FRB2S1520 Equivalent & Substitute Parts

Part Overview

The FRB2S1520 is a Glass Body Reed Switch manufactured by Coto Technology with SPST-NO (Single Pole Single Throw - Normally Open) circuit configuration. This switch is designed for applications requiring low-power switching at up to 500mA and 200V, with an operate range of 15-20AT and rated power of 10VA. The component has been designated as Obsolete, necessitating identification of functionally equivalent alternatives from active manufacturers for continued design support and procurement.

Substiute Parts

FRB2S1520

Coto TechnologyIn Stock: 986FRB2S1520 Datasheet

Current PartRFQ

KSK-1A87-1520

Standex-Meder ElectronicsIn Stock: 2158KSK-1A87-1520 Datasheet

DirectRFQ

MDSR-10-15-20

Littelfuse Inc.In Stock: 4201MDSR-10-15-20 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the FRB2S1520 have been identified based on matching the critical electrical and mechanical parameters that define functional equivalence in reed switch applications:

Primary Substitution Criteria:

• Circuit configuration: SPST-NO
• Operate range: 15-20AT
• Glass body reed type construction
• Switching voltage capability: minimum 200V AC/DC
• Switching current capability: minimum 400mA
• Operating temperature range: minimum -40°C to 125°C
• RoHS/REACH compliance status

Identified Substitutes: The KSK-1A87-1520 (Standex-Meder Electronics, Active) and MDSR-10-15-20 (Littelfuse Inc., Active) meet these core substitution criteria despite variations in mounting type, specific current ratings, and detailed electrical parameters.

Parameter Comparison

Engineering Selection Recommendations

KSK-1A87-1520 (Standex-Meder Electronics)

This substitute is classified as Active with ROHS3 compliance. The switching voltage and temperature range match or exceed FRB2S1520 specifications. The 400mA switching current rating is the primary limitation compared to the original 500mA specification. Mounting type transition from Surface Mount to Through Hole requires PCB redesign consideration. This substitute maintains equivalent electrical functionality for applications operating within the 400mA current ceiling.

MDSR-10-15-20 (Littelfuse Inc.)

This substitute is classified as Active with ROHS3 compliance. The AC voltage rating is reduced to 140V compared to the original 200V AC specification, representing a material reduction in voltage capability for AC applications. DC voltage capability remains at 200V. The component supports 500mA DC switching current, meeting DC-only applications. Through Hole mounting requires PCB redesign. This substitute is suitable for DC-predominant applications or those operating below 140V AC.

Frequently Asked Questions (FAQ)

Q: Why does the FRB2S1520 require a substitute? A: The FRB2S1520 has been designated as Obsolete by Coto Technology, making future procurement difficult. Active substitutes from established manufacturers ensure continued design support and component availability.

Q: Can KSK-1A87-1520 directly replace FRB2S1520 in all applications? A: Direct replacement is limited to applications operating at or below 400mA switching current. The 500mA original specification exceeds the KSK substitute capability. PCB modification is required due to mounting type change from Surface Mount to Through Hole.

Q: What are the voltage limitations when substituting with MDSR-10-15-20? A: The MDSR-10-15-20 reduces AC voltage capability to 140V compared to the original 200V AC. DC applications retain full 200V capability. For AC-circuit applications operating above 140V, this substitute is not functionally equivalent.

Q: Are both substitutes RoHS compliant? A: Yes. Both KSK-1A87-1520 and MDSR-10-15-20 carry ROHS3 compliance certification, matching the RoHS compliance requirement of the original FRB2S1520.

Q: What PCB modifications are necessary for substitution? A: Both substitute parts require Through Hole mounting, whereas the original FRB2S1520 uses Surface Mount configuration. PCB layout modifications to footprint and solder pad geometry are necessary. Consult manufacturer datasheets for specific pad spacing and hole diameter specifications.

Q: Which substitute should be selected for new designs? A: Selection depends on application requirements. For AC applications at 200V, KSK-1A87-1520 is preferred within the 400mA current limit. For DC applications or AC below 140V at 500mA DC, MDSR-10-15-20 provides maximum current capability.