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Panasonic Electric Works AQY221N2SX — Signal Relays

Panasonic AQY221N2SX PhotoMOS Relay, SPST-NO, 120 mA, 40 V

MPNAQY221N2SX
Active

Panasonic Electric Works PhotoMOS™ AQY series, SPST-NO (1 Form A) signal relay, 120 mA load current, 0 V ~ 40 V load voltage, 4-SOP surface mount package, gull wing terminals.

$4.5800Ref. price · indicative, final on quote
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

AQY221N2SX specifications
ParameterValue
SeriesPhotoMOS™ AQY
Output typeAC, DC (RF)
MountingSurface Mount
Voltage - load0 V ~ 40 V
Voltage - input1.14VDC
Load current120 mA
CircuitSPST-NO (1 Form A)
PackageTape & Reel (TR) Cut Tape (CT)
Case4-SOP (0.173\", 4.40mm)
Termination styleGull Wing
On-State resistance12.5 Ohms

Product details

What this PhotoMOS relay does on a signal board

The AQY221N2SX is a solid-state relay from the PhotoMOS AQY series, switching AC or DC signals up to 120 mA through an isolated input at 1.14 VDC. The SPST-NO (1 Form A) output handles 0 V to 40 V across the load terminals, with a maximum on-state resistance of 12.5 Ohms — that resistance sets the self-heating at full current, so the 120 mA rating is the practical ceiling in a 4-SOP package without airflow.

RF-rated output and package constraints

The output is explicitly rated for AC, DC, and RF signals — the PhotoMOS construction gives faster switching and longer life than an electromechanical relay in RF path switching or low-level signal multiplexing.

Frequently asked questions

How do I get current pricing and availability for the AQY221N2SX?

The AQY221N2SX is sourced through independent and authorized distribution channels.

What is the on-state resistance of the AQY221N2SX and why does it matter?

Maximum on-state resistance is 12.5 Ohms. At 120 mA load current, that resistance dissipates about 180 mW — well within the 4-SOP package's thermal budget, but it does mean the relay self-heats proportionally to the load current squared, so the 120 mA rating is the practical limit in still air.