CV120300 Isolation Transformer 120V to 120V 300VA Equivalent & Substitute Parts

Part Overview

The CV120300 is an isolation transformer manufactured by Hammond Manufacturing, designed to provide galvanic isolation between primary and secondary circuits at 120V with a maximum power rating of 300VA. This transformer features NEMA 5-15P input and dual NEMA 5-15R output connectors, making it suitable for standard North American electrical applications requiring isolation.

The CV120300 carries an Obsolete product status. Identifying equivalent and substitute parts is necessary to maintain system functionality and ensure continued availability for replacement or new installations where isolation transformer requirements align with current product offerings.

Substiute Parts

CV120300

Hammond ManufacturingIn Stock: 808CV120300 Datasheet

Current PartRFQ

MD-500-U

Triad MagneticsIn Stock: 809MD-500-U Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the CV120300 is determined by the following critical parameters:

• Isolation Type: Both primary and secondary must provide galvanic isolation at 120V input and output
• Voltage Specifications: Primary voltage 120V and secondary voltage 120V are mandatory for direct substitution
• Power Rating: The substitute must meet or exceed the 300VA maximum power requirement
• Connector Compatibility: NEMA 5-15P input and NEMA 5-15R (2) output connectors must be present
• Regulatory Compliance: RoHS3 compliance and EAR99 ECCN classification maintain consistency with the original part

The MD-500-U from Triad Magnetics satisfies all substitution criteria. While it carries a Medical Grade designation and provides 500VA capacity (exceeding the 300VA requirement), it maintains identical voltage specifications, connector types, and regulatory compliance status.

Parameter Comparison

Engineering Selection Recommendations

The MD-500-U serves as a direct functional substitute for the CV120300. Both transformers maintain identical primary and secondary voltage specifications (120V to 120V) and connector configurations (NEMA 5-15P input, dual NEMA 5-15R outputs). The MD-500-U's 500VA power rating provides operational headroom above the CV120300's 300VA specification, ensuring adequate capacity for applications originally designed for the Hammond unit.

Both parts maintain ROHS3 compliance and EAR99 classification, confirming regulatory alignment. The MD-500-U's Active product status ensures ongoing availability and supply chain continuity, addressing the obsolescence of the CV120300.

Frequently Asked Questions (FAQ)

Q: Can the MD-500-U replace the CV120300 in existing installations?

A: Yes. The MD-500-U provides identical voltage transformation (120V primary to 120V secondary) and connector compatibility (NEMA 5-15P input, dual NEMA 5-15R outputs). Physical mounting and electrical integration remain compatible for applications rated at or below 300VA.

Q: What is the significance of the Medical Grade designation on the MD-500-U?

A: Medical Grade indicates the MD-500-U meets additional design and manufacturing standards for medical device applications. This designation does not restrict use in non-medical applications; it confirms enhanced quality and compliance standards that exceed standard isolation transformer requirements.

Q: Why does the MD-500-U have a higher power rating (500VA vs. 300VA)?

A: The increased power capacity provides operational margin and flexibility for applications with variable or future load requirements. Substituting a higher-rated transformer does not degrade performance in applications designed for lower power levels.

Q: Are there packaging differences between the CV120300 and MD-500-U?

A: The CV120300 is packaged as a standard unit, while the MD-500-U is supplied in Bulk packaging. Both maintain identical electrical specifications and connector interfaces. Packaging differences do not affect electrical compatibility or functional performance.

Q: Do both transformers meet the same regulatory requirements?

A: Yes. Both the CV120300 and MD-500-U are ROHS3 compliant, REACH Unaffected, and classified as EAR99 under export control regulations, confirming equivalent regulatory standing.