SONG CHUAN

303
Features
ϭʳUltra Micro ISO Automotive relay.
ϭʳHigh Rating up to 20A.
ϭʳHigh Temperature withstand up to 125ʨ ambient.
ϭʳGeneral Purpose for Automotive applications.
ϭʳComply with RoHS-Directive 2002/95/EC, and ELV-
Directive 2000/53/EC.

Type List
Contact Designation Enclosure style
Terminal style
form (provided with) Flux tight Sealed type washable
---------- 303-1AH-C 303-1AH-S
1A
Socket terminal Resistor 303-1AH-C-R1 303-1AH-S-R1
(SPNO)
Diode 303-1AH-C-D1 303-1AH-S-D1

Ordering Information

303 - 1A H - C - R1
1 2 3 4 5
1. 303 -- Basic series designation 5. Blank -- Standard type
R1 -- Coil parallel with 1/2W resistor for
2. 1A -- Single pole normally open 12V 1.1K7, 24V 4.3K7
D1 -- Coil parallel with diode IN4007 the
3. H -- Contact material AgSnO positive pole on # 85 terminal

4. C -- Flux tight
S -- Sealed type washable

Contact Rating
Resistive 20A 14VDC, 10A 28VDC, 100K ops.
Motor 16A 14VDC Inrush 80AΙON 2s / OFF 5s, -30Д+80ʨ, 300K ops.
Lamp 16A 14VDC Inrush 80AΙON 3s / OFF 3s, -30Д+100ʨ, 100K ops.

Coil Rating (DC)

Rated Rated current Coil resistance Max continuous Pick up Drop out Power consumption
Voltage ̈́10 % at 23° C ̈́10 % at 23° C voltage voltage(Max) voltage(Min) at rated
(V) (mA) (7) at 85°C at 23°C at 23°C voltage
12 80 150 133 % of 60 % of 8 % of
24 40 600 rated rated rated approx. 0.96W
voltage voltage voltage

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 SONG CHUAN

303
Specification
Contact material AgSnO alloy
(1)
Contact voltage drop Typ. 50mV at 10A
(1)
Operate time 10 ms Max.
(1)
Release time 10 ms Max.
(1)
Insulation resistance 20 M7 Min. (DC 500V)
Between open contact : AC 500V, 50/60Hz 1 min.
Dielectric strength (1)
Between contact and coil : AC 500V, 50/60Hz 1 min.
Operating extremes 10Д500Hz , 5.0G
Vibration resistance
Damage limits 10Д500Hz , 5.0G
Operating extremes 10G
Shock resistance
Damage limits 100G
10,000,000 operations
Life expectancy Mechanical
(frequency 18,000 operations/hr)
Operating ambient temperature -40 ~ +125°C (no freezing)
Weight Approx. 20 g
Note : (1) initial value

Outline Dimensions
16 15
(0.630) (0.591)
(0.933)
23.7
(0.433)
11

0.8X4
(0.031)
8.1
(0.319)

87 85
(0.307)
7.8

86 30

Wiring Diagram
BOTTOM VIEW

D1 R1
(-)
87 85 87 85 87 85

86 30 (+) 86 30 86 30

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303
Engineering Data

Safe breaking,arc extinguished Life expectancy

(normally open contact)for risistive loads 10
7

75
70
Switching voltage(VDC)

60

Number of operations
50
6
40 10

30

28
0W
20

10
5
50

10

0W
W

15

10
0.5 1 2 3 5 7 10 20

Switching current(A) 0
1 5 10 15 20 25

14VDC resistive load/switching current(A)

Life expectancy Ambient temperature vs.

7 coil voltage for continuous duty
Max.allowable ambient temperature
10
120
110
100
A
Number of operations

90
6
10
80
70
60

5
50
10
40
30

90 100 110 120 130 140 150 160

0
0 2 4 6 8 10 12
Applied coil voltage(% of rated nominal)
A:20A Contact load(risistive)
28VDC resistive load/switching current(A)
Maximum mean coil temperature=180ʨ

Operate time/Release time

8

7
Operate time

6 max

5
Time (ms)

avg
min
4

3
Release time
2
max
avg
1 min

0
70 80 90 100 110 120 130 140 150

% of Nominal coil voltage (at 23ʨ)

———— All specifications subject to change. Please contact Song Chuan for update. ———— 283
Mouser Electronics

Authorized Distributor

Click to View Pricing, Inventory, Delivery & Lifecycle Information:

Song Chuan:
303-1AH-C-R1-U01-12VDC 303-1AH-C-R1-24VDC
Mouser Electronics

Authorized Distributor

Click to View Pricing, Inventory, Delivery & Lifecycle Information:

Song Chuan:
303-1AH-C-R1-U01-12VDC 303-1AH-C-R1-24VDC 303-1AH-S-D1-12VDC 303-1AH-S-R1-12vdc 303-1AH-C-
12VDC 303-1AH-S-12VDC