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🔌 Motor Protection Relay Comparison Table

Brand	Model	Voltage Range (Supply / Motor)	Temp Range (°C)	Relay Output	Monitoring Features	Notes
REFCOMP (KRIWAN)	RCX-A2	AC100–250V / AC200–660V	–30 to +60	AC250V 5A	PTC, phase sequence, phase loss, exhaust temp	Used in YORK, Dorin, Frascold, Hanbell
KRIWAN	INT69	AC115–230V / AC200–690V	–30 to +70	AC240V 2.5A	1–9 PTC, AMS, phase monitoring, diagnostics	Multiple variants: INT69 Diagnose, INT69Y
BITZER	SE-B2	AC208–240V / AC200–632V	–30 to +70	AC250V 3A	1–9 PTC, phase sequence, phase failure	Lockout after repeated faults
BOCK	MP10 (06913)	AC230V / AC250V Relay	–30 to +60	AC250V 3A	Motor winding, discharge temp, LED indicators	Semi-hermetic compressors
HANBELL	HB-MP1	AC115–240V / AC200–690V	–30 to +70	AC240V 2.5A	PTC, phase sequence, phase failure, diagnostics	Reset delay logic, UL approved
HANBELL	JTX-A	AC220V / AC200–690V	–20 to +60	AC250V 5A	LED status, phase monitoring	Compact and visual fault indication

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🧠 Key Insights

• KRIWAN INT69 series offers the most flexible diagnostics and sensor compatibility, ideal for advanced monitoring.
• BITZER SE-B2 and BOCK MP10 are tailored for reciprocating and semi-hermetic compressors with robust lockout logic.
• HANBELL HB-MP1 and JTX-A provide cost-effective protection with phase and temperature monitoring, suitable for chillers and screw compressors.
• REFCOMP RCX-A2 is widely adopted across European and Asian compressor brands, offering reliable baseline protection.