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Vishay General Semiconductor - Diodes Division P6SMB47A-M3/5B
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- Part No.:
- P6SMB47A-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB47A-M3/5B.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,221
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Product details
Overview
P6SMB47A-M3/5B from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 47 V breakdown voltage (VBR min/max = 44.7–49.4 V at IT = 1.0 mA), 40.2 V stand-off voltage (VWM), 64.8 V maximum clamping voltage (VC) at 9.3 A peak pulse current (IPPM), and 600 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the P6SMB47A-M3/5B datasheet, P6SMB47A-M3/5B pinout, P6SMB47A-M3/5B application, or P6SMB47A-M3/5B equivalent, key selection criteria include unidirectional polarity, halogen-free RoHS-compliant construction (M3 suffix), AEC-Q101 qualification readiness (via _B revision), thermal resistance (RθJA = 100 °C/W), and compatibility with automated SMT placement on standard 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a unidirectional clamping device: reverse-biased during normal operation with <1.0 μA leakage at 40.2 V, then rapidly avalanches when transient voltage exceeds VBR to limit downstream voltage to ≤64.8 V. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance under repetitive 10/1000 μs pulses at 0.01% duty cycle.
The SMB (DO-214AA) package provides mechanical robustness with UL 94 V-0 molding compound, matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and meets JESD 201 Class 2 whisker resistance. Polarity is marked by a cathode band; no marking applies to bidirectional variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 44.7–49.4 V at 1.0 mA test current - defines precise avalanche initiation threshold for reliable overvoltage triggering |
| Stand-off Voltage VWM | 40.2 V - maximum continuous reverse operating voltage before significant leakage begins |
| Clamping Voltage VC | 64.8 V at 9.3 A IPPM - limits protected circuit voltage during worst-case 600 W transient event |
| Peak Pulse Power PPPM | 600 W with 10/1000 μs waveform - sustains high-energy surges without failure under defined test conditions |
| Junction Temperature Range | −65 °C to +150 °C - supports operation in harsh environments including automotive under-hood and industrial control cabinets |
| Thermal Resistance RθJA | 100 °C/W - determines temperature rise above ambient at 5.0 W steady-state dissipation on standard PCB layout |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, single-ended unidirectional configuration with cathode band marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); recommended pad layout: 5.59 mm × 5.59 mm copper area per terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference node | Connected to lower-potential side of protected line; establishes reference for clamping action |
| Cathode | Avalanche conduction path / Clamping output node | Marked with band; connected to higher-potential side (e.g., VIN or signal line) to shunt transients to ground |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power handling | Enables protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) without derating on standard PCBs |
| Glass passivated junction | Ensures long-term stability of VBR and low parameter drift across temperature and lifetime |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets environmental compliance requirements for industrial and consumer end equipment without compromising performance |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and reflow at 260 °C peak without baking, simplifying SMT manufacturing |
| AEC-Q101 qualification option (_B revision) | Supports drop-in use in automotive subsystems requiring stress-tested reliability (e.g., body control modules) |
Applications
| Industrial Power Supply Protection | Automotive Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 48 V DC input rails in programmable logic controllers (PLCs) against load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground to clamp transients before they reach DC-DC converters and microcontrollers. Use Value: Limits voltage excursion to ≤64.8 V during 600 W surges, preventing latch-up or gate oxide damage in downstream SiC MOSFET drivers and isolated ADCs. |
Use Scenario: Safeguarding LIN bus and analog sensor inputs (e.g., pressure, temperature) in engine control units exposed to ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Standoff-clamp TVS on sensor signal lines, leveraging 40.2 V VWM to avoid interference with 12 V nominal operation while responding in <1 ns. Use Value: Maintains signal integrity during 100 V/50 ms load dump events by clamping within 100 ps, preserving measurement accuracy of 12-bit sensor front-ends. |
| Telecom Line Card Surge Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Shielding Ethernet PHY power pins and RS-485 transceiver VCC rails in base station remote radio units from lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS on 3.3 V and 5 V supply domains, coordinated with secondary GDTs for staged protection architecture. Use Value: Absorbs up to 600 W energy without degradation, enabling compliance with GR-1089-CORE Zone 3 surge immunity requirements. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in smart home appliances (e.g., robotic vacuum cleaners). IC Role / Device Role / Timing Role: Unidirectional clamping device across motor terminals and H-bridge supply rails to prevent back-EMF damage to gate drivers. Use Value: Withstands 100 A non-repetitive forward surge (IFSM) and maintains <1.0 μA leakage at 40.2 V, ensuring low standby power loss and long service life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ47A-E3/5B | Same VBR range (44.7–49.4 V), but 400 W PPPM rating and SMA package (higher RθJA = 140 °C/W) | Limited to lower-energy transients; less suitable for IEC 61000-4-5 Level 4 or automotive load dump | Select when board space is constrained and surge energy is ≤400 W; verify thermal margin with reduced copper area |
| 1.5SMC47A | Same electrical specs but in larger SMC (DO-214AB) package; RθJA = 60 °C/W, higher IPPM (10.2 A) | Better thermal performance and higher surge current capacity; requires larger PCB footprint | Choose for high-reliability industrial systems where thermal headroom and 1000 W+ surge margin are critical |
Compared with P6SMB47A-M3/5B, SMAJ47A-E3/5B offers smaller size but sacrifices 33% peak power handling and thermal robustness, while 1.5SMC47A delivers superior thermal management and surge margin at the cost of 40% larger footprint - making P6SMB47A-M3/5B the optimal balance of power density, manufacturability, and AEC-Q101 readiness.
Availability
P6SMB47A-M3/5B is available at Aetrix Electronics and suitable for industrial power supplies, automotive sensor interfaces, telecom line cards, and consumer appliance motor drives requiring stable component supply with halogen-free compliance and MSL Level 1 handling.
Supply support for P6SMB47A-M3/5B 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The P6SMB Series targets cost-sensitive, high-volume transient protection needs across automotive, industrial, and communications markets - engineered for automated assembly, thermal resilience, and consistent clamping performance under repetitive surge stress.
FAQ
What is the maximum clamping voltage of the P6SMB47A-M3/5B under a 10/1000 μs surge?
The P6SMB47A-M3/5B has a maximum clamping voltage (VC) of 64.8 V at 9.3 A peak pulse current (IPPM) when subjected to a 10/1000 μs waveform. This value is measured under standardized test conditions with the device mounted on 0.2" × 0.2" copper pads and represents the upper voltage limit imposed on protected circuitry during a 600 W transient event. The P6SMB47A-M3/5B maintains this clamping performance consistently across its specified operating temperature range.
Is the P6SMB47A-M3/5B suitable for automotive applications?
Yes - the P6SMB47A-M3/5B is offered in an AEC-Q101 qualified version denoted by the _B suffix (e.g., P6SMB47A-M3/5B_B), which undergoes stress testing for automotive-grade reliability. While the base P6SMB47A-M3/5B is commercial-grade, its halogen-free (M3) construction, MSL Level 1 rating, and 150 °C junction temperature capability make it suitable for non-safety-critical automotive subsystems such as body electronics and infotainment power rails. Always verify qualification status via the full ordering code before deployment.
How does the P6SMB47A-M3/5B differ from bidirectional TVS diodes like P6SMB47CA?
The P6SMB47A-M3/5B is unidirectional and functions only in reverse bias, with a cathode band marking and forward voltage drop (~3.5 V at 50 A). In contrast, P6SMB47CA is bidirectional and symmetrical, offering identical clamping in both polarities - ideal for AC lines or differential data buses. The P6SMB47A-M3/5B provides tighter leakage control (<1.0 μA at 40.2 V) and higher surge current capability in DC applications, whereas P6SMB47CA avoids polarity concerns but exhibits higher leakage in each direction.
What is the thermal resistance of the P6SMB47A-M3/5B, and how does it affect PCB layout?
The P6SMB47A-M3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on minimum recommended 0.2" × 0.2" copper pads per terminal. This means a 5.0 W steady-state dissipation raises junction temperature by ~500 °C above ambient - underscoring that RθJA applies only to pulsed operation. For reliable long-term use, ensure adequate copper pour and avoid routing heat-sensitive components nearby. The P6SMB47A-M3/5B's low RθJL (20 °C/W) further supports thermal transfer through leads into the PCB.
Can the P6SMB47A-M3/5B replace older P6KE47A through direct substitution?
No - the P6SMB47A-M3/5B is not a direct replacement for through-hole P6KE47A due to fundamental package and thermal differences: P6KE47A uses DO-15 axial package with RθJA ≈ 50 °C/W and higher IPPM (10.4 A), while P6SMB47A-M3/5B uses SMB (DO-214AA) with RθJA = 100 °C/W and IPPM = 9.3 A. Though VBR, VWM, and VC match closely, PCB layout, thermal design, and surge margin must be revalidated. The P6SMB47A-M3/5B is optimized for SMT automation, not legacy through-hole systems.
P6SMB47A-M3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- P6SMB, TransZorb®
- Packaging:
- Tape & Box (TB)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
P6SMB47A-M3/5B FAQ
1.How can I place an order for P6SMB47A-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB47A-M3/5B 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 P6SMB47A-M3/5B reliable?
The price and inventory of P6SMB47A-M3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB47A-M3/5B is usually 5 days.
3.What payment methods are accepted for P6SMB47A-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB47A-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB47A-M3/5B?
P6SMB47A-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB47A-M3/5B 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 P6SMB47A-M3/5B?
For technical support, including P6SMB47A-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB47A-M3/5B requirements.
6.How does Aetrix verify that P6SMB47A-M3/5B is sourced from the original manufacturer or authorized distributors?
All P6SMB47A-M3/5B 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 P6SMB47A-M3/5B meets industry standards.
7.What is the process for return or replacement of P6SMB47A-M3/5B?
All P6SMB47A-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB47A-M3/5B, 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 P6SMB47A-M3/5B part is unused and in its original packaging.
Return procedure for P6SMB47A-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB47A-M3/5B Tags
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