OPI110C - 10kV Optically Coupled Isolator, NPN Phototransistor | Optek / TT Electronics
N.º de pieza: OPI110C ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $2.47 | $2,47 |
| 10 | $2.21 | $22,10 |
| 100 | $1.95 | $195,00 |
| 500 | $1.74 | $870,00 |
| 1.000 | $1.58 | $1.580,00 |
OPI110C Descripción general
An optocoupler (also called an optoisolator) is a semiconductor device that transfers electrical signals between two isolated circuits using light. The infrared LED on the input side converts an electrical signal into infrared light, which crosses a transparent insulating barrier and is detected by a phototransistor on the output side. Because light is the only medium of coupling, galvanic isolation of thousands of volts is achieved while the data or control signal still passes through. The OPI110C belongs to the broader category of transistor-output optocouplers, which sit inside the hierarchy: optocoupler -> isolator -> optoelectronic component -> semiconductor device.
Key specifications of the OPI110C include a forward DC current of 40 mA maximum, peak forward current of 1 A (1 ms pulse), reverse voltage of 6 V, collector-emitter voltage of 30 V, and power dissipation of 100 mW. The 890 nm LED wavelength is matched to the silicon phototransistor spectral response, providing efficient optical coupling. The device operates over a temperature range suitable for industrial environments.
The axial package provides a 0.5 inch (12.7 mm) pitch, allowing standard PCB through-hole mounting or wiring into a custom insulating fixture. Compared to surface-mount optocouplers, the axial OPI110C is favored when maximum creepage distance and through-hole mechanical strength are required, especially in high-voltage or high-noise environments.
Typical applications include isolated signal interfacing in industrial PLCs, switch-mode power supply (SMPS) feedback loops, medical patient-monitoring equipment, high-voltage probe isolation, and ground-loop elimination in data acquisition systems. The 10 kV rating enables use where regulatory standards require reinforced or double insulation.
When designing with the OPI110C, observe the absolute maximum LED forward current of 40 mA continuous to prevent degradation. Add a series resistor to limit forward current, and consider CTR degradation over time when budgeting CTR for the end of life of the design.
This page synthesizes distributor pricing, verified parametric data, drop-in alternatives and practical design guidance drawn from the TT Electronics / Optek OPI110C datasheet and current distributor listings (DigiKey, Mouser, LCSC).
Alternativas directas para OPI110C — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
OPI110
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
OPI110B
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
OPI110D
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
OPI110A
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LTV-814
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
OPI110C Valores máximos y características eléctricas
| Isolation Voltage (Minimum) | 10000 VDC |
| Isolation Voltage (Distributor-Rated) | 15000 VDC |
| Tipo de salida | NPN Silicon Phototransistor |
| Number of Channels | 1 |
| LED Peak Wavelength | 890 nm |
| Forward DC Current (IF) Maximum | 40 mA |
| Forward Peak Current (1 ms pulse) | 1 A |
| Reverse Voltage (VR) Maximum | 6 V |
| Collector-Emitter Voltage (VCEO) Maximum | 30 V |
| Power Dissipation | 100 mW |
| Current Transfer Ratio (CTR) Minimum | 50% @ IF = 10 mA, VCE = 10 V |
| Encapsulado | Axial 4-Pin (0.5 inch / 12.7 mm pitch) |
| Tipo de montaje | Through-Hole |
| Estado RoHS | Compliant |
Configuración de pines de OPI110C
| Pin 1 | LED Anode — Infrared LED anode (input side) |
| Pin 2 | LED Cathode — Infrared LED cathode (input side) |
| Pin 3 | Emitter — NPN phototransistor emitter (output side) |
| Pin 4 | Collector — NPN phototransistor collector (output side) |
Aplicaciones típicas
OPI110C es adecuado para 7 aplicacións: Isolated SMPS Feedback Loop, Industrial PLC Signal Isolation, Medical Patient-Monitoring Isolation, High-Voltage Probe and Test Equipment, Ground-Loop Elimination in Data Acquisition, Power MOSFET Gate Drive Isolation, Telecom Line Interface Isolation.
Isolated SMPS Feedback Loop
The OPI110C is used in the primary-to-secondary isolation boundary of switch-mode power supplies, transferring the error-amplifier feedback signal across the 10 kVDC insulation barrier. Its 890 nm LED matches the silicon phototransistor response curve and its 30 V VCEO rating provides adequate headroom for typical TL431-style feedback circuits. Engineers select the OPI110C when the supply must meet reinforced-insulation regulatory creepage requirements. The axial 0.5-inch package provides long creepage distance that surface-mount optocouplers cannot match, making the part favored in industrial AC-DC converters up to 1 kW.
Recomendado
Industrial PLC Signal Isolation
Programmable logic controllers use transistor-output optocouplers such as the OPI110C to isolate 24 V field-side inputs from the low-voltage logic backplane. The 10 kVDC isolation rating exceeds the requirements of IEC 61131-2 industrial control standards, while the 40 mA continuous LED forward current handles the worst-case 24 V input current through a series resistor. The axial through-hole package is well suited to wiring-duct and terminal-block assemblies inside PLC cabinets where surface-mount parts would be impractical. Designers choose the OPI110C when reinforced insulation and high common-mode transient immunity are required.
Recomendado
Medical Patient-Monitoring Isolation
Patient-connected medical equipment such as ECG, EEG and pulse-oximetry monitors require reinforced galvanic isolation between the patient side and the operator side. The OPI110C's 10 kVDC rating supports the creepage and clearance requirements of IEC 60601-1 reinforced insulation for many equipment classes. The NPN phototransistor output interfaces directly with low-noise analog front-end amplifiers on the patient-isolated side. Engineers specify the OPI110C in the analog signal path where a digital isolator's switching noise would degrade measurement resolution.
Recomendado
High-Voltage Probe and Test Equipment
High-voltage oscilloscope probes, multimeter input stages and partial-discharge test fixtures use axial optocouplers such as the OPI110C to isolate measurement signals from the high-voltage node under test. The 10 kVDC isolation is sufficient for measurement of 4 kV RMS AC line-to-line circuits with appropriate safety margin. The axial 0.5-inch package allows hand-soldered assembly inside probe bodies where creepage is critical. Designers prefer the OPI110C over surface-mount optocouplers because the long axial leads provide the physical clearance needed for safe high-voltage probing.
Recomendado
Ground-Loop Elimination in Data Acquisition
In multi-channel data-acquisition front ends, ground loops between sensors at different potentials inject 50/60 Hz hum and common-mode noise into measurement signals. The OPI110C breaks the ground loop by isolating each analog input channel with 10 kVDC of galvanic isolation, while still passing the analog or digital signal through its phototransistor output. The 50% minimum CTR at 10 mA IF provides predictable gain for current-loop or voltage-signal isolation circuits. Engineers select the OPI110C for thermocouple, strain-gauge and process-control DAQ boards where ground potential differences exceed 50 V.
Recomendado
Power MOSFET Gate Drive Isolation
Half-bridge and full-bridge power converters require isolation between the low-voltage control logic and the high-side gate drive of the upper MOSFET or IGBT. The OPI110C provides the 10 kVDC isolation needed when the high-side switch is switching at 400 V or 800 V bus voltages. Its fast phototransistor response supports gate-drive switching frequencies up to several tens of kilohertz in IGBT gate-drive applications. Designers pair the OPI110C with a gate-driver IC such as the UCC27714 on the isolated secondary side to drive the high-side switch.
Recomendado
Telecom Line Interface Isolation
Telecom equipment such as DSL modems, ISDN terminal adapters and PBX line cards use axial optocouplers like the OPI110C to isolate the tip-and-ring line interface from the digital signal-processor side. The 10 kVDC isolation withstands the transient overvoltages specified by ITU-T K.20/K.21 on telecom lines. The NPN phototransistor output interfaces directly with DSP or codec circuits on the protected side. Engineers select the OPI110C for compliance with telecom surge and isolation standards.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para OPI110C — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | OPI110 | OPI110B | OPI110D | OPI110A | LTV-814 |
|---|---|---|---|---|---|---|
| Package | Axial 4-Pin (0.5 inch) | Axial 4-Pin (0.5 inch) | Axial 4-Pin (0.5 inch) | Axial 4-Pin (0.5 inch) | Axial 4-Pin (0.5 inch) | DIP-4 (different PCB footprint) |
| Brand | TT Electronics | TT Electronics | TT Electronics | TT Electronics | TT Electronics | LiteOn |
| Isolation Voltage (Minimum) | 10000 VDC | 10000 VDC | 10000 VDC | 10000 VDC | 10000 VDC | 5000 Vrms |
| Output Type | NPN Phototransistor | NPN Phototransistor | NPN Phototransistor | NPN Phototransistor | NPN Phototransistor | NPN Phototransistor (DIP-4) |
| LED Peak Wavelength | 890 nm | 890 nm | 890 nm | 890 nm | 890 nm | 940 nm |
| Forward DC Current Maximum | 40 mA | 40 mA | 40 mA | 40 mA | 40 mA | 50 mA |
| Collector-Emitter Voltage Maximum | 30 V | 30 V | 30 V | 30 V | 30 V | 35 V |
Diferenciadores clave
- 10 kVDC minimum isolation in axial through-hole package (frente a LTV-814)
- Family CTR grade selection with same axial footprint (frente a OPI110 (base part))
- Long axial 0.5-inch creepage distance (frente a DIP-4 surface-mount optocouplers)
Notas de diseño
Do not drive the OPI110C LED above 40 mA continuous forward current; the absolute maximum ratings in the TT Electronics / Optek datasheet call for derating above 25 C ambient. Use a series resistor sized for IF = 10 to 20 mA in normal operation to balance CTR against LED longevity. CTR degrades over operational life - budget at least 50 percent end-of-life CTR derating when sizing the input current.
Maintain maximum possible creepage distance between the LED-side pins (1, 2) and the phototransistor-side pins (3, 4) on the PCB. The axial 0.5-inch package is selected specifically for its long lead spacing, so avoid bending the leads close together. A slot or cutout in the PCB between the input and output sides further increases effective creepage per IEC 60664-1.
Estimated: at IF = 20 mA with Vf ~ 1.2 V, the LED dissipates approximately 24 mW; the phototransistor at IC = 5 mA and VCE = 10 V dissipates 50 mW, for total device dissipation well under the 100 mW absolute maximum. Operation above 70 C ambient requires additional derating; consult the manufacturer datasheet's thermal performance curve.
The phototransistor output stage has relatively slow switching (typically tens of microseconds) compared with digital isolators. For data rates above 100 kbps, use a high-speed logic-output optocoupler instead. The OPI110C is best suited for analog signal isolation, slow digital control, or DC feedback rather than high-speed data communication.
Información de cumplimiento
RoHS and REACH compliance per TT Electronics / Optek product page. Not AEC-Q100 qualified - this is a through-hole optocoupler, not an automotive-grade IC. Halogen-free status not explicitly stated in the verified data.
