SERIES FD370
ENGINEERING DATA SHEET
RAILWAY RELAY
1 PDT-DB-DM, 3 AMP / 72VDC
Polarized, non latching, hermetically sealed relay
1 PDT-DB-DM
Contact arrangement
Coil supply
Direct current
PRINCIPLE TECHNICAL CHARACTERISTICS
Contact rating
Weight
Dimensions of can without
hardware
APPLICATION NOTES:
001
004
007
APPLICABLE SOCKET:
SF300CE40E
72 Vdc / 3 Amps
< 40 grams
26mm x 25.7mm x 13.3mm max
Balanced-force design.
Tin plated, hermetically sealed metal can.
Non-overlapping contact arrangement, see note 4 page 4.
CONTACT ELECTRICAL CHARACTERISTICS
Nominal contact
voltage (Vdc)
72 V
15
≤
U
≤
35 V
35
<
U
≤
90 V
90
<
U
≤
140 V
Contact rating in Amps
resistive load
3
-
-
-
inductive load (L/R=30ms)
1.2
10 mA to 2.50 Amps
10 mA to 1.00 Amps
10 mA to 0.70 Amps
Level
High level
High level
High level
High level
Minimum
operating cycles
1,000,000 cycles
2,000,000 cycles
2,000,000 cycles
2,000,000
cycles
Switching life operation for DC voltage other than 72Vdc: See application note n°004
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
- 38 -
Page 1 of 4
COIL CHARACTERISTICS (Vdc)
CODE
Nominal operating voltage
Maximum operating voltage at +85°C
Minimum operating voltage at +70°C, coil previously
energized at 1.15 Un
Hold voltage at +85°C
Drop-out voltage at -40°C
Coil resistance in Ohms ±10% at +25°C
Maximum back EMF (Volts) (with P suffix)
C
6
H
9
B
J
A
24
D
36
45
SERIES FD370
E
48
60
W
72
90
V
110
138
12 18
7.5 11.3 15 22.5 33
4.2 6.3
8.4 12.6 18.5 25.2 33.6 50.4 77
2.6 3.2
4.2 6.3
7.5
1.5
12.5 17.5 22.5 35
1.8
2
3.6
5.5
0.3 0.45 0.6 0.9
20 45
-15 -15
80 180 320 650 955 3200 5000
-15 -42
-42
-65
-65
-100 -140
GENERAL CHARACTERISTICS
Operating temperature
Dielectric strength at sea level
All terminals to ground
Contact to contact, isolated terminals
Initial insulation resistance at 500 Vdc
Sinusoidal vibration
Shock
1500 Vrms / 50 Hz
1500 Vrms / 50 Hz
>1000 M
Ω
20 G / 30 to 3000 Hz
100 G / 6 ms
30 G / 18 ms
10 µs
10 ms max
10 ms max
1 ms max
20 mΩ max
-40°C to +85°C
Maximum contact opening time under vibration and shock
Operate time at nominal voltage
Release time
Bounce time
Contact resistance at 5 Amps
Date of issue: 4/06
- 39 -
Page 2 of 4
MOUNTING STYLES
B : ISO M3
X
SERIES FD370
A
C : UNC
4
ñ0.5
1
D
M3
or 4.40 UNC 2 B
13.3
MAX
26 MAX
12.3
MAX
35.7
ñ0.15
4
ñ0.15
4
ñ0.15
3.8
35.5
36.7
44 MAX
FOR COILS WITH P OPTION : 28.6 MAX
Contrasting bead
44 MAX
DIMENSION X FOR COILS WITHOUT P OPTION : 25.7 MAX
K MOUNTING MAY BE USED WITH 1 OR 8
TERMINAL STYLE; IT INCLUDES THE DELIVERY
OF 10114 ISOLATION SPACER PAD
3.8
J
12.7
12.3
MAX
Isolation pad
10114
5.4
K
1
Ø6
ñ0.1
M3
4
ñ0.15
35.5
36.7
44 MAX
35.7
ñ0.15
44 MAX
Dimensions in mm
Tolerances unless otherwise specified ±0.25mm
SCHEMATIC DIAGRAM
BOTTOM VIEW, DE-ENERGIZED COIL
P OPTION
CE : EXPORTED SPIKES
SUPPRESSOR DEVICE
1
B
+
A
+X1
A
+X1
-X2
2
3
B
1
-X2
2
3
CE
+
TERMINAL TYPES
Ø1.57
-0.03
+0.05
Ø1.57
-0.03
+0.05
5.08
2.54
Ø1.57
ñ0.03
5.08
5.08
Ø1.57
-0.03
+0.05
Polarizing pin
2.54
Ø1.57
ñ0.03
5.08
5.4
1
2
1.3
ñ0.1
4
7
8
7.6
6.9
ñ0.2
5.08
Ø2
SOLDER HOOKS
7.9
MAX
TIN PLATED PINS
Silicone gasket
shore A 15-30
GOLD PLATED PINS
5.08
BENT TIN PLATED PINS
1.27
+0.5
3.6
+0
Isolation pad 10114
SHORT TIN PLATED PINS
Date of issue: 4/06
- 40 -
Page 3 of 4
NUMBERING SYSTEM
FD370 B
4
A
P
Basic series designation__________________________|
|
|
|
|
1-Mounting Styles (A,B,C,D,J,K)_______________________|
|
|
|
2-Terminal Types(1,2,4,8)_________________________________|
|
|
3-Coil Voltage (C,H,B,J,A,D,E,W,V)____________________________|
|
4-Coil Suppression (P)_____________________________________________|
SERIES FD370
NOTES
1.
2.
3.
4.
Relays with B, D mounting styles and terminal type 4 are compatible with socket SF300CE40E.
Isolation spacer pads for PCB mounting available on request.
For other mounting styles or terminal types, please contact factory.
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.
TYPICAL CHARACTERISTICS
q
q
Coil resistance temperature change: See application note no. 001
Coil L/R ratio for all types of DC coils is = 9 ms
Date of issue: 4/06
- 41 -
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
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