Relays and Contactors


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Delay-on-Break Timing Relays KRDB, KSDB, TDUB Series

Delay-on-Break Timing Relays


The SSAC KRDB Series is a compact time delay relay measuring only 2 in. (50.8 mm) square. Its microcontroller timing circuit provides excellent repeat accuracy and stability. Encapsulation protects against shock, vibration, and humidity. The KRDB Series is a cost effective approach for OEM applications that require small size, isolation, reliability, and long life. The KSDB is designed for general purpose commercial and industrial applications where a small, cost effective, reliable solid-state timer is required. The factory calibration for fixed time delays is within 5% of the target time delay. The repeat accuracy, under stable conditions, is 0.5% of the selected time delay. This series is designed for popular AC and DC voltages. Time delays of 0.1 seconds to 1000 minutes are available in 6 ranges. The output is rated 1A steady and 10A inrush. The modules are totally solid state and encapsulated to protect the electronic circuitry. The TDUB Series combines digital timing circuitry with universal voltage operation. Voltages of 24 to 240VAC and 12 to 24VDC are available in three ranges. The TDUB Series offers DIP switch selectable time delays ranging from 0.1 seconds to 102.3 minutes in three ranges. Its 1A rated output, ability to operate on multiple voltages, and wide range of switch selectable time delays make the TDUB Series an excellent choice for process control systems and OEM equipment.


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QtyModelDescriptionIn StockList PriceInternet Price
KRDB421 DOB 120VAC, 10A RLY, ADJ 1-100 SECONDINFO185.00103.60
KSDB431 DOB 120VAC, 1A SOLID STATE, ADJ 1-100 SECINFO136.0076.16
TDUB3000A DOB 24-120AC, 1A SLD STATE, ADJ 1-1023 SECIn Stock213.00119.28


No accessories found
  • Onboard adjustment knob
  • 1A solid state or Isolated 10A output
  • Compact 2″ x 2″ sizing
  • Wide voltage and timing ranges

Operating Temperature:-40° to 140℉ (-40° to 60℃)

Storage Temperature:

KRDB/TDUB:-40° to 185℉ (-40° to 85℃)

KSDB:-40° to 176℉ (-40° to 80℃)

Operating Humidity:95% RH non-condensing

Mounting:Surface mount with one #10 screw

Dimensions:2″W x 2″H x 1.21″D (5.08 x 5.08 x 3.07 cm)

Approvals:CE, CSA, UR File #E57310

Warranty:10 years