Coaxial 2-way switch (DPDT) 600 kW DC-860 MHz 230 VAC 4 1/2" EIA


RF Switches with outstanding performance

A radio frequency (RF) switch plays a critical role in routing signals between different paths within the RF circuitry. Here’s a detailed breakdown of its function and importance:

  • Signal Routing: RF switches enable the selection of different signal paths within a communication system. This routing function is essential for directing RF signals from one component to another, such as from a transmitter to an antenna or between different antenna elements.
  • Frequency Band Selection: In mobile communication networks, RF switches allow the selection of different frequency bands. This capability is crucial for supporting multiple standards (e.g., GSM, LTE, 5G) and frequency bands in a single device. By switching between different frequency bands, a device can operate across various cellular networks and frequencies
  • Antenna Switching: RF switches are used to switch between multiple antennas. For instance, in MIMO (Multiple Input Multiple Output) systems, RF switches manage the connections to different antennas to optimize signal strength and quality.
  • Transmit/Receive (T/R) Switching: In transceivers, RF switches facilitate the switching between transmit and receive modes. This function is vital for time-division duplex (TDD) systems where the same frequency band is used for both transmitting and receiving but at different times.
  • Redundancy and Fault Tolerance: In broadcasting systems, RF switches provide redundancy by switching to backup components or paths in case of failure. This ensures continuous operation and reliability of the communication system.
  • Signal Testing and Monitoring: RF switches are often used in test and measurement setups to route signals to different test points or instruments without manually reconnecting cables. This allows for efficient and automated testing and monitoring of RF performance.

The Coaxial 2-way switch (DPDT) 600 kW DC-860 MHz 230 VAC 4 1/2" EIA ensures optimal performance for signal transmission between transmitter and antenna in broadcast stations.

Outstanding RF characteristics, best possible passive intermodulation and VSWR

The Coaxial 2-way switch (DPDT) 600 kW DC-860 MHz 230 VAC 4 1/2" EIA enables you to transmit high-frequency signals reliably and flawlessly with optimum protection of your sensitive equipment in a power range up to 600 kW @ 1 MHz (at -10 to +45 °C ambient temperature), 200 kW @ 10 MHz (at -10 to +45 °C ambient temperature), 70 kW @ 100 to 230 MHz (at -10 to +45 °C ambient temperature), 38 kW @ 230 to 860 MHz (at -10 to +45 °C ambient temperature) with maximum passive intermodulation (IM3).

The protection class is IP 40.

Coaxial flange connectors, generally known as “EIA flanges”, are connected by a coupling element. The flange connector system complies with international standards EIA STD RS-225, 339 IEC, DIN EN 122150 and MIL-F 24044. The EIA flange connectors are excellently qualified suited for pressurized systems and for outdoor installations. 4 1/2" EIA connectors are used to link two elements of a rigid or semi-rigid high performance coaxial transmission line for radio frequency signals. Typically, these are operated in systems for very high power transmission (from kW to MW), e.g. in DAB, DVB or FM broadcast systems or in high-energy applications in research facilities (particle accelerator, plasmatron).

Built-in switches use a hypocycloidic gear. This technology makes it possible to combine an extremely compact switch drive and a very short switching time. A sophisticated mechanical design guarantees that the auxiliary contacts (e. g. for a carrier safety loop) are actuated before opening and after closing the RF contacts. Thus, SPINNER switches reliably prevent accidental switching under load ('hot switching').

The drive and switch base (rotor) of a hypocycloid gear mechanism are connected by a special gear mechanism developed by SPINNER. This mechanism varies the torque and angular velocity across the switch’s rotational range. Initially, the torque is very high while the angular velocity of the switch rotor is very low. Then, as the angle increases the angular velocity steadily increases while the torque decreases. After passing the middle of the range, this is reversed and the angular velocity decreases while the torque increases. The drive mechanically locks in both end positions.

Due to the very compact dimensions and the high operational safety, SPINNER switches are preferably used in systems which must have a high level of reliability. The 2+1- and 4+1-switching units developed by Spinner provide an excellent solution to enable redundancy systems for interruption-free operation possible. With only one rack unit as 19" drawer, this compact switching system can maintain the broadcasting operations of remote stations despite the failure of a channel.

The switch offers the following advantages:

  • low insertion loss and high isolation
  • low VSWR over the whole frequency range
  • short switching times and high reliability
  • long service life up to 2 million switching cycles for switches with mechanical drive almost unlimited service life for switches with pin diodes

A motor drive, latching, self-cutoff actuator in a radio frequency (RF) switch operates as follows:

  • Motor Activation: Motorized switches are turned by a special gear mechanism developed by SPINNER. This drive system rotates by 90° and locks in both end positions.
  • Latching Mechanism: Once the switch reaches the intended position, a latching mechanism holds it in place.
  • Self-Cutoff: The motor automatically shuts off after the switch is latched, preventing unnecessary power consumption and avoiding motor overheating.

This setup ensures precise and efficient switching with reliable position maintenance without continuous power.

A Double Pole Double Throw (DPDT) switch is an electrical switch that can control two separate circuits, allowing each to connect to one of two outputs. Essentially, it has two poles (each pole is a separate circuit) and two throws (two different output positions for each pole). This configuration enables the switch to route each input to one of two outputs, providing versatility in circuit control. DPDT switches are commonly used in applications requiring polarity reversal or the ability to switch between two different power sources.

RF characteristics

Number of interfaces:
Interface type:
4 1/2" EIA (50 Ω) per IEC 60339-2
Interface direction:
threaded flanges
Frequency range:
1 to 860 MHz
Average power rating:
600 kW @ 1 MHz (at -10 to +45 °C ambient temperature)
200 kW @ 10 MHz (at -10 to +45 °C ambient temperature)
70 kW @ 100 to 230 MHz (at -10 to +45 °C ambient temperature)
38 kW @ 230 to 860 MHz (at -10 to +45 °C ambient temperature) 1)
Peak voltage:
16 kV 1)
VSWR, max.:
1.04 @ 1 to 230 MHz
1.06 @ 230 to 860 MHz
Insertion loss max.:
0.03 dB
Isolation, min.:
80 dB @ 1 to 230 MHz
70 dB @ 230 to 860 MHz

Electrical characteristics

Switch type:
Switch actuator type:
motor drive, latching, self cutoff
Mains connector designation:
Mains connection:
5 pole SPINNER connector BN 126920, certified according to VDE-Reg. No. B687, DIN EN 61984: 2009-11; EN 61984: 2009 2)
Mains connection system:
L, N, PE, TN-System
Operating voltage:
187 to 253 V AC
Operating AC frequency:
50/60 Hz
Operating current, typ.:
1.5 A 3)
Operating fuses:
2 A (The switch must be externally fused by time-delay)
Control connector designation:
Control connection:
25 pole connector according to DIN 41652 / IEC 807-2 2)
Control voltage rating remark:
SELV circuits according to IEC EN 60950-1
Control current, typ.:
12 mA at control voltage 24 V DC
Control fuses:
The circuit must be externally fused to 0.5 A
Interlock connector designation:
Interlock connection:
25 pole connector according to DIN 41652 / IEC 807-2 2)
Interlock voltage:
≥ 42.4 V ACpk
≥ 60 V DC
Interlock voltage remark:
SELV circuits according to IEC EN 60950-1
Interlock current, max.:
0.5 A
Interlock fuses:
The circuit must be externally limited to 0.5 A
Interlock lead time, typ.:
200 ms (the interlock/signal contacts open 200 ms before and close 200 ms after switching of the RF contacts)
Signaling connector designation:
Signaling connection:
25 pole connector according to DIN 41652 / IEC 807-2 2)
Signaling voltage:
≥ 42.4 V ACpk
≥ 60 V DC
Signaling voltage remark:
SELV circuits according to IEC EN 60950-1
Signaling current, max.:
≥ 0.5 A
Signaling fuses:
The circuit must be externally limited to 0.5 A
Signaling lead time, typ.:
200 ms (the interlock/signal contacts open 200 ms before and close 200 ms after switching of the RF contacts)
Switch command hold time, min.:
1.0 s
Switching frequency, max.:
3 cycles per minute, max. 30 cycles per hour (6 operations per minute, max. 60 operations per hour)

Mechanical characteristics

250,000 cycles
500,000 operations
Degree of protection:
IP 40
Degree of protection remark:
connected with appropriate gasket
Protection class:
I according to IEC EN 61140
Weight, approx.:
26.5 kg

Environmental conditions

Operational conditions:
ETSI EN 300 019-1-3 V2.3.2 (2009-1) class 3.1 N
Operating temperature:
-10 to +60 °C 4)
Relative humidity, max.:
95% (condensation not allowed)
Operating altitude, max.:
4000 m (according to IEC EN 60664-1)
Transport conditions:
ETSI EN 300 019-1-2 V2.1.4 (2003-04) class 2.2
Transport temperature range:
-25 to +70 °C
Transport rain, condensation, icing:
not allowed
Storage conditions:
ETSI EN 300 019-1-1 V2.1.4 (2003-04) class 1.2
Storage ambient temperature:
-10 to +60 °C
Storage rain, condensation, icing:
not allowed

Further remarks

Standard conditions:
• Dielectric: Dry air under standard pressure at sea level (p = 1013 hPa)
• Load VSWR, max. 1.0 (no standing wave)
• No modulation, sinusoidal carrier only
Suitable mating connector included
At room temperature and nominal voltage 230 V AC
Extended temperature range on request
Customs tariff number:



Product data sheet – 941944 – 941944-DS.pdf


Product manual – 941944 – M36192.pdf