Overview
The Square D 9050JCK15V20 is a general-purpose, plug-in on-delay timing relay designed for low-cost timing applications in industrial control circuits. Manufactured by Schneider Electric, this JCK-series timer features DPDT (double-pole, double-throw) contacts with an adjustable time range of 1.8 to 180 seconds, making it ideal for sequencing, startup delays, and protective timing functions across manufacturing, HVAC, material handling, and automation systems.
Key Features
- On-Delay Timing Mode: Time delay begins when input voltage is applied; contacts change state after delay is complete.
- Adjustable Timing Range: 1.8 to 180 seconds via knob adjustment on top of timer.
- DPDT Contact Configuration: 2 normally open (NO) and 2 normally closed (NC) contacts for flexible logic control.
- Plug-In Housing: Installs directly into 8501NR51 or 8501NR52 relay sockets for quick replacement and reliable electrical connection.
- Compact Footprint: Dimensions 4.2 x 2.6 x 2 inches; weight 0.24 lbs for easy panel mounting.
- Industrial-Grade Ratings: 10A resistive at 120/240 VAC and 30 VDC; 3A inductive; 1/3 HP NC, 1/2 HP NO at 120/240 VAC.
Technical Specifications
- Part Number: 9050JCK15V20
- Series: JCK (Class 9050)
- Manufacturer: Square D / Schneider Electric
- Contact Configuration: DPDT (2 NO / 2 NC)
- Timing Mode: On-Delay
- Timing Range: 1.8 to 180 seconds
- Input Voltage: 120 VAC / 110 VDC coil
- Contact Voltage (AC): 120 VAC, 240 VAC
- Contact Voltage (DC): 30 VDC
- Contact Current (Resistive): 10 A @ 120/240 VAC, 30 VDC
- Contact Current (Inductive): 3 A @ 120/240 VAC, 30 VDC
- Horsepower Rating: 1/3 HP (NC contacts), 1/2 HP (NO contacts) @ 120/240 VAC
- Mounting Style: Plug-in socket (8501NR51, 8501NR52)
- Adjustment: Knob (top-mounted)
- Dimensions: 4.2 x 2.6 x 2 inches
- Weight: 0.24 lbs
- Certifications: UL Listed, CSA Certified, CE Marked
Typical Applications
- Motor Starting & Protection: Provide controlled startup delay, soft-start sequencing, and overload protection timing.
- HVAC Systems: Delay compressor activation, stage cooling/heating sequences, fan run-on delays.
- Material Handling & Conveyor: Coordinate multi-stage loading, unloading, or transfer operations.
- Manufacturing & Assembly: Synchronize machine cycles, solenoid actuation delays, and production line timing.
- Building Automation: Control lighting sequences, door access delays, occupancy-based timing logic.
- Crane & Hoist Controls: Safety interlocks, brake release delays, lift sequencing.
Compatibility & Replacements
Compatible With
- 8501NR51 relay socket (8-pin octal base)
- 8501NR52 relay socket (8-pin octal base)
- 35 mm DIN 3 mounting track
- Panel-mount control enclosures
- Industrial control systems using 120 VAC / 110 VDC coil voltage
- Circuits requiring DPDT switching logic
Replaces / Drop-In Replacement For
- Square D 9050JCK15V20 (exact OEM replacement)
- Other 8-pin octal timing relays with identical socket compatibility
- Verify compatibility with your system integrator before ordering.
Works With
- Square D / Schneider Electric control systems
- Allen-Bradley CLX platforms (via legacy relay integration)
- Siemens S7 systems (with appropriate I/O relay modules)
- Any 120 VAC / 110 VDC industrial control circuit
- PLC/DCS soft-start and sequencing logic
- Hardwired contactor and starter circuits
