AUTOMOTIVE RELAYS
Twin Relays EN2/EP2 Series
Single Relays EP1/MR301 Series
JC–13003D (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
●Twin relay for motor and solenoid reversible control
●30% Iess relay space than conventional two relays
●Contact switching current of 35 A max.
●High performance and productivity by unique
symmetrical structure
●Flux tight housing
●Delivered in stick-tube for automatic insertion machine
●Washable type available
PART NUMBERS AND COIL RATINGS
Nominal Coil Nominal Must Must Nominal
Voltage Resistance Current Operate Voltage Release Voltage Operate Power
(Vdc) (Ω ± 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)
■ PART NUMBER SYSTEM
EN2-B1N1ST
WiringType
EnclosureCarrying 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 Ω ± 10%
2 : 180 Ω ± 10%
3 : 225 Ω ± 10%
N : Silver oxide complex alloy type I
H : Silver oxide complex alloy type II
3
■ DIMENSIONS mm (inch)
[H Bridge Type] [Separate (T) Type]
■ 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)
φφ
(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)
φφ
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)
567
2
14
8
3
2- 1.5
+0.1
–0
( 0.059)
φ
( 0.075)
φ
φ
2- 1.9
+0.1
–0
φ
4- 1.1
+0.1
–0
( 0.043)
φφ
(Side A) (Side B)
2
(Unit A) (Unit B)
14
9
5
1067
8
3
4- 1.5
+0.1
–0
( 0.059)
φ
( 0.075)
φ
φ
2- 1.9
+0.1
–0
φ
4- 1.1
+0.1
–0
( 0.043)
φφ
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 mΩ 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 MΩ min. (at 500 Vdc) initial
500 Vdc min. (for 1 minute) initial
98 m/s2 [Approx. 10 G] min. (misoperating)
10 to 300 Hz, 43 m/s2 [Approx. 4.4 G] min. (misoperating)
–40˚C to +85˚C (–40˚F to +185 ˚F)
50˚C/W (contact carrying current 0 A)
1 x 106 operations
1 x 105 operations (at 14 Vdc, Motor Load 25 A/7 A)
Approx. 18 gr.
SPECIFICATIONS at 25˚C (77˚F)
4
EP2 Series
FEATURES
●Twin relay for motor and solenoid reversible control
●50% Iess relay space than conventional two relays
●Contact switching current of 25 A max.
●High performance and productivity by unique
symmetrical structure
●Flux tight housing
●Delivered in stick-tube for automatic insertion machine
●Washable type available
PART NUMBERS AND COIL RATINGS
Nominal Coil Nominal Must Must Nominal
Voltage Resistance Current Operate Voltage Release Voltage Operate Power
(Vdc) (Ω ± 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)
■ PART NUMBER SYSTEM
EP2-B3L1ST
WiringType
EnclosureCarrying 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 Ω ± 10%
4 : 300 Ω ± 10%
L : Silver oxide complex alloy type I
N : Silver oxide complex alloy type II
G : Silver oxide complex alloy
(High current type)
5
■ DIMENSIONS mm (inch)
[H Bridge Type] [Separate (T) Type]
■ 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 mΩ 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 MΩ min. (at 500 Vdc) initial
500 Vdc min. (for 1 minute) initial
98 m/s2 [Approx. 10 G] min. (misoperating)
10 to 300 Hz, 43 m/s2 [Approx. 4.4 G] min. (misoperating)
–40˚C to +85˚C (–40˚ F to +185˚F)
50˚C/W (contact carrying current 0 A)
1 x 106 operations
1 x 105 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)
φ
φ
(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)
φ
φ
(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
76
5
4
32
1
( 0.075)
φ
2- 1.9+0.1
–0
φ
( 0.059)
φ
2- 1.5+0.1
–0
φ
( 0.043)
φ
4- 1.1+0.1
–0
φ
(Side A) (Side B)
23
9
4
6
6
10 78
1
( 0.075)
φ
2- 1.9
+0.1
–0
φ
( 0.059)
φ
4- 1.5
+0.1
–0
φ
( 0.043)
φ
4- 1.1
+0.1
–0
φ
(Unit A) (Unit B)
6
EP1 Series
FEATURES
●33% Iess relay space than conventional relays (MR301 Series)
●High performance & productivity by unique structure
●Flux tight housing
●Delivered in stick-tube for automatic insertion machine
●Washable type available
PART NUMBERS AND COIL RATINGS
Nominal Coil Nominal Must Must Nominal
Voltage Resistance Current Operate Voltage Release Voltage Operate Power
(Vdc) (Ω ± 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)
■ 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 Ω ± 10%
4 : 300 Ω ± 10% L : Silver oxide complex alloy
(for Standard)
G : Silver oxide complex alloy
(for High current)
Contact Material
7
■ DIMENSIONS mm (inch)
■ 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 MΩ 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 MΩ min. (at 500 Vdc) initial
500 Vdc min. (for 1 minute) initial
98 m/s2 [Approx. 10 G] min. (misoperating)
10 to 300 Hz, 43 m/s2 [Approx. 4.4 G] min. (misoperating)
50˚C/W (Contact Carrying Current: 0 A)
–40 to +85˚C (–40 to +185˚F)
106 operations
105 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)
φ
φ
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)
φ
2- 1.1
+0.1
–0
φ
( 0.075)
φ
1.9
+0.1
–0
φ
( 0.059)
φ
2- 1.5
+0.1
–0
φ
8
MR301 Series
FEATURES
●Medium load applications such as interval wipers and stereo
●Delivered in stick-tube for automatic insertion machine
●Flux tight housing
●Washable type available
●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) (Ω ± 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)
■ 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)
φ
φ
1.6
( 0.06)
φ
φ
42
1
MR301-6HUSL1.
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 ∗EL2.
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 mΩ max. (measured at 0.5 A) initial 100 mΩ 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 MΩ min. (at 500 Vdc) initial
500 Vdc min. (for 1 minute) initial
98 m/s2 [Approx. 10 G] min. (misoperating)
10 to 300 Hz, 43 m/s2 [Approx. 4.4 G] min. (misoperating)
–40˚C to +85˚C (–40˚F to +185˚F)
50˚C/W (contact carrying current 0 A)
1 x 106 operations
1 x 105 operations (at 14 Vdc, Motor Load 20 A/3 A) (E-Contact)
Approx. 13 gr
SPECIFICATIONS at 25˚C (77˚F)
10
■ 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
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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.
