Timer relais

TDBE4-U200N relay - Delay-on & delay-off, 4 pole



Plug-in electronic railway timer relay with three change-over
contacts and one normally-closed contact, for reliable
switching of very low currents (1 mA @5 VDC) up to
currents of 10A @ 110VDC. The relay has a delay-on and
delay-off function. The delay times are independently
adjustable with two lockable knobs. The relay can also be
supplied with one or two fixed delay times (one knob or
none). The relay needs an auxiliary supply and can be
activated by an external N/O contact or supply voltage.
The relay is equipped with two LEDs which indicate the
presence of power supply and the energizing of the coil.
The built-in magnetic arc blow-out ensures adequate DC
breaking capacity resulting in long contact life. The
integrated contact separation prevents cross pollution of
contacts. On the relay cover the serial number and data
matrix code are shown for ease of traceability.
The construction of the relay and choice of materials
makes the TDBE4-U200N relay suitable to withstand low
and high temperatures, shock & vibration and dry to humid
No external retaining clip needed as integrated ‘snap-lock’
will hold relay into socket under all circumstances and
mounting orientations.
Compact design, choice of many options and a wide range
of sockets makes the TDBE4-U200N relay an easy and
flexible solution to use.


The TDBE4-U200N is used in applications where a delay on
pull-in and on drop-out is necessary. Relays continue to play
a vital role in reliable train operation. Key functions are galvanic
isolation between control (computers/ PLC’s) and power circuits
providing system isolation, contact multiplication and
Other unique features are:
  • predictable failure behavior (Fail Safe) making system
  • safety validation a lot more simple than using computer based solutions like PLC’s
  • long term availability (no obsolescence)
  • easy maintenance by plug-in feature and transparent cover
  • unlike more sensitive electronics, relays are insensitive to EMI
Using these features one can build a hardwired, fail safe control
system which is cyber secure and insensitive to electro
magnetic disturbances and surges. Relays are ideal to use in
trains for signal transfer/repeat, safety interlocking functions
brake - doors), load on-off switching and sub-system isolation.


  • Time delay relay, delay on pull-in and on drop-out
  • Auxiliary power supply necessary
  • Compact plug-in design
  • 3 C/O contacts and 1 N/C contact
  • Both delay times independently adjustable with 2 lockable knobs
  • Also available with 1 or 2 fixed time delays (1 knob or none)
  • Total time delay range: 0 s...120 min
  • Magnetic arc blow-out ensuring long contact life
  • Two LEDs for status indication, red or green
  • Minimum switching current 1 mA
  • Maximum continuous current 10 A
  • Wide temperature range -40 ⁰C...+70 ⁰C
  • Mechanical life > 30 million operations
  • Electrical life e.g. > 10 million operations at 0.5 A, 24 VDC
  • Data matrix code with serial number for traceability
  • Integrated snaplock, no external retaining clip needed
  • Transparent cover for visual inspection
  • Many options and sockets available

Railway compliancy

  • EN 50155 : 2017 Railway applications - Rolling stock - Electronic equipment
  • IEC 60571: 2012 Railway applications - Electronic equipment used on rolling stock
  • IEC 60947-5-1: 2016 / IEC 60947-5-4: 2012 Low-voltage switchgear and controlgear
  • IEC 61373: 2010 Railway applications - Rolling stock equipment - Shock and vibration tests
  • EN 50121-3-2: 2016 Railway applications - Electromagnetic compatibility
  • NF F16-101/102 Railway rolling stock - Fire behavior
  • EN 45545-2: 2015 Railway applications - Fire protection on railway vehicles Part 2: Requirements for fire behavior of materials and components



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