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Eastron SDM120CTM vs ABB A41 312-100

Install fit
Phase support Single-phase 1P+N / 1P2W AC system. Single-phase 2-wire; nominal 230 V AC, 57.7-288 V L-N operating range, 50/60 Hz +/-5%.
Installation Indoor one-module 18 mm CT-operated meter for 35 mm DIN rail in a dry enclosure; IP51 and CAT II context; qualified-person installation. Indoor 4-module DIN-rail direct-connected installation by a qualified electrician.
Measurement CT-operated RMS multifunction meter for voltage, current, power, power factor, frequency, demand, and bidirectional energy via pulse and RS485 Modbus RTU. Single-phase direct-connected four-quadrant active/reactive energy and electrical-parameter metering.
Max current 9999 A 80 A
Meter fit
Accuracy class Active Class 1; reactive Class 2; V/I 0.5%; Hz 0.2%; power/PF 1% MID Class B / IEC Class 1 active energy; Class 2 reactive energy
Current sensing External 1 A/5 A CT; 0.25 A minimum, 10 mA start; primary range 1-9999 A. Built-in direct current path, 0.25 A minimum, 5 A base/reference current and 80 A maximum; no external CT.
Monitoring
Protocol RS485 Modbus RTU / pulse output RS-485 Modbus RTU / EQ Bus
Local API Yes Yes
Cloud dependency No vendor cloud required; readings are available locally through RS485 Modbus RTU and pulse outputs. No cloud required; display and RS-485 Modbus RTU / EQ Bus provide local access.
Home Assistant Yes Yes
Solar fit
Solar import/export Yes Yes
Buying context
Price range Unknown EUR 919 gross list price via ABB Netherlands; net price, tax and regional pricing vary.
Availability Global Eastron product range; distributor stock, CT package, certification, and variant availability vary by market. Global ABB channels; Netherlands official listing verified; stock and certification vary by market.
Source check
Last verified Oct 8, 2026 Oct 16, 2026
Product page Official page Official page
Documentation Official docs Official docs
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