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Vishay General Semiconductor - Diodes Division P6SMB20CA-M3/5B
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- Part No.:
- P6SMB20CA-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB20CA-M3/5B.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,283
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Product details
Overview
P6SMB20CA-M3/5B from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, with 20 V standoff voltage (VWM), 22.8–25.2 V breakdown voltage (VBR at 1 mA), and 27.7 V maximum clamping voltage (VC) at 21.7 A peak pulse current. It delivers 600 W peak pulse power (10/1000 µs waveform) and is halogen-free, RoHS-compliant, and rated for -65 °C to +150 °C operation - deployed for ESD and surge protection on sensor signal lines and MOSFET gate drivers in industrial control systems.
For engineers reviewing the P6SMB20CA-M3/5B datasheet, P6SMB20CA-M3/5B pinout, P6SMB20CA-M3/5B application, or P6SMB20CA-M3/5B equivalent, key selection criteria include bidirectional clamping symmetry, low clamping ratio (VC/VWM = 1.39), MSL Level 1 reflow compatibility, thermal resistance (RθJA = 100 °C/W), and AEC-Q101 qualification availability via alternate suffixes.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, enabling robust protection against voltage transients induced by inductive load switching or lightning surges without polarity sensitivity. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 µA at VWM), while the low incremental surge resistance supports fast energy dissipation during repetitive 0.01% duty cycle pulses.
The device is optimized for automated SMT placement on standard PCB pads (0.2" × 0.2" copper per terminal) and maintains clamping performance across its full operating temperature range. Its 20 V VWM aligns with 24 V industrial bus and sensor interface rails, and its 27.7 V VC ensures safe margin below typical 30 V absolute maximum ratings of protected ICs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 20 V - Maximum continuous reverse voltage before conduction; sets protection threshold for 24 V nominal systems. |
| VBR (Breakdown) | 22.8–25.2 V at 1 mA - Confirmed breakdown onset range; guarantees reliable triggering above VWM with margin. |
| VC (Clamping) | 27.7 V at 21.7 A - Peak voltage seen by protected circuit during 600 W transient; enables safe operation of 30 V-rated components. |
| PPPM | 600 W (10/1000 µs) - Surge handling capacity for common lightning/inductive spike waveforms; validated per IEC 61000-4-5. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard pad layout; informs derating above 25 °C ambient. |
| TJ max. | +150 °C - Maximum junction temperature; supports operation in sealed enclosures or high-temperature industrial environments. |
| Package | SMB (DO-214AA) - Low-profile SMT footprint (4.57 mm × 3.94 mm); compatible with standard pick-and-place and reflow processes. |
Pinout & Package
SMB (DO-214AA) surface-mount package with symmetrical bidirectional terminals: no cathode/anode marking; both leads are electrically identical and interchangeable. Device is unmarked per bidirectional specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path | Both terminals conduct equally in either direction during overvoltage events; no polarity orientation required on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns. |
| 600 W peak pulse power | Meets IEC 61000-4-5 Level 4 surge immunity requirements for industrial equipment interfaces. |
| MSL Level 1 rating | Supports lead-free reflow up to 260 °C peak without preconditioning; eliminates moisture sensitivity handling overhead. |
| Halogen-free & RoHS-compliant | Fulfills environmental compliance for EU, China, and global electronics manufacturing programs. |
| Low clamping ratio (VC/VWM = 1.39) | Minimizes stress on downstream components compared to higher-ratio suppressors in same voltage class. |
Applications
| Industrial Sensor Interface Protection | Automotive Body Control Module (BCM) Signal Lines |
|---|---|
|
Use Scenario: Protecting analog output (4–20 mA) and digital I/O lines of pressure, temperature, and position sensors in factory automation panels exposed to relay coil flyback and motor drive noise. IC Role / Device Role / Timing Role: Bidirectional TVS placed directly at connector entry point to shunt transients before reaching precision ADCs or microcontroller GPIOs. Use Value: Prevents latch-up or permanent damage to 24 V rail-connected sensor signal conditioners by clamping spikes to ≤27.7 V within nanoseconds. |
Use Scenario: Safeguarding LIN bus and discrete switch inputs in BCMs subjected to load dump and jump-start voltage excursions per ISO 7637-2. IC Role / Device Role / Timing Role: Standoff-rated TVS on each protected line, operating in parallel with internal ESD diodes to handle high-energy transients beyond IC-level capability. Use Value: Maintains functional integrity of 12 V automotive subsystems by limiting transient overvoltage to <30 V, well below MCU IO absolute maximum ratings. |
| Telecom Power Supply Input Stage | Consumer Appliance Motor Driver Feedback Loop |
|
Use Scenario: Secondary-side transient suppression on 24 V telecom power distribution boards where DC-DC converters feed sensitive PHY and timing ICs. IC Role / Device Role / Timing Role: Fast-response clamp between VIN and GND, absorbing coupled surges from upstream AC/DC or PoE injectors. Use Value: Ensures uninterrupted operation of clock generators and Ethernet PHYs by holding rail voltage within ±10% of nominal during 600 W surges. |
Use Scenario: Shielding hall-effect sensor feedback paths in BLDC motor controllers inside washing machines and HVAC systems. IC Role / Device Role / Timing Role: Low-capacitance TVS on differential encoder or current-sense lines, minimizing signal distortion while blocking commutation-induced spikes. Use Value: Preserves closed-loop motor control accuracy by preventing false zero-crossing detection caused by >20 V transients on analog feedback signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20CA-T | Same VWM (20 V), slightly higher VC (29.2 V), identical SMB package and 600 W rating. | Marginally reduced clamping headroom; may require verification against tighter 30 V system limits. | Select when legacy design uses SMBJ series and board layout is fixed; verify thermal derating due to higher RθJA (110 °C/W). |
| 1.5SMC20CA | Higher power (1500 W), larger SMC (DO-214AB) package, same VWM/VC specs. | Requires PCB footprint change; suited for higher-energy threat environments (e.g., outdoor telecom). | Choose only if system-level surge testing exceeds IEC 61000-4-5 Level 4; avoid for space-constrained consumer or automotive modules. |
Compared with SMBJ20CA-T and 1.5SMC20CA, P6SMB20CA-M3/5B offers optimal balance of clamping performance, compact SMB footprint, and halogen-free compliance - making it preferred for high-volume industrial and automotive modules where board area, reflow compatibility, and environmental standards are critical.
Availability
P6SMB20CA-M3/5B is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, and telecom power supply input stages requiring stable component supply, consistent halogen-free material content, and MSL Level 1 reflow readiness.
Supply support for P6SMB20CA-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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P6SMB Series targets cost-sensitive, high-volume transient protection needs in industrial, automotive, and telecom systems - delivering standardized 600 W surge capability in compact SMB packages with AEC-Q101 qualification options.
FAQ
What is the clamping voltage of P6SMB20CA-M3/5B at its rated peak pulse current?
The P6SMB20CA-M3/5B has a maximum clamping voltage (VC) of 27.7 V at 21.7 A peak pulse current (IPPM), measured under the standard 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuits during surge events. The P6SMB20CA-M3/5B maintains this clamping performance due to its low incremental surge resistance and glass-passivated junction structure.
Is P6SMB20CA-M3/5B suitable for automotive applications?
P6SMB20CA-M3/5B itself is commercial-grade and halogen-free RoHS-compliant, but not AEC-Q101 qualified. However, Vishay offers the functionally identical P6SMB20CAHM3_B/5B variant - same electrical specs and SMB package - which carries AEC-Q101 qualification for automotive use. For non-automotive industrial or telecom designs, the P6SMB20CA-M3/5B provides full performance with lower cost and broader availability.
How does the bidirectional nature of P6SMB20CA-M3/5B affect PCB layout?
The P6SMB20CA-M3/5B has no polarity marking and operates identically in both directions, so PCB layout requires no orientation check during placement. Both terminals are functionally equivalent, eliminating risk of reverse installation. This simplifies automated assembly and enables use on AC-coupled, floating, or differential signal lines where voltage polarity reverses - unlike unidirectional TVS diodes that must be oriented with cathode toward the protected rail.
What is the thermal resistance of P6SMB20CA-M3/5B, and how does it impact power derating?
The P6SMB20CA-M3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads per terminal. At ambient temperatures above 25 °C, its 5.0 W steady-state power dissipation must be linearly derated - e.g., to ~3.5 W at 75 °C ambient. This derating ensures junction temperature stays within the +150 °C maximum, preserving long-term reliability during sustained leakage or frequent low-energy transients.
Does P6SMB20CA-M3/5B meet moisture sensitivity requirements for lead-free reflow?
Yes, P6SMB20CA-M3/5B meets MSL Level 1 per J-STD-020, with a maximum lead-free reflow peak temperature of 260 °C. No floor life limitation or baking preconditioning is required prior to assembly. This simplifies manufacturing logistics and reduces process risk in high-throughput SMT lines - a key advantage over MSL Level 2a or higher devices that demand strict humidity control and time-bound placement.
P6SMB20CA-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):
- 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-M3/5B FAQ
1.How can I place an order for P6SMB20CA-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB20CA-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 P6SMB20CA-M3/5B reliable?
The price and inventory of P6SMB20CA-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 P6SMB20CA-M3/5B is usually 5 days.
3.What payment methods are accepted for P6SMB20CA-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB20CA-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB20CA-M3/5B?
P6SMB20CA-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB20CA-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 P6SMB20CA-M3/5B?
For technical support, including P6SMB20CA-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB20CA-M3/5B requirements.
6.How does Aetrix verify that P6SMB20CA-M3/5B is sourced from the original manufacturer or authorized distributors?
All P6SMB20CA-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 P6SMB20CA-M3/5B meets industry standards.
7.What is the process for return or replacement of P6SMB20CA-M3/5B?
All P6SMB20CA-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB20CA-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 P6SMB20CA-M3/5B part is unused and in its original packaging.
Return procedure for P6SMB20CA-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB20CA-M3/5B Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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