Hi-Reliability Optically Coupled Isolator

3C91C, 3C92C (TX), 3N243, 3N244, 3N245

(TX), 3N262

© TT electronics plc

General Note

TT Electronics reserves the right to make changes in product specification without

notice or liability. All information is subject to TT Electronics’ own data and is

considered accurate at time of going to print.

TT Electronics | OPTEK Technology

2900 E. Plano Pkwy, Plano, TX 75074 | Ph: +1 972 323 2200

www.ttelectronics.com | sensors@ttelectronics.com

Rev B 02/2020 Page 1

Description:

Each device is a high reliability optically coupled isolator that consists of an infrared emitting diode and a NPN silicon

phototransistor which are mounted in a hermetically sealed TO-72 package. The 3C91C and 3C92C have a 935 nm

wavelength, whereas the 3N243, 3N244, 3N245 and 3N262 have an 880 nm wavelength. All devices have 0.50” (12.70 mm)

leads. Electrical characteristics vary.

TX devices are processed to OPTEK’s military screening program patterned after MIL-PRF-19500.

Please refer to Application Bulletins 208 and 210 for additional design information and reliability (degradation) data.

Contact your local representative or OPTEK for more information.

Applications:

•

High-voltage isolation

between input and

output

•

Electrical isolation in

dirty environments

•

Industrial equipment

•

Medical equipment

•

Office equipment

Features:

•

TO-72 hermetically sealed package

•

1 kVDC electrical isolation

•

High current transfer ratio

•

TX devices processed to MIL-PRF-19500

4

2

3

1

3C91

4

3

2

1

3C92

4

3

1

2

3N2XX

Phototransistor Collector is connected to the Header-Base-Case for ALL versions

DIMENSIONS ARE IN:

INCHES

[ MILLIMETERS ]

Pin #

3C91

3C92

3N2XX

1

Cathode

Cathode

Emitter

2

Collector

Emitter

Cathode

3

Emitter

Collector

Collector

4

Anode

Anode

Anode

Part

Number

LED

Peak

Wavelength

Sensor

Isolation

Voltage

(,000)

CTR

Min / Max

IF (mA)

Typ / Max

VCE (V)

Typ /

Max

Lead

Length

3C91C

935 nm

Transistor

1

0.3 / 2.0

10 / 50

10 / 50

0.50"

3C92C (TX)

3N243

880 nm

0.15 / NA

3 / 40

10 / 30

3N244

0.3 / NA

3N245 (TX)

0.6 / NA

3N262

1.0 / 5.0

1 / 40

5 / 30