Chatham Components: Thermal Fuses and Thermal Cutoffs

TCO Catalog >> NEC/Schott SEFUSE organic pellet and Uchihashi ELCUT eutectic thermal cutoffs

* These items are available in limited quantities and cannot be reordered.

Ratings
Part Number	Rated Functioning Temperature T_f (°C)	Cut-off Temperature (°C)	T_h T_c (°C)	Tm (°C)	Electrical Rating		Approvals
Part Number	Rated Functioning Temperature T_f (°C)	Cut-off Temperature (°C)	T_h T_c (°C)	Tm (°C)	Ampere (A)	Voltage (VAC)	UL	CSA	VDE	CCC	PSE
U21*	102	98 ± 2	76	200	2	250
U22	115	112 ± 3	89	200	2.5	250
U23	130	126 ± 2	102	200	2.5	250
U28	139	135 ± 3	113	200	2.5	250
U25	150	145 ± 2	123	200	2.5	250

UL,C-UL:E50082, CSA: LR57404, VDE: 923000-1171-0011

* These items are available in limited quantities and cannot be reordered.

Cut-off temperature is measured with silicone oil bath of which temperature is increased at the rate of 1° per minute. Detecting current is 0.1A or less.
Th and Tc are for C-UL(CSA) and CCC respectively.

Dimensions

Dimensions (mm)

Lead length

Regular

55 ± 3

70 ± 3

5.7 ± 0.5

6.6 ± 0.5

2.5 ± 0.3

0.53 ± 0.02

Long

Technical Terms

Rated Functioning Temperature (T_f)
The acceptable tolerance is +0,-10°C

Holding Temperature (C-UL&CSA:T_h, CCC:T_c)
The maximum temperature at which the thermal cutoffs may be maintained.

Maximum Temperature Limit (Tm)
The maximum temperature at which an opened thermal cutoff does not reclose.

Notice: Please read Standard Specification and Instruction Manual for details of use.