AI-221 Equivalent & Substitute Parts Reference

Part Overview

The AI-221 is an internally driven electromechanical magnetic buzzer manufactured by PUI Audio, Inc., designed for 4.5V DC panel mount applications with a 400Hz operating frequency. This component is classified as obsolete, making identification of compatible substitute parts essential for ongoing system support and new design implementations. The compact 32×17mm flange-mounted form factor with wire lead termination defines its primary application space in indicator and alarm circuits requiring direct DC excitation without external driver circuitry.

Substiute Parts

AI-221

PUI Audio, Inc.In Stock: 1117AI-221 Datasheet

Current PartRFQ

AI-2304-TF-LW120-5V-R

PUI Audio, Inc.In Stock: 1659AI-2304-TF-LW120-5V-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AI-221 are identified based on strict alignment with the following critical parameters:

• Voltage Rating: 4.5V nominal operation (substitute must support this voltage)
• Frequency: 400Hz tone generation
• Technology: Electromechanical/Magnetic construction
• Driver Type: Internally driven indicator buzzer (no external driver required)
• Mounting: Panel mount with flange configuration
• Termination: Wire leads
• Physical Dimensions: 32×17mm footprint with 16.05mm maximum seated height
• Input Type: DC excitation

The AI-2304-TF-LW120-5V-R qualifies as a direct substitute because it maintains identical mechanical form factor, electrical input type, frequency, technology, and mounting configuration while providing enhanced specifications including voltage range tolerance, current specification, sound pressure level rating, and improved RoHS compliance status.

Parameter Comparison

Engineering Selection Recommendations

The AI-2304-TF-LW120-5V-R is the qualified substitute for the obsolete AI-221. Selection is based on the following engineering criteria:

Functional Equivalence: Both parts maintain identical mechanical interfaces, electrical input specifications (4.5V DC), frequency output (400Hz), and internal driver architecture. The substitute operates within the same application envelope as the original component.

Compliance Status: The AI-2304-TF-LW120-5V-R achieves ROHS3 compliance, addressing regulatory requirements that the original non-compliant AI-221 cannot satisfy. This is critical for new designs and systems subject to RoHS directives.

Product Availability: The substitute is classified as active product status with confirmed inventory (1563 pcs), ensuring long-term supply chain continuity compared to the obsolete AI-221.

Enhanced Specifications: The substitute provides documented electrical parameters (20mA supply current, 75dB SPL @ 4.5V/10cm) and expanded voltage operating range (3–6V), offering design flexibility while maintaining the rated 4.5V nominal operation point.

Frequently Asked Questions (FAQ)

Q: Can the AI-2304-TF-LW120-5V-R directly replace the AI-221 in existing designs?

A: Yes. Both components share identical mechanical form factor (32×17mm flange mount), electrical input type (4.5V DC), frequency (400Hz), mounting configuration (panel mount), and termination method (wire leads). Direct pin-for-pin substitution is supported.

Q: What is the voltage operating range for the substitute part?

A: The AI-2304-TF-LW120-5V-R operates across 3–6V. The original AI-221 specification lists only 4.5V rated voltage without a defined range. The substitute maintains 4.5V as the nominal operating point while providing tolerance margin.

Q: Are there packaging differences between these parts?

A: The AI-221 packaging is listed as unspecified in available documentation. The AI-2304-TF-LW120-5V-R is supplied in tray packaging. Both maintain identical component dimensions and mounting interface.

Q: What is the current consumption of the substitute?

A: The AI-2304-TF-LW120-5V-R draws 20mA at rated 4.5V operation. The original AI-221 current specification is not documented.

Q: Does the substitute meet modern regulatory requirements?

A: The AI-2304-TF-LW120-5V-R is ROHS3 compliant and REACH unaffected. The original AI-221 is RoHS non-compliant, making the substitute necessary for applications subject to RoHS directives.

Q: Are both parts from the same manufacturer?

A: Yes. Both the AI-221 and AI-2304-TF-LW120-5V-R are manufactured by PUI Audio, Inc., and belong to the AI series product line.