MITI-3V1-6-15 Glass Body Reed Switch Equivalent & Substitute Parts

Part Overview

The MITI-3V1-6-15 is a glass body reed switch manufactured by Littelfuse Inc., configured as a single-pole single-throw normally open (SPST-NO) device. This component is rated for 250mA DC switching at 170V DC with a 10W power rating and operates within a 6–15AT magnetic field range. The part is currently listed as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

MITI-3V1-6-15

Littelfuse Inc.In Stock: 770MITI-3V1-6-15 Datasheet

Current PartRFQ

MITI-7-6-15

Littelfuse Inc.In Stock: 1002MITI-7-6-15 Datasheet

DirectRFQ

MITI-3-7-15

Littelfuse Inc.In Stock: 985MITI-3-7-15 Datasheet

MFR RecommendedRFQ

RI-70GP1015

Comus InternationalIn Stock: 29111RI-70GP1015 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-3V1-6-15 is determined by the following critical parameters:

• Circuit Configuration: Must be SPST-NO
• Mounting Type: Must be Through Hole with Axial termination
• Current Switching Capability: Must support minimum 250mA DC
• Voltage Switching Capability: Must support minimum 170V DC
• Power Rating: Must support minimum 10W
• Operate Range: Must encompass or overlap the 6–15AT range
• Compliance: RoHS3 compliance required

The substitute parts identified meet these criteria with the following considerations:

• MITI-7-6-15 (Littelfuse Inc.): Maintains identical operate range (6–15AT), supports 250mA DC at 170V DC, and meets RoHS3 compliance. Shorter overall length (40.39mm vs. 46.00mm).
• MITI-3-7-15 (Littelfuse Inc.): Operates within 7–15AT range (narrower lower bound), supports 250mA DC but at reduced voltage (100V DC). Shorter overall length (31.24mm). Active product status.
• RI-70GP1015 (Comus International): Operates within 10–15AT range (narrower lower bound), supports 500mA AC/DC at 170V DC with 10W rating. Identical physical dimensions. Active product status.
• KSK-1A80-1015 (Standex-Meder Electronics): Operates within 10–15AT range (narrower lower bound), supports 500mA AC/DC at 170V DC with 10W rating. Shorter overall length (35.80mm). Active product status.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: MITI-7-6-15

The MITI-7-6-15 from Littelfuse Inc. provides the closest functional match to the obsolete MITI-3V1-6-15. Both devices maintain identical operate range (6–15AT), support 250mA DC switching at 170V DC, and are RoHS3 compliant. The MITI-7-6-15 is an active product with current manufacturing support. The reduced overall length (40.39mm versus 46.00mm) may require PCB layout verification but does not affect electrical performance.

Secondary Substitute: RI-70GP1015

The RI-70GP1015 from Comus International is suitable for applications where higher switching current capacity (500mA AC/DC) is acceptable or beneficial. This device maintains identical physical dimensions (1.811" / 46.00mm) and DC voltage rating (170V), with 10W power rating matching the original specification. The narrower operate range (10–15AT versus 6–15AT) restricts activation to higher magnetic field strengths. Active product status and RoHS3 compliance are confirmed.

Tertiary Substitute: KSK-1A80-1015

The KSK-1A80-1015 from Standex-Meder Electronics offers 500mA AC/DC switching capability at 170V DC with 10W power rating. The narrower operate range (10–15AT) and shorter overall length (35.80mm) require application-specific evaluation. Active product status and RoHS3 compliance are confirmed. Extended operating temperature range (−40°C to 130°C) provides additional thermal margin.

Not Recommended: MITI-3-7-15

The MITI-3-7-15 exhibits reduced power rating (3W versus 10W) and lower DC voltage capability (100V versus 170V), making it unsuitable as a direct substitute for the MITI-3V1-6-15 in applications requiring the full 10W/170V specification.

Frequently Asked Questions (FAQ)

Q: Can MITI-7-6-15 be used as a direct replacement for MITI-3V1-6-15?

A: Yes. Both devices share identical circuit configuration (SPST-NO), operate range (6–15AT), switching current (250mA DC), and DC voltage rating (170V). The MITI-7-6-15 is an active product with current manufacturing availability. PCB layout verification is recommended due to the 5.61mm reduction in overall length.

Q: What is the significance of the operate range specification?

A: The operate range (measured in Ampere-Turns, AT) defines the magnetic field strength required to activate the reed switch. A narrower operate range (such as 10–15AT versus 6–15AT) means the device requires a stronger magnetic field for activation. Applications using weaker magnets may not function reliably with substitutes having higher minimum AT values.

Q: Are the RI-70GP1015 and KSK-1A80-1015 suitable for 250mA DC applications?

A: Yes. Both devices support 500mA AC/DC switching, which exceeds the 250mA DC requirement of the MITI-3V1-6-15. However, the narrower operate range (10–15AT) must be verified against the magnetic field strength in the target application.

Q: Does the reduced overall length of substitute parts affect circuit performance?

A: Overall length does not affect electrical performance. Physical dimensions must be verified against PCB layout constraints, mounting clearances, and connector spacing in the target application.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All identified substitute parts carry RoHS3 compliance certification, matching the compliance status of the original MITI-3V1-6-15.

Q: What is the difference between AC and DC current ratings?

A: The MITI-3V1-6-15 is rated for 250mA DC only. Substitute parts rated for AC/DC (such as RI-70GP1015 and KSK-1A80-1015) can switch both AC and DC loads at the specified current levels. This provides design flexibility without compromising DC performance.