Datasheet

Mounted in an insulating ceramic base, a one shot, hi-limit with confi gurations to suit your requirements...
RD Series Tear Drop Style
The TCO responds to temperature by interrupting an electrical circuit when the operating and /or environmental
temperature exceeds the thermal rating of the fuse. This is accomplished when the organic pellet experiences a phase
change, allowing the spring activated contacts to permanently open the circuit.
The electrical resistance of a RD Series thermal cut offs is comparable to that found in an equal length of 18 gauge solid
copper wire. With proper air fl ow, heat generation below 15 Amperes is minimal. Above 15 Amperes, the upper limit on
current capacity will depend on the environment for each specifi c application.
<RDXXX Electrical Rating>
Voltage(AC) Resistive Current Inductive Current
(Vr) (Ir) (Ib) (Ir) (Ib)
UL
120V / 250V 16.7A 25A - -
120V for only D139
All types except for
D139,D226,D230
Overview Drawing
ELECTRICAL RATINGS
*<Note>All types are RoHS compliant.
33.3
mm
（1.313）
20.5
mm
（0.811）
9.7
mm
（0.385）
23.4
mm
（0.923）
11.9
mm
（0.470）
2.1
mm
（0.085）
9.6
mm
（0.378）
18.5
mm
（0.730）
6.3×0.8
mm
（0.250×.032）
Terminals
(2Plcs)
9.6
mm
（ 0.379
Min.
）
4.7
mm
（0.187
dia.
）
15.8
mm
（0.625）
22.2
mm
（0.875）
THERMAL FUSE
LOCATED IN
THIS POSITION
THERMAL FUSE
MTG
SURFACE
33.3
mm
（1.313）
26.98
mm
（1.062）
9.7
mm
（0.385）
23.4
mm
（0.923）
11.9
mm
（0.470）
2.1
mm
（0.085）
9.6
mm
（0.378）
18.5
mm
（0.730）
6.3×0.8
mm
（0.250×.032）
Terminals
(2Plcs)
9.6
mm
（ 0.379
Min.
）
4.7
mm
（0.187
dia.
）
15.8
mm
（0.625）
22.2
mm
（0.875）
THERMAL FUSE
LOCATED IN
THIS POSITION
THERMAL FUSE
MTG
SURFACE
RDXXX-001F RDXXX-002F
RD SeriesRD Series