Request Quote
(Ships tomorrow)
NKK Switches P2021 Toggle Switch DPST 10A 125V - Equivalent & Substitute Parts
Part Overview
The NKK Switches P2021 is a panel-mount toggle switch with DPST (Double Pole Single Throw) circuit configuration, rated for 10A at 125V AC. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing maintenance, repair, and new design applications where legacy component compatibility is required.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | P2021 |
| Manufacturer | NKK Switches |
| Circuit Configuration | DPST |
| Current Rating (AC) | 10A |
| Voltage Rating (AC) | 125V |
| Mounting Type | Panel Mount |
| Actuator Type | Standard Round with Cap |
| Termination Style | Solder Lug |
| Panel Cutout Dimensions | Circular - 6.35mm Dia |
| Bushing Thread | M6 x 0.75 |
| Operating Temperature Range | -10°C to 85°C |
| Electrical Life | 25,000 Cycles |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution of the P2021 is determined by the following critical parameters:
- Circuit Configuration: DPST topology must be maintained for electrical function equivalence
- Current Rating: Substitute must support minimum 10A AC operation
- Voltage Rating: Substitute must support minimum 125V AC operation
- Mounting Interface: Panel mount configuration with compatible panel cutout and bushing thread dimensions
- Termination: Solder lug termination for PCB integration
- Regulatory Compliance: ROHS3 compliance and REACH unaffected status required
The M2021SS1W01-BB from NKK Switches is identified as a substitute part. However, this substitute exhibits a reduced current rating of 6A AC (versus 10A AC for the P2021), which represents a functional limitation in maximum current-carrying capacity.
Parameter Comparison
| Parameter | P2021 (Main Part) | M2021SS1W01-BB (Substitute) | Compatibility Notes |
|---|---|---|---|
| Manufacturer | NKK Switches | NKK Switches | Same manufacturer |
| Circuit Configuration | DPST | DPST | Functionally equivalent |
| Current Rating (AC) | 10A | 6A | Substitute rated lower |
| Voltage Rating (AC) | 125V | 125V | Equivalent |
| Voltage Rating (DC) | Not specified | 30V | Substitute adds DC capability |
| Mounting Type | Panel Mount | Panel Mount | Functionally equivalent |
| Panel Cutout Dimensions | Circular - 6.35mm Dia | Circular - 6.50mm Dia | Slight dimensional variance |
| Bushing Thread | M6 x 0.75 | 1/4-40 | Different thread specification |
| Actuator Length | 13.00mm | 14.60mm | Minor length difference |
| Operating Temperature Range | -10°C to 85°C | -30°C to 85°C | Substitute supports wider range |
| Electrical Life | 25,000 Cycles | 25,000 Cycles | Equivalent |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | Both compliant |
| Termination Style | Solder Lug | Solder Lug | Equivalent |
Engineering Selection Recommendations
The M2021SS1W01-BB presents a viable substitute for P2021 applications where current requirements do not exceed 6A AC at 125V. Both components maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for equivalent product selection.
Substitution feasibility depends on application current demand. Applications requiring the full 10A AC rating of the P2021 cannot use the M2021SS1W01-BB without risk of component thermal stress and premature failure. Panel mounting geometry differences (6.35mm versus 6.50mm cutout diameter, M6 x 0.75 versus 1/4-40 bushing thread) require mechanical verification during integration.
The M2021SS1W01-BB offers extended operating temperature range (-30°C to 85°C versus -10°C to 85°C), providing thermal margin for applications in lower-temperature environments.
Frequently Asked Questions (FAQ)
Q: Can the M2021SS1W01-BB directly replace the P2021 in all applications?
A: No. The M2021SS1W01-BB is rated for 6A AC maximum, while the P2021 is rated for 10A AC. Substitution is valid only for applications where actual circuit current does not exceed 6A AC at 125V.
Q: What are the mechanical compatibility concerns?
A: Panel cutout diameter differs (6.35mm P2021 versus 6.50mm M2021SS1W01-BB). Bushing thread specifications differ (M6 x 0.75 versus 1/4-40). Mechanical integration must be verified for panel mounting compatibility.
Q: Are both parts RoHS compliant?
A: Yes. Both P2021 and M2021SS1W01-BB are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.
Q: Does the M2021SS1W01-BB support DC operation?
A: Yes. The M2021SS1W01-BB is rated for 4A DC at 30V, providing DC switching capability not specified for the P2021.
Q: What is the electrical life expectancy for both components?
A: Both components are rated for 25,000 electrical cycles, providing equivalent operational longevity under specified conditions.
Q: How do operating temperature ranges compare?
A: The P2021 operates from -10°C to 85°C. The M2021SS1W01-BB operates from -30°C to 85°C, offering extended low-temperature performance.
Alternative Parts
SJ6012L2TP
Littelfuse Inc.
6 Alternative Parts
JMK107BBJ476MA-RE
Taiyo Yuden
10 Alternative Parts
GMK107BBJ475MA-T
Taiyo Yuden
5 Alternative Parts
SJ6020N2ARP
Littelfuse Inc.
3 Alternative Parts
SJ6025R2ATP
Littelfuse Inc.
4 Alternative Parts
2474-05L
API Delevan Inc.
1 Alternative Parts
4590R-684K
API Delevan Inc.
1 Alternative Parts
CM6560R-334
API Delevan Inc.
1 Alternative Parts
CM6460-104
API Delevan Inc.
1 Alternative Parts
5526-12
API Delevan Inc.
1 Alternative Parts