TE Connectivity ALCOSWITCH 1571921-2 Toggle Switch SPDT Equivalent & Substitute Parts

Part Overview

The TE Connectivity ALCOSWITCH 1571921-2 is a panel-mount toggle switch with Single Pole Double Throw (SPDT) configuration, rated for 6A at 125V AC and 4A at 28V DC. This component features a standard round actuator with epoxy sealed PC pin terminals and operates across a temperature range of -20°C to 80°C. The part is classified as obsolete, necessitating identification of active equivalent components to maintain design continuity and ensure ongoing component availability for production and field service applications.

Substiute Parts

1571921-2

TE Connectivity ALCOSWITCH SwitchesIn Stock: 9811571921-2 Datasheet

Current PartRFQ

MTM106DPC

TE Connectivity ALCOSWITCH SwitchesIn Stock: 904MTM106DPC Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete 1571921-2 is based on electrical and mechanical parameter equivalence within the TE Connectivity ALCOSWITCH MTM Green series. The substitute part MTM106DPC maintains identical electrical specifications including SPDT circuit configuration, 6A AC / 4A DC current ratings, 125V AC / 28V DC voltage ratings, and mechanical compatibility through matching panel cutout dimensions (6.40mm circular), bushing thread specification (1/4-40), and actuator geometry (6.90mm standard round).

The substitution is valid based on the following critical parameters:

• Identical circuit topology (SPDT On-On)
• Matching current and voltage ratings
• Equivalent mechanical mounting interface
• Identical actuator dimensions and type
• Matching termination style (PC Pin)
• Equivalent operating temperature range
• Same electrical life specification (80,000 cycles)
• Identical epoxy sealed terminal feature

Parameter Comparison

Engineering Selection Recommendations

The MTM106DPC is the direct active equivalent for the obsolete 1571921-2. Selection of MTM106DPC is based on the following engineering criteria:

Product Status: The 1571921-2 is classified as obsolete, while MTM106DPC maintains active product status with current manufacturing support and availability.

Electrical Equivalence: Both components share identical electrical specifications across all rated parameters, ensuring functional compatibility in existing circuit designs without modification.

Mechanical Compatibility: Panel mounting interface, actuator geometry, and termination style are identical, permitting direct mechanical substitution in existing panel assemblies.

Regulatory Compliance: Both components carry identical ECCN (EAR99) and HTSUS (8536.50.9065) classifications, maintaining consistent export and tariff treatment.

Compliance Differences: The substitute part MTM106DPC is RoHS non-compliant and REACH Affected, whereas the original part status differs. Design teams must evaluate compliance requirements for their specific application and regulatory jurisdiction.

Frequently Asked Questions (FAQ)

Q: Can MTM106DPC be used as a direct replacement for 1571921-2 in existing designs?

A: Yes. MTM106DPC is electrically and mechanically equivalent to 1571921-2. Both components share identical SPDT circuit configuration, current ratings (6A AC / 4A DC), voltage ratings (125V AC / 28V DC), panel mounting interface, and actuator specifications. Direct substitution is supported without circuit or mechanical redesign.

Q: What are the key electrical parameters that define substitution compatibility?

A: Substitution compatibility is determined by matching circuit configuration (SPDT), switch function (On-On), current ratings (6A AC / 4A DC), voltage ratings (125V AC / 28V DC), operating temperature range (-20°C to 80°C), and electrical life (80,000 cycles). MTM106DPC meets all these specifications identically to 1571921-2.

Q: Are there mechanical differences between these components?

A: No. Both components feature identical mechanical specifications: standard round actuator (6.90mm length), circular panel cutout (6.40mm diameter), 1/4-40 bushing thread, PC pin termination, and epoxy sealed terminals. Panel mounting is directly compatible.

Q: What is the difference in packaging between these parts?

A: The 1571921-2 is supplied in standard packaging, while MTM106DPC is supplied in bulk packaging. This difference affects order quantities and handling but does not impact component functionality or performance.

Q: Are there compliance or regulatory differences I should consider?

A: Yes. MTM106DPC is RoHS non-compliant and REACH Affected, whereas the original 1571921-2 has different compliance status. Design teams must verify that MTM106DPC meets the regulatory requirements for their specific application and target markets before implementation.

Q: What is the inventory status for these components?

A: The 1571921-2 (obsolete) has 910 pieces in stock. The MTM106DPC (active) has 850 pieces in stock. Availability of the active substitute should be confirmed for production planning purposes.

Q: Are both components from the same manufacturer?

A: Yes. Both 1571921-2 and MTM106DPC are manufactured by TE Connectivity ALCOSWITCH Switches and belong to the MTM Green series, ensuring consistent design and quality standards.