Page 1

www.sensata.com

| IAL/CEL/LEL SERIES

HYDRAULIC MAGNETIC CIRCUIT PROTECTORS

Introduction

IAL/IUL/IEL/LEL magnetic circuit protectors provide low-cost power switching, reliable circuit protection and accurate circuit control for equipment in

the international marketplace.

IAL models are for those applications where the unit’s inherent attributes are desired, but compliance with the various standards is not required.

IUL models have been tested and approved in accordance with UL 1077

requirements for UL recognition.

IEL/LEL models are TUV approved to IEC 60947-2. They meet IEC spacing

requirements, mandatory for equipment which must comply with IEC

speciﬁcations. In addition, the IEL models are UL recognized to UL 1077

as supplementary protectors and the LEL models are UL listed under the

conditions of UL 489. Both are CSA certiﬁed and CCC Approved. The IEL

is CSA certiﬁed as a supplementary protector per CSA C22.2–No. 235.

The CEL model has achieved two new enhancements, including a single

pole, 125 amp rating with TÜV approval, and a parallel 4-pole version

with 400 amp rating.

Airpax™ IAL/CEL/LEL circuit protectors are available in a wide variety

of conﬁgurations, including series, series with auxiliary switch, shunt

and relay with choice of delays and ratings in DC and/or 50/60Hz or

400Hz versions. Single or multi-pole versions are available with a

variety of pole arrangements to meet your speciﬁcations. Please see

the appropriate product speciﬁcation table for ratings and limitations.

SINGLE POLE, STANDARD STUD TERMINAL

(SEE TABLE)

[3.56]

.140

[3.61]

.142

[47.22]

1.859

[17.53]

.690

OFF

[7.14]

.281

[49.28]

1.940

STUD TERMINAL TYPES

Screw Stud Thread Dimension “A” Dimension “B”

M6 .510 ± .045

[12.95 ± 1.14]

.652 ± .035

[16.56 ± 0.89]

1/4 -20 .545 ± .045

[13.84 ± 1.14]

.687 ± .035

[17.45 ± 0.89]

M5 .510 ± .045

[12.95 ± 1.14]

.652 ± .035

[16.56 ± 0.89]

10-32 .545 ± .045

[13.84 ± 1.14]

.687 ± .035

[17.45 ± 0.89]

Tolerance ± .015 [.39] unless noted.

Dimensions in brackets [ ] are millimeters.

www.sensata.com

Page 2

[19.05]

.750

[36.53]

1.438

[63.24]

2.490

[10.21]

.402

[5.59]

.220

[52.32]

2.060

2X 6-32 THREAD

.140 [3.56] DEEP

M3 ISO THD. OPTIONAL

[7.13]

.281

[49.28]

1.940

[3.61]

.142

Screw Terminal

Single Pole

[7.13]

.281

[49.28]

1.940

[6.35]

ÿ .250 MAX.

[15.04]

.592

[9.96]

.392

[9.53]

.375

Clip Terminal

[24.57]

.967

Bullet Terminal

[19.18]

.755

[52.32]

2.060

[36.78]

1.448

[3.96]

2X ÿ .156

[10.98]

.432

Mounting Detail

Panel Mounting Detail

Tolerance ±.005 [.13] unless noted.

Notes:

A Terminal protrusion dimensions are referenced from back of mounting panel.

B Each screw terminal is supplied with a 10-32x.312 [7.92] or M5 x 8mm screw, ﬂatwasher and external tooth lockwasher.

C Stud terminals are supplied with a ﬂatwasher, external tooth lockwasher and a 10-32 or M5 hex nut (<=70A) (<=50A for LEL),1/4-20 or M6 hex nut

(>70A)(>50A for LEL).

Bullet terminal receptacle should be .312 ± .001 diameter hole not less than .250 depth. Contact Sensata for other bullet sizes.

Each outer terminal is supplied with a ﬂatwasher, tooth lockwasher and a hex nut.

MULTI-POLE CIRCUIT PROTECTORS

Multi-pole units are combined in an assembly with the trip mechanisms internally coupled. A fault in any protected circuit opens all poles simultaneously.

Applications include use in polyphase circuits, single-phase three-wire systems, or in two or more related but electrically isolated circuits. A mix of

delays, ratings and conﬁgurations are offered. The auxiliary switch is offered with either gold or silver contacts and is available when a series

construction pole is speciﬁed.

An assembly consisting of two single pole units, having their trip mechanisms internally coupled, is available with either a single toggle handle

or with a handle per pole. Please see decision one of the part number decision tables. Individual poles may vary in ratings, delays and internal

conﬁgurations. If the poles are of series construction, an auxiliary switch may be included in either or both poles, allowing you to mix SELV and

hazardous voltages.

Two Pole