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ROHM Semiconductor BA3121F-E2 — Analog & Data Acquisition

BA3121F-E2 Class AB Stereo Amplifier, 8-SOP, Active

MPNBA3121F-E2
End of Life

ROHM BA3121F-, Class AB stereo audio amplifier IC, 2-channel output, 4V to 18V supply, -30°C to 85°C, 8-SOP surface-mount package.

$1.58Ref. price · indicative, final on quote
ROHM Semiconductor BA3121F-E2 datasheet (PDF)
Packaging8-SOIC (0.173", 4.40mm Width)
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

BA3121F-E2 specifications
ParameterValue
TypeClass AB
Output type2-Channel (Stereo)
MountingSurface Mount
Supply voltage4V ~ 18V
Operating temperature-30°C ~ 85°C (TA)
PackageTape & Reel (TR); Cut Tape (CT)
Case8-SOIC (0.173\", 4.40mm Width)

Product details

Class AB stereo line driver in 8-SOP

The BA3121F-E2: The BA3121F- is a Class AB stereo audio amplifier IC with two output channels in an 8-SOP surface-mount package. It operates from a 4 V to 18 V supply rail.

Supply range and thermal headroom

Class AB topology means linear dissipation: at 18 V supply and moderate output current, the 8-SOP package's thermal impedance limits continuous power. The wide 4 V to 18 V window lets a single BOM line serve 5 V and 12 V product variants — no separate regulator needed. For higher output power (9 W class), the BD28412MUV- Class D alternative trades linearity for efficiency.

Frequently asked questions

What is the closest functional second-source for BA3121F-?

The BH3547F- is a Class AB stereo amplifier in a similar package, adding mute and thermal protection. Its supply voltage is 4.5 V (nominal) and temperature range -25°C to 75°C — check these against your design before substituting.