Datasheet
littelfuse.com© 2015 Littelfuse Revised: 12/16/15
Specifications are subject to change without notice.
Drop-Out vs. Pull-In Chart
Packaging
Packaging Option Packaging Specification Quantity Quantity and Packaging Code Taping Width
Bulk Bulk 1000 N/A N/A
Product Characteristics
Operating Characteristics
Operate Time
1
0.7ms - max.
Release Time
1
1ms - max.
Shock
2
11ms 1∕2 sine wave 50G - max.
Vibration
2
50-2000 Hertz 30G - max.
Resonant Frequency 11.0kHz - typ.
Part Numbering System
Notes:
1. Operate (including bounce)/Release Time - per EIA/NARM RS-421-A,diode suppressed coil (Coil II).
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.
Axial Lead Reed Switches
Low Power > MDRR-DT
MDRR-DT 14.7mm Miniature Changeover Reed Switch
MDRR-DT -15-20 F
Series
AT Range
10-15 AT
10-20 AT
15-20 AT
15-25 AT
15-30 AT
20-25 AT
20-30 AT
20-35 AT
25-30 AT
Version
F = FORMED
U = UNFORMED
Example:
15-20 AT product is
MDRR-DT-15-20-F or
MDRR-DT-15-20-U
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.
Magnetic Characteristics
Pull-In Range
3
Ampere Turns 10-30
Rating Sensitivity
4
Ampere Turns 20
Test Coil L4989
5
0
10
15
20
25
50
Pull-In (AT, L4989 Coil)
Drop-Out (AT, L4989 Coil)
10 15 20 25 30
35
Max.
Min.