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Vishay General Semiconductor - Diodes Division P6SMB51A-M3/52
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- Part No.:
- P6SMB51A-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB51A-M3/52.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,446
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Product details
Overview
P6SMB51A-M3/52 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, rated for 51 V breakdown voltage (VBR = 48.5–53.6 V at IT = 1.0 mA), 70.1 V maximum clamping voltage (VC) at 8.6 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 μs waveform). It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients in industrial and automotive electronics.
For engineers reviewing the P6SMB51A-M3/52 datasheet, P6SMB51A-M3/52 pinout, P6SMB51A-M3/52 application, or P6SMB51A-M3/52 equivalent, key selection criteria include unidirectional polarity, 43.6 V stand-off voltage (VWM), 1.0 μA max reverse leakage at VWM, halogen-free RoHS compliance (M3 suffix), and AEC-Q101 qualification availability via HM3 variants.
Technical Context
This TVS diode operates as a clamping device that enters avalanche conduction when transient voltage exceeds its breakdown threshold, limiting downstream circuit voltage to ≤70.1 V under 8.6 A surge. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance.
Designed for automated SMT placement on standard PCB pads (0.2" × 0.2" copper), it delivers fast response time (<1 ns), meets MSL Level 1 per J-STD-020, and sustains 100 A non-repetitive forward surge (8.3 ms half-sine) - critical for protecting power-stage components during load dump events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 48.5 V / 53.6 V at 1.0 mA test current - defines precise avalanche onset range for reliable overvoltage triggering |
| VWM | 43.6 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 μA |
| VC @ IPPM | 70.1 V at 8.6 A - clamped voltage seen by protected circuit during worst-case 600 W transient |
| PPPM | 600 W (10/1000 μs waveform) - peak surge energy handling capacity under standardized lightning/inductive spike profile |
| IFSM | 100 A (8.3 ms half-sine) - surge current rating for load-dump protection in 12 V automotive systems |
| Junction Temp | -65 °C to +150 °C - enables operation in under-hood and industrial control environments |
| Package | SMB (DO-214AA) - industry-standard surface-mount outline with 2.2 mm height and 3.94 mm length for high-density layouts |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, unidirectional configuration with cathode band marking. Dimensions: 3.94 mm × 2.20 mm × 1.52 mm (L × W × H); matte tin-plated leads, solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to system ground or low-side reference | Provides low-impedance path to ground during transient clamping; must be routed with minimal inductance |
| Cathode | Current exit terminal in forward bias; marked with band; connects to protected line | Receives transient energy from signal/power rail; polarity-critical - reversal prevents clamping function |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables robust protection against IEC 61000-4-5 Level 4 surges without derating in standard PCB layouts |
| Glass passivated junction | Ensures long-term VBR stability and low leakage drift across temperature and lifetime |
| MSL Level 1 (260 °C peak) | Supports lead-free reflow without preconditioning; compatible with standard SMT assembly lines |
| Halogen-free & RoHS-compliant (M3) | Fulfills environmental compliance requirements for industrial and automotive OEM programs |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage stress on downstream ICs compared to higher-ratio TVS devices |
Applications
| Automotive Load Dump Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: 12 V vehicle electrical system subjected to ISO 7637-2 load dump transients up to 120 V. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC converter input. Use Value: Clamps transient to 70.1 V within nanoseconds, preventing damage to 40 V-rated input stages of buck controllers. |
Use Scenario: Analog output line (e.g., 4–20 mA current loop) exposed to ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: TVS mounted directly at connector interface, shunting surge energy to ground. Use Value: Limits induced voltage to <70.1 V, preserving accuracy of 16-bit ADCs and avoiding latch-up in analog front-end op-amps. |
| Power Supply Input Stage Protection | Motor Drive Gate Driver Protection |
Use Scenario: AC/DC adapter secondary-side output feeding microcontroller and peripherals. IC Role / Device Role / Timing Role: TVS installed across +VOUT and GND, upstream of LDO regulator. Use Value: Absorbs 600 W surges from line transients while maintaining VWM margin above nominal 5 V or 3.3 V rails. |
Use Scenario: High-side gate driver IC controlling N-channel MOSFET in BLDC inverter stage. IC Role / Device Role / Timing Role: TVS placed between gate driver output and MOSFET gate, referenced to source. Use Value: Suppresses Miller-induced voltage spikes during fast switching, preventing false turn-on and gate oxide overstress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ51A-E3/52 | Same VBR range (48.5–53.6 V), but lower PPPM = 400 W; SMA package (smaller footprint, higher RθJA = 140 °C/W) | Limited to lower-energy transients; unsuitable for ISO 7637-2 load dump where 600 W is required | Select only if board space is constrained and surge energy is confirmed ≤400 W |
| 1.5SMC51A | Same electrical specs, but larger SMC (DO-214AB) package (7.11 mm × 6.22 mm); RθJA = 60 °C/W improves thermal margin | Better thermal performance for high-duty-cycle or ambient >85 °C environments; requires more PCB area | Prefer for industrial motor drives with repetitive surge exposure or elevated ambient temperatures |
Compared with SMAJ51A-E3/52 and 1.5SMC51A, P6SMB51A-M3/52 delivers optimal balance of 600 W surge capability, SMB footprint compatibility, and halogen-free compliance - making it ideal for space-constrained automotive and industrial designs requiring certified reliability without layout redesign.
Availability
P6SMB51A-M3/52 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and power supply input protection requiring stable component supply and halogen-free compliance.
Supply support for P6SMB51A-M3/52 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, efficiency, and application-specific optimization.
The P6SMB Series targets high-energy transient suppression in automotive, industrial, and telecom systems, designed to meet stringent AEC-Q101, IEC 61000-4-5, and UL 94 V-0 requirements without sacrificing SMT manufacturability.
FAQ
What is the maximum clamping voltage of P6SMB51A-M3/52 under peak pulse conditions?
The P6SMB51A-M3/52 has a maximum clamping voltage (VC) of 70.1 V at 8.6 A peak pulse current (IPPM) using a 10/1000 μs waveform. This value is measured per JEDEC standards and represents the highest voltage imposed on the protected circuit during a full 600 W transient event. Designers must ensure downstream components have sufficient voltage margin above this clamping level.
Is P6SMB51A-M3/52 suitable for automotive applications requiring AEC-Q101 qualification?
The base P6SMB51A-M3/52 is not AEC-Q101 qualified; however, Vishay offers the HM3 variant (e.g., P6SMB51AHM3_B/H) which carries full AEC-Q101 qualification for automotive use. The M3 suffix indicates halogen-free RoHS compliance but does not imply automotive qualification - always verify the full part number suffix against Vishay's automotive ordering matrix before deployment in vehicle systems.
How does the SMB package of P6SMB51A-M3/52 compare thermally to larger packages like SMC?
P6SMB51A-M3/52 in SMB (DO-214AA) has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W, versus ~60 °C/W for the SMC-packaged 1.5SMC51A. This means the P6SMB51A-M3/52 requires more careful thermal pad design - minimum 0.2" × 0.2" copper per terminal - to sustain repetitive surges or high ambient temperatures (>85 °C). For single-event protection, SMB is sufficient; for high-duty-cycle use, SMC offers superior thermal headroom.
What is the reverse leakage current specification for P6SMB51A-M3/52 at its stand-off voltage?
At its rated stand-off voltage (VWM) of 43.6 V, the P6SMB51A-M3/52 exhibits a maximum reverse leakage current (ID) of 1.0 μA at TA = 25 °C. This low leakage ensures minimal power loss in standby mode and avoids false triggering in high-impedance sensing circuits. Leakage increases with temperature but remains below 10 μA up to 125 °C per Vishay characterization data.
Can P6SMB51A-M3/52 be used in bidirectional configurations?
No - P6SMB51A-M3/52 is strictly unidirectional, indicated by the "A" suffix and cathode band marking. For bidirectional transient suppression, Vishay specifies the "CA" suffix (e.g., P6SMB51CA-M3/52), which features symmetrical breakdown in both polarities. Using P6SMB51A-M3/52 in reverse-biased AC applications will result in forward conduction and failure; always match suffix to system polarity requirements.
P6SMB51A-M3/52 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-M3/52 FAQ
1.How can I place an order for P6SMB51A-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB51A-M3/52 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 P6SMB51A-M3/52 reliable?
The price and inventory of P6SMB51A-M3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB51A-M3/52 is usually 5 days.
3.What payment methods are accepted for P6SMB51A-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB51A-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB51A-M3/52?
P6SMB51A-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB51A-M3/52 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 P6SMB51A-M3/52?
For technical support, including P6SMB51A-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB51A-M3/52 requirements.
6.How does Aetrix verify that P6SMB51A-M3/52 is sourced from the original manufacturer or authorized distributors?
All P6SMB51A-M3/52 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 P6SMB51A-M3/52 meets industry standards.
7.What is the process for return or replacement of P6SMB51A-M3/52?
All P6SMB51A-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB51A-M3/52, 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 P6SMB51A-M3/52 part is unused and in its original packaging.
Return procedure for P6SMB51A-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB51A-M3/52 Tags
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