical isolated loop interfaces (e.g., 4–20 mA sensor transmitters) per industrial safety standards. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage overshoot during surge events, preserving margin for ICs rated to 120 V absolute maximum. |
| ESD immunity >16 kV HBM | Withstands direct human-body model discharges common in manufacturing and field service environments. |
Applications
| Automotive Power Input Protection | Industrial 4–20 mA Loop Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs against load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed across input rail to shunt surge energy to chassis ground before reaching DC-DC converter input stage. Use Value: Clamps 100 V+ load dump spikes to ≤103 V, preventing damage to upstream MOSFETs and regulators rated to 100 V. | Use Scenario: Safeguarding analog input terminals of PLC analog I/O modules connected to field sensors. IC Role / Device Role / Timing Role: Parallel-connected TVS on 4–20 mA loop terminals to absorb induced surges from nearby motor switching or lightning coupling. Use Value: UL 497B certification ensures compliance with loop isolation integrity requirements while limiting terminal voltage to safe levels during 1 kV/500 A surge events. |
| Medical Equipment Power Rails | Telecom DC Feeder Protection |
Use Scenario: Securing auxiliary 5 V/12 V rails in diagnostic imaging devices exposed to ESD during operator interaction. IC Role / Device Role / Timing Role: Low-leakage TVS on secondary-side power distribution nodes to prevent latch-up or gate oxide damage in precision analog front-ends. Use Value: Sub-5 µA leakage at 64.1 V avoids signal offset drift in µA-level current-sensing paths used in patient monitoring circuits. | Use Scenario: Protecting -48 V DC power feeds in telecom base station remote radio units subject to lightning-induced longitudinal surges. IC Role / Device Role / Timing Role: Bidirectional protection not required; unidirectional P6SMB75AT3G placed between -48 V rail and ground to clamp positive-going transients only. Use Value: 64.1 V VRWM provides 15% margin above nominal -48 V rail, enabling reliable operation without false triggering during normal voltage ripple. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ75A | Same SMB package, 600 W rating, but 75 V VBR min/max tighter (71.3–78.8 V); slightly higher VC (105 V @ 5.7 A). | Marginally higher clamping voltage reduces protected IC headroom; identical thermal and footprint compatibility. | Select SMAJ75A only if tighter VBR tolerance is required and 2 V higher VC is acceptable in system design. |
| 1.5SMC75A | Larger SMC package (7.1 mm × 6.2 mm), same 75 V VBR range, 100 V VC @ 6 A, higher thermal mass supports longer surge durations. | Requires PCB layout change; preferred for high-reliability industrial systems needing extended surge endurance beyond 1 ms. | Choose 1.5SMC75A when board space allows and sustained surge energy handling (e.g., repeated 10/1000 µs pulses) is critical. |
Compared with SMAJ75A and 1.5SMC75A, the P6SMB75AT3G offers optimal balance of compact SMB footprint, UL 497B certification, and proven AEC-Q101 qualification-making it the preferred choice for space-constrained automotive and industrial designs requiring regulatory-compliant transient protection.
Availability
P6SMB75AT3G is available at Aetrix Electronics and suitable for automotive control units, industrial PLC I/O modules, medical diagnostic power supplies, and telecom DC feeder systems requiring stable component supply and long-term lifecycle assurance.
Supply support for P6SMB75AT3G 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 is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The P6SMB75AT3G belongs to ON Semiconductor's P6SMBxxAT3G series of unidirectional TVS diodes, engineered specifically for high-reliability overvoltage protection in harsh environments where AEC-Q101 qualification, UL 497B recognition, and 600 W surge capability are mandatory.
FAQ
What is the working peak reverse voltage (VRWM) of the P6SMB75AT3G?
The P6SMB75AT3G has a VRWM of 64.1 V, meaning it remains in high-impedance blocking mode up to this voltage under steady-state conditions. This value is selected to provide ≥10% margin above typical 48 V or 56 V DC system rails while avoiding premature conduction during normal operation. Exceeding VRWM triggers avalanche breakdown and clamping behavior.
How does the P6SMB75AT3G compare to bidirectional TVS diodes like P6SMB75CA?
The P6SMB75AT3G is unidirectional and protects against positive transients only, with anode grounded and cathode on the protected line. In contrast, P6SMB75CA is bidirectional and handles both polarities, making it suitable for AC lines or differential signals. The P6SMB75AT3G offers lower leakage and tighter VBR tolerance than its bidirectional counterpart, but cannot suppress negative-going surges.
Is the P6SMB75AT3G suitable for automotive applications?
Yes, the P6SMB75AT3G is AEC-Q101 qualified and PPAP capable, confirming its suitability for automotive powertrain, body control, and infotainment systems. Its −65°C to +150°C operating range, load dump surge capability, and UL 497B certification align with OEM requirements for under-hood and chassis-mounted electronics.
What is the maximum clamping voltage (VC) of the P6SMB75AT3G at its rated peak pulse current?
The P6SMB75AT3G clamps to a maximum of 103 V at its rated peak pulse current of 5.8 A under the standard 10/1000 µs waveform. This VC value defines the upper voltage limit imposed on protected circuitry during surge events and must be verified against the absolute maximum ratings of downstream components such as DC-DC controllers or microcontrollers.
Does the P6SMB75AT3G require special PCB layout considerations?
Yes-effective transient suppression with the P6SMB75AT3G requires short, low-inductance traces between the device and protected node, with the cathode connected directly to the line and anode to a solid ground plane. Long traces add parasitic inductance that increases voltage overshoot during fast transients; ON Semiconductor recommends placing the P6SMB75AT3G within 5 mm of the connector or IC input it protects.
P6SMB75AT3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-214AA, SMB
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 64.1V
- Voltage - Breakdown (Min):
- 71.3V
- Voltage - Clamping (Max) @ Ipp:
- 103V
- Current - Peak Pulse (10/1000µs):
- 5.8A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 280pF @ 1MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
P6SMB75AT3G FAQ
1.How can I place an order for P6SMB75AT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB75AT3G 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 P6SMB75AT3G reliable?
The price and inventory of P6SMB75AT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB75AT3G is usually 5 days.
3.What payment methods are accepted for P6SMB75AT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB75AT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB75AT3G?
P6SMB75AT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB75AT3G 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 P6SMB75AT3G?
For technical support, including P6SMB75AT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB75AT3G requirements.
6.How does Aetrix verify that P6SMB75AT3G is sourced from the original manufacturer or authorized distributors?
All P6SMB75AT3G 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 P6SMB75AT3G meets industry standards.
7.What is the process for return or replacement of P6SMB75AT3G?
All P6SMB75AT3G units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB75AT3G, 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 P6SMB75AT3G part is unused and in its original packaging.
Return procedure for P6SMB75AT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB75AT3G Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
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D5V0H1B2LP-7B
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DESD5V0U1BB-7
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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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