Watlow E-SAFE II Data sheet

E-SAFE

II HYBRID POWER SWITCH

E-SAFE®II Provides
Power Switching at
High Amperage and
High Ambient
Temperatures

®

Watlow's patent pending E-SAFE®II hybrid power switch
provides reliable
35 amperes at 70°C (158°F).
specifically designed to operate in the higher ambient
temperatures of foodservice applications.

The use of mercury relays is being eliminated due to many
regulations affecting its use in the United States and around
the world. When replacing mercury-relay switches, the E-SAFE
II is the best performing product at the most economical price.
Because of the product's unique design, there is no need to
purchase costly heat sinks used with traditional solid state
relays (SSRs). In addition, this is a three-phase device, so there
is no need to wire multiple command signals. With a switching
life of millions of cycles and an ambient rating of 70°C (158°F),
with no heat sink required, this product is more superior than
typical SSRs.

The E-SAFE II hybrid power switch provides foodservice
operators with longer contact life and higher performance than
typical mechanical contactors used in equipment. By using
Watlow’s patent pending NO-ARC technology, the E-SAFE II
can switch millions of cycles increasing the life of the product
with decreased noise and increased temperature accuracy.
E-SAFE II's inherent ability to operate at fast cycle time
provides a nice complimentary product for a time proportioning
(PID) controller.

Not only are you faced with mercury phase outs in order to
compete in the international market, you must consider RoHS
compliancy. E-SAFE II, while being mercury free, is also RoHS
compliant by design, CE approved and C-UL
The reliability of the product is protected by a 24 month
warranty.

and accurate power switching up to

This mercury-free product is

®

/UL®recognized.

Features and Benefits

Mercury-free hybrid power switch

• Improves safety by eliminating risk of toxic metals in

conjunction with food

• Adheres to federal and state regulations of phase out and

banning programs of mercury

High ambient temperature rating of 70°C (158°F)

• Specifically designed to operate in the higher ambient

temperatures of foodservice applications

NO-ARC technology

• Combines hybrid solid state technology and mechanical

output

• Allows faster cycling times

• Delivers more precise temperature control, saves energy,

extends heater life and creates a lower lifetime cost

Compact and touch-safe package

• Fits in shallow foodservice cabinets

• Allows for horizontal or vertical mounting installations

• Increases safety for installer/operator

• Uses Ultem

170°C (338°F) and a UL

RoHS compliant by design

• Specifically designed to meet Asian and European

requirements

LED indicator light

• Indicates command signal presence from controller

• Assists in trouble shooting

Agency approvals

®

UL

•

• WEEE compliant

®

enclosure material with an HB rating of

recognition, C-UL®and CE

®

flame retardant rating of 94 5VA

Applications

• Griddles • Fryers

Conveyor ovens

Convection ovens

•

• Steamers • Holding cabinets

Toaster ovens •

•

Multiple U

UL®and C-UL®are registered trademarks of Underwriter's
Laboratories, Inc.

®

is a registered trademark of General Electric Company.

Ultem

© 2007 Watlow Electric Manufacturing Company Printed in the USA on Recycled Paper, 15 Percent Postconsumer Waste

.S. and International P

•

Dishwashers/warewashers

atents P

ending

WIN-ESRII-0507

1241 Bundy Boulevard, P.O. Box 5580
Winona, Minnesota 55987-5580 USA
Phone: [phone]
FAX: [phone]
Internet: www.watlow.com
e-mail: [e-mail]

Specifications

6.35 mm
(0.25 in.)

97.03 mm
(3.82 in.)

82.55 mm
(3.25 in.)

140.72 mm
(5.54 in.)

48.51 mm
(1.910 in.)

14.88 mm
(0.586 in.)

46.99 mm
(1.85 in.)

23.88 mm
(0.94 in.)

utput voltage

O

200/240VÅ(ac) +10/-15 percent, 50/60Hz, 100/120VÅ(ac)

•

10/-15 percent, 50/60Hz

+

Output amperage

• Up to 40A single, dual and three-phase

Operating environment

• 0 to 70°C (32 to 158°F) operating temperature

• 0 to 90 percent RH, non-condensing

• Operational life: four million switching cycles

• Installation category III, pollution degree 2

Control mode

NO-ARC hybrid contactor

•

Input command signal

• 3 to 32VÎ(dc), 24VÅ(ac) +20/-20 percent, off state

≤2.7VÎ(dc)

• 100 to 240VÅ(ac) +10/-15 percent, [85 to 264VÅ(ac)]

Note: On the 100 to 240VÅ(ac) input models, do not use a
RC snubber on the E-SAFE II relay input or the temperature
control command signal output.

LED indicator light

• Built in LED assists in trouble shooting; LED "off" indicates

relay(s) are open, LED "on" indicates relay(s) are closed.

Input command signal terminals

•1⁄4 inch fast on appliance

Line and load terminals

• No. 10 screw will accept ring or spade,

6.35 mm (

1

⁄4 in.) x 10-32

Mounting

• Back panel mount, horizontal or vertical mounting options

Dimensional Drawings

Ordering Information

E S2_ - _ _ _ _ - _ _ _ _

E-SAFE II = Hybrid Power Switch
Number of Poles

1 = 1 pole
2 = 2 poles controlled
3 = 3 poles controlled

Load Voltage

1 = 100 to 120VÅ(ac)
2 = 200 to 240V
3 = 230/277V

wye/star, neutral connected to center
required]

Command Signal Voltage

LV = Low voltage 3 to 24VÎ(dc) or 24VÅ(ac)
HV= High voltage 100 to 240V

+10/-15 percent, [85 to 264V

Future Option
Future Option
Custom Parameters

000 = Standard product
Any three letters or numbers = cosmetic options

Å(ac)

Å(ac) [400/480VÅ(ac) with

Å(ac)

Å(ac)]

Product Rating Curve

70

65

60

6 AWG
90°C Wire

0

0

55

50

45

40

Ambient Temperature °C

35

30

25

UL®Conditions of Acceptability

Applications must be tested as described below for specific wire
insulation or specific wire gauge sizes. Tests shall be performed in
the end application under worst case operating conditions.

Test Procedure

Monitor temperatures of terminals, using thermocouples between the

A.

ring terminal and connectors L1, L2 or L3. The temperature must not
exceed 95°C (203°F).
Monitor temperatures of wire insulation, using a thermocouple located

B.

three inches from the connector. The temperature must not exceed the

insulation rating of the wire.
*30A is maximum rating when operating above 240VÅ(ac).
Warning: Thermocouples attached to terminals will be at load voltage
potential, measurements need to be taken with isolated equipment or
isolate the sensor from terminal with suitable insulation.

10 AWG 90°C Wire

5

10

15

20

Amperage

8 AWG 90°C Wire

25 30* 35

These ratings apply to
3-phase units with cycle
times of 30 seconds or
more. Consult the
factory for 1- and
2-phase unit ratings.

To be automatically connected to the nearest North American Technical and Sales Office call:

1-800-WATLOW2

International Technical and Sales Offices:

Germany, [phone] • Italy, [phone] • Japan, [phone] • Korea, [phone] • Malaysia, [phone] •
Mexico, [phone] • Shanghai, [phone] • Singapore, [phone] • Spain, [phone] • Sweden, [phone] •
Taiwan, [phone] • United Kingdom, [phone]

Australia,

[phone] • China, [phone] • France, [phone] •