Product Made in Japan
Manufacturer: DAIHEN
Model: MRN-2500 II

Stud Welding Gun GS-203

Designed based on ergonomics to achieve excellent operational weight balance.
Uses a handle that reduces temperature increase.
Ensures compatibility with previous models (GS-201 and GS-202) for consumables and connector interchangeability.

Adopting a new stud welding gun with improved operability, maintainability, and durability!!
Achieves precise waveform control through digital regulation.

Convenient Features

Equipped with various protection circuits

• Temperature abnormalities, phase abnormalities, overcurrent abnormalities, excessive conduction time, etc.
• Includes protection breakers for gun control cables.

Easy fine-time adjustment

• Enables easy setting of fine welding times below 0.25 seconds by doubling the welding time settings.

Enhanced Safety

Avoids the risk of electric shock caused by no-load voltage

• Cuts off output within 0.3 seconds when idling.

Safety design with protection against dripping water.

Power Equipment Capacity and Connection Cable

Item	MRN-2500 II
Voltage (V)	200
Phase	Three-phase
Equipment Capacity (kVA)	160 (rated 135) or higher
Fuse (A)	300
Input Cable (mm²)	60 (M10)
Work Cable (mm²)	100 or higher
Ground Cable (D-type connection) (mm²)	60 (M10)

Note: Values in parentheses indicate the standard terminal size on the welding machine side.

Specifications

Specifications Table	MRN-2500 II (S-2)
Welding Power Source	MRN-2500 (S-2)
Rated Output Current Range (A)	200–2000 (max. 2500)
Phase	Three-phase
Frequency (Hz)	50/60 (dual use)
Rated Input Voltage (V)	200
Rated Input Capacity (kVA)	238 (max. 291)
Rated Input Current (A)	686 (max. 840)
Rated Output Voltage (V)	266
Rated Duty Cycle (%)	15 (max. duty 10%)
External Protection Rating	Enclosed, fixed type
Welding Time Setting (s)	0.01–0.25
Applicable Welding Studs (mm)	Ø 9.5–Ø 25
External Dimensions (mm)	680 × 1055 × 970 (with eyebolts)
Weight (kg)	470
Stud Welding Gun Specifications	Details
Model	GS-203
Rated (Max) Welding Current (A)	2000 (2500)
Rated Duty Cycle (%)	5 (max. duty 3%)
Damping Mechanism	Yes
Applicable Stud Diameter (mm)	Ø 9.5–Ø 25
Dimensions (mm)	230 × 375
Weight (kg)	2.4

Standard Components

Category	MRN-2500 II (S-2)
Welding Power Source	MRN-2500
Work Cable	100 mm² × 5 m × 1 piece
Gun Connection Cable	100 mm² × 0.5 m × 1 piece
Stud Welding Gun	GS-203
Leg	For stud lengths of 270 mm or less, 1 set

Note: Stud chucks and foots are sold separately.

Optional Accessories

Product Name	Model	Specification	Length
Extension Power Cable	BKPJX-1005	100 mm²	5 m
	BKPJX-1010		10 m
	BKPJX-1015		15 m
	BKPJX-1020		20 m
Extension Control Cable	BKCPJ-0405	4-core	5 m
	BKCPJ-0410		10 m
	BKCPJ-0415		15 m
	BKCPJ-0420		20 m
Remote Control	K3998V00	–	4 m
Extension Remote Control Cable	BKCPJ-0605	6-core	10 m
	BKCPJ-0615		15 m
	BKCPJ-0620		20 m

Note: Part numbers are included.