L14G1 Phototransistor 880nm TO-206AA Equivalent & Substitute Parts

Part Overview

The L14G1 is an obsolete phototransistor manufactured by onsemi, designed for 880nm infrared detection in a TO-206AA metal can package. This component operates as a light-sensitive transistor with a 20° viewing angle and is rated for -65°C to 125°C operation. Due to its obsolete status, equivalent and substitute parts from active manufacturers are necessary for new designs and production continuity. Substitute phototransistors in this category maintain compatible mechanical packaging, electrical performance ranges, and thermal operating specifications while offering improved availability and compliance certifications.

Key Parameters

Parameter	L14G1 Specification
Manufacturer	onsemi
Wavelength	880nm
Package / Case	TO-206AA, TO-18-3 Metal Can
Mounting Type	Through Hole
Orientation	Top View
Voltage - Collector Emitter Breakdown (Max)	45 V
Current - Dark (Id) (Max)	100 nA
Power - Max	300 mW
Operating Temperature	-65°C ~ 125°C
Viewing Angle	20°
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute phototransistors for the L14G1 are selected based on the following critical parameters:

Mechanical Compatibility: All substitute parts maintain the TO-206AA, TO-18-3 metal can package with through-hole mounting and top-view orientation, ensuring direct mechanical interchangeability.

Wavelength Range: The L14G1 operates at 880nm. Substitute parts operate within the near-infrared spectrum (850nm to 890nm), maintaining functional compatibility for 880nm detection applications.

Electrical Performance: Substitute parts maintain dark current specifications at 100 nA maximum and support collector-emitter breakdown voltages of 30V to 70V, with collector current ratings of 50mA and power dissipation up to 250mW to 300mW.

Thermal Operating Range: All substitute parts support the full -65°C to 125°C operating temperature range required by the L14G1.

Compliance and Availability: Substitute parts are sourced from active manufacturers with RoHS3 compliance and REACH unaffected status, ensuring regulatory compliance and production continuity.

Parameter Comparison

Part Number	Manufacturer	Wavelength	Voltage - Collector Emitter Breakdown (Max)	Current - Dark (Id) (Max)	Power - Max	Operating Temperature	Viewing Angle	Product Status	Inventory (Pcs)
L14G1	onsemi	880nm	45 V	100 nA	300 mW	-65°C ~ 125°C	20°	Obsolete	2400
BPW77NB	Vishay Semiconductor Opto Division	850nm	70 V	100 nA	250 mW	-40°C ~ 125°C	20°	Active	21472
OP800A	TT Electronics / Optek Technology	890nm	30 V	100 nA	250 mW	-65°C ~ 125°C	—	Active	1329
OP800B	TT Electronics / Optek Technology	890nm	30 V	100 nA	250 mW	-65°C ~ 125°C	—	Active	868
OP800C	TT Electronics / Optek Technology	890nm	30 V	100 nA	250 mW	-65°C ~ 125°C	—	Active	831
OP804SL	TT Electronics / Optek Technology	890nm	30 V	100 nA	250 mW	-65°C ~ 125°C	—	Active	2713
OP804TX	TT Electronics / Optek Technology	890nm	30 V	100 nA	250 mW	-65°C ~ 125°C	24°	Active	764
OP804TXV	TT Electronics / Optek Technology	890nm	30 V	100 nA	250 mW	-65°C ~ 125°C	24°	Active	939
OP805SL	TT Electronics / Optek Technology	890nm	30 V	100 nA	250 mW	-65°C ~ 125°C	—	Active	1590
OP805TX	TT Electronics / Optek Technology	890nm	30 V	100 nA	250 mW	-65°C ~ 125°C	24°	Active	1054
OP805TXV	TT Electronics / Optek Technology	890nm	30 V	100 nA	250 mW	-65°C ~ 125°C	24°	Active	1375

Engineering Selection Recommendations

Primary Substitutes: The OP800 series (OP800A, OP800B, OP800C) and OP804/OP805 series from TT Electronics / Optek Technology provide direct functional equivalence to the L14G1. These parts maintain 890nm wavelength operation, identical dark current specifications, full -65°C to 125°C thermal range, and RoHS3 compliance with REACH unaffected status. The OP800 series offers the closest wavelength match at 890nm, differing only 10nm from the L14G1 specification.

Alternative Substitute: The BPW77NB from Vishay Semiconductor Opto Division operates at 850nm with higher collector-emitter breakdown voltage (70V versus 45V on the L14G1). This part is suitable for applications where extended voltage headroom is beneficial. However, the BPW77NB operating temperature range is limited to -40°C to 125°C, which does not support the full -65°C lower temperature specification of the L14G1.

Compliance Status: All substitute parts carry RoHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic component procurement.

Availability: TT Electronics / Optek Technology OP800/OP804/OP805 series parts demonstrate consistent inventory availability across multiple variants, with OP804SL offering the highest stock level at 2713 units.

Frequently Asked Questions (FAQ)

Q: Can the BPW77NB replace the L14G1 in all applications?

A: The BPW77NB is mechanically and electrically compatible for most applications. However, it operates at 850nm instead of 880nm and has a limited operating temperature range of -40°C to 125°C. Applications requiring the full -65°C lower temperature specification must use OP800 series alternatives.

Q: What is the difference between OP804TX and OP804TXV variants?

A: Both OP804TX and OP804TXV maintain identical electrical specifications and 24° viewing angle. The designation difference reflects manufacturer packaging or lead configuration variants. Both are mechanically compatible with the L14G1 TO-206AA package.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed carry RoHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic component procurement and assembly.

Q: Does the 890nm wavelength of OP800 series parts affect 880nm detection performance?

A: The 10nm wavelength difference between the L14G1 (880nm) and OP800 series (890nm) falls within the spectral sensitivity curve of near-infrared phototransistors. Both wavelengths operate in the same functional detection band for infrared applications.

Q: Which substitute part offers the best availability?

A: The OP804SL provides the highest inventory level at 2713 units, followed by OP805SL at 1590 units. Both maintain full electrical and thermal compatibility with the L14G1.

Q: Can I use substitute parts with different viewing angles?

A: Yes. The L14G1 specifies a 20° viewing angle. Substitute parts with 24° viewing angles (OP804TX, OP804TXV, OP805TX, OP805TXV) offer a wider field of view while maintaining all other electrical specifications. Parts without specified viewing angle data (OP800A, OP800B, OP800C, OP804SL, OP805SL) are also compatible.

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