Brand: JUMO

JUMO TYA 432 Single-Phase Thyristor Power Switch

Name: JUMO TYA 432 Thyristor Power Switch 709010 | Seven Star LLC
Brand: JUMO
SKU: 709010

Description

Contactless single-phase switching of AC loads with zero-voltage control

The JUMO TYA 432 (type 709010) is a thyristor power switch for contactless switching of alternating current consumers. It is designed for ohmic-inductive loads at a high switching frequency, a typical need in plastic packaging, air conditioning and heat technology, and industrial furnace construction. Because nothing mechanical opens and closes, there are no contacts to wear.

The control and power sections are galvanically isolated by optocouplers with an insulation voltage of 4 kV. The control signal range of DC 4 to 32 V is compatible with the logic outputs of JUMO controllers, and an LED shows the input status. A varistor integrated on the output side protects against voltage peaks from the mains.

The power section works as a zero voltage switch: it switches on at zero voltage and switches off at zero current, regardless of when the control signal changes. This avoids interference voltage and keeps the electromagnetic emissions low.

The power section is rated up to 50 A at 480 V in the larger type, and the housing weighs only about 60 g, so the switch is mounted directly on a heat sink with its base plate. The data sheet lists compliance with the EMC standards DIN EN 61000-6-4 for emission and DIN EN 61000-6-2 for immunity.

Technical specifications

Parameter	Specification
Type	709010, JUMO TYA 432; single-phase circuit type 1
Versions	709010/1-25-240 (25 A, 24 to 265 V) and 709010/1-50-480 (50 A, 42 to 530 V)
Load voltage	24 to 265 Veff (25 A type); 42 to 530 Veff (50 A type)
Load current	25 Aeff or 50 Aeff maximum; minimum 150 mAeff
I2t (t = 10 ms)	520 A2s for the 25 A type; 1800 A2s for the 50 A type
Frequency	45 to 65 Hz
Peak blocking voltage	650 Vs (25 A type); 1400 Vs (50 A type)
Leakage current	3 mA
Control signal	DC 4 to 32 V; switch-on above 2.75 V (25 A) or 3.75 V (50 A); switch-off below 2 V; 10 mA at 32 V
Operating mode	Zero point control; response delay 0.5 x pulse period
Isolation	Optocoupler; insulation voltage 4 kV between control and power section
Thermal resistance	0.8 K/W (25 A type) and 0.5 K/W (50 A type) base plate to environment
Ambient temperature	-20 to +70 °C; storage -40 to +100 °C; 95 % relative humidity, non-condensing
Connection	Screw terminals: load up to 16 mm2, control up to 2.5 mm2
Protection / weight	IP20; Noryl housing; about 60 g; UL approval E223137

Sizing the switch and heat sink

Load current and load voltage cannot be combined freely; the data sheet states that only the stock versions are available, and the part numbers are 00673976 for 709010/1-25-240 and 00673981 for 709010/1-50-480. Pick the version from the supply voltage first, then from the load current with a margin.

A heat sink is required. The data sheet gives reduction tables that show the maximum thermal resistance of the heat sink for a given load current and ambient temperature. For example, a 15 A resistive load at 40 °C control cabinet temperature with the 25 A version needs a heat sink of no more than 3.8 K/W.

Use a silicone-based heat-conducting paste between heat sink and switch. If a silicone-free paste is used, check that it does not attack the plastic housing. For fault-free operation and better availability, the manufacturer recommends a matching semiconductor fuse placed in the load circuit.

The connection is simple: terminals 3/A1+ and 4/A2- take the control signal, while 1/L1 and 2/T1 carry the load. Screw terminals accept up to 16 mm2 on the load side. The control input draws about 10 mA at 32 V and switches on above 2.75 V for the 25 A type or above 3.75 V for the 50 A type, which is worth checking against the voltage your controller output really delivers.

The response delay is half a pulse period, so a controller should pulse the switch with a cycle time suited to the load. Mains frequency must be 45 to 65 Hz, and the minimum load current is 150 mA, which means very small loads may not switch reliably.

Applications

The TYA 432 is typically paired with a temperature controller that has a logic output. The controller pulses the DC control input and the switch passes full mains cycles to the heater, which gives smooth power control without the wear of a contactor.

Typical loads are heating elements in industrial furnaces, heat technology and packaging machines, and inductive loads such as small transformers within the stated power factor. Install it on a heat sink in the control cabinet at an ambient temperature between -20 and +70 °C.

Electrical safety data lists overvoltage category III with pollution degree 3 from outside and 2 inside the housing. Mount the unit vertically with free air flow around the heat sink, keep cabinet temperature within limits, and fuse the load circuit with a semiconductor fuse sized to the I2t value in the table.

Documents and quotation

This page carries the manufacturer PDF (JUMO TYA 432 data sheet 709010 (EN, 4 pages)) for checking dimensions and order codes. Use the quotation form to name the exact variant, options and delivery address, and we will answer with supply information. See also Contactors & Overload Relays for similar instruments.

Datasheets & Documents

Datasheet JUMO TYA 432 data sheet 709010 (EN, 4 pages) Download

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About brand

JUMO is the German maker of temperature sensors, process controllers, pressure transmitters and liquid analysis instruments. Moritz Kurt Juchheim founded it in Fulda in 1948 as M. K. Juchheim KG, making glass thermometers with six employees. The name JUMO comes from the founder's name. It is still a family company headquartered in Fulda, and the parent company has been called JUMO GmbH & Co. KG since 2003.

Seven Star LLC is an independent supplier in Muscat. We list JUMO RTD and thermocouple probes, thermowells, transmitters, controllers, recorders and water analysis instruments, and supply them to process plants, OEMs, HVAC contractors and water utilities in Oman and the GCC by type number.

JUMO company profile

Established	1948, Fulda, Germany, by Moritz Kurt Juchheim
First products	Glass and contact thermometers; platinum glass sensors from 1966
Ownership	Family-owned; renamed JUMO GmbH & Co. KG in 2003
Product families	RTD and thermocouple probes, thermowells, temperature and pressure transmitters, controllers and thermostats, safety temperature limiters, paperless recorders, liquid analysis and flow and level instruments

Milestones

1948: Moritz Kurt Juchheim founds M. K. Juchheim KG in Fulda, making glass thermometers with six employees.
1966: Platinum glass temperature sensors are added.
2003: The parent company is renamed JUMO GmbH & Co. KG.

JUMO products we list

Family	Models	Typical use
RTD and thermocouple probes	902020, 902030, 902050, 902120, 902006 2xPt100, PROCESStemp, mineral-insulated RTD, 901020 thermocouple, 901210, 902810 hygienic, 902550 surface, 902520 HVAC, MarineTemp	Temperature measurement in pipes, vessels, machines, HVAC and food plants
Thermowells and inserts	909710 thermowells, 909740 measuring inserts	Protecting sensors and replacing them without opening the process
Temperature transmitters	dTRANS T01, T03, T04, T05, T06 SIL, T07 HART, T09, T1000 IO-Link, DELOS T switch	Converting sensor signals to 4-20 mA, HART or IO-Link
Pressure and level	dTRANS p20, p30, p31 hygienic, p33 Ex, p02 DELTA, MIDAS S05, MIDAS DP10, DELOS S02, MAERA S25, NESOS R20	Pressure in process, hydraulic and OEM systems; tank and well level
Controllers, limiters and recorders	DICON touch, IMAGO 500, dTRON 316, iTRON, cTRON, diraTRON 104, eTRON T, safetyM STB/STW, safetyM TB/TW, LOGOSCREEN 601, mTRON T	Furnace, oven and process control, over-temperature protection and recording
Liquid analysis and flow	AQUIS touch S, AQUIS touch P, AQUIS 500 pH, AQUIS 500 CR, dTRANS pH 02, pH electrode, digiLine DO, ecoLine NTU, flowTRANS MAG H20, flowTRANS US W01	pH, conductivity, oxygen and turbidity in water treatment; liquid flow

Choosing a temperature sensor starts with the range and accuracy. A Pt100 RTD is accurate and stable from about -200 to 600 °C and is the usual choice in process plants. A thermocouple (type K or J, for example) covers much higher temperatures and responds faster but is less accurate. The wiring also matters: a 3-wire or 4-wire Pt100 connection cancels the resistance of the cable, while a 2-wire connection adds an error that grows with cable length. That is why a head-mounted transmitter is often fitted close to the sensor.

Where JUMO products are used

In Oman and the GCC, JUMO sensors and controllers are used in oil and gas and chemical plants, food and beverage production, plastics and metal heat treatment, HVAC and district cooling, water and wastewater treatment, swimming pools and marine applications.

Ordering JUMO products: what we need

Send the JUMO type number and the full order code from the label (for example 902020/10-...). For probes, add the sensor type (Pt100, Pt1000, type K or J), the number of wires, the insertion length and diameter, and the process connection. For controllers, add the input, outputs and supply voltage.

Facts checked against JUMO's company history, October 2026.

Browse JUMO products by category: Temperature Instrumentation, Pressure Instrumentation, Liquid Analysis Sensors, Controllers & Data Acquisition, Level Transmitter.