UL
pending
CSA
pending
LONG LIFE RELAY
NR-RELAYS
FEATURES
20
.787
10
.394
10
.394
mm
inch
• Sealed construction for automatic wave soldering and cleaning
• Latching types available
• High sensitivity — TTL direct drive possible
• High speed — Up to 500 cycle/sec. operations
• Wide switching range and high welding resistance
Gold cobalt (AuCo) contact permits
• Wider switching range from low level up to high current: 10
µ
A to 1 A
• Higher sticking resistance to inrush current
• Stable contact resistance from initial stage throughout life
SPECIFICATIONS
Contact
Arrangement
Initial contact resistance, max.
(By voltage drop 6 V DC 1 A)
Initial contact pressure
Contact material
Contact-
Contact
Sealed type
Magnetically
sealed type
Sealed type
1 Form C
60 m
Ω
Approx. 5 g
.18 oz
Gold cobalt
3 pF
4 pF
4 pF
5 pF
5 pF
6 pF
1A 20 VDC,
0.3A 110 VAC
33 VA, 20 W
110 V AC, 30 V DC
AC 0.3 A, DC 1 A
Approx. 100 mV 10
µ
A
10
9
10
6
(at 1 cps.)
3
×
10
6
(at 2 cps.)
5
×
10
6
(at 5 cps.)
10
7
(at 25 cps.)
5
×
10 (at 50 cps.)
7
Characteristics (at 25
°
C
77
°
F)
Max. operating speed
Initial insulation resistance*
1
Between live parts
and ground
Between open
contact
500 cps. (mechanical)
Min. 1000 M
Ω
at 500 V DC*
2
1,000 Vrms
350 Vrms (500 V DC)
1,000 Vrms
Max. 3 ms (Approx. 1 ms)
Max. 2 ms (Approx. 0.5 ms)
Approx. 0.5 ms
Approx. 0.3 ms
Max. 35
°
C at 0.5 W operating power
Max. 65
°
C at 1 W operating power
Min. 980 m/s
2
{100 G}
Min. 980 m/s
2
{100 G}
98 m/s
2
{10 G}, 10 to 55 Hz
at double amplitude of 1.6 mm*
8
117.6 m/s
2
{12 G}, 10 to 55 Hz
at double amplitude of 2 mm
–55
°
C to +65
°
C*
10
–67
°
F to +149
°
F
5 to 85% R.H.
Approx. 7 g
.25 oz
Initial
breakdown
voltage*
3
Electrostatic
capacitance
N.O.
contact-coil Magnetically
sealed type
Sealed type
N.C.
contact-coil Magnetically
sealed type
Nominal switching capacity
Max. switching power
Max. switching voltage
Max. switching current
Min. switching power
Mechanical (at 500 cps.)
1 A 20 V DC/
0.3 A 110 V AC
0.5 A 30 V DC/
0.1 A 110 V AC
0.25 A 30 V DC/
0.25 A 30 V AC
0.2 A 24 V DC/
0.2 A 24 V AC
0.1 A 12 V DC/
0.1 A 12 V AC
0.1 A 9 V DC/
0.1 A 9 V AC
Between contact
and coil
Operate time*
4
(at nominal voltage)
Release time (without diode)*
4
(at nominal voltage)
Contact Single side stable
bounce
1-coil /2-coil latching
time
Temperature rise
Shock resistance
Functional*
5
Destructive*
6
Functional*
7
Destructive
Rating
(resistive)
Vibration
resistance
Expected
life (min.
operations)
Electrical
(resistive)
Conditions for opera- Ambient
tion, transport and
temp.
storage*
9
(Not freez-
ing and condensing
Humidity
at low temperature)
Unit weight
Remarks
*
*
1
*
2
*
3
*
4
*
5
*
6
*
7
*
8
10
8
(at 100 cps.)
Coil (polarized) (at 25
°
C
77
°
F)
Minimum operting power
Single side stable
1 coil latching
2 coil latching
Single side stable
1 coil latching
2 coil latching
72 to 133 mW
41 to 45 mW
72 to 107 mW
147 to 300 mW
74 to 153 mW
147 to 331 mW
*
9
*
10
Nominal operating power
Specifications will vary with foreign standards certification ratings.
Measurement at same location as "Initial breakdown voltage" section
Min. 500M
Ω
at 100 V DC between coils of 2 coil latching type
Detection current: 10mA, Except for between coils of 2 coil latching type
Excluding contact bounce time
Half-wave pulse of sine wave: 6ms; detection time: 10
µ
s
Half-wave pulse of sine wave: 6ms
Detection time: 10
µ
s
Although NR relays are rated at 10 G/55 cps. vibration resistance, they will with-
stand up to 60 G/2,000 cps., provided they receive additional support such as
anchoring to the PC board with epoxy resin.
Refer to 5. Conditions for operation, transport and storage mentioned in
AMBIENT ENVIRONMENT (Page 61)
Total temperature (ambient temperature plus temperature rise in coil) should not
exceed 90
°
C
194
°
F
for single side stable, and 105
°
C
221
°
F
for latching relays.
See Reference Data for determination of coil voltage versus temperature.
112
NR
TYPICAL APPLICATIONS
Telecommunications equipment, alarm
devices, machine tools, NC machines, au-
tomatic warehouse control, conveyors,
air-conditioners, pressing machines, tex-
tile machinery, elevators, control panels,
pin-board programmers, parking meters,
industrial robots, detectors, annunciators,
optical instruments, business machines,
time recorders, cash registers, copiers,
vending machines, medical equipment.
ORDERING INFORMATION
EX. NR-
H
L2
D
12V
Types of case
H: Sealed
S: Magnetically sealed
Operating function
Nil: Single side stable
L: 1 coil latching
L2: 2 coil latching
Coil voltage (DC)
5, 6, 12, 24, 42 V
(Notes) 1. Power types and 1 Form A types are available on request.
(Notes)
2. For UL/CSA recognized types, delete “N” at head portion of part No. and add suffix UL/CSA, when ordering. Ex. RSD-12V UL/CSA
(Notes)
3. Standard packing Carton: 50 pcs., Case: 500 pcs.
TYPES AND COIL DATA (at 25
°
C
77
°
F)
Single side stable (NR-SD)
Nominal coil
voltage, V DC
5
6
12
24
42
Pick-up voltage,
V DC (max.)
3.5
4.7
9.3
16
28
Drop-out voltage
V DC (min.)
0.5
0.6
1.2
2.4
4.2
Maximum
allowable voltage,
V DC (40
°
C
104°F)
13
14
28
42
85
Coil resistance,
Ω
(
±
10%)
170
220
890
2,000
8,000
Nominal operating
power, mW
147
164
162
288
221
Inductance,
Henrys
0.050
0.075
0.3
0.66
2.7
1 coil latching (NR-SLD)
Nominal coil voltage,
V DC
5
6
12
24
42
Pick-up voltage,
V DC (max.)
3.5
4.3
8.0
17
23
Maximum allowable
voltage,
V DC (40
°
C
104°F)
18
20
30
75
110
Coil resistance,
Ω
(
±
10%)
340
450
1,500
6,000
12,000
Nominal operating
power, mW
74
80
96
96
147
Inductance,
Henrys
0.12
0.16
0.66
2.4
3.9
2 coil latching (NR-SL2D)
Nominal coil voltage,
V DC
5
6
12
24
42
Pick-up voltage,
V DC (max.)
3.5
4.3
8.0
17.0
23.0
Maximum allowable
voltage,
V DC (40
°
C
104°F)
13.0
14.0
26.0
50.0
75.0
Coil resistance,
Ω
(
±
10%)
Set coil
170
225
650
2,700
5,500
Reset coil
170
225
650
2,700
5,500
Nominal operating
power, mW
147
160
230
213
321
Inductance,
Henrys
0.024
0.04
0.14
0.35
0.8
(Note) Maximum allowable operating power: 1000 mW at 25
°
C
77
°
F.
DIMENSIONS
20
.787
10
.394
2.54
.100
Ground terminal
5
10
.394
3.5
.138
2.54 5.1 5.1 5.1
.100 .201 .201 .201
5.1
.201
6
7
mm
inch
Terminal dimensions (Except soldering)
Terminal No.
1, 7
Thickness
0.5
.020
0.3
.012
Width
0.6
.024
0.7
.028
3
.118
4
3
2.54
.100
2
1.3 DIA.
.051 DIA.
1
4
2, 3, 5, 6,
ground terminal
0.5 DIA.
.020 DIA.
Soldering: 0.3
.012
max.
General tolerance:
±
0.5
±
.020
Tolerance:
±
0.2
±
.008
113
NR
DIFFERENCES BETWEEN NR RELAYS AND REED RELAYS
NR relays
Reed relays
Structure
"Getter" holes are formed on both pole
shoes to obtain uniform contact resis-
tance throughout life. Film-forming phe-
nomena on contacts is thus fully
prevented.
Contact arrangement
Contact capacity
Operating function
"Getter" hole
1 Form C
20 W (high contact pressure)
Single side stable
Latching
Yes
1 Form A or 1 Form B
5 to 15 W
Single side stable
No
REFERENCE DATA
1.-(1) Contact reliability
Test sample: NR-SD-24V 54 pcs.
Circuits: (A) Following figure with diode
(B) Following figure without diode
Start
Stop
R
0
24 V DC
R
54
R
2
R
1
R
2
R
3
R
52
R
53
R
53
R
54
1.-(2) Contact reliability
TEST CONDITION
Sample: NR-SD-24V, 10 pcs.
Contact voltage: 100 mV
Contact current: 10
µ
A
Cycle rate: 50 cps.
Detection level: 100
Ω
Testing operation: 3
×
10
7
m = 1.9
σ
= 2.5
×
10
7
µ
= 4.7
×
10
7
95% reliability limit: 1.15
×
10
7
(Mean time between failure)
F(t)(%)
99.9
99.0
95.0
70.0
50.0
30.0
10.0
5.0
2.0
1.0
0.5
0.2
0.1
1
No. of operations,
×10
7
2. Coil temperature rise
(under saturated condition)
100
Coil temperature rise,
°C
90
80
70
60
50
40
30
20
10
250
500
750
1,000 1,250
Plastic
sealed type
Magnetically
sealed type
R
0
R
1
Item to be checked: Detect with the circuit stopped
Circuits:
(A) Diode provided: The circuit does not stop through-
out 100 million times.
(B) Diode not provided:
λ
60
= 2.5
×
10
-8
times
Operating power, mW
5
10
(WEIBULL)
3.-(1) Operate time including bounce time
(Single side stable)
3.0
2.5
Operate time, ms
3.-(2) Operate time including bounce time
(2 coil latching)
3.0
2.5
Operate time, ms
2.0
1.5
1.0
0.5
0
Max.
x
Min.
180
4. Release time including bounce time
(Single side stable)
3.0
2.5
2.0
1.5
1.0
0.5
x
Min.
0
2.0
1.5
1.0
0.5
0
Max.
x
Min.
Release time, ms
Max.
60
100
140
180
220
60
100
140
220
60
100
140
180
220
Coil applied voltage, %V
Coil applied voltage, %V
Coil applied voltage, %V
114
NR
5.-(1) Leaving at high temperature
(Change of pick-up and drop-out voltages)
Tested sample: NR-SD-24V, 30 pcs.
Condition: Deenergized leaving at 90
°
C
194
°
F
(constant temperature)
20
18
16
Voltage, V
Pick-up voltage
14
12
10
8
6
4
2
500
1,000
Time, hr
Min.
100
1,000
Time, hr
10,000
Drop out voltage
Max.
x
Max.
x
Min.
5.-(2) Leaving at high temperature
(Change of contact resistance)
Tested sample: NR-SD-24V, 30 pcs.
Condition: Deenergized leaving at 90
°
C
194
°
F
(constant temperature)
1,000
Contact resistance, mΩ
500
N.C. side contact
N.O. side contact
6. High frequency characteristics
Tested sample: NR-SD-24V
Tested condition:
SG(Signal generator)
A
B
N.O.
N.C.
50Ω
50Ω
Max.
100
50
Max.
Isolation, dB
Min.
Min.
–100
–50
Isolation loss between
A and B is measured.
1,500
5
10
50
100
Frequency, MHz
7. Contact sticking resistance
TEST CONDITION
The purpose of this test was to confirm contact stick-
ing resistance and contact stability against coil rip-
ples.
Tested Sample: NR-SD-24V, 10 pcs.
Test method: Following coil ripples were applied.
Test period: 500 hours
24 V DC
100 Hz
7 V DC
8. Distribution of contact resistance
TEST RESULT
No occurance of sticking was observed.
Contact resistance: Fig. 1
NR-SD-24V: 29 m
Ω
to 30.4 m
Ω
Contact resistance mΩ
50
100
Quantity
40
30
20
10
100
1,000
Energization time, Hr Fig. 1
10
50
Max.
x
Min.
Tested sample: NR-SD-24V (WG type) 105 pcs.
x = 24.2 mΩ
3σ = 9.27 mΩ
In actual application, above coil ripples should be
avoided and use of a capacitor in the circuit is recom-
mended to keep the ripple factor below 5%.
10
20
30
40
50
Contact resistance, mΩ
9.-(1) Rate of change in pick-up and drop-out
voltage (Single side stable)
9.-(2) Rate of change in pick-up voltage
(2 coil latching)
10.-(1) Mechanical life
(Change of pick-up and drop-out V)
Tested Sample: NR-SD-24V, 10 pcs.
Operation frequency: 500 cps
Pick-up/drop-out Voltage, V
180
Rate of change, %
160
140
120
100
80
60
40
20
Rate of change, %
Drop-out
voltage
180
160
140
120
100
80
60
40
20
Pick-up
voltage
15
Pick-up Voltage
Max.
Pick-up
voltage
10
Min.
Drop-out Voltage
5
Max.
Min.
–40 –20 0
20 40 60 80 100
–30 –10 10 30 50 70 90
Ambient temperature,
°C
–40 –20 0
20 40 60 80 100
–30 –10 10 30 50 70 90
Ambient temperature,
°C
1,000
10,000
4
100,000
No. of operations,
×10
10.-(2) Mechanical life
(Change of contact resistance)
Tested Sample: NR-SD-24V, 10 pcs.
Operation frequency: 500 cps
90
Contact resistance, mΩ
80
70
60
50
40
30
20
10
1,000
10,000
4
11.-(1) Electrical life
(1 A 20 V DC resistive load)
Tested sample: NR-SD-24V, 10 pcs.
F(t)(%)
99.9
99.0
95.0
70.0
50.0
30.0
10.0
5.0
Max.
Min.
2.0
1.0
0.5
0.2
0.1
100,000
η:
1.85×10
6
µ:
1.65×10
6
σ:
5.64×10
4
(Weibull probability paper)
1
5
4
11.-(2) Electrical life
Tested Sample: NR-SD-24V, 10 pcs.
Load: 60 mA 24 V DC resistive load
Frequency: 50 cps
N.C. side
N.O. side
150
Contact resistance, mΩ
10
N.C. side
N.O. side
100
50
100
1,000
4
1,0000
No. of operations,
×10
No. of operations,
×10
No. of operations,
×10
115
NR
11.-(3) Electrical life
Tested Sample: NR-SD-12V, 10 pcs.
Load: 54 mA 12 V DC inductive load
with diode protection
(4 relay coils in parallel of NR-SD-12V)
Frequency: 50 cps
1,000
Contact resistance, mΩ
Pick-up/drop-out voltage, V
24 V DC
L
1
Pick-up voltage
12
Max.
x
Min.
Contact resistance, mΩ
L1~L6: HP2-DC24V
×
6 pcs. in parallel
Diode protector provided
L
2
L
3
L
4
L
5
L
6
11.-(4)Electrical life
(327 mA 24 V DC relay coil load)
Tested sample: NR-SD-24V, 5 pcs.
Condition: HP2-DC24×6 pcs. in parallel,
diode protector provided
NR relay contact
16
100
Max.
100
80
60
40
20
8
Drop-out voltage
4
Max.
x
Min.
100
200
300
4
Max.
x
Min.
100
200
300
Min.
1,000
10,000
4
0
No. of operations,
×10
No. of operations,
×10
No. of operations,
×10
4
12. Thermal electro motive force
Tested Sample: NR-SD-12V, 5 pcs.
Coil applied V: 12 V DC
Ambient atmosphere: 25°C
77°F,
60% RH
200
13. High temperature test
TEST CONDITION
Tested Sample: NR-SD-24V, 30 pcs.
Ambient temperature: 80°C
176°F
Humidity: less than 50% R.H.
Exposure time: 2,000 hours with relays deenergized.
14. Influence of adjacent mounting
Distance
Type
Magnetically
shielded type
Sealed type
0
(0)
±5%
—
mm
inch
5
10
15
(.197) (.394) (.591)
±1%
0
0
±2%
TEST RESULT
Thermal EMF,
µV
Contact resistance: Fig. 1
All samples were measured less than
100 mΩ in contact resistance throughout this test.
100
±10% ±6%
15. Resistive load test
TEST CONDITION
Tested Sample: NR-SD-24V, 10 pcs.
Load: 1 A 20 V DC Resistive
Cycle rate: 1.4 cps.
Contact resistance in life test
Contact resistance, mΩ
N.C.
N.O.
Contact resistance, mΩ
500
N.C.
N.O.
2
4
6
8
10
Hour
12
14
16
100
80
60
40
20
10
Max.
Min.
1,000 2,000
100
Exposure time, hr
Max.
100
Max.
Max.
Mean value
of N.O.
Mean value
of N.C.
Min.
Min.
1
2
5
10
15
50
20
No. of operations,
×10
6
APPLICATION HINTS
Contact protection circuit
When using NR relays in inductive load circuits, a contact protection circuit is recommended.
Examples:
CR
S
CR
Relay contact
S
Diode
S
r
r
c
L
c
L
L
L : Inductive load
1. r = more than 20 to 30 ohms
2. In an AC circuit impedance of L is to be
somewhat smaller than impedance of r
and c.
Can be used for both AC and DC circuits.
Use 500 to 1000 ohms for r and 0.1
µF
to
0.2
µF
200 V for c in a general 12 to 24 V
load circuit.
For DC circuits only.
116
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