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Does a universal signal relay exist?

To tell the truth, probably no, but we have for you a few hints for relays which are very close to an ideal.

This is an archive article published 18.03.2015. Some information may no longer be up to date and in line with the current state. Please contact us in case of interest.
Signal relay is almost an „ideal component“ thanks to a practically zero distortion and a total isolation of a switched signal from a control one. That is naturally one of the main features of all electromechanical relays, but at signal relays it´s especially valued, as we usually require switching of relatively small signals. Favorite and widely used are for example relays Fujitsu series B3 and B4 (miniature SMT and THT relays) and series AxW (miniature only 5mm high relay) - all with bifurcated gold-plated contacts for a high reliability.
A novelty in our portfolio is the series Fujitsu NA representing something like a “golden middle way “. With dimensions 7,4x14,9x9,7 mm it belongs to narrow miniature relay enabling a high density of components on a PCB. Even though relay NA is somewhat bigger than for example series B4, but it´s able to withstand higher AC current - up to 0.5A/125VAC (vs. 0.3A at series B4) and it also provides an extreme mechanical lifetime up to 100x106 , what´s approximately twice that of B4 series. Sensitive coils, with a consumption of 0.1-0.3W at majority of types enable a dense mounting without problems with overheating.
From the point of view of the lowest possible consumption are naturally the best latching relays (with a permanent magnet) controlled only by pulses. Usually they´re easy to recognize by a letter „L“ behind the series marking (for example NAL, JSL). In a Fujitsu signal relays overview and the Fujitsu catalogue can be easily found a comparison among particular types as well as detailed information about them. We try to keep the most favorite types always on stock, what´s also reflected in the substantial increasing of stock.

Should you be interested in any type from the Fujitsu, production which we don´t have on stock, please let us know at info@soselectronic.com and we´ll supply it to you at favorable conditions.

Advantages/ Features of the NA series:

  • reliable 2-pole signal relay
  • bifurcated contacts
  • silver-based contacts, gold-plated
  • able to switch also very small signals
  • high reliability (100x10E6 mechan./ 500x10E3 electr.)
  • miniature dimensions
  • also available latching versions
  • low coil consumption - 100...300 mW
  • attractive price

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Additional products


NA-12W-K FUJITSU  
NA-12W-K

Signal relay 12V 2A 2c 1028R

Signal Relays

Ord. No.: 31817
Manufacturer: FUJITSU
in stock 8788 pcs
2 pcs+
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NA-24W-K FUJITSU  
NA-24W-K

Signal relay 24V 2A 2c 2880R

Signal Relays

Ord. No.: 31818
Manufacturer: FUJITSU
in stock 4000 pcs
3 pcs+
6 pcs+
25 pcs+
100 pcs+
1000 pcs+
0,8060 €
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A-12W-K FUJITSU  
A-12W-K

Signal relay 12V 2A 2c 1028R

Signal Relays

Ord. No.: 31808
Manufacturer: FUJITSU
in stock 3449 pcs
2 pcs+
4 pcs+
20 pcs+
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1,1900 €
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A-24W-K FUJITSU  
A-24W-K

Signal relay 24V 2A 2c 2880R

Signal Relays

Ord. No.: 31809
Manufacturer: FUJITSU
in stock 1099 pcs
2 pcs+
4 pcs+
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50 pcs+
250 pcs+
1,1900 €
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A-3W-K FUJITSU  
A-3W-K

Signal relay 3V 2A 2c 178R

Signal Relays

Ord. No.: 61378
Manufacturer: FUJITSU
in stock 0 pcs
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1 pcs+
2 pcs+
10 pcs+
50 pcs+
200 pcs+
1,99 €
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A-5W-K FUJITSU  
A-5W-K

Signal relay 5V 2A 2c 178R

Signal Relays

Ord. No.: 2802
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AL-D5W-K FUJITSU  
AL-D5W-K

Signal relay latching type 5V 2A 2c 125R

Signal Relays

Ord. No.: 31810
Manufacturer: FUJITSU
in stock 257 pcs
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FTR-B3GA012Z FUJITSU  
FTR-B3GA012Z

Telecomunication relay 1A/30Vdc 12V 1028R SMD

Signal Relays

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in stock 0 pcs
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2 pcs+
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1,99 €
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FTR-B3GB003Z FUJITSU  
FTR-B3GB003Z

Relay ultraminiatur latching 2c 3V 90R SMD

Signal Relays

Ord. No.: 53014
Manufacturer: FUJITSU
in stock 0 pcs
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FTR-B4CA012Z FUJITSU  
FTR-B4CA012Z

Ultra miniature signal relay 12V 2c 1028R

Signal Relays

Ord. No.: 7701
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FTR-B4CB4.5Z FUJITSU  
FTR-B4CB4.5Z

Ultra miniature signal relay 2C

Signal Relays

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RY-12W-K FUJITSU  
RY-12W-K

Signal relay 12V 1A 2c 960R

Signal Relays

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RY-24W-K FUJITSU  
RY-24W-K

Signal relay 24V 1A 2c 2880R

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RY-5W-K FUJITSU  
RY-5W-K

Signal relay 5V 1A 2c 165R

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SY-12W-K FUJITSU  
SY-12W-K

Signal relay 12V 1A 1c 960R

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SY-24W-K FUJITSU  
SY-24W-K

Signal relay 24V 1A 1c 3290R

Signal Relays

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SY-5W-K FUJITSU  
SY-5W-K

Signal relay 5V 1A 1c 167R

Signal Relays

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Manufacturer: FUJITSU
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NA-5W-K FUJITSU  
NA-5W-K new

Signal relay 5V 2A 2c 178R

Signal Relays

Ord. No.: 42429
Manufacturer: FUJITSU
in stock 898 pcs
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NAL-12 WK FUJITSU  
NAL-12 WK

Signal relay latching type 2A 12V/1440R

Signal Relays

Ord. No.: 48888
Manufacturer: FUJITSU
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NAL-9 WK FUJITSU  
NAL-9 WK

Signal relay latching type 2A 9V/810R

Signal Relays

Ord. No.: 48889
Manufacturer: FUJITSU
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NAL-D12 WK FUJITSU  
NAL-D12 WK

Signal relay latching type 2A 12V/720R

Signal Relays

Ord. No.: 48890
Manufacturer: FUJITSU
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NAL-D5 WK FUJITSU  
NAL-D5 WK

Signal relay double winding latching type 2c 2A 5V/125R

Signal Relays

Ord. No.: 79493
Manufacturer: FUJITSU
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NAL-D9 WK FUJITSU  
NAL-D9 WK

Signal relay latching type 2A 12V/405R

Signal Relays

Ord. No.: 48891
Manufacturer: FUJITSU
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RY-12 D-K FUJITSU  
RY-12 D-K

Signal relay

Signal Relays

Ord. No.: 48883
Manufacturer: FUJITSU
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RY-12 WF-K FUJITSU  
RY-12 WF-K

Signal relay

Signal Relays

Ord. No.: 48886
Manufacturer: FUJITSU
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