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Vishay General Semiconductor - Diodes Division P6SMB43A-M3/5B
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- Part No.:
- P6SMB43A-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB43A-M3/5B.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,559
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Product details
Overview
P6SMB43A-M3/5B from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 43 V breakdown voltage (VBR = 40.9–45.2 V at IT = 1.0 mA), 36.8 V stand-off voltage (VWM), clamps transients to ≤59.3 V at 10.1 A peak pulse current (IPPM), and delivers 600 W peak pulse power with a 10/1000 µs waveform - deployed in automotive sensor interfaces, industrial I/O modules, and DC power rail protection.
For engineers reviewing the P6SMB43A-M3/5B datasheet, P6SMB43A-M3/5B pinout, P6SMB43A-M3/5B application, or P6SMB43A-M3/5B equivalent, this page provides verified electrical parameters, SMB (DO-214AA) package details, clamping performance under surge conditions, thermal derating curves, and validated alternative parts for design-in flexibility and supply continuity.
Technical Context
The P6SMB43A-M3/5B operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology for stable reverse-biased transient suppression. Its 100 °C/W junction-to-ambient thermal resistance (RθJA) and 20 °C/W junction-to-lead (RθJL) support reliable operation up to TJ = 150 °C when mounted on 5.0 mm × 5.0 mm copper pads per terminal.
It meets J-STD-020 MSL Level 1 (peak reflow ≤260 °C), supports 100 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), and exhibits low incremental surge resistance for fast response to ESD and lightning-induced transients - critical for protecting downstream MOSFETs and microcontrollers in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 40.9 V / 45.2 V at 1.0 mA test current - defines precise avalanche onset range for predictable clamping threshold |
| VWM | 36.8 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | ≤59.3 V at 10.1 A (10/1000 µs) - ensures protected circuitry sees no more than 59.3 V during worst-case surge |
| PPPM | 600 W - peak transient energy absorption capability under standardized 10/1000 µs waveform |
| IFSM | 100 A - withstands single 8.3 ms half-sine surge without degradation, enabling use in inductive load switching |
| TJ max. | +150 °C - enables operation in under-hood automotive and high-temperature industrial enclosures |
| Package | SMB (DO-214AA) - industry-standard surface-mount outline with 0.220" × 0.130" footprint and matte tin-plated leads |
Pinout & Package
SMB (DO-214AA) package: low-profile, rectangular body with cathode band marking; terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102; meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path (unidirectional) | Connected to system ground or low-side return; conducts during forward surge events |
| Cathode | Protected line connection (unidirectional) | Connected to line being protected (e.g., 48 V rail); blocks normal operation, avalanches during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables protection against IEC 61000-4-5 Level 4 surges (4 kV line-to-earth) without external series impedance |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes voltage overshoot across protected ICs, reducing risk of latch-up or gate oxide damage |
| MSL Level 1 moisture sensitivity | Allows direct placement into standard SMT reflow profiles without baking or dry-pack handling |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets IPC-1752A material declaration requirements for green electronics manufacturing |
| AEC-Q101 qualified option (_B suffix) | Validated for automotive applications including engine control units and ADAS sensor interfaces |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and chassis ground, clamping transients before they reach the transceiver's input pins. Use Value: Maintains signal integrity during 12 V/24 V system load dump events (up to 35 V, 400 ms) while limiting voltage seen by the transceiver to ≤59.3 V. |
Use Scenario: Safeguarding digital input channels on programmable logic controllers exposed to field wiring transients from relay coils and motor drives. IC Role / Device Role / Timing Role: Standoff-rated TVS on each 24 V DC input channel, absorbing repetitive inductive kickback without degradation. Use Value: Withstands ≥1000 surges at rated IPPM (duty cycle ≤0.01 %), extending maintenance intervals and reducing false-trip failures in factory automation. |
| DC Power Rail Protection | Consumer Power Adapter Output Stage |
|
Use Scenario: Secondary-side overvoltage suppression on 48 V PoE++ or telecom rectifier outputs subject to hot-swap and cable discharge events. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to common ground, placed immediately after DC-DC converter output filter. Use Value: Limits transient excursions to ≤59.3 V within <1 ns response time, preventing damage to downstream PMICs and FPGAs rated for 45 V absolute maximum. |
Use Scenario: Output-stage surge protection in USB-C PD adapters and wall chargers where secondary-side regulation must survive accidental short-circuit recovery spikes. IC Role / Device Role / Timing Role: Fast-acting TVS across +VOUT and GND, activated only during fault conditions to avoid loading regulation loop. Use Value: Low leakage (<1.0 µA at 36.8 V) ensures no impact on no-load efficiency; halogen-free M3 construction complies with EU EcoDesign Directive. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43A-T | Same SMB package, identical VBR (40.9–45.2 V), but rated for 600 W with 10/1000 µs waveform and 100 °C/W RθJA; not AEC-Q101 qualified | Lacks automotive qualification; suitable for commercial/industrial use only | Select when AEC-Q101 compliance is not required and cost optimization is prioritized |
| 1.5SMC43A | Higher-power SMC package (same VBR, 1500 W PPPM), larger footprint (0.285" × 0.235"), RθJA = 60 °C/W | Better thermal performance but requires PCB layout change; used where higher surge repetition is expected | Choose when system-level testing demands >600 W single-pulse capability or sustained surge duty cycles |
Compared with SMBJ43A-T and 1.5SMC43A, the P6SMB43A-M3/5B offers halogen-free construction, MSL Level 1 compatibility, and optional AEC-Q101 qualification - making it optimal for space-constrained, automotive-grade, or environmentally regulated designs where SMB footprint and RoHS/halogen compliance are mandatory.
Availability
P6SMB43A-M3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and DC power rail protection requiring stable component supply, halogen-free compliance, and long-term lifecycle support.
Supply support for P6SMB43A-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, power efficiency, and ruggedized packaging.
The P6SMB Series belongs to Vishay's TRANSZORB® TVS portfolio, engineered specifically for high-energy transient suppression in automotive, industrial, and telecom infrastructure - balancing compact SMB form factor with 600 W surge capability and AEC-Q101 qualification paths.
FAQ
What is the maximum clamping voltage of the P6SMB43A-M3/5B under a 10/1000 µs surge?
The P6SMB43A-M3/5B clamps to a maximum of 59.3 V when subjected to its rated 10.1 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is guaranteed across temperature and production lot, ensuring consistent protection margin for downstream 48 V-rated ICs. The P6SMB43A-M3/5B achieves this with low incremental surge resistance and fast avalanche response.
Does the P6SMB43A-M3/5B meet automotive qualification standards?
The base P6SMB43A-M3/5B is commercial-grade and halogen-free/RoHS-compliant, but not AEC-Q101 qualified. However, Vishay offers the P6SMB43A-HM3_B variant (with _B suffix) that is fully AEC-Q101 qualified for automotive use. Engineers specifying P6SMB43A-M3/5B for automotive applications should verify whether the _B suffix version is required for qualification compliance. The P6SMB43A-M3/5B itself remains suitable for industrial and consumer systems.
What is the standoff voltage (VWM) and why does it matter for P6SMB43A-M3/5B selection?
The P6SMB43A-M3/5B has a maximum reverse stand-off voltage (VWM) of 36.8 V, meaning it remains non-conductive and draws <1.0 µA leakage current up to this voltage. This parameter ensures the P6SMB43A-M3/5B does not interfere with normal 36 V nominal system operation (e.g., 24 V or 48 V rails with ripple), while still triggering reliably above 40.9 V. Selecting a VWM ≥10–15% below the system's maximum steady-state voltage prevents false triggering.
Can the P6SMB43A-M3/5B be used in bidirectional configurations?
No - the P6SMB43A-M3/5B is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. For bidirectional protection, Vishay offers the P6SMB43CA-M3/5B (with "CA" suffix), which provides symmetrical clamping in both polarities. Using the unidirectional P6SMB43A-M3/5B in AC or floating signal paths risks forward conduction and failure; always match device polarity to circuit topology. The P6SMB43A-M3/5B is intended for DC rail or referenced signal line protection only.
What is the thermal resistance and how does it affect PCB layout for P6SMB43A-M3/5B?
The P6SMB43A-M3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain TJ ≤150 °C at full 600 W pulse, minimize pad thermal isolation and avoid narrow traces. Derating begins above 25 °C ambient - at 85 °C, maximum allowable pulse repetition drops significantly. Proper layout directly determines the P6SMB43A-M3/5B's surge endurance and long-term reliability.
P6SMB43A-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):
- 36.8V
- Voltage - Breakdown (Min):
- 40.9V
- Voltage - Clamping (Max) @ Ipp:
- 59.3V
- Current - Peak Pulse (10/1000µs):
- 10.1A
- 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)
P6SMB43A-M3/5B FAQ
1.How can I place an order for P6SMB43A-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB43A-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 P6SMB43A-M3/5B reliable?
The price and inventory of P6SMB43A-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 P6SMB43A-M3/5B is usually 5 days.
3.What payment methods are accepted for P6SMB43A-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB43A-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB43A-M3/5B?
P6SMB43A-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB43A-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 P6SMB43A-M3/5B?
For technical support, including P6SMB43A-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB43A-M3/5B requirements.
6.How does Aetrix verify that P6SMB43A-M3/5B is sourced from the original manufacturer or authorized distributors?
All P6SMB43A-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 P6SMB43A-M3/5B meets industry standards.
7.What is the process for return or replacement of P6SMB43A-M3/5B?
All P6SMB43A-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB43A-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 P6SMB43A-M3/5B part is unused and in its original packaging.
Return procedure for P6SMB43A-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB43A-M3/5B Tags
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