TE Connectivity ALCOSWITCH 1571990-1 Equivalent & Substitute Parts

Part Overview

The TE Connectivity ALCOSWITCH 1571990-1 is a pushbutton switch with SPST-NO (Single Pole Single Throw - Normally Open) circuit configuration, rated for 0.4VA at 20V AC/DC. This through-hole mounted component features a round plunger actuator with black cap and process-sealed construction. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives for new designs and ongoing production requirements.

Substiute Parts

1571990-1

TE Connectivity ALCOSWITCH SwitchesIn Stock: 9891571990-1 Datasheet

Current PartRFQ

TSPD11FGPCV0

TE Connectivity ALCOSWITCH SwitchesIn Stock: 818TSPD11FGPCV0 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1571990-1 is based on electrical and mechanical compatibility within the TSP series. The primary substitute, TSPD11FGPCV0, shares the following critical parameters with the main part:

• Identical manufacturer (TE Connectivity ALCOSWITCH Switches)
• Same series designation (TSP)
• Matching current rating (0.4VA AC/DC)
• Identical voltage ratings (20V AC and DC)
• Identical mounting type (Through Hole)
• Matching actuator type (Round, Plunger)
• Identical termination style (PC Pin)
• Identical operating temperature range (-30°C to 85°C)
• Process-sealed construction

The TSPD11FGPCV0 differs in circuit configuration (SPDT versus SPST-NO) and electrical life rating (60,000 cycles versus 80,000 cycles). These differences must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The TSPD11FGPCV0 is the manufacturer-recommended substitute for the obsolete 1571990-1. Selection of this alternative is supported by the following factors:

Product Status: The TSPD11FGPCV0 maintains active product status with TE Connectivity ALCOSWITCH Switches, ensuring ongoing availability and manufacturing support. The original 1571990-1 is classified as obsolete, limiting future procurement options.

Electrical Compatibility: Both parts operate within identical voltage and current parameters (0.4VA at 20V AC/DC), permitting direct electrical substitution in applications designed for these ratings.

Mechanical Compatibility: Matching mounting type (Through Hole), actuator configuration (Round, Plunger), and termination style (PC Pin) ensure physical interchangeability on printed circuit boards designed for the original component.

Environmental Specifications: Identical operating temperature range (-30°C to 85°C) and process-sealed construction maintain environmental performance characteristics.

Circuit Configuration Consideration: The substitute part features SPDT (Single Pole Double Throw) circuit configuration compared to the original SPST-NO design. Applications requiring SPST-NO functionality must evaluate whether the additional contact configuration of the SPDT part introduces compatibility issues with existing circuit designs.

Electrical Life Rating: The substitute part specifies 60,000 electrical life cycles versus 80,000 cycles for the original part. Applications with cycle count requirements exceeding 60,000 operations must assess this parameter against actual duty cycle specifications.

Frequently Asked Questions (FAQ)

Q: Can the TSPD11FGPCV0 be used as a direct replacement for the 1571990-1 in all applications?

A: The TSPD11FGPCV0 shares identical electrical ratings, mounting characteristics, and environmental specifications with the 1571990-1. However, the circuit configuration differs (SPDT versus SPST-NO). Direct substitution is possible only in applications where the SPDT configuration does not conflict with existing circuit design requirements.

Q: What is the primary difference between the SPST-NO circuit of the original part and the SPDT circuit of the substitute?

A: SPST-NO (Single Pole Single Throw - Normally Open) provides one contact pair that closes when actuated. SPDT (Single Pole Double Throw) provides two contact pairs, with one closing and one opening simultaneously when actuated. Circuit designs must accommodate this functional difference.

Q: Does the lower electrical life rating of the TSPD11FGPCV0 affect suitability for replacement?

A: The substitute part specifies 60,000 electrical life cycles compared to 80,000 cycles for the original. Suitability depends on application duty cycle requirements. Applications operating below 60,000 cycles are unaffected by this parameter difference.

Q: Are there packaging differences between the original and substitute parts?

A: The original 1571990-1 is specified with packaging designation "-" (not provided). The substitute TSPD11FGPCV0 is supplied in Bulk packaging. Both parts utilize identical PC Pin termination and Through Hole mounting, ensuring physical compatibility on circuit boards.

Q: What is the inventory status of these parts?

A: The original 1571990-1 shows 939 pieces in stock as new original inventory. The substitute TSPD11FGPCV0 shows 724 pieces in stock. Both parts are available for procurement.

Q: Are both parts compliant with RoHS and REACH regulations?

A: Both parts are classified as "Not applicable" for RoHS status and "Vendor Undefined" for REACH status. Both parts carry ECCN classification EAR99 and HTSUS code 8536.50.9031.