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HomeProductsPower Supplies - (Board Mount)DC DC ConvertersVI-2NK-CV-S
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VI-2NK-CV-S - Vicor Corporation

Manufacturer Part Number
VI-2NK-CV-S
Manufacturer
Vicor
Allelco Part Number
98D-VI-2NK-CV-S
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
35,236 pcs available, New & Original
Parts Description
DC DC CONVERTER 40V 150W
Package
Full Brick
Data sheet
VI-2NK-CV-S.pdf

Environmental Information

Vicor REACH.pdf
RoHs Status
 
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In stock: 35236

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Specifications

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

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 1.80' W x 0.52' H (116.8mm x 45.7mm x 13.2mm)
Series VI-200™ (150W)
Power (Watts) 150 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) 3.75A
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)

What are the key thermal and efficiency considerations when integrating the VI-2NK-CV-S into a high-reliability industrial power system with tight space constraints?
The VI-2NK-CV-S achieves 90% efficiency across its full load range, which reduces heat dissipation compared to lower-efficiency converters, but still requires careful thermal management. Operating between -25°C and 85°C, it is suitable for harsh environments, yet derating may be necessary at elevated ambient temperatures due to its Full Brick package dimensions (116.8mm x 45.7mm x 13.2mm). The compact footprint supports dense layouts, but convection cooling must be evaluated in sealed or high-density enclosures where airflow is limited.
How does the VI-2NK-CV-S compare to alternative Vicor VI-200 series modules like the VI-2NK-CU-S in terms of input voltage tolerance and protection features?
While both share the same 36V–76V input range and 40V/3.75A output, the CV-S variant offers enhanced protection circuitry including overvoltage, overtemperature, and short-circuit safeguards, whereas the CU-S typically omits some protection layers. This makes the VI-2NK-CV-S more robust for mission-critical applications where fault tolerance is essential, though it may introduce minor cost and size trade-offs.
Can the VI-2NK-CV-S be used in medical equipment despite being listed under ITE (Commercial) applications?
The VI-2NK-CV-S is not certified for medical use and carries RoHS non-compliance status, which may restrict deployment in regulated medical devices requiring full compliance with international standards. Its 3 kV isolation rating and robust protections support safety in commercial settings, but substitution into medical systems would require additional certification and risk assessment.
What isolation performance should engineers expect from the VI-2NK-CV-S when subjected to transient surges in an automotive-grade power environment?
With a rated voltage isolation of 3 kV, the VI-2NK-CV-S provides strong galvanic separation suitable for most industrial and telecom environments. However, in automotive applications exposed to ISO 7637-2 pulse conditions, supplemental transient voltage suppression may be needed, as the internal isolation is not designed to withstand sustained high-energy transients beyond its standard specifications.
Is the VI-2NK-CV-S compatible with conformal coating processes commonly used in ruggedized electronics?
The module's through-hole mounting and Full Brick construction allow for conformal coating application, but Vicor recommends verifying compatibility post-coating due to potential impacts on thermal performance and moisture ingress. Since MSL is not applicable, shelf-life concerns are minimal, but long-term reliability under coated conditions should be validated in the target application.
How does the VI-2NK-CV-S handle load transients during rapid current changes, such as those seen in motor control or pulsed laser systems?
The VI-2NK-CV-S exhibits stable regulation under dynamic loads due to its fast feedback loop and inherent output capacitance, but peak currents up to 3.75A may cause temporary voltage dips if the downstream circuit has high input impedance. For critical transient-sensitive loads, adding local bulk capacitance near the output can improve stability without affecting the converter’s intrinsic response.
What design precautions are necessary when paralleling multiple VI-2NK-CV-S units to increase output current capacity?
Parallel operation is generally discouraged unless using Vicor’s proprietary active-current-sharing technology, which is not supported by the standard VI-2NK-CV-S. Passive paralleling risks imbalance due to component tolerances and thermal gradients, potentially leading to one unit carrying excess load. If redundancy is required, consider Vicor’s modular systems or consult application notes for qualified configurations.
Why might a designer choose the VI-2NK-CV-S over discrete isolated DC-DC solutions despite its higher cost?
The VI-2NK-CV-S integrates magnetics, control, and protection in a single encapsulated module, reducing PCB complexity and time-to-market. Its 90% efficiency and proven reliability in commercial ITE applications offer better total system cost over time compared to discrete designs, especially in medium-volume production where BOM consolidation outweighs unit cost savings.
Does the VI-2NK-CV-S support remote on/off (remote sense) functionality for distributed power architectures?
No, the VI-2NK-CV-S lacks built-in remote sensing or enable pins; it operates via direct input voltage application. In systems requiring remote control, an external MOSFET or optocoupler circuit must be added, introducing additional components and potential timing mismatches. This limits its suitability for advanced power sequencing without supplementary circuitry.
How does the operating temperature range of the VI-2NK-CV-S impact selection in aerospace or downhole drilling applications?
While the -25°C to 85°C range covers many industrial scenarios, it falls short of aerospace-grade (-55°C to +125°C) or extreme downhole conditions. Engineers evaluating the VI-2NK-CV-S for such uses must conduct environmental stress testing and may need to implement thermal buffering or forced air cooling to maintain junction temperatures within safe limits.
What are the implications of the VI-2NK-CV-S being RoHS non-compliant in EU-based manufacturing?
The RoHS non-compliance indicates restricted substances above threshold levels, likely due to leaded soldering or certain additives. This prevents use in finished products sold within the European Union unless exemptions apply. Engineers sourcing the VI-2NK-CV-S for EU markets must verify end-product compliance strategies or seek alternative compliant models.
Can the VI-2NK-CV-S be used in renewable energy inverters with variable input voltages exceeding 76V?
No, the maximum input voltage is strictly 76V. Inputs above this limit risk damaging the internal circuitry, even momentarily. For solar or wind systems with open-circuit voltages beyond 76V, a pre-regulator stage is required to step down the voltage before the VI-2NK-CV-S, adding system complexity and efficiency loss.
How reliable is the VI-2NK-CV-S over extended operational life under continuous full-load conditions?
Based on typical Vicor VI-200 series field data, the VI-2NK-CV-S demonstrates high mean time between failures (MTBF) in controlled environments. However, long-term derating—especially at 85°C case temperature with full 150W output—can accelerate aging. Thermal cycling and solder joint fatigue remain primary failure modes, necessitating mechanical stress analysis in vibration-prone applications.
What input filtering requirements exist for the VI-2NK-CV-S to meet EMI standards in CISPR 32 Class B environments?
Although the module includes basic filtering, meeting stringent EMI limits often demands additional input capacitors and common-mode chokes. The 36V–76V wide input range increases conducted noise susceptibility, so engineers should design LC filters tailored to switching harmonics, ensuring the VI-2NK-CV-S operates within regulatory boundaries without relying solely on internal suppression.

Parts with Similar Specifications

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

Product Attribute VI-2NK-CV-F2 VI-2NK-CV-B1 VI-2NK-CV-F3 VI-2NK-CV-F4
Part Number VI-2NK-CV-F2 VI-2NK-CV-B1 VI-2NK-CV-F3 VI-2NK-CV-F4
Manufacturer Vicor Corporation Vicor Corporation Vicor Corporation Vicor Corporation
Mounting Type - Surface Mount Through Hole Surface Mount
Voltage - Input (Min) - - - -
Series - - - -
Base Product Number - DAC34H84 MAX500 ADS62P42
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Voltage - Isolation - - - -
Voltage - Output 3 - - - -
Applications - - - -
Power (Watts) - - - -
Number of Outputs - - - -
Current - Output (Max) - - - -
Voltage - Output 2 - - - -
Type - - - -
Voltage - Output 1 - - - -
Efficiency - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Voltage - Input (Max) - - - -
Features - - - Simultaneous Sampling
Size / Dimension - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C

VI-2NK-CV-S Datasheet PDF

Download VI-2NK-CV-S pdf datasheets and Vicor Corporation documentation for VI-2NK-CV-S - 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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Evaluation: 10 Articles

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

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

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

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Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
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New Zealand 5
Asia India 4
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Middle East Israel 6
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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.
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VI-2NK-CV-S Image

VI-2NK-CV-S

Vicor Corporation
98D-VI-2NK-CV-S

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