A-18W-K (Fujitsu)
MINIATURE RELAY

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MINIATURE RELAY
2 POLES—1 to 2 A (FOR SIGNAL SWITCHING)
A SERIES
RoHS compliant
n FEATURES
l Extremely low profile and light weight
—Height: 5 mm
—Weight: approximately 1.2 g
l Meet FCC (Part 68) standard
l Conforms to FCC rules and regulations part 68
—Surge strength 1,500 V
l High reliability—bifurcated contacts
l Wide operating range
l DIL pitch terminals
l Plastic sealed type
l Latching version available
l RoHS compliant since date code: 0437B8
Please see page 7 for more information
n ORDERING INFORMATION
A L – D 12 W – K - HA
[Example]
(a) (b) (*) (c) (d) (e) (f ) (g)
(a )
(b)
(c)
(d)
(e)
(f )
(g)
Series Name
Operation Function
Number of Coil
Nominal Voltage
Contact
Enclosure
Coil Sensitivity
A : A Series
Nil : Standard type
L : Latching type
Nil : Single winding type
D : Double winding type
Refer to the COIL DATA CHART
W : Bifurcated type
K : Plastic sealed type
Nil : Standard
HA : 75% must voltage operate
Note: Actual marking omits the hyphen (-) of (*)
1


A-18W-K (Fujitsu)
MINIATURE RELAY

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A SERIES
n COIL DATA CHART
MODEL
Nominal
voltage
Coil resistance
(±10%)
A-1.5W-K
1.5 VDC
16.1Ω
A- 3 W-K
3 VDC
64.3Ω
A-4.5W-K
4.5 VDC
145Ω
A- 5 W-K
5 VDC
178Ω
A- 6 W-K
6 VDC
257Ω
A- 9 W-K
9 VDC
579Ω
A-12 W-K
12 VDC
1,028Ω
A-18 W-K
18 VDC
1,620Ω
A-24 W-K
24 VDC
2,880Ω
A-48 W-K
48 VDC
7,680Ω
Note: *1 Specified values are subject to pulse wave voltage.
All values in the table are measured at 20°C.
Muvsotltoapgeer*a1 te
+1.13 VDC
+2.25 VDC
+3.38 VDC
+3.75 VDC
+4.5 VDC
+6.75 VDC
+9.0 VDC
+13.5 VDC
+18.0 VDC
+36.0 VDC
Muvsotltraegleea*1s e
+0.15 VDC
+0.3 VDC
+0.45 VDC
+0.5 VDC
+0.6 VDC
+0.9 VDC
+1.2 VDC
+1.8 VDC
+2.4 VDC
+4.8 VDC
Nominal
power
140 mW
140 mW
140 mW
140 mW
140 mW
140 mW
140 mW
200 mW
200 mW
300 mW
MODEL
Nominal
voltage
Coil resistance
(±10%)
volStaegt e*1
voRlteasgeet *1
Nominal
power
AL-1.5W-K
1.5 VDC
22.5Ω
+1.13 VDC
-1.05 VDC
100 mW
AL- 3 W-K
3 VDC
90Ω
+2.25 VDC
-2.1 VDC
100 mW
AL-4.5W-K
4.5 VDC
203Ω
+3.38 VDC
-3.15 VDC
100 mW
AL- 5 W-K
5 VDC
250Ω
+3.75 VDC
-3.5 VDC
100 mW
AL- 6 W-K
6 VDC
360Ω
+4.5 VDC
-4.2 VDC
100 mW
AL- 9 W-K
9 VDC
810Ω
+6.75 VDC
-6.3 VDC
100 mW
AL-12 W-K
12 VDC
1,440Ω
+9.0 VDC
-8.4 VDC
100 mW
AL-18 W-K
18 VDC
2,160Ω
+13.5 VDC
-12.6 VDC
150 mW
AL-24 W-K
24 VDC
3,840Ω
+18.0 VDC
-16.8 VDC
150 mW
AL-D1.5W-K
1.5 VDC
P 11.25Ω
+1.13 VDC
S 11.25Ω
+1.05 VDC
200 mW
AL-D 3 W-K
3 VDC
P 45Ω
+2.25 VDC
200 mW
S 45Ω
+2.1 VDC
AL-D4.5W-K
4.5 VDC
P 101Ω
+3.38 VDC
200 mW
S 101Ω
+3.15 VDC
AL-D 5 W-K
5 VDC
P 125Ω
+3.75 VDC
200 mW
S 125Ω
+3.5 VDC
AL-D 6 W-K
6 VDC
P 180Ω
+4.50 VDC
200 mW
S 180Ω
+4.2 VDC
AL-D 9 W-K
9 VDC
P 405Ω
+6.75 VDC
200 mW
S 405Ω
+6.3 VDC
AL-D12 W-K
12 VDC
P 720Ω
+9.0 VDC
200 mW
S 720Ω
+8.4 VDC
AL-D18 W-K
18 VDC
P 1,080Ω
+13.5 VDC
300 mW
S 1,080Ω
+12.6 VDC
AL-D24 W-K
24 VDC
P 1,920Ω
+18.0 VDC
300 mW
S 1,920Ω
+16.8 VDC
Note: *1 Specified values are subject to pulse wave voltage.
All values in the table are measured at 20°C.
P: Primary coil S: Secondary coil



A-18W-K (Fujitsu)
MINIATURE RELAY

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A SERIES
n SPECIFICATIONS
Ite m
Contact
Arrangement
Standard Type
A-( ) W-K
2 form C (DPDT)
Single Winding Latching Type Double Winding Latching Type
AL-( ) W-K
AL-D ( ) W-K
Material
Gold overlay silver alloy
Resistance (initial)
Maximum 50 mΩ (at 1 A 6 VDC)
Rating (resistive)
0.5 A 125 VAC or 1 A 30 VDC
Maximum Carrying Current 2 A
Maximum Switching Power 62.5 AV/30 W
Maximum Switching Voltage 125VAC, 110VDC
Maximum Switching Current 2 A
Minimum Switching Load*1 0.01 mA 10 mVDC
Capacitance
Approximately 0.5 pF (between open contacts, adjacent contacts)
Approximately 1.0 pF (between coil and contacts)
Coil
Nominal Power (at 20°C)
140 to 300 mW 100 to 150 mW 200 to 300 mW
Operate Power (at 20°C)
80 to 170 W 60 to 85 mW 150 to 170 mW
Operating Temperature
–40°C to +85°C (no frost) (refer to the CHARACTERISTIC DATA)
Time Value Operate (at nominal voltage) Maximum 6 ms Maximum 6 ms (set)
Release (at nominal voltage) Maximum 4 ms Maximum 6 ms (reset)
Life
Mechanical
1 × 108 ops. minimum 1 × 107 ops. minimum
Electrical
2 × 105 ops. min. (0.5 A 125 VAC), 5 × 105 ops. min. (1 A 30 VDC)
Other
Vibration Misoperation
Resistance Endurance
10 to 55 Hz (double amplitude of 3.3 mm)
10 to 55 Hz (double amplitude of 5.0 mm)
Shock Misoperation 500 m/s2 (11 ±1 ms)
Resistance Endurance
1,000 m/s2 ( 6 ±1 ms)
Weight
Approximately 1.2 g
*1 Minimum switching loads mentioned above are reference values. Please perform the confirmation test with the actual load
before production since reference values may vary according to switching frequencies, environmental conditions and
expected reliability levels.
n INSULATION
Item
Resistance (initial)
Minimum 1,000 MΩ (500VDC)
Dielectric
Strength
open contacts
coil and contacts
adjacent contacts
1,000 VAC 1 min.
1,000 VAC 1 min.
Surge Voltage
1500V (coil-contact) (10/160 µs standard wave)
n SAFETY STANDARD AND FILE NUMBERS
Type
Compliance
Contact rating
UL UL 478, UL 508
E 45026
Flammability: UL 94-V0 (plastics)
0.5A, 125VAC (General use)
2A, 30VDC (resistive)
0.3A, 110VDC (resistive)
CSA
C22.2 No. 14
LR 35579



A-18W-K (Fujitsu)
MINIATURE RELAY

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n CHARACTERISTIC DATA
A SERIES
0.1 0.3 0.5
n REFERENCE DATA



A-18W-K (Fujitsu)
MINIATURE RELAY

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A SERIES



A-18W-K (Fujitsu)
MINIATURE RELAY

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n DIMENSIONS
l Dimensions
l Schematics
(Bottom View)
A, AL type (Non-latching type, single winding latching type)
A SERIES
l PC board mounting
hole layout
(Bottom View)
AL-D type (Double winding latching type)
Unit: mm



A-18W-K (Fujitsu)
MINIATURE RELAY

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A SERIES
RoHS Compliance and Lead Free Relay Information
1. General Information
l Relays produced after the specific date code that is indicated on each data sheet are lead-free
now. Most of our signal and power relays are lead-free. Please refer to Lead-Free Status Info.
(http://www.fujitsu.com/us/downloads/MICRO/fcai/relays/lead-free-letter.pdf)
l Lead free solder paste currently used in relays is Sn-3.0Ag-0.5Cu.
l All signal and most power relays also comply with RoHS. Please refer to individual data
sheets. Relays that are RoHS compliant do not contain the 5 hazardous materials that
are restricted by RoHS directive (lead, mercury, chromium IV, PBB, PBDE).
l It has been verified that using lead-free relays in leaded assembly process will not cause any
problems (compatible).
l “LF” is marked on each outer and inner carton. (No marking on individual relays).
l To avoid leaded relays (for lead-free sample, etc.) please consult with area sales office.
l We will ship leaded relays as long as the leaded relay inventory exists.
Note: Cadmium was exempted from RoHS on October 21, 2005. (Amendment to Directive 2002/95/EC)
2. Recommended Lead Free Solder Profile
l Recommended solder paste Sn-3.0Ag-0.5Cu.
Reflow Solder condition
Flow Solder condition:
Pre-heating: maximum 120˚C
Soldering: dip within 5 sec. at
260˚C soler bath
Solder by Soldering Iron:
Soldering Iron
Temperature: maximum 360˚C
Duration:
maximum 3 sec.
We highly recommend that you confirm your actual solder conditions
3. Moisture Sensitivity
l Moisture Sensitivity Level standard is not applicable to electromechanical realys.
4. Tin Whisker
l Dipped SnAgCu solder is known as low risk tin whisker. No considerable length whisker was found by our in
house test.



A-18W-K (Fujitsu)
MINIATURE RELAY

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A SERIES
Fujitsu Components International Headquarter Offices
Japan
Fujitsu Component Limited
Gotanda-Chuo Building
3-5, Higashigotanda 2-chome, Shinagawa-ku
Tokyo 141, Japan
Tel: (81-3) 5449-7010
Fax: (81-3) 5449-2626
Email: promothq@ft.ed.fujitsu.com
Web: www.fcl.fujitsu.com
Europe
Fujitsu Components Europe B.V.
Diamantlaan 25
2132 WV Hoofddorp
Netherlands
Tel: (31-23) 5560910
Fax: (31-23) 5560950
Email: info@fceu.fujitsu.com
Web: emea.fujitsu.com/components/
North and South America
Fujitsu Components America, Inc.
250 E. Caribbean Drive
Sunnyvale, CA 94089 U.S.A.
Tel: (1-408) 745-4900
Fax: (1-408) 745-4970
Email: components@us.fujitsu.com
Web: http://www.fujitsu.com/us/services/edevices/components/
Asia Pacific
Fujitsu Components Asia Ltd.
102E Pasir Panjang Road
#01-01 Citilink Warehouse Complex
Singapore 118529
Tel: (65) 6375-8560
Fax: (65) 6273-3021
Email: fcal@fcal.fujitsu.com
Web: http://www.fujitsu.com/sg/services/micro/components/
©2008 Fujitsu Components America, Inc. All rights reserved. All trademarks or registered trademarks are the property of their respective
owners.
Fujitsu Components America or its affiliates do not warrant that the content of datasheet is error free. In a continuing effort to improve our
products Fujitsu Components America, Inc. or its affiliates reserve the right to change specifications/datasheets without prior notice.
Rev. January 9, 2008.





A-18W-K.pdf
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