Relays and Contactors


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Magnecraft Time Delay Relays 821TD10H, TDRSOXP, TDRSRXP

Magnecraft Time Delay Relays


The Magnecraft 821TD10H, TDRSOXP, and TDRSRXP Time Delay Relays are adjustable time delay relays available with various timing functions. The 821TD10H is a DIN rail mounted time delay relay offering multiple timing functions, multiple timing scales, and universal voltage input. The TDRSOXP and TDRSRXP are dual function, low cost time delay relays used with DIN/surface mount sockets. All are proven performers in Building Automation Systems, BAS.


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QtyModelDescriptionIn StockList PriceInternet Price
821TD10H-UNI TDR, 12-240VAC/DC, MULTI-FUNCTION, DINIn Stock220.50123.48
822TD10HUNI TDR, 12-240VAC/DC, MULTI-FUNCTION, DIN DPDTIn Stock379.50212.52
861SSR210-DC-1 10 A 3-32VDC OUT 24-280VAC SPST-NO DIN MOUNTIn Stock124.3069.61


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  • Adjustable timing ranges from 0.1 second to 10 days (821TD10H)
  • Selectable timing functions
  • Indication LEDs show power, timing (821TD10H) and relay energized
  • The compact model 821TD10H DIN rail mounts without a socket
  • Models TDRSOXP and TDRSRXP DIN rail or surface mount with industry standard sockets

Coil Rating:

 :821 12 to 240 VAC/VDC (-15%, + 10%), 3 VA

 :TDR 12/24/120 VAC/VDC (-20%, +10%), 5 VA

Relay Type:

 :821 SPDT

 :TDR, 822 DPDT

Contact Rating:

 :821 15A @ 240 VAC, 15A @ 24 VDC (resistive)

 :TDR 12A @ 240 VAC, 12A @ 24 VDC (resistive)

Input Pulse Time:50 ms minimum; 821, SRXP only

Minimum Load:100 mA

Transient Protection:Yes

Contact Material:Silver alloy

Electrical Life:

 :821 70,000 operations @ full load

 :TDR 100,000 operations @ full load

Reverse Polarity:Protected

Wire Size:

 :821 14 AWG maximum

 :TDR 20-12 AWG with socket

Mechanical Life:10 million operations @ no load

Setting Error:

 :821, 822 ±5% of mechanical setting

 :TDR ±10% of mechanical setting

Time Delay Adjust:Potentiometer, Removeable knob

Time Range:

 :821, 822 0.1 sec to 10 days

 :TDR 0.1 sec to 10 hours


Reset Time:150 ms maximum

Timing Functions:On-delay, interval, Off-delay, One-shot, Repeat cycle, Pulse, On and Off-delay, Retriggerable memory latch, On-delay, interval , Off-delay, one-shot, On-delay, interval

LED Indication:Green Input Red Blinks = timing, on = energized

Operating Temperature:-4° to 131°F (-20° to 55°C)


 :821 DIN rail/surface mount

 :TDR DIN rail/surface mount socket


 :TDRSOXP w/socket 2.02" x 1.6" x 0.83" (5.1 x 4.1 x 2.1 cm)

 :TDRSRXP w/socket 2.05" x 2.32" x 0.97" (5.2 x 5.0 x 2.5 cm)

 :821TD10H 3.5" x 0.69" x 2.55" (9 x 1.8 x 6.5 cm)

TDRSOXP/TDRSRSP:1.73" x 1.42" x 2.8" (4.5 x 3.6 x 7.1 cm)


 :821 UL File E234203, RoHS

 :TDR UL File E43641, RoHS


 :821 0.1 lb (0.05 Kg)

 :TDR 0.3 lb (0.13 Kg)

Warranty:1 year


Download Additional Data

document   Catalog Page
document   TDRSRX_TDRSOX Datasheet
document   821TD10H Datasheet