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Vishay General Semiconductor - Diodes Division P6SMB51AHE3/5B
- Part No.:
- P6SMB51AHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB51AHE3/5B.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,368
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Product details
Overview
P6SMB51AHE3/5B 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, and 600 W peak pulse power with 10/1000 μs waveform - deployed for overvoltage protection of MOSFETs, ICs, and sensor signal lines in industrial and automotive electronics.
For engineers reviewing the P6SMB51AHE3/5B datasheet, P6SMB51AHE3/5B pinout, P6SMB51AHE3/5B application, or P6SMB51AHE3/5B equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), polarity marking (cathode band), and RoHS-compliant packaging configuration for rapid ESD/surge design validation.
Technical Context
The P6SMB51AHE3/5B operates as a unidirectional avalanche diode with glass-passivated junction, enabling fast response to transient events (<1 ns) and low incremental surge resistance. Its 51 V nominal breakdown voltage targets 48 V rail protection, while clamping at ≤70.1 V ensures safe voltage limiting during 8.6 A surges.
Designed for surface-mount assembly on 0.2" × 0.2" copper pads, it supports repetitive 0.01% duty cycle pulses and meets MSL Level 1 (260 °C reflow peak). The HE3 suffix confirms AEC-Q101 qualification and RoHS compliance, making it suitable for automotive ECUs and industrial control modules requiring long-term reliability under thermal cycling.
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 initiation window for predictable clamping onset |
| VWM | 43.6 V - maximum continuous reverse operating voltage; ensures no conduction below system's 48 V nominal rail |
| VC @ IPPM | 70.1 V at 8.6 A - limits transient voltage across protected circuitry to safe margin below IC absolute max ratings |
| PPPM | 600 W with 10/1000 μs waveform - sustains high-energy lightning-induced or inductive-switching transients |
| IFSM | 100 A (8.3 ms half-sine) - withstands single-event surge without bond wire failure or junction meltdown |
| RθJA | 100 °C/W - enables thermal design on standard PCB copper; derating required above 25 °C ambient |
| Junction Temp | -65 °C to +150 °C - supports operation in under-hood automotive and industrial environments |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, matte tin-plated leads, 0.220" × 0.130" footprint, MSL Level 1 compliant, UL 94 V-0 molding compound. Cathode identified by black band at one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to system ground or lower-potential node | Provides low-forward-voltage path during surge conduction; must be routed with low-inductance trace to ground plane |
| Cathode | Current exit terminal in forward bias; marked with black band; connected to protected line | Defines polarity-sensitive placement - reversal causes catastrophic failure during normal operation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance per JESD22-A108 |
| Glass-passivated junction | Eliminates moisture ingress and surface leakage paths, ensuring stable VBR over 15+ year field life |
| 600 W peak pulse power | Handles IEC 61000-4-5 Level 4 (4 kV surge) without degradation when mounted per recommended pad layout |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes let-through energy to downstream components - critical for protecting 5 V or 3.3 V logic interfaces |
| MSL Level 1 (260 °C) | Compatible with standard lead-free reflow profiles without preconditioning or baking requirements |
Applications
| Automotive Body Control Module | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protects LIN bus transceiver inputs against load-dump and alternator ripple transients in vehicle door modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between LIN line and ground, clamping spikes before they reach transceiver ESD structures. Use Value: Prevents latch-up or permanent damage to TJA1020-level transceivers during 12 V system surges up to ±100 V. |
Use Scenario: Shields 24 V digital input channels of programmable logic controllers from inductive kickback of solenoid valves. IC Role / Device Role / Timing Role: Primary overvoltage clamp on field-side input traces, coordinated with series current-limiting resistor. Use Value: Limits transient voltage to <70.1 V, keeping input stage within safe operating area of optocoupler input diodes. |
| Telecom Power Supply Rail | Consumer Appliance Motor Driver |
Use Scenario: Safeguards secondary-side 48 V DC-DC converter outputs against backfeed transients from PoE-powered equipment. IC Role / Device Role / Timing Role: Output rail protector located immediately after DC-DC inductor, before point-of-load regulators. Use Value: Clamps 10/1000 μs surges to ≤70.1 V, preventing overvoltage shutdown or capacitor rupture in downstream 5 V/3.3 V rails. |
Use Scenario: Guards gate driver IC supply pins against Miller-induced voltage spikes during BLDC motor commutation. IC Role / Device Role / Timing Role: Local rail clamp adjacent to high-side gate driver VDD, minimizing loop inductance. Use Value: Suppresses >100 V transients within nanoseconds, avoiding false triggering or oxide breakdown in 650 V GaN drivers. |
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-E3/5B | Same SMB package, identical VBR (48.5–53.6 V), but rated for 400 W PPPM and not AEC-Q101 qualified | Limited to commercial-grade consumer or non-safety-critical industrial use | Select when cost sensitivity outweighs automotive qualification or 600 W surge margin |
| 1.5SMC51A | Same electrical specs, but in larger SMC (DO-214AB) package - 1.5× footprint area, RθJA = 40 °C/W | Better thermal performance but incompatible with space-constrained SMB layouts | Choose only if board real estate allows larger footprint and higher power dissipation is needed |
Compared with SMAJ51A-E3/5B and 1.5SMC51A, the P6SMB51AHE3/5B uniquely combines AEC-Q101 qualification, 600 W surge rating, and compact SMB footprint - making it the optimal choice for automotive and high-density industrial designs where reliability and space efficiency are jointly constrained.
Availability
P6SMB51AHE3/5B is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, telecom power supplies, and consumer appliance motor controls requiring stable component supply with full traceability and long-lifecycle support.
Supply support for P6SMB51AHE3/5B 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, ruggedness, and application-specific qualification.
The P6SMB Series targets high-reliability transient suppression in automotive, industrial, and telecom systems - engineered for robust surge handling, tight parameter distribution, and seamless integration into automated SMT lines.
FAQ
What is the clamping voltage of the P6SMB51AHE3/5B at its rated peak pulse current?
The P6SMB51AHE3/5B has a maximum clamping voltage (VC) of 70.1 V at its specified peak pulse current (IPPM) of 8.6 A, measured using the standard 10/1000 μs double-exponential waveform. This value is guaranteed across the full operating temperature range and ensures protected circuits remain within safe voltage margins during surge events. The P6SMB51AHE3/5B achieves this with low dynamic impedance, critical for fast-rising transients.
Is the P6SMB51AHE3/5B suitable for automotive applications?
Yes, the P6SMB51AHE3/5B is AEC-Q101 qualified, as confirmed by the "HE3" suffix and Vishay documentation. It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias, and surge endurance - making it approved for use in automotive body control units, infotainment power rails, and sensor interface protection. The P6SMB51AHE3/5B also meets MSL Level 1 for lead-free reflow compatibility.
How does the P6SMB51AHE3/5B differ from the bidirectional P6SMB51CAHE3/5B?
The P6SMB51AHE3/5B is unidirectional and features a cathode band for polarity-sensitive placement, while the P6SMB51CAHE3/5B is bidirectional with no polarity marking and symmetric clamping in both directions. The P6SMB51AHE3/5B is used where DC bias exists (e.g., 48 V supply lines), whereas the CA version suits AC-coupled or floating signal lines like USB or CAN. Their VBR, VC, and PPPM values differ slightly due to internal structure.
What is the maximum steady-state power dissipation of the P6SMB51AHE3/5B?
The P6SMB51AHE3/5B has a maximum steady-state power dissipation (PD) of 5.0 W at 50 °C ambient temperature on an infinite heatsink. In typical PCB mounting (0.2" × 0.2" copper pads), derating applies - e.g., ~3.5 W at 70 °C ambient. This rating governs continuous leakage current handling and thermal management in high-humidity or high-temperature environments where the P6SMB51AHE3/5B may experience elevated reverse bias.
Does the P6SMB51AHE3/5B require special PCB layout considerations?
Yes - Vishay specifies minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for optimal thermal and surge performance. Short, wide traces to ground minimize inductance and preserve clamping speed. The P6SMB51AHE3/5B must be placed as close as possible to the protected node, with the cathode connected directly to the vulnerable line and anode to low-impedance ground. Avoid vias in the TVS return path to maintain sub-nanosecond response.
P6SMB51AHE3/5B 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:
- Discontinued at Digi-Key
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
P6SMB51AHE3/5B FAQ
1.How can I place an order for P6SMB51AHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB51AHE3/5B 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 P6SMB51AHE3/5B reliable?
The price and inventory of P6SMB51AHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB51AHE3/5B is usually 5 days.
3.What payment methods are accepted for P6SMB51AHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB51AHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB51AHE3/5B?
P6SMB51AHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB51AHE3/5B 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 P6SMB51AHE3/5B?
For technical support, including P6SMB51AHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB51AHE3/5B requirements.
6.How does Aetrix verify that P6SMB51AHE3/5B is sourced from the original manufacturer or authorized distributors?
All P6SMB51AHE3/5B 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 P6SMB51AHE3/5B meets industry standards.
7.What is the process for return or replacement of P6SMB51AHE3/5B?
All P6SMB51AHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB51AHE3/5B, 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 P6SMB51AHE3/5B part is unused and in its original packaging.
Return procedure for P6SMB51AHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB51AHE3/5B Tags
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