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Vishay General Semiconductor - Diodes Division P6SMB20CA-E3/5B
- Part No.:
- P6SMB20CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB20CA-E3/5B.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,150
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Product details
Overview
P6SMB20CA-E3/5B from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, rated for 20 V standoff voltage (VWM), 22.2 V minimum breakdown voltage (VBR), and 600 W peak pulse power (10/1000 μs). It clamps transients to ≤32.4 V at 18.5 A peak pulse current and is designed for protecting signal lines and power rails in automotive sensor units, industrial I/O modules, and telecom interface circuits.
For engineers reviewing the P6SMB20CA-E3/5B datasheet, P6SMB20CA-E3/5B pinout, P6SMB20CA-E3/5B application, or P6SMB20CA-E3/5B equivalent, key selection criteria include bidirectional clamping capability, 22.2–24.6 V VBR range at 1 mA, 32.4 V max clamping voltage at IPPM, RoHS-compliant matte tin terminals, and AEC-Q101 qualification eligibility via HE3/HM3 suffix variants.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable leakage (<1.0 μA at 17.1 V) and fast response time (<1.0 ns), critical for suppressing ESD and inductive switching spikes.
The device delivers 600 W peak pulse power under standardized 10/1000 μs waveform conditions with 0.01% duty cycle, and exhibits low incremental surge resistance - directly supporting robust clamping performance across repeated transient events. Thermal resistance is specified at RθJA = 100 °C/W and RθJL = 20 °C/W, confirming suitability for PCB-mounted operation without heatsinking under typical derating conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 17.1 V - Maximum continuous reverse voltage before significant conduction begins; defines operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 22.2–24.6 V at IT = 1 mA - Voltage at which device enters avalanche breakdown; ensures reliable triggering during overvoltage events. |
| VC (Clamping Voltage) | 32.4 V at IPPM = 18.5 A - Maximum voltage seen by protected circuit during 600 W transient; determines downstream component stress. |
| PPPM (Peak Pulse Power) | 600 W (10/1000 μs) - Sustained transient energy handling capacity; validates compliance with IEC 61000-4-5 Level 3/4 surge immunity. |
| ID (Reverse Leakage) | 1.0 μA max at VWM - Minimal standby current; preserves signal integrity and battery life in low-power systems. |
| TJ max | 150 °C - Maximum junction temperature; supports operation in under-hood automotive and industrial ambient environments. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 0.205" × 0.220" footprint; compatible with automated pick-and-place and reflow soldering. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case meeting UL 94 V-0 flammability rating; matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; no polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional terminal pair | Either terminal serves as anode or cathode depending on transient polarity; enables AC line or differential bus protection without orientation constraints. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, RS-485 buses, and ungrounded sensor outputs without external polarity management. |
| 600 W peak pulse power | Meets IEC 61000-4-5 surge immunity requirements for industrial and automotive electronics up to Level 4 (4 kV line-to-ground). |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage exposure to downstream ICs such as microcontrollers, CAN transceivers, and ADC front-ends. |
| AEC-Q101 qualification option | HE3/HM3 suffix variants support automotive-grade reliability testing including temperature cycling, HTRB, and ESD-HBM ≥8 kV. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profiles up to 260 °C peak, simplifying manufacturing integration. |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
|
Use Scenario: Protecting LIN/CAN node sensors (e.g., temperature, pressure) from load dump and ISO 7637-2 pulses in vehicle body control modules. IC Role / Device Role: Primary transient shunt element placed at connector entry point before signal conditioning amplifier or MCU input. Use Value: Clamps 10/1000 μs surges to ≤32.4 V while maintaining <1 μA leakage at 17.1 V, preserving sensor accuracy and MCU GPIO integrity. |
Use Scenario: Safeguarding half-duplex RS-485 transceivers (e.g., SN65HVD230) against EFT bursts and lightning-induced surges in factory automation PLCs. IC Role / Device Role: Bidirectional TVS across differential A/B lines and common-mode GND, referenced to isolated power domain. Use Value: Symmetric clamping prevents data corruption during ±32.4 V transients, ensuring >1 Mbps communication continuity under IEC 61000-4-4 Level 4 stress. |
| Telecom Line Interface | Consumer USB Port ESD Protection |
|
Use Scenario: Shielding Ethernet PHY magnetics and PoE injectors from induced surges on outdoor telecom drop cables exposed to lightning coupling. IC Role / Device Role: Secondary-level protector located after gas discharge tube (GDT) primary stage, absorbing residual energy in common-mode path. Use Value: 600 W rating handles decaying tail of multi-kV surges; 150 °C TJ max supports operation inside sealed outdoor enclosures. |
Use Scenario: Adding robust ESD immunity to USB 2.0 D+/D− lines in smart home hubs, where human-contact events exceed IEC 61000-4-2 ±8 kV contact discharge. IC Role / Device Role: Low-capacitance (<100 pF typical at 0 V) bidirectional clamp placed adjacent to USB connector pins. Use Value: Sub-33 V clamping prevents latch-up in USB transceivers; SMB footprint allows placement within tight board space near connector edge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20CA | Same VWM (17.1 V), lower PPPM (400 W), larger SMA package (DO-214AC), higher RθJA (150 °C/W) | Limited to lower-energy transients; less suitable for IEC 61000-4-5 Level 4 or automotive load dump. | Select when cost sensitivity outweighs surge margin and board space permits larger footprint. |
| SMCJ20CA | Same VWM (17.1 V), higher PPPM (1500 W), larger SMC package (DO-214AB), same RθJA (100 °C/W) | Overqualified for most 600 W use cases; requires larger pad layout and higher assembly cost. | Choose only when system-level surge testing exceeds 600 W or long-term reliability under repeated stress is critical. |
Compared with SMAJ20CA and SMCJ20CA, P6SMB20CA-E3/5B delivers optimal balance of 600 W surge capability, SMB footprint efficiency, and thermal performance - making it the preferred choice for space-constrained industrial and automotive designs requiring validated IEC/ISO compliance without over-engineering.
Availability
P6SMB20CA-E3/5B is available at Aetrix Electronics and suitable for automotive sensor protection, industrial RS-485 interfaces, telecom line shielding, and consumer USB port ESD hardening requiring stable component supply and full traceability.
Supply support for P6SMB20CA-E3/5B 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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for industrial, automotive, and computing markets.
The P6SMB Series is engineered for robust transient suppression in harsh environments, targeting applications demanding AEC-Q101 qualification readiness, high pulse power density, and compatibility with automated SMT assembly lines.
FAQ
What is the maximum clamping voltage of the P6SMB20CA-E3/5B under a 10/1000 μs surge?
The P6SMB20CA-E3/5B clamps to a maximum of 32.4 V when subjected to its rated peak pulse current of 18.5 A under the standardized 10/1000 μs waveform. This value is measured at the device terminals and represents the highest voltage imposed on the protected circuit during transient suppression - a critical parameter for ensuring downstream ICs remain within absolute maximum ratings. The P6SMB20CA-E3/5B achieves this with minimal overshoot due to its low incremental surge resistance and fast avalanche response.
Is the P6SMB20CA-E3/5B suitable for automotive applications?
Yes, the P6SMB20CA-E3/5B is RoHS-compliant and compatible with AEC-Q101 qualification when ordered with HE3 or HM3 suffixes (e.g., P6SMB20CAHE3_B). While the -E3/5B variant itself is commercial-grade, its construction - including glass-passivated junction, MSL Level 1 rating, and 150 °C TJ max - meets foundational automotive reliability requirements. System designers commonly deploy P6SMB20CA-E3/5B in non-safety-critical automotive subsystems such as body electronics and infotainment interfaces, with qualified variants used in engine control and ADAS domains.
How does the bidirectional design of the P6SMB20CA-E3/5B affect PCB layout?
The bidirectional nature of the P6SMB20CA-E3/5B eliminates polarity constraints during placement - there is no cathode band or orientation requirement on the SMB package. This simplifies PCB layout for differential or AC-coupled lines (e.g., RS-485, CAN, Ethernet), reduces assembly errors, and allows symmetrical routing without dedicated silkscreen indicators. Engineers can place the P6SMB20CA-E3/5B directly across signal pairs or between line and ground with identical protection behavior regardless of transient direction, streamlining layout validation and reducing BOM variants.
What is the reverse leakage current specification for the P6SMB20CA-E3/5B at its rated standoff voltage?
The P6SMB20CA-E3/5B exhibits a maximum reverse leakage current (ID) of 1.0 μA at its rated standoff voltage of 17.1 V and TA = 25 °C. This ultra-low leakage ensures negligible power loss in always-on circuits and preserves signal fidelity in high-impedance sensor interfaces. At elevated temperatures (e.g., 85 °C), leakage remains well below 10 μA - verified in Vishay's characterization data - supporting stable operation in industrial and automotive ambient conditions without compromising system quiescent current budgets.
Does the P6SMB20CA-E3/5B require a heatsink for standard operation?
No, the P6SMB20CA-E3/5B does not require an external heatsink under normal operating conditions. Its thermal resistance is specified at RθJA = 100 °C/W with standard 0.2" × 0.2" copper pads per terminal, and its steady-state power dissipation is limited to PD = 5.0 W - far below the 600 W peak pulse rating, which applies only to short-duration transients (≤50 ms). Continuous DC power handling remains within safe limits even at +125 °C ambient, provided PCB copper area meets Vishay's recommended pad layout. The P6SMB20CA-E3/5B is designed for direct PCB mounting with no additional thermal infrastructure.
P6SMB20CA-E3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- P6SMB, TransZorb®
- Packaging:
- Tape & Reel (TR)
- 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 (SMB)
P6SMB20CA-E3/5B FAQ
1.How can I place an order for P6SMB20CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB20CA-E3/5B 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-E3/5B reliable?
The price and inventory of P6SMB20CA-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB20CA-E3/5B is usually 5 days.
3.What payment methods are accepted for P6SMB20CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB20CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB20CA-E3/5B?
P6SMB20CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB20CA-E3/5B 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-E3/5B?
For technical support, including P6SMB20CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB20CA-E3/5B requirements.
6.How does Aetrix verify that P6SMB20CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All P6SMB20CA-E3/5B 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-E3/5B meets industry standards.
7.What is the process for return or replacement of P6SMB20CA-E3/5B?
All P6SMB20CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB20CA-E3/5B, 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-E3/5B part is unused and in its original packaging.
Return procedure for P6SMB20CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB20CA-E3/5B Tags
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