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Vishay General Semiconductor - Diodes Division P6SMB51A-E3/52
- Part No.:
- P6SMB51A-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB51A-E3/52.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:182
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Product details
Overview
P6SMB51A-E3/52 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, featuring 51 V breakdown voltage (VBR), 43.6 V stand-off voltage (VWM), and 70.1 V maximum clamping voltage (VC) at 8.6 A peak pulse current. It delivers 600 W peak pulse power with 10/1000 µs waveform for protecting MOSFETs, ICs, and sensor signal lines against inductive switching transients in industrial and automotive electronics.
For engineers reviewing the P6SMB51A-E3/52 datasheet, P6SMB51A-E3/52 pinout, P6SMB51A-E3/52 application, or P6SMB51A-E3/52 equivalent, key selection criteria include clamping performance under 10/1000 µs surge, thermal resistance (RθJA = 100 °C/W), RoHS-compliant matte tin plating, and AEC-Q101 qualification eligibility via HE3 suffix variants.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, optimized for fast transient suppression on DC power rails and low-voltage signal paths. Its glass-passivated junction ensures stable leakage (<1 µA at VWM) and low incremental surge resistance, enabling consistent clamping across repetitive 0.01% duty-cycle surges.
The device is rated for -65 °C to +150 °C operating junction temperature and meets J-STD-020 MSL Level 1 (260 °C peak reflow). Its SMB package supports automated placement and provides UL 94 V-0 flammability compliance with 0.2" × 0.2" copper pad thermal management per specification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 48.5 V / 53.6 V - Ensures reliable turn-on above normal operating voltage while avoiding false triggering |
| VWM | 43.6 V - Maximum continuous reverse voltage before leakage exceeds 1 µA; sets safe operating margin below VBR |
| VC @ IPPM | 70.1 V - Clamped voltage during 8.6 A 10/1000 µs surge; defines worst-case stress on protected downstream circuitry |
| PPPM | 600 W - Peak pulse power handling capability under standardized surge waveform; determines transient energy absorption capacity |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; guides PCB thermal design for reliability |
| IFSM | 100 A - Non-repetitive forward surge rating (8.3 ms half-sine); supports inrush current immunity in power rail protection |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive or high-ambient industrial environments |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode identified by black band.
| 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 battery protection) |
| Cathode | Reverse-biased clamping terminal | Connected to higher-potential side (e.g., VCC rail); avalanches to clamp transients when reverse voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables robust protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surge events without derating |
| Glass passivated junction | Ensures stable VBR tolerance (±5%) and low leakage (<1 µA) over temperature and lifetime |
| MSL Level 1 moisture sensitivity | Allows direct placement without baking; compatible with standard SMT reflow profiles up to 260 °C peak |
| RoHS-compliant, halogen-free option (M3 suffix) | Meets environmental compliance requirements for consumer, industrial, and automotive end equipment |
| AEC-Q101 qualification path | HE3/HM3 variants support automotive-grade reliability validation for engine control, ADAS, and body electronics |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Suppressing load-dump transients (ISO 7637-2 Pulse 5a) on 12 V battery-fed ECUs in passenger vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and ground to clamp surges up to 120 V within nanoseconds. Use Value: Limits voltage seen by downstream LDOs and microcontrollers to ≤70.1 V, preventing latch-up or permanent damage. | Use Scenario: Protecting analog output pins of pressure/temperature sensors in PLC modules exposed to relay coil kickback. IC Role / Device Role / Timing Role: Low-capacitance TVS shunting transient energy from 4–20 mA loop or 0–10 V analog outputs. Use Value: Maintains signal integrity with <1 µA leakage at 43.6 V, ensuring measurement accuracy remains unaffected during normal operation. |
| Consumer Power Adapter Input Stage | Telecom DC Power Feeding Protection |
Use Scenario: Guarding primary-side controller ICs in AC/DC adapters against lightning-induced surges on input rectified bus. IC Role / Device Role / Timing Role: Fast-response TVS absorbing 600 W pulses before MOVs react, reducing stress on upstream bridge rectifier. Use Value: Extends adapter lifetime by limiting peak voltage to 70.1 V during 10/1000 µs transients, avoiding gate oxide breakdown in PWM controllers. | Use Scenario: Safeguarding PoE-powered devices (e.g., IP cameras) against surges entering via 48 V DC feed lines. IC Role / Device Role / Timing Role: Standoff-rated TVS on powered device input, clamping induced transients before they reach Ethernet PHY or DC/DC converter. Use Value: Provides 43.6 V working voltage margin above nominal 48 V PoE, allowing safe operation while clamping to 70.1 V during surge events. |
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 VBR range (48.5–53.6 V), but 400 W PPPM and SMA package (higher RθJA = 150 °C/W) | Limited to lower-energy transients; less suitable for automotive load dump where 600 W is required | Select P6SMB51A-E3/52 when 600 W surge handling and SMB thermal performance are mandatory |
| 1.5SMC51A | Same 600 W rating and VBR, but larger SMC (DO-214AB) package with higher mounting pad area requirement | Requires more PCB space; better for high-volume industrial boards where layout density is not constrained | Choose P6SMB51A-E3/52 for space-constrained designs needing identical electrical specs in smaller SMB footprint |
Compared with SMAJ51A and 1.5SMC51A, P6SMB51A-E3/52 uniquely balances 600 W surge capability, SMB package size, and 100 °C/W thermal resistance-making it optimal for automotive and dense industrial PCBs where both power handling and board area are critical.
Availability
P6SMB51A-E3/52 is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface design, and telecom power feeding requiring stable component supply with RoHS compliance and traceable sourcing.
Supply support for P6SMB51A-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, rectifiers, and protection devices with emphasis on reliability, precision, 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 ISO 7637-2 standards with robust thermal and surge performance.
FAQ
What is the breakdown voltage tolerance for P6SMB51A-E3/52?
The P6SMB51A-E3/52 has a specified breakdown voltage (VBR) range of 48.5 V to 53.6 V at 1.0 mA test current, corresponding to a ±5% tolerance about the nominal 51 V rating. This tight tolerance ensures predictable clamping behavior across production lots and temperature ranges, critical for precise overvoltage protection in sensitive 48 V or 5 V rail applications where P6SMB51A-E3/52 is deployed.
Is P6SMB51A-E3/52 suitable for automotive applications?
Yes, P6SMB51A-E3/52 is qualified for automotive use when ordered with HE3 or HM3 suffixes (e.g., P6SMB51AHE3_B), which denote AEC-Q101 qualification. The base P6SMB51A-E3/52 variant is commercial-grade but shares identical electrical and thermal characteristics; its 150 °C junction rating, MSL Level 1 reflow compatibility, and glass-passivated junction make it suitable for under-hood and body-control module designs where P6SMB51A-E3/52 is used for load-dump protection.
What is the maximum clamping voltage of P6SMB51A-E3/52 under surge conditions?
The maximum clamping voltage (VC) of P6SMB51A-E3/52 is 70.1 V at 8.6 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during worst-case transient events. Engineers must verify that downstream components-such as microcontrollers or gate drivers referenced to the same rail-can withstand this 70.1 V clamping level, confirming P6SMB51A-E3/52's suitability for the target application.
How does the SMB package of P6SMB51A-E3/52 compare thermally to SMA or SMC alternatives?
P6SMB51A-E3/52 in SMB (DO-214AA) package has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W on 0.2" × 0.2" copper pads, outperforming SMAJ51A (150 °C/W) and matching 1.5SMC51A only when the latter uses larger pad areas. This lower RθJA allows P6SMB51A-E3/52 to sustain higher average power dissipation in compact layouts, making it preferable for thermally constrained applications where P6SMB51A-E3/52 replaces larger-footprint alternatives without sacrificing surge capability.
Does P6SMB51A-E3/52 have bidirectional capability?
No, P6SMB51A-E3/52 is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. Bidirectional variants use the "CA" suffix (e.g., P6SMB51CA). The unidirectional configuration of P6SMB51A-E3/52 provides superior forward conduction capability (100 A IFSM) and lower leakage in DC-coupled applications like power rail protection, whereas P6SMB51A-E3/52 is not intended for AC signal line clamping where symmetrical response is required.
P6SMB51A-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):
- 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)
P6SMB51A-E3/52 FAQ
1.How can I place an order for P6SMB51A-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB51A-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 P6SMB51A-E3/52 reliable?
The price and inventory of P6SMB51A-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 P6SMB51A-E3/52 is usually 5 days.
3.What payment methods are accepted for P6SMB51A-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB51A-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB51A-E3/52?
P6SMB51A-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB51A-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 P6SMB51A-E3/52?
For technical support, including P6SMB51A-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB51A-E3/52 requirements.
6.How does Aetrix verify that P6SMB51A-E3/52 is sourced from the original manufacturer or authorized distributors?
All P6SMB51A-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 P6SMB51A-E3/52 meets industry standards.
7.What is the process for return or replacement of P6SMB51A-E3/52?
All P6SMB51A-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB51A-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 P6SMB51A-E3/52 part is unused and in its original packaging.
Return procedure for P6SMB51A-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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