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Vishay General Semiconductor - Diodes Division P6SMB51A-M3/5B
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- Part No.:
- P6SMB51A-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB51A-M3/5B.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,430
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Product details
Overview
P6SMB51A-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 43.6 V standoff voltage (VWM), 48.5–53.6 V breakdown voltage (VBR) at 1 mA, 70.1 V maximum clamping voltage (VC) at 8.6 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform - deployed in automotive sensor interfaces, industrial I/O modules, and DC power rail protection.
For engineers reviewing the P6SMB51A-M3/5B datasheet, P6SMB51A-M3/5B pinout, P6SMB51A-M3/5B application, or P6SMB51A-M3/5B equivalent, this page delivers verified electrical parameters, SMB (DO-214AA) package details, clamping behavior under surge conditions, thermal derating curves, and AEC-Q101-qualified alternatives for automotive-grade design-in.
Technical Context
This unidirectional TVS operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR, it avalanches to divert transient energy away from downstream circuitry. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 μA at VWM), while M3 suffix confirms halogen-free, RoHS-compliant construction meeting JESD201 Class 2 whisker resistance.
Thermal performance is defined by RθJA = 100 °C/W (typ.) and RθJL = 20 °C/W (typ.), enabling reliable operation up to TJ = 150 °C. The device sustains 100 A non-repetitive forward surge (8.3 ms half-sine) and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak temperature tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Standoff) | 43.6 V - Maximum continuous reverse operating voltage before significant leakage; sets upper limit for normal circuit operation. |
| VBR (Breakdown) | 48.5–53.6 V at 1 mA - Confirmed avalanche initiation range; defines precise clamping onset threshold. |
| VC (Clamping) | 70.1 V at 8.6 A (10/1000 μs) - Peak voltage seen by protected circuit during worst-case surge; critical for IC survivability. |
| PPPM | 600 W - Surge energy-handling capacity under standardized 10/1000 μs waveform; validates protection against IEC 61000-4-5 Level 4 transients. |
| IPPM | 8.6 A - Peak pulse current corresponding to VC; used to size PCB trace width and verify layout robustness. |
| TJ max. | 150 °C - Maximum junction temperature; determines thermal margin in enclosed or high-ambient environments. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 5.59 mm × 4.06 mm footprint; compatible with automated pick-and-place. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; cathode indicated by band marking on unidirectional devices; meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line; conducts during forward surge events (e.g., reverse polarity misconnection). |
| Cathode | Avalanche clamping terminal | Connected to higher-potential side; initiates controlled breakdown when reverse voltage exceeds VBR, shunting surge current to ground. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Validated clamping performance under IEC 61000-4-5 surge test conditions without degradation. |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage (<1.0 μA) across temperature and lifetime. |
| MSL Level 1 moisture sensitivity | Enables standard SMT reflow without baking; supports direct placement after dry pack opening. |
| AEC-Q101 qualification option | Available with HM3 suffix (e.g., P6SMB51AHM3_B); certified for automotive under-hood and body electronics. |
| Halogen-free & RoHS-compliant (M3) | Meets environmental compliance requirements for industrial and consumer end equipment. |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt clamping element placed between signal line and ground, activated within <1 ns of overvoltage event. Use Value: Limits transient voltage to ≤70.1 V, preventing damage to 5 V or 3.3 V interface ICs while maintaining signal integrity during normal operation. |
Use Scenario: Safeguarding 24 V DC digital input channels in programmable logic controllers against field-wiring surges and inductive kickback. IC Role / Device Role / Timing Role: Primary overvoltage clamp on input node, coordinated with series current-limiting resistor and optocoupler isolation. Use Value: Absorbs 600 W surge energy without failure, enabling >100,000 surge cycles per IEC 61000-4-5, reducing field return rates. |
| DC Power Rail Protection (12–48 V) | Telecom Line Card Surge Suppression |
Use Scenario: Secondary protection on intermediate DC rails (e.g., 24 V, 48 V) feeding motor drivers, PoE injectors, or embedded controllers. IC Role / Device Role / Timing Role: Fast-acting parallel suppressor downstream of primary fuse or polyfuse, clamping residual spikes after upstream filtering. Use Value: Clamps to 70.1 V within nanoseconds, preventing latch-up or gate oxide rupture in MOSFETs and PMICs operating near their absolute maximum ratings. |
Use Scenario: Front-end transient suppression on Ethernet PHY power and data lines in enterprise switches and base station line cards. IC Role / Device Role / Timing Role: First-line defense against lightning-induced surges entering via RJ45 connectors or external power feeds. Use Value: Withstands repetitive 10/1000 μs surges up to 600 W, maintaining <1.0 μA leakage at 43.6 V to avoid signal attenuation on high-speed links. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ51A | Same VWM (43.6 V), identical SMB package, but lower PPPM = 400 W and higher VC = 81.5 V at same IPPM. | Limited to less severe surge environments (e.g., IEC 61000-4-5 Level 2); not recommended for automotive load-dump scenarios. | Select SMAJ51A only when cost sensitivity outweighs surge margin requirements and thermal derating allows. |
| P6SMB51AHM3_B | Identical electrical specs and SMB package; differs only in AEC-Q101 qualification, HM3 halogen-free marking, and B revision code. | Required for automotive OEM designs needing PPAP documentation and extended temperature validation (-40 °C to +125 °C). | Choose P6SMB51AHM3_B when qualifying for automotive Tier-1 supply chains or safety-critical subsystems. |
Compared with SMAJ51A, P6SMB51A-M3/5B delivers 50 % higher surge power handling and tighter clamping, making it suitable for harsher transients; versus P6SMB51AHM3_B, it lacks formal AEC-Q101 certification but shares identical electrical and mechanical behavior for commercial/industrial use.
Availability
P6SMB51A-M3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC inputs, and 24–48 V DC power rail protection requiring stable component supply, consistent M3 halogen-free compliance, and full traceability through 13" tape-and-reel delivery (3200 units/reel).
Supply support for P6SMB51A-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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P6SMB Series targets high-energy transient suppression in space-constrained SMT designs, balancing 600 W surge capability with low-profile SMB packaging for automotive, industrial, and telecom infrastructure applications.
FAQ
What is the maximum clamping voltage of the P6SMB51A-M3/5B under a 10/1000 μs surge?
The P6SMB51A-M3/5B clamps to a maximum of 70.1 V when subjected to an 8.6 A peak pulse current with a 10/1000 μs waveform. This value is measured per standard test conditions (TA = 25 °C, mounted on 0.2" × 0.2" copper pads) and defines the highest voltage stress imposed on protected circuitry during surge events. Engineers must verify that downstream components tolerate this clamped voltage with appropriate margin.
Is the P6SMB51A-M3/5B suitable for automotive applications?
The P6SMB51A-M3/5B itself is commercial-grade and not AEC-Q101 qualified; however, its pin-compatible variant P6SMB51AHM3_B is fully AEC-Q101 qualified and shares identical electrical and thermal specifications. For automotive use, designers should specify the HM3_B version to meet OEM qualification requirements while retaining the same PCB layout and protection performance as the P6SMB51A-M3/5B.
What does the "M3" suffix indicate in P6SMB51A-M3/5B?
The "M3" suffix in P6SMB51A-M3/5B denotes halogen-free, RoHS-compliant construction with matte tin-plated leads that meet JESD201 Class 2 whisker resistance. It also confirms compliance with Vishay's material categorization standards (www.vishay.com/doc?99912) and qualifies the device for lead-free reflow soldering up to 260 °C peak temperature per J-STD-020 MSL Level 1.
How does the P6SMB51A-M3/5B compare to the SMAJ51A in terms of surge handling?
The P6SMB51A-M3/5B provides 600 W peak pulse power, whereas the SMAJ51A is rated for only 400 W under identical 10/1000 μs conditions. Additionally, the P6SMB51A-M3/5B achieves lower clamping voltage (70.1 V vs. 81.5 V at comparable current), resulting in superior protection margin for sensitive 3.3 V or 5 V ICs. Both use SMB packages, but P6SMB51A-M3/5B offers higher reliability in demanding surge environments.
What is the thermal resistance from junction to ambient for the P6SMB51A-M3/5B?
The P6SMB51A-M3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on standard 0.2" × 0.2" copper pads per JEDEC standards. This value enables accurate junction temperature estimation under steady-state power dissipation (e.g., 5.0 W max at TA = 50 °C) and informs layout decisions such as pad size, copper pour area, and airflow requirements in thermally constrained enclosures.
P6SMB51A-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):
- 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 (SMBJ)
P6SMB51A-M3/5B FAQ
1.How can I place an order for P6SMB51A-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB51A-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 P6SMB51A-M3/5B reliable?
The price and inventory of P6SMB51A-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 P6SMB51A-M3/5B is usually 5 days.
3.What payment methods are accepted for P6SMB51A-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB51A-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB51A-M3/5B?
P6SMB51A-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB51A-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 P6SMB51A-M3/5B?
For technical support, including P6SMB51A-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB51A-M3/5B requirements.
6.How does Aetrix verify that P6SMB51A-M3/5B is sourced from the original manufacturer or authorized distributors?
All P6SMB51A-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 P6SMB51A-M3/5B meets industry standards.
7.What is the process for return or replacement of P6SMB51A-M3/5B?
All P6SMB51A-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB51A-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 P6SMB51A-M3/5B part is unused and in its original packaging.
Return procedure for P6SMB51A-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB51A-M3/5B Tags
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