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)
 
Specs
- 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
 
IMPORTANT NOTE FOR HORNBY SELECT AND ELITE USERS:  This decoder WILL NOT WORK with your controller.  It seems the controller doesn't supply a clean enough signal, so the Bachmann decoder shuts down as a safety consideration as it assumes there is interference.
 
POSTAGE DISCOUNT:
If buying only one decoder (and no other items in the order), reduce your UK postage by £1.70 by going through our main checkout and using the voucher code JUSTONEDECODER
Rules apply: (1) only valid if used on main checkout, not Paypal express button from basket page. (2) only valid on orders totalling under £40 before postage.  (3) if used on any order that doesn't just contain a decoder or decoder and cabling, order will be refunded and cancelled.  (4) if used on an order for decoders that totals over £40, order will be cancelled. (5) cannot be applied later or refunded later, must be used at checkout. Please act fair and save, as it costs us a lot less to post ONE decoder than multiple or bulkier items.