SERIES F257
ENGINEERING DATA SHEET
RAILWAY RELAY
2 PDT, 0.5 AMP /72 VDC
Non polarized, non latching, hermetically sealed relay
2 PDT
Contact arrangement
Coil supply
Meets the requirements of
Direct current
NF F 62-002-2 FP n°7
PRINCIPLE TECHNICAL CHARACTERISTICS
Contact rating (L/R=30ms)
Weight
APPLICATION NOTES:
001
007
008
APPLICABLE SOCKETS:
HRCW
SO9005
0.055 Amp / 72 Vdc
< 11 grams
20.6mm x 10.4mm x 10.5mm max
Dimensions of can without
hardware
Tin plated, hermetically sealed metal can.
CONTACT ELECTRICAL CHARACTERISTICS
Minimum
operating cycles
100,000 cycles
100,000 cycles
2,000,000 cycles
100,000 cycles
100 cycles
100 cycles
1,000,000
cycles
Contact rating per
pole and load type
resistive load
inductive load (L/R=5ms)
inductive load
lamp load
resistive overload
low level
Load Current in Amps
@28 Vdc
2
0.75
-
0.16
4
(30 µA/30 mV)
@72 Vdc
0.5
0.25
0.055
-
-
Switching life for operation on the other DC voltage: See application note n° 008
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
-5-
Page 1 of 4
COIL CHARACTERISTICS (Vdc)
CODE
Nominal operating voltage
Maximum operating voltage
Minimum operating voltage at +70°C, coil previously energized at 1.15 Un
Minimum operating voltage at +70°C, coil non previously energized
Hold voltage at +70°C
Drop-out voltage at -25°C
Coil resistance in Ohms ±10% at +25°C
C
6
7
5
4.4
2.5
0.4
B
12
14
10
A
D
SERIES F257
E
48
60
W
72
90
26.5 36
30
22
45
25.2 33.6 50.4
8.8 19.3 22.1 29.5 44.3
5
12
15
2.4
20
3.2
30
4.8
0.8 1.5
47.5 190 935 1600 2600 4400
GENERAL CHARACTERISTICS
Operating temperature
Storage temperature
Dielectric strength at sea level, all points
Initial insulation resistance at 100 Vdc
Sinusoidal vibration
Shock
Maximum contact opening time under vibration and shock
Operate time at nominal voltage
Release time
Bounce time
Contact resistance at 0.5 Amp load current
-25°C to +70°C
-40°C to +85°C
500 Vrms / 50 Hz
>1000 M
Ω
20 G / 70 to 3000 Hz
50 G / 11 ms
10 µs
5 ms max
5 ms max
2.5 ms max
50 mΩ max
Date of issue: 4/06
-6-
Page 2 of 4
MOUNTING STYLES
SERIES F257
10.4
MAX
0.7
1
2
3.2
±0.3
Contrasting
bead
10.5
MAX
20.6 MAX
Dimensions in mm
Tolerances unless otherwise specified ±0.25mm
8
MAX
27
27.4
32.5 MAX
3.1
SCHEMATIC DIAGRAM
BOTTOM VIEW, DE-ENERGIZED COIL
SHEMATIC DIAGRAM WITHOUT TERMINAL
DESIGNATION WILL APPEAR ON THE CASE
A2
B1
X1
A3
B3
X2
B2
A1
TERMINAL TYPES
1
4.8
+0.3
-0.4
+0.03
Ø0.8
-0.05
4
+0.3
-0.4
+0.03
Ø0.8
-0.05
4.8
Tin plated pins
Gold plated pins
NUMBERING SYSTEM
F257 1
1
A
Basic series designation__________________________|
|
|
|
1-Terminal Types(1,4)_________________________________|
|
|
2-Mounting Styles(1,2)____________________________________|
|
3-Coil Voltage (C,B,A,D,E,W)__________________________________|
Date of issue: 4/06
-7-
Page 3 of 4
NOTES
1. Socket:
1.1 - with mounting hardware and solder connections - HRCW - 1M.
1.2 - with mounting hardware and criming contacts - SF 250 R4.
1.3 - for printed circuit board - SO-9005.
2. Isolation spacer pads for PCB mounting available on request.
3. Ultra sonic cleaning may adversly affect the normally closed contacts.
4.Equivalences
NF F 62-002-2 FP n°7
D.200.6
D.200.12
D.200.24
LEACH
F257-11C
F257-11B
F257-11A
SERIES F257
TYPICAL CHARACTERISTICS
q
q
Coil resistance temperature change: See application note no. 001
Coil L/R ratio for all types of DC coils is = 1.5 ms
Date of issue: 4/06
-8-
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
