Brand: JUMO

JUMO TYA HL301 Single-Phase Thyristor Controller, Type 709081

Name: JUMO TYA HL301 Thyristor Controller 709081 | Seven Star LLC
Brand: JUMO
SKU: 709081

Description

A high-current single-phase controller with phase angle and burst firing

The JUMO TYA HL301 (type 709081) is a microprocessor-controlled single-phase thyristor power controller for precise control of resistive and resistive-inductive loads, including transformers. It can be used in star, delta and open-delta connections, where three units form an open-delta arrangement. Unlike simpler burst-firing units, it supports both phase angle control and pulse group operation, which makes it suitable for transformer loads and for infrared emitters with fast half-wave control. Control modes include U, U squared, I, I squared and P control, which stabilise the output when mains voltage or load resistance changes. The datasheet lists current ratings from 300 A to 800 A at 480 to 600 V and from 120 A to 800 A at 690 V, with an integrated semiconductor fuse, optional fieldbus protocols and a USB setup wizard.

Technical specifications

Parameter	Specification
Type	709081 TYA HL301, single-phase thyristor power controller
Rated current 480/600 V	300, 400, 500, 600, 700 and 800 A; voltage range 24 to 600 V
Rated current 690 V	120, 150, 180, 210, 400, 500, 600, 700 and 800 A; voltage range 24 to 690 V
Operating voltage	480 V, 600 V or 690 V, each +10 %/-10 %; frequency 47 to 70 Hz
Firing types	Zero crossing, single cycle, burst firing, soft start with burst, phase angle, soft start with phase angle, delayed ignition, half cycle
Control modes	U, U squared, I, I squared, P (U x I), open loop, external 0 to 10 V, 4 to 20 mA or 0 to 20 mA
Analog inputs	0 to 10 V (15 kΩ); 0/4 to 20 mA (100 Ω); potentiometer 10 kΩ minimum
Logic input	SSR input 4 to 30 V DC, 5 mA; duty cycle min. 100 ms, max. 3 Hz
Digital input	4 to 30 V DC, 5 mA maximum, 0.5 Hz maximum
Outputs	Actual-value output 0 to 10 V or 4 to 20 mA; alarm relay changeover contact
Fieldbus options	PROFINET I/O, PROFIBUS, EtherCAT, EtherNet/IP, Modbus RTU and TCP
Extra functions	Partial load break monitoring, current limitation, energy meter, process data recording, load management
Fan	230 V standard, 115 V or 24 V DC option; 16 W per fan at 230 V, one or two fans by size
Electronics supply	Maximum 8 to 10 VA; auxiliary voltage range set by transformer jumpers, from 100 V to 690 V line voltage
Measuring accuracy	Load voltage ±2 %, current ±2 %, power ±5 %, analog input ±0.5 % of full scale
Ambient temperature	0 to 40 °C at rated current, up to 50 °C with derating; storage -25 to +70 °C; altitude derating 2 % per 100 m above 1000 m
Dimensions and weight	137 x 440 x 270 mm and 10.5 kg (120 to 210 A); 137 x 520 x 270 mm and 15 kg (300 to 700 A); 137 x 560 x 270 mm and 17.2 kg (800 A)
Protection	IP20; housing polymeric; heat sink alarm at 80 °C factory setting; cooling by forced convection
Approvals	cUL listed to UL 508 and CSA C22.2 No. 14 up to 700 A and 600 V; EN 60947-4-3 class A emissions

Control modes and current ratings

Phase angle control gives smooth power regulation of infrared emitters and transformers, and the alpha-start function limits inrush into transformer primaries. Burst firing keeps harmonics low on resistive heaters, while the soft start with pulse groups reduces inrush. Selecting the feedback mode matters: voltage or power control compensates for mains swings, and current control holds output as a heater ages and its resistance changes. Power loss at rated current grows from about 443 W at 300 A to 1144 W at 800 A, which sets the cabinet ventilation need, and each size lists a suggested semiconductor fuse and its I-squared-t value.

The unit displays all relevant parameters on an LED display with an information line and keys, and a commissioning wizard guides the setup over USB. Top-bottom wiring helps with panel layout. Integrated diagnostics include rotating field detection, and a Fast Enable input forces phase angle triggering. UL 508 approval covers models up to 700 A and 600 V, with a separate UL approval note for the 800 A model.

Installation notes for harsh sites

The datasheet says not to install in direct sunlight, conductive dust, corrosive gas, vibration, water or salty atmospheres. For coastal plants in the Gulf that means a filtered, air-conditioned panel with clean cooling air. The controller must be mounted vertically with its fan, connected with power busbars using M10 screws from 300 A and M8 up to 120 A. At a cabinet temperature above 50 °C the datasheet asks to contact the manufacturer, and operation above 40 °C is not covered by UL. Pollution degree 2 applies. Typical duties are large electric heaters, glass and ceramic furnaces, and transformer-fed loads.

See the power modules category for related items.

Using the TYA HL301 in Oman and the GCC

High-current single-phase thyristor controllers are used in the region on heat treatment furnaces, glass and ceramic kilns, infrared drying lines, transformer-fed heaters and process heaters in chemical and plastics plants. Phase angle control is needed for transformer primary loads and for heaters with strongly temperature-dependent resistance, while burst firing is preferred for simple resistive loads.

Heat loss from the thyristors is the main design issue in hot climates. The panel cooling must remove this heat, and the derating curves in the operating manual must be applied when the ambient temperature is high. Keep heat sinks clean, use the specified semiconductor fuses, and check tightness of the power terminals during maintenance.

Before ordering, compare the controller rating with the real load current, including inrush current for transformer loads and the higher current of some heating elements when cold, and leave a margin. Where several units share one panel, the total heat loss of all of them must be considered together when sizing the cooling.

Information to send with an enquiry

Load type, power, voltage and current
Control mode and control signal
Star, delta or open-delta arrangement
Ambient temperature and cooling of the panel
Quantity

Documents and quotation

The hosted document is JUMO data sheet 709081 (12 pages, English). It includes fan data, fuse suggestions and dimensions. Confirm rated current, voltage, auxiliary supply, fieldbus and approvals before ordering. Seven Star LLC is an independent supplier in Muscat; send the load data and control signal for a quotation.

Datasheets & Documents

Datasheet JUMO 709081 data sheet 709081 (EN) 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.

FAQ

Questions about the JUMO TYA HL301 Single-Phase Thyristor Controller,

Answers from our engineering team on installation, compatibility and integration.

01What current ratings does the TYA HL301 cover?

300 to 800 A at 480 to 600 V and 120 to 800 A at 690 V.

02Which firing modes does it support?

Phase angle control, burst firing, soft start and half-cycle operation, among others.

03Can it control transformer loads?

Yes, phase angle and alpha-start functions are intended for transformer loads and infrared emitters.

04Which fieldbus options exist?

PROFINET I/O, PROFIBUS, EtherCAT, EtherNet/IP and Modbus RTU or TCP.

05What installation limits apply?

No direct sunlight, conductive dust, corrosive gas, vibration, water or salty environments, and pollution degree 2.