Specifications are subject to change without notice (30.08.2002) 1
Rated operational Control Rated operational current
voltage voltage 25 A 40 A 55 A 75 A
400 VACrms 5 VDC RZ3A40LD25 RZ3A40LD40 RZ3A40LD55 RZ3A40LD75
4-32 VDC RZ3A40D25 RZ3A40D40 RZ3A40D55 RZ3A40D75
24-275 VAC/24-50 VDC RZ3A40A25 RZ3A40A40 RZ3A40A55 RZ3A40A75
600 VACrms 5 VDC RZ3A60LD25 RZ3A60LD40 RZ3A60LD55 RZ3A60LD75
4-32 VDC RZ3A60D25 RZ3A60D40 RZ3A60D55 RZ3A60D75
24-275 VAC/24-50 VDC RZ3A60A25 RZ3A60A40 RZ3A60A55 RZ3A60A75
Options
Protection: Over-temperature protection and alarm output: add suffix P to include over-temperature protection and
alarm output. Example: RZ3A60D75P
Switching Rated operational Rated operational Control Option
mode voltage current voltage
A: Zero Switching 40: 400 VACrms 25: 25 AACrms LD: 5 VDC P: Over-
60: 600 VACrms 40: 40 AACrms D: 4-32 VDC temperature
55: 55 AACrms A: 24-275 VAC/24-50 VDC protection and
75: 75 AACrms alarm output
(available only for A and D input)
Selection Guide
Solid State Relay
Number of poles
Switching mode
Rated opertional voltage
Control voltage
Rated opertional current
Options
A Solid State Relay family
designed to switch various
loads such as heating ele-
ments, motors and transform-
ers. The relay is capable of
switching high voltages up to
600 VACrms.
For higher reliability and load
cycle capability three semi-
conductor power units are sol-
dered directly on to the direct
copper bonded (DCB) sub-
strate.
AC- or DC-controlled versions
are available. Built-in LED sta-
tus indication for applied con-
trol voltage and over-tempera-
ture alarm (optional). A version
that can be controlled with 5
VDC @ 15 mA (max) is also
available (LD).
The series covers a range of
load currents up to 75 AACrms.
Solid State Relays
Industrial, 3-Phase ZS
Type RZ3A
• 3-phase Solid State Relay
• Zero switching
• Rated operational current: 3 x 25, 40, 55 or 75 A
• Rated operational voltage: Up to 600 VAC
• Control voltage 5 VDC, 4-32 VDC or 20-275 VAC/DC
• Integral snubber networks
• Over-temperature protection option with alarm output
• IP 10 back-of-hand protection
• LED indication of control input and over-temperature
alarm status
Ordering Key
Product Description
Type Selection
RZ 3 A 60 D 75 P
2Specifications are subject to change without notice (30.08.2002)
RZ3A..25.. RZ3A..40.. RZ3A..55.. RZ3A..75..
Rated operational current
AC51 @ Ta=25°C 25 Arms 40 Arms 55 Arms 75 Arms
AC53a @ Ta=25°C 5 Arms 8 Arms 15 Arms 20 Arms
Minimum operational current 150 mArms 150 mArms 150 mArms 150 mArms
Rep. overload current t=1 s 37 Arms 60 Arms < 125 Arms < 150 Arms
Non-rep. sur ge curr ent
t = 10 ms
230 Ap300 Ap600 Ap1000 Ap
Off-state leakage current < 3 mArms < 3 mArms < 3 mArms < 3 mArms
I2t for fusing t = 10 ms 265 A2s 450 A2s 1800 A2s 6600 A2s
Critical dI/dt @ 50 Hz ≥100 A/µs ≥100 A/µs ≥100 A/µs ≥100 A/µs
On-state voltage drop ≤1.6 Vrms ≤1.6 Vrms ≤1.6 Vrms ≤1.6 Vrms
Critical dV/dt off-state ≥500 V/µs ≥500 V/µs ≥500 V/µs ≥500 V/µs
Rated insulation voltage
Input to output ≥4000 VACrms
Output to case ≥4000 VACrms
Operating temperature - 3 0 °t o + 8 0 ° C ( - 2 2 °t o +158° F)
Storage temperature -40°to +100°C (-40° to + 212° F)
Junction temperature ≤+125°C (+ 257˚F)
Thermal Specifications
Collector - emitter voltage 35 Vdc
Emitter - collector voltage 6 Vdc
Collector current 50 mA
Delay time on reset 20 mS
Alarm Output Specifications
RZ3A40.. RZ3A60..
Operational voltage ranges 24-440 VAC 42-660 VAC
Non-rep. peak voltage 850 Vp1200 Vp
Operational frequency range 45 to 65 Hz 45 to 65 Hz
Overvoltage category III III
Pollution degree 3 2
Approvals* UL, CSA UL, CSA
CE-marking Yes Yes
*Approvals pending
Insulation
General Specifications
RZ3A
Input Specifications
RZ3A..LD.. RZ3A..D.. RZ3A..A..
Control voltage range 5 VDC 4-32 VDC 24-50 VDC/24-275VAC
Pick-up voltage 4.5 VDC 3.8 VDC 18 VAC/20 VDC
Drop-out voltage 1.2 VDC 1.2 VDC 9 VAC
Input current ≤
15 mA ≤23 mA ≤15 mA
Response time pick-up
Power output = 50 Hz 10 ms 10 ms 20 ms
Response time drop-out
Power output = 50 Hz 10 ms 10 ms 30 ms
All data at 25°C
Output Specifications
Specifications are subject to change without notice (30.08.2002) 3
RZ3A
75.0 0.27 0.22 0.17 0.12 0.07 0.02 -- 201
70.0 0.32 0.27 0.21 0.16 0.10 0.05 -- 184
65.0 0.38 0.32 0.26 0.20 0.14 0.08 0.02 167
60.0 0.44 0.38 0.31 0.25 0.18 0.11 0.05 151
55.0 0.52 0.45 0.38 0.30 0.23 0.16 0.08 136
50.0 0.62 0.54 0.45 0.37 0.29 0.21 0.12 121
45.0 0.74 0.64 0.55 0.46 0.36 0.27 0.17 106
40.0 0.87 0.76 0.65 0.54 0.43 0.32 0.22 92
35.0 1.01 0.89 0.76 0.63 0.51 0.38 0.25 79
30.0 1.21 1.06 0.91 0.76 0.60 0.45 0.30 66
25.0 1.49 1.30 1.11 0.93 0.74 0.56 0.37 54
20.0 1.90 1.67 1.43 1.19 0.95 0.71 0.48 42
15.0 2.60 2.28 1.95 1.63 1.30 0.98 0.65 31
10.0 4.01 3.51 3.01 2.51 2.01 1.50 1.00 20
5.0 8.24 7.21 6.18 5.15 4.12 3.09 2.06 10
20 30 40 50 60 70 80
55.0 0.29 0.23 0.17 0.11 0.05 -- -- 164
50.0 0.36 0.29 0.22 0.16 0.09 0.02 -- 148
45.0 0.44 0.36 0.29 0.21 0.14 0.06 -- 133
40.0 0.54 0.46 0.37 0.29 0.20 0.12 0.03 118
35.0 0.67 0.58 0.48 0.38 0.28 0.19 0.09 103
30.0 0.85 0.74 0.62 0.51 0.39 0.28 0.16 87
25.0 1.10 0.96 0.82 0.68 0.55 0.41 0.27 73
20.0 1.38 1.21 1.04 0.87 0.69 0.52 0.35 58
15.0 1.85 1.62 1.39 1.16 0.93 0.70 0.46 43
10.0 2.80 2.45 2.10 1.75 1.40 1.05 0.70 29
5.0 5.62 4.92 4.21 3.51 2.81 2.11 1.40 14
2.5 11.26 9.85 8.45 7.04 5.63 4.22 2.82 7
20 30 40 50 60 70 80
25.0 0.44 0.34 0.23 0.12 0.01 -- -- 92
22.5 0.62 0.49 0.37 0.24 0.12 -- -- 80
20.0 0.84 0.69 0.54 0.40 0.25 0.10 -- 68
17.5 1.12 0.95 0.78 0.60 0.43 0.25 0.08 58
15.0 1.51 1.30 1.09 0.88 0.67 0.46 0.25 47
12.5 2.06 1.80 1.54 1.27 1.01 0.75 0.48 38
10.0 2.75 2.40 2.06 1.72 1.37 1.03 0.69 29
7.5 3.83 3.35 2.87 2.39 1.91 1.43 0.96 21
5.0 6.01 5.26 4.51 3.76 3.01 2.25 1.50 13
2.5 12.62 11.04 9.46 7.89 6.31 4.73 3.15 6
20 30 40 50 60 70 80
Heatsink Dimensions (load current versus ambient temperature)
RZ ..25
Power
dissipation [W]
Load
current [A] Thermal
resistance [K/W]
Ambient temp [°C]
TA
40.0 0.54 0.44 0.34 0.24 0.14 0.04 -- 101
36.0 0.66 0.55 0.44 0.33 0.22 0.11 -- 91
32.0 0.81 0.68 0.56 0.43 0.31 0.18 0.06 80
28.0 1.00 0.86 0.72 0.57 0.43 0.29 0.14 70
24.0 1.26 1.09 0.93 0.76 0.59 0.42 0.25 60
20.0 1.62 1.42 1.21 1.01 0.81 0.61 0.41 49
16.0 2.03 1.78 1.52 1.27 1.02 0.76 0.64 39
12.0 2.72 2.38 2.04 1.70 1.36 1.02 1.03 29
8.0 4.11 3.59 3.08 2.57 2.05 1.54 1.81 19
4.0 8.26 7.22 6.19 5.16 4.13 3.10 4.14 10
20 30 40 50 60 70 80
RZ ..40
Power
dissipation [W]
Load
current [A] Thermal
resistance [K/W]
Ambient temp [°C]
TA
RZ ..55
Power
dissipation [W]
Load
current [A] Thermal
resistance [K/W]
Ambient temp [°C]
TA
RZ ..75
Power
dissipation [W]
Load
current [A] Thermal
resistance [K/W]
Ambient temp [°C]
TA
Carlo Gavazzi Heatsink
(see Accessories)
No heatsink required
RHS 300 Assy or backplate
RHS 112 Assy
RHS 301 Assy
RHS 112 F Assy
RHS 301 F Assy
Consult your distributor
Thermal resistance
Rth s-a > 8.0 K/W
5.0 K/W
1.1 K/W
0.8 K/W
0.4 K/W
0.25 K/W
< 0.25 K/W
Heatsink Selection
4Specifications are subject to change without notice (30.08.2002)
RZ3A
Dimensions
Functional Diagram
Alarm Output Connection
To Over-temperature
Protection circuit
2
1
4
GND
B2 (-)
Output
B1 (+)
RES
PULL UP
Vcc
6
To Over-temperature
Protection circuit
2
1
4
GND
B2 (-) Output
B1 (+)
RES
PULL UP
Vcc
6
Active Low
On Alarm goes Low Active High
On Alarm goes High
Housing Specifications
Weight Approx. 380 g
Material Noryl
Base plate
25, 40, 55A Aluminum, nickel-plated
75A Copper, nickel-plated
Potting compound Polyurethane
Relay
Mounting screws M5
Mounting torque ≤1.5 Nm
Control terminal
Mounting screws M3
Mounting torque ≤0.5 Nm
Wire size Max. 2 x 2.5 mm2
Min. 2 x 1.0 mm2
Power terminal
Mounting screws M5
Mounting torque ≤2.5 Nm
2 x 6 mm2(AWG8)
Wire size Max. 2 x 6 mm2
Min. 2 x 1 mm2
Control
input
AC/DC
Output A
ZC - Zero Crossing ZC - Zero Crossing
Output B
Output C
Output A
Output B
Output C
T1
L1
L2
L3
T2
T3
T1
L1
L2
L3
T2
T3
(A1)
(~)
(+)
(A2)
(~)
(-)
Control
input
AC/DC
(A1)
(~)
(+)
(A2)
(~)
(-)
(B2)
(-)
(B2)
(+)
Alarm
Output
Regulation ZC
ZC
ZC
Regulation
Over temp
circuit
ZC
ZC
ZC
