Voltage Sensors · Closed Loop · PCB Mount

TMH Series

Name: TMH Series
Brand: ADISENS

Compact closed-loop voltage sensing for accurate AC and DC measurement.

The TMH family uses a closed-loop Hall-effect architecture to convert a primary current proportional to the measured voltage into an isolated secondary current. An external primary series resistor defines the measurement scale, while an external measurement resistor converts the secondary current into a voltage-image output.

< ±0.5%Accuracy at nominal primary current, 25°C

< 0.2% FSLinearity error

< 40 µsResponse time

2.5 kVInsulation voltage

References & Datasheets →Request a Custom TMH

ADISENS TMH closed-loop voltage transducer

Measurement principle

Voltage measurement through an isolated closed-loop current architecture

The voltage to be measured is applied to the primary side through an external series resistor R1. This creates a primary current proportional to the applied voltage. The Hall element and internal compensation amplifier generate a secondary current that reproduces the measured signal while maintaining galvanic isolation between primary and secondary circuits.

1. Primary scalingExternal resistor R1 sets the primary current from the voltage to be measured.

2. Closed-loop sensingThe Hall-effect system and compensation amplifier reproduce the primary information with low drift.

3. Current outputThe sensor provides a secondary current output of up to ±25 mA.

4. Voltage-image outputAn external measurement resistor RM converts the secondary current into the required output voltage.

References & Documents

Validated TMH configurations

Two controlled references are currently published. Each reference opens its complete technical datasheet.

Reference	Rated input	System measuring capability	Primary current range	Turn ratio	Output current	Supply	Accuracy	Response	Isolation	Datasheet
TMH-05P3 PDF ↗	5 V	up to ±1200 V via external series resistor	±7 mA	5000 / 1000	±25 mA	±12 to ±15 V	< ±0.5%	< 40 µs	2.5 kV	Open PDF ↗
TMH-10P3 PDF ↗	10 V	up to ±500 V via external series resistor	±14 mA	2500 / 1000	±25 mA	±12 to ±15 V	< ±0.5%	< 40 µs	2.5 kV	Open PDF ↗

Supporting documentTMH-05P3 / TMH-10P3 — Applications and Reliability

Technical note covering measurement principle, application fit and reliability factors common to both references.

Open Technical Note →

Engineering performance

Shared performance platform across both TMH references

< ±0.5%Accuracy at nominal primary current and 25°C

< 0.2% FSLinearity error

< 40 µsResponse time to 90% of nominal primary current

2.5 kV AC50/60 Hz, 1 minute insulation voltage

−40…+85°COperating temperature

22 gCompact transducer mass

Applications

Where TMH fits best

The TMH technical documentation positions the family for isolated voltage feedback in power electronics and industrial control systems.

AC/DC Variable-Speed DrivesDC-bus and motor-side voltage monitoring for drive control and protection.Power Inverters & Renewable EnergyDC-link voltage measurement in solar, wind and other power-conversion systems.UPSFast voltage feedback for mains-loss detection and inverter-transfer control.SMPSIsolated voltage feedback in high-frequency switching environments.Industrial AutomationCompact isolated voltage sensing in multi-voltage control systems.Control & MonitoringLow-drift voltage-image feedback for electrical and electronic equipment.

Standards & Compliance

Electrical safety and material compliance

The controlled TMH documentation references IEC 60950-1, EN 50178 and SJ 20790. The safety information also states intended-use alignment with IEC 61010-1. CE conformity and RoHS / REACH declarations are available from ADISENS.

IEC 60950-1Electrical-safety reference in the validated documentation

EN 50178Electronic equipment for use in power installations

SJ 20790Referenced in the controlled TMH technical documentation

IEC 61010-1Intended-use and installation safety framework

UL94-V0PBT G30/G15 housing material classification

CEEU conformity information available on request

RoHS / REACHEnvironmental declarations available on request

3-Year WarrantyCommercial warranty subject to ADISENS terms and conditions

Selection support

Need help choosing TMH-05P3 or TMH-10P3?

Share the measured voltage, primary scaling resistor, required output level, supply voltage and application environment with our technical team.

Request Technical Support →

Custom engineering

Need another voltage range or output configuration?

TMH can be reviewed for project-specific rated input voltages and output configurations. Technical feasibility validation is required before release.

Request a Custom TMH →