MRPR-20-37-43 - LITTELFUSE

Speciﬁcations are subject to change without notice.

MRPR-20 20.3mm Miniature High Voltage and High Power Reed Switch

Description

The MRPR-20 Reed Switch is a miniature, normally open switch with a 20.32mm

long x 2.84mm diameter (0.800” x 0.112”) glass envelope, capable of high

voltage and power switching of 265Vac at 50VA. The MRPR-20 has high

insulation resistance of 1010 ohms minimum and contact resistance less than

100 milli-ohms.

Agency Approvals

Agency Agency File Number Ampere-Turns

Range

E47258 17-43 AT

Switch Type

Contact Form A (SPST-NO)

Materials Body: Glass

Leads: Tin-plated Ni-Fe wire

Axial Lead Reed Switches

Features

• Miniature normally open switch

• Capable of switching 265Vac or

1.5A at up to 50W/VA

• Minimum breakdown voltage

750Vdc

• Available sensitivity range

17-43 AT

Benefits

• Hermetically sealed switch

contacts are not affected by and

have no effect on their external

environment

• Zero operating power required

for contact

• High voltage and power switching

with a miniature switch

Applications

• Reed relays (suitable for switching

global mains voltage)

• Limit switching

• Telecom line switching

• Heavy Load Switching

Dimensions

Dimensions in mm (inch)

High Power > MRPR-20

RoHS

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

Electrical Ratings

Contact Rating 1W/VA - max. 50

Voltage 3

Switching 2

Breakdown 4

Vdc - max.

Vac - max.

Vdc - min.

250

265

750

Current 3

Switching 2

Carry

Adc - max.

Aac - max.

Adc - max.

1.5

1.1

3.0

Resistance Contact, Initial

Insulation

Ω - max.

Ω - min.

0.100

1010

Capacitance Contact pF - typ. 0.2

Temperature Operating

Storage 5

°C

-20 to +125

-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.

CL OF OVERLAP

28.32

(1.115) REF.

18.16

(.715) MAX.

20.32

(.800) MAX.

56.64

(2.230) NOM.

2.84

(.112) MAX.

0.63

(.025) DIA. REF.

Note: Contact Littelfuse for specific agency approval ratings.

Speciﬁcations are subject to change without notice.

Drop-Out vs. Pull-In Chart

Packaging

Packaging Option Packaging Specification Quantity Quantity & Packaging Code Taping Width

Bulk Bulk 1000 N/A N/A

Product Characteristics

Operating Characteristics

Operate Time 10.75ms - max.

Release Time 10.3ms - max.

Shock 211ms 1∕2 sine wave 100G - max.

Vibration 250-2000 Hertz 30G - max.

Resonant Frequency 2.1kHz - 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

High Power > MRPR-20

MRPR-20 20.3mm Miniature High Voltage and High Power Reed Switch

MRPR-20 - 17-28

Series

AT Range

17-43 AT

17-23 AT

17-28 AT

22-33 AT

27-33 AT

27-38 AT

32-38 AT

32-43 AT

37-43 AT

Example:

17-28 AT product is

MRPR-20-17-28

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 3Ampere Turns 17-43

Rating Sensitivity 4Ampere Turns 22

Test Coil L4989

0510 15 20 25

Pull-In (AT, L4989 Coil)

Drop-Out (AT, L4989 Coil)

30 35 40 45

Max.

Min.