SC110K Piezo Buzzer - Equivalent & Substitute Parts

Part Overview

The SC110K is an internally driven piezo buzzer manufactured by Mallory Sonalert Products Inc., designed for panel mount applications with screw terminal and quick connect tab termination. This component operates across AC and DC voltage ranges of 30–120V, producing a 2.9kHz tone at 70dB SPL (measured at 30V, 61cm distance) with a current draw of 6–22mA. The part is classified as Active product status and carries cUL approval. Substitute parts are identified when electrical performance, mechanical compatibility, and operational parameters remain equivalent across the specified voltage, frequency, sound pressure level, and mounting configuration.

Substiute Parts

SC110K

Mallory Sonalert Products Inc.In Stock: 804SC110K Datasheet

Current PartRFQ

SC110KR

Mallory Sonalert Products Inc.In Stock: 1153SC110KR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SC110K is determined by strict equivalence across the following critical parameters:

• Voltage Range: Must support 30–120V AC/DC operation
• Frequency: Must produce 2.9kHz output
• Sound Pressure Level: Must deliver 70dB SPL @ 30V, 61cm
• Current Supply: Must operate within 6–22mA range
• Mounting Configuration: Must support panel mount with screw terminal and quick connect tab termination
• Physical Dimensions: Must match 1.687" diameter (42.85mm) and 1.399" maximum seated height (35.54mm)
• Operating Temperature Range: Must function across –30°C to 65°C
• Driver Type: Must be internally driven piezo indicator

The SC110KR qualifies as a direct substitute because it maintains identical electrical performance, mechanical compatibility, and operational specifications across all critical parameters. Differences in regulatory compliance (additional UL approval and RoHS3 compliance status) do not affect functional substitution.

Parameter Comparison

Engineering Selection Recommendations

The SC110K and SC110KR are functionally equivalent components within the SC series of internally driven piezo buzzers. Both parts maintain Active product status and are manufactured by Mallory Sonalert Products Inc.

The SC110KR offers enhanced regulatory compliance, carrying both cUL and UL approvals compared to the SC110K's cUL-only certification. Additionally, the SC110KR is RoHS3 compliant, whereas the SC110K is RoHS non-compliant. These compliance differences may influence selection based on application requirements and regional regulatory mandates, but do not affect electrical or mechanical performance.

Both parts are suitable for direct substitution in panel mount applications requiring 30–120V AC/DC operation, 2.9kHz piezo indication, and 70dB SPL output. Inventory availability should be considered: SC110K has 785 units in stock, while SC110KR has 1100 units in stock.

Frequently Asked Questions (FAQ)

Q: Can SC110KR replace SC110K in existing designs? A: Yes. The SC110KR is a direct functional equivalent with identical electrical performance, frequency response, sound pressure level, current consumption, and mechanical dimensions. No circuit or mechanical modifications are required.

Q: What are the key differences between SC110K and SC110KR? A: The primary differences are regulatory compliance and RoHS status. SC110KR carries UL and cUL approvals with RoHS3 compliance, while SC110K carries cUL approval only and is RoHS non-compliant. Electrical and mechanical specifications are identical.

Q: Are the mounting dimensions identical? A: Yes. Both parts feature 1.687" diameter (42.85mm) panel mount configuration with 1.399" maximum seated height (35.54mm). Termination is identical: screw terminal with quick connect tab – 0.250" (6.35mm).

Q: What voltage range do these buzzers support? A: Both SC110K and SC110KR operate across 30–120V for AC and DC input types, with current consumption of 6–22mA.

Q: What is the operating frequency and sound output? A: Both parts produce a 2.9kHz tone at 70dB SPL measured at 30V, 61cm distance, operating in pulse and short modes with 0.5–1.2 PPS duration.

Q: What is the operating temperature range? A: Both parts operate reliably across –30°C to 65°C ambient temperature.

Q: Which part should I select for new designs? A: Selection should be based on regulatory requirements. For applications requiring UL certification or RoHS3 compliance, specify SC110KR. For applications with cUL-only requirements, either part is suitable based on availability and lead time.