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GSCA01A1B Equivalent & Substitute Parts Reference
Part Overview
The GSCA01A1B is a snap action switch manufactured by Honeywell Sensing and Productivity Solutions, configured as a DPST-NO/NC chassis mount device with dual momentary switching capability. This component operates at 6A AC (120V) and 550mA DC (125V) with side rotary roller actuation and IP66 ingress protection. The product is classified as obsolete, necessitating identification of functionally equivalent active alternatives from current manufacturers to maintain system continuity and ensure long-term component availability.
Substiute Parts
Key Parameters
| Parameter | GSCA01A1B Value |
|---|---|
| Manufacturer | Honeywell Sensing and Productivity Solutions |
| Circuit Configuration | DPST-NO/NC |
| Switch Function | On-Mom, Off-Mom |
| Current Rating (AC) | 6A |
| Current Rating (DC) | 550mA |
| Voltage Rating (AC) | 120V |
| Voltage Rating (DC) | 125V |
| Actuator Type | Side Rotary, Roller |
| Mounting Type | Chassis Mount |
| Termination Style | Screw Terminal |
| Ingress Protection | IP66 |
| Operating Temperature Range | -25°C to 85°C |
| Product Status | Obsolete |
| RoHS Compliance | RoHS Compliant |
Substitute Part Grouping Explanation
Substitution of the GSCA01A1B requires matching the following critical electrical and mechanical parameters:
Primary Matching Criteria:
- Circuit configuration: DPST-NO/NC (dual pole, single throw with normally open and normally closed contacts)
- Switch function: On-Mom, Off-Mom (momentary operation in both directions)
- Actuator type: Side rotary with roller mechanism
- Mounting: Chassis mount with screw terminals
- AC voltage rating: 120V minimum
- AC current rating: 6A minimum
Secondary Compatibility Factors:
- Ingress protection rating of IP66 or higher
- Operating temperature range encompassing -25°C to 85°C
- RoHS compliance status
From the provided substitute list, D4B-2511N and D4N series variants (D4N-1A22, D4N-1A25, D4N-1A26, D4N-1E22, D4N-2122) meet the core DPST-NO/NC circuit and momentary function requirements. However, electrical ratings differ significantly across candidates, requiring careful parameter alignment for specific application contexts.
Parameter Comparison
| Parameter | GSCA01A1B | D4B-2511N | D4N-1A22 | D4N-1A25 | D4N-1A26 | D4N-1E22 | D4N-2122 |
|---|---|---|---|---|---|---|---|
| Manufacturer | Honeywell | Omron | Omron | Omron | Omron | Omron | Omron |
| Circuit | DPST-NO/NC | DPST-NO/NC | DPST-NO/NC | DPST-NO/NC | DPST-NO/NC | DPST-NO/NC (MBB) | DPST-NO/NC |
| Switch Function | On-Mom, Off-Mom | On-Mom, Off-Mom | On-Mom, Off-Mom | On-Mom, Off-Mom | On-Mom, Off-Mom | On-Mom, Off-Mom | On-Mom, Off-Mom |
| Current (AC) | 6A | 10A | 3A | 3A | 3A | 3A | 3A |
| Current (DC) | 550mA | 6A | 270mA | 270mA | 270mA | 270mA | 270mA |
| Voltage (AC) | 120V | 120V | 240V | 240V | 240V | 240V | 240V |
| Voltage (DC) | 125V | 30V | 250V | 250V | 250V | 250V | 250V |
| Actuator Type | Side Rotary, Roller | Side Rotary, Roller | Side Rotary, Roller | Side Rotary, Roller | Side Rotary, Roller | Side Rotary, Roller | Side Rotary, Roller |
| Mounting | Chassis Mount | Chassis Mount | Chassis Mount | Chassis Mount | Chassis Mount | Chassis Mount | Chassis Mount |
| Termination | Screw Terminal | Screw Terminal | Screw Terminal | Screw Terminal | Screw Terminal | Screw Terminal | Screw Terminal |
| Ingress Protection | IP66 | IP67 | IP67 | IP67 | IP67 | IP67 | IP67 |
| Operating Temperature | -25°C to 85°C | -40°C to 80°C | -30°C to 70°C | -30°C to 70°C | -30°C to 70°C | -30°C to 70°C | -30°C to 70°C |
| Product Status | Obsolete | Active | Active | Active | Active | Active | Active |
| RoHS Status | RoHS Compliant | ROHS3 Compliant | ROHS3 Compliant | Not applicable | Not applicable | Not applicable | ROHS3 Compliant |
Engineering Selection Recommendations
D4B-2511N is the primary substitute candidate for applications operating at 120V AC with DPST-NO/NC momentary switching requirements. This Omron component maintains active product status, carries ROHS3 compliance certification, and provides superior current handling (10A AC versus 6A AC) with enhanced ingress protection (IP67 versus IP66). The D4B-2511N accommodates the GSCA01A1B's electrical envelope while offering improved environmental sealing and mechanical durability (10,000,000 cycle mechanical life).
D4N series variants (D4N-1A22, D4N-1A25, D4N-1A26, D4N-1E22, D4N-2122) are suitable only for applications requiring 240V AC operation. These components are not direct substitutes for 120V AC systems due to voltage rating mismatch. Selection within the D4N series depends on specific mechanical feature requirements (roller type: resin, bearing, or metal) and pretravel specifications.
All recommended substitutes feature:
- Identical circuit topology (DPST-NO/NC)
- Matching momentary switch function (On-Mom, Off-Mom)
- Equivalent actuator mechanism (side rotary roller)
- Identical mounting and termination (chassis mount, screw terminal)
- Active product status ensuring long-term availability
- Current regulatory compliance (ROHS3 or equivalent)
Frequently Asked Questions (FAQ)
Q: Can D4N series switches replace GSCA01A1B in existing 120V AC circuits?
A: No. D4N series components are rated for 240V AC operation. Using a 240V-rated switch in a 120V circuit creates a voltage mismatch that violates electrical design specifications. D4B-2511N is the correct 120V AC substitute.
Q: What is the difference between D4N-1A22, D4N-1A25, and D4N-1A26?
A: All three maintain identical electrical ratings (3A AC, 240V AC, DPST-NO/NC). Differences exist only in mechanical features: D4N-1A22 uses a resin roller, D4N-1A25 uses a metal roller, and D4N-1A26 uses a bearing roller. Selection depends on application-specific wear and friction requirements.
Q: Why does D4B-2511N show 30V DC rating when GSCA01A1B is rated 125V DC?
A: DC voltage ratings reflect the maximum safe switching voltage for DC loads. The D4B-2511N's 30V DC rating is lower than GSCA01A1B's 125V DC rating. For DC applications exceeding 30V, D4B-2511N is not suitable. Verify DC operating voltage before substitution.
Q: Is IP67 ingress protection compatible with IP66 applications?
A: Yes. IP67 (dust tight, waterproof) provides superior environmental protection compared to IP66 (dust tight, water resistant). A component rated IP67 can be used in applications specified for IP66 without degradation of environmental sealing performance.
Q: What does "On-Mom, Off-Mom" switch function mean?
A: This indicates momentary operation in both directions. The switch returns to neutral when released in both the on and off positions. This is essential for applications requiring manual control with automatic return to center.
Q: Are all substitute parts available in the same packaging as GSCA01A1B?
A: GSCA01A1B packaging is listed as "-" (unspecified). All Omron substitutes are supplied in bulk packaging. Verify packaging requirements with your procurement department before finalizing component selection.
Q: Does ROHS3 compliance differ from RoHS compliance?
A: ROHS3 represents the current regulatory standard (Directive 2011/65/EU as amended). RoHS Compliant indicates earlier compliance. ROHS3-compliant components meet current environmental regulations and are preferred for new designs.
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