SMT-831-2 Equivalent & Substitute Parts

Part Overview

The SMT-831-2 is an externally driven electromechanical magnetic buzzer manufactured by PUI Audio, Inc., designed for surface mount applications with a rated voltage of 1.5V and operating frequency of 2.7kHz. This component is classified as obsolete, making identification of compatible substitute parts essential for ongoing design support and production continuity. The SMT-831-2 features a compact 11.00mm x 14.00mm footprint with a maximum seated height of 4.60mm, suitable for space-constrained applications requiring audible signaling.

Substiute Parts

SMT-831-2

PUI Audio, Inc.In Stock: 1124SMT-831-2 Datasheet

Current PartRFQ

SMT-1427-S-2-R

PUI Audio, Inc.In Stock: 1805SMT-1427-S-2-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The SMT-1427-S-2-R qualifies as a direct substitute for the SMT-831-2 based on the following critical parameters:

• Identical rated voltage: 1.5V
• Identical operating frequency: 2.7kHz
• Identical physical dimensions: 11.00mm x 14.00mm
• Identical maximum seated height: 4.60mm
• Identical mounting type: Surface Mount
• Identical termination method: Solder Pads
• Identical driver circuitry: Transducer, Externally Driven
• Identical input type: Zero-Peak Signal
• Identical technology: Electromechanical/Magnetic
• Identical manufacturer: PUI Audio, Inc.
• Same series designation: SMT

The SMT-1427-S-2-R is an active product with enhanced specifications including defined voltage range (1.2V ~ 1.7V), specified current supply (80mA), sound pressure level (85dB @ 1.5V, 10cm), operating temperature range (-40°C ~ 85°C), and RoHS3 compliance, providing superior environmental and regulatory positioning compared to the obsolete SMT-831-2.

Parameter Comparison

Engineering Selection Recommendations

The SMT-1427-S-2-R is the direct substitute for the obsolete SMT-831-2. Both components share identical electrical and mechanical specifications, ensuring form-fit-function compatibility in existing designs. The SMT-1427-S-2-R offers the additional advantage of active product status with RoHS3 compliance, meeting current environmental and regulatory requirements. For applications requiring RoHS compliance or long-term supply assurance, the SMT-1427-S-2-R is the appropriate selection. The component is available in Tape & Reel packaging, suitable for automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the SMT-1427-S-2-R directly replace the SMT-831-2 in existing PCB designs?

A: Yes. Both components have identical physical dimensions (11.00mm x 14.00mm), maximum seated height (4.60mm), solder pad termination, and electrical specifications (1.5V rated voltage, 2.7kHz frequency). No PCB layout modifications are required.

Q: What is the primary difference between these two parts?

A: The SMT-831-2 is obsolete with limited technical specifications, while the SMT-1427-S-2-R is an active product with fully defined electrical parameters including voltage range (1.2V ~ 1.7V), current supply (80mA), sound pressure level (85dB @ 1.5V, 10cm), and operating temperature range (-40°C ~ 85°C). Additionally, the SMT-1427-S-2-R is RoHS3 compliant.

Q: Are there packaging differences between these parts?

A: The SMT-831-2 packaging is not specified in available documentation. The SMT-1427-S-2-R is supplied in Tape & Reel (TR) format, standard for automated surface mount assembly.

Q: Does the SMT-1427-S-2-R meet RoHS requirements?

A: Yes. The SMT-1427-S-2-R is RoHS3 compliant, whereas the SMT-831-2 is RoHS non-compliant. This makes the SMT-1427-S-2-R suitable for applications subject to RoHS directives.

Q: What is the operating temperature range for the SMT-1427-S-2-R?

A: The SMT-1427-S-2-R operates across -40°C to 85°C. The SMT-831-2 operating temperature range is not specified.

Q: Are both components from the same manufacturer?

A: Yes. Both the SMT-831-2 and SMT-1427-S-2-R are manufactured by PUI Audio, Inc., and belong to the SMT series.