RPI-574 Equivalent & Substitute Parts

Part Overview

The RPI-574 is an optical sensor manufactured by Rohm Semiconductor, designed as a through-beam phototransistor with PCB mount configuration. This component features a 0.197" (5mm) sensing distance and is classified as an unamplified optical sensor for slot detection applications. The RPI-574 is currently listed as obsolete, making identification of compatible substitute parts essential for ongoing system support and new design implementations. Substitute parts must maintain electrical compatibility across critical parameters including collector current, breakdown voltage, response time, and operating temperature range.

Substiute Parts

RPI-574

Rohm SemiconductorIn Stock: 55626RPI-574 Datasheet

Current PartRFQ

RPI-441C1

Rohm SemiconductorIn Stock: 181784RPI-441C1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RPI-574 is based on strict electrical and mechanical parameter alignment. The primary substitute, RPI-441C1, maintains compatibility through the following critical parameters:

• Identical sensing method (through-beam)
• Identical output configuration (phototransistor)
• Identical DC forward current maximum (50 mA)
• Identical collector current maximum (30 mA)
• Identical collector-emitter breakdown voltage (30 V)
• Identical response time (10µs)
• Identical operating temperature range (-25°C to 85°C)
• Identical mounting type (through hole)
• Identical package type (PCB mount)
• Identical sensor type (unamplified)
• Identical RoHS compliance status (ROHS3)
• Identical MSL rating (1 - Unlimited)

The primary difference between RPI-574 and RPI-441C1 is the sensing distance: RPI-574 operates at 0.197" (5mm) while RPI-441C1 operates at 0.157" (4mm). This parameter difference must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The RPI-441C1 is the manufacturer-recommended substitute for the obsolete RPI-574. Both components share identical electrical specifications and compliance certifications, ensuring functional equivalence in circuit design and regulatory requirements.

The RPI-441C1 offers the additional advantage of active product status, providing assured long-term availability and supply chain continuity compared to the obsolete RPI-574. Both components maintain ROHS3 compliance and identical MSL ratings, supporting equivalent environmental and manufacturing process requirements.

The primary design consideration is the sensing distance differential: RPI-574 at 0.197" (5mm) versus RPI-441C1 at 0.157" (4mm). This parameter must be evaluated against specific application slot width and object detection requirements to confirm mechanical compatibility within the target assembly.

Frequently Asked Questions (FAQ)

Q: Can RPI-441C1 directly replace RPI-574 in existing designs?

A: Electrical and functional compatibility is confirmed across all specified parameters. Mechanical compatibility depends on the application's sensing distance requirement. The 0.04" (1mm) reduction in sensing distance must be evaluated against the specific slot width and detection geometry of the target application.

Q: What is the significance of the product status difference?

A: RPI-574 is classified as obsolete, indicating discontinued manufacturing and limited availability. RPI-441C1 maintains active product status, ensuring ongoing manufacturing support and supply availability. For new designs and long-term system support, RPI-441C1 is the appropriate selection.

Q: Are the RoHS and MSL ratings equivalent between these parts?

A: Both RPI-574 and RPI-441C1 maintain identical ROHS3 compliance and MSL Level 1 (Unlimited) ratings. No additional environmental or manufacturing process modifications are required when transitioning between these components.

Q: What electrical parameters determine substitution compatibility?

A: Substitution compatibility is established through matching DC forward current (50 mA), collector current (30 mA), collector-emitter breakdown voltage (30 V), response time (10µs), and operating temperature range (-25°C to 85°C). All these parameters are identical between RPI-574 and RPI-441C1.

Q: Is the sensing distance difference critical for all applications?

A: Sensing distance is application-specific. Applications with slot widths or detection geometries requiring 0.197" (5mm) sensing distance may require design modification to accommodate the RPI-441C1's 0.157" (4mm) specification. Applications with larger slot widths or detection distances can accommodate the reduced sensing distance without modification.