TE Connectivity ALCOSWITCH 8-1437577-0 Equivalent & Substitute Parts

Part Overview

The TE Connectivity ALCOSWITCH 8-1437577-0 is a slide switch with DPDT (Double Pole Double Throw) circuit configuration rated for 300mA at 125V AC. This component features a through-hole, right-angle mounting configuration with PC pin termination and epoxy sealed terminals. The switch operates with shorting contact timing (MBB) and an on-on switch function.

The 8-1437577-0 carries an obsolete product status. Identification of equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for legacy equipment utilizing this component.

Key Parameters

Parameter	Value
Circuit Configuration	DPDT
Current Rating (AC)	300mA
Voltage Rating (AC)	125V
Contact Timing	Shorting (MBB)
Switch Function	On-On
Mounting Type	Through Hole, Right Angle
Termination Style	PC Pin
Actuator Length	5.00mm
Contact Material	Copper Alloy
Contact Finish	Silver
Operating Temperature Range	-10°C to 60°C
Mechanical Life	10,000 Cycles
Operating Force	250gf
Switch Travel	2.50mm

Substitute Part Grouping Explanation

Substitution of the obsolete 8-1437577-0 is determined by strict equivalence across all critical electrical and mechanical parameters. The substitute part must satisfy the following criteria:

Electrical Parameters:

DPDT circuit configuration
300mA AC current rating
125V AC voltage rating
Shorting contact timing (MBB)
On-on switch function

Mechanical Parameters:

Through-hole, right-angle mounting type
PC pin termination style
5.00mm actuator length
2.50mm switch travel
250gf operating force
10,000 cycle mechanical life rating

Material Specifications:

Copper alloy contact material
Silver contact finish
Polyoxymethylene (Acetal) actuator material
Epoxy sealed terminals

The substitute part TE Connectivity ALCOSWITCH 1825166-1 meets all specified parameters and provides functional and mechanical equivalence to the original component.

Parameter Comparison

Parameter	8-1437577-0 (Original)	1825166-1 (Substitute)
Manufacturer	TE Connectivity ALCOSWITCH Switches	TE Connectivity ALCOSWITCH Switches
Series	STSA	STSA
Product Status	Obsolete	Active
Circuit Configuration	DPDT	DPDT
Contact Timing	Shorting (MBB)	Shorting (MBB)
Switch Function	On-On	On-On
Current Rating (AC)	300mA	300mA
Voltage Rating (AC)	125V	125V
Actuator Type	Standard	Standard
Actuator Length	5.00mm	5.00mm
Contact Material	Copper Alloy	Copper Alloy
Contact Finish	Silver	Silver
Mounting Type	Through Hole, Right Angle	Through Hole, Right Angle
Termination Style	PC Pin	PC Pin
Features	Epoxy Sealed Terminals	Epoxy Sealed Terminals
Operating Temperature	-10°C to 60°C	-10°C to 60°C
Actuator Material	Polyoxymethylene (Acetal) (POM)	Polyoxymethylene (Acetal) (POM)
Switch Travel	2.50mm	2.50mm
Mechanical Life	10,000 Cycles	10,000 Cycles
Operating Force	250gf	250gf
ECCN	EAR99	EAR99
HTSUS	8536.50.9050	8536.50.9050

Engineering Selection Recommendations

The TE Connectivity ALCOSWITCH 1825166-1 is the direct substitute for the obsolete 8-1437577-0. Both components are manufactured by TE Connectivity within the STSA series and share identical electrical ratings, mechanical specifications, and physical dimensions.

The primary distinction between the two parts is product status: the original 8-1437577-0 is obsolete, while the 1825166-1 maintains active product status. This status difference ensures continued availability, manufacturing support, and supply chain reliability for the 1825166-1.

Both components carry identical export classification (EAR99) and tariff codes (8536.50.9050), indicating equivalent regulatory treatment. The 1825166-1 is suitable for direct replacement in applications currently utilizing the 8-1437577-0 without modification to circuit design, PCB layout, or assembly procedures.

Frequently Asked Questions (FAQ)

Q: Can the 1825166-1 be used as a direct replacement for the 8-1437577-0 in existing designs?

A: Yes. The 1825166-1 provides complete functional and mechanical equivalence. All electrical parameters, physical dimensions, mounting configuration, and termination style are identical. No design modifications are required.

Q: Are there differences in contact material or finish between these parts?

A: No. Both components utilize copper alloy contact material with silver finish, ensuring identical electrical performance and contact reliability.

Q: What is the significance of the product status difference?

A: The 8-1437577-0 is classified as obsolete, indicating discontinued manufacturing. The 1825166-1 maintains active status, ensuring ongoing availability from TE Connectivity and continued manufacturing support.

Q: Do both parts have the same mounting footprint?

A: Yes. Both components feature through-hole, right-angle mounting with PC pin termination. PCB layout and assembly procedures remain unchanged.

Q: Are the operating temperature ranges identical?

A: Yes. Both parts operate across the -10°C to 60°C temperature range with identical mechanical life ratings of 10,000 cycles.

Q: What is the mechanical life expectancy for these switches?

A: Both components are rated for 10,000 mechanical cycles at the specified 250gf operating force with 2.50mm switch travel.

Q: Are there any compliance or certification differences?

A: Both components carry identical export classification (EAR99) and tariff codes (8536.50.9050). Regulatory treatment is equivalent.

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