Maida Development Company - sales@maida.com - (757) 723-0785

STANDARD MARKING

Minimum marking shall consist of an

abbreviated style designation and, when

space is available, the manufacturer’s

initials or company logo.

Example:

MDC

14N201

Where:

MDC - Company Initials

FV - F

ail safe Varistor

14 - Diameter

N - Series Designation (FN

, FM, FE)

201 - Nominal DC Voltage Rating

(200VDC)

A manufacturing date code and/or

special markings are available upon

request.

Other safety agency designations are

included where applicable.

THERMALLY PROTECTED SERIES

INTRODUCTION

14 FN 201 K

1. Nominal Disk Diameter

14 – 14mm

20 – 20mm

25 – 25mm

2. Lead Configuration

FN – 2 leaded

FM – 3 leaded, fused on center lead

FE – 3 leaded, fused on outer lea d

3. AC Voltage Rating

Two significant figures plus nu mber

of zeroes that follow, i.e. 201 is 200 VDC

4. Varistor Voltage Range Tolerance

The Thermally Protected Series is designed for safe

disconnection of the varistor from the circuit due to

abnormal operating conditions. These components

consist of 2 or 3 leaded wire leads, a thermal

disconnect, and have nominal diameters of 14mm,

20mm, and 25mm. Voltage ranges from 60VAC-

750VAC with peak surge currents of 4.5kA/6kA

(14mm), 10kA (20mm), and 18kA (25mm).

STYLE DESIGNATION

The Maida Style Number is the typical means to

identify our components when ordered. The style

number identifies several parameters that are

important for the characteristics of the device. An

alternative ordering method, if known, is by our Item

Number.

The following example is the standard part

numbering system when ordering our Thermally

Protected Series components by the Maida Style

Number:

Typical

Maida Nominal Minimum Cap.

Style Size Marking

Number 10 x 1000 8 x 20 1 V rms

sec

1 2 Vmin Vmax @1kHz

A B C D E F (mm) (AC) (DC) (J) (J) (A) (A) (V) (V) (V) (A) (pF)

14FE820K X 14

MDC-FV-14E820K

50 65 27 27 4500 2500 74 90 135 50 2400

14FM820K X 14

MDC-FV-14M820K

50 65 27 27 4500 2500 74 90 135 50 2400

14FN820K X 14

MDC-FV-14N820K

50 65 27 27 4500 2500 74 90 135 50 2400

20FE820K X 20

MDC-FV-20E820K

50 65 56 56 10000 6500 74 90 135 100 4900

20FM820K X 20

MDC-FV-20M820K

50 65 56 56 10000 6500 74 90 135 100 4900

20FN820K X 20

MDC-FV-20N820K

50 65 56 56 10000 6500 74 90 135 100 4900

14FE101K X 14

MDC-FV-14E101K

60 85 33 33 4500 2500 90 110 165 50 2000

14FM101K X 14

MDC-FV-14M101K

60 85 33 33 4500 2500 90 110 165 50 2000

14FN101K X 14

MDC-FV-14N101K

60 85 33 33 4500 2500 90 110 165 50 2000

20FE101K X 20

MDC-FV-20E101K

60 85 70 70 10000 6500 90 110 165 100 4000

20FM101K X 20

MDC-FV-20M101K

60 85 70 70 10000 6500 90 110 165 100 4000

20FN101K X 20

MDC-FV-20N101K

60 85 70 70 10000 6500 90 110 165 100 4000

14FE121K X 14

MDC-FV-14E121K

75 100 40 40 4500 2500 108 132 200 50 1700

14FM121K X 14

MDC-FV-14M121K

75 100 40 40 4500 2500 108 132 200 50 1700

14FN121K X 14

MDC-FV-14N121K

75 100 40 40 4500 2500 108 132 200 50 1700

20FE121K X 20

MDC-FV-20E121K

75 100 85 85 10000 6500 108 132 200 100 3300

20FM121K X 20

MDC-FV-20M121K

75 100 85 85 10000 6500 108 132 200 100 3300

20FN121K X 20

MDC-FV-20N121K

75 100 85 85 10000 6500 108 132 200 100 3300

14FE151K X 14

MDC-FV-14E151K

95 125 50 50 6000 4500 135 165 250 50 1300

14FM151K X 14

MDC-FV-14M151K

95 125 50 50 6000 4500 135 165 250 50 1300

14FN151K X 14

MDC-FV-14N151K

95 125 50 50 6000 4500 135 165 250 50 1300

20FE151K X 20

MDC-FV-20E151K

95 125 100 100 10000 6000 135 165 250 100 2700

20FM151K X 20

MDC-FV-20M151K

95 125 100 100 10000 6000 135 165 250 100 2700

20FN151K X 20

MDC-FV-20N151K

95 125 100 100 10000 6000 135 165 250 100 2700

25FE151K X 25

MDC-FV-25E151K

95 125 160 160 15000 12000 135 165 250 150 4300

25FM151K X 25

MDC-FV-25M151K

95 125 160 160 15000 12000 135 165 250 150 4300

25FN151K X 25

MDC-FV-25N151K

95 125 160 160 15000 12000 135 165 250 150 4300

14FE181K X 14

MDC-FV-14E181K

115 150 58 58 6000 4500 162 198 300 50 1100

14FM181K X 14

MDC-FV-14M181K

115 150 58 58 6000 4500 162 198 300 50 1100

14FN181K X 14

MDC-FV-14N181K

115 150 58 58 6000 4500 162 198 300 50 1100

20FE181K X 20

MDC-FV-20E181K

115 150 110 110 10000 6000 162 198 300 100 2200

20FM181K X 20

MDC-FV-20M181K

115 150 110 110 10000 6000 162 198 300 100 2200

20FN181K X 20

MDC-FV-20N181K

115 150 110 110 10000 6000 162 198 300 100 2200

25FE181K X 25

MDC-FV-25E181K

115 150 175 175 15000 12000 162 198 300 150 3500

25FM181K X 25

MDC-FV-25M181K

115 150 175 175 15000 12000 162 198 300 150 3500

25FN181K X 25

MDC-FV-25N181K

115 150 175 175 15000 12000 162 198 300 150 3500

14FE201K X 14

MDC-FV-14E201K

130 170 70 70 6000 4500 185 225 340 50 1000

14FM201K X 14

MDC-FV-14M201K

130 170 70 70 6000 4500 185 225 340 50 1000

14FN201K X 14

MDC-FV-14N201K

130 170 70 70 6000 4500 185 225 340 50 1000

20FE201K X 20

MDC-FV-20E201K

130 170 140 140 10000 6000 185 225 340 100 2000

20FM201K X 20

MDC-FV-20M201K

130 170 140 140 10000 6000 185 225 340 100 2000

20FN201K X 20

MDC-FV-20N201K

130 170 140 140 10000 6000 185 225 340 100 2000

25FE201K X 25

MDC-FV-25E201K

130 170 210 210 15000 12000 185 225 340 150 3200

25FM201K X 25

MDC-FV-25M201K

130 170 210 210 15000 12000 185 225 340 150 3200

25FN201K X 25

MDC-FV-25N201K

130 170 210 210 15000 12000 185 225 340 150 3200

14FE221K X 14

MDC-FV-14E221K

140 180 78 78 6000 4500 198 242 360 50 900

14FM221K X 14

MDC-FV-14M221K

140 180 78 78 6000 4500 198 242 360 50 900

14FN221K X 14

MDC-FV-14N221K

140 180 78 78 6000 4500 198 242 360 50 900

20FE221K X 20

MDC-FV-20E221K

140 180 155 155 10000 6000 198 242 360 100 1800

20FM221K X 20

MDC-FV-20M221K

140 180 155 155 10000 6000 198 242 360 100 1800

20FN221K X 20

MDC-FV-20N221K

140 180 155 155 10000 6000 198 242 360 100 1800

25FE221K X 25

MDC-FV-25E221K

140 180 230 230 15000 12000 198 242 360 150 2900

25FM221K X 25

MDC-FV-25M221K

140 180 230 230 15000 12000 198 242 360 150 2900

25FN221K X 25

MDC-FV-25N221K

140 180 230 230 15000 12000 198 242 360 150 2900

NOTES:

Appendix A lists the single-pulse peak current and energy ratings on file with the Safety Agencies.

Maximum transient rating specified in this table are valid. They may differ from those shown in Appendix A.

A = UL1449 D = VDE

B = cUL E =

C = CSA F =

Continuous Transient

Varistor ClampingPeak

50VAC thru 140VAC VARISTORS

Recognitions

Energy

8 x 20

sec

Maximum Ratings Electrical Characteristics

Max

Voltage

Agency # Pulses

Safety @1 mA DC (@Test Current)

THERMALLY PROTECTED SERIES

SPECIFICATIONS

VoltageVoltage To CurrentApplied

Standards

(

8 x 20

sec

)