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Hermetically Sealed Relay
MY4H
Hermetically Sealed Relay Ideal for
Hazardous Locations
• Class 1 Division 2 approved.
• Fully hermetically sealed for hazardous locations.
• Cadmium-free contacts for environment-friendly use.
• Models with bifurcated contact also available.
• Conforms to UL508 and CSA 22.2.
Model Number Structure
■ Model Number Legend
MY- - -
123 45
1. Number of Poles
4: 4 poles
2. Contact
Blank: Single
Z: Bifurcated
3. Enclosure ratings
H: Hermetically sealed
4. Approval
US: Class 1 Division 2 approval
5. Rated voltage
12 VDC, 24 VDC, 24 VAC, 110/120 VAC
Ordering Information
■ List of Models
Type Contact form Plug-in socket/solder terminals
Hermetically sealed 4PDT
4PDT (bifurcated)
MY4H-US
MY4ZH-US
Hermetically Sealed Relay MY4H 1
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Specifications
■ Ratings
Coil
Rated voltage (V) Rated current (mA) Coil resistance
50 Hz 60 Hz
DC 12 75 160 80% max. 10% min. 110% 900 mW
24 36.9 650
AC 110/120 9.9/10.8 8.4/9.2 4,430 30% min. 0.9-1.1 VA
24 53.8 46 180
(
Ω)
Must operate
voltage
Must release
voltage
Max. voltage Power
consumption
(60 Hz)
Contact Ratings
Contact material Ag alloy
Rated load Resistive
Rated carry current 3 A
Max. switching voltage 125 VAC, 125 VDC
Max. switching current 3 A
Max. switching power 330 VA
p.f.=1
Inductive
p.f.=0.4
L/R–7 ms
110 VAC, 3 A
24 VDC, 3 A
110 VAC, 8 A
24 VDC, 1.5 A
72 W
■ Characteristics
Contact resistance 50 mΩ max.
Operate time 20 ms max.
Release time 20 ms max.
Max. operating
frequency
Insulation resistance 100 M
Dielectric strength 1,000 VAC, 1 min between coil and contacts
Vibration resistance Destruction: 10 to 55 to 10 Hz, 0.5 mm single amplitude (1.0 mm double amplitude)
Shock resistance
Endurance Mechanical: Single contact: 50,000,000 operations
Ambient temperature Operating: –25 to 60
Ambient humidity Operating: 5% to 85%
Weight Approx. 50 g
Mechanical: 18,000 operations/hr
Electrical: 1,800 operations/hr (under rated load)
Ω min. (at 500 VDC)
1,000 VAC, 1 min between contacts of different polarity
700 VAC, 1 min between contacts of same polarity
Malfunction: 10 to 55 to 10 Hz, 0.5 mm single amplitude (1.0 mm double amplitude)
Destruction: 1,000 m/s
Malfunction:
When energized: 200 m/s
When not energized: 200 m/s
Bifurcated contact: 5,000,000 operations
Electrical: 100,000 operations. (Single contact)
50,000 operations. (Bifurcated contact)
°C
2
2
2
2 Hermetically Sealed Relay MY4H
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Engineering Data
Maximum Switching Power Endurance
MY4(Z)H MY4H
AC resistive load
Switching current (A)
DC resistive load
DC inductive load
(L/R = 7 ms)
Switching voltage (V)
Dimensions
Solder Terminal Models
MY4(Z)H
AC inductive
load (cosφ=0.4)
Fourteen, 1.2-dia.×3, round holes
4
operations)
110 VAC resistive load
24 VDC resistive load
Endurance (x10
110 VAC inductive
load (cosφ=0.4)
24 VDC inductive load (L/R = 7 ms)
Switching current (A)
Note: The endurance is half for bifurcated contact models.
Terminal Arrangement/
Internal Connections
2.6
22 max.
28.5 max.
(BOTTOM VIEW)
35 max.
6.4
(There is no coil polarity.)
Hermetically Sealed Relay MY4H 3
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Socket
Track-mounted Socket Conforming to
Class 1 Division 2
• Special Socket with Class 1 Division 2 approval.
• Holding clips contribute to safety by preventing the Relay
falling out of the Socket due to vibration.
■ Ordering Information
Item Pole Mode
Track-mounted socket 4 PYF14A-E-US
Note: 1. Class 1 Division 2 approval is obtained for use with the MY4(Z)H Relay.
2. Clips are not included.
■ Dimensions
PYF14A-E-US
Tow, 4.2x5
mounting
72 max.
4
6
29.5 max.
+0.2
−0.1
14-M3x8
31 max.
■ Accessory (Option)
PYC-A1
(2 pcs per set)
36.3
4.5
4.5 1.2
Terminal Arrangement/
Internal Connections
(Top View)
Mounting Holes
Two, M3, M4, or 4.5-dia holes
(TOP VIEW)
Note: Track mounting is also
possible.
ALL DIMENSIONS SHOWN ARE IN MILLIMETERS.
To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527.
Cat. No. J131-E1-02
In the interest of product improvement, specifications are subject to change without notice.
4 Hermetically Sealed Relay MY4H
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