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onsemi P6SMB47CAT3
- Part No.:
- P6SMB47CAT3
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB47CAT3.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:8,572
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Product details
Overview
P6SMB47CAT3 from ON Semiconductor is a bidirectional 600 W transient voltage suppressor (TVS) diode designed for parallel overvoltage protection of sensitive electronics. It features a 40.2 V working peak reverse voltage (VRWM), 47 V nominal Zener breakdown voltage (VBR) at 1 mA test current, and clamps transients to ≤64.8 V at 9.3 A peak pulse current - used in power supply input stages, industrial I/O interfaces, and automotive body control modules.
For engineers reviewing the P6SMB47CAT3 datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage margin vs. system rail, surge current capability under 10/1000 µs waveform, UL 497B recognition for isolated loop protection, and SMB (DO-214AA) package compatibility with high-density PCB layouts.
Technical Context
The P6SMB47CAT3 operates as a bidirectional avalanche diode, symmetrically clamping positive and negative transients above ±47 V breakdown. Its low zener impedance and <1 ns response time enable fast suppression of ESD (Class 3, >16 kV HBM) and lightning-induced surges without signal distortion.
Thermal design relies on junction-to-lead resistance of 40 °C/W and 600 W peak power rating at 1 ms pulse width (10/1000 µs waveform). Derating begins above 75°C lead temperature, with 0.55 W DC dissipation limit at 25°C ambient and 4.4 mW/°C linear derating above that point.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600 W @ 1 ms, 10/1000 µs waveform - supports IEC 61000-4-5 Level 4 surge immunity testing |
| Working Peak Reverse Voltage | 40.2 V - sets minimum operating voltage margin before clamping activates |
| Zener Breakdown Voltage | 47.05 V (nominal) @ 1 mA - defines precise conduction threshold for bidirectional protection |
| Clamping Voltage | 64.8 V @ 9.3 A IPP - determines maximum voltage seen by protected circuit during surge |
| Junction Capacitance | 220 pF @ 0 V, 1 MHz - impacts high-frequency signal integrity in data line protection |
| Leakage Current | <5 µA @ 40.2 V - ensures negligible standby power loss in always-on systems |
| UL Recognition | UL 497B certified (File #E210057) - validated for isolated loop circuit protection in telecom and industrial equipment |
Pinout & Package
Package: SMB (DO-214AA), surface-mount plastic case per Case Outline 403A. Dimensions: 4.06–4.60 mm length × 3.30–3.95 mm width × 1.90–2.45 mm height. Lead finish is Pb-free, solderable at 260°C for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (marked band) | Anode/Cathode terminal (bidirectional) | No polarity marking required; symmetrical structure enables AC/DC line protection without orientation constraints |
| Anode (unmarked end) | Anode/Cathode terminal (bidirectional) | Identical electrical behavior in both directions - eliminates layout errors in differential or floating bus applications |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC lines, RS-485 buses, and ungrounded sensor interfaces without external diode pairing |
| UL 497B certification | Validated for isolated loop protection - meets safety requirements for telecom interface circuits and medical isolation barriers |
| ESD robustness | Class 3 HBM (>16 kV) rating - withstands repeated human-body discharges without parameter shift or failure |
| Low clamping ratio | VC/VBR = 64.8 V / 47.05 V ≈ 1.38 - tighter voltage control than unidirectional TVS devices in same power class |
| SMB package thermal performance | 40 °C/W junction-to-lead resistance - supports sustained surge handling in compact industrial PCBs with limited copper area |
Applications
| Industrial Power Input Protection | Automotive Body Control Module |
|---|---|
Use Scenario: 24 V DC power feed to PLC I/O card exposed to load dump and inductive switching transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed directly across input terminals before bulk capacitance and DC-DC converter. Use Value: Limits transient excursions to ≤64.8 V, preventing damage to 36 V-rated input stage components while maintaining UL 497B compliance. |
Use Scenario: LIN bus transceiver power rail in door module subjected to battery disconnect spikes and alternator load dump. IC Role / Device Role / Timing Role: Bidirectional shunt protector between VBAT and GND, absorbing energy within 1 ns to prevent transceiver latch-up. Use Value: Clamps 100 V/100 ms load dump events to safe levels without degrading LIN signal integrity due to 220 pF capacitance. |
| Medical Isolated Sensor Interface | Telecom Line Card Surge Protection |
Use Scenario: Isolated analog front-end for patient monitoring ECG inputs requiring reinforced insulation and transient immunity. IC Role / Device Role / Timing Role: Secondary protection device on secondary-side power rail downstream of isolated DC-DC converter. Use Value: UL 497B recognition validates suitability for protected circuits in Class II medical equipment, ensuring regulatory acceptance. |
Use Scenario: T1/E1 line interface card in central office equipment exposed to lightning-induced surges on twisted-pair trunks. IC Role / Device Role / Timing Role: First-stage shunt suppressor on tip/ring lines, coordinated with gas discharge tube (GDT) upstream. Use Value: 600 W peak power rating handles 10/1000 µs surges up to 9.3 A, enabling coordination with slower GDTs for multi-stage protection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ47CA | Same SMB package but lower 400 W peak power rating and higher 67.2 V clamping voltage at 9.3 A | Limited to lower-energy surge environments (IEC 61000-4-5 Level 3); not UL 497B recognized | Select when cost sensitivity outweighs need for UL certification and highest surge margin |
| 1.5KE47CA | Higher 1500 W peak power but axial DO-201 package - incompatible with SMT assembly and higher parasitic inductance | Suitable only for through-hole prototyping or legacy board rework; unsuitable for high-speed or space-constrained designs | Choose only if existing through-hole footprint must be retained and 1.5 kW surge headroom is mandatory |
Compared with SMAJ47CA and 1.5KE47CA, the P6SMB47CAT3 delivers optimal balance of UL-certified reliability, SMT manufacturability, and 600 W surge capacity - making it preferred for new industrial and automotive designs requiring production-ready, standards-compliant protection.
Availability
P6SMB47CAT3 is available at Aetrix Electronics and suitable for industrial power input protection, automotive body control modules, medical isolated sensor interfaces, and telecom line card surge protection requiring stable component supply and full traceability.
Supply support for P6SMB47CAT3 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 power management, analog, sensors, and discrete devices for automotive, industrial, and cloud power applications.
The P6SMB47CAT3 belongs to the P6SMBxxCAT3 series of bidirectional TVS diodes engineered specifically for high-reliability transient suppression in harsh environments - emphasizing UL 497B compliance, low clamping ratio, and robust surge endurance.
FAQ
What is the clamping voltage of the P6SMB47CAT3 at its rated peak pulse current?
The P6SMB47CAT3 clamps to a maximum of 64.8 V at its rated peak pulse current of 9.3 A, measured under the standard 10/1000 µs waveform. This value is critical for verifying that protected circuitry remains below absolute maximum voltage ratings during surge events. The P6SMB47CAT3 achieves this with minimal overshoot due to its sub-1 ns response time and low internal inductance.
Is the P6SMB47CAT3 suitable for bidirectional AC line protection?
Yes, the P6SMB47CAT3 is explicitly designed as a bidirectional TVS diode, with symmetrical breakdown characteristics in both polarities. Its 47 V nominal Zener voltage and 40.2 V VRWM make it appropriate for protecting 36 V AC or DC systems where transients may occur in either direction - such as RS-485 data lines or dual-rail power supplies. The P6SMB47CAT3 requires no polarity orientation during placement.
Does the P6SMB47CAT3 have UL recognition for safety-critical applications?
Yes, the P6SMB47CAT3 carries UL 497B recognition (File #E210057) for isolated loop circuit protection. This certification covers rigorous testing including strike voltage breakdown, endurance conditioning, dielectric withstand, and discharge performance - validating its use in telecom interfaces, medical isolation barriers, and other safety-relevant systems where third-party safety approval is mandatory. The P6SMB47CAT3 is not rated for life-support applications.
What is the thermal resistance and power derating behavior of the P6SMB47CAT3?
The P6SMB47CAT3 has a junction-to-lead thermal resistance of 40 °C/W and a DC power dissipation limit of 0.55 W at 25°C ambient, derating linearly by 4.4 mW/°C above that temperature. At 75°C lead temperature, its DC rating drops to 3.0 W, with further derating required beyond that point. These values are measured using ON Semiconductor's recommended FR-4 footprint per Case 403A dimensions - critical for accurate thermal modeling in real-world layouts.
How does the P6SMB47CAT3 compare to unidirectional TVS diodes in surge protection design?
The P6SMB47CAT3 provides symmetrical clamping for both positive and negative transients, eliminating the need for dual-diode configurations in AC or floating-bus applications. Unlike unidirectional devices such as P6SMB47AT3, the P6SMB47CAT3 does not require a series blocking diode for DC circuits - simplifying layout and reducing component count. Its 220 pF junction capacitance is typical for the SMB family and must be accounted for in high-speed signal paths.
P6SMB47CAT3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-214AA, SMB
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 40.2V
- Voltage - Breakdown (Min):
- 44.7V
- Voltage - Clamping (Max) @ Ipp:
- 64.8V
- Current - Peak Pulse (10/1000µs):
- 9.3A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 220pF @ 1MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
P6SMB47CAT3 FAQ
1.How can I place an order for P6SMB47CAT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB47CAT3 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 P6SMB47CAT3 reliable?
The price and inventory of P6SMB47CAT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB47CAT3 is usually 5 days.
3.What payment methods are accepted for P6SMB47CAT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB47CAT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB47CAT3?
P6SMB47CAT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB47CAT3 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 P6SMB47CAT3?
For technical support, including P6SMB47CAT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB47CAT3 requirements.
6.How does Aetrix verify that P6SMB47CAT3 is sourced from the original manufacturer or authorized distributors?
All P6SMB47CAT3 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 P6SMB47CAT3 meets industry standards.
7.What is the process for return or replacement of P6SMB47CAT3?
All P6SMB47CAT3 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB47CAT3, 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 P6SMB47CAT3 part is unused and in its original packaging.
Return procedure for P6SMB47CAT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB47CAT3 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
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Diodes Incorporated
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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