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TE Connectivity ALCOSWITCH 1478620-1 Equivalent & Substitute Parts
Part Overview
The TE Connectivity ALCOSWITCH 1478620-1 is a snap-action SPST-NO (Single Pole Single Throw - Normally Open) switch rated for 16A at 125V AC with chassis mount configuration and quick connect 0.250" termination. This component features a round pin plunger actuator and is designed for off-momentary switch function applications.
The 1478620-1 is classified as obsolete. Equivalent and substitute parts are necessary to maintain design compatibility in legacy systems or to transition to active product alternatives that meet the same electrical and mechanical specifications.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | 1478620-1 |
| Manufacturer | TE Connectivity ALCOSWITCH Switches |
| Circuit Configuration | SPST-NO |
| Switch Function | Off-Mom (Off-Momentary) |
| Current Rating (AC) | 16A |
| Voltage Rating (AC) | 125V |
| Actuator Type | Round (Pin Plunger) |
| 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 1478620-1 is determined by the following critical parameters:
Primary Substitution Criteria:
- Circuit configuration (SPST-NO)
- Switch function (Off-Mom)
- Actuator type (Round Pin Plunger)
- Mounting type (Chassis Mount)
- Termination style (Quick Connect - 0.250")
- Voltage rating (125V AC minimum)
- Current rating (16A AC minimum)
Secondary Compatibility Factors:
- Operating temperature range (must encompass or exceed -20°C to 130°C)
- Electrical and mechanical life ratings
- Operating position and travel specifications
- RoHS compliance status
Substitute parts are grouped into two categories:
Category A - Direct Electrical Equivalents (125V AC, 16A or higher): Parts with matching voltage and equal or greater current capacity, identical termination, and compatible mechanical specifications.
Category B - Functional Alternatives (125V AC, lower current ratings): Parts with matching voltage and termination but reduced current capacity, suitable only for applications with lower current requirements than the original 16A specification.
Parameter Comparison
| Part Number | Manufacturer | Current Rating (AC) | Voltage Rating (AC) | Termination Style | Operating Temp Range | Electrical Life | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|---|
| 1478620-1 | TE Connectivity ALCOSWITCH | 16A | 125V | Quick Connect - 0.250" | -20°C to 130°C | 100,000 Cycles | Obsolete | Not Specified |
| V7-1C28E9 | Honeywell Sensing and Productivity Solutions | 15A | 125V | Quick Connect - 0.250" | -40°C to 85°C | 100,000 Cycles | Active | RoHS Compliant |
| V7-1K20E9 | Honeywell Sensing and Productivity Solutions | 22A | 125V | Quick Connect - 0.250" | -40°C to 85°C | 100,000 Cycles | Active | RoHS Compliant |
| V7-1V20E9-000-1 | Honeywell Sensing and Productivity Solutions | 21A | 125V | Quick Connect - 0.250" | -40°C to 85°C | 100,000 Cycles | Active | RoHS Compliant |
| V7-1X2AD9C2 | Honeywell Sensing and Productivity Solutions | 6A | 125V | Quick Connect - 0.250" | -40°C to 85°C | Not Specified | Active | RoHS Compliant |
| V7-1C27D8-000-1 | Honeywell Sensing and Productivity Solutions | 15A | 125V | Quick Connect - 0.187" | -40°C to 85°C | 100,000 Cycles | Obsolete | RoHS Compliant |
| V7-2B29D8 | Honeywell Sensing and Productivity Solutions | 11A | 125V | Quick Connect - 0.187" | -40°C to 85°C | 100,000 Cycles | Active | RoHS Compliant |
Engineering Selection Recommendations
Primary Recommendation - Direct Substitution:
The V7-1K20E9 (Honeywell, 22A at 125V AC) is the preferred direct substitute for the 1478620-1. This part maintains identical circuit configuration (SPST-NO), switch function (Off-Mom), actuator type (Round Pin Plunger), mounting type (Chassis Mount), and termination style (Quick Connect - 0.250"). The 22A current rating exceeds the original 16A specification, providing margin for application requirements. The V7-1K20E9 is active product status with RoHS compliance certification.
Secondary Recommendation - Equivalent Current Capacity:
The V7-1V20E9-000-1 (Honeywell, 21A at 125V AC) provides equivalent electrical performance with 21A current capacity, exceeding the 16A requirement. This part shares all mechanical and electrical compatibility parameters with the primary recommendation and is active product status with RoHS compliance.
Alternative Recommendation - Minimum Acceptable Substitution:
The V7-1C28E9 (Honeywell, 15A at 125V AC) meets the minimum electrical requirements with 15A current capacity. While this rating is marginally below the original 16A specification, it is suitable for applications where the actual operating current does not exceed 15A. This part is active product status with RoHS compliance and identical termination style (Quick Connect - 0.250").
Not Recommended for Direct Substitution:
- V7-1X2AD9C2 (6A rating): Current capacity is insufficient for applications requiring 16A operation.
- V7-1C27D8-000-1 (0.187" termination): Termination style differs from the original 0.250" specification, requiring connector modification.
- V7-2B29D8 (11A rating, 0.187" termination): Both current capacity and termination style are incompatible.
Temperature Consideration:
The original 1478620-1 operates from -20°C to 130°C. All Honeywell V7 series substitutes operate from -40°C to 85°C. Applications requiring operation above 85°C are not compatible with these substitutes. The V7-1Z23E9 (277V rated) extends the upper temperature limit to 150°C but operates at a different voltage rating and is not suitable for 125V applications.
Frequently Asked Questions (FAQ)
Q: Can the V7-1C28E9 be used as a direct replacement for the 1478620-1?
A: The V7-1C28E9 is functionally compatible with identical circuit configuration, switch function, actuator type, mounting type, and termination style. The 15A current rating is marginally below the original 16A specification. This substitution is acceptable for applications where actual operating current does not exceed 15A. For applications requiring full 16A capacity, the V7-1K20E9 or V7-1V20E9-000-1 are preferred.
Q: What is the difference between the V7-1K20E9 and V7-1V20E9-000-1?
A: Both parts are rated for 125V AC operation with 22A and 21A current capacity respectively, exceeding the original 16A requirement. The V7-1K20E9 has an operating force of 225gf, while the V7-1V20E9-000-1 has an operating force of 160gf. Both share identical termination style (Quick Connect - 0.250"), mounting type (Chassis Mount), and circuit configuration (SPST-NO). Selection between these parts depends on actuator force requirements for the specific application.
Q: Why do some substitute parts have different termination styles?
A: The V7-1C27D8-000-1 and V7-2B29D8 feature Quick Connect - 0.187" (4.7mm) termination, while the original 1478620-1 uses Quick Connect - 0.250" (6.3mm). These different termination sizes are not mechanically compatible without connector modification. Parts with matching 0.250" termination (V7-1C28E9, V7-1K20E9, V7-1V20E9-000-1, V7-1X2AD9C2) are direct plug-in replacements.
Q: Is the V7-1X2AD9C2 suitable for the original application?
A: The V7-1X2AD9C2 has a 6A current rating, which is significantly below the original 16A specification. This part is suitable only for applications with maximum operating current of 6A. For applications requiring 16A capacity, this part is not appropriate.
Q: What is the impact of the different operating temperature ranges?
A: The original 1478620-1 operates from -20°C to 130°C. All recommended Honeywell V7 series substitutes operate from -40°C to 85°C. The lower temperature limit (-40°C vs -20°C) provides extended cold-weather capability. However, the upper temperature limit (85°C vs 130°C) is reduced by 45°C. Applications requiring operation above 85°C are not compatible with these substitutes.
Q: Are all recommended substitutes RoHS compliant?
A: Yes. The V7-1C28E9, V7-1K20E9, V7-1V20E9-000-1, and V7-1X2AD9C2 are all RoHS compliant. The original 1478620-1 RoHS status is not specified in the available documentation.
Q: What does "Off-Mom" switch function mean?
A: Off-Mom (Off-Momentary) indicates that the switch is normally in the off (open) position and closes only while the actuator is being pressed. When the actuator is released, the switch returns to the off position. All substitute parts maintain this identical switch function.
Q: Can I use a 277V rated part as a substitute for a 125V application?
A: No. Parts rated for 277V (such as V7-1Y29E9, V7-1Z20E9, V7-1Z23E9, V7-1Z29E9) are not suitable for 125V applications. Voltage ratings are not interchangeable. Use only parts rated for 125V AC operation.
Q: What is the significance of "Electrical Life: 100,000 Cycles"?
A: Electrical life indicates the number of switching cycles the part is rated to perform under electrical load before degradation occurs. The 100,000-cycle rating is consistent across the original part and all recommended substitutes, ensuring equivalent reliability for switching operations.
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