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3C92C Optoisolator Equivalent & Substitute Parts
Part Overview
The 3C92C is an optoisolator with transistor output manufactured by TT Electronics/Optek Technology. This component provides 1000VDC isolation with a single channel configuration in a TO-72-4 metal can package. The device is actively produced and widely used in applications requiring galvanic isolation between input and output circuits. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, supply chain considerations, or design flexibility needs.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | 3C92C |
| Manufacturer | TT Electronics/Optek Technology |
| Category | Optoisolators |
| Number of Channels | 1 |
| Voltage - Isolation | 1000VDC |
| Current Transfer Ratio (Min) | 30% @ 10mA |
| Current Transfer Ratio (Max) | 200% @ 10mA |
| Turn On / Turn Off Time (Typ) | 9µs, 6µs (Max) |
| Output Type | Transistor |
| Voltage - Output (Max) | 50V |
| Current - Output / Channel | 30mA |
| Voltage - Forward (Vf) (Typ) | 1.2V (Max) |
| Current - DC Forward (If) (Max) | 50mA |
| Vce Saturation (Max) | 400mV |
| Operating Temperature | -55°C ~ 125°C |
| Package / Case | TO-206AF, TO-72-4 Metal Can |
| Mounting Type | Through Hole |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| REACH Status | REACH Unaffected |
| Product Status | Active |
Substitute Part Grouping Explanation
The 3C92C optoisolator has one identified parametric equivalent: the 3C91C. Substitution is valid based on the following criteria:
Key Parameters for Substitution Compatibility:
- Isolation voltage: 1000VDC (identical)
- Number of channels: 1 (identical)
- Current transfer ratio range: 30% to 200% @ 10mA (identical)
- Switching time characteristics: 9µs turn-on, 6µs turn-off maximum (identical)
- Output type: Transistor (identical)
- Maximum output voltage: 50V (identical)
- Maximum output current per channel: 30mA (identical)
- Input LED forward voltage: 1.2V maximum (identical)
- Maximum LED forward current: 50mA (identical)
- Output transistor saturation voltage: 400mV maximum (identical)
- Operating temperature range: -55°C to 125°C (identical)
- Package type: TO-72-4 metal can (identical)
- Mounting configuration: Through hole (identical)
Both parts share identical electrical specifications and mechanical packaging, making them fully interchangeable at the component level.
Parameter Comparison
| Parameter | 3C92C | 3C91C | Match |
|---|---|---|---|
| Manufacturer | TT Electronics/Optek Technology | TT Electronics/Optek Technology | Yes |
| Number of Channels | 1 | 1 | Yes |
| Voltage - Isolation | 1000VDC | 1000VDC | Yes |
| Current Transfer Ratio (Min) | 30% @ 10mA | 30% @ 10mA | Yes |
| Current Transfer Ratio (Max) | 200% @ 10mA | 200% @ 10mA | Yes |
| Turn On / Turn Off Time (Typ) | 9µs, 6µs (Max) | 9µs, 6µs (Max) | Yes |
| Output Type | Transistor | Transistor | Yes |
| Voltage - Output (Max) | 50V | 50V | Yes |
| Current - Output / Channel | 30mA | 30mA | Yes |
| Voltage - Forward (Vf) (Typ) | 1.2V (Max) | 1.2V (Max) | Yes |
| Current - DC Forward (If) (Max) | 50mA | 50mA | Yes |
| Vce Saturation (Max) | 400mV | 400mV | Yes |
| Operating Temperature | -55°C ~ 125°C | -55°C ~ 125°C | Yes |
| Package / Case | TO-206AF, TO-72-4 Metal Can | TO-206AF, TO-72-4 Metal Can | Yes |
| Mounting Type | Through Hole | Through Hole | Yes |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | Yes |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) | Yes |
| REACH Status | REACH Unaffected | REACH Unaffected | Yes |
| Product Status | Active | Active | Yes |
Engineering Selection Recommendations
Both the 3C92C and 3C91C are active products manufactured by TT Electronics/Optek Technology with identical electrical and mechanical specifications. Selection between these parts should be based on:
Compliance and Regulatory Status: Both parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component procurement.
Product Availability: The 3C92C has 1900 pieces in stock, while the 3C91C has 1526 pieces in stock. Component selection may be influenced by inventory availability and supply chain requirements.
Packaging and Mounting: Both parts use identical TO-72-4 metal can packaging with through-hole mounting configuration, ensuring direct mechanical and electrical compatibility in existing PCB designs without layout modifications.
Thermal and Electrical Performance: Both parts operate across the identical temperature range (-55°C to 125°C) and deliver identical isolation voltage, switching characteristics, and output specifications, ensuring equivalent performance in all operating conditions.
Frequently Asked Questions (FAQ)
Q: Can the 3C91C be used as a direct replacement for the 3C92C in existing designs?
A: Yes. The 3C91C is a parametric equivalent with identical electrical specifications, isolation voltage, switching times, output characteristics, and TO-72-4 package configuration. No circuit modifications or PCB layout changes are required.
Q: Are there any differences in isolation voltage between these parts?
A: No. Both the 3C92C and 3C91C provide 1000VDC isolation voltage with identical current transfer ratio ranges (30% to 200% @ 10mA).
Q: Do these parts have the same switching speed?
A: Yes. Both parts have identical turn-on time of 9µs and turn-off time of 6µs maximum, ensuring equivalent performance in high-speed switching applications.
Q: What is the maximum output current for each channel?
A: Both parts support a maximum output current of 30mA per channel with a maximum output voltage of 50V.
Q: Are both parts RoHS and REACH compliant?
A: Yes. Both the 3C92C and 3C91C are ROHS3 compliant and REACH unaffected, meeting current environmental regulations.
Q: What is the moisture sensitivity level for these optoisolators?
A: Both parts have a moisture sensitivity level (MSL) of 1, indicating unlimited shelf life without special moisture control requirements.
Q: Can these parts be used in through-hole PCB designs?
A: Yes. Both parts are configured for through-hole mounting in TO-72-4 metal can packages, compatible with standard PCB assembly processes.
Q: What is the operating temperature range for these components?
A: Both parts operate across the temperature range of -55°C to 125°C, suitable for industrial and commercial applications.
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