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Panasonic Electric Works AQY221N1SZ — Signal Relays

Panasonic AQY221N1SZ PhotoMOS Relay, 120 mA, 40 V, SPST-NO

MPNAQY221N1SZ
Obsolete

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

Panasonic Electric Works AQY221N1SZ datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

AQY221N1SZ 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)
Case4-SOP (0.173\", 4.40mm)
Termination styleGull Wing
On-State resistance12.5 Ohms

Product details

RF signal-switching parametrics

The AQY221N1SZ: This is a PhotoMOS relay from the AQY series, configured as SPST-NO (1 Form A) with an AC/DC output type optimised for RF signal paths. The 120 mA load current and 40 V load voltage ceiling suit low-power switching in test equipment, instrumentation, or RF front-end bypass circuits where mechanical relay noise or bounce is unacceptable. On-state resistance maxes out at 12.5 Ohms — higher than a mechanical relay but typical for a solid-state opto-MOSFET design.

Package and board integration

Housed in a 4-SOP (0.173", 4.40 mm body) surface-mount package with gull-wing leads, the AQY221N1SZ occupies a compact footprint on the PCB. The supplier device package is designated 4-SOP; the gull-wing termination style is standard for reflow soldering and allows visual inspection of the solder joints. Supplied in tape and reel for automated pick-and-place assembly — no manual handling required for volume production.

Frequently asked questions

What is the AQY221N1SZ used for?

It is a solid-state relay (PhotoMOS) for switching low-level AC or DC signals, particularly in RF applications where silent, bounce-free operation is required. Typical uses include signal routing in test equipment, multiplexing in data acquisition, and bypass switching in RF front-ends.

What is the on-state resistance of the AQY221N1SZ?

Maximum on-state resistance is 12.5 Ohms. This is higher than a mechanical relay but typical for a solid-state opto-MOSFET output; the trade-off is silent, bounce-free switching with no contact wear.