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Vishay General Semiconductor - Diodes Division P6SMB51CA-E3/5B
- Part No.:
- P6SMB51CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB51CA-E3/5B.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,219
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Product details
Overview
P6SMB51CA-E3/5B from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping voltage transients on signal and power lines. It features a 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 rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial and automotive electronics.
For engineers reviewing the P6SMB51CA-E3/5B datasheet, P6SMB51CA-E3/5B pinout, P6SMB51CA-E3/5B application, or P6SMB51CA-E3/5B equivalent, this device serves as a RoHS-compliant, AEC-Q101-qualified (via HE3/HM3 variants) transient suppressor optimized for bidirectional surge protection in space-constrained PCB layouts requiring high-reliability ESD and lightning-induced transient suppression without polarity sensitivity.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical clamping performance regardless of voltage polarity - critical for AC-coupled signal lines and differential bus protection. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM = 43.6 V), while MSL Level 1 moisture sensitivity supports lead-free reflow up to 260 °C.
The device exhibits a temperature coefficient of VBR of +0.102 %/°C and thermal resistance of RθJA = 100 °C/W (typical), enabling predictable derating above 25 °C ambient. With a 150 °C maximum junction temperature and 5.0 W steady-state power dissipation, it sustains repetitive transients under controlled duty cycles in thermally managed designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 48.5–53.6 V at 1.0 mA test current - defines precise clamping onset threshold for bidirectional overvoltage events |
| Stand-off Voltage VWM | 43.6 V maximum - ensures no conduction during normal operation, preserving signal integrity on protected lines |
| Clamping Voltage VC | 70.1 V at 8.6 A IPPM - limits downstream voltage stress during 600 W transient surges |
| Peak Pulse Power PPPM | 600 W with 10/1000 µs waveform - delivers robust surge immunity compliant with IEC 61000-4-5 Level 4 |
| Junction Temperature Range | −65 to +150 °C - supports operation in extended-temperature industrial and automotive under-hood environments |
| Package | SMB (DO-214AA) - surface-mount footprint (5.59 mm × 4.06 mm) compatible with automated placement and reflow |
| RoHS Compliance | E3 suffix - lead-free, halogen-free per JEDEC J-STD-020, qualified for commercial-grade applications |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; no polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional terminal pair | No functional polarity - either terminal accepts positive or negative transient energy equally |
| Case / Body | Non-electrical mechanical interface | Provides thermal path to PCB copper pads; requires 0.2" × 0.2" (5.0 mm × 5.0 mm) minimum pad area per terminal |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables compliance with IEC 61000-4-5 surge immunity requirements for industrial equipment |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for sensitive ICs |
| Glass passivated chip junction | Ensures long-term stability of VBR and low leakage under thermal cycling and humidity stress |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow without preconditioning, reducing manufacturing complexity |
| AEC-Q101 qualification path | HE3/HM3 variants available - enables drop-in use in automotive ECUs where reliability validation is mandatory |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Analog Input Protection |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point to shunt surge energy before reaching signal conditioning circuitry. Use Value: Maintains signal fidelity during 10/1000 µs transients up to ±70.1 V, preventing latch-up or damage to 5 V/3.3 V microcontrollers and ADC front-ends. |
Use Scenario: Safeguarding 4–20 mA current loop and 0–10 V analog inputs in programmable logic controllers against field-wiring induced surges and ESD. IC Role / Device Role / Timing Role: Low-capacitance (≈100 pF at 0 V) TVS placed across input terminals to clamp transients without distorting slow-slewing analog signals. Use Value: Limits clamped voltage to ≤70.1 V while drawing <1 µA leakage at 43.6 V, ensuring minimal impact on measurement accuracy and loop compliance. |
| Telecom Line Card Surge Protection | Consumer Appliance Motor Drive Protection |
|
Use Scenario: Shielding Ethernet PHY interfaces, DSL line drivers, and PoE injectors from lightning-induced surges on unshielded twisted-pair cabling. IC Role / Device Role / Timing Role: Primary-level TVS mounted adjacent to RJ-45 connectors to absorb common-mode surges before secondary protection stages. Use Value: Delivers 600 W pulse handling with symmetrical response, eliminating need for dual unidirectional devices and simplifying layout on dense line cards. |
Use Scenario: Suppressing inductive kickback from brushed DC motors and relay coils in washing machines, HVAC controls, and power tools. IC Role / Device Role / Timing Role: Across-the-line suppressor bridging motor terminals to clamp reverse EMF spikes during commutation and switch-off. Use Value: Clamps transients to ≤70.1 V within nanoseconds, protecting MOSFET half-bridges and gate drivers from avalanche overstress and cumulative degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ51CA | 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; less suitable for IEC 61000-4-5 Level 4 testing | Select when board space is constrained and surge threat level is Class 2 or lower |
| SMCJ51CA | Higher PPPM = 1500 W; larger SMC (DO-214AB) package; same VBR, VC, and bidirectional behavior | Required for high-energy surge environments (e.g., outdoor telecom, utility metering) | Choose when system-level testing mandates >600 W capability or thermal margin is critical |
Compared with SMAJ51CA and SMCJ51CA, the P6SMB51CA-E3/5B provides optimal balance of 600 W surge handling, SMB footprint compatibility, and commercial-grade cost-effectiveness - making it ideal for mid-tier industrial and automotive applications where space and energy thresholds align precisely with its rated performance envelope.
Availability
P6SMB51CA-E3/5B is available at Aetrix Electronics and suitable for industrial PLCs, automotive sensor modules, telecom line cards, and consumer appliance motor drives requiring stable component supply with consistent RoHS-compliant sourcing.
Supply support for P6SMB51CA-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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The P6SMB Series targets surface-mount transient suppression in space-constrained, high-volume applications - engineered for robustness against inductive switching, ESD, and lightning surges in automotive, industrial, and communications systems.
FAQ
What is the polarity configuration of the P6SMB51CA-E3/5B?
The P6SMB51CA-E3/5B is a bidirectional TVS diode, meaning it functions identically for both positive and negative voltage transients. Unlike unidirectional variants (e.g., P6SMB51A), it has no cathode band marking and provides symmetrical clamping performance - essential for protecting AC-coupled lines, differential buses, or circuits where voltage polarity is undefined or reversible.
Does the P6SMB51CA-E3/5B meet automotive qualification standards?
The base P6SMB51CA-E3/5B is RoHS-compliant and commercial-grade. However, Vishay offers AEC-Q101-qualified versions under ordering codes such as P6SMB51CAHE3_B and P6SMB51CAHM3_B (with "_B" revision suffix). These variants undergo additional stress testing for automotive use, while the E3/5B variant itself is not AEC-Q101 certified but shares identical electrical and thermal specifications.
What is the maximum clamping voltage of the P6SMB51CA-E3/5B under surge conditions?
The P6SMB51CA-E3/5B has a maximum clamping voltage (VC) of 70.1 V at 8.6 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during standardized surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
How does the P6SMB51CA-E3/5B compare to unidirectional P6SMB51A in terms of application suitability?
The P6SMB51CA-E3/5B is functionally distinct from the unidirectional P6SMB51A: it clamps transients in both directions, whereas P6SMB51A only protects against reverse-biased surges. Use P6SMB51CA-E3/5B for AC lines, differential pairs, or any node where polarity reversal is possible; reserve P6SMB51A for DC power rails with defined polarity and cathode-to-ground orientation.
What PCB layout guidance applies to the P6SMB51CA-E3/5B for optimal thermal and electrical performance?
For reliable operation, mount the P6SMB51CA-E3/5B on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve specified thermal resistance (RθJA = 100 °C/W). Minimize trace length between the device and protected node, avoid vias in current paths, and ensure no solder mask over thermal pads - adherence to this layout preserves both surge-handling capability and long-term reliability under repetitive transient stress.
P6SMB51CA-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:
- -
- Bidirectional Channels:
- 1
- 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)
P6SMB51CA-E3/5B FAQ
1.How can I place an order for P6SMB51CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB51CA-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 P6SMB51CA-E3/5B reliable?
The price and inventory of P6SMB51CA-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 P6SMB51CA-E3/5B is usually 5 days.
3.What payment methods are accepted for P6SMB51CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB51CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB51CA-E3/5B?
P6SMB51CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB51CA-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 P6SMB51CA-E3/5B?
For technical support, including P6SMB51CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB51CA-E3/5B requirements.
6.How does Aetrix verify that P6SMB51CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All P6SMB51CA-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 P6SMB51CA-E3/5B meets industry standards.
7.What is the process for return or replacement of P6SMB51CA-E3/5B?
All P6SMB51CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB51CA-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 P6SMB51CA-E3/5B part is unused and in its original packaging.
Return procedure for P6SMB51CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB51CA-E3/5B Tags
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