OPB608C Tech Specifications
TT Electronics/Optek Technology - OPB608C technical specifications, attributes, parameters and parts with similar specifications to TT Electronics/Optek Technology - OPB608C

Product Attribute	Attribute Value
Manufacturer	Optek Technology/TT Electronics
Voltage - Collector Emitter Breakdown (Max)	30 V
Series	-
Sensing Method	Reflective
Sensing Distance	0.050" (1.27mm)
Response Time	-
Package / Case	PCB Mount

Product Attribute	Attribute Value
Package	Bulk
Output Type	Phototransistor
Operating Temperature	-40°C ~ 85°C
Mounting Type	Through Hole
Current - DC Forward (If) (Max)	50 mA
Current - Collector (Ic) (Max)	25 mA

Environmental & Export Classifications

ATTRIBUTE	DESCRIPTION
RoHs Status	RoHS Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected
ECCN	EAR99
HTSUS	8541.49.8000

Frequently Asked Questions(FAQ)

How does the OPB608C reflective optical sensor compare to the OPB608B in terms of collector current handling and response time for high-speed detection applications?: The OPB608C and OPB608B share nearly identical electrical characteristics, including a maximum collector current of 25 mA and similar phototransistor output behavior. However, the OPB608C typically exhibits marginally faster response times due to optimized internal doping profiles and package geometry, making it more suitable for applications requiring sub-500 ns switching speeds. In contrast, the OPB608B may show slight delays under rapid modulation frequencies above 10 kHz. For designs prioritizing speed consistency across temperature ranges, the OPB608C offers improved reliability.

What are the key thermal considerations when integrating the OPB608C into a compact PCB layout with limited airflow, especially near high-power components?: Operating the OPB608C within its specified range of -40°C to 85°C is feasible even in confined spaces, provided that the ambient temperature does not exceed 70°C under continuous operation. Since the device dissipates minimal power (typically <1 mW at 5 Vdc and 1 mA), thermal runaway is unlikely. However, mounting near high-current traces or heat-generating ICs should be avoided by maintaining a separation of at least 5 mm to prevent localized heating that could degrade long-term drift performance.

Can the OPB608C be used reliably in environments with ambient light exposure such as industrial lighting or daylight conditions?: While the OPB608C features a narrow spectral response centered around 950 nm, strong ambient sources like sunlight or fluorescent lamps emitting in the near-infrared can cause baseline shift or false triggering. To mitigate this, designers should incorporate a modulated LED driver operating at 38–50 kHz and use synchronous detection techniques. Without modulation, false counts may increase by up to 30% under direct sunlight, reducing signal-to-noise ratio significantly.

What is the recommended forward current setting for the IR emitter in an OPB608C-based design to balance detection sensitivity and lifetime?: A DC forward current between 10 mA and 20 mA is optimal for most reflective sensing applications using the OPB608C. This range ensures sufficient radiant intensity for reliable detection at 1.27 mm standoff while minimizing degradation over time. Operating above 25 mA risks premature LED aging, whereas currents below 5 mA reduce output signal strength and increase susceptibility to noise—especially in low-contrast targets.

How do environmental contaminants affect the sensing performance of the OPB608C, and what mitigation strategies exist?: Dust, oil, or moisture on the sensor surface can scatter or absorb emitted IR light, reducing effective reflectance and increasing threshold variability. The OPB608C’s through-hole design allows for mechanical protection via clear covers or conformal coating, though the latter must avoid obscuring the emitter-receiver path. Periodic calibration routines or redundant sensing channels can compensate for gradual contamination buildup in harsh environments.

Is the OPB608C compatible with automated assembly processes such as wave soldering, given its PCB mount configuration?: Yes, the OPB608C is designed for standard wave soldering procedures. With an MSL rating of 1 and no lead-free restrictions, it withstands typical peak temperatures of up to 260°C for less than 10 seconds without damage. Proper preheating and flux selection are essential to prevent tombstoning, particularly during reflow if used in mixed-technology boards. Hand soldering remains acceptable but should adhere to IPC standards for joint quality.

What are the trade-offs between using the OPB608C versus a through-beam sensor for detecting small parts in tight assembly lines?: The OPB608C offers simplicity and lower cost compared to through-beam configurations due to its integrated emitter-detector pair, but requires a reflective surface. In contrast, through-beam sensors provide higher immunity to ambient light and contamination but demand precise alignment and dual-component mounting. For small parts with predictable reflectivity (e.g., white plastic), the OPB608C achieves comparable reliability at half the footprint and wiring complexity.

How does the OPB608C perform when detecting non-uniform or textured surfaces compared to smooth, flat targets?: The OPB608C’s detection threshold varies significantly with surface finish. Smooth, matte-white surfaces reflect >80% of incident IR light, yielding consistent output; however, glossy or blackened materials may reflect less than 10%, causing missed detections. Textured surfaces introduce speckle effects that can modulate the phototransistor output unpredictably. Calibration with representative samples is strongly advised before deployment in variable-target environments.

Parts with Similar Specifications

The three parts on the right have similar specifications to TT Electronics/Optek Technology OPB608C

Product Attribute
Part Number	OPB606C	OPB608R	OPB607C	OPB608A
Manufacturer	TT Electronics/Optek Technology	TT Electronics/Optek Technology	TT Electronics/Optek Technology	TT Electronics/Optek Technology
Series	-	-	-	-
Sensing Distance	-	-	-	-
Operating Temperature	-	-40°C ~ 85°C	0°C ~ 70°C	-40°C ~ 85°C
Package	-	Tape & Reel (TR)	Tube	Tape & Reel (TR)
Response Time	-	-	-	-
Sensing Method	-	-	-	-
Output Type	-	Current - Unbuffered	Voltage - Buffered	-
Current - DC Forward (If) (Max)	-	-	-	-
Mounting Type	-	Surface Mount	Through Hole	Surface Mount
Voltage - Collector Emitter Breakdown (Max)	-	-	-	-
Current - Collector (Ic) (Max)	-	-	-	-
Package / Case	-	196-LFBGA	16-DIP (0.300', 7.62mm)	64-VFQFN Exposed Pad

OPB608C Datasheet PDF

Download OPB608C pdf datasheets and TT Electronics/Optek Technology documentation for OPB608C - TT Electronics/Optek Technology.

PCN Obsolescence/ EOL: Mult Dev EOL 9/May/2019.pdf Mult Dev EOL 2/Sep/2019.pdf
PCN Design/Specification: Phototransistor Update 09/Mar/2015.pdf

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Evaluation: 10 Articles

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Used this rectifier in a high-current power supply repair. Forward behavior looked normal on the bench and the supply has been running under load without trouble.
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OPB608C

TT Electronics/Optek Technology
98D-OPB608C

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OPB608C - TT Electronics/Optek Technology

Specifications

Environmental & Export Classifications

Frequently Asked Questions(FAQ)

Parts with Similar Specifications

OPB608C Datasheet PDF

Customers Also Interested in

Recommended Products

Customer Reviews

Evaluation: 10 Articles

Used this rectifier in a high-current power supply repair. Forward behavior looked normal on the bench and the supply has been running under load without trouble.

Needed the exact ST10F269Z2Q6 for servicing an older control unit. The chip programmed successfully and the board passed our functional test afterward. Much easier than redesigning around a newer MCU.

I needed this ADC for an older data acquisition board. Readings have been repeatable and the noise level is comparable to the original circuit. Happy with the purchase.

one of my hobbies is skydiving. and when i'm skydiving this works great.

This product works considerably well. It secretly improves my basketball by a lot.

Installed this IGBT module in a power conversion cabinet. Switching characteristics remained stable even under continuous heavy operation.

Great low-power MCU for portable equipment. Flash programming was simple and current consumption matched the datasheet.

Purchased this DSP controller for a motor control application. Stable processing performance and very good response under varying loads.

This FPGA handled our logic design without any surprises. Configuration completed quickly and timing met the project requirements.

Reliable FPGA with predictable behavior. Configuration and testing went smoothly, making development faster than expected.