NKK Switches S211 Toggle Switch SPST — Equivalent & Substitute Parts

Part Overview

The NKK Switches S211 is a panel-mount toggle switch with SPST (Single Pole Single Throw) circuit configuration, rated for 3A at 125V AC and 1.5A at 30V DC. This part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and component procurement.

The S211 features a standard round actuator with solder lug termination and operates across a temperature range of -10°C to 70°C. With 10,000 electrical cycles rated life and a circular 12.50mm panel cutout, this switch is suitable for general-purpose on-off control applications in industrial and consumer equipment.

Substiute Parts

S211

NKK SwitchesIn Stock: 1031S211 Datasheet

Current PartRFQ

S301

NKK SwitchesIn Stock: 1395S301 Datasheet

SimilarRFQ

110-73

Carling TechnologiesIn Stock: 2007110-73 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the S211 is determined by the following critical parameters:

• Circuit Configuration: Must be SPST (Single Pole Single Throw)
• Switch Function: Must be On-Off operation
• Mounting Type: Must be Panel Mount with compatible panel cutout dimensions
• Termination Style: Must be Solder Lug
• Voltage Rating (AC): Must support minimum 125V AC
• Current Rating: Must support application requirements (minimum 3A AC or 1.5A DC for direct replacement)
• Actuator Type: Standard Round for mechanical compatibility
• Operating Temperature: Must encompass or exceed -10°C to 70°C range

The identified substitute parts meet these core criteria while offering enhanced electrical performance characteristics and active product status.

Parameter Comparison

Engineering Selection Recommendations

NKK Switches S301: This part is manufactured by the same supplier as the original S211 and maintains identical AC voltage rating (125V), DC voltage rating (30V), and panel cutout dimensions (12.50mm). The S301 offers superior current handling (15A AC / 20A DC versus 3A AC / 1.5A DC) and extended electrical life (25,000 cycles versus 10,000 cycles). The S301 carries active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment. Mechanical compatibility is confirmed through matching M12 x 1 bushing thread and solder lug termination. The 1mm increase in actuator length (17.50mm versus 16.50mm) is within typical mechanical tolerance for panel-mount applications.

Carling Technologies 110-73: This part provides SPST on-off functionality with 6A AC/DC current rating and 125V AC voltage support. The 110-73 offers extended DC voltage rating (125V versus 30V) and broader operating temperature range (-17.8°C to 65.6°C). Electrical life matches the S301 at 25,000 cycles. The part carries ROHS3 compliance and active product status. Panel cutout diameter is 12.70mm (0.20mm larger than S211), and bushing thread is 15/32-32 (metric-to-imperial conversion required). Solder lug termination and standard round actuator ensure functional compatibility. The cross-manufacturer substitution introduces a different bushing thread specification requiring panel modification or adapter consideration.

Frequently Asked Questions (FAQ)

Q: Can the S301 directly replace the S211 without circuit modification?

A: Yes. Both parts share identical SPST circuit configuration, 125V AC voltage rating, 30V DC voltage rating, solder lug termination, and M12 x 1 bushing thread. The S301's higher current rating (15A AC / 20A DC) is backward-compatible with applications designed for 3A AC / 1.5A DC. The 1mm actuator length difference does not affect electrical function or standard panel mounting.

Q: What are the mechanical considerations when substituting the 110-73 for the S211?

A: The 110-73 requires a 12.70mm panel cutout diameter (versus 12.50mm for S211) and uses a 15/32-32 bushing thread (versus M12 x 1). Existing panel cutouts designed for the S211 may require enlargement or use of a panel adapter. The bushing thread difference necessitates verification of mounting hardware compatibility.

Q: Does the S301 offer improved reliability compared to the S211?

A: The S301 provides 25,000 electrical cycles rated life versus 10,000 cycles for the S211, representing a 2.5x improvement in cycle endurance. Both parts operate across the same temperature range (-10°C to 70°C). The S301's active product status ensures continued manufacturing support and supply chain stability.

Q: Are there voltage rating differences between the substitute parts?

A: All three parts support 125V AC operation. DC voltage ratings differ: S211 and S301 are rated 30V DC, while the 110-73 is rated 125V DC. Applications requiring DC operation above 30V must use the 110-73. AC-only applications show no functional difference across all three parts.

Q: What compliance certifications apply to substitute parts?

A: Both the S301 and 110-73 carry ROHS3 compliance and REACH Unaffected status. The S211 product status does not specify RoHS compliance. All three parts share identical ECCN (EAR99) and HTSUS (8536.50.9065) classifications.