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onsemi P6SMB27AT3
- Part No.:
- P6SMB27AT3
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB27AT3.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:4,433
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Product details
Overview
P6SMB27AT3 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 23.1 V working peak reverse voltage (VRWM), 27 V nominal Zener breakdown voltage (VBR) at 1 mA test current, and clamps transients to ≤37.5 V at 16 A peak pulse current (IPP), making it suitable for automotive power line surge suppression and industrial I/O port protection.
For engineers reviewing the P6SMB27AT3 datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM margin above operating voltage, clamping voltage vs. protected device's absolute maximum rating, peak pulse current capability under 1 ms 10/1000 µs waveform, and UL 497B recognition for isolated loop circuit protection.
Technical Context
The P6SMB27AT3 operates as a silicon avalanche diode in reverse-biased mode, triggering when transient voltage exceeds its specified VBR. Its low zener impedance and <1 ns response time enable rapid clamping of fast-rising ESD and lightning-induced surges.
It is rated for 600 W non-repetitive peak pulse power (10/1000 µs waveform), supports 100 A forward surge current (8.3 ms half-sine), and exhibits <5 µA leakage at VRWM - critical for low-power standby circuits where quiescent current must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 23.1 V - maximum continuous reverse voltage before significant leakage; must exceed system's DC operating voltage to avoid false triggering |
| VBR @ IT = 1 mA | 27.05 V (min) to 28.4 V (max) - precise breakdown threshold defining turn-on onset under standardized test conditions |
| VC @ IPP = 16 A | 37.5 V - clamped voltage during 10/1000 µs surge; determines maximum stress imposed on downstream ICs |
| PPK | 600 W - peak power handling for 1 ms transient; defines survivability against high-energy surges like ISO 7637-2 Pulse 5a |
| IR @ VRWM | 5 µA max - ultra-low reverse leakage ensures minimal power loss in battery-backed or energy-sensitive applications |
| ESD Rating | Class 3 (>16 kV HBM) - qualifies for direct ESD protection on exposed connectors without external series impedance |
| UL Recognition | UL 497B (QVGQ2) - certified for use in isolated loop circuit protection, including telecom and process control interfaces |
Pinout & Package
Package: SMB (Case 403A), surface-mount, Pb-free, void-free thermosetting plastic with modified L-bend leads and cathode polarity band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current return path during clamping | Connected to ground or low-impedance reference plane; forms low-inductance return path essential for effective surge dissipation |
| Cathode | Transient voltage sensing node | Connected to protected line (e.g., 24 V rail); polarity band identifies this terminal; reverse bias enables avalanche conduction during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Enables robust protection against severe transients such as load dump (ISO 16750-2) and inductive switching spikes in 24 V automotive systems |
| <1 ns response time | Minimizes voltage overshoot before clamping engages, reducing risk of damage to fast-edge logic and microcontrollers |
| UL 497B certification | Validates compliance for safety-critical isolated loop applications including analog sensor inputs and fieldbus interfaces |
| Low leakage (<5 µA) | Preserves battery life in always-on monitoring circuits and avoids false trips in high-impedance signal conditioning paths |
| SURMETIC® package reliability | Proven thermal cycling and moisture resistance per J-STD-020, supporting long-term operation in industrial temperature ranges (−65°C to +150°C) |
Applications
| Automotive Power Rail Protection | Industrial Analog Input Protection |
|---|---|
|
Use Scenario: Protecting 24 V supply lines in engine control units against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between rail and chassis ground to clamp positive-going transients only. Use Value: Clamps to 37.5 V at 16 A, staying well below 40 V absolute maximum ratings of common PMICs and CAN transceivers. |
Use Scenario: Safeguarding 4–20 mA current loop inputs in PLC analog modules from induced surges on field wiring. IC Role / Device Role / Timing Role: Reverse-biased across input terminals to shunt surge energy before reaching precision op-amps and ADC front-ends. Use Value: UL 497B recognition confirms suitability for isolated loop protection, and 23.1 V VRWM matches typical loop supply headroom. |
| Medical Equipment ESD Protection | Telecom Interface Surge Suppression |
|
Use Scenario: Shielding USB and serial communication ports on patient monitors from human-body-model ESD events. IC Role / Device Role / Timing Role: Parallel-connected TVS on VBUS and data lines to divert >16 kV HBM discharges away from USB PHY ICs. Use Value: Class 3 ESD rating and sub-1 ns response prevent latch-up or gate oxide damage in sensitive interface ICs. |
Use Scenario: Front-end protection for RS-485 transceivers in building automation controllers exposed to lightning-induced surges on twisted-pair cabling. IC Role / Device Role / Timing Role: Bidirectional protection not required; unidirectional P6SMB27AT3 used on VCC-supply side with series impedance to limit current into transceiver VDD pin. Use Value: 600 W rating handles multi-kA surge currents defined in IEC 61000-4-5 Level 4, while low capacitance avoids signal integrity degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A | Lower peak power (400 W), higher VRWM (24 V), same SMB package | Less margin for high-energy transients like load dump; suitable only for lower-risk 24 V systems | Select when cost sensitivity outweighs need for 600 W surge headroom and UL 497B certification is not required |
| 1.5SMC27A | Same 27 V VBR but SMC package (larger footprint), 1500 W rating | Higher power handling but incompatible PCB layout; requires redesign for space-constrained designs | Choose only if system-level testing confirms need for >600 W clamping and board area permits SMC footprint |
Compared with SMAJ24A and 1.5SMC27A, the P6SMB27AT3 uniquely balances 600 W surge capability, UL 497B certification, SMB footprint compatibility, and 23.1 V VRWM - making it optimal for space-constrained industrial and automotive modules requiring certified, reliable overvoltage protection without layout change.
Availability
P6SMB27AT3 is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLC analog inputs, medical device USB ports, and telecom RS-485 interfaces requiring stable component supply across extended product lifecycles.
Supply support for P6SMB27AT3 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, sensors, and connectivity solutions for automotive, industrial, and cloud power applications.
The P6SMB27AT3 belongs to the P6SMBxxAT3 series of unidirectional TVS diodes engineered for high-reliability surge suppression in harsh environments - targeting design-in for automotive power systems, industrial control I/O, and certified medical equipment.
FAQ
What is the working peak reverse voltage (VRWM) of the P6SMB27AT3?
The P6SMB27AT3 has a VRWM of 23.1 V, meaning it remains in high-impedance blocking mode up to this voltage under normal operation. This value ensures compatibility with 24 V systems where transient-free DC operation must be maintained, and provides sufficient margin above nominal rail voltage to prevent leakage-related power loss or false triggering.
Does the P6SMB27AT3 meet UL safety standards?
Yes, the P6SMB27AT3 is UL 497B recognized (File #E210057, category QVGQ2) for isolated loop circuit protection. This certification covers rigorous testing including strike voltage breakdown, endurance conditioning, dielectric withstand, and discharge performance - confirming its suitability for safety-critical applications like industrial process controls and medical sensor interfaces.
What is the clamping voltage of the P6SMB27AT3 at its rated peak pulse current?
The P6SMB27AT3 clamps to a maximum of 37.5 V at 16 A peak pulse current (IPP), measured using the standard 10/1000 µs waveform. This clamping voltage directly determines the maximum stress imposed on protected components; for example, it stays safely below the 40 V absolute maximum rating of common 24 V automotive transceivers and PMICs.
Is the P6SMB27AT3 RoHS-compliant and lead-free?
Yes, the "G" suffix in P6SMB27AT3G denotes a Pb-free package compliant with RoHS Directive 2011/65/EU. The device uses ON Semiconductor's SURMETIC® molding compound and meets JEDEC J-STD-020 moisture sensitivity level (MSL) 1 requirements, enabling standard reflow soldering at 260°C for 10 seconds without popcorn effect.
How does the P6SMB27AT3 compare to bidirectional TVS diodes?
The P6SMB27AT3 is unidirectional and protects against positive-going transients only - ideal for DC power rails where reverse polarity is not expected. Unlike bidirectional variants (e.g., P6SMB27CAT3), it offers lower leakage and tighter VBR tolerance, but cannot suppress negative surges. Use P6SMB27AT3 when protecting grounded 24 V supplies; select bidirectional versions only for AC-coupled or floating signal lines.
P6SMB27AT3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-214AA, SMB
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 23.1V
- Voltage - Breakdown (Min):
- 25.7V
- Voltage - Clamping (Max) @ Ipp:
- 37.5V
- Current - Peak Pulse (10/1000µs):
- 16A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 700pF @ 1MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
P6SMB27AT3 FAQ
1.How can I place an order for P6SMB27AT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB27AT3 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 P6SMB27AT3 reliable?
The price and inventory of P6SMB27AT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB27AT3 is usually 5 days.
3.What payment methods are accepted for P6SMB27AT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB27AT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB27AT3?
P6SMB27AT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB27AT3 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 P6SMB27AT3?
For technical support, including P6SMB27AT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB27AT3 requirements.
6.How does Aetrix verify that P6SMB27AT3 is sourced from the original manufacturer or authorized distributors?
All P6SMB27AT3 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 P6SMB27AT3 meets industry standards.
7.What is the process for return or replacement of P6SMB27AT3?
All P6SMB27AT3 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB27AT3, 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 P6SMB27AT3 part is unused and in its original packaging.
Return procedure for P6SMB27AT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB27AT3 Tags
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onsemi
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