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

Part Number List

Results 1
Models table for series CW Series Relays
Part No.DatasheetTerminal TypeRated Coil VoltageContact ArrangementProtective ConstructionOperating Function Operate (Set) Voltage (at20&deg;C) (Initial) Release (Reset) voltage (at20&deg;C) (Initial)Rated Operating Current [&plusmn;10%] (at 20&deg;C)Coil Resistance (At 20oC)Rated Operating Power (at 20&deg;C) Usable Voltage RangeContact Resistance (Initial)Contact MaterialContact Data: Max. Carrying CurrentMin. Switching Load (Resistive) Insulation Resistance (Min. M&Omega;)(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&deg;C) (Initial)Shock Resistance: Functional Shock Resistance: DestructiveVibration Resistance: FunctionalVibration Resistance: DestructiveExpected Life: Mechanical LifeExpected Life: Switch-Off LifeConditionsWeight (Typ.)Inner Carton (Pieces)Outer Carton (Pieces)
Welding terminal
12V DC
2 Form A
Single side stable
Max. 6.2V DC
Min. 0.5V DC
117 mA
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

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