TDH-8080/8081
ENGINEERING DATA SHEET
ON RELEASE-ADJUSTABLE PERIOD
2 PDT, 10 AMP
FEATURES
q
q
q
q
q
Small size and weight
High-reliability design
Hermetically sealed
High transient immunity
Reverse Polarity Protection
PRINCIPLE TECHNICAL CHARACTERISTICS
Seal:Hermetic Tested per MIL-STD-883,
1x10
-8
atm, cm
3
/s max
Method 1014 Condition B, C
leakage
Finish: per MIL-T-10727
Terminals:
TDH 8081 (Tin Plate)
TDH 8080 (Gold Plate)
Weight
Tin Plate
Solder-lug
Plug-In
2.5 Ounce max.
APPLICATION NOTE:
101
APPLICABLE SOCKET:
SO-1048-8308
DESCRIPTION
The TDH-8080/81 Time Delay Relays have been designed with thick film hybrid microelectronics timing circuits
and MIL-R-6106 relays, packaged in a hermetically sealed military style enclosure. The TDH-8080/81 series are
qualified to MIL-PRF-83726/31 and designed to withstand severe environmental conditions encountered in
military/aerospace applications. These relays are suited for use in power control, communication circuits and
many other applications where power switching and high reliability are required over a wide temperature range.
North America
6900 Orangethorpe Ave.
P.O. Box 5032
Buena Park, CA 90622 USA
Europe, SA
2 Rue Goethe
57430 Sarralbe
France
Tel: (33) 3 87 97 98 97
Fax: (33) 3 87 97 84 04
Asia-Pacific Ltd.
20/F Shing Hing Commercial Bldg.
21-27 Wing Kut Street
Central, Hong Kong
Tel: (852) 2 191 2886
Fax: (852) 2 389 5803
www.leachintl.com
Tel: (01) 714-736-7599
Fax: (01) 714-670-1145
Data sheets are for initial product selection and comparison. Contact Leach International prior to choosing a component.
Date of issue: 3/06
- 70 -
Page 1 of 3
ELECTRICAL SPECIFICATION
Input (Control) Parameters
Timing:
a. Operation, Time Delay on
b. Method
c. Range
d. Accuracy
Recycle Time
Operations: (X1-X2)
a. Input & Control Voltage
b. Operating Current
c. Control Current
Transients:
a. Positive, MIL-STD-704A, Figure9, Limit 1
b. Spike, MIL-STD-704A, 0-10 µs
c. Self-Generated
d. Susceptibility
Electromagnetic Interference Per MIL-STD-461A
Power Loss
TDH-8080/8081
Release
Adjustable Period
0.1 to 600 Seconds [6]
±10% [1]
50 ms, Max [5]
20-30 Vdc
150 mA, Max @ 25° C
15 mA, Max @ 25° C
+80 Volts Max
±600 Volts Max
±50 Volts Max
+80; -600 Volts Max
Class 1D [3]
500 Microseconds [2]
Output (Load) Parameters
Contact Form
Contact Rating:
a. Resistive
b. Inductive
c. Motor
d. Lamp
Dielectric Strength:
a. @ Sea Level, 60 Hz
b. @ 80,000 ft., 60 Hz
Insulation Resistance @ 500 Vdc
2 PDT
10 Amperes
8 Amperes
4 Amperes
2 Amperes
1000 Vrms [4]
350 Vrms
1000 M
Ω
[4]
GENERAL CHARACTERISTICS
Ambient Temperatures Range:
a. Operating
b. Non-Operating
Vibration:
a. Sinusoidal, 10-3000 Hz
b. Random: 50-2000 Hz, MIL-STD-810
Shock @ 6 ± 1 MS, 1/2 Sine, 3 Axis
Acceleration, in any Axis
Life at Rated Resistive Load; Minimum
30 G
0.4 G
2
/Hz
100 G
15 G
100,000 operations
-55 to +125° C
-65 to +125° C
NUMBERING SYSTEM
Plug-in Terminal
TDH-8080 - 1001
|
|
1
3
M83726/31 - 1001
|
|
|
1
2
3
P
|
4
P
|
4
Solder Hook Terminal
TDH-8081 - 1001 S
|
|
|
1
3
4
M83726/31 - 1001 S
|
|
|
|
1
2
3
4
1.
Model Number or Basic "MIL-PRF" Series
number.
2.
Pin Style or Military "Slash" number.
3.
Timing Range, Fixed: 100 milliseconds to 600
seconds. (See Note 6).
4.
Mounting style and quality level (See Note 7).
P = Plug-in terminal.
S = Solder hook terminal.
Date of issue: 3/06
- 71 -
Page 2 of 3
MECHANICAL SPECIFICATIONS
EXTERNAL
RESISTOR
1.718 MAX
1.446
1.396
1.025 MAX
.15
TDH-8080/8081
1 -X2 2
CONTROL
NAMEPLATE
(NEAR SIDE)
3
D
C
.93
1.025
MAX
.51
TD
.62
1.010
MAX
.04
B
+X1
A
.20
.156±.005
FULL
RADIUS
SEE DETAIL
VIEW A AND B
CAGE NO. AND
DATA CODE
(FAR SIDE)
EVACUATION HOLE
PLUG-IN
.05
.27
.30
HOOK PIN
CONTRASTING BEAD
ADJUSTABLE TIME DELAY
20-30 VDC
X1-X2
INPUT
VOLTAGE
20-30 VDC
SILICON RUBBER
GASKET
.062 ± .001 PINS
0 VDC
.062 ± .001 PINS
.080 ID
.200 TYPICAL
.21
30
.21
CONTRASTING
BEAD
.200 TYPICAL
.21
0 VDC
(C1-X2)
CONTROL
CONTRASTING
BEAD
.21
.200 TYPICAL
.200 TYPICAL
ENERGIZED
DE-ENERGIZED
TIME DELAY
DETAIL VIEW A
DETAIL VIEW B
ALL DIMENSIONS SHOWN ARE IN INCHES.
TIME DELAY ON RELEASE
NOTES
[1] The accuracy specification applies for any combination of operating temperature and voltage.
For units with a timing range less than 1 second, add ±10 milliseconds to the ±10% tolerance.
[2] Transient and power loss specification are based on a maximum duty cycle of 1/50.
[3] EMI test limits will not be exceeded during the timing interval or when continuously energized
under steady state conditions, per paragraph 3.23, MIL-R-83726B.
[4] Terminals X1, X2, C1, D1 and D3 must be connected together during the test. Dielectric
withstanding voltage and insulation resistance are measured at sea level between all mutually
insulated terminals and between all terminals and case.
[5] Recycle time is defined as the minimum time power must be applied to the control terminal to
assure that the next timing cycle will be completed within the specified timing tolerance.
(Units can be recycled during timing or after time-out.)
[6] Time delays greater than 500 seconds are not MIL qualified.
A four digit number defines the adjustable time delay range in seconds (or milliseconds).
The first three digits are significant figures, used to define the upper limit of a DECADE RANGE.
The fourth digit represents the number of zeros to follow the first three digits.
SPECIFY STANDARD DECADE RANGE
- 1001 = 0.1 to 1 second (100 to 1,000 milliseconds)
- 1002 = 1.0 to 10 seconds
- 5002 = 5 to 50 seconds
- 5003 = 50 to 500 seconds
An external resistor is used to obtain a specific time delay within the specified decade range.
The formula below provides the proper resistance value to achieve the desired time delay:
T
1
R
ext
= (_____ - 1)
100,000 Ohms
Where:R
ext
= External resistance value (Ohms)
T
0
T
1
= Desired time in seconds
T
0
= Minimum time (low end of the decade range) in seconds.
As an example, if using a 5 to 50 second adjustable timer and a 30 second delay is desired, the
calculation is:
30
R
ext
= (_____ - 1)
100,000 Ohms or R
ext
= 500 K Ohms
5
Recommended resistors IAW MIL-R-55182 1/8 Watt, 1% (RNC60HXXXXFS). External resistor not supplied.
[7] Quality level as specified in MIL-R-83726B, paragraph 3.1.1, 3.1.2 and 3.1.3.
Date of issue: 3/06
- 72 -
Page 3 of 3
Application notes
DERATING OF CONTACTS FOR DC VOLTAGES
ABOVE NOMINAL RATING
N°101
To establish a standard for the derating of relay contacts is, at best, a subjective practice. Limitations are governed by the type
of relay, contact gap, maximum voltage capabilities of the relay contact system, and the contact material.
The most common method is to derate the contacts by use of the Power Formula, using the known current and voltage.
This method is valid only for
Resistive Loads,
and is an approximation only; keeping in mind the limitations mentioned above.
Power = IE (Current x Voltage)
I
2
E
2
= 2/3 I
1
E
1
Example:
A designer is working with a 55 volt DC system and has a relay rated at 10 amps resistive at 28 volts DC.
What is the maximum current that can be switched at 55 Vdc.
I
1
= 10 Amperes
E
1
= 28 VDC
E
2
= 55 VDC
I
2
= ? (Current ratings at 55 VDC Resistive)
I
2
E
2
= 2 I
1
E
1
/3
I
2
= 2 I
1
E
1
/E
2
3
= 2 (10 x 28)/55 x 3
= 560/165
I
2
= 3.4 Amperes at 55VDC
In addition, the user should always be concerned about the following:
1. Derating contacts that are rated for less than 10 Amperes at nominal voltage.
2. Derating contacts for use in system voltages above 130 Volts DC
Date of issue: 6/00
- 14 -
Page 1 of 1
ENGINEERING DATA SHEET
SO-1048-8308/8518
RELAY SOCKET
12 AMP
BASIC SOCKET SERIES DESIGNATION FOR:
Series K
Series TDH-8070, TDH-8080
TDH-8050, TDH-8060, VS400
DESIGNED TO THE STANDARDS AND REQUIREMENTS OF:
MIL-S-12883/40
HARDWARE MOUNTING
SOCKET DRAWING
.200
TYP
3
D
2
X2
1
MOUNTING DETAIL 3 PLACES
.06 R
4 PLACES
SILICONE RUBBER
GASKET
RELAY
.625
C
B
A
X1
.312
1.000
.290 REF
.95
.093 MAX
PANEL
SOCKET
1.075
1.406
1.71
.116
+
.003 DIA
-
3 PLACES
BOTTOM MOUNT-CLEARANCE
HOLE FOR .192 SCREW
TOP MOUNT-CLEARANCE
HOLE FOR .112 SCREW
.312
.093
.22
.89
1.406
.148
.517
1.035
.625
1.110
.05 R
4 PLACES
MOUNTING DIMENSIONS
GENERAL CHARACTERISTICS
1. Supplied with mounting hardware and No. 16 contacts, No. 16 crimp (SO-1048-8308); No. 16 contacts, No. 20 crimp (SO-1048-8518).
2. Standard tolerances
3. Weight
4. Temperature range
.xx ±.01; xxx ±.005
.115 lb. max
-70° C to +125° C
North America
6900 Orangethorpe Ave.
P.O. Box 5032
Buena Park, CA 90622 USA
Europe, SA
2 Rue Goethe
57430 Sarralbe
France
Tel: (33) 3 87 97 98 97
Fax: (33) 3 87 97 84 04
Asia-Pacific Ltd.
20/F Shing Hing Commercial Bldg.
21-27 Wing Kut Street
Central, Hong Kong
Tel: (852) 2 191 2886
Fax: (852) 2 389 5803
www.leachintl.com
Tel: (01) 714-736-7599
Fax: (01) 714-670-1145
Data sheets are for initial product selection and comparison. Contact Leach International prior to choosing a component.
Date of issue: 3/06
-9-
Page 1 of 1
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