CW Series Relays

Panasonic's CW Series Relay is an Automotive Relay used for failsafe circuits in high output motors such as electronic power steering (EPS). This relay has a DPST (2FormA) contact arrangement, which is ideal for the 2-path cutoff of a 3-phase motor using a single coil. This relay has an SPDT (1FormC) contact arrangement and uses a 12VDC coil with a maximum pick-up voltage of 7.2VDC and 1.4W nominal operating power.

Using a high conductivity material, the nominal resistive load switching of the CW Series Relay is 120A @ 14VDC. However, this relay can also carry 70A for 1 minute or 45A continuously at 85 Degrees Celsius. The CW Series Relay employs high heat resistance plastic which can withstand ambient operating temperatures up to 125 degrees Celsius.

Features and Benefits of CW Series Relays

Ideal Relay For High Output 3-Phase Motors
High Current Cutoff
High Carrying Current And High Heat Resistance

CW Series Relays - Applications

3-Phase Motor EPS Unit

Models table for series CW Series Relays
Part No.	Datasheet	Terminal Type	Rated Coil Voltage	Contact Arrangement	Protective Construction	Operating Function	Operate (Set) Voltage (at20°C) (Initial)	Release (Reset) voltage (at20°C) (Initial)	Rated Operating Current [±10%] (at 20°C)	Coil Resistance (At 20oC)	Rated Operating Power (at 20°C)	Usable Voltage Range	Contact Resistance (Initial)	Contact Material	Contact Data: Max. Carrying Current	Min. Switching Load (Resistive)	Insulation Resistance (Min. MΩ)(Initial)	Dielectric Strength (Between Open Contacts) (Initial)	Dielectric Strength (Between Contacts and Coil) (Initial)	Operate (Set) Time<br>(At Rated Coil Voltage) (At 20oC) (Initial)	Release (Reset) Time<br>(at Rated Coil Voltage) (at 20°C) (Initial)	Shock Resistance: Functional	Shock Resistance: Destructive	Vibration Resistance: Functional	Vibration Resistance: Destructive	Expected Life: Mechanical Life	Expected Life: Switch-Off Life	Conditions	Weight (Typ.)	Inner Carton (Pieces)	Outer Carton (Pieces)
ACW212		Welding terminal	12V DC	2 Form A	Sealed	Single side stable	Max. 6.2V DC	Min. 0.5V DC	117 mA	103Ω	1.4 W	10 to 16V DC	Max. 50mΩ (typ. 1.2mΩ) (By voltage drop 1A 6V DC)	Ag alloy	120A for 5 sec. (Coil applied voltage 14V DC at 20°C 68°F) 70A for 1 min. (Coil applied voltage 14V DC at 85°C 185°F)	1A 14V DC (at 20°C 68°F)	Min. 100 MΩ (at 500V DC, Measurement at same location as [Dielectric strength] section.)	500 Vrms for 1 min. (Detection current: 10mA)	500 Vrms for 1 min. (Detection current: 10mA)	Max. 20ms (without contact bounce time)	Max. 20ms (Without contact bounce time) (Without diode)	Min. 200 m/s² [approx. 20G] (Half-wave pulse of sine wave: 11ms; detection time: 10µs) (Coil applied voltage 12V DC at 20°C 68°F)	Min. 1,000 m/s² [approx. 100G] (Half-wave pulse of sine wave: 6ms)	10 to 500 Hz, Min. 44.1 m/s² [approx. 4.5G] (Detection time: 10µs) (Coil applied voltage 12V DC at 20°C 68°F)	10 to 500 Hz, Min. 44.1 m/s² [approx. 4.5G], Time of vibration for each direction; X, Y, Z direction: 4 hours	Min. 2x10⁵ (at 60 cpm)	200 A 14V DC resistive load, Min. 3 times (without diode)	Ambient temperature: –40 to +125°C –40 to +257°F, Humidity: 2 to 85% R.H. (Please avoid icing or condensation)	Approx. 26 g .92 oz	40	160

Models table for series CW Series Relays
Part No.	Datasheet	Terminal Type	Rated Coil Voltage	Contact Arrangement	Protective Construction	Operating Function	Operate (Set) Voltage (at20°C) (Initial)	Release (Reset) voltage (at20°C) (Initial)	Rated Operating Current [±10%] (at 20°C)	Coil Resistance (At 20oC)	Rated Operating Power (at 20°C)	Usable Voltage Range	Contact Resistance (Initial)	Contact Material	Contact Data: Max. Carrying Current	Min. Switching Load (Resistive)	Insulation Resistance (Min. MΩ)(Initial)	Dielectric Strength (Between Open Contacts) (Initial)	Dielectric Strength (Between Contacts and Coil) (Initial)	Operate (Set) Time<br>(At Rated Coil Voltage) (At 20oC) (Initial)	Release (Reset) Time<br>(at Rated Coil Voltage) (at 20°C) (Initial)	Shock Resistance: Functional	Shock Resistance: Destructive	Vibration Resistance: Functional	Vibration Resistance: Destructive	Expected Life: Mechanical Life	Expected Life: Switch-Off Life	Conditions	Weight (Typ.)	Inner Carton (Pieces)	Outer Carton (Pieces)
ACW212		Welding terminal	12V DC	2 Form A	Sealed	Single side stable	Max. 6.2V DC	Min. 0.5V DC	117 mA	103Ω	1.4 W	10 to 16V DC	Max. 50mΩ (typ. 1.2mΩ) (By voltage drop 1A 6V DC)	Ag alloy	120A for 5 sec. (Coil applied voltage 14V DC at 20°C 68°F) 70A for 1 min. (Coil applied voltage 14V DC at 85°C 185°F)	1A 14V DC (at 20°C 68°F)	Min. 100 MΩ (at 500V DC, Measurement at same location as [Dielectric strength] section.)	500 Vrms for 1 min. (Detection current: 10mA)	500 Vrms for 1 min. (Detection current: 10mA)	Max. 20ms (without contact bounce time)	Max. 20ms (Without contact bounce time) (Without diode)	Min. 200 m/s² [approx. 20G] (Half-wave pulse of sine wave: 11ms; detection time: 10µs) (Coil applied voltage 12V DC at 20°C 68°F)	Min. 1,000 m/s² [approx. 100G] (Half-wave pulse of sine wave: 6ms)	10 to 500 Hz, Min. 44.1 m/s² [approx. 4.5G] (Detection time: 10µs) (Coil applied voltage 12V DC at 20°C 68°F)	10 to 500 Hz, Min. 44.1 m/s² [approx. 4.5G], Time of vibration for each direction; X, Y, Z direction: 4 hours	Min. 2x10⁵ (at 60 cpm)	200 A 14V DC resistive load, Min. 3 times (without diode)	Ambient temperature: –40 to +125°C –40 to +257°F, Humidity: 2 to 85% R.H. (Please avoid icing or condensation)	Approx. 26 g .92 oz	40	160