MY
Hermetically Sealed Relays: MYH
When your order, specify the rated voltage.
Ordering Information
Relays with Plug-in or Soldered Terminals
Relays with PCB Terminals
Type
4 poles
Type
4 poles
Rated voltage (V)
Classification
Model
MY4H
Rated voltage (V)
Classification
Model
24, 100/110, or 110/120 VAC
12, 24, 48, or 100/110 VDC
24, 100/110, or 110/120 VAC
12, 24, 48, or 100/110 VDC
110/120 VAC
24 VDC
Models with single
contacts
Models with single
contacts
MY4H-0
Bifurcated
contacts
MY4ZH-0
24 or 100/110 VDC
Bifurcated contacts
MY4ZH
Ratings and Specifications
Ratings
Operating Coil
Item Rated current (mA)
Coil inductance (H)
Coil
resistance (Ω)
Must-operate Must-release
Maximum
voltage (V)
Power consumption
(VA, W)
voltage (V)
voltage (V)
Rated voltage (V)
24
50 Hz
53.8
60 Hz
46
Armature OFF Armature ON
180
3,750
4,430
160
0.69
14.54
19.2
0.73
3.2
1.3
Approx. 1.0 to 1.2
(at 60 Hz)
AC
100/110
110/120
12
11.7/12.9
9.9/10.8
10/11
8.4/9.2
24.6
32.1
1.37
5.72
21.0
86.2
30% min.*2
110% of
rated voltage
75
80% max.*1
24
36.9
18.5
650
DC
10% min.*2
Approx. 0.9
48
2,600
11,000
10.6
45.6
100/110
9.1/10
Note: 1. The rated current and coil resistance are measured at a coil temperature of 23°C with tolerances of +15%/−20% for the AC rated current and 15% for the
DC coil resistance.
2. The AC coil resistance and inductance values are reference values only
3. Operating characteristics were measured at a coil temperature of 23°C.
4. The maximum voltage capacity was measured at an ambient temperature of 23°C.
*1. There is variation between products, but actual values are 80% max.
To ensure operation, apply at least 80% of the rated value
*2. There is variation between products, but actual values are 30% minimum for AC and 10% minimum for DC. To ensure release, use a value that is lower than the
specified value.
Contact Ratings
Characteristics
Models with single
1
Contact resistance*
50 mΩ max.
Load
Bifurcated contacts
contacts
2
Operation time*
20 ms max.
Inductive load
cos = 0.4
L/R = 7 ms
Inductive load
Resistive
2
Release time*
20 ms max.
Resistive
load
Item
φ
cos φ = 0.4
L/R = 7 ms
load
Maximum Mechanical
operating
18,000 operations/h
3 A at 110 VAC 0.8 A at 110 VAC 3 A at 110 VAC 0.8 A at 110 VAC
3 A at 24 VDC
Rated load
frequency
1,800 operations/h
Rated load
1.5 A at 24 VDC
3 A at 24 VDC
1.5 A at 24 VDC
4
Insulation resistance*
100 MΩ min.
Rated carry
current
3 A
3 A
Between coil
and contacts
Maximum contact 125 VAC
voltage 125 VDC
125 VAC
125 VDC
Dielectric
strength
1,000 VAC at 50/60 Hz for 1 min.
(700 VAC between contacts of the same polarity.)
Between contacts
of different polarity
Maximum contact
3 A
3 A
current
10 to 55 to 10 Hz, 0.5-mm single amplitude
(1.0-mm double amplitude)
Destruction
Malfunction
Contact structure Single
Bifurcated
Vibration
resistance
Contact materials Au plating + Ag
10 to 55 to 10 Hz, 0.5-mm single amplitude
(1.0-mm double amplitude)
Ambient operating
−25 to 60° C*
temperature
Destruction
Malfunction
1,000 m/s2
200 m/s2
Shock
resistance
Ambient operating
5% to 85%
humidity
50,000,000 operations (5,000,000 operations*4) min.
(operating frequency: 18,000 operations/h)
100,000 operations (50,000 operations*4) min. rated
load, switching frequency: 1,800 operations/h)
Mechanical
Endurance
* With no icing or condensation.
5
Electrical*
Failure rate P value
Single contacts: 100
Bifurcated contacts: 100
µ
A at 1 VDC
6
(reference value)*
µ
A at 100 mVDC
Weight
Approx. 50 g
Note: The above values are initial values.
*1. Measurement conditions: 1 A at 5 VDC using the voltage drop method
*2. Measurement conditions: With rated operating power applied, not including contact
bounce.
Ambient temperature condition: 23° C
*3. Measurement conditions: For 500 VDC applied to the same location as for dielectric
strength measurement.
*4. This value is for bifurcated contacts.
*5. Ambient temperature condition: 23° C
*6. This value was measured at a switching frequency of 120 operations per minute.
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