KSK-1C90U Series Reed Switch
The KSK-1C90U Series is a miniature SPDT (Form C) changeover reed switch designed for precision switching in compact and demanding environments. With a glass body length of 14.0 mm and diameter of 2.54 mm, this switch supports switching voltages up to 175 VDC, currents up to 0.5 A, and a rated power of 10 W.
Its hermetically sealed construction ensures long-term reliability, while the wide operate range (15–40 AT) provides consistent magnetic sensitivity. The KSK-1C90U is UL-approved and widely used in general-purpose, industrial, and test and measurement (ATE) applications.
Standards and Certifications
- SPDT changeover functionality for flexible circuit design
- Miniature form factor ideal for space-constrained applications
- Hermetically sealed glass body protects against moisture and contaminants
- Flat lead configuration supports secure mounting and automated assembly
- No power required for actuation, enabling energy-efficient designs
- UL-approved for compliance in regulated environments
| Overall Length mm (inches) | 56.1 (2.208) |
| Glass Length Max. mm (inches) | 14.0 (0.551) |
| Glass Dia. Max. mm (inches) | 2.54 (0.100) |
| Lead Dia. mm (inches) | 0.5 (0.019) |
| Contact Form | 1C (SPDT) Changeover |
| Pull-In Range | 15-40 AT |
| Rated Power Max. | 10W/175VDC/0.5 Amp DC |
- Test and measurement equipment (ATE)
- Industrial automation and control systems
- Security and alarm systems
- Position and proximity sensing
- Consumer electronics and appliances
- Automotive sensors and switches