SDP8406-003 Equivalent & Substitute Parts

Part Overview

The SDP8406-003 is a 935nm phototransistor with side view radial mounting manufactured by Honeywell Sensing and Productivity Solutions. This component is classified as obsolete, with 995 pieces currently in stock. The part operates within a collector-emitter breakdown voltage of 30V and a maximum collector current of 6.5mA, designed for through-hole right-angle mounting applications. Due to its obsolete status, equivalent and substitute parts from active manufacturers are necessary for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value	Unit
Wavelength	935nm	nm
Voltage - Collector Emitter Breakdown (Max)	30	V
Current - Collector (Ic) (Max)	6.5	mA
Current - Dark (Id) (Max)	100	nA
Power - Max	100	mW
Viewing Angle	50	°
Mounting Type	Through Hole, Right Angle	-
Orientation	Side View	-
Operating Temperature	-40°C ~ 85°C	°C
Package / Case	Radial	-
RoHS Status	RoHS Compliant	-
Moisture Sensitivity Level (MSL)	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitution compatibility for the SDP8406-003 is determined by the following critical parameters: wavelength (935nm), collector-emitter breakdown voltage (30V maximum), package type (radial through-hole), orientation (side view), and operating temperature range. The maximum collector current and dark current specifications establish the performance envelope within which substitutes must operate.

Substitute parts are grouped into two categories:

Category 1: Direct Equivalents (935nm Wavelength, Side View Radial) Parts OP550A, OP550B, OP550C, and OP555A maintain the 935nm wavelength specification and side view radial package configuration. These parts share identical collector-emitter breakdown voltage (30V), dark current (100nA), and power dissipation (100mW) ratings. Variations exist in maximum collector current and viewing angle specifications.

Category 2: Functional Alternatives (Different Wavelength or Sensing Method) Part OPS698 operates as a through-beam phototransistor with different sensing methodology and higher current capacity (50mA DC forward current). Part PT928-6C-F uses 940nm wavelength with significantly higher collector current (40mA) and different operating temperature range (-25°C ~ 85°C).

Parameter Comparison

Parameter	SDP8406-003	OP550A	OP550B	OP550C	OP555A	OPS698	PT928-6C-F
Manufacturer	Honeywell	TT Electronics/Optek	TT Electronics/Optek	TT Electronics/Optek	TT Electronics/Optek	TT Electronics/Optek	Everlight Electronics
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
Wavelength (nm)	935	935	935	935	935	-	940
Voltage - Collector Emitter Breakdown (Max) (V)	30	30	30	30	30	30	30
Current - Collector (Ic) (Max) (mA)	6.5	4.7	4.7	2.4	4.7	50	40
Current - Dark (Id) (Max) (nA)	100	100	100	100	100	-	100
Power - Max (mW)	100	100	100	100	100	-	-
Viewing Angle (°)	50	-	-	-	56	-	-
Mounting Type	Through Hole, Right Angle	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole, Right Angle
Orientation	Side View	Side View	Side View	Side View	Side View	-	Side View
Operating Temperature (°C)	-40 ~ 85	-40 ~ 100	-40 ~ 100	-40 ~ 100	-40 ~ 100	-40 ~ 100	-25 ~ 85
Package / Case	Radial	Radial	Radial	Radial	Radial	Radial	Radial, Side View
RoHS Status	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitutes (Direct Equivalents):

OP550A, OP550B, and OP550C are active-status direct equivalents manufactured by TT Electronics/Optek Technology. All three maintain 935nm wavelength, 30V collector-emitter breakdown voltage, 100nA dark current, and 100mW power dissipation. These parts feature extended operating temperature range (-40°C ~ 100°C) compared to the SDP8406-003 (-40°C ~ 85°C). Collector current specifications vary: OP550A and OP550B provide 4.7mA (below the SDP8406-003 maximum of 6.5mA), while OP550C provides 2.4mA. All three carry ROHS3 compliance and unlimited moisture sensitivity rating.

OP555A provides identical electrical specifications to OP550A and OP550B (4.7mA collector current) with an extended viewing angle of 56° compared to the SDP8406-003 specification of 50°. This part is suitable for applications requiring wider angular response.

Secondary Substitutes (Functional Alternatives):

OPS698 operates as a through-beam phototransistor with significantly higher current capacity (50mA DC forward current) and different sensing methodology. This part is suitable only for applications where through-beam sensing replaces side-view sensing requirements.

PT928-6C-F from Everlight Electronics operates at 940nm wavelength with 40mA maximum collector current and maintains the through-hole right-angle mounting configuration. The operating temperature range (-25°C ~ 85°C) is narrower at the low end compared to the SDP8406-003. This part is suitable for applications tolerating 5nm wavelength deviation and requiring higher current capacity.

Compliance Status:

All substitute parts carry ROHS3 compliance and MSL 1 (Unlimited) rating, matching the environmental and handling requirements of the original SDP8406-003.

Frequently Asked Questions (FAQ)

Q: Can OP550A, OP550B, and OP550C be used interchangeably with SDP8406-003?

A: These three parts share identical wavelength (935nm), collector-emitter breakdown voltage (30V), dark current (100nA), and power dissipation (100mW) specifications. The primary difference is maximum collector current: OP550A and OP550B provide 4.7mA, while OP550C provides 2.4mA, both below the SDP8406-003 specification of 6.5mA. Selection depends on circuit current requirements. All three are active-status products with extended operating temperature range.

Q: What is the difference between OP550A/OP550B and OP555A?

A: OP550A and OP550B are electrically identical (4.7mA collector current, 935nm wavelength). OP555A provides the same collector current and wavelength but features a wider viewing angle of 56° compared to the unspecified viewing angle of OP550A/OP550B. The OP555A is suitable for applications requiring extended angular response.

Q: Can PT928-6C-F replace SDP8406-003 directly?

A: PT928-6C-F operates at 940nm wavelength (5nm deviation from 935nm specification) with significantly higher collector current (40mA). The operating temperature range is -25°C ~ 85°C, narrower at the low end than SDP8406-003 (-40°C ~ 85°C). This part is suitable only for applications tolerating wavelength deviation and requiring higher current capacity.

Q: Is OPS698 a suitable replacement?

A: OPS698 operates as a through-beam phototransistor with different sensing methodology compared to the side-view configuration of SDP8406-003. This part is suitable only for applications where through-beam sensing replaces side-view sensing requirements. The 50mA DC forward current specification indicates different circuit application.

Q: What are the compliance and packaging considerations?

A: All substitute parts carry ROHS3 compliance and MSL 1 (Unlimited) rating. All parts use radial through-hole packaging. OP550A, OP550B, OP550C, and OP555A maintain side-view orientation matching SDP8406-003. PT928-6C-F maintains right-angle mounting configuration. OPS698 does not specify viewing angle or orientation details.

Q: Which substitute offers the best operating temperature range?

A: OP550A, OP550B, OP550C, and OP555A all provide extended operating temperature range of -40°C ~ 100°C, compared to SDP8406-003 specification of -40°C ~ 85°C. PT928-6C-F provides -25°C ~ 85°C, narrower at the low end.

Q: Are all substitutes currently in stock?

A: All substitute parts are listed as active-status products with inventory availability: OP550A (1990 pcs), OP550B (1137 pcs), OP550C (3688 pcs), OP555A (862 pcs), OPS698 (1139 pcs), and PT928-6C-F (3200 pcs).

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