RI-03AA Reed Switch SPST-NO Glass Body Equivalent & Substitute Parts

Part Overview

The RI-03AA is a glass body reed switch manufactured by Comus International, classified as SPST-NO (Single Pole Single Throw - Normally Open) configuration. This component is rated for 500mA at 140V AC (200V DC) with a 10W power rating and operates within a 14–23AT activation range. The RI-03AA has been designated as obsolete, necessitating the identification of functionally equivalent substitute components to maintain circuit continuity and system reliability in legacy applications and new designs requiring compatible performance specifications.

Substiute Parts

RI-03AA

Comus InternationalIn Stock: 976RI-03AA Datasheet

Current PartRFQ

RI-03GP1520

Comus InternationalIn Stock: 20178RI-03GP1520 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the RI-03AA is based on electrical equivalence within the RI-03 series from Comus International. The key parameters defining compatible substitutes are:

• Circuit Configuration: SPST-NO (matching contact arrangement)
• Current Rating: 500mA (AC/DC) switching capacity
• Voltage Rating: 140V AC / 200V DC (electrical stress limits)
• Power Dissipation: 10W rated power
• Operate Range: Activation point within acceptable magnetic field sensitivity (14–23AT for original; 15–20AT for substitute represents a narrower but compatible window)
• Mounting and Termination: Through Hole with Axial leads (mechanical fit and board compatibility)
• Temperature Range: -55°C ~ 125°C operational envelope
• Physical Dimensions: 0.100" Dia x 0.591" L body with 1.811" overall length (ensures mechanical interchangeability)

The RI-03GP1520 meets all electrical switching requirements, mechanical form factor constraints, and maintains series compatibility while offering active product status and improved component availability.

Parameter Comparison

Engineering Selection Recommendations

The RI-03GP1520 is the direct substitute for the RI-03AA based on electrical equivalence and physical interchangeability. Key justifications for selection:

• Product Status: The RI-03AA is obsolete; the RI-03GP1520 carries active product status, ensuring continued availability and manufacturing support.
• Regulatory Compliance: Both components maintain RoHS compliance. The RI-03GP1520 achieves ROHS3 Compliant status, representing current compliance with the most recent RoHS directive requirements.
• REACH Status: Both components are REACH Unaffected, confirming no substance of very high concern (SVHC) restrictions apply.
• Electrical Equivalence: Identical current and voltage ratings (500mA AC/DC, 140V AC, 200V DC) ensure direct functional replacement without circuit redesign.
• Mechanical Compatibility: Identical through-hole mounting, axial termination, overall length, and body dimensions enable direct pin-compatible substitution on printed circuit boards.
• Operate Range Consideration: The RI-03GP1520 operate range (15–20AT) is narrower than the RI-03AA (14–23AT) but falls within the original specification window, making it suitable for applications where magnetic field sensitivity is predictable and stable.

Frequently Asked Questions (FAQ)

Q: Can the RI-03GP1520 directly replace the RI-03AA without PCB modifications? A: Yes. Both components are through-hole axial reed switches with identical physical dimensions (1.811" length, 0.100" diameter body), allowing direct PCB mounting without layout changes.

Q: What is the difference between the operate ranges? A: The RI-03AA operates at 14–23AT (ampere-turns), while the RI-03GP1520 operates at 15–20AT. The substitute has a narrower activation window but remains compatible with applications where the magnetic field strength is controlled and stable within the 15–20AT band.

Q: Are there compatibility concerns with voltage or current ratings? A: No. Both components are rated for 500mA at 140V AC (200V DC) with 10W power dissipation, making them electrically equivalent for switching applications.

Q: What does ROHS3 compliance on the RI-03GP1520 mean? A: ROHS3 represents compliance with the current RoHS directive amendments, including restrictions on additional substances beyond ROHS2. Both parts are RoHS compliant; the RI-03GP1520 simply meets the latest regulatory standard.

Q: Is packaging a consideration when ordering the RI-03GP1520? A: The RI-03GP1520 is supplied in bulk packaging, differing from the unspecified packaging of the RI-03AA. Bulk packaging is standard for through-hole components and does not affect functionality or compatibility.

Q: Can the RI-03GP1520 be used in temperature-critical applications? A: Yes. Both components operate across -55°C to 125°C, covering industrial and extended temperature environments.