littelfuse.com© 2019 Littelfuse Revised: 10/29/19
Specifications are subject to change without notice.
Reed Relays
DIL Packaged > HE700
HE700 Miniature Dual In-line Reed Relay
Description
The HE700 is a miniature reed relay in a DIL package with a choice of normally
open, normally open high voltage, normally closed or changeover contacts
capable of switching up to 300Vdc at 10W. It is available with 5V, 12V, and 24V
coils and diode suppression and also available with magnetic shield option.
Agency Approvals
Agency Agency File Number
E47258
Features
• Miniature dual in-line package
• Optional coil suppression diode to
protect coil drive circuits
• External magnetic shield option
• Diode suppression option
• RoHS Compliant
• UL Recognized to UL 508 as an
Industrial Control Switch
Benefits
• One relay, various contacts choices
reducing space and cost without
compromising flexibility
• Lower power coil consumption than
competing electromechanical
devices.
• Hermetically sealed switching
contact is immune to the effects of
its environment
• Transfer molded package gives
maximum component protection
Applications
• Security Systems
• Telecom Equipments
• Process Control Systems
• Industrial Equipments
• Instrumentation
Dimensions
Dimensions in mm (inch)
Table 1: Dimension
Relay Type Body Type L W H
HE700 Transfer Molded 19.05 (.750) 7.22 (.284) 5.50 (.217)
External Shield 20.14 (.793) 7.62 (.300) 5.82 (.229)
0.51
(.020)
0.51NOM.
(.020)
15.24 NOM.
(.600)
3.00 NOM.
(.118)
19.05
(.750)
20.14
(.793)
Fig. 1: HE700
10.16 NOM.
(.400)
H
0.51
(.020)
0.51NOM.
(.020)
15.24 NOM.
(.600)
3.00 NOM.
(.118)
0.25 NOM.
(.010)
9.52
(.375)
Fig. 2: HE751 Fig. 3: HE700 (All)
10.16 NOM.
(.400)
H
W
Note: Not all parts are UL Recognized. Contact Littelfuse for specific parts and agency
approval ratings.
littelfuse.com© 2019 Littelfuse Revised: 10/29/19
Specifications are subject to change without notice.
Reed Relays
DIL Packaged > HE700
HE700 Miniature Dual In-line Reed Relay
Table 2: Electrical and Operating Characteristics @ 25°C
Column Number 1 2 3 4
Contact Type Form A
SPST, DPST
Standard
Form C
SPDT-CO
Standard
Form A
SPST
High Voltage
Form B
SPST-NC
Standard
Relay Types HE721, HE722 HE721C/E/R HE751 HE721
Contact Rating 1
Power, Switching
Voltage, Switching
Current, Switching
Current, Carry
Watt - max.
Vdc - max.
A - max.
A - max.
10
200
0.5
1.2
5
175
0.25
1.5
10
300
0.5
1.2
10
200
0.5
1.5
Voltage Hold-off 4
Across Open Contacts
Contacts to Coil
Coil to E. Shield
Between Isolated Terminals
Vdc - min.
Vac - min.
Vac - min.
Vac - min.
250
500
150
500
200
500
150
N/A
450
4000
N/A
N/A
250
500
N/A
N/A
Resistance 5
Contact, Initial
Insulation Across Open Contacts
Insulation Between Isolated
Terminals
Ω max.
Ω min.
Ω min.
0.150
1010
1010
0.200
1010
1010
0.150
1010
1010
0.150
1010
1010
Timing Operate Time
Release Time ms - max.
ms - max. 1.0
1.0 3.0
3.0 1.0
1.0 1.0
1.0
Environmental
Temperature, Operating
Temperature, Storage
Vibration Resistance
Shock Resistance
°C
°C
G - max. 10-2000 Hz.
G - max. 11 ms ½ sine
-40 to +85
-40 to +105
20
50
-40 to +85
-40 to +105
20
50
-20 to +85
-40 to +105
20
50
-40 to +85
-40 to +105
20
50
Part Numbering System
HE7X - X - X - X - XX
Contact Type
A - Form A (SPST-NO or DPST-NO)
B - Form B (SPST-NC)
C - Form C (SPDT-CO)
E - Form C (SPDT-CO) alternate foot print 1
R - Form C (SPDT-CO) alternate foot print 2
Number of Contacts
1 and 2
General Options
00 - No Options
10 - Coil Suppression Diode
20 - Electrostatic Shield
30 - Coil Diode and E.S. Shield
40 - External Magnetic Shield
50 - External Magnetic Shield and Diode
Model Number
HE72 - Standard
HE75 - High Voltage
Standard Coil
05 - 5 Volt
12 - 12 Volt
24 - 24 Volt
Note: Not all combinations of Part Number suffixes are available. Contact Littelfuse for details.
littelfuse.com© 2019 Littelfuse Revised: 10/29/19
Specifications are subject to change without notice.
Reed Relays
DIL Packaged > HE700
Packaging
Packaging
Option Packaging
Specification Quantity Quantity &
Packaging
Code
Taping
Width
Bulk Bulk 1000/5000 N/A N/A
HE700 Miniature Dual In-line Reed Relay
Table 3: Coil Characteristics @ 25°C
Contact
Form
Electrical and
Operating
Characteristics Dimensions Part Number Nominal
Coil Voltage
Vdc
Coil
Resistance
±10% Ohms
Must
Operate
Vdc
Must
Release
Vdc
Maximum
Coil Voltage
Vdc
Top View 2.54mm (0.1") Grid
Dot on Case: Pin 1
Numbers not printed on case.
1A
SPST-NO See Table 2
Column 1 Figure 1
HE721A0500
HE721A1200
HE721A2400
5
12
24
500
1000
2150
3.75
8.0
16.0
0.5
1.0
2.0
12
31
46
1B
SPST-NC See Table 2
Column 4 Figure 1
HE721B0500
HE721B1200
HE721B2400
5
12
24
500
500
2150
3.75
9.0
18.0
0.5
1.0
2.0
6.5
14
28
1C
SPDT-CO See Table 2
Column 2 Figure 1
HE721C0500
HE721C1200
HE721C2400
5
12
24
200
500
2000
3.75
8.0
16.0
0.5
1.0
2.0
14
22
44
1C
SPDT-CO See Table 2
Column 2 Figure 1
HE721E0500
HE721E1200
HE721E2400
5
12
24
200
500
2000
3.75
8.0
16.0
0.5
1.0
2.0
14
22
44
1C
SPDT-CO See Table 2
Column 2 Figure 1
HE721R0500
HE721R1200
HE721R2400
5
12
24
200
500
2000
3.75
8.0
16.0
0.5
1.0
2.0
14
22
44
2A
DPST-NO See Table 2
Column 1 Figure 1
HE722A0500
HE722A1200
HE722A2400
5
12
24
200
500
2150
3.75
8.0
16.0
0.5
1.0
2.0
12
22
46
1A
SPST-NO
High Voltage
See Table 2
Column 3 Figure 2
HE751A0500
HE751A1200
HE751A2400
5
12
24
500
1000
2150
3.75
8.0
16.0
0.5
1.0
2.0
12
31
46
HE700 PCB LAYOUT (Bottom View)
12.70
(.500)
Ø0.61 HOLE
(.024)
15.24
(.600
)
2.54
(.100)
7.62
(.300)
Notes:
1. HE721B - Exceeding recommended voltage may cause contact reclosure.
2. Optional external magnetic shield not available on Form B relays.
Notes 1 and 2
Disclaimer Notice - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and
test each product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications.
Read complete Disclaimer Notice at http://www.littelfuse.com/disclaimer-electronics.
