AI-251 Equivalent & Substitute Parts

Part Overview

The AI-251 is a piezo buzzer indicator designed for 12V DC panel mount applications with a 22mm flange form factor and wire lead termination. This component is classified as obsolete, necessitating identification of active equivalent parts to maintain design continuity and ensure supply chain availability. The AI-251 provides internally driven piezo indication functionality suitable for alarm and alert applications requiring panel-mounted installation.

Substiute Parts

AI-251

PUI Audio, Inc.In Stock: 730AI-251 Datasheet

Current PartRFQ

AI-3245-TF-LW95-R

PUI Audio, Inc.In Stock: 7133AI-3245-TF-LW95-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The AI-3245-TF-LW95-R qualifies as a direct substitute for the AI-251 based on the following alignment of critical parameters:

• Manufacturer: Both parts are manufactured by PUI Audio, Inc., ensuring design and quality consistency within the same product family
• Series: Both belong to the AI series
• Technology: Both utilize piezo technology
• Driver Circuitry: Both feature internally driven indicator circuitry
• Input Type: Both accept DC input
• Voltage - Rated: Both are rated for 12V operation
• Mounting Type: Both employ panel mount flange configuration
• Termination: Both use wire leads
• Size / Dimension: Both maintain the 0.866" diameter (22.00mm) form factor, ensuring mechanical compatibility with existing panel cutouts

The AI-3245-TF-LW95-R represents an active product with enhanced specifications including defined frequency response (4.5kHz), sound pressure level (90dB @ 12V, 10cm), current consumption (5mA), extended voltage range (3 ~ 28V), and operating temperature range (-20°C ~ 60°C).

Parameter Comparison

Engineering Selection Recommendations

The AI-3245-TF-LW95-R is the appropriate substitute for the obsolete AI-251. Selection is based on the following engineering criteria:

• Product Status: The AI-3245-TF-LW95-R maintains active product status with ongoing manufacturer support and supply availability, whereas the AI-251 is obsolete
• Compliance: The AI-3245-TF-LW95-R achieves ROHS3 compliance, addressing regulatory requirements for new designs and procurement cycles
• Mechanical Compatibility: Identical 22mm flange diameter and wire lead termination ensure direct replacement in existing panel mount applications with minimal design modification
• Electrical Compatibility: Rated 12V operation with extended voltage range (3 ~ 28V) provides operational flexibility beyond the original specification
• Certifications: Both parts share identical ECCN (EAR99) and HTSUS (8531.80.9041) classifications, maintaining export and tariff consistency

Frequently Asked Questions (FAQ)

Q: Can the AI-3245-TF-LW95-R be used as a direct replacement for the AI-251 in existing designs?

A: Yes. Both parts share identical mounting type (panel mount flange), termination method (wire leads), and form factor (22mm diameter). The AI-3245-TF-LW95-R fits existing panel cutouts and wiring configurations without mechanical modification.

Q: What are the key differences between the AI-251 and AI-3245-TF-LW95-R?

A: The AI-3245-TF-LW95-R provides specified performance parameters including 4.5kHz frequency, 90dB SPL at 12V/10cm, 5mA current consumption, and -20°C to 60°C operating temperature range. The AI-251 specifications for these parameters were not documented. The AI-3245-TF-LW95-R also achieves ROHS3 compliance versus the non-compliant AI-251.

Q: Are there packaging differences between these parts?

A: The AI-251 packaging is listed as unspecified, while the AI-3245-TF-LW95-R is supplied in bulk packaging. This distinction affects procurement and inventory management but does not impact functional compatibility.

Q: Does the slightly smaller height of the AI-3245-TF-LW95-R (10.80mm vs 11.30mm) affect panel mount installation?

A: No. The 0.5mm height reduction is within typical mechanical tolerance and does not affect panel cutout compatibility or flange seating. Both parts maintain the same 22mm diameter flange specification.

Q: What is the voltage operating range for the AI-3245-TF-LW95-R?

A: The AI-3245-TF-LW95-R operates across 3 ~ 28V, providing broader voltage compatibility than the AI-251's 12V rated specification. This extended range accommodates variable supply conditions while maintaining 12V as the rated operating point.