TE Connectivity ALCOSWITCH 1825136-4 Equivalent & Substitute Parts

Part Overview

The TE Connectivity ALCOSWITCH 1825136-4 is a toggle switch with Single Pole Double Throw (SPDT) configuration, rated for 0.4VA at 20V AC/DC. This component features panel mount installation with a flatted actuator and PC pin termination. The part is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements. Substitute parts must maintain functional compatibility while meeting current manufacturing and compliance standards.

Key Parameters

Parameter	Value
Manufacturer Part Number	1825136-4
Manufacturer	TE Connectivity ALCOSWITCH Switches
Series	Gemini A
Product Status	Obsolete
Circuit Configuration	SPDT
Switch Function	On-On
Current Rating	0.4VA (AC/DC)
Voltage Rating - AC	20 V
Voltage Rating - DC	20 V
Mounting Type	Panel Mount
Termination Style	PC Pin
Operating Temperature Range	-30°C ~ 85°C
Electrical Life	6,000 Cycles
RoHS Status	Not applicable

Substitute Part Grouping Explanation

Substitution of the 1825136-4 is based on the following criteria derived from the provided parameters:

Common Substitution Parameters:

Series family: Gemini A (same product line)
Circuit configuration: SPDT (functional equivalence)
Switch function: On-On (operational mode)
Termination style: PC Pin (connection compatibility)
Operating temperature range: -30°C ~ 85°C (environmental specification)
Electrical life: 6,000 Cycles (durability specification)

Substitution Constraints: The substitute part 3-1825136-7 differs in mounting type (Through Hole vs. Panel Mount), current rating (5A vs. 0.4VA), and voltage ratings (120V AC / 28V DC vs. 20V AC/DC). These differences establish distinct application boundaries. The substitute is suitable only for applications where the higher electrical ratings and through-hole mounting are compatible with the circuit design.

Parameter Comparison

Parameter	1825136-4 (Main Part)	3-1825136-7 (Substitute)
Manufacturer	TE Connectivity ALCOSWITCH Switches	TE Connectivity ALCOSWITCH Switches
Series	Gemini A	Gemini A
Product Status	Obsolete	Active
Circuit Configuration	SPDT	SPDT
Switch Function	On-On	On-On
Mounting Type	Panel Mount	Through Hole
Current Rating	0.4VA (AC/DC)	5A (AC/DC)
Voltage Rating - AC	20 V	120 V
Voltage Rating - DC	20 V	28 V
Termination Style	PC Pin	PC Pin
Actuator Type	Flatted	Standard Round
Illumination	Non-Illuminated	Non-Illuminated
Operating Temperature Range	-30°C ~ 85°C	-30°C ~ 85°C
Electrical Life	6,000 Cycles	6,000 Cycles
RoHS Status	Not applicable	ROHS3 Compliant
REACH Status	REACH Affected	REACH Affected
ECCN	EAR99	EAR99

Engineering Selection Recommendations

The 1825136-4 is classified as obsolete and no longer in active production. The substitute part 3-1825136-7 is an active product within the same Gemini A series, offering continued availability and ROHS3 compliance.

Selection Criteria:

The 3-1825136-7 substitute is electrically and functionally compatible with the 1825136-4 for applications operating within the lower voltage and current envelope of the original part (≤20V, ≤0.4A). The substitute's higher electrical ratings (120V AC, 28V DC, 5A) provide design margin and do not create incompatibility when applied to lower-demand circuits.

The primary design consideration is mounting configuration: the substitute requires through-hole PCB mounting rather than panel mount installation. Circuit board layout and mechanical enclosure design must accommodate this difference.

The substitute part includes epoxy sealed terminals and nickel-plated brass actuator material, providing enhanced environmental protection compared to the original part specification. ROHS3 compliance of the substitute aligns with current regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the 3-1825136-7 directly replace the 1825136-4 in existing designs?

A: Functional substitution is possible for circuits operating at or below the original part's electrical ratings (20V, 0.4A). The primary constraint is mounting type: the original part is panel mount while the substitute is through-hole. PCB layout and mechanical design must be modified to accommodate through-hole installation.

Q: What are the key electrical differences between these parts?

A: The 1825136-4 is rated for 0.4VA at 20V AC/DC. The 3-1825136-7 is rated for 5A at 120V AC / 28V DC. Both parts share identical SPDT circuit configuration and On-On switch function. The substitute's higher ratings do not affect compatibility with lower-demand applications.

Q: Are both parts available in the same packaging?

A: No. The 1825136-4 is specified with panel cutout dimensions (Circular - 6.35mm Dia) and 1/4-40 bushing thread for panel mount installation. The 3-1825136-7 is supplied in bulk packaging for through-hole PCB mounting with unthreaded bushing configuration.

Q: What compliance differences exist between the parts?

A: The 1825136-4 has RoHS status listed as "Not applicable." The 3-1825136-7 is ROHS3 compliant. Both parts are REACH affected and classified as EAR99 for export control purposes.

Q: Are the actuator specifications compatible?

A: The 1825136-4 features a flatted actuator (12.29mm length), while the 3-1825136-7 has a standard round actuator (12.19mm length). Actuator geometry differences may affect panel cutout requirements and user interface feel but do not impact electrical function.

Q: What is the operational temperature range for both parts?

A: Both the 1825136-4 and 3-1825136-7 operate across the identical temperature range of -30°C to 85°C.

Q: Do both parts have the same electrical life specification?

A: Yes. Both parts are rated for 6,000 electrical cycles, providing equivalent durability specifications.

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