Reed Relay Datasheet
HE700
Miniture 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.
Features
■ Miniature dual in-line package
■ Diode suppression option
■ Optional coil suppression
diode to protect coil drive
circuits
■ RoHS Compliant
■ External magnetic shield
option
■ UL Recognized to UL 508 as
an Industrial Control Switch
Benefits
■ One relay, various contacts
choices reducing space and
cost without compromising
flexibility
Additional Information
■ 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
Resources
Accessories
Samples
■ Industrial Equipments
■ Telecom Equipments
■ Instrumentation
■ Process Control Systems
Agency Approvals
Agency
■ Security Systems
Agency File Number
E47258
Note: Not all parts are UL Recognized. Contact Littelfuse for specific parts and agency approval ratings.
1
© 2020 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: BA.12/16/20
Reed Relay Datasheet
HE700
Miniture Dual In-line Reed Relay
Dimensions
Dimensions in mm (inch)
Relay Type
HE700
Body Type
L
W
H
Transfer Molded
19.05 (.750)
7.22 (.284)
5.50 (.217)
External Shield
20.14 (.793)
7.62 (.300)
5.82 (.229)
HE700
HE751
19.05
(.750)
W
H
0.51
(.020)
H
0.51
(.020)
10.16 NOM.
(.400)
0.51NOM.
(.020)
15.24 NOM.
(.600)
HE700 (All)
20.14
(.793)
3.00 NOM.
(.118)
10.16 NOM.
(.400)
0.51NOM.
(.020)
15.24 NOM.
(.600)
0.25 NOM.
(.010)
3.00 NOM.
(.118)
9.52
(.375)
Table 2: Electrical and Operating Characteristics @ 25°C
Form A SPST,
DPST Standard
Characteristics
Contact Type
Form C SPDT-CO
Form A SPST
Standard
High Voltage
Relay Types
Form B SPST-NC
Standard
HE721, HE722
HE721C/E/R
HE751
HE721
Watt - max.
Vdc - max.
Vac - max.
Adc - max.
Aac - max.
Adc - max.
10
200
140
0.5
0.35
1.2
5
175
120
0.25
0.18
1.5
10
300
265
0.5
0.35
1.2
10
200
140
0.5
0.35
1.5
Voltage Hold-off4
Across Open Contacts
Contacts to Coil
Coil to E. Shield
Between Isolated Terminals
Vdc/Vac Peak - min.
250
500
150
500
200
500
150
N/A
450
4000
N/A
N/A
250
500
N/A
N/A
Resistance
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, Storage5
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
Power, Switching
Voltage, Switching2
Contact Rating1
Current, Switching3
Current, Carry
Notes:
1. Contact rating - Product of the switching voltage and current should never exceed the wattage rating. Contact Littelfuse for additional load/lofe information.
2. When switching inductive and/or capacitive loads, the effects of transient voltages and/or currents should be considered. Refer to Application Notes AN108A & AN107 for details.
3. Electrical Load Life Expectancy - Contact Littelfuse with voltage current values along with type of load.
4. Breakdown Voltage - Per MIL-STD-202, Method 301.
5. Storage Temperature - Long time exposure at elevated temperature may degrade solderability of the leads.
Part Numbering System
HE7X - X - X - X - XX
Model Number
HE72 - Standard
HE75 - High Voltage
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
Contact Type
A - Form A (SPST-NO or DPST-NO)
Standard Coil
B - Form B (SPST-NC)
05 - 5 Volt
C - Form C (SPDT-CO)
12 - 12 Volt
E - Form C (SPDT-CO) alternate foot print 1
24 - 24 Volt
R - Form C (SPDT-CO) alternate foot print 2
Note: Not all combinations of Part Number suffixes are available. Contact Littelfuse for details.
2
© 2020 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: BA.12/16/20
Reed Relay Datasheet
HE700
Miniture Dual In-line Reed Relay
Table 3: Coil Characteristics @ 25°C
Contact
Form
1A
SPST-NO
1B
SPST-NC
1C
SPDT-CO
1C
SPDT-CO
1C
SPDT-CO
2A
DPST-NO
1A
SPST-NO
High Voltage
Electrical and
Operating
Dimensions
Characteristics
See Table 2
Column 1
See Table 2
Column 4
See Table 2
Column 2
See Table 2
Column 2
See Table 2
Column 2
See Table 2
Column 1
See Table 2
Column 3
Part Number
HE721A0500
HE721A1200
HE721A2400
Figure 1
HE721B0500
HE721B1200
HE721B2400
Figure 1
HE721C0500
HE721C1200
HE721C2400
Figure 1
HE721E0500
HE721E1200
HE721E2400
Figure 1
HE721R0500
HE721R1200
HE721R2400
Figure 1
HE722A0500
HE722A1200
HE722A2400
Figure 1
HE751A0500
HE751A1200
HE751A2400
Figure 2
Nominal
Coil
Must
Coil
Resistance
Operate
Voltage
±10%
Vdc
Vdc
Ohms
5
12
24
5
12
24
5
12
24
5
12
24
5
12
24
5
12
24
5
12
24
500
1000
2150
500
500
2150
200
500
2000
200
500
2000
200
500
2000
200
500
2150
500
1000
2150
3.75
8.0
16.0
3.75
9.0
18.0
3.75
8.0
16.0
3.75
8.0
16.0
3.75
8.0
16.0
3.75
8.0
16.0
3.75
8.0
16.0
Must
Release
Vdc
Maximum
Coil
Voltage
Vdc
0.5
1.0
2.0
12
31
46
0.5
1.0
2.0
Top View 2.54mm (0.1") Grid
Dot on Case: Pin 1
Numbers not printed on case.
14 13
6.51,2
141,2
281,2
0.5
1.0
2.0
0.5
1.0
2.0
0.5
1.0
2.0
0.5
1.0
2.0
0.5
1.0
2.0
14
22
44
E.S.
1 2
6 7
14 13
9 8
E.S.
1 2
6 7
14 13
9 8
E.S.
6 7
1 2
14 13
14
22
44
E.S.
E.S.
12
22
46
12
31
46
9 8
6 7
1 2
14 13
9 8
6 7
1 2
14 13
14
22
44
9 8
E.S.
9 8
1 2
6 7
14
9 8
2
6
Notes:
1. HE721B - Exceeding recommended voltage may cause contact reclosure.
2. Optional external magnetic shield not available on Form B relays.
HE700 PCB Layout (Bottom View)
Ø0.61 HOLE
(.024)
Packaging
2.54
(.100)
12.70
(.500)
Packaging
Option
Packaging
Specification
Quantity
Bulk
Bulk
1000/5000
Quantity
&
Taping Width
Packaging Code
N/A
N/A
15.24
(.600)
7.62
(.300)
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.
3
© 2020 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: BA.12/16/20
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