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Vishay General Semiconductor - Diodes Division P6SMB20A-E3/52
- Part No.:
- P6SMB20A-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB20A-E3/52.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P6SMB20A-E3/52 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 - designed to protect MOSFETs, ICs, and sensor signal lines against inductive switching transients in industrial and automotive power electronics.
For engineers reviewing the P6SMB20A-E3/52 datasheet, P6SMB20A-E3/52 pinout, P6SMB20A-E3/52 application, or P6SMB20A-E3/52 equivalent, key selection criteria include its 600 W 10/1000 μs peak pulse power rating, 1.0 μA max reverse leakage at 17.1 V, -65 °C to +150 °C operating junction temperature range, RoHS-compliant matte tin-plated leads, and MSL Level 1 moisture sensitivity.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: when transient voltage exceeds VBR (19.0–21.0 V), it avalanches rapidly (<1 ns response) to divert surge current away from downstream circuitry. Its low incremental surge resistance ensures minimal voltage overshoot during clamping.
Thermal design relies on its RθJA = 100 °C/W (typ.) and RθJL = 20 °C/W (typ.), with derating applied above TA = 25 °C per Figure 2; mounting on 0.2" × 0.2" copper pads is required to sustain full 600 W pulse rating under repetitive 0.01% duty cycle conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 17.1 V - Maximum continuous reverse voltage before significant leakage; defines safe operating margin below clamping threshold. |
| VBR (Breakdown) | 19.0–21.0 V at 1.0 mA - Voltage at which avalanche conduction begins; tight 10% tolerance enables precise overvoltage trip setting. |
| VC (Clamping) | 27.7 V at 21.7 A - Maximum voltage seen by protected circuit during 10/1000 μs surge; critical for ensuring downstream device VDS/VCEO ratings are not exceeded. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 μs waveform; supports robust protection against IEC 61000-4-5 Level 4 surges. |
| IPPM | 21.7 A - Corresponding peak pulse current at VC; determines minimum PCB trace width and fuse coordination requirements. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance; requires ≥5.0 mm × 5.0 mm copper pad per terminal for full power rating. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive or high-ambient industrial environments. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile plastic case with matte tin-plated leads; cathode indicated by band marking; meets UL 94 V-0 flammability rating and J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to protected circuit ground or low-side reference. | Must be routed to lowest-impedance ground plane to minimize clamping loop inductance during surge events. |
| Cathode | Current exit point in forward bias; marked with band; connected to line being protected. | Band orientation identifies polarity; incorrect placement causes open-circuit failure during transient events. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables single-device protection against high-energy transients without cascaded TVS or external current limiting. |
| 27.7 V clamping voltage at 21.7 A | Provides 2.2× margin below typical 60 V automotive load-dump thresholds, preserving MOSFET gate oxide integrity. |
| 1.0 μA max reverse leakage at VWM | Minimizes standby power loss in battery-powered sensor nodes and avoids false triggering in high-impedance signal paths. |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free SMT assembly without pre-baking; eliminates moisture-related popcorning risk. |
| Glass passivated junction | Ensures stable VBR and low leakage over 15+ year field life in humid or thermally cycled environments. |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Protection |
|---|---|
Use Scenario: Protecting 12 V power rails feeding body control modules against ISO 7637-2 pulse 1 (inductive switch-off) and pulse 3a/b (load dump). IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between rail and chassis ground, clamping transients within 1 ns. Use Value: Limits rail voltage to ≤27.7 V during 100 A/50 ms pulses, preventing latch-up in microcontrollers and driver ICs. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors in PLC I/O modules from ESD and relay coil kickback. IC Role / Device Role / Timing Role: Low-capacitance TVS on 4–20 mA current loop or 0–10 V output line, referenced to local signal ground. Use Value: Maintains signal integrity with <1.0 μA leakage at 17.1 V, avoiding offset errors in 16-bit DAC outputs. |
| Consumer Power Adapter Input Stage | Telecom DC Power Feeds |
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters after rectification, guarding against transformer flyback spikes. IC Role / Device Role / Timing Role: Standoff-rated TVS across bulk capacitor terminals, absorbing energy from leakage inductance ringing. Use Value: Clamps 100 V spikes to 27.7 V with 600 W capability, eliminating need for snubber RC networks. |
Use Scenario: Protecting -48 V telecom power feeds from lightning-induced surges entering via outdoor cable plant. IC Role / Device Role / Timing Role: Primary-stage unidirectional TVS on feed line, coordinated with upstream gas discharge tube (GDT). Use Value: Provides fast-response secondary clamping (27.7 V) after GDT fires, limiting let-through voltage to telecom ASICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20A | Same VWM (17.1 V), but lower PPPM = 400 W and higher VC = 32.4 V at 12.3 A. | Limited to lower-energy transients; insufficient for IEC 61000-4-5 Level 4 or automotive load dump. | Select P6SMB20A-E3/52 when 600 W pulse handling and tighter clamping are required. |
| 1.5SMC20A | Same VWM/VBR, but larger SMC (DO-214AB) package (2.54 mm pitch vs. 2.29 mm), higher RθJA = 125 °C/W. | Requires more PCB area; less suitable for dense automotive ECUs or portable equipment. | Choose P6SMB20A-E3/52 for space-constrained designs needing SMB footprint and superior thermal performance. |
Compared with SMAJ20A and 1.5SMC20A, the P6SMB20A-E3/52 delivers 50% higher surge power rating in a smaller footprint and achieves 4.7 V lower clamping voltage - directly improving system-level immunity margin without layout or thermal redesign.
Availability
P6SMB20A-E3/52 is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interfaces, consumer power adapter input stages, and telecom DC feed protection requiring stable component supply and long-term lifecycle support.
Supply support for P6SMB20A-E3/52 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, rectifiers, and protection devices with emphasis on reliability, automotive qualification, and high-volume manufacturability.
The P6SMB Series targets cost-sensitive, high-reliability transient suppression in automotive, industrial, and telecom systems - engineered for automated SMT placement, AEC-Q101 qualification (HE3/HM3 variants), and robust surge endurance.
FAQ
What is the maximum clamping voltage of the P6SMB20A-E3/52 under standard test conditions?
The P6SMB20A-E3/52 has a maximum clamping voltage (VC) of 27.7 V at 21.7 A peak pulse current with a 10/1000 μs waveform. This value is measured per JEDEC standards and represents the highest voltage the device allows across its terminals during a defined surge event - critical for ensuring protected components remain within their absolute maximum ratings. The P6SMB20A-E3/52 maintains this clamping performance across its full operating temperature range (-65 °C to +150 °C).
Is the P6SMB20A-E3/52 RoHS-compliant and suitable for lead-free reflow?
Yes, the P6SMB20A-E3/52 carries the "E3" suffix indicating RoHS-compliance and qualification for lead-free reflow soldering up to 260 °C peak temperature (MSL Level 1 per J-STD-020). Its matte tin-plated leads meet J-STD-002 and JESD 22-B102 solderability requirements, and it passes JESD 201 Class 2 whisker testing. The P6SMB20A-E3/52 is fully compatible with standard SnAgCu reflow profiles used in high-volume SMT assembly.
How does the P6SMB20A-E3/52 differ from bidirectional variants like P6SMB20CA?
The P6SMB20A-E3/52 is unidirectional, meaning it conducts only in reverse breakdown (cathode-to-anode) and blocks forward voltage - ideal for DC rail protection where polarity is fixed. In contrast, P6SMB20CA is bidirectional and symmetrical, conducting in both directions, making it suitable for AC lines or differential signal pairs. The P6SMB20A-E3/52 offers lower leakage (<1.0 μA at 17.1 V) and tighter VBR tolerance than its bidirectional counterpart, which trades off some precision for dual-polarity capability.
What is the recommended PCB pad layout for optimal thermal and electrical performance of the P6SMB20A-E3/52?
Vishay specifies a minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad for each terminal of the P6SMB20A-E3/52 to achieve its full 600 W peak pulse rating. These pads must be connected to internal ground/power planes using multiple thermal vias (≥4 per pad, 0.3 mm diameter) to reduce RθJA. The P6SMB20A-E3/52 datasheet Figure 5 confirms that smaller pads cause immediate derating - e.g., halving pad area reduces PPPM by ~35%. Proper layout ensures reliable clamping without thermal runaway.
Can the P6SMB20A-E3/52 be used in automotive applications requiring AEC-Q101 qualification?
The base P6SMB20A-E3/52 is commercial-grade and not AEC-Q101 qualified. However, Vishay offers the automotive-qualified variant P6SMB20AHE3_B (with "HE3" and "B" suffixes), which shares identical electrical specs (VWM, VBR, VC, PPPM) but undergoes additional stress testing per AEC-Q101. For automotive designs requiring qualification, specify P6SMB20AHE3_B instead of P6SMB20A-E3/52 - the P6SMB20A-E3/52 itself remains suitable for non-automotive industrial or consumer use where qualification is not mandated.
P6SMB20A-E3/52 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-E3/52 FAQ
1.How can I place an order for P6SMB20A-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB20A-E3/52 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 P6SMB20A-E3/52 reliable?
The price and inventory of P6SMB20A-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB20A-E3/52 is usually 5 days.
3.What payment methods are accepted for P6SMB20A-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB20A-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB20A-E3/52?
P6SMB20A-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB20A-E3/52 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 P6SMB20A-E3/52?
For technical support, including P6SMB20A-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB20A-E3/52 requirements.
6.How does Aetrix verify that P6SMB20A-E3/52 is sourced from the original manufacturer or authorized distributors?
All P6SMB20A-E3/52 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 P6SMB20A-E3/52 meets industry standards.
7.What is the process for return or replacement of P6SMB20A-E3/52?
All P6SMB20A-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB20A-E3/52, 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 P6SMB20A-E3/52 part is unused and in its original packaging.
Return procedure for P6SMB20A-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB20A-E3/52 Tags
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