OLH249

Radiation Tolerant Phototransistor Hermetic Optocoupler

The OLH249 is designed especially for high-reliability applications that require optical isolation in radiation environments, such as gamma, neutron, and proton radiation with high current transfer ratio (CTR) and low saturation VCE. Each optocoupler consists of an LED and N-P-N silicon phototransistor electrically isolated, but optically coupled inside a hermetic TO-5 package. Electrical parameters are similar to the JEDEC registered 4N49 optocoupler, but have much better CTR degradation characteristics due to radiation exposure. The OLH249 has 100 percent high-reliability screened parts available. Contact us for more details.

Product Documents

Data Sheets
OLH249 Data Sheet

Brochure
Optocouplers Selection Guide Brochure

Application Notes
Skyworks Optocouplers vs. Pulse Transformers

White Paper
Optocouplers for the Hybrid industry White Paper

White Paper
Proton Radiation Graph White Paper

White Paper
White Paper Discussion of RGA Test for Moisture Content for Isolink Optocouplers

Features

Radiation-tolerant version of 4N49
Current Transfer Ratio (CTR) guaranteed over –55 °C to
+100 °C ambient temperature range
1000 VDC electrical isolation
High CTR
Standard TO-5 hermetic package
High reliability screening available

Images & Diagrams

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Specifications

- Memo
- Condition
- CTR @ IF = 1 mA
- CTR Min.
- 200
- CTR Max.
- 1200
- BV_CEO (V)
- 40
- Vcc Max. (V)
- —
- Switching Time (μs)
- 25
- Isolation @ V_DC 1 Sec.
- 1000
- Package Photo
- Package Info
- 6-Lead Hermetic TO-5
- Radiation Tolerant
- Yes
- No Base Connection

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Green / Pb-Free Certificate
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