SDP8314-301 Equivalent & Substitute Parts

Part Overview

The SDP8314-301 is a 935nm optical photo detector with logic output and open collector configuration, manufactured by Honeywell Sensing and Productivity Solutions. This component features a radial 3-lead side view package and operates across the industrial temperature range of -40°C to 85°C. The product is classified as obsolete, necessitating identification of active equivalent alternatives for ongoing design support and procurement requirements. Substitute parts must maintain functional compatibility through matching wavelength, output type, operating temperature range, and compliance certifications.

Key Parameters

Parameter	SDP8314-301 Specification
Manufacturer	Honeywell Sensing and Productivity Solutions
Wavelength	935nm
Type	Photo Detector, Logic Output
Output Type	Open Collector
Package / Case	Radial, 3 Lead, Side View
Operating Temperature	-40°C ~ 85°C (TA)
RoHS Status	RoHS Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the SDP8314-301 is determined by the following critical parameters:

Primary Matching Criteria:

Wavelength: 935nm (exact match required)
Type: Photo Detector, Logic Output (functional category)
Operating Temperature Range: -40°C ~ 85°C (minimum requirement)
Output Type: Open Collector (electrical interface specification)

Secondary Compatibility Factors:

RoHS and REACH compliance status
Moisture Sensitivity Level (MSL)
Package configuration (side view orientation)

Substitute parts are grouped into two categories based on output type compatibility:

Category A - Open Collector Output (Direct Functional Equivalents): Parts with open collector output type provide direct electrical interface compatibility with the SDP8314-301. These include OPL550-OCA, OPL551-OCA, and OPL561-OC.

Category B - Alternative Output Types (Functional Alternatives): Parts with push-pull or NPN output types (OPL530, OPL550, OPL550A, OPL551, OPL560, OPL561) maintain wavelength, temperature range, and compliance specifications but require circuit-level interface adaptation.

Parameter Comparison

Part Number	Manufacturer	Wavelength	Output Type	Package / Case	Operating Temperature	RoHS Status	Product Status
SDP8314-301	Honeywell	935nm	Open Collector	Radial, 3 Lead, Side View	-40°C ~ 85°C	RoHS Compliant	Obsolete
OPL530	TT Electronics / Optek Technology	935nm	NPN	3-SIP, Side View	-40°C ~ 85°C	ROHS3 Compliant	Active
OPL550	TT Electronics / Optek Technology	935nm	Push-Pull	Side View	-40°C ~ 85°C	ROHS3 Compliant	Active
OPL550-OCA	TT Electronics / Optek Technology	935nm	Open Collector	Side View	-40°C ~ 85°C	ROHS3 Compliant	Active
OPL550A	TT Electronics / Optek Technology	935nm	Push-Pull	Side View	-40°C ~ 85°C	ROHS3 Compliant	Active
OPL551	TT Electronics / Optek Technology	935nm	Push-Pull	Side View	-40°C ~ 85°C	ROHS3 Compliant	Active
OPL551-OC	TT Electronics / Optek Technology	935nm	Open Collector Inverter	Side View	-40°C ~ 85°C	ROHS3 Compliant	Active
OPL551-OCA	TT Electronics / Optek Technology	935nm	Open Collector Inverter	Side View	-40°C ~ 85°C	ROHS3 Compliant	Active
OPL560	TT Electronics / Optek Technology	935nm	Push-Pull	3-SIP, Side View	-40°C ~ 85°C	ROHS3 Compliant	Active
OPL561	TT Electronics / Optek Technology	935nm	Push-Pull	3-SIP, Side View	-40°C ~ 85°C	ROHS3 Compliant	Active
OPL561-OC	TT Electronics / Optek Technology	935nm	Open Collector Inverter	3-SIP, Side View	-40°C ~ 85°C	ROHS3 Compliant	Active

Engineering Selection Recommendations

Preferred Direct Substitutes (Open Collector Output):

OPL550-OCA and OPL551-OCA are the primary recommended substitutes for the SDP8314-301. Both parts maintain open collector output configuration, matching the electrical interface of the original component. All substitute candidates are manufactured by TT Electronics / Optek Technology and carry active product status with ROHS3 compliance, providing superior long-term availability and regulatory support compared to the obsolete SDP8314-301.

Secondary Alternatives (Output Type Adaptation Required):

OPL530, OPL550, OPL550A, OPL551, OPL560, and OPL561 are functionally compatible at the optical detection level (935nm wavelength, -40°C to 85°C operating range) but feature alternative output types (NPN or push-pull). These parts require circuit-level interface modifications to accommodate output type differences. Selection of these alternatives is appropriate only when circuit redesign is feasible.

Compliance Considerations:

All substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with modern procurement standards. Moisture sensitivity level remains constant at MSL 1 (unlimited) across all candidates, eliminating moisture handling requirement changes during component transition.

Frequently Asked Questions (FAQ)

Q: Can OPL550-OCA directly replace SDP8314-301 without circuit modification?

A: OPL550-OCA maintains the same wavelength (935nm), operating temperature range (-40°C to 85°C), and open collector output type as the SDP8314-301. Direct substitution is electrically compatible. Package configuration differs (side view without radial specification), requiring mechanical verification for the specific application.

Q: What is the difference between OPL551-OCA and OPL551-OC?

A: Both parts feature open collector inverter output type and identical electrical specifications. The designation difference reflects internal product numbering within the TT Electronics / Optek Technology Photologic series. Both are functionally equivalent for 935nm photo detection applications.

Q: Why do some substitute parts have "inverter" in the output type description?

A: Open collector inverter output provides inverted logic compared to standard open collector configuration. This affects signal polarity in the application circuit. Selection between standard open collector (OPL550-OCA) and open collector inverter (OPL551-OCA, OPL561-OC) depends on the specific logic requirements of the target application.

Q: Are push-pull output alternatives suitable for direct replacement?

A: Push-pull output types (OPL550, OPL550A, OPL551, OPL560, OPL561) maintain optical detection compatibility but require circuit interface redesign. These alternatives are appropriate only when circuit modification is acceptable and the application can accommodate the different output stage characteristics.

Q: What is the significance of the 3-SIP package designation?

A: 3-SIP (Single In-line Package) refers to a specific physical form factor with three leads in a linear configuration. Parts designated as 3-SIP (OPL530, OPL560, OPL561, OPL561-OC) differ from radial package configurations. Package selection depends on PCB layout and mechanical mounting requirements of the target application.

Q: Do all substitute parts meet the same compliance requirements as SDP8314-301?

A: All listed substitute parts carry ROHS3 compliance and REACH unaffected status, meeting or exceeding the regulatory requirements of the original SDP8314-301 (RoHS Compliant, REACH Unaffected). Moisture sensitivity level remains MSL 1 across all candidates.

Q: What inventory considerations apply to substitute selection?

A: Current inventory levels vary across substitute parts. OPL551-OC maintains the highest inventory (4804 pcs), while OPL551-OCA and OPL561-OC have lower availability (970 and 702 pcs respectively). Inventory status should be verified at time of procurement to ensure supply continuity.

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