SS-21A Type Time RelayDetailed product description：

1. Scope of application

The SS-21A time relay (hereinafter referred to as the relay) is suitable for various relay protection and automatic control circuits, enabling the controlled components to obtain the required high-precision delay.

3. Model

model	rated voltage	Rated range	Rated level difference	Contact type
SS-21A	DC　220V	0.01-0.99s	0.01s	1 instantaneous motion conversion 1 delayed conversion
	DC　110V	0.1-9.9s	0.1s
	DC　48V	1-99s	1s

Operating voltage: not exceeding 70% of the rated voltage.  
Return voltage: not less than 5% of the rated value.  
Setting error: not greater than ± 1% maximum setting value+0.050so
Delay consistency: not greater than 0.2% maximum setting value+0.050s.
Power consumption: not exceeding 12W.
Contact capacity: In a DC inductive load circuit with a voltage not exceeding 250V, a current not exceeding 5A, and a time constant of 5 ± 0.75ms, the output contact of the product has a breaking capacity of 50W. Under the specified load conditions, the output contact of the product can reliably operate and return 5 × 104 times. The long-term allowable current for the output contact is 5A.
Dielectric strength: The conductive terminals of the product are connected together and can withstand an AC voltage of 2000V (effective value) 50Hz for 1 minute between exposed non charged metal parts or shells without insulation breakdown or flashover.  

Attached Resistance Specification Table:

model	rated voltage	specification
SS-21A	DC　220V	3.6kΩ
	DC　110V	1.7kΩ
	DC　48V	0.5kΩ

3. Internal wiring

4. Appearance and opening size

SS-21A type time relay