RI-07AA Equivalent & Substitute Parts

Part Overview

The RI-07AA is a Glass Body Reed Switch manufactured by Comus International, classified as SPST-NO (Single Pole Single Throw Normally Open) with a 500mA switching capacity at 140V AC and 200V DC. This through-hole mounted component is rated for 10W power dissipation with an operating range of 16–25AT and is designed for general-purpose switching applications requiring reliable, sealed contact operation.

The RI-07AA is designated as Obsolete product status. Identification of equivalent and substitute parts is necessary to ensure design continuity, maintain system functionality, and meet current compliance and inventory requirements for new production and maintenance applications.

Key Parameters

Parameter	RI-07AA
Manufacturer	Comus International
Series	RI-07
Circuit Configuration	SPST-NO
Type	Glass Body Reed
Operate Range	16–25 AT
Release Range	4–18 AT
Current - Switching (AC/DC)	500 mA
Voltage - Switching (AC)	140 V
Voltage - Switching (DC)	200 V
Power - Rated	10 W
Mounting Type	Through Hole
Operating Temperature Range	−55°C to 125°C
Current - Carry (DC)	1.75 A
RoHS Status	RoHS Compliant
REACH Status	REACH Unaffected
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution compatibility is determined by the following critical electrical and mechanical parameters: Circuit configuration (SPST-NO), voltage switching specifications (140V AC / 200V DC minimum), current switching capacity (500mA AC/DC minimum), power rating (10W minimum), mounting type compatibility, and operating temperature range overlap (minimum −40°C to 125°C).

All identified substitute parts maintain the SPST-NO circuit configuration and meet or exceed the 140V AC / 200V DC voltage requirements and 500mA switching current specification. Operating temperature ranges must accommodate the application's thermal envelope. Mounting type compatibility is stratified into two groups: Through Hole mounting (RI-07AA mounting type) and Surface Mount variants.

The following substitute parts satisfy these substitution criteria:

Through Hole Mounted Substitutes (Direct Mounting Compatibility):

FLEX-14-20-25 (Littelfuse Inc., FLEX-14 Series)
MDSR-7-10-25 (Littelfuse Inc., MDSR-7 Series)
MDSR-7-15-20 (Littelfuse Inc., MDSR-7 Series)
MLRR-3-17-23 (Littelfuse Inc., MLRR-3 Series)

Surface Mount Substitute (Mounting Type Differs):

RI-07GP-2025 (Comus International, RI-07GP Series)

Parameter Comparison

Parameter	RI-07AA	RI-07GP-2025	FLEX-14-20-25	MDSR-7-10-25	MDSR-7-15-20	MLRR-3-17-23
Manufacturer	Comus International	Comus International	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.
Circuit Configuration	SPST-NO	SPST-NO	SPST-NO	SPST-NO	SPST-NO	SPST-NO
Type	Glass Body Reed	Glass Body Reed	Glass Body Reed	Glass Body Reed	Glass Body Reed	Glass Body Reed
Operate Range (AT)	16–25	20–25	20–25	10–25	15–20	17–23
Current - Switching (AC)	500 mA	500 mA	350 mA	350 mA	350 mA	700 mA
Current - Switching (DC)	500 mA	500 mA	500 mA	500 mA	500 mA	1 A
Voltage - Switching (AC)	140 V	140 V	140 V	140 V	140 V	140 V
Voltage - Switching (DC)	200 V	200 V	200 V	200 V	200 V	200 V
Power - Rated (W)	10	10	10	10	10	20
Operate Time (ms)	0.25	0.45	0.55	0.6	0.6	0.7
Release Time (ms)	0.03	0.03	0.2	0.2	0.2	0.2
Mounting Type	Through Hole	Surface Mount	Through Hole	Through Hole	Through Hole	Through Hole
Operating Temperature Range	−55°C to 125°C	−55°C to 125°C	−40°C to 125°C	−40°C to 125°C	−40°C to 125°C	−40°C to 125°C
Current - Carry (DC)	1.75 A	1.75 A	1 A	800 mA	800 mA	1.2 A
RoHS Status	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
Product Status	Obsolete	Active	Active	Active	Active	Active

Engineering Selection Recommendations

RI-07GP-2025 (Comus International): This substitute maintains manufacturer continuity and identical electrical specifications (500mA AC/DC at 140V AC / 200V DC, 10W rated power). Product status is Active with ROHS3 compliance. Selection is appropriate for applications where surface mount compatibility is acceptable and where the narrower operate range (20–25AT) satisfies the design requirement. The extended operate time (0.45ms vs. 0.25ms) must be evaluated against application switching speed requirements.

FLEX-14-20-25 (Littelfuse Inc.): This part maintains through-hole mounting compatibility and 140V AC / 200V DC voltage specifications with 500mA DC switching current. The AC switching current is reduced to 350mA. Product status is Active with ROHS3 compliance. Selection is appropriate for applications where AC switching current ≤350mA or where DC-dominant switching is the design criterion. The narrower operate range (20–25AT) and operating temperature minimum of −40°C (vs. −55°C for RI-07AA) must be confirmed against application requirements.

MDSR-7-10-25 (Littelfuse Inc.): This substitute provides through-hole mounting and meets DC switching current (500mA) and voltage specifications. The broader operate range (10–25AT) accommodates wider actuation tolerance variation. Product status is Active with ROHS3 compliance. AC switching current is limited to 350mA, and DC carry current is reduced to 800mA. Selection is appropriate where the expanded operate range and through-hole form factor offset the reduced AC current rating.

MDSR-7-15-20 (Littelfuse Inc.): This part maintains through-hole mounting, voltage specifications, and 500mA DC switching current. The narrower operate range (15–20AT) is intermediate between RI-07AA and FLEX-14-20-25 variants. Product status is Active with ROHS3 compliance. AC switching current is 350mA, and DC carry current is 800mA. Selection is appropriate where operate range precision between 15–20AT is required.

MLRR-3-17-23 (Littelfuse Inc.): This substitute exceeds RI-07AA specifications with elevated power rating (20W vs. 10W), higher DC switching current (1A vs. 500mA), and higher AC switching current (700mA vs. 500mA). Through-hole mounting is maintained. Product status is Active with ROHS3 compliance. The operate range (17–23AT) overlaps with RI-07AA. Selection is appropriate for applications requiring enhanced power handling and current capacity within similar actuation range.

Frequently Asked Questions (FAQ)

Q: Can RI-07GP-2025 be used as a direct replacement in PCB designs using RI-07AA? A: RI-07GP-2025 maintains identical electrical specifications and Comus International manufacturing continuity. However, the mounting type differs (Surface Mount vs. Through Hole). Direct replacement requires PCB redesign to accommodate surface mount pads. All electrical parameters remain compatible.

Q: Which substitute part has the closest operate time to RI-07AA? A: RI-07GP-2025 has the closest operate time (0.45ms vs. RI-07AA 0.25ms), followed by FLEX-14-20-25 (0.55ms). All other substitutes have operate times ≥0.6ms. Applications with strict switching speed requirements must evaluate these timing differences.

Q: Are all Littelfuse substitutes rated for AC switching at 500mA? A: No. Littelfuse substitutes (FLEX-14-20-25, MDSR-7-10-25, MDSR-7-15-20, MLRR-3-17-23) are rated for 350mA AC switching, except MLRR-3-17-23 which is rated for 700mA AC. DC switching current across all Littelfuse parts meets or exceeds 500mA.

Q: What is the temperature range limitation for substitutes? A: RI-07AA operates from −55°C to 125°C. All Littelfuse substitutes and RI-07GP-2025 operate from −40°C to 125°C (RI-07GP-2025 matches RI-07AA at −55°C). Applications requiring operation below −40°C must retain RI-07AA or RI-07GP-2025.

Q: Which substitute has the highest current carry capacity? A: RI-07AA and RI-07GP-2025 both support 1.75A DC carry current. MLRR-3-17-23 provides 1.2A, FLEX-14-20-25 provides 1A, and MDSR-7 variants provide 800mA. Applications requiring maximum carry current should prioritize RI-07GP-2025 for active product availability.

Q: Are all parts RoHS and REACH compliant? A: Yes. RI-07AA is RoHS Compliant and REACH Unaffected. All substitute parts are ROHS3 Compliant and REACH Unaffected, meeting current regulatory requirements.

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