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Replacement of Mechanical Relays
Motor Control & Power Control
Aircraft Flight Control Systems
A.T.E (Automatic Test Equipment)
Load Control From Processor I/O Ports
Power Supply Circuits
Medical Electronics
Description:
The DIH-137 is a State-of-the-Art Photovoltaic Solid State Relay designed for 28V AC-DC Aircraft power applications
where package space-efficiency and high reliability are critical.
Each package contains two independent N/C relays, with separate LED inputs and optically isolated power MOSFET
outputs. The Normally Closed (N/C) outputs are able to operate AC or DC.
Each relay, A or B, is capable of carrying 150mA DC continuous current and 250mA DC peak current. Each LED
optically couples to a Photovoltaic (PV) IC chip which responds by generating a voltage. This voltage is internally
connected to the Gate and Source terminals of the output MOSFETs, thus controlling their current. The DIH-137 is also
available screened to military specifications, as required.
Pin Designations
Relay A
Relay B
Input +
Input +
1
5
Input -
Input -
2
6
Output
Output
3
7
Output
Output
4
8
*
Package Layout:
Weight 1.5 Grams
0.780 Max
.
0.120 Max
.
* DIH-137 Equivalent Circuit
DIONICS INC
.
DIH-137
A-4 ; B-8
0.040
xxxx
0.270 Max.
A-1; B-5
100 Ohms
Turn-off
Circuit
Dep.
R
0.300 Min
.
0.020
LED
A-2 ; B-6
PV
Dep.
A-3 ; B-7
0.100
0.046 Typ
.
0.010
12/2001
1
2
