BA3121 Equivalent & Substitute Parts Reference

Part Overview

Rohm Semiconductor BA3121 is a Class AB stereo linear amplifier integrated circuit, housed in an 8-DIP through-hole package. Its typical use case is in audio applications requiring 2-channel (stereo) amplification within a supply voltage range of 4V to 18V. The product is classified as obsolete, necessitating the identification of equivalent or substitute models for ongoing design maintenance, production continuity, or repair requirements.

Substiute Parts

BA3121

Rohm SemiconductorIn Stock: 1881BA3121 Datasheet

Current PartRFQ

BA3121F-E2

Rohm SemiconductorIn Stock: 26669BA3121F-E2 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute selection for the BA3121 is determined by the following key parameters: manufacturer part number, amplifier type (Class AB), output type (2-Channel Stereo), supply voltage range (4V ~ 18V), operating temperature (-30°C ~ 85°C), and compliance attributes (RoHS, MSL, REACH, ECCN). Package type and mounting method are also included, as physical compatibility may be required for drop-in replacement or board modifications.

Parameter Comparison

Engineering Selection Recommendations

The main part, BA3121, is obsolete, while BA3121F-E2 is an active substitute. Both parts share the same electrical operating characteristics, compliance status (ROHS3, REACH Unaffected), and ECCN designation. Moisture Sensitivity Level is 1 (Unlimited) for both, ensuring unrestrictive storage and handling requirements. Package type and mounting method differ (through hole vs. surface mount), which must be considered for mechanical compatibility.

Frequently Asked Questions (FAQ)

Q1: What are the critical parameters when substituting BA3121 with BA3121F-E2?
A1: Critical parameters include amplifier type (Class AB), output type (2-Channel Stereo), supply voltage range (4V ~ 18V), operating temperature (-30°C ~ 85°C), and compliance attributes (RoHS, MSL, REACH, ECCN).

Q2: Are the BA3121 and BA3121F-E2 footprint- or package-compatible?
A2: No. BA3121 uses an 8-DIP through-hole package, while BA3121F-E2 uses an 8-SOP/8-SOIC surface mount package. Mechanical and PCB layout considerations are required for substitution.

Q3: Does the substitute part BA3121F-E2 meet current RoHS and REACH standards?
A3: Yes. Both BA3121 and BA3121F-E2 are ROHS3 Compliant and REACH Unaffected.

Q4: Is there any difference in operating temperature or electrical supply range between these models?
A4: No. Both models operate from -30°C to 85°C and support a supply voltage range of 4V to 18V.

Q5: What should be considered regarding mounting type when substituting BA3121 with BA3121F-E2?
A5: BA3121 is through-hole, while BA3121F-E2 is surface mount. The mounting type affects PCB design and assembly processes.