CLIFF Electronic Components - Thermal Circuit Protection Devices

Circuit Protection Devices - One Shot Thermal Cutouts

Cliff™ thermal cutouts are available with axial and radial leads. They are widely used to prevent overheating of electrical components like motors, transformers and solenoids. They are particularly used to keep the electronic circuits from over heating in equipment such as computers, VTRs, inverters, switching power supplies and medical equipment.

Structure

Tin / Lead plated soft copper wire leads are welded to a fusible alloy with a specific melting point. Special resins coat the alloy in order to prevent surface oxidation and to ensure complete cutoff function at melting point. The fusible alloy is completely insulated within the case by sealing the leads and the case with a special resin compound.

Working Theory

When the ambient temperature of the thermal cutout rises, the fusible alloy melts. The electrical circuit in the thermal cutout is opened. Two separate spheres form at the edges of the leads through surface tension of the melting fusible alloy. Additional insulation between the spheres is provided by the coating resin which encapsulates the surface.

Features

Available in two types - axial and radial.

Highly reliable due to their outstanding thermal sensitivity.

Cliff™ thermal cutouts are approved by various international standards including JEAML (DENAN), UL, CSA, VDE and BEAB.

Japan Electrical Appliance and Material Safety Law (DENAN) from the Japanese Ministry of Economy, Trade and Industry (METI)

See the PDF datasheet for more technical details: Thermal Cutouts 1 A to 7 A

Definitions of the characteristics

Nominal Functioning Temperature or Nominal Operating Temperature under the JEAML. Under such standards as UL, CSA and VDE which basically comply with the IEC specifications, it is called Rated Functioning Temperature. According to the JEAML, thermal cutouts, when conducting the detection current and subject to the increasing rate of temperature designated by the specifications, must function in the tolerance range of ±7°C to the rated functioning temperature. With the IEC specifications, they must function in the range of +0°C~-10°C to the rated functioning temperature.
Operating Temperature of a thermal cutout carrying current less than 0.1A, and placed in an oil bath where the temperature rises 1°C per minute.
Holding Temperature is the maximum temperature at which a thermal cutout can be maintained without operating while conducting the rated current for a period of time specified by the manufacturer.
Maximum Temperature Limit is the maximum temperature at which mechanical and electrical properties of a thermal cutout can be maintained without resuming conductivity after operating.
Approved=√. Pending=°.

H type

Rated 2 A, 250 VAC. Simple plug-in holder for mounting H type thermal cutouts. No insulation tube is required, (labour labor saving in the transformer line). Material is PBT. Available only while stocks last.

Model	Nominal Operating Temp. °C	Operating Temp. °C	Holding Temp. °C	Maximum Temp. °C	Current (A)	Volt (V)	JEAML	UL E73591	CSA LR60621	VDE 13710-1171-0007	BEAB C0532
H 076	76	73 ±2.5	50	85	2	250	33-793	√	√	°	°
H 086	86	81 ±2	60	95	2	250	33-792	√	√	°	√
H 100	103	98 ±2	70	180	2	250	33-696	√	√	√	√
H 110	117	112 ±2	85	180	2	250	33-696	√	√	√	√
H 125	127	124 ±2	95	180	2	250	33-411	√	√	√	√
H 130	136	130 ±2	105	180	2	250	33-411	√	√	√	√
H 135	140	135 ±2	105	180	2	250	33-411	√	√	√	√
H 145	150	145 ±2	115	180	2	250	33-412	√	√	√	√
H 169	169	165 ±2	130	180	2	250	33-706	√	√	√	√

H-A type

H-A type thermal cutout Rated 2 A, 250 VAC.

Model	Nominal Operating Temp. °C	Operating Temp. °C	Holding Temp. °C	Maximum Temp. °C	Current (A)	Volt (V)	JEAML	UL E73591	CSA LR60621	VDE 13710-1171-0007	BEAB C0532
H 100A	103	98 ±2	70	180	2	250	33-696	√	√	√	√
H 110A	117	112 ±2	85	180	2	250	33-696	√	√	√	√
H 125A	127	124 ±2	95	180	2	250	33-411	√	√	√	√
H 130A	136	130 ±2	105	180	2	250	33-411	√	√	√	√
H 135A	140	135 ±2	105	180	2	250	33-411	√	√	√	√
H 145A	150	145 ±2	115	180	2	250	33-412	√	√	√	√

E type

E type thermal cutout Rated 3 A, 250 VAC and 5 A, 125 VAC.

Model	Nominal Operating Temp. °C	Operating Temp. °C	Holding Temp. °C	Maximum Temp. °C	Current (A)	Volt (V)	JEAML	UL E73591	CSA LR60621	VDE 13710-4510-1010/0010	BEAB 0790
E 0	76	73 ±2.5	50	85	3	250	33-793	°	°	°	°
E 1	86	81 ±2	60	95	3	250	33-792	°	°	°	°
E 2	103	98 ±2	70	180	3	250	33-696	√	√	√	√
E 3	117	112 ±2	85	180	3	250	33-696	√	√	√	√
E 3	117	112 ±2	85	180	5	125	-	√	√	-	-
E 4	127	124 ±2	95	180	3	250	33-411	√	√	√	√
E 4	127	124 ±2	95	180	5	125	-	√	√	-	-
E 5	136	130 ±2	105	180	3	250	33-411	√	√	√	√
E 5	136	130 ±2	105	180	5	125	-	√	√	-	-
E 7	150	145 ±2	115	180	3	250	33-412	√	√	√	√
E 7	150	145 ±2	115	180	5	125	-	√	√	-	-
E 8	169	165 ±2	130	180	3	250	33-706	√	√	√	√
E 8	169	165 ±2	130	180	5	125	-	-	-	-	-

K type

K type thermal cutout Rated 1 A, 250 VAC and 3 A, 50 VAC (except K10).

Model	Nominal Operating Temp. °C	Operating Temp. °C	Holding Temp. °C	Maximum Temp. °C	Current (A)	Volt (V)	JEAML	UL	CSA LR60621	VDE	BEAB C0849
K 10	102	98 ±2	70	160	0.5	250	33-696	°	√	°	√
K 10	102	98 ±2	70	160	2.5	DC50V	-	°	√	°	√
K 11	115	112 ±2	95	160	1.0	250	33-696	°	√	°	°
K 11	115	112 ±2	95	160	3.0	DC50V	-	°	√	°	°
K 12	130	126 ±2	100	160	1.0	250	33-411	°	√	°	°
K 12	130	126 ±2	100	160	3.0	DC50V	-	°	√	°	°
K 13	133	130 ±2	100	160	1.0	250	33-411	°	√	°	√
K 13	133	130 ±2	100	160	3.0	DC50V	-	°	√	°	°
K 14	150	145 ±2	120	160	0.5	250	33-412	°	√	°	√
K 14	150	145 ±2	120	160	3.0	DC50V	-	°	√	°	√
K 16	169	165 ±3	130	180	1.0	250	33-706	-	-	-	-
K 16	169	165 ±3	130	180	3.0	DC50V	-	-	-	-	-
K 18	187	183 ±3	160	260	1.0	250	33-844	-	-	-	-
K 18	187	183 ±3	160	260	3.0	DC50V	-	-	-	-	-

V type

V type thermal cutout Rated 2 A, 250 VAC.

Model	Nominal Operating Temp. °C	Operating Temp. °C	Holding Temp. °C	Maximum Temp. °C	Current (A)	Volt (V)	JEAML	UL E73591	CSA LR60621	VDE 13710-4510-0006/1008	BEAB 0807
V 076	76	73 ±2.5	50	85	2	250	33-793	√	√	√	√
V 086	86	81 ±2	60	95	2	250	33-792	√	√	√	√
V 100	103	98 ±2	70	160	2	250	33-696	√	√	√	√
V 110	117	112 ±2	95	160	2	250	33-696	√	√	√	√
V 125	131	126 ±2	95	160	2	250	33-411	√	√	√	°
V 130	135	131 ±2	100	160	2	250	33-411	√	√	√	°
V 145	150	145 ±2	115	160	2	250	33-412	√	√	√	√
V 169	169	165 ±2	130	180	2	250	33-706	°	√	√	√
V 187	187	183 ±2	160	200	2	250	33-844	°	√	√	√

VS type

VS type thermal cutout Rated 1 A, 250 VAC and 3 A, 50 VDC.

Model	Nominal Operating Temp. °C	Operating Temp. °C	Holding Temp. °C	Maximum Temp. °C	Current (A)	Volt (V)	JEAML	UL E73591	CSA LR60621	VDE 13710-1171-0002	BEAB 0569
VS 07	76	73 ±2.5	50	85	1.0	250	33-793	√	√	°	√
VS 08	86	81 ±2	60	95	1.0	250	33-792	√	√	°	√
VS 08	86	81 ±2	60	95	2.5	DC50V	-	√	√	°	°
VS 10	103	98 ±2	70	160	1.0	250	33-696	√	√	√	√
VS 10	103	98 ±2	70	160	3.0	DC50V	-	√	√	°	√
VS 11	117	112 ±2	95	160	1.0	250	33-696	√	√	√	√
VS 11	117	112 ±2	95	160	3.0	DC50V	-	√	√	°	√
VS 12	128	124 ±2	100	160	1.0	250	33-411	√	√	√	√
VS 12	128	124 ±2	100	160	3.0	DC50V	-	√	√	°	°
VS 13	136	131 ±2	100	160	1.0	250	33-411	√	√	√	√
VS 13	136	131 ±2	100	160	3.0	DC50V	-	√	√	°	°
VS 14	150	145 ±2	115	160	1.0	250	33-412	√	√	√	√
VS 14	150	145 ±2	115	160	3.0	DC50V	-	√	√	°	√
VS 16	169	165 ±2	130	180	1.0	250	33-706	√	√	-	√
VS 16	169	165 ±2	130	180	3.0	DC50V	-	-	-	-	-
VS 18	187	183 ±2	160	200	1.0	250	33-844	-	-	-	-
VS 18	187	183 ±2	160	200	3.0	DC50V	-	-	-	-	-

Y type

Y type thermal cutout Rated 3 A, 250 VAC and 5 A, 50 VDC.

Model	Nominal Operating Temp. °C	Operating Temp. °C	Holding Temp. °C	Maximum Temp. °C	Current (A)	Volt (V)	JEAML	UL	CSA LR60621	VDE 13710-4510-0011	BEAB 0791
Y 2	103	98 ±2	70	180	3	250	33-696	°	√	√	√
Y 2	103	98 ±2	70	180	4	125	-	-	-	-	-
Y 3	117	112 ±2	95	180	3	250	33-696	°	√	√	√
Y 3	117	112 ±2	95	180	5	125	-	°	√	-	-
Y 4	128	124 ±2	100	180	3	250	33-411	°	√	√	√
Y 4	128	124 ±2	100	180	5	125	-	°	√	-	-
Y 5	136	131 ±2	100	180	3	250	33-411	°	√	√	√
Y 5	136	131 ±2	100	180	5	125	-	°	√	-	-
Y 7	150	145 ±2	115	180	3	250	33-412	°	√	√	√
Y 7	150	145 ±2	115	180	5	125	-	°	√	-	-
Y 8	169	165 ±3	130	180	3	250	33-706	°	√	√	√
Y 8	169	165 ±3	130	180	5	125	-	-	-	-	-
Y 9	187	183 ±3	160	200	3	250	33-844	-	-	-	-
Y 9	187	183 ±3	160	200	5	125	-	-	-	-	-

L type

L type thermal cutout Rated 5 A, 250 VAC and 7 A, 50 VDC.

Model	Nominal Operating Temp. °C	Operating Temp. °C	Holding Temp. °C	Maximum Temp. °C	Current (A)	Volt (V)	JEAML	UL	CSA LR60621	VDE	BEAB
L 2	102	98 ±2	70	160	5	250	33-696	°	√	°	°
L 2	102	98 ±2	70	160	7	125	-	°	√	-	-
L 3	115	112 ±2	95	160	5	250	33-696	°	√	°	°
L 3	115	112 ±2	95	160	7	125	-	°	√	-	-
L 4	130	126 ±2	100	160	5	250	33-411	°	√	°	°
L 4	130	126 ±2	100	160	7	125	-	°	√	-	-
L 5	133	130 ±2	100	160	5	250	33-411	°	√	°	°
L 5	133	130 ±2	100	160	7	125	-	°	√	-	-
L 7	150	145 ±2	120	160	5	250	33-412	°	√	°	°
L 7	150	145 ±2	120	160	7	125	-	°	√	-	-
L 8	169	165 ±3	130	180	5	250	33-706	°	°	°	°
L 8	169	165 ±3	130	180	7	125	-	°	°	-	-
L 9	187	183 ±3	130	200	5	250	33-844	-	-	-	-
L 9	187	183 ±3	130	200	7	125	-	-	-	-	-

P type

P type thermal cutout Rated 2 A, 250 VAC and 3.5 A, 50 VDC.

Model	Nominal Operating Temp. °C	Operating Temp. °C	Holding Temp. °C	Maximum Temp. °C	Current (A)	Volt (V)	JEAML	UL E73591	CSA LR60621	VDE 13710-1171-0002	BEAB 0569
P 07	76	73 ±2.5	50	85	1	250	33-793	°	°	°	°
P 08	86	81 ±2	65	95	1	250	33-792	°	°	°	°
P 10	103	98 ±2	70	160	1	250	33-696	√	√	√	√
P 10	103	98 ±2	70	160	2.5	DC50	-	√	√	°	°
P 11	117	112 ±2	95	160	1	250	33-696	√	√	√	√
P 11	117	112 ±2	95	160	2.5	DC50	-	√	√	°	°
P 12	128	124 ±2	100	160	1	250	33-411	√	√	√	√
P 12	128	124 ±2	100	160	3	DC50	-	√	√	°	°
P 13	136	131 ±2	100	160	1	250	33-411	√	√	√	√
P 13	136	131 ±2	100	160	3	DC50	-	√	√	°	°
P 14	150	145 ±2	115	160	1	250	33-412	√	√	√	√
P 14	150	145 ±2	115	160	3	DC50	-	√	√	°	√

N type

N type thermal cutout Rated 1 A, 250 VAC and 3 A, 50 VDC.

Model	Nominal Operating Temp. °C	Operating Temp. °C	Holding Temp. °C	Maximum Temp. °C	Current (A)	Volt (V)	JEAML	UL E73591	CSA LR60621	VDE 13710-4510-1009/0009	BEAB 0617
N 0	76	73 ±2.5	50	85	1.0	250	33-793	°	√	°	√
N 0	76	73 ±2.5	50	85	2.5	DC50	-	√	√	°	√
N 1	86	81 ±2	60	95	1.0	250	33-792	√	√	°	√
N 1	86	81 ±2	60	95	2.5	DC50	-	√	√	°	√
N 2	103	98 ±2	70	180	1.0	250	33-696	√	√	√	√
N 2	103	98 ±2	70	180	3.0	DC50	-	√	√	°	√
N 3	117	112 ±2	85	180	1.0	250	33-696	√	√	√	√
N 3	117	112 ±2	85	180	3.0	DC50	-	√	√	°	√
N 4	127	124 ±2	95	180	1.0	250	33-411	√	√	√	√
N 4	127	124 ±2	95	180	3.0	DC50	-	√	√	°	√
N 5	136	130 ±2	105	180	1.0	250	33-411	√	√	√	√
N 5	136	130 ±2	105	180	3.0	DC50	-	√	√	°	√
N 6	140	135 ±2	105	180	1.0	250	33-411	√	√	√	√
N 6	140	135 ±2	105	180	3.0	DC50	-	√	√	°	√
N 7	150	145 ±2	115	180	1.0	250	33-412	√	√	√	√
N 7	150	145 ±2	115	180	3.0	DC50	-	√	√	°	√
N 8	169	165 ±3	130	180	1.0	250	33-706	√	√	√	√
N 8	169	165 ±3	130	180	3.0	DC50	-	-	-	-	-

EP type

EP type thermal cutout Rated 3 A, 250 VAC and 4 A, 50 VDC.

Model	Nominal Operating Temp. °C	Operating Temp. °C	Holding Temp. °C	Maximum Temp. °C	Current (A)	Volt (V)	JEAML	UL E73591	CSA	VDE	BEAB
EP 0	76	73 ±2.5	50	85	3.0	250	33-793	°	°	°	°
EP 1	86	81 ±2	60	95	3.0	250	33-792	°	°	°	°
EP 2	103	98 ±2	70	180	3.0	250	33-696	√	°	°	°
EP 2	103	98 ±2	70	180	3.5	125	-	-	-	-	-
EP 3	117	112 ±2	85	180	3.0	250	33-696	√	°	°	°
EP 3	117	112 ±2	85	180	4.0	125	-	√	°	-	-
EP 4	127	124 ±2	95	180	3.0	250	33-411	√	°	°	°
EP 4	127	124 ±2	95	180	4.0	125	-	√	°	-	-
EP 5	136	130 ±2	105	180	3.0	250	33-411	√	°	°	°
EP 5	136	130 ±2	105	180	4.0	125	-	√	°	-	-
EP 7	150	145 ±2	115	180	3.0	250	33-412	√	°	°	°
EP 7	150	145 ±2	115	180	4.0	125	-	√	°	-	-

Circuit Protection Devices

Please contact Cliff™ sales for more information.

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CLIFF™ Electronic Components Inc.

Circuit Protection Devices - One Shot Thermal Cutouts

H type

H-A type

E type

K type

V type

VS type

Y type

L type

P type

N type

EP type

Introduction

Applications

Structure

Working Theory

Features

Definitions of the characteristics

H type

H-A type

E type

K type

V type

VS type

Y type

L type

P type

N type

EP type