ca specifications contact #1 this value can change due to the switching frequency, environmental conditions, and desired reliability level, therefore it is recommended to check this with the actual load. automotive power relays small size, light weight ca relays type 12 v dc 24 v dc arrangement 1 form a 1 form b 1 form c 1 form c initial contact resistance (initial) (by voltage drop 6 v dc 1a) typ. 3 m ? contact material ag alloy (cadmium free) contact voltage drop max. 0.3 v after electrical life test, by voltage drop 12 v dc 20 a (1.4 w type), 12 v dc 30 a (1.8 w type) max. 0.3 v after electrical life test, by voltage drop 12 v dc 20 a max. 0.4 v after electrical life test, by voltage drop 12 v dc 20 a max. 0.4 v after electrical life test, by voltage drop 24 v dc 10 a rating nominal switching capacity (resistive load) 20 a 12 v dc (1.4 w type) 30 a 12 v dc (1.8 w type) 20 a 12 v dc 10 a 24 v dc (on: 2s, off: 2s) max. switching voltage 16 v 15 v 30 v max. switching current 120 a (1.4 w type) 150 a (1.8 w type) 120 a 100 a 50 a (inrush current) max. carrying current 20 a continuous (1.4 w type) 30 a for 1 min (1.8 w type) 20 a continuous 20 a continuous 10 a continuous min. switching capacity #1 1 a 12 v dc 1 a 24 v dc nominal operating power 1.4 w / 1.8 w 1.8 w expected life (min. operations) mechanical (at 120 cpm) 10 6 5 10 5 electrical 20 a (1.4 w, 1.8 w type) 10 5 (on: 2s, off: 2s) 10 5 (on 2s, off 2s) 10 5 (on 2s, off 2s) 30 a (1.8 w type) 2 10 4 (on: 3s, off: 15s) rohs directive compatibility information http://www.nais-e.com/ features 1. small size and light weight for space saving, the outside dimensions of the main body are reduced to be 21.5 mm (length) 14.4 mm (width) 37 mm (height) (.846 .567 1.457 inch) and the weight is also reduced to be approx. 19 g .67 oz (direct coupling 1 form a, 1 form b type) 2. low operating power (1.4w) type is available (1 form a, 1 form b) 3. since the terminal arrangement complies with jis d5011 b4-m1, commercial connectors are available for these types of relays. 4. superior inrush characteristics despite its small size, 120a (max. 0.1 s) capacity has been achieved by using contacts that are good at withstanding inrush currents and because of an ingenious contacting mechanism. (1 a and 1b) typical applications 1. motorcycles and automobiles motorcycle cell motors, car air conditioners, halogen lamps, etc. 2. agricultural equipment 3. battery equipped devices such as conveyance vehicles all rights rese r v ed c o p y r i gh t matsushita elect r ic w o r k s , ltd.
ca characteristics (at 20 c 68 f ) electrical life (min. operation) remarks ordering information coil data 1) standard type type 12 v dc 24 v dc max. operating speed 15 cpm 1.4 w type: at nominal load 1.8 w type: at 20 a 15 cpm (at nominal load) initial insulation resistance min. 10 m ? 30 22 ? 12 max. 8 min. 0.6 150 12 max. 8 min. 0.6 150 24 max. 16 min. 1.2 75 24 max. 16 min. 1.2 75 ( ) * 1 detection current: 10 ma * 2 excluding contact bounce time * 3 half-wave pulse of sine wave: 11ms; detection time: 10 all rights rese r v ed c o p y r i gh t matsushita elect r ic w o r k s , ltd.
ca 2) low operating power type * other pick-up voltage types are also available. please contact us for details. dimensions mm inch contact arrangement mounting type plastic sealed type dust cover type nominal voltage, v dc pick-up voltage, v dc (at 20 ? 0 .256 dia. +.012 0 19.5 .768 dimension: gener al toler ance max. 1mm .039 inch : all rights rese r v ed c o p y r i gh t matsushita elect r ic w o r k s , ltd.
ca 3. 1 form a/1 form b direct coupling type 21.5 .846 9 .354 17.4 .685 14.4 .567 6 .236 0.8 .031 15.4 .606 12.4 .488 5.5 .217 2.4 .094 37 1.457 19.5 .768 dimension: gener al toler ance max. 1mm .039 inch : 0.1 .004 1 to 3mm .039 to .118 inch : 0.2 .008 min. 3mm .118 inch : 0.3 .012 mm inch schematic (bottom view) 1 form a including load (1 form a) including diode (1 form c) 1 form b including diode type, including load type also available. 4. 1 form c screw-mounting type 14 .551 23.4 .921 19.4 .764 31.2 1.228 4 .157 2 .079 5.5 .217 2.4 .094 0.8 .031 12.2 .480 12 .472 40 1.575 59 2.323 28 1.102 r10 6.6 dia. hole .260 dia. 28.4 1.118 20 .787 9 .354 9 .354 6 .236 11.4 .449 dimension: gener al toler ance max. 1mm .039 inch : 0.1 .004 1 to 3mm .039 to .118 inch : 0.2 .008 min. 3mm .118 inch : 0.3 .012 schematic (bottom view) including diode type, including load type also available. including load (1 form c) including diode (1 form a) 1 form c 5. 1 form c direct coupling type 19.4 .764 5.5 .217 2.4 .094 0.8 .031 12.2 .480 40 1.575 28 1.102 9 .354 9 .354 6 .236 11.4 .449 23.4 .921 31.2 1.228 28.4 1.118 dimension: gener al toler ance max. 1mm .039 inch : 0.1 .004 1 to 3mm .039 to .118 inch : 0.2 .008 min. 3mm .118 inch : 0.3 .012 schematic (bottom view) including diode type, including load type also available. including load (1 form c) including diode (1 form a) 1 form c all rights rese r v ed c o p y r i gh t matsushita elect r ic w o r k s , ltd.
ca reference data 1. coil temperature rise samples: ca1as-12v-n-5, 5pcs. measured portion: inside the coil contact carrying current: 20a ambient temperature: room temperature, 85 40 20 30 20 40 60 1000 120 8085 operation range pick-up voltage (cold start) 4. ambient temperature characteristics (cold start) samples: ca1bs-12v-n-5 5. distribution of pick-up and drop-out voltage quantity: 50pcs. 6. distribution of operate and release time sample: ca1a-12v-n-5, 10pcs. 0 ambient temperature, 30 20 80 pick-up voltage drop-out voltage 0 30 20 10 40 50 60 voltage, v frequency, n 1.51.00.50 2.0 2.5 3.0 3.5 4.5 5.04.0 5.5 6.0 6.5 pick-up voltage drop-out voltage 0 coil applied voltage, %v operate and release time, ms max. min. x max. min. 15 20 10 5 25 016 10 12 14 68 operate time release time x 7-(1). electrical life test (motor load) sample: ca1a-12v-c, 3pcs. load: inrush current: 63a, steady current: 23a blower fan motor actual load (motor free) switching frequency: (on:off = 2s:2s) ambient temperature: room temperature load current waveform load: inrush current: 63a, steady current: 23a, change of pick-up and drop-out voltage change of contact resistance 500ms 10a 0 no. of operations, ? all rights rese r v ed c o p y r i gh t matsushita elect r ic w o r k s , ltd.
ca cautions regarding the protection element for cautions f or us e , see rel a y t e c hnical in f ormation. 7-(2). electrical life test (lamp load) sample: ca1a-12v-c, 3pcs. load: 60wx4, inrush current: 110a, steady current: 20a halogen lamp actual load switching frequency: (on:off = 1s:14s) ambient temperature: room temperature load current waveform load: inrush current: 110a, steady current: 20a, change of pick-up and drop-out voltage change of contact resistance 200ms 20a 0 no. of operations, ? 1. part numbers without protection elements 1) 12 v models when connecting a coil surge protection circuit to these relays, we recommend a zener diode with a zener voltage of 24 v or higher, or a resistor (680 ? ? ? ? 2. part numbers with diodes these relays use a diode in the coil surge protection element. therefore, the release time is slower and the working life might be shorter compared to part numbers without protection elements and part numbers with resistors. be sure to use only after evaluating under actual load conditions. 3. part numbers with resistors this part number employs a resistor in the coil surge protection circuit; therefore, an external surge protection element is not required. in particular, when a diode is connected in parallel with a coil, the revert time becomes slower which could adversely affect working life. please check the circuit and make sure that a diode is not connected in parallel with the coil drive circuit. all rights rese r v ed c o p y r i gh t matsushita elect r ic w o r k s , ltd.
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