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Vishay General Semiconductor - Diodes Division P6SMB43CA-M3/5B
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- Part No.:
- P6SMB43CA-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB43CA-M3/5B.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,427
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Product details
Overview
P6SMB43CA-M3/5B from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection on signal and power lines. It features a 36.8 V standoff voltage (VWM), 40.9–45.2 V breakdown voltage (VBR) at 1 mA, 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 - used in automotive sensor interfaces, industrial I/O protection, and telecom line surge suppression.
For engineers reviewing the P6SMB43CA-M3/5B datasheet, P6SMB43CA-M3/5B pinout, P6SMB43CA-M3/5B application, or P6SMB43CA-M3/5B equivalent, key selection criteria include bidirectional clamping capability, SMB (DO-214AA) package compatibility, AEC-Q101 qualification eligibility (via HM3 suffix), halogen-free RoHS compliance, and thermal resistance (RθJA = 100 °C/W) for board-level transient energy dissipation.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 μA at VWM), while the low incremental surge resistance supports fast clamping response under high-dI/dt events.
The device is rated for repetitive 10/1000 μs pulses at 0.01% duty cycle and derates linearly above 25 °C ambient per Fig. 2. Junction temperature is limited to 150 °C, and it meets J-STD-020 MSL Level 1 with 260 °C reflow peak, making it suitable for automated SMT assembly in high-reliability environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 36.8 V - Maximum continuous reverse voltage before significant conduction; defines operating margin below clamping threshold. |
| VBR (Breakdown) | 40.9–45.2 V at 1 mA - Confirmed breakdown range ensuring reliable turn-on during transients without premature conduction. |
| VC (Clamping) | ≤59.3 V at 10.1 A - Peak voltage seen by protected circuit during 10/1000 μs surge; determines downstream IC survivability. |
| PPPM | 600 W - Peak transient power handling capacity; enables protection against IEC 61000-4-5 Level 4 surges when properly mounted. |
| RθJA | 100 °C/W - Thermal resistance from junction to ambient; requires ≥5.0 mm × 5.0 mm copper pads per terminal for full rating. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood automotive and industrial control enclosures. |
| Package | SMB (DO-214AA) - Standardized 2-pin SMD outline with 0.220" × 0.130" footprint; compatible with JEDEC MS-012AC and automated pick-and-place. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Case dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | Conducts during positive voltage excursions beyond VBR; forms symmetrical path with cathode for bidirectional clamping. |
| Cathode | Transient current entry (negative half-cycle) | Conducts during negative voltage excursions beyond VBR; enables protection of AC or floating signal lines without DC bias dependency. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of differential pairs, AC lines, or ungrounded interfaces without polarity concerns. |
| 600 W peak pulse power (10/1000 μs) | Meets IEC 61000-4-5 surge immunity requirements for industrial and automotive electronics with proper PCB layout. |
| Glass passivated junction | Ensures long-term stability of VBR and low leakage (<1.0 μA) across temperature and lifetime stress conditions. |
| Halogen-free, RoHS-compliant (M3 suffix) | Complies with environmental regulations for global OEM supply chains and eliminates corrosive halogen emissions during reflow or failure. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT processes without pre-baking or special handling; reduces manufacturing complexity. |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting CAN FD or LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD in engine control units. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point to shunt transients before reaching signal conditioning ICs. Use Value: Maintains signal integrity during ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-2 ESD events up to ±15 kV contact discharge. |
Use Scenario: Safeguarding PLC digital input modules against induced surges from relay coil switching and motor drive noise in factory automation systems. IC Role / Device Role / Timing Role: Parallel-connected TVS on each 24 V DC input channel to limit transient voltage to safe levels for optocoupler or Schmitt trigger inputs. Use Value: Prevents false triggering and latch-up in microcontroller GPIOs by clamping spikes to ≤59.3 V within <1 ns response time. |
| Telecom Line Interface | Consumer USB/Display Port ESD Guard |
Use Scenario: Shielding RS-485 transceivers and Ethernet PHYs in base station backhaul equipment from lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Primary surge suppression stage ahead of secondary GDT or polymer PTC devices in multi-stage protection architecture. Use Value: Absorbs up to 600 W of transient energy per line pair, reducing stress on downstream protection components and extending system MTBF. |
Use Scenario: Adding board-level ESD robustness to USB 2.0 data lines and DisplayPort AUX channels in laptops and docking stations. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF typical at 0 V) bidirectional clamp placed adjacent to connector to minimize signal distortion. Use Value: Passes IEC 61000-4-2 Level 4 (±8 kV contact) without degradation, preserving signal rise/fall times on high-speed differential pairs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43CA-T | Same VWM/VBR/VC specs; identical SMB package; 600 W rating; but uses different material set (non-halogen-free) and lacks M3 suffix compliance. | Not qualified for halogen-free production lines; may require additional compliance validation for EU/Asia OEM programs. | Select when halogen content is not restricted and cost optimization is prioritized over environmental certification. |
| 1.5SMC43CA | Higher power rating (1500 W), larger SMC (DO-214AB) package; same VWM/VBR range; RθJA ≈ 50 °C/W with larger pads. | Requires PCB redesign due to 7.11 mm × 6.22 mm footprint; suited for higher-energy threat environments (e.g., outdoor telecom). | Choose only if surge energy exceeds 600 W capability and board space allows SMC package; not drop-in compatible. |
Compared with SMBJ43CA-T and 1.5SMC43CA, P6SMB43CA-M3/5B uniquely combines halogen-free construction, AEC-Q101 qualification readiness (HM3 variant), and SMB footprint - delivering optimal balance of regulatory compliance, automotive suitability, and space-constrained design flexibility.
Availability
P6SMB43CA-M3/5B is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O hardening, and telecom line surge suppression requiring stable component supply, consistent halogen-free compliance, and support for high-volume SMT assembly.
Supply support for P6SMB43CA-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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific performance.
The P6SMB Series targets high-energy transient suppression in automotive, industrial, and communications systems, engineered for robustness under repetitive surge stress and compatibility with modern lead-free manufacturing.
FAQ
What is the maximum clamping voltage of the P6SMB43CA-M3/5B at its rated peak pulse current?
The P6SMB43CA-M3/5B has a maximum clamping voltage (VC) of 59.3 V at 10.1 A peak pulse current (IPPM) under a 10/1000 μs waveform. This value is measured per standard test conditions in the Vishay datasheet (Document Number: 88370, Rev. 09-Jan-2024) and defines the upper voltage limit imposed on protected circuitry during surge events. The P6SMB43CA-M3/5B maintains this clamping performance across its specified operating temperature range.
Is the P6SMB43CA-M3/5B suitable for automotive applications?
Yes - the P6SMB43CA-M3/5B is halogen-free and RoHS-compliant, and its base family (P6SMB) offers AEC-Q101 qualified variants (e.g., P6SMB43CAHM3_B). While the -M3/5B suffix itself denotes halogen-free commercial grade, it shares identical electrical and thermal specifications with qualified versions and is widely deployed in automotive sensor modules and body control units where AEC-Q101 testing is performed at the system level. The P6SMB43CA-M3/5B meets MSL Level 1 and withstands 260 °C reflow, supporting automotive manufacturing flow.
What does the "CA" suffix indicate in P6SMB43CA-M3/5B?
The "CA" suffix in P6SMB43CA-M3/5B designates a bidirectional configuration, meaning the device provides symmetrical transient voltage suppression for both positive and negative polarity surges. Unlike unidirectional "A" variants (e.g., P6SMB43A), the CA version has no cathode marking and functions identically in either direction - essential for protecting AC-coupled signals, differential buses (e.g., RS-485), or floating inputs. This is confirmed in the Vishay P6SMB datasheet section "DEVICES FOR BIDIRECTION APPLICATIONS".
What is the thermal resistance of the P6SMB43CA-M3/5B, and how does it affect PCB layout?
The P6SMB43CA-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 achieve rated 600 W pulse power, PCB layout must provide minimum pad area and adequate copper pour; reducing pad size increases RθJA, lowering safe surge energy handling. The P6SMB43CA-M3/5B datasheet specifies this mounting condition explicitly in the "MAXIMUM RATINGS" table and Fig. 2 derating curve.
How does the P6SMB43CA-M3/5B compare to unidirectional TVS diodes in circuit protection design?
The P6SMB43CA-M3/5B eliminates the need for polarity awareness in layout and supports AC or differential signal protection with one device, whereas unidirectional variants (e.g., P6SMB43A) require correct orientation and cannot protect negative transients without additional components. Its bidirectional behavior is intrinsic - verified by identical VBR and VC values in both directions - and makes the P6SMB43CA-M3/5B ideal for applications like telecom line interfaces and sensor bridges where DC bias is absent or variable.
P6SMB43CA-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:
- -
- Bidirectional Channels:
- 1
- 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)
P6SMB43CA-M3/5B FAQ
1.How can I place an order for P6SMB43CA-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB43CA-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 P6SMB43CA-M3/5B reliable?
The price and inventory of P6SMB43CA-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 P6SMB43CA-M3/5B is usually 5 days.
3.What payment methods are accepted for P6SMB43CA-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB43CA-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB43CA-M3/5B?
P6SMB43CA-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB43CA-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 P6SMB43CA-M3/5B?
For technical support, including P6SMB43CA-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB43CA-M3/5B requirements.
6.How does Aetrix verify that P6SMB43CA-M3/5B is sourced from the original manufacturer or authorized distributors?
All P6SMB43CA-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 P6SMB43CA-M3/5B meets industry standards.
7.What is the process for return or replacement of P6SMB43CA-M3/5B?
All P6SMB43CA-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB43CA-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 P6SMB43CA-M3/5B part is unused and in its original packaging.
Return procedure for P6SMB43CA-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB43CA-M3/5B Tags
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