Littelfuse DRS-DTH-70-75AT 39.7mm standard changeover reed switch Datasheet

Axial Lead Reed Switches
High Power > DRS-DTH
DRS-DTH 39.7mm Standard Changeover Reed Switch
RoHS
Description
The DRS-DTH Reed Switch is a large changeover switch with a 39.67mm long x
5.33mm diameter (1.562” x 0.210”) glass envelope, capable high voltage and
power switching up to 500Vdc at 2mA, or 0.5A up to 30W/VA. The DRS-DTH has
an insulation resistance of 10 9 ohms minimum and contact resistance of less than
125 milli-ohms.
• Changeover switch
• Capable of switching 500Vdc or
0.5A at up to 30W
• Minimum voltage breakdown
1200Vdc
Dimensions
Dimensions in mm (inch)
Benefits
5.33
(.210) MAX.
1.02
(.040) DIA. REF.
12.45
(.490) NOM.
38.10 - 39.67
(1.500) NOM. - (1.562) MAX.
• Capable of switching European
mains voltage
• Zero operating power required for
contact closure
Applications
• Security
• Limit switching
M
85.73 - 84.14
(3.375) NOM. - (3.3125) MIN.
• Available sensitivity range
50-80 AT
A
27.66
(1.89) REF.
• Hermetically sealed switch
contacts are not affected by and
have no effect on their external
environment
• Can be used as changeover or
normally closed contact
IN
1.83
0.25
(.010) NOM.
(.072) NOM.
1.27
5.54 CL OF OVERLAP
(.050) DIA. REF.
(.218) MAX.
25.40
(1.000) NOM.
RY
Features
• Industrial safety applications
• White goods applications
EL
I
Switch Type
Contact Form
C (SPDT-CO)
Materials
Body: Glass
Leads: Tin-plated Ni-Fe wire
Note: SPDT-CO = Single-Pole, Double-Throw, Change Over
Electrical Ratings
Contact Rating 1
W/VA - max.
30
Vdc - max.
Vac - max.
Vdc - min.
500
350
1200
Carry
Adc - max.
Aac - max.
Adc - max.
0.50
0.35
3.0
Resistance
Contact, Initial
Insulation
Ω - max.
Ω - min.
0.125
109
Capacitance
Contact
pF - typ.
2.0
Temperature
Operating
Storage 5
°C
°C
-20 to +125
-65 to +125
Voltage 3
PR
Current 3
Switching
2
Breakdown
Switching
4
2
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: 07/17/17
Specifications are subject to change without notice.
littelfuse.com
Axial Lead Reed Switches
High Power > DRS-DTH
DRS-DTH 39.7mm Standard Changeover Reed Switch
Product Characteristics
Operating Characteristics
1
4.5ms - max.
Release Time
1
7.0ms - max.
Shock
RY
Operate Time
11ms 1∕2 sine wave
2
Vibration
10G - max.
50-2000 Hertz
2
Resonant Frequency
15G - max.
Hz - typ.
2.75kHz - typ.
Magnetic Characteristics
Ampere Turns
3
Rating Sensitivity
50-80
A
Pull-In Range
Ampere Turns
4
Test Coil
60
L4988
IN
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.
70
60
50
40
Max.
EL
Drop-Out (L4988 Coil)
Part Numbering System
IM
Drop-Out vs. Pull-In Chart
30
20
PR
10
Min.
0
0
10
20
30
40
50
60
70
80
90
DRS-DTH-50-80
Series
AT Range
50-55 AT
50-60 AT
50-80 AT
55-60 AT
55-65 AT
65-70 AT
65-80 AT
70-75 AT
70-80 AT
75-80 AT
Example:
50-80 AT product is
DRS-DTH-50-80
Pull-In (L4988 Coil)
Note: Chart represents the range of Drop-Out, min to max for a given Pull-In value.
Note: These AT values are the before-modification values of the bare reed switch.
Packaging
Packaging Option
Packaging Specification
Bulk
© 2017 Littelfuse
Revised: 07/17/17
Specifications are subject to change without notice.
Bulk
Quantity
1000
Quantity & Packaging Code
N/A
Taping Width
N/A
littelfuse.com
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