LTH-1550-06 Equivalent & Substitute Parts

Part Overview

The LTH-1550-06 is a reflective optical sensor manufactured by Lite-On Inc., classified as a photointerrupter with phototransistor output. This component is designed for applications requiring non-contact object detection using 940nm infrared wavelength. The part is currently listed as obsolete, making identification of compatible substitute components essential for ongoing production support and design continuity.

Substiute Parts

LTH-1550-06

Lite-On Inc.In Stock: 1052LTH-1550-06 Datasheet

Current PartRFQ

ITR8307

Everlight Electronics Co LtdIn Stock: 40379ITR8307 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution compatibility for the LTH-1550-06 is determined by the following critical parameters:

• Sensing Method: Reflective optical sensing at 940nm wavelength
• Output Type: Phototransistor configuration
• Package / Case: 4-SMD with flat leads for surface mount assembly
• Electrical Ratings: Collector-emitter breakdown voltage of 30V minimum, collector current capability, and forward current specifications
• Operating Temperature Range: -25°C to 85°C
• Moisture Sensitivity: MSL 1 classification

The ITR8307 from Everlight Electronics Co Ltd meets these core substitution criteria, maintaining identical package geometry, sensing method, output type, and thermal operating range. Both components utilize the same 4-SMD flat lead configuration and are classified as reflective optical sensors with phototransistor outputs.

Parameter Comparison

Engineering Selection Recommendations

The ITR8307 is the designated manufacturer-recommended substitute for the LTH-1550-06. Selection of this alternative component is supported by:

• Active Product Status: The ITR8307 is actively manufactured and maintained by Everlight Electronics Co Ltd, ensuring long-term availability and supply chain continuity.
• Identical Package Geometry: Both components utilize 4-SMD flat lead packaging, enabling direct PCB footprint compatibility without layout modifications.
• Matched Electrical Specifications: Core electrical ratings including 30V collector-emitter breakdown voltage and operating temperature range (-25°C to 85°C) are identical.
• RoHS3 Compliance: The ITR8307 carries RoHS3 certification, meeting current environmental and regulatory requirements.
• Reflective Sensing Architecture: Both components employ identical reflective optical sensing methodology with phototransistor output configuration.

Electrical parameter differences exist in collector current (ITR8307: 50mA vs. LTH-1550-06: 20mA) and response time (ITR8307: 20µs vs. LTH-1550-06: 3-4µs). These differences must be evaluated against specific application requirements to confirm functional equivalence in the target circuit.

Frequently Asked Questions (FAQ)

Q: Can the ITR8307 be used as a direct replacement for the LTH-1550-06 without PCB modifications?

A: Yes. Both components share identical 4-SMD flat lead packaging and footprint geometry, allowing direct PCB substitution without layout changes.

Q: What are the key differences between these two parts?

A: The primary differences are response time (LTH-1550-06: 3-4µs vs. ITR8307: 20µs) and maximum collector current rating (LTH-1550-06: 20mA vs. ITR8307: 50mA). The ITR8307 is actively manufactured while the LTH-1550-06 is obsolete.

Q: Are the sensing distances equivalent?

A: The LTH-1550-06 does not specify a sensing distance parameter. The ITR8307 is rated for 0.039" (1mm) sensing distance. Application-specific testing is required to confirm distance compatibility.

Q: Does the ITR8307 meet current regulatory requirements?

A: Yes. The ITR8307 is RoHS3 compliant and carries current environmental certifications. The LTH-1550-06 status as an obsolete component may present regulatory compliance challenges in new designs.

Q: What is the impact of the response time difference?

A: The LTH-1550-06 has a faster response time (3-4µs) compared to the ITR8307 (20µs). Applications requiring sub-microsecond switching performance must evaluate whether the ITR8307's response time meets timing requirements.

Q: Are there inventory considerations for this substitution?

A: The ITR8307 has significantly higher inventory availability (40,363 pcs) compared to the LTH-1550-06 (1,040 pcs), supporting long-term supply chain reliability.