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onsemi P6SMB30AT3
- Part No.:
- P6SMB30AT3
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- -
- Datasheet:
-
P6SMB30AT3.pdf
- Description:
- TVS ZENER UNIDIR 600W 30V SMB
- Quantity:
- Payment:
- Shipping:
Inventory:3,540
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Product details
Overview
P6SMB30AT3 from ON Semiconductor is a unidirectional 600 W peak power TVS diode designed to protect voltage-sensitive circuits from high-energy transients. It features a 25.6 V working peak reverse voltage (VRWM), 30 V breakdown voltage (VBR) at 1 mA test current, 41.4 V maximum clamping voltage (VC) at 14.4 A peak pulse current (IPP), and <1 ns response time. It is used in automotive power supply rail protection and industrial control I/O interfaces.
For engineers reviewing the P6SMB30AT3 datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage margin relative to system operating voltage, peak pulse current handling under ISO 7637-2 pulse 5a/b, UL 497B certification for loop protection, and SMB package thermal performance in high-density PCB layouts.
Technical Context
The P6SMB30AT3 operates as a Zener-based transient voltage suppressor with avalanche breakdown behavior. Its unidirectional configuration provides reverse-biased clamping only, requiring correct polarity placement across protected lines. The device achieves low dynamic impedance during surge events due to optimized silicon junction design and exhibits <5 µA leakage at VRWM.
Thermal management relies on junction-to-lead resistance of 25 °C/W and 0.55 W DC power dissipation at 25 °C ambient. It complies with AEC-Q101 for automotive use and supports soldering at 260 °C for 10 seconds per JEDEC J-STD-020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600 W @ 1 ms - withstands high-energy surges such as ISO 7637-2 Pulse 5 without failure |
| Working Peak Reverse Voltage | 25.6 V - sets minimum operating voltage threshold before clamping activates |
| Breakdown Voltage | 30 V @ 1 mA - defines nominal Zener conduction onset under controlled DC test conditions |
| Clamping Voltage | 41.4 V @ 14.4 A IPP - maximum voltage seen by protected circuit during worst-case transient |
| Response Time | <1 ns - ensures suppression begins before most fast-rising ESD or lightning-induced edges propagate |
| Leakage Current | <5 µA @ 25.6 V - negligible standby power loss and signal integrity impact in always-on systems |
| ESD Rating | Class 3 HBM (>16 kV) - meets IEC 61000-4-2 Level 4 for system-level ESD immunity |
Pinout & Package
Package: SMB (Case 403A), surface-mount, void-free thermosetting plastic with cathode band marking. Dimensions: 4.32 mm × 3.56 mm × 2.30 mm (L × W × H). Lead finish is readily solderable; mounting position is unrestricted.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry during forward conduction | Connected to lower-potential side (e.g., ground or return path) in unidirectional clamp configuration |
| Cathode | Current exit during reverse-biased clamping | Connected to protected line (e.g., 24 V rail); polarity band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| UL 497B Recognition | Qualified for isolated loop circuit protection - enables use in telecom and industrial fieldbus interfaces without additional certification effort |
| AEC-Q101 Qualification | Validated for automotive underhood environments - supports deployment in engine control modules and body electronics |
| SURMETIC® Package | ON Semiconductor's proprietary molded plastic - delivers superior moisture resistance and mechanical reliability vs. standard SMB |
| Low Clamping Ratio | VC/VBR = 41.4/30 = 1.38 - tight voltage margin preserves headroom for downstream ICs with 45 V absolute max ratings |
| Pb-Free & RoHS Compliant | Meets global environmental regulations - eliminates lead contamination risk in automated assembly and end-of-life recycling |
Applications
| Automotive Power Rail Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: Suppresses load dump transients (ISO 7637-2 Pulse 5a, up to 120 V/100 ms) on 24 V vehicle battery-fed ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 24 V rail and chassis ground to clamp overvoltage before it reaches MCU power pins. Use Value: Limits rail voltage to ≤41.4 V during 14.4 A surge, preventing damage to 36 V-rated LDOs and CAN transceivers. | Use Scenario: Protects 24 V digital input channels in programmable logic controllers from field-wiring induced surges and ESD. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor at terminal block entry point, shunting energy away from optocoupler input stages. Use Value: Withstands repetitive 1 kV/500 A surge pulses per IEC 61000-4-5 while maintaining <5 µA leakage to preserve input threshold accuracy. |
| Medical Equipment Power Supply Input | Telecom Line Interface Protection |
Use Scenario: Guards primary-side DC input of medical-grade AC/DC converters against mains-borne transients and capacitor discharge events. IC Role / Device Role / Timing Role: First-line defense on 28 V DC input bus upstream of filtering and regulation stages. Use Value: UL 497B recognition validates compliance for patient-connected equipment; clamps 600 W surges without degradation over 10,000 cycles. | Use Scenario: Shields RS-485 transceiver data lines in building automation gateways from induced lightning surges on long cable runs. IC Role / Device Role / Timing Role: Bidirectional protection not required here - unidirectional P6SMB30AT3 protects common-mode surges referenced to local ground. Use Value: 41.4 V clamping ensures transceiver remains within its ±12 V common-mode range even during 10/1000 µs transients up to 14.4 A. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30A | Same SMB package, 30 V VBR, but 400 W peak power and higher VC (48.4 V) | Lacks UL 497B and AEC-Q101 qualification; lower surge rating limits use in automotive load dump | Select when cost sensitivity outweighs need for 600 W rating or regulatory certifications |
| 1.5SMC33A | Higher VRWM (28.2 V), same 600 W rating, but larger SMC package (7.11 mm × 6.22 mm) | Requires PCB layout change; better thermal mass but incompatible with space-constrained SMB footprints | Choose for enhanced thermal performance where board area permits SMC footprint |
Compared with SMAJ30A and 1.5SMC33A, P6SMB30AT3 uniquely balances 600 W surge capability, UL 497B/ AEC-Q101 compliance, and SMB footprint - making it optimal for automotive and industrial designs needing certified, space-efficient protection.
Availability
P6SMB30AT3 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, and medical power supply inputs requiring stable component supply and full regulatory traceability.
Supply support for P6SMB30AT3 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 P6SMB30AT3 belongs to the P6SMBxxAT3G series of unidirectional TVS diodes engineered specifically for robust, standards-compliant transient suppression in harsh electrical environments.
FAQ
What is the clamping voltage of P6SMB30AT3 at its rated peak pulse current?
The P6SMB30AT3 has a maximum clamping voltage (VC) of 41.4 V at its rated peak pulse current (IPP) of 14.4 A, measured using a 10/1000 µs waveform. This value defines the highest voltage the protected circuit will experience during a worst-case transient event, ensuring compatibility with downstream components rated for ≤45 V absolute maximum voltage. The P6SMB30AT3 maintains this clamping performance across its qualified temperature range of −65 °C to +150 °C.
Is P6SMB30AT3 suitable for automotive applications?
Yes, P6SMB30AT3 is AEC-Q101 qualified and PPAP capable, making it suitable for automotive applications including engine control units, body electronics, and infotainment power rails. Its 600 W peak power rating handles ISO 7637-2 load dump pulses, and its SURMETIC® package ensures reliability under thermal cycling and vibration. The P6SMB30AT3 also meets UL 497B for loop protection - a requirement in many vehicle subsystems interfacing with external sensors or actuators.
How does the P6SMB30AT3 differ from bidirectional TVS diodes?
The P6SMB30AT3 is unidirectional and functions only as a reverse-biased Zener clamp; it conducts during positive transients on the cathode side but blocks forward current like a rectifier. Bidirectional variants (e.g., P6SMB30CAT3) provide symmetrical clamping for AC-coupled or floating lines. The P6SMB30AT3 is selected when protecting DC rails with defined polarity - offering tighter VBR tolerance and lower leakage than bidirectional equivalents at the same voltage rating.
What is the thermal resistance of P6SMB30AT3, and how does it affect PCB layout?
The P6SMB30AT3 has a junction-to-lead thermal resistance (RJL) of 25 °C/W and junction-to-ambient (RJA) of 226 °C/W on a standard FR-4 board. To maintain reliability during repeated surges, PCB layout must maximize copper area connected to both terminals - especially the cathode pad - per ON Semiconductor's recommended footprint for Case 403A. Insufficient copper causes localized heating that degrades clamping consistency and shortens lifetime. The P6SMB30AT3's low RJL enables effective heat transfer through leads into internal copper planes.
Does P6SMB30AT3 require derating at elevated ambient temperatures?
Yes, P6SMB30AT3 requires derating: its DC power dissipation drops from 0.55 W at 25 °C ambient to zero at 150 °C, with a linear derating slope of 4.4 mW/°C above 25 °C. For peak pulse operation, Figure 3 in the datasheet shows 60% derating at 100 °C ambient. These curves apply to both single-event and repetitive surge conditions. Designers must verify thermal margins using actual board layout and airflow - the P6SMB30AT3's performance is directly tied to its ability to dissipate heat via PCB copper and surrounding components.
P6SMB30AT3 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:
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- Grade:
- -
- Qualification:
- -
- Mounting Type:
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- Supplier Device Package:
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P6SMB30AT3 FAQ
1.How can I place an order for P6SMB30AT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB30AT3 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 P6SMB30AT3 reliable?
The price and inventory of P6SMB30AT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB30AT3 is usually 5 days.
3.What payment methods are accepted for P6SMB30AT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB30AT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB30AT3?
P6SMB30AT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB30AT3 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 P6SMB30AT3?
For technical support, including P6SMB30AT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB30AT3 requirements.
6.How does Aetrix verify that P6SMB30AT3 is sourced from the original manufacturer or authorized distributors?
All P6SMB30AT3 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 P6SMB30AT3 meets industry standards.
7.What is the process for return or replacement of P6SMB30AT3?
All P6SMB30AT3 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB30AT3, 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 P6SMB30AT3 part is unused and in its original packaging.
Return procedure for P6SMB30AT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB30AT3 Tags
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