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Eastron SDM120CTM vs ABB B23 112-100

Install fit
Phase support Single-phase 1P+N / 1P2W AC system. Three-phase 3-wire and 4-wire systems; nominal 3 x 230/400 V AC.
Installation Indoor 1-module DIN-rail CT-operated single-phase meter with external CT wiring. Indoor 4-DIN DIN-rail direct-connected three-phase energy meter for distribution boards and small enclosures.
Measurement CT-operated single-phase multifunction energy meter with bidirectional energy and RS485 Modbus RTU. Direct-connected three-phase active-energy meter with RS485 Modbus RTU / EQ Bus and pulse or alarm output.
Max current 9999 A 65 A
Meter fit
Accuracy class Active energy Class 1.0 / Class B; reactive energy Class 2. Active energy Class B (Class 1).
Current sensing External CTs; CT primary 1-9999 A with 1 A or 5 A CT secondary input. Direct connection up to 65 A; no external CTs for B23 112-100.
Monitoring
Protocol RS485 Modbus RTU / pulse output Modbus RTU
Local API Yes Yes
Cloud dependency No vendor cloud required; readings are available locally through RS485 Modbus RTU and pulse outputs. No ABB cloud required for core metering; B23 112-100 exposes local RS485 Modbus RTU / EQ Bus data when connected to compatible equipment.
Home Assistant Yes Yes
Solar fit
Solar import/export Yes No
Buying context
Price range Unknown About $150-$300
Availability Global Eastron product range; distributor stock, CT package, certification, and variant availability vary by market. ABB global product and distributor channels; MID/IEC availability and local stock vary by country.
Source check
Last verified Jun 28, 2026 Jun 25, 2026
Product page Official page Official page
Documentation Official docs Official docs
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