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It has a yellow LED on the left and a green LED on the right.The left yellow LED uses pins 9 and 10, and the right green LED uses pins 11 and 12.
WH56A31882021103 is rated for 125 V AC and 1.5 A.Contact resistance is 30 mΩ max, insulation resistance is 500 MΩ min at 500 V DC, and dielectric strength is 1000 V AC for 1 minute.
WH56A31882021103 adds yellow and green LEDs; WH56A31880021101 has none.Both share the same 16.26 × 15.75 × 13.1 mm body, 8P8C pinout and electrical ratings. The LED version adds four LED pins to the PCB layout.