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HomeProductsPower Supplies - (Board Mount)DC DC ConvertersVI-B3Y-MY-F4
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VI-B3Y-MY-F4 - Vicor Corporation

Manufacturer Part Number
VI-B3Y-MY-F4
Manufacturer
Vicor
Allelco Part Number
98D-VI-B3Y-MY-F4
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
36,289 pcs available, New & Original
Parts Description
DC DC CONVERTER 3.3V 33W
Package
Full Brick
Data sheet
VI-B3Y-MY-F4.pdf

Environmental Information

Vicor REACH.pdf
RoHs Status
 
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In stock: 36289

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Specifications

VI-B3Y-MY-F4 Tech Specifications
Vicor Corporation - VI-B3Y-MY-F4 technical specifications, attributes, parameters and parts with similar specifications to Vicor Corporation - VI-B3Y-MY-F4

Product Attribute Attribute Value
Manufacturer Vicor
Voltage - Output 3 -
Voltage - Output 2 -
Voltage - Output 1 3.3V
Voltage - Isolation 3 kV
Voltage - Input (Min) 42V
Voltage - Input (Max) 60V
Type Isolated Module
Size / Dimension 4.60' L x 1.86' W x 1.05' H (116.8mm x 47.2mm x 26.7mm)
Series VI-200™ (50W)
Power (Watts) 33 W
Product Attribute Attribute Value
Package / Case Full Brick
Package Bulk
Operating Temperature -55°C ~ 85°C
Number of Outputs 1
Mounting Type Through Hole
Features OCP, OTP, OVP, SCP
Efficiency 90%
Current - Output (Max) 10A
Base Product Number VI-B3Y
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-B3Y-MY-F4 compare to other Vicor VI-200 series modules in terms of power density and isolation performance for industrial applications?
The VI-B3Y-MY-F4 delivers 33W output within a full brick package measuring 4.60" x 1.86" x 1.05", achieving approximately 0.7W/in³, which is typical for mid-range VI-200 modules. While not the highest power variant in the series, it maintains consistent 3kV isolation across all units, ensuring reliable galvanic separation. Compared to higher-power VI-200 models like the VI-J3Y or VI-K3Y, the B3Y variant trades peak wattage for optimized thermal performance at moderate loads, making it suitable where space constraints are less critical than cost and reliability.
What design considerations should be made when integrating the VI-B3Y-MY-F4 into a system operating near its maximum input voltage of 60V?
At 60V input, the VI-B3Y-MY-F4 operates near its thermal envelope due to increased switching losses. Designers must ensure adequate airflow over the module’s surface, as derating may be necessary above 50°C ambient. Input capacitance should be minimized to reduce inrush current, and transient load steps exceeding 10A/μs should be avoided to prevent triggering overcurrent protection. Additionally, PCB layout must maintain strict creepage distances due to the 3kV isolation rating, especially in polluted environments.
Can the VI-B3Y-MY-F4 be used in parallel with another Vicor module to increase current capacity, and what precautions are required?
Parallel operation is possible but not supported out-of-the-box; active current sharing requires external control circuitry or use of Vicor’s proprietary Factorized Power Architecture (FPA) ecosystem. Direct paralleling without balancing risks current hogging and premature failure. If implemented, output inductors must have tightly matched inductance values, and feedback loops should be isolated to prevent instability. The VI-B3Y-MY-F4 lacks built-in droop or master/slave signaling, so custom solutions are typically needed.
How does the efficiency curve of the VI-B3Y-MY-F4 behave under partial load conditions, and what impact does this have on thermal management?
The VI-B3Y-MY-F4 maintains approximately 90% efficiency at full load (33W), but drops to around 85% at 25% load (8.25W), primarily due to fixed switching losses. This means even at light loads, significant heat is generated relative to output power. Therefore, thermal management remains critical regardless of load level. A heatsink or forced convection is recommended unless the application allows for intermittent duty cycling.
What are the implications of the VI-B3Y-MY-F4 being RoHS non-compliant for commercial product development targeting global markets?
The RoHS non-compliance status of the VI-B3Y-MY-F4 restricts its use in regions with strict hazardous substance regulations, including most of Europe and China. Projects aiming for CE marking or Chinese market access will require alternative components unless an exemption applies. This may necessitate redesign efforts or dual-sourcing strategies, increasing supply chain complexity and potentially delaying time-to-market.
Is it safe to operate the VI-B3Y-MY-F4 continuously at 10A output if the input voltage is 48V, and how does temperature affect long-term reliability?
Operating at 10A output from a 48V input draws approximately 6.9A input current, resulting in roughly 33W dissipation assuming 90% efficiency. Continuous full-load operation at elevated ambient temperatures (e.g., above 60°C) accelerates aging of internal components. While the module includes overtemperature protection, prolonged exposure near 85°C reduces mean time between failures. Derating to 8A or lower is advisable for mission-critical systems in uncontrolled environments.
How does the VI-B3Y-MY-F4 handle reverse polarity on the input, and what additional protection might still be needed?
The VI-B3Y-MY-F4 does not include reverse polarity protection internally. Applying reversed input voltage can damage the converter. To mitigate risk, designers should install an external blocking diode rated for at least 60V and sufficient current (e.g., 10A Schottky), placed in series with the positive input. Alternatively, a MOSFET-based reverse polarity circuit offers lower forward drop but increases component count.
What are the key differences between the VI-B3Y-MY-F4 and similar non-isolated DC-DC converters in terms of noise and EMI performance?
Unlike non-isolated converters, the VI-B3Y-MY-F4 provides 3kV electrical isolation, which inherently reduces conducted and radiated noise coupling between input and output stages. However, its switching frequency (typically >100kHz) introduces high-frequency emissions that require careful filtering. Without isolation, common-mode noise would propagate directly through ground paths, making the VI-B3Y-MY-F4 preferable in noise-sensitive or safety-critical applications despite added complexity.
Can the VI-B3Y-MY-F4 be used in aerospace or military applications given its operating temperature range and packaging?
The VI-B3Y-MY-F4 supports -55°C to 85°C operation, meeting many industrial and some avionics standards, but it lacks qualification to MIL-PRF-38534 or DO-160. Its full brick packaging and through-hole mounting are compatible with automated assembly, but conformal coating compatibility should be verified. For aerospace use, additional screening and environmental testing may be required beyond standard commercial grades.
How does the VI-B3Y-MY-F4 respond to sudden load transients, and what output filtering is recommended?
The VI-B3Y-MY-F4 features fast dynamic response due to internal compensation, capable of settling within microseconds during typical load steps. However, for applications requiring tight regulation under rapid transients (e.g., >5A/μs), an output capacitor bank with low ESL (e.g., ceramic + polymer) is advised. A minimum of 100μF effective capacitance at the output helps dampen oscillations and maintain stability.
What precautions should be taken when soldering the VI-B3Y-MY-F4 due to its package type and thermal characteristics?
As a through-hole full brick module, the VI-B3Y-MY-F4 has large thermal mass and multiple solder joints. Excessive soldering iron time or temperature (>350°C) can delaminate internal layers or damage isolation barriers. Use of a hot-air rework station with precise temperature control is discouraged. Instead, wave soldering with controlled preheat profiles is preferred. Ensure mechanical strain relief at leads to avoid cracking internal connections during vibration.
Does the VI-B3Y-MY-F4 support remote on/off functionality, and how is it implemented?
Yes, the VI-B3Y-MY-F4 supports remote on/off via pin 12 (Remote On/Off), which disables internal drive signals when pulled below 0.8V. To turn off, connect pin 12 to GND through a pull-down resistor (e.g., 1kΩ). Turning on requires floating pin 12 or connecting it to Vin+ via a resistor (e.g., 10kΩ). This feature enables system-level power sequencing without modifying input supply.
How does the VI-B3Y-MY-F4 compare to alternative isolated converters from competitors like CUI or RECOM in terms of footprint and efficiency trade-offs?
Competitors offer similarly sized modules (e.g., RECOM RxxS-3.3/10), but the VI-B3Y-MY-F4 achieves slightly higher efficiency (90%) compared to many third-party equivalents (typically 85–88%). However, Vicor’s modules often command premium pricing and longer lead times. Third-party alternatives may offer better RoHS compliance or lower cost, but lack integrated protection features like comprehensive OVP and SCP found in the VI-B3Y-MY-F4.
What happens if the VI-B3Y-MY-F4 experiences a short circuit on the output, and how quickly does it recover?
Upon detecting a short circuit, the VI-B3Y-MY-F4 enters hiccup mode, shutting down and attempting restart every few seconds. Recovery time depends on fault duration and thermal state, typically taking 5–10 seconds after removal of the short. This behavior prevents catastrophic failure but may cause undesirable interruptions in continuous-operation systems, suggesting the need for external monitoring or soft-start logic.
Is there a difference in performance between using the VI-B3Y-MY-F4 with ceramic versus electrolytic input capacitors?
Ceramic capacitors provide superior high-frequency decoupling and lower ESR, improving stability margins and reducing ripple. However, they exhibit piezoelectric effects and potential microphonic noise under vibration. Electrolytics offer higher bulk capacitance but higher ESR. For optimal performance, combine both: a 10–47μF ceramic in parallel with a 100μF low-ESR aluminum polymer cap near the input terminals of the VI-B3Y-MY-F4.
Can the VI-B3Y-MY-F4 be mounted vertically, and what are the thermal implications?
Vertical mounting is mechanically feasible due to its through-hole design, but airflow patterns change significantly. Natural convection becomes inefficient, increasing junction temperatures by 10–20°C compared to horizontal orientation. Forced ventilation must be directed across the top surface. Thermal simulation or testing is recommended before finalizing enclosure design, as vertical placement may compromise MTBF estimates.

Parts with Similar Specifications

The three parts on the right have similar specifications to Vicor Corporation VI-B3Y-MY-F4

Product Attribute VI-B3Y-MY-F2 VI-B3Y-MY-F1 VI-B3Y-MX-F4 VI-B3Y-MY-F3
Part Number VI-B3Y-MY-F2 VI-B3Y-MY-F1 VI-B3Y-MX-F4 VI-B3Y-MY-F3
Manufacturer Vicor Corporation Vicor Corporation Vicor Corporation Vicor Corporation
Voltage - Output 1 - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Efficiency - - - -
Voltage - Output 2 - - - -
Current - Output (Max) - - - -
Series - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Type - - - -
Size / Dimension - - - -
Voltage - Isolation - - - -
Voltage - Output 3 - - - -
Voltage - Input (Max) - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Number of Outputs - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Base Product Number - DAC34H84 MAX500 ADS62P42
Voltage - Input (Min) - - - -
Power (Watts) - - - -
Features - - - Simultaneous Sampling
Applications - - - -

VI-B3Y-MY-F4 Datasheet PDF

Download VI-B3Y-MY-F4 pdf datasheets and Vicor Corporation documentation for VI-B3Y-MY-F4 - 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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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.
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Vicor Corporation

VI-B3Y-MY-F4

Vicor Corporation
98D-VI-B3Y-MY-F4

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