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Vishay General Semiconductor - Diodes Division P6SMB51A-E3/5B
- Part No.:
- P6SMB51A-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB51A-E3/5B.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,570
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Product details
Overview
P6SMB51A-E3/5B from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the P6SMB series, designed for clamping voltage transients on power and signal lines. It features a 51 V breakdown voltage (VBR = 48.5–53.6 V at 1 mA), 70.1 V maximum clamping voltage (VC) at 8.6 A peak pulse current, and 600 W peak pulse power capability with a 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the P6SMB51A-E3/5B datasheet, P6SMB51A-E3/5B pinout, P6SMB51A-E3/5B application, or P6SMB51A-E3/5B equivalent, key selection criteria include standoff voltage (43.6 V), low clamping ratio (1.37× VWM), unidirectional polarity with cathode band marking, and SMB (DO-214AA) package compatibility with automated SMT assembly.
Technical Context
This TVS diode operates as a voltage-clamping protection device, triggered when reverse voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable avalanche characteristics, and it delivers sub-nanosecond response time to transient events such as ESD, inductive switching spikes, and lightning surges.
The device is rated for 150 °C maximum junction temperature and exhibits a temperature coefficient of VBR of +0.102 %/°C. Its thermal resistance (junction-to-ambient) is 100 °C/W on standard 0.2" × 0.2" copper pads, supporting reliable operation under repetitive surge conditions at ≤0.01% duty cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 48.5–53.6 V at 1 mA test current - defines precise avalanche initiation point for predictable clamping onset |
| Standoff Voltage VWM | 43.6 V maximum - ensures no conduction during normal 51 V nominal rail operation |
| Clamping Voltage VC | 70.1 V at 8.6 A IPPM - limits downstream voltage stress to safe levels during 600 W transient events |
| Peak Pulse Power PPPM | 600 W with 10/1000 µs waveform - supports robust protection against IEC 61000-4-5 Level 3/4 surges |
| Maximum Leakage ID | 1.0 µA at VWM - minimizes standby power loss and avoids false triggering in high-impedance circuits |
| Package | SMB (DO-214AA) - industry-standard surface-mount outline enabling automated placement and 2.2 mm × 3.9 mm board footprint |
| Junction Temperature Range | −65 °C to +150 °C - suitable for under-hood automotive, industrial control, and outdoor telecom environments |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; cathode indicated by a band on the body end. Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal per JEDEC standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference node | Connected to system ground or lower-potential rail; defines polarity for unidirectional clamping |
| Cathode | Avalanche conduction terminal / Clamping output node | Connected to protected line (e.g., 48 V supply rail); conducts surge current to ground when VREV > VBR |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power rating | Enables single-device protection against high-energy transients without external current sharing |
| Glass passivated junction | Ensures stable, repeatable avalanche performance over temperature and lifetime with low parameter drift |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and reflow compatibility up to 260 °C peak without baking preconditioning |
| RoHS-compliant, halogen-free option available | Meets environmental compliance requirements for consumer, industrial, and automotive electronics |
| AEC-Q101 qualification option | Validated reliability for automotive applications including engine control units and ADAS power domains |
Applications
| Industrial Power Supply Protection | Automotive Sensor Interface Protection |
|---|---|
Use Scenario: 48 V DC input stage of programmable logic controller (PLC) power module exposed to load dump and relay coil flyback. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between input rail and ground to limit transient overvoltage. Use Value: Clamps 70.1 V max during 8.6 A surge, preventing damage to downstream DC-DC controllers and monitoring ICs operating at 45–55 V range. |
Use Scenario: CAN FD signal line (CANH/CANL) in vehicle body control module subjected to ISO 7637-2 pulse 1 and pulse 2a. IC Role / Device Role / Timing Role: Standby protection element shunting induced transients before they reach the CAN transceiver's input pins. Use Value: Sub-ns response and 1.0 µA leakage preserve signal integrity and bus quiescent current budget while meeting automotive EMC immunity targets. |
| Telecom DC Feeder Protection | Consumer USB-C Power Delivery Line |
Use Scenario: −48 V telecom central office feeder line encountering lightning-induced surges on long-distance copper pairs. IC Role / Device Role / Timing Role: Primary overvoltage clamp on the DC input side of remote radio unit (RRU) power conditioning stage. Use Value: 600 W rating and 150 °C TJ rating support sustained operation in outdoor cabinets with minimal derating up to 85 °C ambient. |
Use Scenario: VBUS line in USB-C port of portable monitor handling up to 20 V/5 A PD profile with hot-plug ESD risk. IC Role / Device Role / Timing Role: Secondary-level transient suppressor downstream of primary fuse and upstream of USB PD controller. Use Value: 43.6 V VWM allows safe operation across full USB PD 3.0 range (5–20 V), while 70.1 V VC protects 24 V tolerant PD ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ51A | Same 51 V VBR range but lower 400 W PPPM rating and higher 73.5 V VC at 5.5 A | Limited to lower-energy transients; not suitable for IEC 61000-4-5 Level 4 | Select SMAJ51A only where space constraints require SMA package and surge energy is <400 W |
| 1.5SMC51A | Identical electrical specs but larger SMC (DO-214AB) package (7.1 mm × 6.2 mm vs. 4.6 mm × 3.9 mm) | Requires PCB redesign; better thermal dissipation for continuous surge duty | Choose 1.5SMC51A when board layout allows larger footprint and thermal management prioritizes junction temperature stability |
Compared with SMAJ51A and 1.5SMC51A, the P6SMB51A-E3/5B delivers optimal balance of compact SMB footprint, 600 W surge capacity, and low clamping voltage - making it preferred for space-constrained industrial and automotive modules requiring certified high-energy transient immunity.
Availability
P6SMB51A-E3/5B is available at Aetrix Electronics and suitable for industrial power supplies, automotive sensor interfaces, telecom DC feeders, and USB-C power delivery systems requiring stable component supply with RoHS-compliant, commercial-grade traceability.
Supply support for P6SMB51A-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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific validation.
The P6SMB Series is engineered for high-reliability transient suppression in harsh environments - targeting industrial automation, automotive electronics, and infrastructure equipment where robustness against ESD, EFT, and surge events is critical.
FAQ
What is the maximum clamping voltage of the P6SMB51A-E3/5B under specified test conditions?
The P6SMB51A-E3/5B has a maximum clamping voltage (VC) of 70.1 V when subjected to its rated peak pulse current of 8.6 A using a 10/1000 µs waveform. This value is measured at TA = 25 °C and confirms the device's ability to limit transient overvoltage to a predictable, safe level for downstream components. The P6SMB51A-E3/5B maintains this clamping performance across its operational temperature range with minimal drift due to its +0.102 %/°C VBR coefficient.
Is the P6SMB51A-E3/5B suitable for automotive applications?
The base P6SMB51A-E3/5B is RoHS-compliant and qualified for commercial use; however, the AEC-Q101 qualified variant is designated as P6SMB51AHE3_B or P6SMB51AHM3_B (with suffix _B indicating automotive qualification). While the P6SMB51A-E3/5B shares identical electrical characteristics, only the HE3_B/HM3_B versions undergo extended reliability testing per AEC-Q101. For automotive designs requiring qualification evidence, specify the automotive-grade suffix - the P6SMB51A-E3/5B itself is not AEC-Q101 certified.
What does the "E3/5B" suffix indicate in P6SMB51A-E3/5B?
The "E3" denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads, while "5B" specifies packaging in a 13-inch diameter plastic tape-and-reel format containing 3200 units. This differs from "52", which indicates a 7-inch reel with 750 units. The P6SMB51A-E3/5B is optimized for high-volume SMT assembly lines requiring large reels to minimize changeover frequency - all electrical and thermal specifications remain identical to other P6SMB51A variants.
How does the P6SMB51A-E3/5B compare to bidirectional TVS diodes like P6SMB51CA?
The P6SMB51A-E3/5B is unidirectional and features a cathode band for polarity identification, whereas P6SMB51CA is bidirectional with no polarity marking and symmetrical clamping in both directions. The P6SMB51A-E3/5B offers lower leakage (1.0 µA vs. 10 µA for P6SMB51CA at VWM) and is intended for DC rail protection where polarity is fixed. Use P6SMB51A-E3/5B on positive rails referenced to ground; select P6SMB51CA only for AC-coupled or floating signal lines requiring dual-polarity suppression.
What is the thermal resistance and recommended pad layout for the P6SMB51A-E3/5B?
The P6SMB51A-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This layout meets JEDEC standards and ensures adequate heat dissipation during repetitive surge events. Reducing pad size increases RθJA, potentially causing premature thermal shutdown or degradation - always follow the SMB (DO-214AA) mounting footprint shown in Vishay document 88370, page 5, for reliable operation at full 600 W rating.
P6SMB51A-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):
- 43.6V
- Voltage - Breakdown (Min):
- 48.5V
- Voltage - Clamping (Max) @ Ipp:
- 70.1V
- Current - Peak Pulse (10/1000µs):
- 8.6A
- 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)
P6SMB51A-E3/5B FAQ
1.How can I place an order for P6SMB51A-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB51A-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 P6SMB51A-E3/5B reliable?
The price and inventory of P6SMB51A-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 P6SMB51A-E3/5B is usually 5 days.
3.What payment methods are accepted for P6SMB51A-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB51A-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB51A-E3/5B?
P6SMB51A-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB51A-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 P6SMB51A-E3/5B?
For technical support, including P6SMB51A-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB51A-E3/5B requirements.
6.How does Aetrix verify that P6SMB51A-E3/5B is sourced from the original manufacturer or authorized distributors?
All P6SMB51A-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 P6SMB51A-E3/5B meets industry standards.
7.What is the process for return or replacement of P6SMB51A-E3/5B?
All P6SMB51A-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB51A-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 P6SMB51A-E3/5B part is unused and in its original packaging.
Return procedure for P6SMB51A-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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