1JS51-1 Solid Time Delay Relay

  • The product is a 1-way output of two-stage delay relays, mainly used for aerospace models of blunt-sensitive pyrotechnics control, and the output is a common power positive type. After the first-level delay, the circuit is turned on to delay the detonation of the pyrotechnics; the second-stage delay closes the circuit after maintaining sufficient detonation time, which can avoid unnecessary consumption of power by the pyrotechnic electric bridge wire. According to strong anti-interference and harsh environment characteristic, it can be used for other time program control of aerospace, aviation and ground equipment.


1JS51-1 Solid Time Delay Relays

Environmental Characteristics


Item Environmental conditions


Quality Grade Military (Ⓙ) Aerospace (CAST)


Ambient temperature -55 °C ~ 125 °C


Low air pressure 0.67 kPa~0.27 kPa 11.59 kPa


Sinusoidal vibration 10 Hz~2000 Hz, 196 m2/s

10 Hz~3000 Hz, 196 m2/s

5 Random Vibration —–

30 (m/s2)2/Hz

6 Shock

735 m/s2, 6ms

7 Constant acceleration

735 m/s2

Order mark

RY4.546.060JT: 1JS51-1/28

Note: The accuracy of the delay and the installation method should be stated when ordering.

CASTPS06/037A-2008: 1JS51-1-28 X t1t2 Z1

Note: The accuracy of the delay and the installation method should be stated when ordering.

Main Specifications

Delay type

Type 5 (user defined) Output form 1 group normally open

Operating voltage range

18 VDC~32 VDC Rated load 28 VDC, 1A (resistive)

Rated operating voltage

28 VDC Life time 1 × 106 cycles or 50h

Delay range

Military t1: 0.05s~500s

t2: 0.03s~30s

Dielectric withstand voltage 250 Vr.m.s., 60s, 1mA


t1: 0.05s~500s

t2: 0.03s~500s

Input current

12mA Insulation resistance

1000 MΩ, 500 VDC

Recycling Time Military ≥50 ms Leak rate Military

≤1×10-1 Pa.cm3/s

Aerospace ≥4 s Aerospace

≤1×10-2 Pa.cm3/s

Power supply instantaneous power off Military 50 μs Weight

≤12 g

Aerospace 200 μs Dimensions


Delay accuracy ±2 % Mounting method

A(0), C1(1), C(2), B(3)


Mechanical drawings

Installation method 0 Installation method 1
Installation method 2 Installation method 3


Timing Diagram
Circuit drawing Output Current vs. temperature