HIGH-SPEED, HIGH-CURRENT SURGE PROTECTORS

SPECIFICATIONS

551

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All characteristics at 25˚C

UMT(275)1.0

UMT(275)1.5

PARAMETER

CONDITIONS

SYMBOL

MIN

TYP

MAX

MIN

TYP

MAX

UNITS

Device Specifications

DC Breakdown

100V/s

V

BD

0.9

1.0

1.1

1.35

1.50

1.65

kV

Impulse Breakdown

5kV/

µsV

bd

-

-

1.25

-

-

1.88

kV

Insulation Resistance

100V

IR

--

--

Ω

Capacitance

1MHz

C

-

-

4

-

-

4

pF

Life Ratings

Surge Life

1kA (PW=20

µs)

-

500

-

-

500

-

-

surges

UMT(275)2.0

UMT(275)2.5

PARAMETER

CONDITIONS

SYMBOL

MIN

TYP

MAX

MIN

TYP

MAX

UNITS

Device Specifications

DC Breakdown

100V/s

V

BD

1.8

2.0

2.2

2.25

2.50

2.75

kV

Impulse Breakdown

5kV/

µsV

bd

-

-

2.5

-

-

3.13

kV

Insulation Resistance

100V

IR

--

--

Ω

Capacitance

1MHz

C

-

-

4

-

-

4

pF

Life Ratings

Surge Life

1kA (PW=20

µs)

-

500

-

-

500

-

-

surges

PMT/UMT (275) Series

MECHANICAL DIMENSIONS

ORDERING INFORMATION

DIMENSIONS

mm

(inches)

8.00

± 0.13 DIA.

(0.315

± 0.005)

1.93

± 0.13 DIA.

(0.076

± 0.005)

19.05

± 0.76

(0.750

± 0.030)

5.00

± 0.76 MAX.

(0.197

± 0.030)

4.75

± 0.76

(0.187

± 0.030)

Devices in the PMT/UMT(275) series with other breakdown voltages

in the 350-2500V range are available upon request.

A complete part number is represented by the digits below. Break-

down voltages are expressed in Volts for devices <1000V and kV for

devices

≥1kV. For example, PMT(275)350 is a 350V PMT(275) series

device, and UMT(275)2.0 is a 2kV UMT(275) series device.

PMT(275) XXX

UMT(275) XXX

UMT(275) X.X

for 350-500 V

for 550-850 V

for 1.0-2.5 kV

Series

PMT(275)

UMT(275)

Breakdown Voltage

See specification tables