Bachmann 36-557A

21 Pin DCC Loco-Decoder (with Brake Button function)

Manufacturer catalogue image - please note that pre-release images may be CAD renders or CGI images rather than photographs

Manufacturer description

A 21 Pin (21MTC) DCC Decoder suitable for models fitted with a 21 Pin DCC decoder socket (do not use with the Bachmann Branchline Class 90 – use 36-569A with these models).

This decoder replaces item No. 36-557 and can be used in any model for which item No. 36-557 is recommended

Highlights include:

Dual-mode DCC/DC decoder with Back EMF function

10 powered function outputs (+8 logic level outputs and 2 logic level/SUSI outputs)

1.5A continuous load

RailComPlus® for automatic registration when used with selected DCC systems

Suitable for models equipped with DC motors (including coreless motors)

Brake Button function for realistic control of braking (operates on F2)

Operating Modes

NMRA/DCC with 14, 28 and 128 speed steps

Short and Long addresses

DCC and DC operation (DC operation is de-selectable)

Automatic recognition of operational mode and DCC speed step selection

Supports Lenz® LG 100 braking sections

Supports ABC braking sections

Motor Control Features

Suitable for models equipped with DC motors (including coreless motors)

1.5A continuous load

Motor regulation with pulse width frequency from 10kHz to 50kHz

Motor output overload protection; Back EMF (de-selectable)

Function Outputs

10 powered function outputs with overload protection (4 via 21MTC pins, 6 via solder pads)

10 logic level outputs (8 via 21MTC pins, 2 via solder pads)

250mA load per output

500mA total load of all function outputs

2 additional logic outputs

Shunting speed and momentum key selectable

Brake Button function for realistic control of braking (operates on F2)

Dimensions

21.4mm x 15.5mm x 4.5mm

Default Address

Address 3

Programming

DCC Service Mode & DCC PoM (Programming on Main)

Additional Features

RailCom® Feedback system

RailComPlus® automatic Registration

This decoder is manufactured on behalf of Bachmann Europe by ESU. For full technical specifications and instructions, please refer to the ESU user guide for Lokpilot 5 DCC 59629 at https://www.esu.eu/en/downloads/instruction-manuals/digital-decoders/

Catalogue listing

Bachmann 21 Pin DCC Loco‑Decoder, part number 36‑557A, is a dual‑mode DCC/DC decoder designed for models that have a 21‑pin decoder socket. It replaces the earlier item 36‑557 and must not be fitted to the Bachmann Branchline Class 90, for which part 36‑569A is required.

Key features include a back‑EMF function, ten powered function outputs (four via the 21‑pin connector and six via solder pads) with overload protection, and eight logic‑level outputs plus two additional logic/SUSI outputs. The decoder can supply a continuous load of 1.5 A, offers RailComPlus automatic registration with compatible DCC systems, and provides a Brake Button function operating on F2 for realistic braking control. It supports NMRA/DCC with 14, 28 and 128 speed steps, short and long addresses, and can be switched between DCC and DC operation (DC can be de‑selected).

The unit measures 21.4 mm × 15.5 mm × 4.5 mm, defaults to address 3 and can be programmed in DCC service mode or via DCC PoM (Programming on Main). It is manufactured by ESU on behalf of Bachmann Europe; full specifications are available in the ESU Lokpilot 5 DCC user guide (document 59629).