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TE Connectivity ALCOSWITCH 1478620-2 Equivalent & Substitute Parts
Part Overview
The TE Connectivity ALCOSWITCH 1478620-2 is a snap-action switch with SPST-NO (Single Pole Single Throw - Normally Open) circuit configuration, rated for 16A at 125V AC. This component features a straight lever actuator and chassis mount termination with 0.250" (6.3mm) quick connect terminals. The part is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing applications and new designs.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | 1478620-2 |
| Manufacturer | TE Connectivity ALCOSWITCH Switches |
| Circuit Configuration | SPST-NO |
| Switch Function | Off-Mom (Momentary) |
| Current Rating (AC) | 16A |
| Voltage Rating (AC) | 125V |
| Actuator Type | Lever, Straight |
| Mounting Type | Chassis Mount |
| Termination Style | Quick Connect - 0.250" (6.3mm) |
| Operating Temperature Range | -20°C to 130°C |
| Electrical Life | 100,000 Cycles |
| Mechanical Life | 10,000,000 Cycles |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution of the 1478620-2 is determined by the following critical parameters:
Primary Compatibility Criteria:
- Circuit configuration: SPST-NO
- Switch function: Off-Mom (momentary)
- Mounting type: Chassis mount
- Termination style: Quick Connect - 0.250" (6.3mm)
- Voltage rating: 125V AC minimum
Secondary Compatibility Criteria:
- Current rating: 16A AC or higher
- Operating temperature range: Must encompass or exceed -20°C to 130°C
- Electrical life: 100,000 cycles or greater
- Mechanical life: 10,000,000 cycles or greater
Substitute parts are grouped into three categories based on current rating alignment:
Category 1: Direct Current Rating Match (15A-16A at 125V) Parts with current ratings between 15A and 16A at 125V AC provide the closest functional equivalence to the original component.
Category 2: Higher Current Rating (20A-25A at 125V or 277V) Parts with elevated current ratings accommodate applications requiring higher switching capacity while maintaining 125V or 277V voltage compatibility.
Category 3: Lower Current Rating (6A at 125V) Parts with reduced current ratings are suitable only for applications with lower current demands than the original specification.
Parameter Comparison
| Part Number | Manufacturer | Current Rating (AC) | Voltage Rating (AC) | Actuator Type | Termination | Operating Temp Range | Electrical Life | Mechanical Life | Product Status |
|---|---|---|---|---|---|---|---|---|---|
| 1478620-2 | TE Connectivity ALCOSWITCH | 16A | 125V | Lever, Straight | QC 0.250" | -20°C to 130°C | 100,000 | 10,000,000 | Obsolete |
| LS0851501F160C2C | E-Switch | 15A | 125V | Lever, Straight | QC 0.250" | -25°C to 85°C | 50,000 | 1,000,000 | Active |
| V7-1C27D8-000-1 | Honeywell Sensing and Productivity Solutions | 15A | 125V | Round (Pin Plunger) | QC 0.187" | -40°C to 85°C | 100,000 | 10,000,000 | Obsolete |
| V7-1C28E9 | Honeywell Sensing and Productivity Solutions | 15A | 125V | Round (Pin Plunger) | QC 0.250" | -40°C to 85°C | 100,000 | 10,000,000 | Active |
| V7-1K20E9 | Honeywell Sensing and Productivity Solutions | 22A | 125V | Round (Pin Plunger) | QC 0.250" | -40°C to 85°C | 100,000 | 10,000,000 | Active |
| V7-1V20E9-000-1 | Honeywell Sensing and Productivity Solutions | 21A | 125V | Round (Pin Plunger) | QC 0.250" | -40°C to 85°C | 100,000 | 10,000,000 | Active |
| V7-1X2AD9C2 | Honeywell Sensing and Productivity Solutions | 6A | 125V | Round (Pin Plunger) | QC 0.250" | -40°C to 85°C | Not Specified | 10,000,000 | Active |
| V7-1Y29E9 | Honeywell Sensing and Productivity Solutions | 20A | 277V | Round (Pin Plunger) | QC 0.250" | -40°C to 85°C | 100,000 | 10,000,000 | Obsolete |
| V7-1Z20E9 | Honeywell Sensing and Productivity Solutions | 25A | 277V | Round (Pin Plunger) | QC 0.250" | -40°C to 85°C | 100,000 | 10,000,000 | Active |
| V7-1Z23E9 | Honeywell Sensing and Productivity Solutions | 25A | 277V | Round (Pin Plunger) | QC 0.250" | -40°C to 150°C | 100,000 | 10,000,000 | Active |
| V7-1Z29E9 | Honeywell Sensing and Productivity Solutions | 25A | 277V | Round (Pin Plunger) | QC 0.250" | -40°C to 85°C | 100,000 | 10,000,000 | Active |
Engineering Selection Recommendations
Primary Substitute: V7-1C28E9
The Honeywell V7-1C28E9 is the recommended primary substitute for the 1478620-2. This part maintains electrical equivalence with 15A at 125V AC rating, identical termination style (0.250" quick connect), and active product status. The V7-1C28E9 provides 100,000 electrical cycles and 10,000,000 mechanical cycles, matching the original specification. RoHS compliance and unlimited moisture sensitivity level (MSL 1) provide enhanced environmental qualification. The operating temperature range of -40°C to 85°C encompasses the lower end of the original specification, with the exception of the upper temperature limit (85°C versus 130°C).
Secondary Substitutes: V7-1K20E9 and V7-1V20E9-000-1
The Honeywell V7-1K20E9 (22A at 125V) and V7-1V20E9-000-1 (21A at 125V) are suitable for applications requiring higher current capacity than the original 16A rating. Both parts feature active product status, identical termination style, and equivalent electrical and mechanical life specifications. These components are appropriate for designs where current margin is required or where the application load exceeds 16A.
Alternative Substitute: LS0851501F160C2C
The E-Switch LS0851501F160C2C provides 15A at 125V with matching termination and active product status. This part features a straight lever actuator identical to the original component. However, the electrical life rating of 50,000 cycles and mechanical life of 1,000,000 cycles are substantially lower than the original specification. This substitute is suitable only for applications with reduced cycle requirements.
Not Recommended: V7-1X2AD9C2
The V7-1X2AD9C2 is rated for only 6A at 125V, providing insufficient current capacity for applications designed for the 16A original component. This part is suitable only for applications with significantly reduced current demands.
Not Recommended: 277V Rated Parts
The V7-1Y29E9, V7-1Z20E9, V7-1Z23E9, and V7-1Z29E9 are rated for 277V AC operation. These parts are not suitable substitutes for 125V applications unless the circuit design is modified to accommodate the higher voltage rating.
Not Recommended: V7-1C27D8-000-1
The V7-1C27D8-000-1 features a different termination style (0.187" quick connect versus 0.250" required) and is classified as obsolete. This part is not suitable for direct substitution.
Frequently Asked Questions (FAQ)
Q: Can the V7-1C28E9 be used as a direct replacement for the 1478620-2?
A: The V7-1C28E9 is electrically compatible with the 1478620-2 for 125V AC applications at 15A. Both parts feature SPST-NO circuit configuration, momentary switch function, chassis mount, and 0.250" quick connect termination. The primary difference is the actuator type: the original uses a straight lever while the V7-1C28E9 uses a round pin plunger. Physical mounting geometry must be verified for the specific application.
Q: Why is the operating temperature range different between the 1478620-2 and substitute parts?
A: The original 1478620-2 specifies -20°C to 130°C operation. Most substitute parts, including the recommended V7-1C28E9, specify -40°C to 85°C. The lower minimum temperature of substitutes provides enhanced cold-weather performance. However, the upper temperature limit of 85°C is lower than the original 130°C specification. Applications requiring operation above 85°C should consider the V7-1Z23E9, which is rated to 150°C.
Q: What is the significance of the electrical life and mechanical life ratings?
A: Electrical life (measured in cycles) indicates the number of switching operations before electrical contact degradation occurs. Mechanical life indicates the number of actuations before mechanical wear becomes significant. The original 1478620-2 specifies 100,000 electrical cycles and 10,000,000 mechanical cycles. The E-Switch LS0851501F160C2C provides only 50,000 electrical cycles and 1,000,000 mechanical cycles, making it unsuitable for high-cycle applications.
Q: Can higher-rated current parts such as the V7-1K20E9 (22A) be used in place of the 16A original?
A: Yes. Higher current-rated switches can be used in applications designed for lower current ratings. The V7-1K20E9 at 22A provides additional current capacity margin and is suitable for applications where the original 16A rating is adequate. The switch will not draw more current than the circuit requires; the higher rating simply provides operational headroom.
Q: Why are the 277V-rated parts not suitable substitutes?
A: The 277V-rated parts (V7-1Y29E9, V7-1Z20E9, V7-1Z23E9, V7-1Z29E9) are designed for higher voltage applications. Using a 277V-rated switch in a 125V circuit is not a compatibility issue from an electrical standpoint, but these parts are optimized for 277V operation and represent unnecessary cost and complexity for 125V applications.
Q: What is the difference between the termination styles listed (0.250" versus 0.187")?
A: The termination style refers to the quick connect terminal size. The original 1478620-2 uses 0.250" (6.3mm) terminals. Most substitute parts maintain this standard. The V7-1C27D8-000-1 uses 0.187" (4.7mm) terminals, which are physically incompatible with 0.250" receptacles. Terminal compatibility must be verified before substitution.
Q: What does "RoHS Compliant" or "RoHS3 Compliant" mean for substitute parts?
A: RoHS (Restriction of Hazardous Substances) compliance indicates that the component meets European Union directives restricting the use of specific hazardous materials. RoHS3 is the current directive version. Most active substitute parts carry RoHS compliance certification, making them suitable for applications with environmental or regulatory requirements. The original 1478620-2 does not specify RoHS status due to its obsolete classification.
Q: Is the actuator type difference (straight lever versus round pin plunger) significant?
A: Yes. The actuator type affects the physical interface and mounting geometry. The original 1478620-2 uses a straight lever actuator, while most Honeywell V7 series substitutes use a round pin plunger. The E-Switch LS0851501F160C2C maintains the straight lever design. Physical space constraints and mechanical linkage requirements must be evaluated for each application.
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