MSR320 Piezo Buzzer - Equivalent & Substitute Parts

Part Overview

The MSR320 is a 23mm through-hole piezo buzzer manufactured by Mallory Sonalert Products Inc., designed as an internally driven indicator with single-tone operation. It operates across a 3–20V DC input range, drawing 3–16mA of supply current, and produces 73dB sound pressure level at 3V measured 30cm away. The MSR320 is classified as obsolete product status. Due to its obsolescence, identifying functionally equivalent active alternatives is necessary for ongoing design support, production continuity, and component procurement.

Substiute Parts

MSR320

Mallory Sonalert Products Inc.In Stock: 906MSR320 Datasheet

Current PartRFQ

MSR320R

Mallory Sonalert Products Inc.In Stock: 1993MSR320R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The MSR320R qualifies as a direct substitute for the MSR320 based on the following matching parameters:

• Identical manufacturer (Mallory Sonalert Products Inc.)
• Identical series designation (MSR)
• Identical technology (Piezo)
• Identical driver circuitry (Indicator, Internally Driven)
• Identical input type (DC)
• Identical voltage range (3–20V)
• Identical frequency (4.6kHz)
• Identical operating mode (Single Tone)
• Identical sound pressure level (73dB @ 3V, 30cm)
• Identical current supply range (3–16mA)
• Identical mounting type (Through Hole)
• Identical termination (PC Pins)
• Identical physical dimensions (0.906" Dia / 23.00mm, 0.421" height max)
• Identical operating temperature range (–40°C to 85°C)

The MSR320R maintains full electrical and mechanical compatibility with the MSR320, with the primary distinction being product status and regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

The MSR320R is the direct active equivalent for the obsolete MSR320. Both components are manufactured by Mallory Sonalert Products Inc. and share identical electrical performance and mechanical specifications. The MSR320R is currently in active production status, ensuring long-term availability and supply chain continuity.

A key distinction is regulatory compliance: the MSR320R achieves ROHS3 compliance, whereas the MSR320 is RoHS non-compliant. For applications subject to RoHS directives or environmental regulations, the MSR320R is the appropriate selection. Both components maintain REACH Unaffected status.

For new designs or production transitions from the obsolete MSR320, the MSR320R provides identical form, fit, and function with the added benefit of active product status and modern regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can the MSR320R directly replace the MSR320 in existing designs? A: Yes. The MSR320R maintains identical electrical specifications (3–20V DC input, 3–16mA supply current, 4.6kHz frequency, 73dB SPL), identical physical dimensions (23mm diameter, 10.70mm height), and identical mounting configuration (through-hole PC pins). No circuit modifications are required.

Q: What is the primary reason to transition from MSR320 to MSR320R? A: The MSR320 is classified as obsolete product status. The MSR320R is the active equivalent, ensuring ongoing availability, supply chain support, and regulatory compliance (ROHS3).

Q: Are there packaging differences between MSR320 and MSR320R? A: The MSR320 is supplied in standard packaging, while the MSR320R is supplied in bulk packaging. Both contain identical components with no functional differences.

Q: Do both parts operate across the same voltage and temperature ranges? A: Yes. Both the MSR320 and MSR320R operate across 3–20V DC input and –40°C to 85°C operating temperature range.

Q: What is the significance of the RoHS compliance difference? A: The MSR320R achieves ROHS3 compliance, meeting current environmental and hazardous substance restrictions. The MSR320 is RoHS non-compliant. For applications in regulated markets or requiring RoHS certification, the MSR320R is the appropriate selection.