RI-03A Glass Body Reed Switch SPST-NO Equivalent and Substitute Parts

Part Overview

The RI-03A is a Glass Body Reed Switch manufactured by Comus International, featuring SPST-NO (Single Pole Single Throw - Normally Open) circuit configuration. This component operates at 500mA switching current with 140V AC / 200V DC switching voltage and 10W rated power, designed for through-hole mounting applications. The RI-03A is classified as Obsolete product status. Finding equivalent substitute parts is necessary to ensure design continuity and maintain supply chain availability for applications currently utilizing this component.

Substiute Parts

RI-03A

Comus InternationalIn Stock: 756RI-03A Datasheet

Current PartRFQ

RI-03GP2025

Comus InternationalIn Stock: 8775RI-03GP2025 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The RI-03A can be substituted with RI-03GP2025 based on the following critical electrical and mechanical parameters:

Matching Parameters:

• Manufacturer: Comus International (same manufacturer)
• Series: RI-03 (same product series)
• Type: Glass Body Reed (identical type)
• Circuit Configuration: SPST-NO (identical circuit)
• Current - Switching: 500mA (AC/DC) (identical)
• Voltage - Switching AC: 140 V (identical)
• Voltage - Switching DC: 200 V (identical)
• Power - Rated: 10W (identical)
• Operate Time: 0.25 ms (identical)
• Release Time: 0.03 ms (identical)
• Mounting Type: Through Hole (identical)
• Termination Style: Axial (identical)
• Length - Overall: 1.811" (46.00mm) (identical)
• Size - Body: 0.100" Dia x 0.591" L (identical)
• Operating Temperature: -55°C ~ 125°C (identical)
• Current - Carry: 2.5A (DC) (identical)
• Capacitance: 0.25 pF (identical)
• REACH Status: REACH Unaffected (identical)

Parameter Difference: The primary difference is the Operate Range specification: RI-03A operates at 18 ~ 32 AT, while RI-03GP2025 operates at 20 ~ 25 AT. The RI-03GP2025 operate range is a subset of the RI-03A range, making it suitable for applications within the 20 ~ 25 AT window.

Parameter Comparison

Engineering Selection Recommendations

The RI-03GP2025 is the active equivalent substitute for the obsolete RI-03A within the Comus International RI-03 series. Both components maintain identical electrical switching characteristics (500mA AC/DC, 140V AC / 200V DC), power rating (10W), timing specifications (0.25ms operate / 0.03ms release), and mechanical form factor (through-hole axial mounting, 46.00mm overall length).

The RI-03GP2025 carries ROHS3 compliance certification compared to the RoHS compliant status of the RI-03A, representing enhanced environmental regulatory alignment. Both components maintain REACH Unaffected status and MSL 1 (Unlimited) moisture sensitivity classification.

The sole parameter differentiation is the operate range specification. The RI-03A operates within 18 ~ 32 AT, while the RI-03GP2025 operates within 20 ~ 25 AT. Applications operating within the 20 ~ 25 AT window achieve direct functional equivalence. Applications requiring operation below 20 AT or above 25 AT may require alternative component evaluation.

The RI-03GP2025 is currently in Active product status with documented inventory availability (8705 Pcs), ensuring sustained supply chain support for new designs and design revision activities.

Frequently Asked Questions (FAQ)

Q: Can RI-03GP2025 directly replace RI-03A in all applications? A: Direct replacement is viable for applications operating within the 20 ~ 25 AT operate range. If your application requires operation below 20 AT or above 25 AT, alternative component evaluation is necessary.

Q: What are the key electrical parameters that determine substitution compatibility? A: Substitution compatibility is determined by matching circuit configuration (SPST-NO), switching current capacity (500mA AC/DC), switching voltage ratings (140V AC / 200V DC), rated power (10W), and operate/release timing characteristics (0.25ms / 0.03ms).

Q: Does the RI-03GP2025 maintain identical mechanical mounting? A: Both components share identical mounting specifications: through-hole mounting type, axial termination style, 1.811" (46.00mm) overall length, and 0.100" diameter x 0.591" length body dimensions.

Q: What is the significance of the RoHS compliance difference? A: The RI-03A carries RoHS Compliant certification, while RI-03GP2025 carries ROHS3 Compliant certification. ROHS3 represents current regulatory alignment. Both components are REACH Unaffected and MSL 1 classified.

Q: What is the operating temperature range for both components? A: Both RI-03A and RI-03GP2025 operate within -55°C ~ 125°C temperature range, providing identical thermal specifications for environmental design consideration.

Q: Why is RI-03A classified as Obsolete? A: Product status reflects manufacturer production status. The RI-03GP2025 Active classification indicates current manufacturing availability and is the recommended specification for new design activity.