Stk411-210e Datasheet -

There is no direct pin-compatible replacement, but you can substitute with:

A drop-in replacement is not recommended unless you verify the complete schematic.

These values represent typical performance from the original datasheet.

| Parameter | Conditions | Min | Typ | Max | Unit | |-------------------------------|-------------------------------|------|------|------|------| | Quiescent Current (Total) | Vin = 0 | - | 80 | 120 | mA | | Output Power | THD = 10% | 40 | 45 | - | W/ch | | Output Power | THD = 0.4% | - | 30 | - | W/ch | | Total Harmonic Distortion | Po = 1W, f = 1 kHz | - | 0.08 | 0.2 | % | | Voltage Gain | Open loop | - | 55 | - | dB | | Closed-loop voltage gain | Feedback configured | - | 30 | - | dB | | Input Impedance | Non-inverting input | 30 | 50 | - | kΩ | | Output Offset Voltage | VIN = 0 | - | ±20 | ±100 | mV | | S/N Ratio | Po = 1W, A-weighted | - | 100 | - | dB | | Frequency Response | +0, –3 dB | 20 | - | 50k | Hz |

In summary – The STK411-210E datasheet “story” is a ghost: a once-common part lost to time, where only the base STK411-210 specs survive. If you need to service an old stereo using that module, treat it as an STK411-210 and verify with a curve tracer or low-voltage test before powering up. Stk411-210e Datasheet

STK411-210E is a thick-film hybrid integrated circuit (IC) manufactured by

(now part of Panasonic). It is primarily designed as a dual-channel AF power amplifier for high-fidelity audio applications, home theaters, and industrial motor drives. Key Specifications & Features Application : Medium-power audio amplification and motor control. Package Type (Zig-zag In-line Package). Operating Temperature : Specified for an extended range of -40°C to 105°C Thermal Stability

: Features built-in protection mechanisms and high thermal resilience. Compliance : Lead-free and RoHS compliant. Electrical Characteristics

While the exact per-channel wattage for the "210E" variant is often found in the full datasheet, the STK411 series generally covers an output range of 6W to 100W per channel There is no direct pin-compatible replacement, but you

with a typical Total Harmonic Distortion (THD) of 0.08% to 0.4%. Power Supply : Designed for split/dual power supply configurations. Voltage Rails : Typically compatible with 12V to 24V rails in standard designs. Pin Compatibility

: Pin-compatible with other members of the STK411 series (like STK411-220E or -240E), allowing for easy power scaling in existing PCB layouts. Sourcing & Documentation

The STK411-210E is an older component, often categorized as obsolete or "hard-to-find," but remains available through specialized distributors: Datasheet Access : You can view or download the full technical PDF on ALLDATASHEET Datasheet4U Purchasing : Available from distributors like Veswin Electronics Jotrin Electronics Further Exploration

Review detailed user insights on the STK411 series performance in audio projects at AliExpress A drop-in replacement is not recommended unless you

Access technical diagrams and pinout charts for the broader STK411 family on

Restorers frequently encounter these issues with STK411-210E modules:

Despite its moderate power rating, the STK411-210E requires a properly sized heatsink to prevent thermal shutdown or damage.

Practical advice: Reuse a heatsink from a vintage amplifier rated for 50W/channel. Mount the STK module with thermal grease directly on the metal backside (no insulator needed).

Without a direct datasheet or more context: