MSL33 Equivalent & Substitute Parts

Part Overview

The MSL33 is an active SP3T slide switch manufactured by APEM Inc., designed for through-hole mounting applications. This switch handles 200mA at 125V AC and 30V DC with non-shorting contact timing. The MSL33 is specified for general-purpose switching applications requiring reliable on-on-on functionality across a wide operating temperature range. Substitute parts are identified to provide alternative sourcing options when the primary part becomes unavailable or when design requirements permit functional equivalents with differing electrical or mechanical characteristics.

Substiute Parts

MSL33

APEM Inc.In Stock: 859MSL33 Datasheet

Current PartRFQ

1825194-1

TE Connectivity ALCOSWITCH SwitchesIn Stock: 8271825194-1 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The MSL33 can be substituted with TE Connectivity ALCOSWITCH part number 1825194-1 based on the following alignment criteria:

Matching Parameters:

• Circuit configuration: Both are SP3T switches
• Switch function: Both provide on-on-on operation
• Voltage rating (AC): Both rated at 125V AC
• Mounting type: Both are through-hole mounted
• Termination style: Both use PC pin termination
• Contact finish: Both feature silver-plated contacts
• Features: Both have epoxy sealed terminals

Differing Parameters: The 1825194-1 operates at 300mA AC (higher current capacity), uses shorting contact timing (MBB vs. BBM), has a lower actuator length (10.16mm vs. 14.20mm), reduced switch travel (2.00mm vs. 4.00mm), higher operating force (600gf vs. 250gf), and extended operating temperature range (-20°C to 85°C vs. -10°C to 60°C). These differences must be evaluated against specific application requirements before substitution.

Parameter Comparison

Engineering Selection Recommendations

The MSL33 maintains active product status with ROHS3 compliance and REACH unaffected classification, making it the preferred choice for applications requiring regulatory alignment with current environmental standards. The 1825194-1 substitute provides higher current capacity (300mA vs. 200mA) and extended temperature range (-20°C to 85°C vs. -10°C to 60°C), suitable for applications operating in more extreme thermal environments or requiring higher switching current. However, the 1825194-1 uses shorting contact timing (MBB) compared to the MSL33's non-shorting timing (BBM), which affects circuit behavior during position transitions. The substitute also exhibits higher operating force (600gf vs. 250gf) and reduced actuator length (10.16mm vs. 14.20mm), requiring mechanical design verification for panel cutout and actuation requirements. Selection between these parts depends on application-specific demands for current capacity, temperature range, contact timing behavior, and mechanical interface constraints.

Frequently Asked Questions (FAQ)

Q: Can the 1825194-1 directly replace the MSL33 in existing designs?

A: Direct replacement requires verification of three critical factors: (1) contact timing compatibility—the 1825194-1 uses shorting (MBB) timing versus the MSL33's non-shorting (BBM) timing, which affects circuit behavior during switching transitions; (2) mechanical fit—the 1825194-1 has a shorter actuator length (10.16mm vs. 14.20mm) and reduced travel distance (2.00mm vs. 4.00mm), requiring panel cutout and mechanical linkage review; (3) operating force—the 1825194-1 requires 600gf versus 250gf for the MSL33, affecting user actuation feel and mechanical design.

Q: What is the difference between shorting (MBB) and non-shorting (BBM) contact timing?

A: Non-shorting (BBM—break before make) contact timing ensures the previous position disconnects before the new position connects, preventing momentary short circuits. Shorting (MBB—make before break) timing establishes the new connection before breaking the previous one, creating a brief overlap. Circuit design must accommodate the timing behavior of the selected switch.

Q: Are both parts suitable for DC applications?

A: The MSL33 is rated for 200mA at 30V DC. The 1825194-1 is specified for 300mA AC only, with no DC voltage rating provided. DC application compatibility for the 1825194-1 must be confirmed with the manufacturer before substitution.

Q: What are the packaging differences?

A: The MSL33 is supplied in standard packaging, while the 1825194-1 is supplied in bulk packaging. Inventory quantities differ: MSL33 has 760 pieces in stock versus 1825194-1 with 766 pieces in stock.

Q: How do the electrical life ratings compare?

A: The MSL33 is rated for 10,000 electrical cycles, while the 1825194-1 is rated for 15,000 electrical cycles, indicating longer operational life for the substitute part under specified conditions.