DATA S H E E T
Thermal Cutoff SEFUSE
TM
SF/E SERIES
ORGANIC THERMAL SENSITIVE PELLET TYPE
10 AMPERES RATED CURRENT
NEC's thermal cutoff SE/E series is small, solid and reliable product which can be used under 10 amperes of
rated current. It protects home appliances and industrial equipment from fire by opening of electrical circuit if it
senses an abnormal temperature rise.
FEATURES
™
Approved by UL(USA), CSA(Canada), VDE(Germany), BEAB(UK), and MITI(Japan)
™
Single operation
™
Compact, durable and reliable by hermetic seal structure
™
Excellent sensitive to abnormal temperature rise and high accuracy in operation
™
Stable characteristics in a long-term
™
Capable of opening at large cutoff current of AC 10 amperes
APPLICATIONS
Electric home appliances
Electric industeial equipments
Office automation equipments
Plain paper copiers
Transformers
Motors, etc.
OUTLINE DIMENSIONS (mm)
φ
1.0
φ
4.2
20(35)
11
66(81)
35
Note:
Dimensions in ( ) are for long lead devices.
The information in this document is subject to change without notice.
Document No. EM0244EJ2V1DS00
(KC–15003)
Date Published February 1998 M
Printed in Japan
φ
1.0
©
1996
SF/E SERIES
TYPE NAME DESIGNATION
SF
139
E
–1
Lead Length (none: standard lead type, –1: long lead type)
Series Name (SF/E series)
Operating Temperature
Type Name (SF type)
MARKING
∗
Factory Code
SEFUSE
S F 1 3 9 E
Tf142˚C
10 A
250V ~
Brand Name
Type Name
Production Control No.
∗∗
Rated Functioning Temperature
Rated Current
Rated Voltage
MITI
Approved Mark
∗
Factory Code represents the manufactured placce as shown below.
Japan : none, Thailand : B
∗∗
Designation of Production Control No.
(example)
98 7 0
Sub-Lot No.
Manufactured month (1 to 9 as Jan. to Sep. and X, Y, Z as Oct., Nov. and Dec.)
Manufactured year (last two figures of A. D.)
2
SF/E SERIES
STANDARD RATINGS
Type
Name
SF70E
SF76E
SF91E
SF96E
SF109E
SF119E
SF129E
SF139E
SF152E
SF169E
SF188E
SF214E
SF226E
SF240E
Rated
Operating
Functioning
Temperature
Temperature
73 ˚C
77 ˚C
94 ˚C
99 ˚C
113 ˚C
121 ˚C
133 ˚C
142 ˚C
157 ˚C
172 ˚C
192 ˚C
216 ˚C
227 ˚C
240 ˚C
70±2 ˚C
0
76±2
4
T
H
T
h
T
C
45 ˚C
51 ˚C
66 ˚C
71 ˚C
84 ˚C
94 ˚C
104 ˚C
114 ˚C
127 ˚C
144 ˚C
164 ˚C
189 ˚C
190 ˚C
190 ˚C
T
M
Tm
150 ˚C
150 ˚C
150 ˚C
150 ˚C
150 ˚C
150 ˚C
159 ˚C
172 ˚C
189 ˚C
300 ˚C
350 ˚C
Rated
Current
3)
Rated
Voltage
3)
Safety Standard
UL
CSA
VDE
BEAB
made
made
in Japan in Thailand
˚C
33–312
33–331
33–332
10 Aac
250 Vac
LR
52330
6778.2
–4510–
1008
C0623
33–334
33–335
33–336
33–549
4)
33–835
33–834
33–833
33–832
33–831
33–830
33–827
33–828
3
91±2 ˚C
1
96±2 ˚C
3
109±2 ˚C
1
119±2 ˚C
129±2 ˚C
139±2 ˚C
152±2 ˚C
1
169±2 ˚C
3
3
188±2
1
33–333
159 ˚C (Resistive) (Resistive)
E71747
˚C
˚C
1
214±2 ˚C
3
1
226±2
3
2)
237±2 ˚C
350 ˚C
33–354
Notes :
1) The type are for standard lead. When long lead type is required, add “–1” at the end of type name.
2) The maximum temperature limit of SF226E is partially approved as shown below.
RECOGNIZED MAXIMUM TEMPERATURE LIMIT OF SF226E
SF226E
UL
240˚C
∗
CSA
330˚C
VDE
300˚C
BEAB
300˚C
∗
Under application to increase to 300˚C
3) The additional electrical ratings are recognized by UL and CSA as follows.
UL : 277 Vac / 15 A (Resistive), 240 Vac / 15 A (Resistive), 120 Vac / 15 A (Resistive, Inductive),
CSA : 250 Vac max. / 15 A max. (Resistive, Inductive)
4) SF169E, SF188E, SF214E, SF226E and SF240E are recognized the Conductive Heat Aging Test (CH-ratings) of UL.
3
SF/E SERIES
Definition of Terms
q
Rated Functioning Temperature
Rated functioning temperature is the operating temperature of thermal cutoffs, measured using the method
specified in the safety standard. In Electrical Appliance and Material Control Law of Japan, case operation
should be within the specified operating temperature range of
±
7 ˚C. In standards that comply with the IEC
standard (such as UL, CSA, VDE, BEAB), it is called the rated functioning temperature, and should operate
within the prescribed temperature range of +0/–10 C.
It is represented by the symbol TF in the UL standard, and by the symbol Tf in the CSA, VDE and BEAB
standards.
In SEFUSE, a temperature that complies with both standards is set as the rated functioning temperature, and
is indicated on the body of the thermal cutoff.
q
Operating Temperature
Operating temperature is the operating temperature range when the thermal cutoff is made to operate inside
a constant temperature oven whose temperature is raised at the rate of 1 ˚C/min. while a detection current of
100 mA or lower is applied.
The operating temperature is a standard set by NEC and is not specified by a safety standard.
q
TH, Th. Tc (Holding Temperature)
Holding temperature is the maximum temperature at which, when applying a rated current to the thermal
cutoff, the state of conductivity is not changed during 168 hours.
It is represented by the symbol TH in the UL standard, Th in the CSA standard, and Tc in the VDE and BEAB
standards.
q
TM, Tm (Maximum Temperature Limit)
Maximum temperature limit is the maximum temperature for which conductivity does not occur again after
thermal cutoff operation.
It is represented by the symbol TM in the UL standard and by Tm in the CSA, VDE and BEAB standards.
q
Rated Current
Maximum alternating current that can pass through the thermal cutoff and that the thermal cutoff can cut off
in safety and reliability.
q
Rated Voltage
Maximum circuit voltage that the thermal cutoff can cut off in safety and reliability.
4
SF/E SERIES
Performance Data
SF/E Series
Temperature Rise
Response Time
40
SF/E
Temperature Rise (˚C)
30
Time for opening after immersion
into oil (seconds)
40
30
20
20
10
10
0
5
5
10
15
20
10
20
30
40
Temperature difference (˚C)
(oil temp. minus operating temp.)
Pass-through Current (A)
Initial Characteristics
High Temperature Storage Test
+
2
SF169E
169
SF169E
10
6
10
5
10
4
10
6
10
5
10
4
10
6
10
5
10
4
10
6
10
5
10
4
10
6
10
5
10
4
2.0
1.5
1.0
2.0
1.5
1.0
2.0
1.5
1.0
2.0
1.5
1.0
2.0
1.5
1.0
1.5
1.0
0.5
1.5
1.0
0.5
1.5
1.0
0.5
1.5
1.0
0.5
1.5
1.0
0.5
Internal
Resistance
(mΩ/25 mm)
@140˚C
168
167
140
0
–
2
+
2
@119˚C
SF139E
139
138
112
SF139E
0
–
2
+
2
@89˚C
SF109E
111
110
97
SF109E
0
–
2
+
2
@76˚C
SF96E
96
95
71
SF96E
0
–
2
+
2
@50˚C
SF70E
70
69
SF70E
0
–
2
Change of
Part
Number
Operating
Temperature
(˚C)
Insulation
Withstand Voltage
Resistance after
after Operation
Operation
(MΩ)
(kV)
Part
Operating
Number
Temperature
(˚C)
0
10
100
1,000
10,000
Time (Hours)
Note
: The values following @ are the storage temperature.
5
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