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US-628 series

Features: Drip-proof, compact design, general purpose, low cost

Application: Suitable for wide range of applications such as gas and oil appliances, fuel cell, etc.

Introduction

① Thermostat Specifications
Electrical ratings	A type： 125 VAC, max. 10A, resistance load A type： 250 VAC, max. 5A, resistance load ‐‐　（min. 200mA） K type: 24 VDC, max. 1A, resistance load K type: 40 VDC, max. 0.5A, resistance load ‐‐　（MIN. DC5V　1mA）
Ⅰ.Temperature setting range Ⅱ.Temperature tolerance Ⅲ.Differential	Ⅰ.Temperature setting range ①　 0 ～ 50℃ ②　51 ～ 100℃ ③ 101 ～ 130℃	Ⅱ.Temperature tolerance ①　±4℃/±5℃ ②　±4℃/±6℃ ③　±5℃/±7℃	Ⅲ.Differential ①　12K ②　15K ③　20K
Circuit resistance(initial value)	A･K type:　 70 mΩ or less (except for lead wires)
Insulation resistance	100 MΩ or greater [through the 500 VDC megger]
Withstand voltage	A type: 1,500 VAC/minute K type: 1,200 VAC/minute
Thermal resistance	130℃
Cold resistance	-20℃
Opening-closing durability	10,000 times or more [under rated load]

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

② Model code

US-628	□	□	□	□	□□	-	□	□□
	1	2	3	4	5	-	6	7

Contact material

A : Ag ・Ag alloy contact
K : Au cross bar contact

Contact model

X : “OFF” for temperature rise
Y : “ON” for temperature rise

Terminal model

S : Filling-only terminal

O-ring model

S : silicon rubber

Cover materials
Holder model

QO : Aluminum , no holder
QE : Aluminum , surface type ( free holder ) (23.8mm)
QE-FB : Aluminum , surface type ( fixed holder ) (23.8mm)
QL : Aluminum , surface type ( free holder ) (24.5mm)
QL-FB : Aluminum , surface type ( fixed holder ) (24.5mm)
AS : Stainless steel , surface type(24mm)
FO : Stainless steel , no holdersurface type
FF : Stainless steel , surface type(25mm)

Wire material

F : Fluoropolymer wire
V : Heat-proof, lead-free PVC wire

Special specification

③ Sample of Model code

· US-628AXSSQO　・・・　Aluminum cover , no holder

· US-628AXSSQE　・・・　Aluminum cover , surface type ( free holder ) 23.8mm

· US-628AXSSQL　・・・　Aluminum cover , surface type ( free holder ) 24.5mm

· US-628AXSSAS　・・・　Stainless steel cover 、surface type 24mm

④ List of international safety standards

Model / Type	Agency	File No.	Operating temp. Ratings	Number of cycles		Max.	Max. Amperes
				Category	cycles	Volts	Resistive load	Inductive load	FLA	LRA
US-628A	UL C-UL	E52529	150	limiting	30,000	AC 125	10	-	-	-
						AC 250	5	-	-	-
			150			DC 30	5	-	-	-
						DC 40	0.5	-	-	-
US-628K			150	limiting	30,000	DC 30	1	-	-	-
						DC 40	0.5	-	-	-

⑤ Dimensional outline drawing

　◆More detailed image → Click the image

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