Specifications are subject to change without notice (18.01.2010) 1
•Hybrid Relay: SSR + EMR combination
•Current rating @ 60˚C: 30 AAC, 40 AAC
•Nominal voltage ratings: 240 VAC, 227 VAC/ 480 VAC +
Neutral
•Control voltage: 24 VAC, 120 VAC, 240 VAC
•Mercury-free, leading to a safer environment
•Similar mounting to mercury relays
•RoHS compliant
•Switching with arc-free operation
•Switching rate: up to 20 cycles per minute
•Operating life: 4 million operating cycles
Product Description Ordering Key
RMD3H combines the benefits
of solid state relays and electro-
mechanical relays to provide a
hybrid relay. This means that
there is virtually no contact arc-
ing and much less heat emis-
sion inside the panel. RMD3H
switches heaters on three legs
while RMD2H has two poles
which are switched and the
third one is directly conneced
between the L2 and the T2 ter-
minals.
This hybrid relay also provides a
solution which does not contain
mercury and is RoHS compli-
ant. The maximum current
reached per pole is 40AAC in a
surrounding temperature of
60˚C (140˚F).
Hybrid Relay
Number of poles
Platform
Rated Voltage
Control voltage
Rated Operational current
Solid State Relays
Zero Switching
Type RMD Hybrid Relay
Rated Voltage Blocking Voltage Number of Rated Rated operational current at 60°C surrounding temperature
switched Poles Control Voltage 30 Arms 40 Arms
240Vrms 600Vp 2 24 VAC/DC RMD2H24LA30 RMD2H24LA40
(1phase loads) 120 VAC RMD2H24MA30 RMD2H24MA40
(3phase delta) 240 VAC RMD2H24HA30 RMD2H24HA40
240Vrms 600Vp 3 24 VAC/ DC RMD3H24LA30 RMD3H24LA40
(3phase delta) 120 VAC RMD3H24MA30 RMD3H24MA40
240 VAC RMD3H24HA30 RMD3H24HA40
480Vrms 600Vp 3 24 VAC/ DC RMD3H48LA30 RMD3H48LA40
(3phase star+Neutral) 120 VAC RMD3H48MA30 RMD3H48MA40
240 VAC RMD3H48HA30 RMD3H48HA40
Selection Guide
RMD 3 H 48 HA 40
General Specifications
RMD..24 RMD..48
Operational voltage Range 240 VAC -15% / +10% 277 VAC (480 VAC with neutral
connection) -15%/+10%
Non-rep peak voltage 600 Vp
Operational frequency range 45 - 65Hz
Power factor > 0.90
CE marking Yes
Finger Protection IP20
Operating life 4 million cycles
Control input status continuously ON Green LED when control input is applied
Varistor protection across outputs 420V
Pollution degree 2 (non-conductive pollution with possibilities of condensation)
Over-voltage category III (fixed installations)
Isolation - input to Output 4000Vrms
RoHS compliance YES
2Specifications are subject to change without notice (18.01.2010)
RMD3H48HA40
Input Specifications
RMD..LA RMD..MA RMD..HA..
Rated Control voltage range 24 VAC/DC +10/-15% 120 VAC +10/-15% 240 VAC +10/-15%
Pick-up voltage 15 VAC/ 9 VDC 36 VAC 90 VAC
Drop-out voltage 15 VAC/ 9 VDC 36 VAC 90 VAC
Maximum Input current 400 mA 400 mA 400 mA
Response time pick-up ZC 0.5 cycle 0.5 cycle 0.5 cycle
Response time drop-out 2 cycles 2 cycles 2 cycles
RMD..30 RMD..40
Rated operational current (see derating curve) 30 AAC 40 AAC
Min. operational current 150 mA 150 mA
Output Specifications
Derating Curves
20
22
24
26
28
30
32
34
36
38
40
42
44
20°C/68°F 30°C/86°F 40°C/104°F 50°C/122°F 60°C/140°F 70°C/158°F
Surrounding Temperature
Current Rating (AAC)
RMD..40 with
AWG6
RMD..30 with AWG8
RMD..40 with AWG8
Specifications are subject to change without notice (18.01.2010) 3
RMD3H48HA40
Connection Specifications
Connection Type Power Connection Screw terminal Control Connection FASTON terminal
Illustration of terminal
Terminal Designations 1L1, 2T1, 3L2, 4T2, 5L3, 6T3, 7N A1, A2
Rigid (Solid or Stranded) 1 x (2.5-16)mm² N/A
1 x (14-6)AWG
Tightening torque 18 in lb (2.1Nm) N/A
Size No. 10 screw 6.35mm (1/4 inch) FASTON
Aperture for termination lug Max 13.5mm for ring and fork/spade termination lugs
Weight approx. 360g
Housing Material PA66
Flame class UL94V0
Dimensions (w x h x d)
(without input connector) 105 x 45 x 90 mm
Housing Specifications
Operating Temperature 0 to 70°C
Storage Temperature 0 to 100°C
Humidity 95% RH, non condensing @ 40°C
Impact resistance 15/11 g/ms
Environmental Specifications
CE marking
Low Voltage Directive IEC / EN 60947-4-3
EMC Immunity IEC / EN 61000-6-3
EMC Emission IEC / EN 61000-6-1
Electrostatic Discharge (ESD)
Immunity IEC / EN 61000-4-2
8kV, PC2 Air discharge
4kV, PC2 Contact
Electrical Fast Transient
Burst Immunity IEC / EN 61000-4-4
Output 2kV, performance criteria 1
Input 1kV, performance criteria 1
Electrical Surge Immunity IEC / EN 61000-4-5
Output, line to line 1kV, performance criteria 1
Output, line to earth 2kV, performance criteria 1
Input, line to line 1kV, performance criteria 2
Intput, line to earth 2kV, performance criteria 2
Radio Interference field IEC / EN 55011
emissions (radiated) Class B (light industry)
Approvals cURus (E80573)
Endurance Test 100,000 cycle as per UL508
Restrictions of hazardous
substances RoHS
Radiated Radio Frequency
Immunity EN 61000-4-3
10 V/m, 80 - 1000 MHz,
1.4 - 2.0 GHz Performance criteria 1
1 V/m, 2.0 - 2.7 GHz Performance criteria 1
Conducted Radio Frequency
Immunity IEC / EN 61000-4-6
10V/m, 0.15 - 80 MHz Performance criteria 1
Voltage Dips Immunity IEC / EN 61000-4-11
0% for 10ms/20ms,
70% for 500ms Performance criteria 2
40% for 200ms Performance criteria 3
Voltage Interruptions Immunity IEC / EN 61000-4-11
0% for 5000ms Performance criteria 3
Radio Interference voltage EC / EN 55011
emissions (conducted) Class A (industrial)
Agency Approvals & EMC
4Specifications are subject to change without notice (18.01.2010)
RMD3H48HA40
Connection Diagrams
L1 L2 L3
T1 T2 T3
N
240 VAC
Line to line voltage:
L1 L2 L3
L1 L2 L3
T1 T2 T3
N
240 VAC
L N
3pole, 2 phase switching - RMD2H24..
240V heaters connected in Delta,
with 240V 3-phase supply.
2pole, 1 phase switching -
RMD2H24..
240V heater with switched Neutral
and Main Supply connection, in a
240V 1-phase system.
RMD2H
RMD3H
Line to line voltage:
Circuit breaker
Overload protection
(may also be semiconductor fuse)
L1 L2 L3
T1 T2 T3
N
240 VAC
L1 L2 L3
L1 L2 L3
T1 T2 T3
N
480 VAC
L1 L2 L3
N
3pole, 3 phase switching - RMD3H24..
240V heaters connected in Delta,
with 240V 3-phase supply.
3pole, 3 phase switching -
RMD3H48..
240V heaters connected in
star(wye) with Neutral connection
supplied by a 480V 3-phase
system.
WARNING: Internal power supply in RMD2H and RMD3H24 is taken through terminals L1-L3, while for RMD3H48 it is taken through L1-N. If these are not
connected correctly, the internal bypass relays will not work. The ‘N’ terminal must be left unconnected for RMD2H and RMD3H24.
Specifications are subject to change without notice (18.01.2010) 5
RMD3H48HA40
Dimensions (mm)
50.7
24.7
14.9
97
97
82.6
82.6
140.7
48.5
6.35
