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Vishay General Semiconductor - Diodes Division 6DFN51A-M3/I
- Part No.:
- 6DFN51A-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- 2-VDFN
- Datasheet:
-
6DFN51A-M3/I.pdf
- Description:
- 600W,51V 5%, DFN3820A TVS
- Quantity:
- Payment:
- Shipping:
Inventory:13,920
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Product details
Overview
6DFN51A-M3/I from Vishay General Semiconductor is a unidirectional surface-mount TRANSZORB® transient voltage suppressor in DFN3820A package, with 48.5 V (min) / 51.0 V (nom) / 53.6 V (max) breakdown voltage, 43.6 V stand-off voltage, 70.1 V clamping voltage at 8.6 A peak pulse current, and 600 W peak pulse power (10/1000 μs). It protects MOSFETs and ICs in industrial sensor signal lines against lightning-induced transients.
For engineers reviewing the 6DFN51A-M3/I datasheet, 6DFN51A-M3/I pinout, 6DFN51A-M3/I application, or 6DFN51A-M3/I equivalent, key selection criteria include unidirectional polarity, DFN3820A side-wettable flanks for AOI compatibility, 175 °C max junction temperature, 0.88 mm profile, and M3 halogen-free/RoHS/industrial-grade qualification.
Technical Context
This device uses passivated anisotropic rectifier technology to deliver precise unidirectional clamping with low leakage (<1.0 μA at VWM) and stable temperature coefficient (0.093 %/°C). Its DFN3820A package enables high-density PCB layout while supporting automated optical inspection via side-wettable flanks.
The 6DFN51A-M3/I operates across -65 °C to +175 °C, with thermal resistance junction-to-mount of 5–6.5 °C/W and junction-to-ambient of 140–175 °C/W on FR4. It meets IEC 61000-4-2 ESD immunity at ±30 kV (contact/air discharge).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 48.5 / 51.0 / 53.6 V - defines minimum voltage at which device enters avalanche conduction under 1 mA test current |
| VWM | 43.6 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 70.1 V at 8.6 A - clamping voltage during 10/1000 μs surge, limiting downstream voltage stress |
| PPPM | 600 W - peak pulse power handling capability per standard 10/1000 μs waveform |
| Junction Temp Range | -65 °C to +175 °C - supports operation in harsh industrial and automotive under-hood environments |
| Package | DFN3820A - 3.95 mm × 2.18 mm × 0.88 mm low-profile leadless package with side-wettable flanks |
| ESD Rating | ±30 kV contact/air (IEC 61000-4-2) - provides robust electrostatic discharge protection without external circuitry |
Pinout & Package
DFN3820A is a 2-terminal surface-mount package with cathode marked by color band; anode connects to exposed metal pad (heatsink). Dimensions: 3.95 mm × 2.18 mm × 0.88 mm (L × W × H), with side-wettable flanks for AOI-compatible solder joint inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (exposed pad) | Current return path / thermal interface | Serves as primary heat dissipation path to PCB copper; electrically connected to cathode-side ground reference in unidirectional configuration |
| Cathode (marked terminal) | Transient current sink | Connected to protected line; conducts surge current to anode when VWM exceeded, clamping voltage to ≤70.1 V |
Key Features
| Feature | Design Value |
|---|---|
| Side-wettable flanks | Enables automated optical inspection (AOI) of solder joints without X-ray, reducing manufacturing defect escape |
| Low-profile height (0.88 mm) | Supports ultra-thin end equipment designs and minimizes board-level mechanical stress during thermal cycling |
| M3 material grade | Halogen-free, RoHS-compliant, Pb-free terminations qualified to JESD 201 Class 2 whisker resistance |
| Passivated anisotropic rectifier | Delivers tight VBR tolerance (±5 %), low leakage (<1.0 μA), and stable clamping over temperature |
| MSL Level 1 rating | Allows unlimited floor life at ≤30 °C/60 % RH; no bake required prior to reflow, simplifying SMT process flow |
Applications
| Industrial Sensor Signal Protection | Automotive Body Control Module Inputs |
|---|---|
Use Scenario: Protecting analog voltage outputs of pressure/temperature sensors in factory automation PLC I/O modules from inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between sensor output and microcontroller ADC input to clamp surges before they reach sensitive analog front-end. Use Value: Limits transient voltage to ≤70.1 V at 8.6 A, preventing latch-up or damage to 3.3 V/5 V ADC inputs while maintaining <1.0 μA leakage at 43.6 V operating bias. | Use Scenario: Safeguarding LIN bus input pins on BCM microcontrollers against load dump and alternator ripple in 12 V vehicle electrical systems. IC Role / Device Role / Timing Role: Standoff-rated TVS mounted directly at connector entry point to absorb fast-rising transients before propagation into LIN transceiver IC. Use Value: Withstands 600 W (10/1000 μs) surges and maintains 43.6 V working voltage margin above typical LIN bus swing, ensuring reliable communication integrity. |
| Medical Patient Monitor ECG Lead Interfaces | Telecom DSL Line Card Surge Protection |
Use Scenario: Shielding high-impedance ECG electrode inputs from ESD events and defibrillator-induced transients in Class II medical devices. IC Role / Device Role / Timing Role: First-line unidirectional transient suppressor placed before instrumentation amplifier input stage to limit fault energy entering analog signal chain. Use Value: Provides ±30 kV IEC 61000-4-2 ESD immunity and clamps 10/1000 μs surges to 70.1 V, preserving signal fidelity and meeting IEC 60601-1-2 EMC requirements. | Use Scenario: Protecting ADSL/VDSL line driver outputs from lightning-induced surges on outdoor copper pairs in central office and CPE equipment. IC Role / Device Role / Timing Role: High-power TVS installed at line interface transformer secondary to shunt induced common-mode surges away from PHY IC. Use Value: Handles 600 W peak pulse power and exhibits 0.093 %/°C VBR tempco, ensuring consistent clamping performance across telecom cabinet temperature ranges (-40 °C to +70 °C). |
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 | DO-214AC package (larger footprint, 4.5 mm × 2.7 mm), higher RθJA (110 °C/W), same VBR/VC specs | Less suitable for ultra-dense layouts; requires larger PCB area and lacks side-wettable flanks for AOI | Select SMAJ51A only if legacy through-hole or larger SMT footprint is acceptable and AOI is not required. |
| SMCJ51A | DO-214AB package (7.1 mm × 6.2 mm), 1500 W PPPM, higher clamping (77.4 V), higher leakage (5.0 μA) | Better for higher-energy threats but over-specified for 600 W needs; incompatible with space-constrained DFN layouts | Choose SMCJ51A only when system-level surge testing exceeds IEC 61000-4-5 Level 4 (4 kV line-earth) and board area permits larger package. |
Compared with SMAJ51A and SMCJ51A, the 6DFN51A-M3/I delivers identical electrical protection performance in a 3.95 mm × 2.18 mm DFN3820A package with AOI-ready side-wettable flanks, enabling miniaturized, high-yield production where footprint and inspection capability are critical.
Availability
6DFN51A-M3/I is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, medical patient monitor inputs, and telecom line card protection requiring stable component supply and long-term manufacturability.
Supply support for 6DFN51A-M3/I 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, MOSFETs, and optoelectronics with emphasis on reliability, precision, and application-specific optimization.
The 6DFN51A-M3/I belongs to Vishay's TRANSZORB® DFN series, engineered for high-density, AOI-compatible transient suppression in space-constrained industrial, medical, and telecom systems where low profile and thermal efficiency are essential.
FAQ
What is the breakdown voltage tolerance for 6DFN51A-M3/I?
The 6DFN51A-M3/I has a breakdown voltage tolerance of ±5 %, specified as 48.5 V (min), 51.0 V (nom), and 53.6 V (max) at 1.0 mA test current. This tight tolerance ensures predictable clamping onset across production lots and temperature ranges, critical for protecting voltage-sensitive ICs without premature conduction.
Does 6DFN51A-M3/I support automatic optical inspection (AOI)?
Yes, the 6DFN51A-M3/I features side-wettable flanks in its DFN3820A package, enabling reliable solder joint inspection using standard AOI systems without requiring X-ray. This design reduces post-SMT defect escapes and improves yield in high-volume manufacturing of compact electronics.
What is the maximum clamping voltage of 6DFN51A-M3/I under surge conditions?
The 6DFN51A-M3/I clamps to a maximum of 70.1 V at 8.6 A peak pulse current (10/1000 μs waveform). This value is measured per IEC 61000-4-5 and defines the upper voltage limit imposed on protected circuitry during standardized surge events.
Is 6DFN51A-M3/I halogen-free and RoHS-compliant?
Yes, the 6DFN51A-M3/I carries the M3 suffix, indicating it is halogen-free, RoHS-compliant, and features matte tin-plated terminations that meet J-STD-002 and JESD 22-B102 solderability standards, along with JESD 201 Class 2 whisker resistance.
What is the thermal resistance specification for 6DFN51A-M3/I?
The 6DFN51A-M3/I has a typical junction-to-mount thermal resistance (RθJM) of 5 °C/W and a junction-to-ambient resistance (RθJA) of 140 °C/W when mounted on a standard FR4 PCB per JEDEC 51-2A. These values enable effective heat dissipation in high-reliability industrial applications.
6DFN51A-M3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- 2-VDFN
- Series:
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- DFN3820A
6DFN51A-M3/I FAQ
1.How can I place an order for 6DFN51A-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 6DFN51A-M3/I 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 6DFN51A-M3/I reliable?
The price and inventory of 6DFN51A-M3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 6DFN51A-M3/I is usually 5 days.
3.What payment methods are accepted for 6DFN51A-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 6DFN51A-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 6DFN51A-M3/I?
6DFN51A-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 6DFN51A-M3/I 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 6DFN51A-M3/I?
For technical support, including 6DFN51A-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 6DFN51A-M3/I requirements.
6.How does Aetrix verify that 6DFN51A-M3/I is sourced from the original manufacturer or authorized distributors?
All 6DFN51A-M3/I 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 6DFN51A-M3/I meets industry standards.
7.What is the process for return or replacement of 6DFN51A-M3/I?
All 6DFN51A-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with 6DFN51A-M3/I, 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 6DFN51A-M3/I part is unused and in its original packaging.
Return procedure for 6DFN51A-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
6DFN51A-M3/I Tags
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ESD9B5.0ST5G
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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