Hager MSN325 Miniature Circuit Breaker MCB 25A 3 Pole C Curve 6kA 3 Module DIN Rail 415V

SKU: hagmcb3256k

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$42.00 (ex-GST)

$46.20 (inc-GST)

$46.20

$42.00

(inc-GST)

(ex-GST)

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Hager MSN325 25A three-pole miniature circuit breaker (MCB) with C tripping curve and 6kA breaking capacity. 3-module DIN rail design protects three-phase circuits against overload and short circuit. AS/NZS 60898 compliant.

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Three-phase 25A protection.

The Hager MSN325 is a 25A three-pole miniature circuit breaker (MCB) with a C tripping curve and 6kA breaking capacity, protecting three-phase residential and light commercial circuits against overload and short circuit from a 3-module DIN rail body.

Key Features

Rated current: 25A, three-phase (3P)
C tripping curve (5–10x In)
6kA breaking capacity (Icn) to IEC 60898-1
Rated voltage 415V AC, insulation voltage 500V
3-module width (52.5mm) DIN rail mount
Accepts conductors 1–35mm² rigid, 1–25mm² flexible
Energy limiting class 3; IP20; 360° mounting
Compliant with AS/NZS 60898.1

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Why it Matters

Protects all three phases together.
The MSN325 is a 25A three-pole miniature circuit breaker, protecting a three-phase circuit against both overload and short circuit and tripping automatically when either occurs. Its three linked poles switch and protect all three phases as one, suited to dedicated three-phase loads in homes and light commercial boards – air-conditioning, machinery and higher-draw distribution feeds – with a 6kA breaking capacity for the fault levels found in those switchboards.

C curve for motor and mixed loads.
The C tripping characteristic trips on short circuit at 5 to 10 times rated current, the general-purpose curve suited to mixed resistive and inductive loads including the inrush of three-phase motors. Backed by a 6kA short-circuit breaking capacity to IEC 60898-1 and energy limiting class 3, the MSN325 limits let-through energy during a fault to help protect downstream cabling.

Built for Australian switchboards.
At three modules (52.5mm) wide, 83mm high and 70mm deep, the MSN325 clips onto standard 35mm DIN rail with 360° mounting flexibility, and its terminals take rigid conductors up to 35mm² at 2.8Nm. It is compliant with AS/NZS 60898.1, rated IP20, and operates from -25°C to 70°C to suit distribution boards and homes across Australian conditions. Hager auxiliaries including the MZ201 auxiliary contact, MZ202 alarm contact and MZ203/MZ204 shunt trips are available.

Q: Is the Hager MSN325 a three-phase breaker?
Yes. It is a 3-pole (3P) MCB that switches and protects all three phases of a 415V circuit together; it does not include a separate neutral pole.

Q: What does the C curve mean on the MSN325?
The C curve trips on short circuit at 5 to 10 times the rated current, making it the general-purpose characteristic for mixed resistive and inductive loads including motors.

Q: What is the difference between the MSN325 (6kA) and a 10kA MCB?
6kA is the rated short-circuit breaking capacity, suited to residential and light commercial boards; a 10kA breaker such as Hager's NT range is specified where fault levels are higher, typically in commercial and industrial installations.

(hagmcb3256k)

Electric current
Rated current	25 A
Rated current -15DegC	30,5 A
Rated current -10DegC	29,9 A
Rated current -5DegC	29,3 A
Rated current at 0DegC	28,8 A
Rated current 5DegC	28,2 A
Rated current 10DegC	27,6 A
Rated current 15DegC	26,9 A
Rated current at 20DegC	26,3 A
Rated current 25DegC	25,7 A
Rated current 30DegC	25 A
Rated current 35DegC	24,3 A
Rated current at 40DegC	23,5 A
Rated current at 45DegC	22,7 A
Rated current at 50DegC	21,9 A
Rated current 55DegC	21,1 A
Rated current 60DegC	20,2 A
Rated current 65DegC	19,3 A
Rated current 70DegC	18,3 A
Architecture
Type of pole	3P
Curve	C
Capacity
Number of modules	3
Installation, mounting
Nominal tightening torque top terminal	2,80 - 2,80 Nm
Nominal tightening torque down terminal	2,80 - 2,80 Nm
Nominal tightening torque	2,80 - 2,80 Nm
Type of bottom connection for modular devices	biconnect
Type of top connection for modular devices	Screw terminal
360?ø mounting position possible	Yes
Main electrical attributes
Rated short-circuit breaking capacity Icn AC according to IEC 60898-1	6 kA
Voltage
Rated operational voltage Ue	415 - 415 V
Type voltage supply	AC
Rated insulation voltage Ui	500 V
Rated impulse withstand voltage Uimp	4000 V
Frequency
Frequency	50 - 60 Hz
Connection
Cross-section of input and output with screws, for massive conductors	1 - 35 mm^2
Cross-section of input and output with screws, for flexible conductors	1 - 25 mm^2
Cross-section of input with screws, for flexible conductors	1 - 25 mm^2
Cross-section of input with screws, for massive conductors	1 - 35 mm^2
Cross-section flexible conductor	1 - 25 mm^2
Cross-section rigid conductor	1 - 35 mm^2
Safety
Ingress Protection (IP) class	IP20
Use conditions
Degree of pollution according to IEC 60664 / IEC 60947-2	2
Class of energy limitation I^2t	3
Air humidity protection	For all climates
Operating temperature	-25 - 70 DegC
Power
Total power loss under IN	10,10 W
Connectivity
Type of connection	Screw terminal
Top connection alignment for modular devices	Aligned terminal
Down connection alignment for modular devices	Aligned terminal
Dimensions
Height	83 mm
Width	52,50 mm
Depth	70 mm