VI-21X-MX Equivalent & Substitute Parts Reference

Part Overview

The Vicor Corporation VI-21X-MX is an isolated DC-DC converter module featuring a single output of 5.2V at 14.42A, with an input voltage range of 21V to 32V, 75W output power, and a 3kV isolation rating. This model belongs to the VI-200™ (75W) Series and is designed for ITE (commercial) applications. It is packaged in a full brick, through-hole mount format. The VI-21X-MX is classified as obsolete, making the identification of direct substitutes critical for continued support and maintenance in existing designs.

Key Parameters

Manufacturer Part Number	Series	Type	Number of Outputs	Voltage - Input (Min)	Voltage - Input (Max)	Voltage - Output 1	Current - Output (Max)	Power (Watts)	Voltage - Isolation	Applications	Features	Operating Temperature	Efficiency	Mounting Type	Package / Case	Size / Dimension	RoHS Status	Product Status
VI-21X-MX	VI-200™ (75W)	Isolated Module	1	21V	32V	5.2V	14.42A	75 W	3 kV	ITE (Commercial)	OCP, OTP, OVP, SCP	-55°C ~ 85°C	90%	Through Hole	Full Brick	4.60" L x 2.40" W x 0.50" H	RoHS non-compliant	Obsolete

Substitute Part Grouping Explanation

Substitutes for VI-21X-MX are determined based exclusively on the following key parameters: electrical characteristics (input/output voltage, output current, power rating, isolation rating, efficiency), operating conditions (temperature, mounting type), physical dimensions (full brick format), features (OCP, OTP, OVP, SCP), application scope, and regulatory compliance. Only parts matching exactly in these defined parameters are included in the equivalent group for direct substitution. Product status is also considered for ensuring long-term supply continuity.

Parameter Comparison

Manufacturer Part Number	Series	Type	Number of Outputs	Voltage - Input (Min)	Voltage - Input (Max)	Voltage - Output 1	Current - Output (Max)	Power (Watts)	Voltage - Isolation	Applications	Features	Operating Temperature	Efficiency	Mounting Type	Package / Case	Size / Dimension	RoHS Status	Product Status
VI-21X-MX	VI-200™ (75W)	Isolated Module	1	21V	32V	5.2V	14.42A	75 W	3 kV	ITE (Commercial)	OCP, OTP, OVP, SCP	-55°C ~ 85°C	90%	Through Hole	Full Brick	4.60" L x 2.40" W x 0.50" H	RoHS non-compliant	Obsolete
VI-21X-MX-B1	VI-200™ (75W)	Isolated Module	1	21V	32V	5.2V	14.42A	75 W	3 kV	ITE (Commercial)	OCP, OTP, OVP, SCP	-55°C ~ 85°C	90%	Through Hole	Full Brick	4.60" L x 2.40" W x 1.07" H	RoHS non-compliant	Active

Engineering Selection Recommendations

The main part, VI-21X-MX, is obsolete, while the substitute VI-21X-MX-B1 is active and available in inventory. Both are RoHS non-compliant, with identical electrical parameters, operating conditions, features, and application scope. The physical dimensions differ in height only. Both parts have identical compliance status for moisture sensitivity (Not Applicable) and REACH (Unaffected), with matching ECCN (EAR99) and HTSUS classifications.

Frequently Asked Questions (FAQ)

Q1: What parameters must match when choosing a substitute for VI-21X-MX?
A1: Substitution is based on exact matches for input/output voltages, output current, power rating, isolation rating, operating temperature, mounting type, package/case, features, application, and regulatory compliance.

Q2: Are there differences in package size between VI-21X-MX and VI-21X-MX-B1?
A2: Both use a full brick format with identical length and width. The height differs: VI-21X-MX is 0.50" high, and VI-21X-MX-B1 is 1.07" high.

Q3: Is regulatory compliance equivalent for both parts?
A3: Both are RoHS non-compliant, have Not Applicable Moisture Sensitivity Level (MSL), and are REACH unaffected. ECCN and HTSUS are also identical.

Q4: Does product status affect selection?
A4: Yes. VI-21X-MX is obsolete; VI-21X-MX-B1 is active and suitable for ongoing supply.

Q5: Are both suitable for identical applications?
A5: Yes. Both are designed for ITE (commercial) applications and feature the same protections: OCP, OTP, OVP, SCP.

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