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Vishay General Semiconductor - Diodes Division P6SMB56A-E3/52
- Part No.:
- P6SMB56A-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB56A-E3/52.pdf
- Description:
- TVS DIODE 47.8VWM 77VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:1,367
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Product details
Overview
P6SMB56A-E3/52 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in DC power rails and signal lines. It features a 56 V breakdown voltage (VBR = 53.2–58.8 V at IT = 1.0 mA), 47.8 V maximum standoff voltage (VWM), 77.0 V clamping voltage (VC) at 7.8 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 telecom power supplies.
For engineers reviewing the P6SMB56A-E3/52 datasheet, P6SMB56A-E3/52 pinout, P6SMB56A-E3/52 application, or P6SMB56A-E3/52 equivalent, key selection criteria include unidirectional polarity, SMB (DO-214AA) package compatibility, clamping performance under repetitive surge conditions, thermal resistance (RθJA = 100 °C/W), and AEC-Q101 qualification path via HE3 suffix variants.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VWM (47.8 V), it transitions rapidly from high-impedance to low-impedance state, diverting transient energy to ground while limiting downstream voltage to ≤77.0 V. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repeated surge stress.
The device is rated for 100 A non-repetitive forward surge current (IFSM), supports operation from −65 °C to +150 °C junction temperature, and meets J-STD-020 MSL Level 1 with 260 °C lead-free reflow peak - confirming suitability for automated SMT assembly without moisture sensitivity concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 53.2 V / 58.8 V at 1.0 mA test current - defines precise voltage threshold where avalanche conduction begins |
| VWM | 47.8 V maximum - ensures reliable blocking of normal operating voltage with margin before clamping onset |
| VC @ IPPM | 77.0 V at 7.8 A peak pulse - actual worst-case voltage seen by protected circuit during 10/1000 µs transient |
| PPPM | 600 W - peak transient power dissipation capability with 0.01 % duty cycle, enabling protection against lightning-induced surges |
| RθJA | 100 °C/W - thermal resistance from junction to ambient on standard 0.2" × 0.2" copper pads, critical for thermal design margin |
| IFSM | 100 A - single half-sine surge rating (8.3 ms), supporting protection against inductive switch-off events |
| TJ max | +150 °C - maximum junction temperature, allowing use in under-hood automotive and high-ambient industrial environments |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, molded plastic case with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. Cathode indicated by band marking; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to protected line's lower-potential side | Must be tied to system ground or return path when used in clamping configuration on positive rail |
| Cathode | Current exit point in forward bias; marked with band; reverse-biased during clamping | Connected to protected line (e.g., 48 V supply rail); conducts surge current to ground when VIN > VC |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables suppression of high-energy transients such as ISO 7637-2 Pulse 5a without degradation across 1000+ cycles |
| Glass-passivated junction | Ensures stable VBR tolerance and low leakage (<1.0 µA at VWM) over temperature and lifetime |
| MSL Level 1, 260 °C peak reflow | Eliminates pre-baking requirement and supports standard lead-free SMT processes without popcorn risk |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD or inductive kick), improving protection margin |
| AEC-Q101 qualification path | HE3/HM3 variants available - confirms reliability for automotive powertrain and body electronics applications |
Applications
| Automotive Sensor Interface | Industrial PLC Digital Input |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends from load dump and battery disconnect transients in 12 V/24 V systems. IC Role / Device Role / Timing Role: Shunt TVS placed between signal line and chassis ground, clamping spikes within 1 ns response time. Use Value: Limits voltage to ≤77.0 V during 100 V/500 ms load dump event, preventing damage to 5 V or 3.3 V interface ICs. |
Use Scenario: Safeguarding 24 V digital input circuits in programmable logic controllers exposed to relay coil flyback and field wiring surges. IC Role / Device Role / Timing Role: Unidirectional clamp on input line, absorbing 600 W pulses from inductive loads switching at up to 10 Hz. Use Value: Maintains input logic integrity by holding voltage below 80 V during 1 kV/50 Ω surge per IEC 61000-4-5 Level 3. |
| Telecom Power Supply Rail | Consumer USB-C Power Delivery |
Use Scenario: Secondary-side overvoltage protection on +48 V DC-DC converter outputs feeding baseband processors and RF modules. IC Role / Device Role / Timing Role: Standoff-rated TVS parallel to output capacitor, activated only during fault conditions exceeding 47.8 V. Use Value: Prevents latch-up or burnout of downstream PMICs by clamping fault voltage to 77.0 V with <100 ps response. |
Use Scenario: Input-side surge protection on USB-C PD controller power inputs (VCONN, VBUS) in portable devices. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS suppressing ESD (IEC 61000-4-2 ±15 kV) and cable discharge events. Use Value: Delivers 600 W pulse handling without compromising signal integrity due to SMB footprint and minimal parasitic capacitance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ58A | Higher VBR (55–61 V), same SMB package, 600 W rating, but higher VC = 93.6 V at 6.4 A | Less effective clamping margin for 48 V systems requiring tight VC control | Select when higher standoff (50 V) and relaxed clamping voltage are acceptable |
| 1.5SMC56A | Same VBR/VWM/VC specs, but larger SMC (DO-214AB) package (2.54 mm pitch vs. 2.29 mm) | Requires PCB layout change; not drop-in compatible with SMB footprints | Choose only if higher thermal mass or legacy SMC board space is available |
Compared with SMAJ58A and 1.5SMC56A, P6SMB56A-E3/52 delivers tighter clamping (77.0 V vs. ≥93.6 V) in the smallest standardized SMB footprint, making it optimal for space-constrained 48 V rail protection where voltage margin and layout compatibility are critical.
Availability
P6SMB56A-E3/52 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC input conditioning, and telecom DC-DC output safeguarding requiring stable component supply, RoHS-compliant commercial-grade sourcing, and tape-and-reel delivery for SMT production.
Supply support for P6SMB56A-E3/52 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, power efficiency, and automotive-grade qualification.
The P6SMB Series targets cost-sensitive, high-volume transient protection needs in automotive, industrial, and communications equipment - engineered for robustness in harsh environments and seamless integration into automated manufacturing.
FAQ
What is the clamping voltage of P6SMB56A-E3/52 and how is it measured?
The clamping voltage (VC) of P6SMB56A-E3/52 is 77.0 V, measured at 7.8 A peak pulse current using a 10/1000 µs waveform per IEC 61000-4-5. This value represents the maximum voltage imposed on the protected circuit during a standardized surge event and is guaranteed across the full operating temperature range. The P6SMB56A-E3/52 achieves this with low incremental resistance, ensuring predictable and repeatable suppression behavior in real-world applications.
Is P6SMB56A-E3/52 suitable for automotive applications?
P6SMB56A-E3/52 is RoHS-compliant and commercial-grade; however, its AEC-Q101 qualified variant is P6SMB56AHE3_B. While the P6SMB56A-E3/52 itself is not AEC-Q101 certified, it shares identical electrical and thermal specifications with the qualified version and is widely used in non-safety-critical automotive subsystems such as infotainment power rails and body control module sensors - provided system-level validation is performed per OEM requirements.
What is the standoff voltage rating of P6SMB56A-E3/52 and why does it matter?
The maximum standoff voltage (VWM) of P6SMB56A-E3/52 is 47.8 V, meaning it remains in high-impedance blocking mode for all reverse voltages up to this level. This parameter ensures no leakage current or unintended conduction during normal operation of a 48 V nominal system. Selecting a TVS with sufficient VWM margin prevents false triggering while maintaining headroom for ripple and tolerance - critical for stable power rail protection.
How does the SMB (DO-214AA) package of P6SMB56A-E3/52 compare to SMC or SMA packages?
The SMB package of P6SMB56A-E3/52 measures 4.57 mm × 3.94 mm × 2.29 mm - smaller than SMC (DO-214AB) and slightly larger than SMA (DO-214AC). Its 2.29 mm lead pitch enables higher board density than SMC, while offering better thermal dissipation than SMA due to larger copper pad area. The P6SMB56A-E3/52's RθJA of 100 °C/W is optimized for standard 0.2" × 0.2" pads, making it ideal for compact yet thermally demanding layouts where SMC would waste space and SMA would overheat.
Does P6SMB56A-E3/52 have bidirectional capability?
No, P6SMB56A-E3/52 is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. It conducts only when reverse-biased above VBR; forward conduction follows standard silicon diode behavior. For bidirectional protection (e.g., AC lines or differential buses), the equivalent part is P6SMB56CA-E3/52, which has symmetrical breakdown in both directions and no polarity marking.
P6SMB56A-E3/52 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):
- 47.8V
- Voltage - Breakdown (Min):
- 53.2V
- Voltage - Clamping (Max) @ Ipp:
- 77V
- Current - Peak Pulse (10/1000µs):
- 7.8A
- 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)
P6SMB56A-E3/52 FAQ
1.How can I place an order for P6SMB56A-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB56A-E3/52 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 P6SMB56A-E3/52 reliable?
The price and inventory of P6SMB56A-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB56A-E3/52 is usually 5 days.
3.What payment methods are accepted for P6SMB56A-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB56A-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB56A-E3/52?
P6SMB56A-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB56A-E3/52 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 P6SMB56A-E3/52?
For technical support, including P6SMB56A-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB56A-E3/52 requirements.
6.How does Aetrix verify that P6SMB56A-E3/52 is sourced from the original manufacturer or authorized distributors?
All P6SMB56A-E3/52 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 P6SMB56A-E3/52 meets industry standards.
7.What is the process for return or replacement of P6SMB56A-E3/52?
All P6SMB56A-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB56A-E3/52, 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 P6SMB56A-E3/52 part is unused and in its original packaging.
Return procedure for P6SMB56A-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB56A-E3/52 Tags
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