Ashcroft T4 Specifications
222
Temperature Switches
Watertight Enclosure,
Type 400, B-Series
This broad Ashcroft® switch series
is easy to use and readily retrofits to
virtually all process, industrial and
OEM applications.
• Watertight NEMA 4X, IP66
enclosure
• Choice of switch elements
for all applications, including
hermetically sealed (NEMA 4 meets
Class I, Div. 2, Groups A, B, C, & D
with hermetically sealed switch)
• UL, CSA listings standard
1 - ENCLOSURE
T4 - Temperature switch, type 400, watertight
enclosure meets NEMA 3, 4, 4X and 13,
IP66 requirements
2 - SWITCH ELEMENTS
Order Description/Maximum Electrical Ratings
Code UL/CSA Listed SPDT
(4)
20
21 Ammonia service 5A, 125/250 Vac
Hermetically sealed
22
deadband
23 Heavy duty ac 20A,125/250 Vac
15A,125/250/480 Vac
24
1/4A, 250 Vdc
25 Heavy duty dc 10A,125/ Vac or dc
1/8HP 125/ Vac or dc
26
proof
27 High temp. 300°F 15A, 125/250 Vac
28
on increasing
29 Manual reset trip 15A, 125/250 Vac
on decreasing
31 Low level (gold) 1A,125/250 Vac
contacts
Hermetically sealed
32 switch, general 11A, 125/250 Vac
purpose 5A, 30 Vdc
50 Variable deadband 15A,125/250 Vac
61
62
ment proof
63 Dual high temp. 300°F 15A, 125/250 Vac
15A,125/250/480 Vac
64 Dual general purpose 1/2A, 125 Vdc
1/4A, 250 Vdc
65 Dual ammonia service 5A, 125/250/480
Narrow deadband 15A, 125/250 Vac
(3)
switch, narrow 5A, 125/250 Vac
(1)
General purpose 1/2A, 125 Vdc
(4)
Sealed environment 15A, 125/250 Vac
Manual reset trip 15A, 125/250 Vac
UL/CSA Listed Dual SPDT
(4)
Dual narrow deadband 15A, 125/250 Vac
(4)
Dual narrow environ- 15A, 125/250 Vac
(2)
• Setpoints adjustable from 15-100%
of range
• Wetted material is all-welded
stainless steel
• Fixed or limited adjustable
deadband
• Readily available
3 - THERMAL SYSTEM SELECTION
DIRECT MOUNT
Order Code System Material Style
TS 316 stainless steel Rigid
REMOTE MOUNT
Order Code System Material Line Length Style
T05 316 stainless steel 5´ Capillary
T10 316 stainless steel 10´ with
T15 316 stainless steel 15´ 302 SS
T20 316 stainless steel 20´ Spring
T25 316 stainless steel 25´ Armor
4 - BULB LENGTH SELECTION
DIRECT MOUNT
Minimum
Order Code “S” Dimension Thermowell
“U” Dimension
027 2
040 4˝ 2
060 6˝ 4
090 9˝ 7
120 12˝ 10
REMOTE MOUNT
030 3˝ 2
(6)
3
⁄4˝ —
5 - OPTIONS
See pages 238-239
6 - STANDARD TEMPERTATURE RANGES
See page 235
TO ORDER THIS B-SERIES TEMPERATURE SWITCH:
(5)
NOTES:
1. Standard switch.
2. Dual switches are 2 SPDT snap-action switches not
independently adjustable.
3. Estimated dc rating, 2.5A, 28 Vdc (not UL listed).
4. Estimated dc rating, 0.4A, 120 Vdc (not UL listed).
5. Additional line lengths available, call factory.
6. Additional bulb lengths available, call factory.
1
⁄2˝
1
⁄2˝
1
⁄2˝
1
⁄2˝
1
⁄2˝
Switches calibrated at 70°F ambient reference.
HERMETICALLY SEALED SWITCH
We recommend hermetically sealed switch elements
for improved reliability. The hermetically sealed switch
provides uncompromising contact protection in harsh
or corrosive environments. The Ashcroft 400 Series is
also approved for installation in Division II hazardous
areas when supplied with hermetically sealed contacts.
Features:
• UL-recognized component,
guide WSQ2, File E85076
• All-stainless steel welded
construction
LOOK FOR THIS AGENCY
MARK ON OUR PRODUCTS
Select: T4 20 T05 030 XNH 150° to 260°F
1. Enclosure:
2. Switch Element:
3. Thermal System:
4. Bulb Length:
5. Options (see pages 238-239):
6. Temperature Range (see page 235):
Consult factory for guidance in product selection
Phone (203) 385-0217, Fax (203) 385-0602 or
visit our web site at www.ashcroft.com
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