Märklin 60978 mSD3 Sound Decoder, 21-Pin MTC, mfx/DCC/MM, Children's Locomotive Sound Set, 8 Ohm Speaker Included

Model railway sound decoder delivering immersive children's locomotive audio with up to 32 independent sound functions. The Märklin mSD3 transforms H0 locomotives with automatic mfx registration, high-efficiency motor control, and a compact 8-ohm speaker for rich, realistic sound.

Advantages

This decoder combines advanced digital protocols (mfx, DCC, Motorola) with a dedicated children's sound theme, offering playful driving sounds, horn, bell, and announcements. Its 21-pin MTC interface ensures broad compatibility, while the integrated power pack connection maintains stable operation over dirty track sections.

Suitable for

• Märklin H0 locomotives with 21-pin MTC interface
• Model railroaders seeking child-friendly sound themes
• Users of Märklin Central Station for easy updates
• Layouts requiring reliable motor and function control

Key specifications

• Decoder type: Märklin SoundDecoder mSD3
• Interface: 21-pin MTC (NEM 660)
• Digital protocols: mfx, DCC, Motorola (MM)
• Sound functions: up to 32 individually controllable
• Speaker: included, 8 Ohm with sound capsule
• Auxiliary functions: up to 8 independent outputs
• Total current: max. 1.1 A; function output: max. 180 mA
• Load regulation: advanced for smooth running
• Software updates: via Märklin Central Station
• Power pack connection: yes (buffer capacitor)
• Recommended age: 15 years and up

Recommendations

For a complete setup, pair with a Märklin Central Station to unlock automatic registration and sound customization. Ensure your locomotive has a 21-pin MTC socket and sufficient space for the speaker capsule.