127
REED SWITCH
ORT551
Ultraminiature Transfer
nGENERAL DESCRIPTION
nFEATURES
nEXTERNAL DIMENSIONS (Unit: mm)
nAPPLICATIONS
l Automotive electronic devices
l Control equipment
l Communication equipment
l Measurement equipment
l Household appliances
56.1±0.3
MAX 14.0
f0.5 MAXf2.54 f0.5
51.6±0.3
f0.5
N.C
N.O
J2R0024-41-31
The OR551 is a ultraminiature two-contacts reed switch designed for transfer type operation.
The contacts are sealed within the glass tube with inert gas to maintain contact reliability.
(1) Reed contacts are hermetically sealed within a glass tube with inert gas and do not receive
any influence from the external atmospheric environment.
(2) Quick response
(3) The structure comprises the operating parts and electrical circuits arranged coaxially. Reed
switches are suited to applications in radio frequency operation.
(4) Reed switches are compact and light weight.
(5) Superior corrosion resistance and wear resistance of the contacts assures stable switching
operation and long life.
(6) With a permanent magnet installed, reed switches economically and easily become
proximity switches.
128
n
Parameter
Pull-in Value (PI)
Drop-out Value (DO)
Contact resistance (CR)
Breakdown voltage
Insulation resistance
Electrostatic capacitance
Contact rating
Maximum switching voltage
Maximum switching current
Maximum carry current
Rated value
Unit
AT
AT
mW
VDC
VDC
W
pF
VA
V
A
A
(1) Drop-out Value vs. Pull-in Value (2) Contact resistance
99.9
99
95
90
80
70
60
50
40
30
20
10
5
1
0.1
Cumulative frequency percent (%)
N.O
N.C
(Measurement length: 30mm)
Contact resistance
AT
50
40
30
20
10
010 20 30 40 50 AT
Drop-out Value
Pull-in Value
l ORT551
40 60 80 100 mW
10〜30
4min
100max
200min (PI≧20)
109min
1.5max
3
0.2
0.5
30（ ）
DC
AC
150min (PI＜20)
ELECTRICAL CHARACTERISTICS
129
(3) Breakdown voltage (4) Insulation resistance
(5) Electrostatic capacitance
99.9
99
95
90
80
70
60
50
40
30
20
10
5
1
（DC 100V）
0.1
10
10
10
11
10
12
10
13
10 W
9
Cumulative frequency percent
Insulation resistance
10 20 30 40 50 AT
pF
（1MHz）
1.5
1.0
0.5
0
Electrostatic capacitance
Pull-in Value
10 20 30 40 50 AT
400
300
200
100
0
DC：V
Breakdown voltage
Pull-in Value
ORT551 l
130
Parameter
Operate time
Bounce time
Release time
Resonant frequency
Maximum operating frequency
Rated value
1.0max
NO 1.0max
0.5max
6000±4000
200
Unit
ms
ms
ms
Hz
Hz
NC 1.5max ms
(1) Operate time (2) Bounce time
(3)Releasetime (4)Resonantfrequency
99.9
99
95
90
80
70
60
50
40
30
20
10
5
1
0.1
Cumulative frequency percent
N.O
N.C
Bounce time
(25Hz: 100AT energized)
0.5
0.4
0.3
0.2
0.1
010 20 30 40 50 AT
ms
Pull-in Value
Operate time
(25Hz: 100AT energized)
AT
30
20
10
0510152025
Release time
Drop-out Value
(25Hz: 100AT energized)
ms
lORT551
99.9
99
95
90
80
70
60
50
40
30
20
10
5
1
Cumulative frequency percent
0.1
Resonant frequency
0.5 1.0 1.5 ms
0
2000 6000 10000 Hz
nOPERATING CHARACTERISTICS
131
nMECHANICAL CHARACTERISTICS
(1) Lead tensile test (static load) (2) Lead tensile strength
n
(1) Temperature characteristics
99.9
99
95
90
80
70
60
50
40
30
20
10
5
1
0.1
Cumulative frequency percent (%)
Breaking load
AT
60
50
40
30
20
10
0
80
60
40
PI
CR
DO
（2.27kg-10sec）
CR
N.O N .C
Pull-in Value ･ Drop-out ValueContact resistance
Before test After test
mW
ORT551 l
％
40
30
20
10
0
−10
−20
−30
CR
DO
PI
Rate of change percent
Temperature
2468
10kg
−40 −20 0 20 40 60 80 100 120
℃
ENVIRONMENTAL CHARACTERISTICS
132
l ORT551
(2) Temperature cycle (3) Temperature and humidity cycle
(4) High temperature storage test (5) Low temperature storage test
AT
60
50
40
30
20
10
0
80
60
40
PI
CR
DO
CR
N.O N .C
mW
(-
55℃〜
+
125℃
)
AT
60
50
40
30
20
10
0
80
60
40
PI
CR
DO
CR
N.ON.C
Pull-in Value • Drop-out ValueContact resistance
Pull-in Value • Drop-out ValueContact resistance
Pull-in Value • Drop-out ValueContact resistance
Pull-in Value • Drop-out ValueContact resistance
Before test After test Before test After test
Before test After test Before test After test
mW
AT
60
50
40
30
20
10
0
80
60
40
PI
CR
DO
CR
N.ON.C
mW
-
10℃〜
+
65℃
80％〜98％
AT
60
50
40
30
20
10
0
80
60
40
PI
CR
DO
CR
N.ON.C
mW
(+125℃-500H) (-40℃-500H)
133
ORT551 l
(6) Shocktest
2)Misoperationarea
(7)Vibrationtest
1500
1000
500
G
AT
Misoperation
area
AT
60
50
40
30
20
10
0
80
60
40
PI
CR
DO
CR
N.O N .C
mW
AT
60
50
40
30
20
10
0
80
60
40
PI
CR
DO
CR
N.O N .C
mW
1002030405060
Pull-in Value • Drop-out ValueContact resistance
Acceleration
Before test
Pull-in Value
After test
Pull-in Value • Drop-out ValueContact resistance
Before test After test
(20G: 10〜1000Hz)
(30G: 11ms)
1) Electrical characteristics
(open→close)
134
nLIFE EXPECTANCY DATA: ORT551
Load conditions
Voltage: 5VDC
Current: 100mA, 1mA, 5mA
Load: Resistive load
Load conditions
Voltage: 12VDC
Current: 5mA, 10mA, 100mA
Load: Resistive load
Load conditions
Voltage: 24VDC
Current: 50mA, 100mA
Load: Resistive load
5
10
1
99.9
90
70
50
30
0.1
5mA , 1mA , 100mA
No failure
Cumulative failure rateCumulative failure rateCumulative failure rate
0235710
523 5710
623 5710
723 5710
8
（%）
* Arrow indicates number of operations where test was completed.
5
10
1
99.9
90
70
50
30
0.1
10mA 5mA
100mA
0235710
5
23 5710
6
23 5710
7
23 5710
8
（%）
l ORT551
Number of operations
Number of operations
Number of operations
5
10
1
99.9
90
70
50
30
0.1
50mA
100mA
0235710
5
23 5710
6
23 5710
7
23 5710
8
（%）