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automotive relays twin relays en2/ep2 series single relays ep1/MR301 series jcC13003d (5th edition) august 1995 m printed in japan 1992
2 description en2 series the en2, ep2, epi and MR301 series power relays can meet the requirements of high quality and reliability in automotive eiectronics applications. the en2 and ep2 series are the twin relays which have two units in one package and smaller than conventional two relays. these relays are divided into two types for different usage. one is h bridge type and the other is separate type. the en2 series is suitable for heavy load applications (35 a max.). the ep2 series is designed for medium load applications (25 a max.). the ep1 and MR301 series are the 1c contact form relays. many of these relays have been used in automotive electronics applications throughout the world. features l twin relay for motor and solenoid reversible control l 30% iess relay space than conventional two relays l contact switching current of 35 a max. l high performance and productivity by unique symmetrical structure l flux tight housing l delivered in stick-tube for automatic insertion machine l washable type available part numbers and coil ratings nominal coil nominal must must nominal voltage resistance current operate voltage release voltage operate power (vdc) ( w 10%) (ma) (vdc max.) (vdc min.) (w) 12 125 96.0 6.5 0.6 1.15 12 125 96.0 7.0 0.6 1.15 12 180 67.0 7.5 0.6 0.8 12 180 67.0 8.0 0.6 0.8 12 250 53.0 8.0 0.9 0.64 12 250 53.0 8.5 0.9 0.64 part numbers h bridge type separate type en2-1n1s en2-1n1st en2-1n2s en2-1n2st en2-2n3s en2-2n3st en2-2n4s en2-2n4st en2-3n4s en2-3n4st en2-3n5s en2-3n5st at 25?c (77?f) n part number system en2-b1n1st wiring type enclosure carrying current capacity contact material operate voltage (at 25 c) coil resistance (at 25 c) nil : h bridge type t : sparate type nil : unsealed s : ssaled 1 : 6.5 v max. 2 : 7.0 v max. 3 : 7.5 v max. 4 : 8.0 v max. 5 : 8.5 v max. nil : standard type b : high current type 1 : 125 w 10% 2 : 180 w 10% 3 : 225 w 10% n : silver oxide complex alloy type i h : silver oxide complex alloy type ii
3 n dimensions mm (inch) [h bridge type] [separate (t) type] n pcb pad layout and schematics (bottom view) mm (inch) [h bridge type] [separate (t) type] 33.0 0.5 (1.3) 2-0.5 1.1 2-1.3 1.3 (0.02 0.05) 4- 0.6 ( 0.02) ff (0.02 0.04) 5.75 10.75 14.1 (0.23) 5.75 (0.23) 10.75 (0.42) 14.1 (0.56) (0.42) (0.56) 16.0 0.5 (0.63) 16.0 0.5 2.7 5.45 5.45 (0.21) 6.4 (0.11) 2.7 (0.11) 3.1 (0.12) (0.21) (0.25) 0.6(0.02) 35 (0.63) (0.14) 33.0 0.5 (1.3) 4-0.5 1.1 (0.02 0.04) 2-1.3 1.3 (0.02 0.05) 4- 0.6 ( 0.02) ff 5.75 10.75 14.1 (0.23) 5.75 (0.23) 10.75 14.1 (0.42) (0.56) (0.42) (0.56) 16.0 0.5 (0.63) 16.0 0.5 2.7 5.45 5.45 6.4 (0.25) (0.21) 6.4 (0.11) 3.1 (0.12) 2.7 (0.11) 3.1 (0.12) (0.21) (0.25) 0.6(0.02) 35 (0.63) (0.14) 5 67 2 14 8 3 2- 1.5 +0.1 ? ( 0.059) f ( 0.075) f f 2- 1.9 +0.1 ? f 4- 1.1 +0.1 ? ( 0.043) f f (side a) (side b) 2 (unit a) (unit b) 1 4 9 5 10 67 8 3 4- 1.5 +0.1 ? ( 0.059) f ( 0.075) f f 2- 1.9 +0.1 ? f 4- 1.1 +0.1 ? ( 0.043) f f items contact form contact material contact resistance contact switching voltage contact switching current contact carrying current standard high operate time release time nominal operate power insulation resistance breakdown voltage shock resistance vibration resistance ambient temperature coil temperature rise life expectancy mechanical electrical weight specification 1 form c 2 [h bridge type & separate type] silver oxide complex alloy (special types available) 50 m w max. (measured at 7 a) initial 30 vdc max. 5 vdc min. 35 a max. (at 16 vdc) 1 a min. 25 a max. (2 minutes max.) (at 12 vdc, 85?c) 35 a max. (2 minutes max.) (at 12 vdc, 85?c} approx. 5 ms max. (at 12 vdc, excluding bounce) initial approx. 2 ms max. (at 12 vdc, excluding bounce) initial, without diode 0.64 w/0.8 w/1.15 w (at 12 vdc) 100 m w min. (at 500 vdc) initial 500 vdc min. (for 1 minute) initial 98 m/s 2 [approx. 10 g] min. (misoperating) 10 to 300 hz, 43 m/s 2 [approx. 4.4 g] min. (misoperating) C40?c to +85?c (C40?f to +185 ?f) 50?c/w (contact carrying current 0 a) 1 x 10 6 operations 1 x 10 5 operations (at 14 vdc, motor load 25 a/7 a) approx. 18 gr. specifications at 25?c (77?f)
4 ep2 series features l twin relay for motor and solenoid reversible control l 50% iess relay space than conventional two relays l contact switching current of 25 a max. l high performance and productivity by unique symmetrical structure l flux tight housing l delivered in stick-tube for automatic insertion machine l washable type available part numbers and coil ratings nominal coil nominal must must nominal voltage resistance current operate voltage release voltage operate power (vdc) ( w 10%) (ma) (vdc max.) (vdc min.) (w) 12 225 53.3 6.5 0.9 0.64 12 225 53.3 7.0 0.9 0.64 12 225 53.3 7.5 0.9 0.64 12 300 40.0 7.5 0.9 0.48 12 300 40.0 8.0 0.9 0.48 12 300 40.0 8.5 0.9 0.48 part numbers h bridge type separate type ep2-3n1s ep2-3n1st ep2-3n2s ep2-3n2st ep2-3n3s ep2-3n3st ep2-4n3s ep2-4n3st ep2-4n4s ep2-4n4st ep2-4n5s ep2-4n5st at 25?c (77?f) n part number system ep2-b3l1st wiring type enclosure carrying current capacity contact material operate voltage (at 25 c) coil resistance (at 25 c) nil : h bridge type t : sparate type nil : unsealed s : ssaled 1 : 6.5 v max. 2 : 7.0 v max. 3 : 7.5 v max. 4 : 8.0 v max. 5 : 8.5 v max. nil : standard type b : high current type 3 : 225 w 10% 4 : 300 w 10% l : silver oxide complex alloy type i n : silver oxide complex alloy type ii g : silver oxide complex alloy (high current type)
5 n dimensions mm (inch) [h bridge type] [separate (t) type] n pcb pad layout and schematics (bottom view) mm (inch) [h bridge type] [separate (t) type] items contact form contact material contact resistance contact switching voltage contact switching current contact carrying current standard high operate time release time nominal operate power insulation resistance breakdown voltage shock resistance vibration resistance ambient temperature coil temperature rise life expectancy mechanical electrical weight specification 1 form c 2 [h bridge type & separate type] silver oxide complex alloy (special types available) 50 m w max. (measured at 7 a) initial 30 vdc max. 5 vdc min. 25 a max. (at 16 vdc) 1 a min. 20 a max. (2 minutes max.) (at 12 vdc, 85?c) 25 a max. (2 minutes max.) (at 12 vdc, 85?c) approx. 5 ms max. (at 12 vdc, excluding bounce) initial approx. 2 ms max. (at 12 vdc, excluding bounce) initial, without diode 0.48 w/0.64 w (at 12 vdc) 100 m w min. (at 500 vdc) initial 500 vdc min. (for 1 minute) initial 98 m/s 2 [approx. 10 g] min. (misoperating) 10 to 300 hz, 43 m/s 2 [approx. 4.4 g] min. (misoperating) C40?c to +85?c (C40? f to +185?f) 50?c/ w (contact carrying current 0 a) 1 x 10 6 operations 1 x 10 5 operations (at 14 vdc, motor load 20 a/3 a) approx. 15 gr. specifications at 25?c (77?f) 2-1.3 1.3 2-0.5 1.1 (0.02 0.04) 4- 0.6 ( 0.02) f f (0.05 0.05) 3.5 8.0 (0.31) 10.1 (0.4) (0.14) (0.14) 3.5 8.0 (0.31) 10.1 (0.4) 16.2 0.5 (0.64) 23.8 0.5 (0.94) 16.0 0.5 2.2(0.09) 3.1(0.12) 5.45 (0.21) 6.4 (0.25) 2.2 (0.09) 5.45 (0.21) 0.5(0.02) 35 (0.63) (0.14) 2-1.3 1.3 4-0.5 1.1 (0.02 0.04) 4- 0.6 ( 0.02) f f (0.05 0.05) 3.5 8.0 (0.31) 10.1 (0.4) (0.14) (0.14) 3.5 8.0 (0.31) 10.1 (0.4) 16.2 0.5 (0.64) 23.8 0.5 (0.94) 16.0 0.5 2.2 (0.09) 3.1(0.12) 5.45 (0.21) 6.4 (0.25) 2.2 3.1 (0.09) (0.12) 5.45 (0.21) 6.4 (0.25) 0.5(0.02) 35 (0.63) (0.14) 8 7 6 5 4 3 2 1 ( 0.075) f 2- 1.9 +0.1 ? f ( 0.059) f 2- 1.5 +0.1 ? f ( 0.043) f 4- 1.1 +0.1 ? f (side a) (side b) 23 9 4 6 6 10 7 8 1 ( 0.075) f 2- 1.9 +0.1 ? f ( 0.059) f 4- 1.5 +0.1 ? f ( 0.043) f 4- 1.1 +0.1 ? f (unit a) (unit b)
6 ep1 series features l 33% iess relay space than conventional relays (MR301 series) l high performance & productivity by unique structure l flux tight housing l delivered in stick-tube for automatic insertion machine l washable type available part numbers and coil ratings nominal coil nominal must must nominal voltage resistance current operate voltage release voltage operate power (vdc) ( w 10%) (ma) (vdc max.) (vdc min.) (w) 12 225 53.3 6.5 0.9 0.64 12 225 53.3 7.0 0.9 0.64 12 225 53.3 7.5 0.9 0.64 12 300 40.0 7.5 0.9 0.48 12 300 40.0 8.0 0.9 0.48 12 300 40.0 8.5 0.9 0.48 part numbers standard high current type type ep1-3l1 ep1-b3g1 ep1-3l2 ep1-b3g2 ep1-3l3 ep1-b3g3 ep1-4l3 ep1-b4g3 ep1-4l4 ep1-b4g4 ep1-4l5 ep1-b4g5 at 25?c (77?f) n part number system ep1-b3l1s type enclosure load current capability operate voltage (at 25 c) coil resistance (at 25 c) null : unsealed s : sealed 1 : 6.5 v max. 2 : 7.0 v max. 3 : 7.5 v max. 4 : 8.0 v max. 5 : 8.5 v max. nulll : standard b : high current 3 : 225 w 10% 4 : 300 w 10% l : silver oxide complex alloy (for standard) g : silver oxide complex alloy (for high current) contact material
7 n dimensions mm (inch) n pcb pad layout and schematics (bottom view) mm (inch) items contact form contact material contact resistance contact switching voltage contact switching current contact carrying current standard high operate time (excluding bounce) release time (excluding bounce) nominal operate power insulation resistance breakdown voltage shock resistance vibration resistance coil temperature rise ambient temperature life expectancy mechanical electrical weight specification 1 form c silver oxide complex alloy 50 m w max. (measured at 7 a) initial 30 vdc max. 5 vdc min. 25 a max. (at 16 vdc) 1 a min. 25 a max. (2 minutes max.) (at 12 vdc, 85?c) 30 a max. (2 minutes max.) (at 12 vdc, 85?c) approx. 5 ms max. (at 12 vdc) initial approx. 2 ms max. (at 12 vdc) initial, without diode 0.48 w/0.64 w (at 12 vdc) 100 m w min. (at 500 vdc) initial 500 vdc min. (for 1 minute) initial 98 m/s 2 [approx. 10 g] min. (misoperating) 10 to 300 hz, 43 m/s 2 [approx. 4.4 g] min. (misoperating) 50?c/ w (contact carrying current: 0 a) C40 to +85?c (C40 to +185?f) 10 6 operations 10 5 operations (at 14 vdc, motor load 20 a/3 a) approx. 8 g specifications at 25?c (77?f) 14.6 0.5 10.1 (0.4) 1.3 1.3 (0.05 0.05) 2-0.5 1.1 (0.02 0.04) 2- 0.6 ( 0.02) f f 2.65 (0.1) 5.45 (0.21) 0.5 (0.02) 6.4 (0.25) 3.1 (0.12) 16.0 0.5 (0.63) 3.5 (0.14) 2.2 (0.09) 4.5 (0.18) 3.5 (0.14) (0.59) 16.2 0.5 (0.64) 1 23 4 5 ( 0.043) f 2- 1.1 +0.1 ? f ( 0.075) f 1.9 +0.1 ? f ( 0.059) f 2- 1.5 +0.1 ? f
8 MR301 series features l medium load applications such as interval wipers and stereo l delivered in stick-tube for automatic insertion machine l flux tight housing l washable type available l high standoff type (0.8 mm) available (l suffix) part numbers and coil ratings nominal coil nominal must must nominal voltage resistance current operate voltage release voltage operate power (vdc) ( w 10%) (ma) (vdc max.) (vdc min.) (w) 6 100 60 4.2 0.6 0.36 9 225 40 6.3 0.9 0.36 12 320 38 8.0 1.2 0.45 12 400 30 8.4 1.2 0.36 part numbers 5 a type 10 a type 15 a type MR301-6sl MR301-6hsl MR301-6esl MR301-9sl MR301-9hsl MR301-9esl MR301-n39l MR301-n40l MR301-n40el MR301-12sl MR301-12hsl MR301-12esl at 25?c (77?f) n numbering system dimensions mm (inch) 5 schematic (bottom view) pcb pad layout mm (inch) (bottom view) 3 12.2 (0.08) 12 (0.47) 2 (0.08) 22.5 (0.89) max. 16.5 (0.65) max. 16.7(0.66)max. ' l:17.0max. " 3.5 (0.14) ' l:3.0 " 0.3 (0.01) ' l:0.8 " 2.3 (0.09) 2.3 (0.09) 12.2 (0.48) 2 (0.08) 12 (0.47) 1.8 ( 0.07) f f 1.6 ( 0.06) f f 42 1 MR301-6husl 1. type cover nominal coil voltage (at 25 c) enclosure contacts nil : 16.7 mm max. height (including 0.3 mm stand off) color ?black l : 17.0 mm max. height (including 0.8 mm stand off) color ?gray nil : unsealed s : sealed 6 : 6 v, dc 9 : 9 v, dc 12 : 12 v, dc hil : 5 a type h : 10 a type e : 15 a type (e type is not recognized by ul and csa) nil : standard type u : ul, csa recognized type MR301-n * el 2. type cover custom code contacts the same to item no.1 nil : 5 a or 10 a type e : 15 a type recognition
9 items contact form contact material contact resistance contact switching voltage contact switching current contact carrying current operate time release time nominal operate power insulation resistance breakdown voltage shock resistance vibration resistance ambient temperature coil temperature rise life expectancy mechanical electrical weight 5 a type 10/15 a type 1 form c silver nickel alloy silver oxide complex alloy 100 m w max. (measured at 0.5 a) initial 100 m w max. (measured at 2 a) initial 30 vdc max. 5 vdc min. 5 a max. (at 16 vdc) 0.1 a min. 15/20 a max. (at 16 vdc) 1 a min. 20 a max. (at 12 vdc) approx. 5 ms max. (at i 2 vdc, excluding bounce) initial approx. 2 ms max. (at i 2 vdc, excluding bounce) initial, without diode 0.36 w/0.45 w (nominal voltage) 100 m w min. (at 500 vdc) initial 500 vdc min. (for 1 minute) initial 98 m/s 2 [approx. 10 g] min. (misoperating) 10 to 300 hz, 43 m/s 2 [approx. 4.4 g] min. (misoperating) C40?c to +85?c (C40?f to +185?f) 50?c/ w (contact carrying current 0 a) 1 x 10 6 operations 1 x 10 5 operations (at 14 vdc, motor load 20 a/3 a) (e-contact) approx. 13 gr specifications at 25?c (77?f)
10 n notice (1) capacitive load if the load is capacitive, an inrush current to charge the load with poses a problem. in this case, a current-limiting resistor or surge suppressor coil is connected in series to the contacts to suppress the peak current. (2) clinching terminals to secure the relay temporarily to a printed circuit board for soldering, particular terminals are allowed to be clinched within a particular angle. other terminals, never clinched. the terminal numbers and the angle for clinching of each series are as follows. 1) no.4 and no.5 terminals to 45 maximum for h bridge type of en2 and ep2 2) no.5 and no.9 terminals to 45 maximum for separate type of en2 and ep2 3) no.4 and no.5 terminals to 45 maximum for ep1 4) no.1, 4 and no.5 terminals to 45 maximum for MR301 (3) drive circuit since the coil of a relay has an inductive impedance, a counter electromotive force is generated when the circuit is opened. this voltage may damage the relay driver ic. therefore, a diode is connected in parallel with the coil, as shown in figure 1. 100 ms min. tr1 tr2 m figure 1 motor tr1 off off on off off on tr2 stop forward reverse (4) typical application for en2/ep2 relays (h bridge type)
11 transmission control interval wiper auto-door mirror automotive telephone window lifter car skid protection control car body height control antenna lifter car stereo air conditioner auto-speed control drive central door interlock auto-seat positioning passive seat belt control sliding roof control applications
no part of this document may be copied in any form or by any means without the prior written consent of nec corporation. nec corporation does not assume any liability for infringement of patents, copyrights or other intellectual property rights of third parties by or arising from use of a device described herein or any other liability arising from use of such device. no license, either express, implied or otherwise, is granted under any patents, copyrights or other intellectual property rights of nec corporation or of others.

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