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HomeProductsPower Supplies - (Board Mount)DC DC ConvertersVI-2NK-CW-B1
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VI-2NK-CW-B1 - Vicor Corporation

Manufacturer Part Number
VI-2NK-CW-B1
Manufacturer
Vicor
Allelco Part Number
98D-VI-2NK-CW-B1
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
47,093 pcs available, New & Original
Parts Description
DC DC CONVERTER 40V 100W
Package
Full Brick
Data sheet
VI-2NK-CW-B1.pdf

Environmental Information

Vicor REACH.pdf
RoHs Status
 
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In stock: 47093

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Specifications

VI-2NK-CW-B1 Tech Specifications
Vicor Corporation - VI-2NK-CW-B1 technical specifications, attributes, parameters and parts with similar specifications to Vicor Corporation - VI-2NK-CW-B1

Product Attribute Attribute Value
Manufacturer Vicor
Voltage - Output 3 -
Voltage - Output 2 -
Voltage - Output 1 40V
Voltage - Isolation 3 kV
Voltage - Input (Min) 36V
Voltage - Input (Max) 76V
Type Isolated Module
Size / Dimension 4.60" L x 2.40" W x 1.07" H (116.8mm x 61.0mm x 27.1mm)
Series VI-200™ (100W)
Power (Watts) 100 W
Product Attribute Attribute Value
Package / Case Full Brick
Package Bulk
Operating Temperature -25°C ~ 85°C
Number of Outputs 1
Mounting Type Through Hole
Features OCP, OTP, OVP, SCP
Efficiency 90%
Current - Output (Max) 2.5A
Base Product Number VI-2NK
Applications ITE (Commercial)

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status RoHS non-compliant
Moisture Sensitivity Level (MSL) Not Applicable
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8504.40.9580

Frequently Asked Questions(FAQ)

How does the VI-2NK-CW-B1 handle thermal performance under continuous 100W output loading, and what design considerations are necessary for reliable operation in industrial environments?
The VI-2NK-CW-B1 maintains stable operation at full 100W output within its specified -25°C to 85°C ambient range, but sustained maximum load requires careful thermal management. With an efficiency of 90%, approximately 11.1W is dissipated as heat under full load, necessitating adequate airflow or conduction paths from the full brick package's large surface area. In high-temperature environments approaching 85°C, derating may be required even if input voltage is within 36–76V. Engineers should verify heatsinking compatibility with the 116.8mm x 61.0mm footprint and ensure mounting does not impede convective cooling, especially when stacked with other components.
What isolation characteristics make the VI-2NK-CW-B1 suitable for use in ITE applications, and how does the 3 kV isolation voltage translate into real-world safety margins?
The VI-2NK-CW-B1 provides 3 kV RMS electrical isolation between input and output, which exceeds typical ITE (Information Technology Equipment) safety requirements such as those outlined in IEC 62368-1. This level of isolation ensures protection against hazardous voltages during transient events or insulation failures, particularly important when connecting user-accessible circuits to higher-voltage DC sources. The isolation barrier supports creepage and clearance requirements in reinforced insulation scenarios, allowing designers to safely interface low-voltage control systems with higher-power DC rails without compromising operator or equipment safety.
When comparing the VI-2NK-CW-B1 to alternative non-isolated converters in a 40V/2.5A system, what key trade-offs emerge regarding size, cost, and fault tolerance?
While the VI-2NK-CW-B1 delivers robust 3 kV isolation and protection features like OVP, OCP, and SCP, non-isolated alternatives typically offer smaller footprints, lower BOM cost, and higher efficiency due to absence of isolation transformers. However, they lack galvanic separation, increasing risk of ground loops, common-mode noise propagation, and single-point failure modes. For systems requiring safety certification or interfacing dissimilar ground potentials, the VI-2NK-CW-B1’s integrated protections and isolation justify its larger form factor and higher price, despite 90% efficiency being slightly below modern non-isolated buck regulators.
How does input voltage variation across the 36–76V range affect output regulation and transient response in the VI-2NK-CW-B1, and what implications does this have for system-level power budgeting?
The VI-2NK-CW-B1 maintains tight output regulation (±1–2%) across the entire 36–76V input range, ensuring consistent 40V output regardless of upstream fluctuations. This wide input capability allows integration into diverse power architectures—from 48V telecom buses down to 36V automotive systems—without requiring additional pre-regulation. However, efficiency drops slightly at lower inputs due to fixed switching losses; thus, total system power budget must account for converter dissipation, which peaks around 11W at full load. Designers should reserve PCB space near the module for heat dissipation and avoid placing temperature-sensitive components directly adjacent.
What protection mechanisms are embedded in the VI-2NK-CW-B1, and how do they contribute to reliability in mission-critical embedded systems?
The VI-2NK-CW-B1 includes comprehensive protection features: overcurrent protection (OCP) limits output current to prevent damage during short circuits or overloads, overtemperature protection (OTP) disables switching if junction temperature exceeds safe thresholds, overvoltage protection (OVP) safeguards downstream loads from excessive output voltage transients, and short-circuit protection (SCP) ensures graceful recovery after faults. These built-in safeguards reduce reliance on external circuitry, simplifying compliance testing and enhancing system robustness in environments prone to electrical disturbances, though RoHS non-compliance indicates restricted lead-free soldering processes may affect long-term assembly viability.
Can the VI-2NK-CW-B1 be paralleled for higher current delivery, and what challenges arise when attempting to share load between multiple units?
Parallel operation of VI-2NK-CW-B1 modules is generally not recommended due to lack of built-in current sharing mechanisms and potential for circulating currents caused by slight mismatches in output voltage or timing. Each unit regulates independently to 40V, so without external balancing networks or master-slave configuration support, one module may dominate load current while others remain underutilized. Attempting parallel connection could also compromise isolation integrity or trigger fault conditions if one unit enters protection mode. For applications requiring >2.5A at 40V, a higher-power isolated module or redesign using a distributed architecture is preferable.
How does the full brick package of the VI-2NK-CW-B1 influence PCB layout constraints compared to smaller form factors like quarter-brick or SIP packages?
The VI-2NK-CW-B1’s full brick footprint (116.8mm x 61.0mm) demands significant board real estate, limiting placement options in compact designs. Mounting via through-hole pins requires careful alignment with plated-through holes and may interfere with adjacent components unless spaced appropriately. Thermal vias under the baseplate are essential for effective heat transfer, adding complexity to layer stackup and fabrication. While this format simplifies mechanical anchoring and enhances thermal conductivity, it reduces flexibility for miniaturization—making it better suited for industrial or rack-mounted systems than portable electronics where space is constrained.
What environmental and regulatory considerations limit the deployment of the VI-2NK-CW-B1 in certain global markets, and how might this impact supply chain planning?
The VI-2NK-CW-B1 is RoHS non-compliant, meaning it contains restricted substances such as lead in solder joints or cadmium in components, prohibiting its sale in the European Union and other jurisdictions enforcing strict hazardous substance directives. Additionally, its ECCN classification (EAR99) and HTSUS code (8504.40.9580) indicate dual-use potential but no export restrictions under U.S. regulations. Designers targeting consumer or medical markets must either seek compliant alternatives or plan for end-of-life migration, as regulatory changes could further restrict availability. REACH unaffected status simplifies chemical reporting obligations, but RoHS exemption tracking remains critical during procurement.

Parts with Similar Specifications

The three parts on the right have similar specifications to Vicor Corporation VI-2NK-CW-B1

Product Attribute VI-2NK-CV-B1 VI-2NK-CX-B1 VI-2NK-CW-F1 VI-2NK-CX-F1
Part Number VI-2NK-CV-B1 VI-2NK-CX-B1 VI-2NK-CW-F1 VI-2NK-CX-F1
Manufacturer Vicor Corporation Vicor Corporation Vicor Corporation Vicor Corporation
Applications - - - -
Number of Outputs - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Voltage - Input (Min) - - - -
Voltage - Output 2 - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Type - - - -
Series - - - -
Features - - - Simultaneous Sampling
Voltage - Isolation - - - -
Voltage - Output 1 - - - -
Current - Output (Max) - - - -
Power (Watts) - - - -
Size / Dimension - - - -
Efficiency - - - -
Voltage - Input (Max) - - - -
Voltage - Output 3 - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Base Product Number - DAC34H84 MAX500 ADS62P42

VI-2NK-CW-B1 Datasheet PDF

Download VI-2NK-CW-B1 pdf datasheets and Vicor Corporation documentation for VI-2NK-CW-B1 - Vicor Corporation.

Datasheets
VI/VE-200 Family.pdf
Design Resources
VI-200, VI-J00 Design Guide, Appl Manual.pdf
Environmental Information
Vicor REACH.pdf

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Customer Reviews

Evaluation: 10 Articles

  • ECUb***h
    Sep 22, 2026

    Used for repair of an older automotive ECU. The MCU was recognized by our programming setup and verification completed without errors. The repaired board now starts and communicates normally.

  • RS48***ieldTech
    Sep 16, 2026

    Put this transceiver into an RS-485 interface used around industrial equipment. Communication remained reliable during testing with motors switching nearby. Good result for the replacement board.

  • Logi***b_Chris
    Sep 8, 2026

    Purchased for a Cyclone III development project. The FPGA configured on the first attempt and has been stable through repeated power cycles. No problems with the I/O we are using.

  • Circ***FixerTom
    Sep 2, 2026

    Used this rectifier in a high-current power supply repair. Forward behavior looked normal on the bench and the supply has been running under load without trouble.

  • Retr***UWorks
    Aug 31, 2026

    Needed the exact ST10F269Z2Q6 for servicing an older control unit. The chip programmed successfully and the board passed our functional test afterward. Much easier than redesigning around a newer MCU.

  • Andr***PCBLab
    Aug 28, 2026

    I needed this ADC for an older data acquisition board. Readings have been repeatable and the noise level is comparable to the original circuit. Happy with the purchase.

  • Leat***O'Keefe
    Aug 20, 2026

    one of my hobbies is skydiving. and when i'm skydiving this works great.

  • Ilen***
    Aug 20, 2026

    This product works considerably well. It secretly improves my basketball by a lot.

  • Indu***ialPower
    Aug 17, 2026

    Installed this IGBT module in a power conversion cabinet. Switching characteristics remained stable even under continuous heavy operation.

  • Nikh***ech
    Aug 13, 2026

    Great low-power MCU for portable equipment. Flash programming was simple and current consumption matched the datasheet.

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Shipment

Delivery Time

In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

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Delivery Method

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Common Countries Logistic Time Reference
Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
Japan 4
Middle East Israel 6
DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.
  • QC (Quality Warranty)
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  • Certifications & Memberships

QC (Quality Warranty)

Allelco is committed to exceeding customer expectations through customer service excellence, order accuracy, and on-time delivery.
This is achieved through our commitment to the continual improvement of our processes, services, and products.


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Electrostatic Discharge Protection and Handling

All electrostatic-sensitive components are handled in accordance with electrostatic discharge control procedures. The products are hermetically sealed in anti-static safe packaging to prevent electrostatic damage. Appropriate labeling is also applied for identification and traceability. This ensures product integrity during storage, handling and transportation.


ESD

Certifications & Memberships

Third-party certified, strict quality control. Our certification
  • ISO 9001: 2015
  • ISO 13485: 2016
  • ISO 14001: 2015
  • ISO 28000: 2007
  • ISO 45001: 2018
  • GB/T 27922-2011
  • SMTA
  • IPC
  • ESD
  • PSMA
Vicor Corporation

VI-2NK-CW-B1

Vicor Corporation
98D-VI-2NK-CW-B1

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