The KSK-1A54 is a high frequency reed switch with glass length of 53.4mm and diameter of 5.4mm.
This high frequency reed switch has a rated power 25 W, Switching voltage 500 VDC, Switching current 1.5 Amp DC.
| Overall Length mm (inches) | 81.6 (3.212) | 
| Glass Length Max. mm (inches) | 53.4 (2.102) | 
| Glass Dia. Max. mm (inches) | 5.40 (0.212) | 
| Lead Dia. mm (inches) | 1.3 (0.051) | 
| Contact Form | 1A (SPST) Normally Open (N.O.) | 
| Rated Power Max. | 25W/500VDC/1.5 Amp DC | 
	Medical equipment, test and measurement (ATE), high power, high voltage, RF
	
	
	https://standexelectronics.com/products/ksk-1a54-series-reed-switch-3/