VTT3323LAH Equivalent & Substitute Parts

Part Overview

The VTT3323LAH is a phototransistor manufactured by Excelitas Technologies, designed for top-view radial optical sensing applications. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations. The VTT3323LAH operates as a light-sensitive transistor suitable for applications requiring photoelectric detection in a radial package configuration.

Substiute Parts

VTT3323LAH

Excelitas TechnologiesIn Stock: 1183VTT3323LAH Datasheet

Current PartRFQ

LTR-4206

Lite-On Inc.In Stock: 13277LTR-4206 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The LTR-4206 qualifies as a functional substitute for the VTT3323LAH based on the following critical parameters:

• Voltage Rating: Both components specify 30 V maximum collector-emitter breakdown voltage, ensuring electrical compatibility in circuit designs
• Dark Current: Both maintain 100 nA maximum dark current specification, providing equivalent baseline leakage characteristics
• Viewing Angle: Both components feature 20° viewing angle, ensuring optical field-of-view compatibility
• Mounting Type & Orientation: Both are through-hole mounted components with top-view orientation, allowing direct mechanical substitution in existing PCB layouts
• Functional Category: Both are phototransistors designed for optical sensing applications

The LTR-4206 is an active product from Lite-On Inc., providing long-term availability and supply chain continuity for the obsolete VTT3323LAH.

Parameter Comparison

Engineering Selection Recommendations

The LTR-4206 is the manufacturer-recommended substitute for the obsolete VTT3323LAH. Selection of the LTR-4206 is supported by:

• Active Product Status: The LTR-4206 is an active product with confirmed inventory availability (13,229 pcs), ensuring reliable procurement for both replacement and new production applications
• Regulatory Compliance: The LTR-4206 meets ROHS3 compliance and is REACH unaffected, satisfying modern environmental and regulatory requirements
• Electrical Compatibility: Matching voltage breakdown rating (30 V) and dark current specification (100 nA) ensure direct functional equivalence in existing circuit designs
• Mechanical Compatibility: Identical mounting type (through hole), orientation (top view), and viewing angle (20°) permit direct PCB layout substitution

Note: The LTR-4206 features a T-1 package versus the radial package of the VTT3323LAH. Physical footprint verification is required prior to implementation.

Frequently Asked Questions (FAQ)

Q: Can the LTR-4206 be used as a direct replacement for the VTT3323LAH in existing designs?

A: The LTR-4206 meets all critical electrical and optical parameters (voltage rating, dark current, viewing angle) and shares identical mounting type and orientation. However, the package form differs (T-1 versus radial), requiring PCB footprint verification before implementation.

Q: What are the key differences between these components?

A: The primary differences are product status (obsolete versus active), package configuration (radial versus T-1), and maximum collector current (100 µA versus 4.8 mA). The LTR-4206 also includes specified operating temperature range and regulatory compliance documentation.

Q: Is the higher collector current rating of the LTR-4206 a concern?

A: The LTR-4206 maximum collector current of 4.8 mA exceeds the VTT3323LAH specification of 100 µA. This represents a higher current capability and does not prevent substitution in applications designed for the lower current rating, as the component will operate within the original design envelope.

Q: What compliance certifications apply to the LTR-4206?

A: The LTR-4206 is ROHS3 compliant and REACH unaffected. The VTT3323LAH compliance status is not specified in available documentation.

Q: Are there inventory considerations for these components?

A: The VTT3323LAH is obsolete with limited remaining stock (1,089 pcs). The LTR-4206 is an active product with substantial inventory availability (13,229 pcs), providing long-term supply chain security.