ENGINEERING DATA SHEET SERIES F470
RAILWAY RELAY
4 PDT, 1 AMP / 72VDC
APPLICATION NOTES:
001
003
007
APPLICABLE SOCKET:
SF400CE40E
SF400-1F
Polarized, non latching, hermetically sealed relay
Contact arrangement 4 PDT
Coil supply Direct current
Meets the requiements of MIL-R-6106
CEECC16101-019
NF F 62-002-2 FP n°9
PRINCIPLE TECHNICAL CHARACTERISTICS
Contact rating 72 Vdc / 1 Amp
Weight < 80 grams
Dimensions of can without
hardware 26mm x 25.7mm x 26mm max
Balanced-force design.
Tin plated, hermetically sealed metal can.
Non-overlapping contact arrangement, see note 5 page 4.
CONTACT ELECTRICAL CHARACTERISTICS
Nominal contact
voltage (Vdc) Contact rating in Amps Level Minimum
operating cycles
resistive load inductive load (L/R=30ms)
72 V
5 ≤ U ≤ 90 V
15 ≤ U ≤ 35 V
35 < U ≤ 90 V
90 < U ≤ 140 V
1
1 to 20mA
-
-
-
0.6
-
10 mA to 1.50 Amps
10 mA to 0.50 Amps
10 mA to 0.35 Amps
High level
Low level
High level
High level
High level
1,000,000 cycles
2,000,000 cycles
2,000,000 cycles
2,000,000 cycles
2,000,000
cycles
Life expectancy for DC loads other than 72Vdc: See application note n°003
Featuring LEACH© power and control solutions
www.esterline.com
AMERICAS
6900 Orangethorpe Ave.
P.O. Box 5032
Buena Park, CA 90622
.
.
Tel: (01) 714-736-7599
Fax: (01) 714-670-1145
EUROPE
2 Rue Goethe
57430 Sarralbe
France
.
.
Tel: (33) 3 87 97 31 01
Fax: (33) 3 87 97 96 86
ASIA
Units 602-603 6/F Lakeside 1
No.8 Science Park West Avenue
Phase Two, Hong Kong Science Park
Pak Shek Kok, Tai Po, N.T.
Hong Kong
Tel: (852) 2 191 3830
Fax: (852) 2 389 5803
Data sheets are for initial product selection and comparison. Contact Esterline Power Systems prior to choosing a component.
Date of issue: 4/06 - 13 - Page 1 of 4
COIL CHARACTERISTICS (Vdc) SERIES F470
CODE C H B J A D E W V
Nominal operating voltage 6 9 12 18 24 36 48 72 110
Maximum operating voltage at +85°C 7.5 11.3 15 22.5 33 45 60 90 138
Minimum operating voltage at +70°C, coil previously
energized at 1.15 Un or at 85°C coil previously energized
at Un
4.2 6.3 8.4 12.6 18.5 25.2 33.6 50.4 77
Hold voltage at +85°C 2.6 3.2 4.2 6.3 7.5 12.5 17.5 22.5 35
Drop-out voltage at -40°C 0.3 0.45 0.6 0.9 1.5 1.8 2 3.6 5.5
Coil resistance in Ohms ±10% at +25°C 18 38 70 155 290 550 955 2650 5000
Maximum back EMF (Volts) (with P suffix) -15 -15 -15 -42 -42 -65 -65 -100 -140
GENERAL CHARACTERISTICS
Operating temperature -40°C to +85°C
Dielectric strength at sea level
All terminals to ground 1500 Vrms / 50 Hz
Contact to contact, isolated terminals 1500 Vrms / 50 Hz
Initial insulation resistance at 500 Vdc >100 M Ω
Sinusoidal vibration 20 G / 30 to 3000 Hz
Shock 100 G / 6 ms
30 G / 18 ms
Maximum contact opening time under vibration and shock 10 µs
Operate time at nominal voltage (including bounce) 15 ms max
Release time 15 ms max
Bounce time 1 ms max
Contact resistance at 5 Amps 15 mΩ max
Date of issue: 4/06 - 14 - Page 2 of 4
MOUNTING STYLES SERIES F470
Dimensions in mm
Tolerances unless otherwise specified ±0.25mm
SCHEMATIC DIAGRAM
TERMINAL TYPES
Date of issue: 4/06 - 15 - Page 3 of 4
180°
Code X
Marking face
26 MAX
Contrasting bead
A
4ñ0.5
M3
or 4.40 UNC 2 B
26
MAX
23.8
MAX
25.7
MAX
35.7ñ0.15
ñ0.15
4
B : ISO M3
C : UNC
15.9
ñ0.15
4
3.8
1
35.5
36.7
D
Isolation pad
10124
ñ0.1
35.5
36.7
44 MAX
123.8
MAX
M3
Ø6
3.8
J
15.9
5.4
ñ0.15
ñ0.15
44 MAX
35.7
4
ñ0.1
1.3
+0
-0.08
5
M3
ñ0.1
2
Silicone gasket
shore
A 15-30
Code U
K
44 MAX
Cl‚1
0° 60° 120°
Code V Code W
ñ0.1
9
H
15.9
Cl‚3
Cl‚2
240° 300°
Code Y Code Z
44 MAX
35.7 ñ0.1
K MOUNTING MAY BE USED WITH 1 OR 8
TERMINAL STYLE; IT INCLUDES THE DELIVERY
OF 10124 ISOLATION SPACER PAD
GOLD PLATED PINS
3
+X1
+
A
B
D
C
1 -X2 2
C
E
A
B
D
C
+X1
+
1 -X2 32
BOTTOM VIEW, DE-ENERGIZED COIL
P OPTION
CE : EXPORTED SPIKES
SUPPRESSOR DEVICE
1
6.9ñ0.2
2
Ø2
ñ0.1
1.3
Silicone
gasket shore
A 15-30
7.9
MAX
4
+0.5
3.6+0
Isolation pad
10124
Ø1.57 -0.03
+0.05
Ø1.57 ñ0.03
5.08
5.08
Ø1.57 -0.03
+0.05
8
1.27
GOLD PLATED PINSTIN PLATED PINS SOLDER HOOKS SHORT TIN PLATED PINS
NUMBERING SYSTEM SERIES F470
F470 B 4 A P AND/OR XXX
Basic series designation__________________________| | | | | |
1-Mounting Styles (A,B,C,D,J,K,H)_____________________| | | | |
2-Terminal Types(1,2,4,8)_________________________________| | | |
3-Coil Voltage (C,H,B,J,A,D,E,W,V)____________________________| | |
4-Coil Suppression (P)_____________________________________________| |
5-Coding keys for H mounting style___________________________________________|
NOTES
1. Relays with B, D mounting styles and terminal type 4 are compatible with socket SF400CE40E.
2. Relays with H mounting style are compatible with socket SF400-1F.
3. Isolation spacer pads for PCB mounting available on request.
4. For other mounting styles or terminal types or coding, please contact factory.
5. Non overlapping arrangement insures that if one of the NO or NC contacts is accidentally welded, none of
the other contacts can be transfered to another state.
6. For "H" mount relays with coil suppression, customer should specify the code.
CODING CHART FOR H MOUNTING WITHOUT COIL SUPPRESSION (5)
Type of contact operation Nominal load voltage
pole low level high level 24 volts 48 volts 72 volts 110 volts 36 volts
A X
UUU VUU WUU XUU YUU
B X
C X
D X
A X
UVU VVU WVU XVU YVU
B X
C X
D X
A X
UWU VWU WWU XWU YWU
B X
C X
D X
A X
UXU VXU WXU XXU YXU
B X
C X
D X
A X
UYU VYU WYU XYU YYU
B X
C X
D X
TYPICAL CHARACTERISTICS
● Coil resistance temperature change: See application note n°001
● Coil L/R ratio for all types of DC coils is = 11 ms
Date of issue: 4/06 - 16 - Page 4 of 4
Application notes N°001
CORRECTION DUE TO COIL COPPER WIRE RESISTANCE
CHANGE IN TEMPERATURE
Example: Coil resistance at 25°C: 935 ohms. What is it at 125°C?
Correction coefficient on diagram is: 1.39 at 125°C. R becomes: 935x1.39=1299 Ohms
Correction also applies to operating voltages
Date of issue: 6/00 - 1 - Page 1 of 1
Application notes N°003
To define life at values of L/R different to 30 ms, it is possible to consider the product N cycles X L/R = constant. This for a
given current and voltage.
For example if a 80 V L/R 30ms 0.75 A, life is found on the graph at 100,000 cycles. For a L/R of 10 ms, and the same
current, 0.75 A, life should be 100,000 x 30 / 10 = 300,000 cycles.
Date of issue: 6/00 - 4 - Page 1 of 1
Application notes N°007
SUPPRESSOR DEVICES FOR RELAY COILS
The inductive nature of relay coils allows them to create magnetic forces which are converted to mechanical movements to
operate contact systems. When voltage is applied to a coil, the resulting current generates a magnetic flux, creating
mechanical work. Upon deenergizing the coil, the collapasing magnetic field induces a reverse voltage (also known as back
EMF) which tends to maintain current flow in the coil. The induced voltage level mainly depends on the duration of the
deenergization. The faster the switch-off, the higher the induced voltage.
All coil suppression networks are based on a reduction of speed of current decay. This reduction may also slow down the
opening of contacts, adversly effecting contact life and reliability. Therefore, it is very important to have a clear understanding
of these phenomena when designing a coil suppression circuitry.
Typical coil characteristics
On the graph below, the upper record shows the contacts state. (High level NO contacts closed, low level NC contacts
closed, intermediate state contact transfer). The lower record shows the voltage across the coil when the current is switched
off by another relay contact.
The surge voltage is limited to -300V by the arc generated across contact poles. Discharge duration is about 200
mircoseconds after which the current change does not generate sufficient voltage. The voltage decreases to the point where
the contacts start to move, at this time, the voltage increases due to the energy contained in the NO contact springs. The
voltage decreases again during transfer, and increases once more when the magnetic circuit is closed on permanent
magnet.
Operating times are as follows:
Time to start the movement 1.5ms
Total motion time 2.3ms
Transfer time 1.4ms
Contact State
Date of issue: 6/00 - 8 - Page 1 of 4
Types of suppressors:
Passive devices.
The resistor capacitor circuit
It eliminates the power dissipation problem, as well as fast voltage rises. With a proper match between coil and resistor,
approximate capacitance value can be calculated from:
C = 0.02xT/R, where
T = operating time in milliseconds
R = coil resistance in kiloOhms
C = capacitance in microFarads
The series resistor must be between 0.5 and 1 times the coil resistance. Special consideration must be taken for the
capacitor inrush current in the case of a low resistance coil.
The record shown opposite is performed on the same relay as above. The operation time becomes:
- time to start the movement 2.3ms
- transfer time 1.2ms
The major difficulty comes from the capacitor volume. In our example of a relay with a 290 Ω coil and time delay of 8 ms, a
capacitance value of C=0.5 uF is found. This non polarized capacitor, with a voltage of 63V minimum, has a volume of about
1cm3. For 150V, this volume becomes 1.5 cm3.
Date of issue: 6/00 - 9 - Page 2 of 4
The bifilar coil
The principle is to wind on the magnetic circuit of the main coil a second coil shorted on itself. By a proper adaptation of the
internal resistance of this second coil it is possible to find an acceptable equilibrium between surge voltage and reduction of
the opening speed. To be efficient at fast voltage changes, the coupling of two coils must be perfect. This implies embedded
windings. The volume occupied by the second coil reduces the efficiency of the main coil and results in higher coil power
consumption. This method cannot be applied efficiently to products not specifically designed for this purpose.
The resistor (parallel with the coil)
For efficient action, the resistor must be of the same order of magnitude as the coil resistance. A resistor 1.5 times the coil
resistance will limit the surge to 1.5 times the supply voltage. Release time and opening speed are moderately affected. The
major problem is the extra power dissipated.
Semi-conductor devices
The diode
It is the most simple method to totally suppress the surge voltage. It has the major disadvantage of the higher reduction of
contact opening speed. This is due to the total recycling, through the diode, of the energy contained in the coil itself. The
following measurement is performed once again on the same relay. Operation times are given by the upper curve:
- time to start the movement 14ms
- transfer time 5ms
These times are multiplied by a coefficient from 4 to 8.
The lower curve shows the coil current. The increase prior to NO contact opening indicates that the contact spring dissipates
its energy. At the opening time the current becomes constant as a result of practically zero opening speed.
Due to this kind of behavior, this type of suppression must be avoided for power relays. For small relays which have to switch
low currents of less than 0.2 A, degradation of life is not that significant and the method may be acceptable.
Date of issue: 6/00 - 10 - Page 3 of 4
The diode + resistor network
It eliminates the inconvenience of the resistor alone, explained above, and it limits the action of a single diode. It is now
preferred to used the diode + zener network.
The diode + zener network
Like the resistor, the zener allows a faster decurrent decay. In addition it introduces a threshold level for current conduction
which avoids the recycling of energy released during contact movement.
The lower curve on the opposite record demonstrates those characteristics. Voltage limitation occurs at 42V. The two
voltages spikes generated by internal movement are at lower levels than zener conduction. As a result, no current is recycled
in the coil.
The opening time phases are as follows:
- time to start the movement 2.6ms
- total motion time 2.4ms
- transfer time 1.4ms
The release time is slightly increased. The contacts' opening speed remains unchanged.
Date of issue: 6/00 - 11 - Page 4 of 4
ENGINEERING DATA SHEET SF400CE40E
RAILWAY SOCKET
BASIC SOCKET SERIES DESIGNATION FOR:
Series F470, FD470, F472, FD472, F470S1
Socket for printed circuit board mounting
GENERAL CHARACTERISTICS
Temperature range -25°C to +70°C
Storage temperature -40°C to +85°C
Insulation resistance > 1000 MΩ
Dielectric strength
- Pins to mounting hardware 1500 Vrms / 50 Hz
- Between pins 1500 Vrms / 50 Hz
Sinusoidal vibration 20 g / 10 to 2000 Hz
Shock 50 g / 11 ms
Mounting hardware provided 6 screw M3-5
Featuring LEACH© power and control solutions
www.esterline.com
AMERICAS
6900 Orangethorpe Ave.
P.O. Box 5032
Buena Park, CA 90622
.
.
Tel: (01) 714-736-7599
Fax: (01) 714-670-1145
EUROPE
2 Rue Goethe
57430 Sarralbe
France
.
.
Tel: (33) 3 87 97 31 01
Fax: (33) 3 87 97 96 86
ASIA
Units 602-603 6/F Lakeside 1
No.8 Science Park West Avenue
Phase Two, Hong Kong Science Park
Pak Shek Kok, Tai Po, N.T.
Hong Kong
Tel: (852) 2 191 3830
Fax: (852) 2 389 5803
Data sheets are for initial product selection and comparison. Contact Esterline Power Systems prior to choosing a component.
Date of issue: 4/06 - 78 - Page 1 of 1
ENGINEERING DATA SHEET SERIES SF400-1F
RAILWAY SOCKET
BASE - H MOUNTING STYLE
BASIC SOCKET SERIES DESIGNATION FOR:
SERIES F470, FD470, F470S1
GENERAL CHARACTERISTICS
Base for F470 relay series with H mounting style.
Foolproof mounting of the relay ensured by 3 keys according to NF F 62-002-2 FF n°8
Connections by 5 mm tabs according to ST363C
Contact Resistance < 5 mΩ
Maximum Current 15 Amps
Dielectric Strength 2625 Vrms / 50 HZ
Insulation Resistance > 1000 MΩ at 100 Vdc
Weight 70 grams
Featuring LEACH© power and control solutions
www.esterline.com
AMERICAS
6900 Orangethorpe Ave.
P.O. Box 5032
Buena Park, CA 90622
.
.
Tel: (01) 714-736-7599
Fax: (01) 714-670-1145
EUROPE
2 Rue Goethe
57430 Sarralbe
France
.
.
Tel: (33) 3 87 97 31 01
Fax: (33) 3 87 97 96 86
ASIA
Units 602-603 6/F Lakeside 1
No.8 Science Park West Avenue
Phase Two, Hong Kong Science Park
Pak Shek Kok, Tai Po, N.T.
Hong Kong
Tel: (852) 2 191 3830
Fax: (852) 2 389 5803
Data sheets are for initial product selection and comparison. Contact Esterline Power Systems prior to choosing a component.
Date of issue: 4/06 - 76 - Page 1 of 2
MOUNTING SERIES SF400-1F
Note: In case of simultaneous mounting of label hloder and spikes suppression module, accessories are mounted
on both side.
Date of issue: 4/06 - 77 - Page 2 of 2
20
2 trous Ø 4.5
52
30.3
40
15.15
52
13.5
45
27
20
MOUNTING CUT OUT
TOP MOUNTING REAR MOUNTING
TOP MOUNTING REAR MOUNTING
