FS20-055 Equivalent & Substitute Parts Reference

Part Overview

The FS20-055 is a laminated core power transformer manufactured by Triad Magnetics, rated at 1.1VA with dual primary and secondary windings. This through-hole mounted component is designed for applications requiring isolated AC power conversion with selectable output configurations. The part is currently in active production status with 892 units in stock inventory.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained across the specified parameter range. Alternative sources become necessary due to supply chain considerations, lead time requirements, or design standardization across manufacturing facilities.

Substiute Parts

FS20-055

Triad MagneticsIn Stock: 945FS20-055 Datasheet

Current PartRFQ

162D20

Hammond ManufacturingIn Stock: 1108162D20 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FS20-055 is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

• Identical power rating: 1.1VA maximum
• Matching primary voltage inputs: 115V and 230V dual configuration
• Matching secondary voltage outputs: 10V parallel and 20V series configurations
• Matching maximum output currents: 110mA parallel and 55mA series
• Equivalent isolation voltage: 2500Vrms minimum

Mechanical Compatibility Requirements:

• Laminated core construction type
• Through-hole mounting configuration
• PC pin termination style
• Dual primary and dual secondary winding topology
• No center tap requirement

Compliance Requirements:

• RoHS3 compliance status
• REACH unaffected classification
• EAR99 export control classification

The substitute part 162D20 manufactured by Hammond Manufacturing meets all electrical and mechanical equivalence criteria. Dimensional variations in height (33.32mm versus 23.80mm) and width tolerance (28.58mm versus 28.56mm) remain within acceptable mechanical compatibility ranges for through-hole PCB mounting applications.

Parameter Comparison

Engineering Selection Recommendations

FS20-055 (Triad Magnetics - Primary Selection)

The FS20-055 is the original specified component with active production status and established supply availability (892 units in stock). This part maintains all electrical and mechanical specifications within the design envelope. Selection of the FS20-055 is appropriate when supply is available and lead times are acceptable.

162D20 (Hammond Manufacturing - Substitute Selection)

The 162D20 is a direct electrical equivalent with full parameter compatibility. This substitute is appropriate when:

• FS20-055 supply is unavailable or lead times exceed project requirements
• Design standardization across Hammond Manufacturing transformer product lines is preferred
• Bulk packaging format aligns with procurement strategy

Both parts carry identical RoHS3 and REACH compliance certifications, confirming regulatory equivalence for applications subject to environmental and hazardous substance restrictions.

The dimensional height difference (33.32mm versus 23.80mm) requires verification of available PCB clearance in the mounting area. The width tolerance difference (0.02mm) is negligible for through-hole mounting applications.

Frequently Asked Questions (FAQ)

Q: Can the 162D20 be used as a direct replacement for the FS20-055 in existing designs?

A: Yes. The 162D20 provides electrical equivalence across all specified parameters: identical power rating, primary/secondary voltages, output currents, isolation voltage, and winding configuration. Through-hole mounting and PC pin termination are identical. Mechanical compatibility is confirmed for standard PCB mounting applications.

Q: What is the primary difference between these two parts?

A: The parts are manufactured by different suppliers (Triad Magnetics versus Hammond Manufacturing) and are packaged differently (Box versus Bulk). The 162D20 has a greater seated height (33.32mm versus 23.80mm). All electrical specifications and core construction are equivalent.

Q: Does the height difference affect PCB layout compatibility?

A: The 162D20 requires 9.52mm additional vertical clearance compared to the FS20-055. PCB designs must verify available space above the transformer mounting location. If clearance is constrained, the FS20-055 remains the appropriate selection.

Q: Are both parts compliant with environmental regulations?

A: Yes. Both the FS20-055 and 162D20 carry RoHS3 compliance certification and REACH unaffected classification, confirming compliance with EU environmental and hazardous substance directives.

Q: What is the significance of the packaging difference (Box versus Bulk)?

A: Packaging format affects procurement and inventory management. Box packaging (FS20-055) typically supports smaller order quantities and individual component handling. Bulk packaging (162D20) is optimized for higher-volume procurement and automated assembly processes.

Q: Can these parts be used interchangeably in series or parallel output configurations?

A: Yes. Both parts support identical dual secondary winding configurations with 10V parallel and 20V series output options. Maximum output currents (110mA parallel, 55mA series) are equivalent, confirming interchangeability across all operating modes.

Q: What compliance certifications apply to component selection?

A: Both parts meet EAR99 export control classification and carry identical HTSUS commodity codes (8504.31.4035), confirming regulatory equivalence for international trade and procurement purposes.