Thermostat US-603 | ASAHIKEIKI CO.,LTD

US-603　　Snapper、Snap Action
CMJ・UL・C-UL・VDE(EN（６０７３０A）・CQCapproved

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Features: Return manual reset, general-purpose low cost, compact, large capacity (U type), minute current (K type)
Application: Electronic oven, heating unit,water heater, etc.

① Thermostat Specifications
Electrical ratings	U type : 125 VAC, max. 15A, resistance load U type : 250 VAC, max. 10A, resistance load ‐‐　（min. 200mA） K type:30 VDC, max. 1A K type:120 VAC, 125VA (pilot duty) ‐‐　（MIN. DC5V　1mA）
Ⅰ.Temperature setting rangeⅡ.Temperature tolerance	Ⅰ.Temperature setting range ①　50 ～ 100℃ ② 101 ～ 150℃	Ⅱ.Temperature tolerance ①　±4℃ ②　±5℃
Circuit resistance(initial value)	U type:　 50 mΩ or less K type:　 10 mΩ or less
Insulation resistance	100 MΩ or greater [through the 500 VDC megger]
Withstand voltage	U type: 1,500 VAC/minute K type: 1,200 VAC/minute
Thermal resistance	150℃
Cold resistance	-20℃
Opening-closing durability	5,000 times or more [under rated load]

※Please contact specification of the approved models are slightly different from those shown above.

② Model code

US-603	□	□	□	□	□□	–	□	–	□
	1	2	3	4	5		6		7

Contact material

U : Ag・Ag alloy contact
K : Au crossbar contact

Contact model

X : “OFF” for temperature rise

Terminal angle

R : Horizontal terminal
T : Vertical terminal

Terminal model

L : Terminal for positive lock conector 250 series
‐‐　(Brass/size 6.35×0.8, Sn-plated)
M : Terminal for positive lock conector 187 series
‐‐　(Brass/size 4.75×0.5, Sn-plated)
V : IEC730-1 (DIN46244-A4.8-0.8) quasi-terminal
‐‐　(Brass/size 4.8×0.8, Sn-plated)
S : For soldering
‐‐　(Brass/size 4.8×0.5, Ni-plated)

Cover materials
Holder model

QO : Aluminum , no holder
QE : Aluminum , surface type ( free holder ) (23.8mm)
QL : Aluminum , surface type ( free holder ) (24.5mm)
KO : Aluminum , embedded type ( depth 5.0mm 、24.5mm)
AS : Stainless steel , surface type(24mm)
IO : Stainless steel , embedded type ( depth 4.6mm、24.5mm)
JO : Stainless steel , embedded type ( depth 5.2mm 、24.5mm)
QD : Aluminum , surface type ( free holder ) (30mm)
QM : Aluminum , surface type ( for mounting an M3 tapping screw ) 23.8mm)
FO : Stainless steel , no holdersurface type
FF : Stainless steel , surface type(25mm)
SO : Brass , screw-mount type
[M3,M4,M5,6-32UNC,8-32UNC,10-32UNC]

Standard model

H : EN 60730 compliant products (U type)

Free Holer
Fixed model

(QE) FB : Aluminum , surface type ( 23.8mm)
(QL) FB : Aluminum , surface type ( 24.5mm)

③ Sample of Model code

US-603UXRMQO-H　・・・ Horizontal F187 Terminal、Aluminum , no holder
US-603UXTMQE-H　・・・　Vertical F187 Terminal、Aluminum 、surface type ( free holder ) 23.8mm
US-603UXTMQE-H-FB　・・　Vertical F187 Terminal、Aluminum 、surface type ( fixed holder ) 23.8mm
US-603UXRLQL-H　・・・　Horizontal F250 Terminal、Aluminum 、surface type ( free holder ) 24.5mm
US-603UXTMQL-H-FB　・・　Vertical F250 Terminal、Aluminum 、surface type ( fixed holder ) 24.5mm
US-603UXTLKO-H　・・・　Vertical F250 Terminal、Aluminum 、embedded type depth 5mm, 24.5mm
US-603UXRVAS-H　・・・　Horizontal IEC Terminal、Stainless steel 、surface type 24mm
US-603KXTSIO　　・・・　Vertical soldering Terminal、Stainless steel 、embedded type depth 4.6mm,
24.5mm
US-603KXTSQE-FB　・・　Vertical soldering Terminal、Aluminum 、surface type ( fixed holder ) 23.8mm

④ List of international safety standards

Model / Type	Agency	File No.	Operating temp. Ratings	Number of cycles		Max.	Max. Amperes
Model / Type	Agency	File No.	Operating temp. Ratings	Category	cycles	Volts	Resistiveload	Inductiveload	FLA	LRA
US-603U-H	UL C-UL	E52529	160	regulating (MR)	6,000	AC 125	15	–	–	–
						AC 250	10	–	–	–
						AC 120	–	12	–	–
						AC 120	–	–	5.8	34.8
						AC 240	–	–	2.9	17.4
US-603K	UL C-UL	E52529	160	regulating (MR)	6,000	DC 30	1	–	–	–
US-603K	UL C-UL	E52529	160	regulating (MR)	6,000	AC 120	125VA	–	–	–
US-603U-H	VDE	40026555	160	thermal cut-out	6,000 (MR)	AC 250	10	–	–	–
US-603K	VDE	40015226	160	thermal cut-out	6,000 (MR)	DC 30	1	–	–	–
US-603K	VDE	40015226	160	thermal cut-out	6,000 (MR)	AC 120	125VA	–	–	–