MITI-3V1-8-12.5 Glass Body Reed Switch Equivalent & Substitute Parts

Part Overview

The MITI-3V1-8-12.5 is a glass body reed switch manufactured by Littelfuse Inc., configured as a single-pole single-throw normally open (SPST-NO) contact arrangement. This component is rated for 250mA DC switching at 170V DC with a 10W power rating and operates within an 8–12AT magnetic field range. The part is currently classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing system support and new designs.

Substiute Parts

MITI-3V1-8-12.5

Littelfuse Inc.In Stock: 812MITI-3V1-8-12.5 Datasheet

Current PartRFQ

MITI-7-8-12.5

Littelfuse Inc.In Stock: 798MITI-7-8-12.5 Datasheet

DirectRFQ

RI-70GP0710

Comus InternationalIn Stock: 41859RI-70GP0710 Datasheet

DirectRFQ

KSK-1A80-1015

Standex-Meder ElectronicsIn Stock: 2104KSK-1A80-1015 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MITI-3V1-8-12.5 is determined by the following critical parameters:

• Circuit Configuration: Must be SPST-NO
• Mounting Type: Must be Through Hole with Axial termination
• Operate Range: Must encompass or closely align with 8–12AT
• Current Switching Capacity: Must support minimum 250mA DC
• Voltage Switching Capacity: Must support minimum 170V DC
• Power Rating: Must support minimum 10W
• RoHS Compliance: Must maintain ROHS3 Compliant status

Three substitute parts meet these criteria with varying degrees of parameter alignment:

1. MITI-7-8-12.5 (Littelfuse Inc.) – Same manufacturer, identical operate range, same circuit and mounting configuration
2. RI-70GP0710 (Comus International) – Higher current capacity, extended temperature range, slightly different operate range
3. KSK-1A80-1015 (Standex-Meder Electronics) – Higher current capacity, different operate range, compact form factor

Parameter Comparison

Engineering Selection Recommendations

MITI-7-8-12.5 is the primary substitute for direct replacement applications. It is manufactured by Littelfuse Inc., maintains identical operate range (8–12AT), circuit configuration (SPST-NO), and switching specifications (250mA DC at 170V DC). The part is active in production and ROHS3 compliant. Overall length is reduced to 1.590" (40.39mm) compared to the original 1.811" (46.00mm), which may require PCB layout verification in space-constrained designs.

RI-70GP0710 (Comus International) provides enhanced current capacity (500mA AC/DC) and extended low-temperature operating range (−55°C to 125°C). The operate range shifts to 7–10AT, which overlaps but does not fully encompass the original 8–12AT specification. This part is suitable for applications requiring higher current switching margins or extended cold-temperature operation. Overall length matches the original at 1.811" (46.00mm).

KSK-1A80-1015 (Standex-Meder Electronics) offers the highest current capacity (500mA AC/DC) and the widest operating temperature range (−40°C to 130°C). The operate range is specified as 10–15AT, which does not fully overlap the original 8–12AT range. This part features the most compact form factor at 1.409" (35.80mm) overall length. Selection is appropriate for applications where magnetic field strength is confirmed to be within the 10–15AT range and space constraints are critical.

All three substitutes maintain ROHS3 compliance and are currently in active production status.

Frequently Asked Questions (FAQ)

Q: Can MITI-7-8-12.5 be used as a direct drop-in replacement for MITI-3V1-8-12.5?

A: MITI-7-8-12.5 is functionally equivalent in circuit configuration, switching current (250mA DC), switching voltage (170V DC), and operate range (8–12AT). The primary difference is reduced overall length (1.590" vs. 1.811"). Verify PCB layout and mounting clearances before implementation.

Q: What is the key difference between RI-70GP0710 and the original MITI-3V1-8-12.5?

A: RI-70GP0710 provides doubled switching current capacity (500mA vs. 250mA) and extended low-temperature operation (−55°C vs. −40°C). The operate range is 7–10AT, which does not fully encompass the original 8–12AT specification. Confirm magnetic field strength is within 7–10AT before selection.

Q: Is KSK-1A80-1015 suitable for all applications using MITI-3V1-8-12.5?

A: KSK-1A80-1015 meets or exceeds all electrical specifications (500mA switching current, 170V DC, 10W power rating) and offers the widest temperature range (−40°C to 130°C). However, the operate range is specified as 10–15AT, which does not fully overlap the original 8–12AT range. Selection requires confirmation that the magnetic field strength in the application is within the 10–15AT range.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. MITI-7-8-12.5, RI-70GP0710, and KSK-1A80-1015 are all ROHS3 compliant and suitable for applications with RoHS regulatory requirements.

Q: What is the impact of different overall lengths on PCB design?

A: MITI-7-8-12.5 is 0.221" (5.61mm) shorter than the original. RI-70GP0710 matches the original length. KSK-1A80-1015 is 0.402" (10.20mm) shorter. Verify mounting hole spacing and clearance to adjacent components before PCB layout finalization.

Q: Which substitute offers the fastest switching response?

A: RI-70GP0710 provides the fastest operate time (0.15 ms) and release time (0.03 ms). The original MITI-3V1-8-12.5 operates at 0.45 ms and releases at 0.2 ms. Select RI-70GP0710 for applications requiring rapid switching response.