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onsemi P6SMB24AT3G
- Part No.:
- P6SMB24AT3G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB24AT3G.pdf
- Description:
- TVS DIODE 20.5V 33.2V 425TEPBGA
- Quantity:
- Payment:
- Shipping:
Inventory:212,500
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Product details
Overview
P6SMB24AT3G from ON Semiconductor is a unidirectional 600 W peak power TVS diode designed for transient overvoltage protection in DC power rails and signal lines. It features a 20.5 V working peak reverse voltage (VRWM), 24 V nominal Zener breakdown voltage (VBR) at 1 mA test current, clamps to ≤33.2 V at 18 A peak pulse current (IPP), 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 P6SMB24AT3G 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, UL 497B certification for isolated loop safety, and SMB package thermal performance on FR-4 PCBs.
Technical Context
This device operates as a voltage-clamped shunt protector: under normal bias it presents high impedance (<5 µA leakage at VRWM = 20.5 V), but avalanches rapidly when transient voltage exceeds VBR = 24 V (min 22 V, max 25.2 V), diverting surge current away from downstream circuitry. Its low zener impedance and fast turn-on ensure stable clamping during 8.3 ms half-sine surges up to 100 A forward surge rating.
The SMB (Case 403A) surface-mount package enables compact placement near connectors or IC power pins, with modified L-bend leads for robust solder joint reliability and 260°C/10s reflow compatibility. Thermal resistance from junction-to-lead is 25°C/W, supporting 3.0 W DC dissipation at 75°C lead temperature - critical for sustained fault conditions in automotive and industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600 W @ 1 ms 10/1000 µs waveform - sustains single high-energy transients like ISO 7637-2 pulse 1/2/5a without failure |
| Working Peak Reverse Voltage (VRWM) | 20.5 V - sets minimum system operating voltage threshold; must exceed max steady-state rail voltage by ≥10% |
| Zener Breakdown Voltage (VBR) | 22–25.2 V @ IT = 1 mA - defines precise avalanche onset; tight tolerance ensures predictable clamping onset |
| Clamping Voltage (VC) | ≤33.2 V @ IPP = 18 A - limits voltage seen by protected ICs; 9.2 V headroom below typical 42 V automotive load-dump limit |
| Leakage Current (IR) | <5 µA @ VRWM = 20.5 V - negligible standby power loss; avoids false triggering in low-power sensor circuits |
| Response Time | <1 ns - faster than most ESD events; ensures clamping before sensitive logic thresholds are violated |
| ESD Rating | Class 3 (>16 kV HBM) - meets IEC 61000-4-2 Level 4 for system-level ESD immunity |
Pinout & Package
Package: SMB (Case 403A), surface-mount, Pb-free, RoHS-compliant thermosetting plastic housing with cathode polarity band. Dimensions: 4.32 mm × 2.30 mm × 2.20 mm (L × W × H); 260°C reflow compatible; modified L-bend leads for enhanced pad adhesion.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; completes current path during avalanche conduction |
| Cathode | High-side transient input terminal | Connected to protected line (e.g., 24 V rail); polarity band identifies this terminal for correct PCB orientation |
Key Features
| Feature | Design Value |
|---|---|
| UL 497B Recognition (QVGQ2) | Validated for isolated loop circuit protection - enables use in telecom/data line interfaces without additional safety certification effort |
| AEC-Q101 Qualified | Qualified for automotive applications including engine control units and body electronics - supports PPAP documentation requirements |
| Low Clamping Ratio (VC/VBR) | 1.38× (33.2 V / 24 V) - tighter ratio than standard TVS devices improves margin for 28 V systems |
| SURMETIC® Package Reliability | Void-free transfer-molded construction - achieves >1000 thermal cycles without delamination or parameter shift |
| Thermal Derating Support | RJL = 25°C/W - enables accurate power derating calculations for ambient temperatures up to +150°C junction |
Applications
| Automotive Power Input Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: 24 V battery-fed ECUs exposed to ISO 7637-2 load dump pulses up to 120 V for 400 ms. IC Role / Device Role / Timing Role: Shunt clamping element placed directly at connector entry point to limit voltage seen by DC-DC converter input stage. Use Value: Clamps 18 A surge to ≤33.2 V within <1 ns, preventing damage to 40 V-rated input MOSFETs and enabling compliance with OEM pulse immunity specs. |
Use Scenario: 24 V digital input channels in programmable logic controllers subjected to field-wiring induced transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp on each channel's optocoupler input side, upstream of series current-limiting resistor. Use Value: Sub-5 µA leakage avoids false triggering of 2 mA input threshold; 600 W peak power handles multiple simultaneous surges per channel. |
| Medical Equipment Power Rails | Telecom Interface Isolation |
Use Scenario: Auxiliary 24 V power supply in diagnostic imaging equipment requiring IEC 60601-1 creepage/clearance compliance. IC Role / Device Role / Timing Role: Secondary protection after primary fuse and MOV, ensuring low-energy clamping without fire hazard risk. Use Value: UL 497B recognition validates safe operation in patient-connected equipment; 20.5 V VRWM matches 24 V nominal rail with 15% margin. |
Use Scenario: RS-485 data lines in building automation gateways with isolated power domains. IC Role / Device Role / Timing Role: Unidirectional clamp on isolated side of signal transformer, referenced to isolated ground plane. Use Value: 33.2 V clamping protects 3.3 V/5 V transceivers while maintaining signal integrity; 1000 pF capacitance at 0 V bias minimizes data rate 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 clamping voltage (38.9 V @ 10.3 A), same SMB package | Not suitable for 24 V automotive load dump where 600 W margin is required | Select P6SMB24AT3G when surge energy exceeds 400 W or clamping voltage must stay below 35 V |
| 1.5SMC24A | Higher peak power (1500 W), larger SMC package (7.11 mm × 6.22 mm), same VRWM/VBR specs | Requires PCB layout change; better for high-reliability industrial systems with space allowance | Choose P6SMB24AT3G for space-constrained designs needing 600 W in SMB footprint |
Compared with SMAJ24A and 1.5SMC24A, P6SMB24AT3G delivers optimal balance of 600 W surge handling, 33.2 V clamping, and compact SMB packaging - making it preferred for automotive body control modules and DIN-rail mounted industrial controllers where board area and thermal mass are constrained.
Availability
P6SMB24AT3G is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, medical diagnostic power supplies, and telecom interface protection requiring stable component supply across multi-year production cycles.
Supply support for P6SMB24AT3G 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 manufacturer specializing in power management, analog, sensors, and discrete devices for automotive, industrial, and cloud power applications.
P6SMB24AT3G belongs to the P6SMBxxAT3G series of unidirectional TVS diodes engineered for high-reliability transient suppression in harsh environments - particularly targeting automotive power distribution and industrial control systems demanding AEC-Q101 qualification and UL 497B safety recognition.
FAQ
What is the maximum clamping voltage of P6SMB24AT3G at its rated peak pulse current?
The P6SMB24AT3G clamps to a maximum of 33.2 V at its specified peak pulse current of 18 A (10/1000 µs waveform). This value is guaranteed across temperature and process variation per ON Semiconductor's datasheet specification table on page 3. The clamping voltage directly determines the maximum stress imposed on downstream components during surge events, making it a critical parameter for system-level immunity design using the P6SMB24AT3G.
Is P6SMB24AT3G suitable for automotive applications requiring AEC-Q101 qualification?
Yes, P6SMB24AT3G is explicitly AEC-Q101 qualified and PPAP capable, as confirmed in the "Specification Features" section of the datasheet. It is manufactured in ON Semiconductor's automotive-grade production lines and supports full documentation packages for Tier 1 automotive suppliers. This qualification ensures P6SMB24AT3G meets rigorous stress testing for temperature cycling, humidity, mechanical shock, and long-term reliability - essential for deployment in engine control, body electronics, and ADAS subsystems.
What is the working peak reverse voltage (VRWM) of P6SMB24AT3G, and why does it matter?
The P6SMB24AT3G has a working peak reverse voltage (VRWM) of 20.5 V, meaning it remains non-conductive up to this DC or continuous peak voltage level. This parameter is critical because VRWM must exceed the maximum steady-state operating voltage of the protected circuit - typically by ≥10% - to prevent leakage-induced power loss or false triggering. For a nominal 24 V system, P6SMB24AT3G provides appropriate margin while enabling effective clamping during transients.
Does P6SMB24AT3G have UL 497B recognition, and what does that enable?
Yes, P6SMB24AT3G carries UL 497B recognition under file #E210057 for protector classification (QVGQ2). This certification validates its suitability for isolated loop circuit protection in telecommunications, industrial networks, and medical equipment - eliminating the need for additional third-party safety testing. UL 497B covers dielectric withstand, endurance conditioning, and strike voltage breakdown, confirming P6SMB24AT3G's reliability in safety-critical isolation barriers.
What package type and mounting specifications apply to P6SMB24AT3G?
P6SMB24AT3G uses the SMB package (Case 403A), a surface-mount thermosetting plastic housing with modified L-bend leads. It supports 260°C reflow for 10 seconds, has a thermal resistance of 25°C/W (junction-to-lead), and requires ON Semiconductor's recommended footprint for optimal thermal performance. The cathode is marked by a polarity band, and the device may be mounted in any orientation - critical for automated assembly and thermal management in dense PCB layouts using P6SMB24AT3G.
P6SMB24AT3G 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):
- 20.5V
- Voltage - Breakdown (Min):
- 22.8V
- Voltage - Clamping (Max) @ Ipp:
- 33.2V
- Current - Peak Pulse (10/1000µs):
- 18A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 775pF @ 1MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
P6SMB24AT3G FAQ
1.How can I place an order for P6SMB24AT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB24AT3G 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 P6SMB24AT3G reliable?
The price and inventory of P6SMB24AT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB24AT3G is usually 5 days.
3.What payment methods are accepted for P6SMB24AT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB24AT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB24AT3G?
P6SMB24AT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB24AT3G 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 P6SMB24AT3G?
For technical support, including P6SMB24AT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB24AT3G requirements.
6.How does Aetrix verify that P6SMB24AT3G is sourced from the original manufacturer or authorized distributors?
All P6SMB24AT3G 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 P6SMB24AT3G meets industry standards.
7.What is the process for return or replacement of P6SMB24AT3G?
All P6SMB24AT3G units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB24AT3G, 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 P6SMB24AT3G part is unused and in its original packaging.
Return procedure for P6SMB24AT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB24AT3G Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
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Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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