OP296C Infrared Emitter 890nm 150mA T 1 3/4 Equivalent & Substitute Parts

Part Overview

The OP296C is an infrared (IR) emitter manufactured by TT Electronics / Optek Technology, designed for applications requiring 890nm wavelength emission at 150mA forward current. This component operates at 2V forward voltage with a 20° viewing angle in a T 1 3/4 through-hole package. The OP296C is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Substitute parts are selected based on matching or compatible electrical characteristics, mechanical form factors, and compliance certifications.

Key Parameters

Parameter	OP296C Specification
Wavelength	890nm
Forward Current (If Max)	150mA
Forward Voltage (Vf Typ)	2V
Viewing Angle	20°
Package / Case	T 1 3/4
Mounting Type	Through Hole
Operating Temperature Range	-40°C ~ 100°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution logic for the OP296C is based on the following allowed parameters: wavelength (890nm or near-infrared alternatives), forward current capability (150mA or lower), forward voltage compatibility (2V or lower), viewing angle (20°), package form factor (T 1 3/4 or radial equivalent), and through-hole mounting. Substitute parts are grouped into two categories:

Category 1: Direct Wavelength Match (890nm) Parts with 890nm wavelength maintain spectral compatibility with the original OP296C design. These include OP296B (same manufacturer, active status), LTE-4238 (Lite-On, 880nm near-match), QED123 (onsemi, 880nm near-match), XTHI12BF and XTHI12W (SunLED, 880nm near-match).

Category 2: Alternative Wavelength (940nm) Parts with 940nm wavelength provide functional substitution for applications where near-infrared spectrum flexibility exists. These include LTE-4208 (Lite-On), XTNI12BF and XTNI12W (SunLED).

All substitute parts maintain ROHS3 compliance, MSL 1 rating, and through-hole mounting compatibility. Forward current ratings range from 50mA to 100mA, requiring circuit design verification for applications originally specified at 150mA.

Parameter Comparison

Part Number	Manufacturer	Wavelength	If Max (mA)	Vf Typ (V)	Viewing Angle	Package	Operating Temp	Product Status
OP296C	TT Electronics / Optek	890nm	150	2	20°	T 1 3/4	-40°C ~ 100°C	Obsolete
OP296B	TT Electronics / Optek	890nm	150	2	20°	T 1 3/4	-40°C ~ 100°C	Active
LTE-4208	Lite-On Inc.	940nm	50	1.2	20°	T 1 3/4	-40°C ~ 85°C	Active
LTE-4238	Lite-On Inc.	880nm	100	1.3	20°	Radial	-40°C ~ 85°C	Active
QED123	onsemi	880nm	100	1.7	18°	Radial, 5mm	-40°C ~ 100°C	Active
XTHI12BF	SunLED	880nm	50	1.3	20°	Radial	-40°C ~ 85°C	Active
XTHI12W	SunLED	880nm	50	1.3	20°	Radial	-40°C ~ 85°C	Active
XTNI12BF	SunLED	940nm	50	1.2	20°	Radial	-40°C ~ 85°C	Active
XTNI12W	SunLED	940nm	50	1.2	20°	Radial	-40°C ~ 85°C	Active

Engineering Selection Recommendations

Primary Recommendation: OP296B The OP296B is the direct successor to the OP296C, manufactured by the same supplier (TT Electronics / Optek Technology). It maintains identical electrical specifications (890nm, 150mA, 2V, 20°) and package form factor (T 1 3/4). The OP296B is in active production status with ROHS3 compliance and MSL 1 rating. This part requires no circuit redesign and provides the highest compatibility for direct replacement applications.

Secondary Recommendations for Current-Limited Applications: For applications where forward current can be reduced below 150mA, the following active parts provide near-wavelength alternatives with full compliance certifications:

LTE-4238 (Lite-On, 880nm, 100mA) and QED123 (onsemi, 880nm, 100mA) operate at reduced current with wavelengths within the near-infrared spectrum. Both maintain ROHS3 compliance and extended operating temperature ranges. Package form factors differ (radial vs. T 1 3/4), requiring mechanical redesign.

Alternative Wavelength Options: LTE-4208, XTNI12BF, and XTNI12W provide 940nm wavelength operation at 50mA. These parts are suitable for applications where spectral flexibility to longer wavelengths is acceptable. All maintain ROHS3 compliance and active production status.

Compliance Verification: All substitute parts listed maintain ROHS3 compliance, REACH unaffected status, and EAR99 ECCN classification, matching the regulatory profile of the OP296C.

Frequently Asked Questions (FAQ)

Q: Can OP296B directly replace OP296C without circuit modification? A: Yes. The OP296B is electrically and mechanically identical to the OP296C (890nm, 150mA, 2V, 20°, T 1 3/4 package). No circuit redesign is required. The primary difference is product status: OP296B is active while OP296C is obsolete.

Q: What is the impact of using a 50mA part instead of 150mA? A: Parts rated for 50mA (LTE-4208, XTNI12BF, XTNI12W) require circuit current-limiting redesign. Forward current must be reduced through resistor or active current-limiting modifications. Radiant intensity output will be proportionally lower at reduced current levels.

Q: Are radial package parts compatible with T 1 3/4 through-hole designs? A: Radial packages (LTE-4238, QED123, XTHI12BF, XTHI12W, XTNI12BF, XTNI12W) have different mechanical form factors than T 1 3/4 axial packages. PCB footprint redesign is required. Both are through-hole mounting types but occupy different board space.

Q: What wavelength difference exists between 880nm and 890nm parts? A: The 10nm difference between 880nm and 890nm falls within the near-infrared spectrum. LTE-4238, QED123, XTHI12BF, and XTHI12W operate at 880nm versus the OP296C's 890nm. Application compatibility depends on receiver spectral sensitivity specifications.

Q: Which substitute part has the longest operating temperature range? A: Both OP296B and QED123 support -40°C to 100°C operating range, matching the OP296C specification. LTE-4208, LTE-4238, XTHI12BF, XTHI12W, XTNI12BF, and XTNI12W are limited to -40°C to 85°C.

Q: Are all substitute parts RoHS compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL 1 (unlimited) moisture sensitivity rating, matching the OP296C regulatory profile.

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