SDP8304-301 Equivalent & Substitute Parts

Part Overview

The SDP8304-301 is a 935nm optical photo detector with logic output manufactured by Honeywell Sensing and Productivity Solutions. This component features an open collector output configuration in a radial 3-lead side-view package. The device is classified as obsolete, necessitating identification of active equivalent and substitute components for ongoing design requirements and production continuity. Substitute parts must maintain functional compatibility across wavelength, output type, operating temperature range, and compliance certifications.

Key Parameters

Parameter	SDP8304-301 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)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution logic for the SDP8304-301 is based on the following critical parameters:

Primary Matching Criteria:

Wavelength: 935nm (infrared detection band)
Type: Photo Detector with Logic Output
Output Type: Open Collector (exact electrical interface match)
Operating Temperature Range: -40°C ~ 85°C (thermal compatibility)
Package Configuration: Side View orientation

Substitute Classification:

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

Direct Substitutes (Open Collector Output): Parts with identical open collector output type, enabling direct pin-level replacement with no circuit modification. These include OPL550-OCA, OPL560-OCA, and OPL551-OC/OPL551-OCA variants.
Functional Equivalents (Alternative Output Types): Parts with push-pull or NPN output configurations that provide equivalent 935nm detection functionality but require circuit interface adaptation. These include OPL530 (NPN), OPL550 (Push-Pull), OPL550A (Push-Pull), OPL551 (Push-Pull), OPL560 (Push-Pull), and OPL561 (Push-Pull).

All substitute candidates are manufactured by TT Electronics/Optek Technology under the Photologic® series, maintain the 935nm wavelength specification, support the -40°C ~ 85°C operating temperature range, and comply with RoHS3 and REACH requirements.

Parameter Comparison

Part Number	Manufacturer	Wavelength	Type	Output Type	Package / Case	Operating Temperature	RoHS Status	MSL	Product Status
SDP8304-301	Honeywell	935nm	Photo Detector, Logic Output	Open Collector	Radial, 3 Lead, Side View	-40°C ~ 85°C	RoHS Compliant	1	Obsolete
OPL530	TT Electronics/Optek	935nm	Photo Detector, Logic Output	NPN	3-SIP, Side View	-40°C ~ 85°C	ROHS3 Compliant	1	Active
OPL550	TT Electronics/Optek	935nm	Photo Detector, Logic Output	Push-Pull	Side View	-40°C ~ 85°C	ROHS3 Compliant	1	Active
OPL550-OCA	TT Electronics/Optek	935nm	Photo Detector, Logic Output	Open Collector	Side View	-40°C ~ 85°C	ROHS3 Compliant	1	Active
OPL550A	TT Electronics/Optek	935nm	Photo Detector, Logic Output	Push-Pull	Side View	-40°C ~ 85°C	ROHS3 Compliant	1	Active
OPL551	TT Electronics/Optek	935nm	Photo Detector, Logic Output	Push-Pull	Side View	-40°C ~ 85°C	ROHS3 Compliant	1	Active
OPL551-OC	TT Electronics/Optek	935nm	Photo Detector, Logic Output	Open Collector Inverter	Side View	-40°C ~ 85°C	ROHS3 Compliant	1	Active
OPL551-OCA	TT Electronics/Optek	935nm	Photo Detector, Logic Output	Open Collector Inverter	Side View	-40°C ~ 85°C	ROHS3 Compliant	1	Active
OPL560	TT Electronics/Optek	935nm	Photo Detector, Logic Output	Push-Pull	3-SIP, Side View	-40°C ~ 85°C	ROHS3 Compliant	1	Active
OPL560-OCA	TT Electronics/Optek	935nm	Photo Detector, Logic Output	Open Collector	3-SIP, Side View	-40°C ~ 85°C	ROHS3 Compliant	1	Active
OPL561	TT Electronics/Optek	935nm	Photo Detector, Logic Output	Push-Pull	3-SIP, Side View	-40°C ~ 85°C	ROHS3 Compliant	1	Active

Engineering Selection Recommendations

For Direct Replacement (No Circuit Modification):

OPL550-OCA is the primary direct substitute for SDP8304-301. Both components feature open collector output configuration, 935nm wavelength detection, identical operating temperature range (-40°C ~ 85°C), and MSL 1 rating. OPL550-OCA is active in production with ROHS3 compliance and REACH unaffected status, providing superior long-term availability compared to the obsolete SDP8304-301. Inventory availability is 1387 units.

OPL560-OCA provides an alternative direct substitute with identical electrical specifications and open collector output. The 3-SIP package configuration differs from the radial 3-lead package of SDP8304-301, requiring mechanical board layout adaptation. Inventory availability is 909 units.

For Functional Equivalence (Circuit Interface Adaptation Required):

OPL530 offers NPN output configuration with 3-SIP side-view package. This substitute requires pull-up resistor network modification and logic signal inversion handling in the receiving circuit. Inventory availability is 1817 units.

OPL550, OPL550A, OPL551, OPL560, and OPL561 provide push-pull output alternatives. These substitutes require circuit redesign to accommodate push-pull logic levels and eliminate external pull-up resistor dependencies. All variants maintain 935nm wavelength and -40°C ~ 85°C thermal specifications.

OPL551-OC and OPL551-OCA feature open collector inverter output, providing open collector interface compatibility with inverted logic polarity. Circuit logic inversion handling is required.

All substitute parts maintain RoHS3 compliance and REACH unaffected status, ensuring regulatory continuity. Product status is active for all candidates, guaranteeing production availability and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can OPL550-OCA directly replace SDP8304-301 without circuit modification?

A: Yes. OPL550-OCA matches the critical substitution parameters: 935nm wavelength, open collector output type, -40°C ~ 85°C operating temperature range, and MSL 1 rating. No circuit modification is required for electrical interface compatibility. Package configuration is side view, consistent with SDP8304-301 mechanical orientation.

Q: What is the difference between OPL550-OCA and OPL560-OCA?

A: Both components feature open collector output and 935nm wavelength. The primary difference is package configuration: OPL550-OCA uses a side-view package, while OPL560-OCA uses a 3-SIP side-view package. Selection depends on available board space and mechanical mounting requirements. Electrical performance is equivalent.

Q: Why do OPL551-OC and OPL551-OCA have "inverter" in their output type description?

A: OPL551-OC and OPL551-OCA feature open collector inverter output, meaning the logic signal is inverted relative to standard open collector devices. These parts are suitable for SDP8304-301 replacement only if the receiving circuit can accommodate inverted logic polarity or if external logic inversion is implemented.

Q: Can I use OPL550 (push-pull output) instead of OPL550-OCA (open collector)?

A: OPL550 and OPL550-OCA are functionally equivalent in terms of 935nm detection and operating temperature range. However, output type differs: OPL550 provides push-pull output while OPL550-OCA provides open collector output. Direct substitution of OPL550 for SDP8304-301 requires circuit modification to handle push-pull logic levels and eliminate external pull-up resistor dependencies. OPL550-OCA is the preferred substitute for direct replacement.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed (OPL530, OPL550, OPL550-OCA, OPL550A, OPL551, OPL551-OC, OPL551-OCA, OPL560, OPL560-OCA, OPL561) are ROHS3 compliant. SDP8304-301 is RoHS compliant. All candidates meet regulatory requirements for lead-free and hazardous substance restrictions.

Q: What is the significance of MSL 1 (Unlimited) rating?

A: MSL 1 indicates moisture sensitivity level 1, the lowest moisture sensitivity classification. Components with MSL 1 have unlimited shelf life and do not require special moisture-controlled storage or handling. Both SDP8304-301 and all substitute parts carry MSL 1 rating, ensuring equivalent storage and handling requirements.

Q: Why is SDP8304-301 classified as obsolete?

A: Obsolete status indicates the component is no longer manufactured by Honeywell. Substitute parts from TT Electronics/Optek Technology are active in production, providing continuity for designs requiring 935nm optical detection with logic output functionality.

Q: Can I mix OPL550-OCA and OPL560-OCA in the same design?

A: Yes, if mechanical board layout permits. Both components provide identical electrical specifications (935nm wavelength, open collector output, -40°C ~ 85°C operating temperature). Package differences (side view vs. 3-SIP side view) require separate board layout considerations but do not affect electrical interchangeability.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message