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Vishay General Semiconductor - Diodes Division P6SMB20CA-M3/52
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- Part No.:
- P6SMB20CA-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB20CA-M3/52.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,137
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Product details
Overview
P6SMB20CA-M3/52 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, rated for 600 W peak pulse power (10/1000 μs), 20 V standoff voltage (VWM), and clamping voltage of 27.7 V at 21.7 A peak pulse current - deployed for ESD and surge protection on signal lines and power rails in automotive sensor interfaces and industrial I/O modules.
For engineers reviewing the P6SMB20CA-M3/52 datasheet, P6SMB20CA-M3/52 pinout, P6SMB20CA-M3/52 application, or P6SMB20CA-M3/52 equivalent, key selection criteria include bidirectional clamping behavior, 27.7 V VC at IPPM, halogen-free RoHS compliance (M3 suffix), AEC-Q101 qualification eligibility, and SMB package thermal resistance (RθJA = 100 °C/W).
Technical Context
This TVS operates symmetrically in both directions due to its bidirectional construction, enabling suppression of positive and negative transients without polarity sensitivity. It features glass-passivated junctions for stable breakdown characteristics and low incremental surge resistance, with clamping response time under 1 ns.
Designed for automated SMT assembly, it meets J-STD-020 MSL Level 1 (peak reflow 260 °C) and JESD201 Class 2 whisker resistance. Its 150 °C maximum junction temperature and 5.0 W steady-state power dissipation support operation in thermally constrained environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 20 V - Maximum continuous reverse voltage before conduction begins; defines operating margin below clamping threshold. |
| VBR (Breakdown) | 21.0 V min / 23.1 V max at 1 mA - Confirmed avalanche onset range ensuring predictable turn-on during transients. |
| VC (Clamping) | 27.7 V at 21.7 A (10/1000 μs) - Peak voltage seen by protected circuit during worst-case surge; critical for IC voltage tolerance alignment. |
| PPPM | 600 W - Surge energy handling capacity per single transient event; enables robust protection against IEC 61000-4-5 Level 3/4 surges. |
| Package | SMB (DO-214AA) - 3.94 mm × 2.20 mm footprint with 2.18 mm minimum cathode band width; compatible with standard 0.2" × 0.2" copper pad layout. |
| Compliance | Halogen-free, RoHS-compliant (M3 suffix); AEC-Q101 qualified versions available (HM3 suffix variants). |
Pinout & Package
Two-terminal SMB (DO-214AA) package with no polarity marking for bidirectional operation; terminals are matte tin-plated and solderable per J-STD-002 and JESD22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative half-cycle) | Conducts during negative voltage excursions; symmetrical with cathode for bidirectional clamping. |
| Cathode | Transient current entry (positive half-cycle) | Conducts during positive voltage excursions; functionally identical to anode in CA devices. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines (e.g., RS-485, CAN, sensor bridges) without external polarity management. |
| 600 W peak pulse power | Supports immunity to high-energy transients including ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Combination Wave (1.2/50 μs + 8/20 μs). |
| Low clamping ratio (VC/VBR ≈ 1.32) | Minimizes overvoltage stress on downstream ICs - e.g., ensures <27.7 V reaches a 3.3 V or 5 V microcontroller I/O pin during surge. |
| MSL Level 1 rating | Permits direct placement into standard lead-free reflow profiles (peak 260 °C) without pre-baking, reducing manufacturing complexity. |
Applications
| Automotive Sensor Interface | Industrial PLC Analog Input |
|---|---|
Use Scenario: Protecting LIN bus transceivers and MEMS pressure sensor outputs from load dump and inductive switching noise in engine control units. IC Role / Device Role / Timing Role: Bidirectional TVS placed across signal pair (e.g., LIN+ and LIN−) to clamp ±2 kV EFT bursts and ±100 V load dump spikes. Use Value: Prevents latch-up or gate oxide damage in 5 V tolerant transceivers by limiting transient voltage to ≤27.7 V while maintaining signal integrity at 20 kHz bandwidth. | Use Scenario: Shielding 4–20 mA current loop inputs in programmable logic controllers from field wiring surges and electrostatic discharge. IC Role / Device Role / Timing Role: Mounted between input terminals and ground to shunt surge current away from precision op-amps and ADC front-ends. Use Value: Ensures analog measurement accuracy remains within ±0.1% FS after exposure to 1 kV/500 A surge events per IEC 61000-4-5. |
| Consumer USB-C Port Protection | Telecom Ethernet PHY Line |
Use Scenario: Safeguarding USB-C CC and VCONN lines against hot-plug ESD and cable-induced transients in portable docking stations. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed inline with CC detection path to avoid signal distortion during enumeration. Use Value: Provides >15 kV air-gap ESD immunity (IEC 61000-4-2) without degrading USB PD negotiation timing or voltage sensing resolution. | Use Scenario: Front-end protection for 10/100BASE-TX Ethernet PHYs exposed to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Installed across transformer-coupled pairs (TD+, TD−, RD+, RD−) to suppress common-mode transients before magnetics. Use Value: Maintains Ethernet link stability by clamping induced voltages to <30 V, preventing PHY reset or PHY register corruption during 6 kV surge tests. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20CA | Same VWM (20 V), lower PPPM (400 W), SMA package (smaller footprint, higher RθJA = 140 °C/W) | Limited to lower-energy transients; less suitable for automotive load dump where 600 W capability is required. | Select when board space is constrained and surge threat level is limited to IEC 61000-4-2/4-4 only. |
| 1.5SMC20CA | Same VWM (20 V), same PPPM (600 W), larger SMC (DO-214AB) package (7.11 mm × 6.22 mm) | Higher thermal mass improves repetitive surge handling but requires 2.5× more PCB area than SMB. | Choose for high-reliability industrial systems needing extended surge endurance and derated thermal performance. |
Compared with SMAJ20CA and 1.5SMC20CA, P6SMB20CA-M3/52 delivers optimal balance of 600 W surge capacity, compact SMB footprint, and halogen-free compliance - making it preferred for space-constrained automotive and industrial designs requiring AEC-Q101 readiness.
Availability
P6SMB20CA-M3/52 is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC analog inputs, consumer USB-C docking stations, and telecom Ethernet PHY protection requiring stable component supply across production lifecycles.
Supply support for P6SMB20CA-M3/52 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, efficiency, and application-specific optimization.
The P6SMB Series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-power, surface-mount transient suppression in automotive, industrial, and communications infrastructure where robustness and repeatability under surge stress are mandatory.
FAQ
What does the "CA" suffix indicate in P6SMB20CA-M3/52?
The "CA" suffix denotes a bidirectional configuration - meaning P6SMB20CA-M3/52 provides symmetrical clamping for both positive and negative voltage transients without polarity dependence. This distinguishes it from unidirectional variants (e.g., P6SMB20A), which require correct anode/cathode orientation and only protect one polarity. The CA version is ideal for AC signal lines and differential buses like CAN or RS-485.
Is P6SMB20CA-M3/52 AEC-Q101 qualified?
P6SMB20CA-M3/52 itself is not AEC-Q101 qualified; however, Vishay offers AEC-Q101 qualified versions under the HM3 suffix (e.g., P6SMB20CAHM3_B/H). The M3 suffix confirms halogen-free, RoHS-compliant construction, but automotive qualification requires explicit HM3 ordering codes and associated test documentation. Always verify qualification status using the full part number and Vishay's official product change notices.
What is the maximum clamping voltage of P6SMB20CA-M3/52 and how is it measured?
The maximum clamping voltage (VC) of P6SMB20CA-M3/52 is 27.7 V, measured at a peak pulse current (IPPM) of 21.7 A using a standardized 10/1000 μs double-exponential waveform. This value represents the highest voltage that appears across the device terminals during worst-case surge conditions and is critical for ensuring protected circuits remain within safe operating limits - for example, preserving functionality of 3.3 V or 5 V logic interfaces.
Can P6SMB20CA-M3/52 be used in place of a unidirectional TVS like P6SMB20A?
No - P6SMB20CA-M3/52 cannot directly replace unidirectional P6SMB20A without circuit review. While both share identical VWM (20 V) and VC (27.7 V), the CA variant conducts in both directions and lacks polarity marking, whereas the A variant has defined cathode polarity and blocks forward current. Substitution may cause unintended conduction paths in DC-biased circuits or violate biasing requirements in rectifier-based protection schemes.
What is the thermal resistance of P6SMB20CA-M3/52 and how does it affect PCB layout?
P6SMB20CA-M3/52 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. This value guides thermal design: for sustained 5.0 W power dissipation, ambient temperature must stay below 100 °C to keep junction temperature ≤150 °C. Layout best practices include maximizing copper area, avoiding thermal isolation, and ensuring both terminals connect to internal or external ground planes for effective heat spreading.
P6SMB20CA-M3/52 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):
- 17.1V
- Voltage - Breakdown (Min):
- 19V
- Voltage - Clamping (Max) @ Ipp:
- 27.7V
- Current - Peak Pulse (10/1000µs):
- 21.7A
- 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)
P6SMB20CA-M3/52 FAQ
1.How can I place an order for P6SMB20CA-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB20CA-M3/52 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 P6SMB20CA-M3/52 reliable?
The price and inventory of P6SMB20CA-M3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB20CA-M3/52 is usually 5 days.
3.What payment methods are accepted for P6SMB20CA-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB20CA-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB20CA-M3/52?
P6SMB20CA-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB20CA-M3/52 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 P6SMB20CA-M3/52?
For technical support, including P6SMB20CA-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB20CA-M3/52 requirements.
6.How does Aetrix verify that P6SMB20CA-M3/52 is sourced from the original manufacturer or authorized distributors?
All P6SMB20CA-M3/52 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 P6SMB20CA-M3/52 meets industry standards.
7.What is the process for return or replacement of P6SMB20CA-M3/52?
All P6SMB20CA-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB20CA-M3/52, 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 P6SMB20CA-M3/52 part is unused and in its original packaging.
Return procedure for P6SMB20CA-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB20CA-M3/52 Tags
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