QVB21114 Equivalent & Substitute Parts

Part Overview

The QVB21114 is an optical sensor through-beam phototransistor module manufactured by onsemi, designed for slot-type applications with a 0.125" (3.18mm) sensing distance. This component features PC pins and is configured as an unamplified phototransistor output device. The QVB21114 is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing design support and procurement continuity.

Key Parameters

Parameter	QVB21114 Specification
Manufacturer	onsemi
Category	Optical Sensors
Sensing Distance	0.125" (3.18mm)
Sensing Method	Through-Beam
Output Configuration	Phototransistor
Current - DC Forward (If) (Max)	50 mA
Current - Collector (Ic) (Max)	40 mA
Voltage - Collector Emitter Breakdown (Max)	30 V
Operating Temperature	-40°C ~ 85°C
Mounting Type	Through Hole, Flange
Package / Case	Module, PC Pins, Slot Type
Type	Unamplified
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitute parts for the QVB21114 are qualified based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

Sensing Distance: 0.125" (3.18mm)
Sensing Method: Through-Beam
Output Configuration: Phototransistor
Current - DC Forward (If) (Max): 50 mA
Voltage - Collector Emitter Breakdown (Max): 30 V
Operating Temperature Range: -40°C ~ 85°C (or compatible subset)
Type: Unamplified

Secondary Considerations:

Current - Collector (Ic) (Max): Substitute parts rated at 30 mA meet or exceed the QVB21114's 40 mA specification
Mounting Type and Package: Variations in mounting configuration (Through Hole vs. Chassis Mount) and package style (PCB Mount vs. Module, Pre-Wired) are acceptable provided the electrical interface remains compatible
Product Status: Active substitute parts ensure long-term availability and supply chain stability

All identified substitute parts are manufactured by TT Electronics/Optek Technology and maintain electrical compatibility with the QVB21114 across the specified parameter range.

Parameter Comparison

Part Number	Manufacturer	Sensing Distance	Sensing Method	Output Configuration	If (Max)	Ic (Max)	Vce Breakdown (Max)	Operating Temperature	Mounting Type	Package / Case	Type	Product Status
QVB21114	onsemi	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	40 mA	30 V	-40°C ~ 85°C	Through Hole, Flange	Module, PC Pins, Slot Type	Unamplified	Obsolete
OPB370T11	TT Electronics/Optek Technology	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Through Hole	PCB Mount	Unamplified	Active
OPB375T11	TT Electronics/Optek Technology	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Through Hole	PCB Mount	Unamplified	Active
OPB380T11Z	TT Electronics/Optek Technology	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Through Hole	PCB Mount	Unamplified	Active
OPB390T11Z	TT Electronics/Optek Technology	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Through Hole	PCB Mount	Unamplified	Active
OPB828D	TT Electronics/Optek Technology	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Through Hole	PCB Mount	Unamplified	Active
OPB829DZ	TT Electronics/Optek Technology	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 80°C	Chassis Mount	Module, Pre-Wired	Unamplified	Active
OPB880T11Z	TT Electronics/Optek Technology	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Chassis Mount	Module, Pre-Wired	Unamplified	Active
OPB890T11Z	TT Electronics/Optek Technology	0.125" (3.18mm)	Through-Beam	Phototransistor	50 mA	30 mA	30 V	-40°C ~ 85°C	Chassis Mount	PCB Mount	Unamplified	Active

Engineering Selection Recommendations

All identified substitute parts maintain electrical equivalence with the QVB21114 across critical parameters including sensing distance, sensing method, output configuration, forward current, and breakdown voltage. The primary distinction among substitutes lies in package configuration and mounting methodology.

For PCB-mounted applications: OPB370T11, OPB375T11, OPB380T11Z, OPB390T11Z, and OPB828D provide direct electrical equivalence with active product status and ROHS3 compliance, ensuring long-term supply availability.

For pre-wired module applications: OPB829DZ and OPB880T11Z offer chassis-mount configurations with pre-wired connectivity. OPB829DZ operates within -40°C ~ 80°C, while OPB880T11Z extends to -40°C ~ 85°C, matching the QVB21114 temperature specification.

All substitute parts carry REACH Unaffected status and MSL 1 (Unlimited) moisture sensitivity classification, consistent with the original component. Selection should be based on mechanical integration requirements and thermal operating envelope compatibility with the target application.

Frequently Asked Questions (FAQ)

Q: Can OPB370T11, OPB375T11, OPB380T11Z, OPB390T11Z, OPB828D, OPB829DZ, OPB880T11Z, and OPB890T11Z be used interchangeably with QVB21114?

A: These parts are electrically equivalent across all critical parameters: 0.125" (3.18mm) sensing distance, through-beam sensing method, phototransistor output, 50 mA forward current, and 30 V breakdown voltage. Interchangeability depends on mechanical mounting compatibility. PCB-mount variants (OPB370T11, OPB375T11, OPB380T11Z, OPB390T11Z, OPB828D, OPB890T11Z) require PCB integration, while pre-wired modules (OPB829DZ, OPB880T11Z) integrate via chassis mounting and wire connections.

Q: What is the difference between PCB Mount and Module, Pre-Wired packages?

A: PCB Mount variants are soldered directly to printed circuit boards and require discrete wiring or connector integration. Module, Pre-Wired variants arrive with integrated lead wires and are mounted to chassis or enclosure structures, eliminating on-board soldering requirements.

Q: Does the collector current difference between QVB21114 (40 mA) and substitute parts (30 mA) affect compatibility?

A: No. The substitute parts' 30 mA collector current specification meets the QVB21114 requirement. The QVB21114 is rated at 40 mA maximum; substitute parts rated at 30 mA are fully compatible for applications operating within the 30 mA envelope.

Q: Is OPB829DZ suitable for applications requiring -40°C ~ 85°C operation?

A: OPB829DZ operates within -40°C ~ 80°C. For applications requiring full -40°C ~ 85°C coverage, OPB880T11Z is the appropriate pre-wired module substitute.

Q: Are all substitute parts RoHS compliant?

A: Yes. All identified substitute parts carry ROHS3 Compliant certification, ensuring compliance with current environmental and hazardous substance restrictions.

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