Axial Lead Reed Switches
High Power > DRS-50
DRS-50 50.8mm High Power Reed Switch
RoHS
Description
The DRS-50 Reed Switch is a standard, normally open switch with a 50.80mm
long x 5.25mm diameter (2.000 x .207) glass envelope, capable of high voltage
and power switching up to 400Vdc at 2mA. Will carry 6A and switch up to
10
100W/VA. It has high insulation resistance of 10 ohms minimum and contact
resistance of less than 100 milli-ohms.
Features
Normally open switch Available sensitivity range
Capable of switching 400Vdc or 42-83 AT
3.0A at up to 100W
Minimum voltage breakdown
600Vdc
Agency Approvals
Benefits
Agency Agency File Number Ampere-Turns Range
Hermetically sealed switch Capable of switching European
E47258
contacts are not affected by and mains voltage
42-83 AT
E471070
have no effect on their external Zero operating power required for
environment contact closure
DEMKO 14 ATEX 1393U 42-83 AT
Applications
Note: Contact Littelfuse for specific agency approval ratings.
Industrial applications
Security
White Goods
Limit switching
Dimensions
Dimensions in mm (inch)
CL OF OVERLAP
5.25 0.53
41.27 Switch Type
(.207) MAX. (.021) REF.
(1.625) REF.
12.70
(.500) REF.
Contact Form A (SPST-NO)
15.24 50.80 Body: Glass
Materials
(.600) MIN. (2.000) MAX.
Leads: Tin-plated Ni-Fe wire
82.55
(3.250) MAX.
Note: SPST-NO = Single-pole, single-throw, normally open
Electrical Ratings
1
Contact Rating W/VA - max. 100
2
Switching Vdc - max. 400
3
Voltage Vac - max. 280
4
Breakdown Vdc - min. 600
2
Switching Adc - max. 3.0
3
Current Aac - max. 2.1
Carry Adc - max. 6.0
Contact, Initial - max. 0.100
Resistance
10
Insulation - min. 10
Capacitance Contact pF - typ. 0.6
Operating C -40 to +125
Temperature
5
Storage C -65 to +125
Notes:
1. Contact rating - Product of the switching voltage and current should never exceed the wattage rating. Contact Littelfuse for additional load/life 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 and 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
2017 Littelfuse Revised: 12/18/17 littelfuse.com
Specifications are subject to change without notice.Axial Lead Reed Switches
High Power > DRS-50
DRS-50 50.8mm High Power Reed Switch
Product Characteristics
Operating Characteristics
1
Operate Time 4.5ms - max.
1
Release Time 2.5ms - max.
2
Shock 11ms 12 sine wave 100G - max.
2
Vibration 50-2000 Hertz 30G - max.
Resonant Frequency Hz - typ. 850Hz - typ.
Magnetic Characteristics
3
Pull-In Range Ampere Turns 42-83
4
Rating Sensitivity Ampere Turns 60
Test Coil L4988
Notes:
1. Operate (including bounce)/Release Time - per EIA/NARM RS-421-A,diode suppressed coil (Coil IV).
2. Shock and Vibration - per EIA/NARM RS-421-A and MIL-STD-202.
3. Pull-In Range - Contact Littelfuse for narrower AT ranges available.
4. Rating Sensitivity - The value at which contact ratings and operating characteristics are determined. Derating may be required below this value.
5. Custom modifications of forming and/or cutting of reed switches are available. Please contact Littelfuse.
Drop-Out vs. Pull-In Chart Part Numbering System
50
DRS-50-42-83
40
Max.
Min.
30
Series
20
AT Range
42-48 AT
Example:
42-53 AT
10 42-83 AT product is
42-83 AT
DRS-50-42-83
47-53 AT
0
0 10 20 30 40 50 60 70 80 90 47-58 AT
Pull-In (L4988 Coil) 47-68 AT
Note: Chart represents the range of Drop-Out, min to max for a given Pull-In value.
57-63 AT
57-68 AT
62-68 AT
62-78 AT
67-73 AT
67-83 AT
77-83 AT
62-73 AT
Note: These AT values are the before-modification values of the bare reed switch.
2017 Littelfuse Revised: 12/18/17 littelfuse.com
Specifications are subject to change without notice.
Drop-Out (L4988 Coil)