Littelfuse-FLEX-14-10-15

Reed Switches

Datasheet  

FLEX-14  

14mm Reed Switch  

RoHS  

Description  

The FLEX-14 reed switch is a sub-miniature, normally open switch  

with a 14.00mm long x 2.28mm diameter (0.551” x 0.090”) glass  

envelope, flexible, easily formed leads, capable of switching  

200Vdc at 10W. It has high insulation resistance of 1010 ohms  

minimum and low contact resistance of less than 100 milliohms.  

Features & Benefits  

■

Sub-miniature, normally  

open switch  

■

Soft leads enable reliable  

hand forming  

■

Longer leads are flexible for  

easy forming  

■

Zero operating power  

required for contact closure  

■

Capable of switching up to  

200Vdc or 0.5A at up to 10W  

■

Excellent for switching  

micro-controller logic level  

loads  

■

Available sensitivity range  

10-30 AT  

Additional Information  

■

Hermetically sealed switch  

contacts are not effected by  

and have no effect on their  

external environment  

Applications  

■

Reed relays  

Resources  

Accessories  

Samples  

■

Office equipment  

■

Industrial Control  

■

Security  

Agency Approvals  

■

Limit switching  

Agency  

Agency File Number  

E47258  

Ampere-

T

u

rns Range  

10-30 AT  

Switc

h

T

y

pe  

E471070  

Note:

Contact Littelfuse for specific agency approval ratings.  

Contact Form  

Materials  

A (SPS

T

–

NO)  

Body: Glass  

Dimensions  

Dimensions in mm  

Leads

:

T

in-plated Ni-Fe wire  

CL OF OVERL

A

P  

(.872) RE

F

.  

Note:

SPST-NO = Single-pole, single-throw, normally open  

22,15  

(.090) MAX.  

2,28  

(.0185) DIA. RE

F

.  

0,47  

(.583) M

I

N

.  

14,80  

(.551) MAX.  

14,00  

(1.744) NOM.  

44,30  

Electrical Ratings  

Contact Type  

Normally Open  

Contact Rating

1  

–

W/VA – max.  

Vdc – max.  

Vac – max.  

Vdc – min.  

Adc – max.  

Aac – max.  

Adc – max.  

10  

200  

140  

250  

0.50  

0.35  

1.00  

Switching

2  

Voltage

3  

Current

3  

Breakdown

4  

Switching

2  

Carry  

Ω – max.  

0.100  

Contact, Initial Insulation  

Resistance  

10

10  

Ω – min.  

Contact  

Operating  

Storage

5  

pF – typ.  

°C  

0.2  

Capacitance  

-40 to +125  

-65 to +125  

T

e

mperature  

Notes:  

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.  

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.  

© 2023 Littelfuse, Inc.  

Specifications are subject to change without notice.  

Revised: GD. 05/08/23  

1

Reed Switches

Datasheet  

FLEX-14  

14mm Reed Switch  

Product Characteristics  

Operating Characteristics  

Operate Time

1  

Release Time

1  

Shock

2  

0.55ms – max.  

0.20ms – max.  

100G – max.  

30G – max.  

–

–

11ms 1∕2 sine wave  

Vibration

2  

50-2000 Hertz  

Resonant Frequency  

5.2kHz – typ.  

–

Magnetic Characteristics  

Ampere Turns  

Ampere Turns  

–

Pull-In Range

3  

Rating Sensitivity

4  

Test Coil  

10-30  

20  

L4989  

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.  

Drop-Out vs. Pull-In Chart  

Part Numbering System  

FLEX-14-10-15  

25  

Max.  

20  

15  

Min.  

Series  

10  

AT Range  

10-15 AT  

Example:  

5

15-20 AT  

10-15 AT product is  

20-25 AT  

FLEX-14-10-15  

25-30 AT  

0

0

5

10  

15  

20  

25  

30  

35  

Pull-In (

A

T,

L

4989 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  

Quantity  

Quantity & Packaging Code  

T

a

pin

g

W

idth  

Bulk  

Bulk  

3000  

–

–

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:

© 2023 Littelfuse, Inc.  

Specifications are subject to change without notice.  

2

Revised: GD. 05/08/23