RI-48A Glass Body Reed Switch Equivalent & Substitute Parts

Part Overview

The RI-48A is a glass body reed switch manufactured by Comus International, classified as SPST-NO (Single Pole Single Throw - Normally Open) with a switching capacity of 1A at 250V AC. This through-hole mounted component operates within a 15 ~ 28AT magnetic field range and is rated for 70W power dissipation with response times of 0.35ms operate and 0.03ms release.

The RI-48A is designated as obsolete product status. Locating equivalent substitute components becomes necessary when through-hole inventory is depleted or when design requirements permit alternative mounting configurations. The RI-48GP-2025 provides functional equivalence with updated product status and modified operating parameters.

Substiute Parts

RI-48A

Comus InternationalIn Stock: 863RI-48A Datasheet

Current PartRFQ

RI-48GP-2025

Comus InternationalIn Stock: 829RI-48GP-2025 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RI-48A with the RI-48GP-2025 is permissible based on the following electrical and mechanical parameter alignment:

Matching Parameters:

• Circuit configuration: Both SPST-NO
• Switching current: Both 1A (AC/DC)
• Switching voltage AC: Both 250V
• Switching voltage DC: Both 200V
• Rated power: Both 70W
• Response times: Both 0.35ms operate / 0.03ms release
• Operating temperature range: Both -55°C ~ 125°C
• Component type: Both glass body reed switches
• Physical dimensions: Identical overall length and body size

Differing Parameters:

• Operate range: RI-48A operates at 15 ~ 28AT; RI-48GP-2025 operates at 20 ~ 25AT
• Release range: RI-48A releases at 8 ~ 20AT; RI-48GP-2025 releases at 13 ~ 20AT
• Mounting type: RI-48A is through-hole; RI-48GP-2025 is surface mount
• Current carry capacity: RI-48A carries 1.75A (AC/DC); RI-48GP-2025 carries 2.25A (DC)
• Product status: RI-48A is obsolete; RI-48GP-2025 is active

The RI-48GP-2025 operates within a narrower magnetic field activation window (20 ~ 25AT versus 15 ~ 28AT), which represents a subset of the original part's operating range. This substitution is valid for applications where the magnetic field strength remains within the 20 ~ 25AT band.

Parameter Comparison

Engineering Selection Recommendations

RI-48GP-2025 Substitution Criteria:

The RI-48GP-2025 serves as a functional equivalent to the RI-48A when the following conditions are met:

1. Magnetic Field Specification: The application environment must maintain magnetic field strength within the 20 ~ 25AT operating range. Applications requiring activation below 20AT or above 25AT cannot use the RI-48GP-2025 as a direct substitute.

2. Mounting Configuration: PCB design must accommodate surface mount termination. Through-hole mounting requirements cannot be satisfied by the RI-48GP-2025.

3. Product Status Advantage: The RI-48GP-2025 holds active product status with ROHS3 compliance, ensuring continued manufacturing availability and regulatory alignment compared to the obsolete RI-48A.

4. Electrical Performance: All switching voltage, current, and power ratings remain identical. The RI-48GP-2025 provides enhanced DC current carry capacity (2.25A DC versus 1.75A AC/DC), offering improved performance margin in DC applications.

5. Compliance Certification: Both components maintain RoHS compliance, REACH unaffected status, and EAR99 ECCN classification, ensuring regulatory equivalence.

Frequently Asked Questions (FAQ)

Q: Can the RI-48GP-2025 replace the RI-48A in all applications?

A: No. The RI-48GP-2025 operates within a narrower magnetic field range (20 ~ 25AT) compared to the RI-48A (15 ~ 28AT). Substitution is valid only when the application's magnetic field strength remains within 20 ~ 25AT. Additionally, the RI-48GP-2025 requires surface mount PCB design, whereas the RI-48A uses through-hole mounting.

Q: What is the significance of the different operate and release ranges?

A: The operate range defines the magnetic field strength at which the switch closes. The release range defines the field strength at which the switch opens. The RI-48GP-2025's narrower ranges (20 ~ 25AT operate, 13 ~ 20AT release) represent tighter specifications than the RI-48A. Applications designed for the RI-48A's broader range may not function reliably with the RI-48GP-2025 if magnetic field strength falls outside the 20 ~ 25AT band.

Q: Are there electrical performance differences between these parts?

A: Electrical switching specifications are identical: 1A at 250V AC, 200V DC, 70W rated power, and 0.35ms operate time. The RI-48GP-2025 provides higher DC current carry capacity (2.25A DC) compared to the RI-48A (1.75A AC/DC), representing an improvement for DC-only applications.

Q: Why is the RI-48A listed as obsolete?

A: The RI-48A is designated obsolete by the manufacturer. The RI-48GP-2025 represents the active product line continuation. For new designs or component replenishment, the RI-48GP-2025 is the recommended selection when magnetic field and mounting requirements align.

Q: What mounting differences exist between these components?

A: The RI-48A uses through-hole axial termination for insertion into drilled PCB holes. The RI-48GP-2025 uses surface mount axial termination for placement on PCB pads. These mounting types are not interchangeable without PCB redesign.

Q: Are both components RoHS compliant?

A: Yes. The RI-48A is RoHS compliant. The RI-48GP-2025 is ROHS3 compliant, representing the current RoHS standard. Both components are REACH unaffected and classified as EAR99 for export purposes.

Q: What is the operating temperature range for both parts?

A: Both the RI-48A and RI-48GP-2025 operate across -55°C to 125°C, providing identical thermal performance specifications.