AI-155 Equivalent & Substitute Parts

Part Overview

The AI-155 is an internally driven electromechanical magnetic buzzer rated for 5V DC operation with through-hole PC pin termination. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and production continuity. The AI-155 serves as an audio indicator in applications requiring simple DC-powered alert signaling without external driver circuitry.

Substiute Parts

AI-155

PUI Audio, Inc.In Stock: 1109AI-155 Datasheet

Current PartRFQ

AI-1223-TWT-5V-R

PUI Audio, Inc.In Stock: 24647AI-1223-TWT-5V-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The AI-1223-TWT-5V-R qualifies as a direct substitute for the AI-155 based on the following critical parameters:

• Identical manufacturer (PUI Audio, Inc.)
• Identical rated voltage (5V DC)
• Identical driver circuitry classification (Indicator, Internally Driven)
• Identical input type (DC)
• Identical technology (Electromechanical/Magnetic)
• Identical mounting type (Through Hole)
• Identical termination style (PC Pins)
• Active product status with current inventory availability

The AI-1223-TWT-5V-R represents the current production equivalent within the same product family, designed to replace the obsolete AI-155 in new and legacy applications.

Parameter Comparison

Engineering Selection Recommendations

The AI-1223-TWT-5V-R is the appropriate substitute for the obsolete AI-155. Selection is based on:

• Functional equivalence across all core electrical parameters (5V DC rated voltage, internally driven indicator operation, DC input type)
• Identical mechanical interface (through-hole mounting with PC pin termination)
• Active product status with established supply chain availability
• ROHS3 compliance of the substitute part, addressing regulatory requirements for new designs and production runs
• Same manufacturer lineage, ensuring design continuity and compatibility with existing PCB layouts

The substitute part provides additional documented specifications (frequency, SPL, current draw, operating temperature range, and physical dimensions) that were not published for the original AI-155, enabling more precise circuit design validation.

Frequently Asked Questions (FAQ)

Q: Can the AI-1223-TWT-5V-R be used as a direct replacement for the AI-155 on existing PCBs?

A: Yes. Both parts share identical mounting type (through-hole), termination style (PC pins), rated voltage (5V DC), and driver circuitry classification (internally driven indicator). Physical dimensions of the AI-1223-TWT-5V-R (12mm diameter, 9.7mm height) are compatible with standard through-hole PCB layouts designed for 5V magnetic buzzers.

Q: What is the primary reason for substitution?

A: The AI-155 is classified as obsolete. The AI-1223-TWT-5V-R is the active production equivalent from the same manufacturer, ensuring continued availability for new production and legacy support applications.

Q: Are there compliance differences between the two parts?

A: Yes. The AI-155 is RoHS non-compliant, while the AI-1223-TWT-5V-R is ROHS3 compliant. For applications subject to RoHS regulations, the substitute part is required.

Q: What additional specifications are available for the substitute part?

A: The AI-1223-TWT-5V-R provides documented operating voltage range (3-7V), frequency (2.3kHz), sound pressure level (85dB @ 5V, 10cm), supply current (30mA), operating temperature range (-40°C to 85°C), and physical dimensions. These specifications were not published for the AI-155.

Q: Is the substitute part available in the same packaging?

A: The AI-155 packaging is not specified in available documentation. The AI-1223-TWT-5V-R is supplied in tray packaging with current inventory of 24,615 units.