FP120-20 Equivalent & Substitute Parts Reference

Part Overview

The FP120-20 is an active laminated core power transformer manufactured by Triad Magnetics, rated at 2.5VA with dual primary and secondary windings. This through-hole mounted component operates at 115V or 230V primary voltage with configurable secondary output (parallel 60V/40mA or series 120V/20mA). The part is RoHS3 compliant and maintains 2000Vrms isolation rating. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, design flexibility, or supply chain considerations.

Substiute Parts

FP120-20

Triad MagneticsIn Stock: 1113FP120-20 Datasheet

Current PartRFQ

229E120

Hammond ManufacturingIn Stock: 785229E120 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FP120-20 is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

• Primary voltage options: 115V and 230V dual configuration
• Secondary voltage outputs: Parallel 60V and series 120V capability
• Output current ratings: Parallel 40mA and series 20mA
• Dual primary and dual secondary winding architecture
• Power rating: minimum 2.0VA (acceptable tolerance for 2.5VA rated component)
• Voltage isolation: minimum 1750Vrms

Mechanical Compatibility Requirements:

• Through-hole mounting type
• PC pin termination style
• Height seated maximum: 16.51mm
• Footprint dimensions compatible with PCB layout

Compliance Requirements:

• RoHS3 compliance mandatory
• REACH unaffected status
• EAR99 classification

The Hammond Manufacturing 229E120 meets all electrical and mechanical substitution criteria with the exception of power rating (2VA versus 2.5VA), which represents a 0.5VA reduction within acceptable engineering tolerance for this transformer category.

Parameter Comparison

Engineering Selection Recommendations

FP120-20 (Triad Magnetics) - Primary Selection:

• Specified for applications requiring 2.5VA power capacity
• Laminated core construction provides standard EMI characteristics
• 2000Vrms isolation rating suitable for high-voltage isolation requirements
• Active product status with 1018 units in stock ensures supply continuity
• RoHS3 and REACH compliance confirmed

229E120 (Hammond Manufacturing) - Substitute Selection:

• Acceptable substitute when 2.0VA power capacity meets application requirements
• Semi-toroidal core construction offers alternative electromagnetic performance profile
• 1750Vrms isolation rating adequate for standard industrial isolation applications
• Active product status with 698 units in stock provides alternative supply source
• RoHS3 and REACH compliance confirmed
• Bulk packaging differs from box packaging of primary part

Selection between these parts depends on application power requirements and core type performance specifications. Both parts satisfy electrical and mechanical compatibility criteria for through-hole PCB mounting with dual voltage primary and secondary configurations.

Frequently Asked Questions (FAQ)

Q: Can the 229E120 directly replace the FP120-20 in all applications?

A: The 229E120 is electrically and mechanically compatible with the FP120-20 for applications requiring 2.0VA or less. Applications demanding the full 2.5VA capacity require the FP120-20. Both parts share identical primary voltage options, secondary voltage configurations, output current ratings, winding architecture, mounting type, termination style, and seated height.

Q: What is the difference between laminated and semi-toroidal core construction?

A: The FP120-20 uses laminated core construction; the 229E120 uses semi-toroidal construction. Both are acceptable core types for power transformers. Core type selection depends on specific application requirements for EMI performance, efficiency, and thermal characteristics, which are not specified in the substitution parameters.

Q: Does the lower isolation voltage rating of the 229E120 affect substitution eligibility?

A: The 229E120 provides 1750Vrms isolation versus 2000Vrms for the FP120-20. For applications requiring 2000Vrms isolation, the FP120-20 is mandatory. For applications with 1750Vrms isolation requirements or lower, the 229E120 is acceptable.

Q: Are there packaging differences between these parts?

A: Yes. The FP120-20 is supplied in box packaging; the 229E120 is supplied in bulk packaging. Packaging affects handling, storage, and inventory management but does not affect electrical or mechanical performance.

Q: Do both parts meet current compliance standards?

A: Both the FP120-20 and 229E120 are RoHS3 compliant and REACH unaffected. Both carry EAR99 classification. Compliance status is current and equivalent between the two parts.

Q: What are the dimensional differences between these transformers?

A: The FP120-20 measures 47.63mm L × 39.67mm W; the 229E120 measures 39.62mm L × 47.75mm W. Both have identical seated height of 16.51mm. Footprint orientation differs, requiring PCB layout verification before substitution.