RI-90GP1030 Glass Body Reed Switch SPDT Equivalent & Substitute Parts

Part Overview

The RI-90GP1030 is a glass body reed switch manufactured by Comus International with SPDT (Single Pole Double Throw) circuit configuration. This component operates across a 10–30AT (ampere-turn) range with 280mA AC and 400mA DC switching capability at 125V AC and 175V DC ratings. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design requirements and component availability in applications currently using this switch.

Key Parameters

Parameter	Value
Manufacturer Part Number	RI-90GP1030
Manufacturer	Comus International
Type	Glass Body Reed
Circuit Configuration	SPDT
Operate Range	10–30AT
Current – Switching (AC/DC)	280mA (AC) / 400mA (DC)
Voltage – Switching AC	125V
Voltage – Switching DC	175V
Power – Rated	5W
Mounting Type	Through Hole
Termination Style	Axial
Operating Temperature Range	–55°C to 125°C
Product Status	Obsolete
RoHS Status	RoHS Compliant

Substitute Part Grouping Explanation

Substitute parts for the RI-90GP1030 must satisfy the following electrical and mechanical criteria:

Circuit Configuration: SPDT configuration is required for direct substitution to maintain functional compatibility within existing designs.

Current Capacity: Switching current ratings must support the application's maximum current draw. The RI-90GP1030 accommodates 280mA AC and 400mA DC. Substitutes with higher current ratings (350mA AC / 500mA DC) provide operational margin and are acceptable; lower ratings do not qualify.

Voltage Ratings: AC and DC voltage switching capabilities must meet or exceed the original 125V AC and 175V DC specifications to ensure safe operation across the intended voltage envelope.

Operate Range (Ampere-Turn): The AT range determines the magnetic field strength required to actuate the switch. Substitutes must align with the designed activation threshold of the application. The RI-90GP1030 operates across 10–30AT; narrower ranges (e.g., 15–20AT, 27–33AT) are substitutes for specific application sub-categories.

Power Rating: The 5W power rating defines thermal and switching capacity. Equivalents must maintain this rating or higher.

Mounting and Termination: Through-hole axial termination is required for PCB compatibility.

Regulatory Compliance: All substitutes must satisfy RoHS and REACH requirements for end-market acceptance.

Substitutes are grouped into two categories:

Category A – Direct Functional Equivalents (Same Circuit, Comus International RI-90 Series) The RI-90GP1520 is a SPDT switch from the same series with identical electrical performance (280mA AC / 400mA DC at 125V AC / 175V DC), 5W power rating, and through-hole axial termination. It differs only in operate range (15–20AT vs. 10–30AT) and is active in production with 11,604 pcs inventory.

Category B – Cross-Manufacturer Substitutes (Circuit or Electrical Variances) Littelfuse MDRR-DT and HA15-2 series switches offer functional substitution with trade-offs in circuit configuration, current capacity, or operate range. MDRR-DT parts retain SPDT configuration but with lower current (180mA AC / 250mA DC at 120V AC) and narrower operate ranges. HA15-2 parts increase current capacity to 350mA AC / 500mA DC and voltage to 265V AC but use SPST-NO (Single Pole Single Throw) configuration, which requires circuit redesign.

Parameter Comparison

Parameter	RI-90GP1030	RI-90GP1520	MDRR-DT-10-15-F	MDRR-DT-15-20-F	HA15-2-22-38	HA15-2-27-33	HA15-2-27-38	HA15-2-32-38	HA15-2-42-48
Manufacturer	Comus International	Comus International	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.
Type	Glass Body Reed	Glass Body Reed	Glass Body Reed	Glass Body Reed	Glass Body Reed	Glass Body Reed	Glass Body Reed	Glass Body Reed	Glass Body Reed
Circuit	SPDT	SPDT	SPDT	SPDT	SPST-NO	SPST-NO	SPST-NO	SPST-NO	SPST-NO
Operate Range	10–30AT	15–20AT	10–15AT	15–20AT	22–38AT	27–33AT	27–38AT	32–38AT	42–48AT
Current – Switching AC	280mA	280mA	180mA	180mA	350mA	350mA	350mA	350mA	350mA
Current – Switching DC	400mA	400mA	250mA	250mA	500mA	500mA	500mA	500mA	500mA
Voltage – Switching AC	125V	125V	120V	120V	265V	265V	265V	265V	265V
Voltage – Switching DC	175V	175V	175V	175V	200V	200V	200V	200V	200V
Power – Rated	5W	5W	5W	5W	10W	10W	10W	10W	10W
Operate Time	1 ms	1 ms	0.7 ms	0.7 ms	0.6 ms	0.6 ms	0.6 ms	0.6 ms	0.6 ms
Release Time	1 ms	1 ms	1 ms	1 ms	0.2 ms	0.2 ms	0.2 ms	0.2 ms	0.2 ms
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Termination Style	Axial	Axial	Axial	Axial	Axial	Axial	Axial	Axial	Axial
Operating Temperature Range	–55°C to 125°C	–55°C to 125°C	–40°C to 125°C	–40°C to 125°C	–20°C to 125°C	–20°C to 125°C	–20°C to 125°C	–20°C to 125°C	–20°C to 125°C
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Current – Carry (DC)	500mA	500mA	1.5A	1.5A	1.5A	1.5A	1.5A	1.5A	1.5A
Inventory Status	1,019 pcs	11,604 pcs	13,300 pcs	3,400 pcs	1,083 pcs	1,607 pcs	649 pcs	1,970 pcs	1,266 pcs

Engineering Selection Recommendations

RI-90GP1520 (Recommended Primary Substitute) The RI-90GP1520 is the optimal substitute for the obsolete RI-90GP1030. Both are SPDT glass body reed switches from the Comus International RI-90 series with identical electrical specifications (280mA AC / 400mA DC, 125V AC / 175V DC, 5W), matching operating temperature range (–55°C to 125°C), and compatible through-hole axial termination. The only difference is the operate range (15–20AT vs. 10–30AT), which applies only to applications requiring activation within the broader 10–30AT window. The RI-90GP1520 is active with high inventory availability (11,604 pcs) and carries ROHS3 compliance, ensuring regulatory alignment for new designs and production runs.

MDRR-DT Series (Limited Substitution) Littelfuse MDRR-DT-10-15-F and MDRR-DT-15-20-F retain SPDT configuration and 5W power rating with through-hole axial mounting. Both are suitable only for applications tolerating reduced switching current (180mA AC / 250mA DC) and slightly lower AC voltage (120V vs. 125V). These parts are active with substantial inventory and ROHS3 compliance. The MDRR-DT-15-20-U variant offers box packaging as an alternative to bulk.

HA15-2 Series (Circuit Configuration Trade-Off) Littelfuse HA15-2 switches (22–38AT through 42–48AT variants) provide higher current capacity (350mA AC / 500mA DC) and voltage ratings (265V AC) with reduced switching and release times. However, all HA15-2 variants use SPST-NO (Single Pole Single Throw) configuration instead of SPDT, fundamentally altering circuit topology. These switches are suitable only for applications where the contact closure function of the original SPDT is not required or where circuit redesign is feasible. All HA15-2 variants are active with ROHS3 compliance and inventory availability ranging from 649 to 1,970 pcs.

Compliance and Regulatory Status All active substitute parts carry ROHS3 compliance and REACH Unaffected status, meeting current regulatory requirements for electronic component sourcing across regulated markets. The obsolete RI-90GP1030 status necessitates migration to active alternatives; the RI-90GP1520 presents the lowest design risk due to electrical and functional equivalence.

Frequently Asked Questions (FAQ)

Q: Can I use the RI-90GP1520 as a direct replacement for RI-90GP1030?

A: Yes, without circuit modifications. Both components feature SPDT configuration, identical switching current ratings (280mA AC / 400mA DC), and matching voltage specifications (125V AC / 175V DC). The operate range differs (RI-90GP1520 is 15–20AT vs. RI-90GP1030 at 10–30AT), which affects only the magnetic activation threshold. For designs requiring operation across the full 10–30AT window, verify that the narrower 15–20AT range meets the application's magnetic field specification.

Q: What is the operate range (AT), and why does it matter?

A: Ampere-turn (AT) is a measure of magnetic field strength required to actuate the reed switch. Different application designs employ different electromagnets or magnet positioning, creating varying AT values. Substituting a switch with a different AT range may prevent activation in the original application unless the magnetic field matches the substitute's activate threshold.

Q: Can I substitute an HA15-2 series switch for the RI-90GP1030?

A: Only if your circuit design accommodates SPST-NO (Single Pole Single Throw) configuration instead of SPDT (Single Pole Double Throw). The HA15-2 provides only one switched output (normally open contact), whereas the RI-90GP1030 provides two outputs (one normally open, one normally closed). This requires circuit redesign and cannot be used as a drop-in replacement. However, HA15-2 switches offer superior current capacity (350mA AC / 500mA DC) and voltage ratings (265V AC), making them suitable for high-current applications where circuit modification is acceptable.

Q: Are Littelfuse MDRR-DT switches compatible with RI-90GP1030 applications?

A: MDRR-DT switches are electrically compatible only for applications with lower current demands (180mA AC maximum vs. 280mA AC for RI-90GP1030). Both retain SPDT configuration. Verify that your design current does not exceed 180mA AC or 250mA DC. Note that MDRR-DT variants operate at 120V AC instead of 125V AC, a 4% reduction suitable for most AC-powered designs but potentially marginal in voltage-critical applications.

Q: What packaging options are available?

A: RI-90GP1520 is supplied in Bulk packaging. MDRR-DT-10-15-F and MDRR-DT-15-20-F are supplied in Bulk; alternative Box packaging is available as MDRR-DT-10-15-U and MDRR-DT-15-20-U variants. All HA15-2 series switches are supplied in Box packaging. Packaging selection affects procurement minimum quantities and handling; verify packaging alignment with manufacturing or assembly requirements.

Q: Which substitute has the best inventory availability?

A: MDRR-DT-10-15-F offers the highest inventory at 13,300 pcs, followed by MDRR-DT-15-20-U at 13,400 pcs. RI-90GP1520 is available in 11,604 pcs. HA15-2 variants range from 649 pcs (HA15-2-27-38) to 1,970 pcs (HA15-2-32-38). For procurement planning, RI-90GP1520 remains the recommended substitute due to electrical equivalence, despite slightly lower inventory than MDRR-DT alternatives.

Q: Does the operating temperature range affect substitution?

A: Yes, if the application operates outside standard ranges. The RI-90GP1030 and RI-90GP1520 operate across –55°C to 125°C. MDRR-DT switches operate across –40°C to 125°C, reducing the low-temperature limit by 15°C. HA15-2 switches operate across –20°C to 125°C, reducing the low-temperature limit by 35°C. For applications requiring operation below –40°C, only RI-90GP1520 is suitable; for applications below –20°C, MDRR-DT is acceptable as long as current ratings are satisfied.

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