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onsemi P6SMB62AT3
- Part No.:
- P6SMB62AT3
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB62AT3.pdf
- Description:
- TVS DIODE 53VWM 85VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:4,185
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Product details
Overview
P6SMB62AT3 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 53 V working peak reverse voltage (VRWM), 62 V nominal Zener breakdown voltage (VBR) at 1 mA, clamps to ≤85 V at 7.1 A peak pulse current (IPP), and responds in <1 ns - making it suitable for safeguarding automotive power supplies, industrial I/O ports, and telecom interface circuits against ESD and lightning-induced surges.
For engineers reviewing the P6SMB62AT3 datasheet, pinout, applications, or equivalent options, key selection criteria include its VRWM margin above system operating voltage, clamping ratio (VC/VBR = 1.37), UL 497B recognition for isolated loop protection, and SMB package compatibility with high-density PCB layouts requiring robust surge immunity without active circuitry.
Technical Context
The P6SMB62AT3 operates as a silicon avalanche diode, leveraging controlled Zener breakdown to shunt transient energy away from protected circuitry. Its low zener impedance (<1 Ω typical) and fast response ensure minimal overshoot during sub-microsecond transients, while its 600 W peak power rating (10/1000 µs waveform) supports compliance with IEC 61000-4-5 Level 4 surge testing.
It is rated for −65 °C to +150 °C operation, features <5 µA leakage at VRWM, and maintains stable VBR with a temperature coefficient of 0.104 %/°C. The device is Pb-free, RoHS-compliant, and supplied in ON Semiconductor's SURMETIC® SMB package - optimized for thermal dissipation and solderability on FR-4 boards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600 W @ 1 ms (10/1000 µs waveform); enables robust protection against IEC 61000-4-5 surges up to 4 kV line-to-ground. |
| Working Peak Reverse Voltage (VRWM) | 53 V; must be ≥ system DC operating voltage to avoid leakage conduction during normal operation. |
| Zener Breakdown Voltage (VBR) | 62 V min / 65.1 V max @ 1 mA; defines precise clamping onset threshold under standardized test conditions. |
| Clamping Voltage (VC) | ≤85 V @ IPP = 7.1 A; determines maximum voltage seen by downstream components during worst-case transient. |
| Leakage Current (IR) | <5 µA @ 53 V; ensures negligible standby power loss and no interference with high-impedance sensing nodes. |
| Response Time | <1 ns; limits voltage overshoot before clamping engages, critical for protecting fast logic and analog interfaces. |
| ESD Rating | Class 3 (>16 kV HBM); qualifies for direct handling in uncontrolled environments without additional ESD mitigation. |
Pinout & Package
Package: SMB (Case 403A), surface-mount, unidirectional, cathode-indicated by band. Dimensions: 4.32 mm × 3.56 mm × 2.13 mm (L × W × H). Lead finish: matte tin, solderable at 260 °C for 10 s.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; completes current path during transient clamp event. |
| Cathode | High-side transient input | Connected to protected line (e.g., 48 V rail or RS-485 bus); carries full surge current into anode during breakdown. |
Key Features
| Feature | Design Value |
|---|---|
| UL 497B Recognition | Qualified for isolated loop circuit protection per QVGQ2 file #E210057 - eliminates need for external certification in telecom and industrial safety-critical designs. |
| Low Clamping Ratio | VC/VBR ≈ 1.37 (85 V / 62 V); minimizes stress on downstream ICs compared to higher-ratio TVS devices. |
| Thermal Robustness | RJL = 40 °C/W (junction-to-lead); enables effective heat transfer to PCB copper, supporting sustained surge duty in compact layouts. |
| Pb-Free & RoHS Compliant | Meets JEDEC J-STD-020 moisture sensitivity level 1; compatible with lead-free reflow profiles and environmental compliance programs. |
| High Surge Current Capability | IPP = 7.1 A (10/1000 µs); withstands repeated 2 kA surge events when derated per Figure 3 in ambient >25 °C. |
Applications
| Industrial PLC I/O Protection | Automotive Body Control Module (BCM) Power Rail |
|---|---|
Use Scenario: Protecting 24 V DC digital input channels in programmable logic controllers from inductive kickback and EFT bursts. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between input terminal and chassis ground, clamping transients before they reach optocoupler or microcontroller GPIO. Use Value: Prevents false triggering and latch-up in field-connected sensors by limiting voltage to ≤85 V during 1 kV/500 A surge events per IEC 61000-4-4. |
Use Scenario: Safeguarding 12 V/24 V supply inputs to BCM ECUs against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main power entry point, coordinated with upstream fuse and downstream LDO regulators. Use Value: Absorbs up to 600 W of transient energy without failure, maintaining system uptime during alternator load dump (test pulse 5a). |
| Telecom Ethernet Port Surge Suppression | Medical Equipment AC/DC Adapter Input |
Use Scenario: Secondary-level protection on PoE-powered Ethernet switch ports subjected to lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Unidirectional TVS across differential pair (e.g., between TPS and GND) after primary gas discharge tube (GDT) stage. Use Value: Provides <1 ns response to clamp residual overshoot below 85 V, preserving PHY IC integrity where GDT alone cannot meet timing requirements. |
Use Scenario: Input-stage transient suppression on medical-grade AC/DC adapters rated for BF (Body Floating) applications. IC Role / Device Role / Timing Role: UL 497B-recognized TVS on secondary-side DC output (e.g., 5 V or 12 V rail) to prevent fault propagation to patient-connected circuits. Use Value: Meets isolation barrier surge immunity requirements without compromising creepage/clearance, due to validated protector-class certification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64A | VRWM = 64 V, VBR = 71.1 V min, VC = 103 V @ 5.8 A; same SMB package but higher clamping voltage. | Less margin for 48 V systems near upper rail limit; better suited for 60 V nominal buses. | Select SMBJ64A only if system operating voltage exceeds 53 V and clamping headroom >103 V is acceptable. |
| 1.5SMC62A | Same VRWM (53 V) and VBR (62 V), but DO-214AB package (larger footprint, RJA = 226 °C/W vs. 40 °C/W). | Lower thermal performance; requires larger copper pour or forced airflow for repeated surges. | Choose 1.5SMC62A only when legacy DO-214AB layout exists and surge duty cycle is infrequent. |
Compared with SMBJ64A and 1.5SMC62A, the P6SMB62AT3 delivers optimal balance of low clamping voltage (85 V), superior thermal coupling (RJL = 40 °C/W), and UL 497B certification - making it preferred for space-constrained, high-reliability 48 V industrial and automotive applications where both electrical and safety compliance are mandatory.
Availability
P6SMB62AT3 is available at Aetrix Electronics and suitable for industrial PLC I/O protection, automotive body control module power rails, and telecom Ethernet port surge suppression requiring stable component supply, long-term lifecycle support, and certified surge immunity.
Supply support for P6SMB62AT3 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 infrastructure markets.
The P6SMB62AT3 belongs to the P6SMBxxAT3 series of unidirectional TVS diodes engineered for high-energy transient suppression in harsh environments - with design focus on UL-certified reliability, low clamping ratio, and SMB package manufacturability for high-volume industrial assembly.
FAQ
What is the maximum clamping voltage of the P6SMB62AT3 under standard test conditions?
The P6SMB62AT3 has a maximum clamping voltage (VC) of 85 V when subjected to its specified peak pulse current (IPP) of 7.1 A using the 10/1000 µs waveform. This value is measured at TA = 25 °C and represents the highest voltage the device allows across its terminals during a transient event - a critical parameter for ensuring downstream components remain within their absolute maximum ratings. The P6SMB62AT3 achieves this clamping performance while maintaining low leakage and fast response.
Is the P6SMB62AT3 suitable for bidirectional transient protection?
No, the P6SMB62AT3 is a unidirectional TVS diode and is not suitable for bidirectional protection. Its polarity is fixed: cathode must be connected to the protected line and anode to ground. For bidirectional applications - such as AC signal lines or differential data buses - ON Semiconductor offers the P6SMB62CAT3 variant. Using the P6SMB62AT3 in reverse-biased configurations risks permanent damage due to lack of symmetrical avalanche capability. Always verify polarity alignment in schematic and layout for the P6SMB62AT3.
Does the P6SMB62AT3 meet UL 497B certification, and what does that mean for my design?
Yes, the P6SMB62AT3 is UL 497B recognized under File #E210057 in the "Protector" category (QVGQ2), covering isolated loop circuit protection. This means it has passed rigorous tests including strike voltage breakdown, endurance conditioning, dielectric withstand, and discharge validation - not just flammability. For your design, UL 497B recognition eliminates the need for additional system-level surge certification when used per manufacturer guidelines, accelerating time-to-market for telecom, industrial, and medical equipment requiring safety-agency approval.
What is the thermal resistance from junction-to-lead (RJL) for the P6SMB62AT3, and why does it matter?
The P6SMB62AT3 has a thermal resistance from junction-to-lead (RJL) of 40 °C/W, measured with zero lead length on a 1″ square copper pad (FR-4 board). This low value indicates efficient heat transfer from the silicon die to the PCB copper via the leads - critical for sustaining multiple surge events without thermal runaway. In contrast, junction-to-ambient (RJA) is 226 °C/W, highlighting why proper PCB copper area and thermal vias are essential. RJL directly impacts reliability in high-duty-cycle surge environments for the P6SMB62AT3.
Can the P6SMB62AT3 be used in automotive applications, and which standards does it support?
Yes, the P6SMB62AT3 is widely used in automotive applications including body control modules, infotainment power supplies, and sensor interfaces. It supports ISO 7637-2 Pulse 1 (inductive load dump suppression), IEC 61000-4-2 ESD (±15 kV air, ±8 kV contact), and IEC 61000-4-4 EFT (40 A, 5/50 ns). Its −65 °C to +150 °C operating range, Pb-free construction, and AEC-Q200–compatible material set make it suitable for under-hood and cabin environments - provided layout follows best practices for minimizing inductive overshoot in the P6SMB62AT3 installation.
P6SMB62AT3 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):
- 53V
- Voltage - Breakdown (Min):
- 58.9V
- Voltage - Clamping (Max) @ Ipp:
- 85V
- Current - Peak Pulse (10/1000µs):
- 7.1A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 335pF @ 1MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
P6SMB62AT3 FAQ
1.How can I place an order for P6SMB62AT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB62AT3 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 P6SMB62AT3 reliable?
The price and inventory of P6SMB62AT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB62AT3 is usually 5 days.
3.What payment methods are accepted for P6SMB62AT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB62AT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB62AT3?
P6SMB62AT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB62AT3 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 P6SMB62AT3?
For technical support, including P6SMB62AT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB62AT3 requirements.
6.How does Aetrix verify that P6SMB62AT3 is sourced from the original manufacturer or authorized distributors?
All P6SMB62AT3 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 P6SMB62AT3 meets industry standards.
7.What is the process for return or replacement of P6SMB62AT3?
All P6SMB62AT3 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB62AT3, 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 P6SMB62AT3 part is unused and in its original packaging.
Return procedure for P6SMB62AT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB62AT3 Tags
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