L14N2 Phototransistor 880nm Equivalent & Substitute Parts

Part Overview

The L14N2 is an 880nm phototransistor manufactured by onsemi in a TO-206AA metal can package. This component is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. The L14N2 operates across an extended temperature range of -65°C to 125°C with a maximum collector-emitter breakdown voltage of 30V and dark current specification of 100nA maximum. Substitute phototransistors must maintain compatibility with the TO-206AA through-hole mounting configuration and preserve the optical sensitivity characteristics within the near-infrared spectrum.

Substiute Parts

L14N2

onsemiIn Stock: 1503L14N2 Datasheet

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BPW76A

Vishay Semiconductor Opto DivisionIn Stock: 2310BPW76A Datasheet

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BPW76B

Vishay Semiconductor Opto DivisionIn Stock: 2726BPW76B Datasheet

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OP800A

TT Electronics / Optek TechnologyIn Stock: 1398OP800A Datasheet

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OP800WSL

TT Electronics / Optek TechnologyIn Stock: 902OP800WSL Datasheet

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OP801WSL

TT Electronics/Optek TechnologyIn Stock: 1907OP801WSL Datasheet

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OP802WSL

TT Electronics/Optek TechnologyIn Stock: 12998OP802WSL Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the L14N2 is determined by the following critical parameters:

Package Compatibility: All substitute parts must use the TO-206AA, TO-18-3 metal can package with through-hole mounting and top-view orientation to ensure direct mechanical and electrical compatibility.

Optical Characteristics: Substitute phototransistors must operate within the near-infrared spectrum (850nm to 890nm wavelength range) to maintain functional equivalence in applications requiring 880nm sensitivity.

Electrical Ratings: Substitute parts must support a maximum collector-emitter breakdown voltage of at least 30V and maintain a dark current specification of 100nA maximum to preserve circuit performance and noise characteristics.

Thermal Range: Operating temperature range must encompass or exceed the L14N2 specification of -65°C to 125°C.

Regulatory Compliance: All substitute parts must maintain MSL 1 classification and REACH compliance status.

The following parts meet these substitution criteria: BPW76A, BPW76B, OP800A, OP800WSL, OP801WSL, and OP802WSL.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Closest Match): OP800A, OP800WSL, OP801WSL, and OP802WSL are direct functional equivalents. These parts maintain identical collector-emitter breakdown voltage (30V), dark current (100nA), and operating temperature range (-65°C to 125°C) as the L14N2. Wavelength specification at 890nm provides optimal compatibility for 880nm applications. All four parts carry active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment.

Secondary Substitutes (Extended Voltage Rating): BPW76A and BPW76B offer higher collector-emitter breakdown voltage (70V) and maintain identical dark current and viewing angle specifications. These Vishay components operate at 850nm wavelength, which falls within the acceptable near-infrared range for phototransistor applications. Both parts are active products with ROHS3 compliance. The lower operating temperature minimum (-40°C versus -65°C) may require evaluation for applications requiring extended cold-temperature performance.

Compliance Considerations: All substitute parts maintain MSL 1 classification and REACH compliance status consistent with the L14N2. The onsemi L14N2 product status is obsolete; all recommended substitutes carry active product status, ensuring continued manufacturing support and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can BPW76A or BPW76B be used as direct replacements for L14N2?

A: BPW76A and BPW76B are functionally compatible substitutes. Both maintain the TO-206AA package, through-hole mounting, and identical dark current specification (100nA). The 850nm wavelength differs from the L14N2's 880nm specification but remains within the near-infrared spectrum suitable for phototransistor applications. The higher breakdown voltage (70V) provides additional design margin. The minimum operating temperature of -40°C should be evaluated against application requirements, as the L14N2 supports -65°C operation.

Q: What is the difference between OP800A, OP800WSL, OP801WSL, and OP802WSL?

A: All four TT Electronics/Optek Technology parts share identical electrical specifications: 890nm wavelength, 30V breakdown voltage, 100nA dark current, and -65°C to 125°C operating range. These parts are functionally equivalent and interchangeable from an electrical and thermal perspective. Selection between these variants should be based on availability, packaging options, and specific application requirements.

Q: Are all substitute parts ROHS3 compliant?

A: All recommended substitute parts (BPW76A, BPW76B, OP800A, OP800WSL, OP801WSL, OP802WSL) carry ROHS3 compliance certification. The original L14N2 does not specify RoHS status. For applications requiring RoHS compliance, the substitute parts provide regulatory alignment.

Q: Does wavelength difference between 880nm and 850nm/890nm affect circuit performance?

A: Wavelength differences within the near-infrared spectrum (850nm to 890nm) represent variations in optical sensitivity peak response. Circuit performance depends on the specific application's light source wavelength and the phototransistor's spectral response curve. Applications using 880nm light sources will experience slightly different sensitivity with 850nm or 890nm phototransistors. Detailed spectral response data from manufacturer datasheets should be consulted for critical applications.

Q: Can I use these substitutes in new designs?

A: Yes. All recommended substitute parts carry active product status, ensuring manufacturing continuity and supply chain availability. The OP800 series (OP800A, OP800WSL, OP801WSL, OP802WSL) provides the closest electrical match to the obsolete L14N2. BPW76A and BPW76B offer alternative solutions with extended voltage ratings and active product support from Vishay.