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Vishay General Semiconductor - Diodes Division P6SMB20A-E3/5B
- Part No.:
- P6SMB20A-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB20A-E3/5B.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,034
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Product details
Overview
P6SMB20A-E3/5B from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, rated for 20 V standoff voltage (VWM), 21.0 V maximum breakdown voltage (VBR), and 27.7 V clamping voltage (VC) at 21.7 A peak pulse current (IPPM). It delivers 600 W peak pulse power with 10/1000 µs waveform and is used to protect MOSFETs, ICs, and sensor signal lines against inductive switching transients in industrial and automotive electronics.
For engineers reviewing the P6SMB20A-E3/5B datasheet, P6SMB20A-E3/5B pinout, P6SMB20A-E3/5B application, or P6SMB20A-E3/5B equivalent, this part serves as a RoHS-compliant, commercial-grade unidirectional TVS with MSL Level 1 moisture sensitivity, matte tin-plated leads, and verified clamping performance under repetitive surge conditions.
Technical Context
The P6SMB20A-E3/5B operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold (19.0–21.0 V at 1 mA test current). Its low incremental surge resistance and fast response time enable effective suppression of transient energy before downstream components are stressed.
Designed for surface-mount assembly on standard PCB copper pads (0.2" × 0.2"), it features glass-passivated junction construction, UL 94 V-0 molding compound, and thermal resistance of 100 °C/W (junction-to-ambient) - requiring no heatsink for typical 600 W single-pulse events under defined mounting conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 17.1 V - Maximum continuous reverse operating voltage before significant leakage; ensures stable operation below 17.1 V in normal circuit conditions. |
| VBR (Breakdown Voltage) | 19.0–21.0 V at 1 mA - Confirmed avalanche initiation range; defines precise turn-on threshold for transient clamping. |
| VC (Clamping Voltage) | 27.7 V at 21.7 A IPPM - Peak voltage seen by protected circuit during 10/1000 µs surge; limits stress on downstream ICs or MOSFETs. |
| PPPM (Peak Pulse Power) | 600 W - Sustains one-time or low-duty-cycle (0.01 %) surges without failure; validated per Fig. 1 and Fig. 2 derating curves. |
| IPPM (Peak Pulse Current) | 21.7 A - Maximum non-repetitive surge current supported with 10/1000 µs waveform; determines minimum trace/solder joint robustness required. |
| TJmax | 150 °C - Maximum junction temperature; sets upper limit for ambient + self-heating under sustained power dissipation (PD = 5.0 W). |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with cathode band marking; compatible with automated pick-and-place and reflow profiles up to 260 °C peak. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; cathode indicated by band at one end; polarity critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path); conducts during forward-biased ESD events or fault conditions. |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., signal or power rail); initiates avalanche conduction when reverse voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power rating | Enables protection against high-energy transients (e.g., ISO 7637-2 Pulse 1/2a/5a) without derating in standard PCB layouts. |
| Glass passivated chip junction | Ensures long-term reliability and stable VBR over temperature and lifetime; reduces parameter drift under thermal cycling. |
| MSL Level 1 (J-STD-020) | Allows unlimited floor life and standard reflow without baking; simplifies manufacturing logistics for high-volume SMT lines. |
| RoHS-compliant, commercial grade | Meets EU Directive 2011/65/EU; suitable for consumer, industrial, and telecom applications where AEC-Q101 is not mandated. |
| Low profile SMB package | 0.130" × 0.155" footprint (3.30 mm × 3.94 mm); enables compact placement near connectors or ICs without sacrificing surge margin. |
Applications
| Automotive Sensor Signal Protection | Industrial PLC Input Protection |
|---|---|
|
Use Scenario: Protecting analog sensor outputs (e.g., pressure, temperature) from load-dump or inductive kickback in 12 V vehicle subsystems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor output line and ground, clamping transients before they reach ADC input or microcontroller GPIO. Use Value: Limits voltage excursion to ≤27.7 V during 21.7 A surges, preventing latch-up or permanent damage to 3.3 V/5 V interface circuitry. |
Use Scenario: Safeguarding digital input channels on programmable logic controllers exposed to relay coil switching noise in factory automation cabinets. IC Role / Device Role / Timing Role: Standoff-rated TVS on 24 V DC input lines, absorbing repetitive 600 W pulses from inductive loads without degradation. Use Value: Maintains <1 µA leakage at 17.1 V, ensuring clean logic-level detection while surviving >1000 surge events per IEC 61000-4-5 compliance testing. |
| Telecom Line Interface Protection | Consumer Power Supply EMI Filtering |
|
Use Scenario: Shielding Ethernet PHY or RS-485 transceivers from lightning-induced surges on outdoor cabling in network infrastructure equipment. IC Role / Device Role / Timing Role: First-stage clamping device on differential pair lines, working with common-mode chokes and GDTs in multi-stage protection schemes. Use Value: Fast response (<1 ns) and low VC/VBR ratio (1.46) minimize let-through energy to secondary protection stages and preserve signal integrity. |
Use Scenario: Suppressing switching noise and cross-talk on 5 V/12 V rails inside AC-DC adapters and USB-C PD chargers. IC Role / Device Role / Timing Role: Localized TVS across bulk capacitors or post-regulator outputs to dampen ringing and overshoot during load transients. Use Value: 27.7 V clamping prevents overvoltage stress on downstream LDOs or USB port controllers during 10/1000 µs line disturbances. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20A | Same VWM (17.1 V), identical SMB package, but lower PPPM (400 W) and higher VC (32.4 V at 12.3 A). | Less robust for high-energy transients; suitable only where surge amplitude or repetition rate is reduced. | Select SMAJ20A only if system-level testing confirms 400 W rating suffices and layout allows tighter thermal management. |
| 1.5SMC20A | Larger SMC (DO-214AB) package, same electrical specs (VWM = 17.1 V, VC = 27.7 V), but higher thermal mass and RθJA = 60 °C/W. | Better sustained power handling but requires larger PCB area; incompatible with dense SMB footprints. | Choose 1.5SMC20A when board space permits and long-duration surge immunity (e.g., >100 ms) is prioritized over miniaturization. |
Compared with SMAJ20A and 1.5SMC20A, the P6SMB20A-E3/5B uniquely balances 600 W surge capability, SMB footprint constraints, and commercial-grade manufacturability - making it optimal for cost-sensitive, space-constrained industrial and automotive modules requiring repeatable surge resilience without AEC-Q101 certification.
Availability
P6SMB20A-E3/5B is available at Aetrix Electronics and suitable for industrial PLC input protection, automotive sensor signal conditioning, telecom line interface hardening, and consumer power supply EMI filtering requiring stable component supply and full traceability.
Supply support for P6SMB20A-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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on reliability, precision, and application-specific performance across automotive, industrial, and computing markets.
The P6SMB20A-E3/5B belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-power transient suppression in surface-mount systems where compact size, consistent clamping, and automated assembly compatibility are essential.
FAQ
What is the maximum clamping voltage of the P6SMB20A-E3/5B under standard test conditions?
The P6SMB20A-E3/5B has a maximum clamping voltage (VC) of 27.7 V at 21.7 A peak pulse current with a 10/1000 µs waveform, as specified in the Vishay datasheet (Document Number: 88370, Rev. 09-Jan-2024). This value represents the highest voltage imposed on the protected circuit during a standardized surge event and is measured across the device terminals under controlled thermal conditions.
Is the P6SMB20A-E3/5B RoHS-compliant and halogen-free?
Yes, the P6SMB20A-E3/5B carries the "E3" suffix, indicating it is RoHS-compliant and meets commercial-grade environmental requirements. However, it is not halogen-free; halogen-free versions use the "M3" suffix (e.g., P6SMB20A-M3/5B). The E3 variant uses standard molding compound compliant with Directive 2011/65/EU but does not meet IEC 61249-2-21 halogen-free thresholds.
Does the P6SMB20A-E3/5B require a heatsink for normal operation?
No, the P6SMB20A-E3/5B does not require an external heatsink for single-pulse or low-duty-cycle surge events. Its thermal resistance (RθJA) is 100 °C/W when mounted on 0.2" × 0.2" copper pads per datasheet condition. Continuous power dissipation is limited to 5.0 W at 50 °C ambient, and typical transient suppression occurs well within safe junction temperature limits (TJ ≤ 150 °C) without added thermal mass.
What is the meaning of the "/5B" in P6SMB20A-E3/5B?
The "/5B" suffix in P6SMB20A-E3/5B denotes the packaging configuration: it indicates the device is supplied on a 13-inch diameter plastic tape and reel, with a standard quantity of 3200 units per reel. This format supports high-speed automated placement in SMT production lines and aligns with IPC-7351 standards for SMB (DO-214AA) component handling.
Can the P6SMB20A-E3/5B be used in automotive applications requiring AEC-Q101 qualification?
No, the P6SMB20A-E3/5B is not AEC-Q101 qualified. It is a commercial-grade part (E3 suffix). For automotive applications requiring AEC-Q101 validation, engineers must select the P6SMB20AHE3_B variant (with "HE3_B" suffix), which is explicitly qualified per AEC-Q101 and documented in the same datasheet revision (Note 1, page 3). Using P6SMB20A-E3/5B in such contexts requires additional system-level validation and carries no manufacturer warranty for automotive stress conditions.
P6SMB20A-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:
- 1
- Bidirectional Channels:
- -
- 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)
P6SMB20A-E3/5B FAQ
1.How can I place an order for P6SMB20A-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB20A-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 P6SMB20A-E3/5B reliable?
The price and inventory of P6SMB20A-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 P6SMB20A-E3/5B is usually 5 days.
3.What payment methods are accepted for P6SMB20A-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB20A-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB20A-E3/5B?
P6SMB20A-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB20A-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 P6SMB20A-E3/5B?
For technical support, including P6SMB20A-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB20A-E3/5B requirements.
6.How does Aetrix verify that P6SMB20A-E3/5B is sourced from the original manufacturer or authorized distributors?
All P6SMB20A-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 P6SMB20A-E3/5B meets industry standards.
7.What is the process for return or replacement of P6SMB20A-E3/5B?
All P6SMB20A-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB20A-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 P6SMB20A-E3/5B part is unused and in its original packaging.
Return procedure for P6SMB20A-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB20A-E3/5B Tags
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