SDF (15 Amp 250V)

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Thermal Cut-Offs SDF 15A 250V

Thermal Fuses

The SDF Thermal Cut-Offs (Organic Thermal Element Type) are used to prevent fires caused by abnormal heat generation from circuits and other heat producing electrical products. They are a non-resettable thermal fuse which open electrical contacts when temperatures exceed the specified level.

SDF (15 Amp 250V)

Applications

Electric home appliances and heating devices, Coil-winding products and power supplies, Office equipment and telecommunication devices, Automobiles & other electronic components.

General

Our Thermal Cut-Offs (Organic Thermal Element Type) are used to prevent fires caused by abnormal heat generation from circuits and other heat producing electrical products. They are a non-resettable thermal fuse which open electrical contacts when temperatures exceed the specified level.

Applications

• Electric home appliances and heating devices
• Coil-winding products and power supplies
• Office equipment and telecommunication devices
• Automobiles & other electronic components

Operating Principle

When the ambient temperature rises to the functioning temperature, the thermal element melts and the springs move the contact away and open the circuit permanently.

Cautions

• Bends in leads should be at least 3mm from the body of the TCO.
• Extreme caution must be used while soldering, use a heatsink and avoid heating above Tf -24°C.
• The metal portion of the TCO is electrically live and may require insulation.
• Do not use in liquids or poisonous gasses such as sulfuric acid or nitrous oxide.
• Do not connect heater directly to the cutoff.

Approvals

UL & cUL: E117626
VDE: 115369, 116219
PSE: JET2926-32001-1001-1009
CCC: 2003010205079617
EK: HH05009-2004A-2019A

Dimensions (mm)

TypeA (L1)B (L2)
S = Standard25.435.0
L = Long35.035.0
OptionCustom madeCustom Made

Ratings

TF = Functioning Temperature    TH = Holding Temperature
Part No.UL/cULVDECCCPSETF (†C)TH (†C)
DF66SOOOO6642
DF72SOOOO7250
DF77SOOOO7755
DF84SOOOO8460
DF91SOOOO9167
DF98SOOOO9876
DF100SOOOO10078
DF104SOOOO10480
DF110SOOOO11086
DF115SO11595
DF119SOOOO11995
DF121SO12195
DF128SOOOO128106
DF132SO132110
DF139SOO139117
DF141SOOOO141117
DF144SOOOO144120
DF152SOOOO152128
DF167SOOOO167142
DF169SO169145
DF170SOOOO170146
DF179SO179155
DF184SOOOO184160
DF192SOOOO192162
DF216SOOO216191
DF222SO222195
DF228SOOOO228193
DF240SOOOO240200
DF260S260220
DF280S280230

[O] APPROVED [ – ] APPLIED FOR TOLERANCE: +0°C, -5°C

Rated Voltage
& Current Max.

EK250V/15A
UL/cUL125V/15A
250V/10A
250V/16A
VDE250V/15A
PSE125V/15A
250V/15A
CCC250V/15A

Determine the Proper Series

Refer to the diagram on the right when determining the correct temperature setting.
• Tp : The highest temperature of the product to which a cutoff is to be attached.
• Th : The safe temperature range for use of the cutoff.
• Ts : 24°C (Tp-Th) (Apply 35°C for Ts value when Tp is higher than 170°C.)
• To : The heating temperature caused by electrical load (Please refer temperature / current correlation curve)
• +α :
1. Self heating of lead wire
2. Structure of ventilation or airtightness
3. Location of connecting terminal
4. Thickness of insulated covering material
5. Best condition value considering electric voltage changes

Tp + Ts + To +α = Applicable Temperature

Safe Temperature Range

• The increasing temperature by remaining heat in the cutoff after melting is required to remain below Tm.
• The temperature of the area where a cutoff will be attached should not reach overTh under normal usage conditions.