| . Economic price. |
| .Wide operating voltage range:3 wire 10-30VDC and 2 wire 90-250 VAC. |
| . With operating indicator LED. |
| .May drive 150 mA loads directly. |
| .DC type with reverse-polarity proof. |
| .DC S5, S10, S20 type with short circuit and over load proof. |
| .The lowest residual voltage. |
| .AC types are O-cross SCR output, operating stable. |