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Vishay General Semiconductor - Diodes Division P6SMB20A-M3/5B
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- Part No.:
- P6SMB20A-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB20A-M3/5B.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,373
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Product details
Overview
P6SMB20A-M3/5B from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 20 V standoff voltage (VWM), 27.7 V clamping voltage at 21.7 A peak pulse current, and 600 W peak pulse power capability with a 10/1000 μs waveform - deployed in automotive sensor interfaces, industrial I/O modules, and DC power rail protection.
For engineers reviewing the P6SMB20A-M3/5B datasheet, P6SMB20A-M3/5B pinout, P6SMB20A-M3/5B application, or P6SMB20A-M3/5B equivalent, key selection criteria include clamping performance under repetitive surge events, thermal resistance (RθJA = 100 °C/W), unidirectional polarity marking, and halogen-free RoHS compliance per M3 suffix.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds its breakdown threshold (19.0–21.0 V at 1 mA), it rapidly transitions to low-impedance conduction to divert transient energy away from downstream ICs or MOSFETs. Its glass-passivated junction ensures stable leakage (<1.0 μA at 17.1 V) and fast response time (<1.0 ns).
Designed for automated SMT placement in SMB (DO-214AA) package, it supports 0.01% duty-cycle repetitive surges and meets J-STD-020 MSL Level 1 (peak reflow 260 °C). The cathode band identifies polarity, and its 150 °C max junction temperature enables operation in under-hood automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 17.1 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (Breakdown) | 19.0–21.0 V at 1 mA - precise voltage threshold triggering avalanche conduction |
| VC (Clamping) | 27.7 V at 21.7 A - limits transient voltage seen by protected circuitry during 10/1000 μs surge |
| PPPM | 600 W - peak pulse power handling capacity defines surge energy absorption limit |
| IPPM | 21.7 A - maximum non-repetitive surge current the device safely clamps without failure |
| RθJA | 100 °C/W - thermal resistance determines junction temperature rise under 5.0 W steady-state dissipation |
| TJ max | 150 °C - maximum allowable junction temperature supports extended operation in high-ambient environments |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant (M3 suffix), matte tin-plated leads solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to protected line ground or low-side reference | Provides low forward voltage drop (VF = 3.5 V at 50 A) during fault conditions |
| Cathode | Current exit terminal in forward bias; marked with band; connected to protected line input | Defines unidirectional polarity - critical for correct placement on PCB to avoid reverse-bias damage |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables reliable suppression of IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 24 V systems |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes overvoltage stress on downstream 3.3 V or 5 V logic components during transients |
| MSL Level 1 moisture sensitivity | Allows direct placement without baking - reduces manufacturing overhead and avoids moisture-induced popcorning |
| 150 °C maximum junction temperature | Supports under-hood automotive deployment and high-temperature industrial control cabinets |
| Halogen-free, RoHS-compliant (M3) | Meets EU Directive 2011/65/EU and IPC-1752A material declaration requirements |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load-dump and inductive switching transients in 12 V/24 V vehicle subsystems. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between signal line and chassis ground to clamp ESD and ISO 7637-2 pulses. Use Value: Limits transient voltage to ≤27.7 V, preventing latch-up or gate oxide damage in 5 V tolerant transceivers and ADC front-ends. |
Use Scenario: Safeguarding digital input channels on programmable logic controllers exposed to relay coil flyback and motor drive noise in factory automation. IC Role / Device Role / Timing Role: Standoff-rated TVS on 24 V DC input lines, absorbing repetitive 100–500 V spikes with <1 ns response. Use Value: Maintains signal integrity across decades of operational cycles without degradation, validated per IEC 61000-4-4 (EFT) immunity testing. |
| DC Power Rail Protection | Consumer USB Port ESD Guard |
Use Scenario: Secondary overvoltage protection on 24 V DC power distribution boards upstream of DC-DC converters and microcontrollers. IC Role / Device Role / Timing Role: Clamping device placed between VIN and GND to suppress surges exceeding 17.1 V while allowing normal regulation. Use Value: Prevents catastrophic failure of buck controller ICs during hot-swap or cable discharge events, with 600 W headroom for worst-case 10/1000 μs transients. |
Use Scenario: Low-capacitance ESD guard on USB 2.0 data lines (D+/D−) in portable medical monitors and smart home hubs. IC Role / Device Role / Timing Role: Unidirectional TVS referenced to system ground, leveraging low leakage (<1 μA) to avoid signal distortion. Use Value: Passes IEC 61000-4-2 Level 4 (±15 kV air, ±8 kV contact) without affecting 480 Mbps data eye integrity. |
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), identical SMB package, but lower PPPM (400 W) and higher VC (32.4 V) | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 compliance | Select SMAJ20A only for cost-sensitive consumer designs where 600 W surge margin is not required. |
| 1.5SMC20A | Higher package thermal mass (SMC), same VWM/VC, but RθJA = 40 °C/W and 1500 W PPPM | Requires larger PCB footprint; better for high-duty-cycle industrial surge environments | Choose 1.5SMC20A when board space permits and thermal management demands >600 W sustained pulse handling. |
Compared with SMAJ20A and 1.5SMC20A, P6SMB20A-M3/5B delivers optimal balance of compact SMB footprint, 600 W surge rating, and halogen-free compliance - making it preferred for space-constrained automotive and industrial modules requiring AEC-Q101-adjacent reliability.
Availability
P6SMB20A-M3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, and DC power rail protection requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for P6SMB20A-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, precision, and automotive-grade qualification.
The P6SMB Series targets high-reliability transient suppression in harsh environments, engineered specifically for automotive, industrial, and telecom applications demanding consistent clamping performance and AEC-Q101-aligned process controls.
FAQ
What is the clamping voltage of the P6SMB20A-M3/5B under a 10/1000 μs surge?
The P6SMB20A-M3/5B clamps to a maximum of 27.7 V at 21.7 A peak pulse current under a 10/1000 μs waveform. This value is measured per standard test conditions (TA = 25 °C, mounted on 0.2" x 0.2" copper pads) and defines the upper voltage limit imposed on protected circuitry during transient events. The P6SMB20A-M3/5B maintains this clamping performance across its specified operating temperature range.
Is the P6SMB20A-M3/5B suitable for automotive applications?
Yes - while the base P6SMB20A-M3/5B is commercial-grade, it shares the same die, construction, and SMB (DO-214AA) package as AEC-Q101-qualified variants (e.g., P6SMB20AHM3_B). Its 150 °C max junction temperature, glass-passivated junction, and MSL Level 1 rating make the P6SMB20A-M3/5B widely deployed in non-safety-critical automotive subsystems such as body control modules and infotainment power rails.
How does the M3 suffix affect the P6SMB20A-M3/5B?
The M3 suffix on P6SMB20A-M3/5B indicates halogen-free, RoHS-compliant construction meeting IPC-1752A material declarations and JEDEC JESD201 Class 2 whisker resistance. It does not alter electrical parameters versus E3-suffix parts but ensures compliance with stricter environmental regulations in EU and Asia-Pacific markets. The P6SMB20A-M3/5B retains identical VWM, VBR, and PPPM ratings.
What is the maximum reverse leakage current for the P6SMB20A-M3/5B at rated standoff voltage?
The P6SMB20A-M3/5B 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 minimal power loss in always-on circuits and prevents false triggering in high-impedance sensor interfaces. Leakage remains below 5.0 μA up to 125 °C per derating curves in the Vishay datasheet.
Can the P6SMB20A-M3/5B be used in bidirectional configurations?
No - the P6SMB20A-M3/5B is strictly unidirectional, identified by the cathode band marking. For bidirectional protection, Vishay specifies part numbers ending in "C" (e.g., P6SMB20CA). Using the P6SMB20A-M3/5B in reverse-biased configurations risks permanent breakdown, as its forward characteristics are not rated for sustained reverse conduction. Always verify polarity during PCB layout.
P6SMB20A-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:
- 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 (SMBJ)
P6SMB20A-M3/5B FAQ
1.How can I place an order for P6SMB20A-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB20A-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 P6SMB20A-M3/5B reliable?
The price and inventory of P6SMB20A-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 P6SMB20A-M3/5B is usually 5 days.
3.What payment methods are accepted for P6SMB20A-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB20A-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB20A-M3/5B?
P6SMB20A-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB20A-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 P6SMB20A-M3/5B?
For technical support, including P6SMB20A-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB20A-M3/5B requirements.
6.How does Aetrix verify that P6SMB20A-M3/5B is sourced from the original manufacturer or authorized distributors?
All P6SMB20A-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 P6SMB20A-M3/5B meets industry standards.
7.What is the process for return or replacement of P6SMB20A-M3/5B?
All P6SMB20A-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB20A-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 P6SMB20A-M3/5B part is unused and in its original packaging.
Return procedure for P6SMB20A-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB20A-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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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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