144-2-A-5/2D

High Power & High Voltage SIL/SIP Reed Relays 

Series **144** 

**1 A** switching at up to **80 W** 

**2 A** switching at up to **60 W** 

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Package   @ 4<br>Type<br>**----- End of picture text -----**<br>


Up to **3 kV** stand-off 

Switching Voltage **1000 VDC** up to **10 W** 

Up to **3 A** continuous carry current 

Small size. Stacking on **0.25 Inches** pitch 

Internal mu-metal magnetic screen 

Optional electrostatic screen 

> e@ **1 Form A** , **2 Form A** & **1 Form B** configurations 

> e@ **5 V** , **12 V** or **24 V** Coils with optional internal diode ee Additional build options are available including many pin configurations 

Many benefits compared to industry standard relays 

## (see last page) 

Suitable for high power applications and in many cases, may be used as an alternative to mercury wetted reed relays or miniature electromechanical relays 

The Series 144 reed relays are ideal for mixed signal semiconductor testers, photovoltaic and EV applications, mining gas analysis, medical electronics, in-circuit test equipment, high voltage instrumentation, and much more. In many cases they can also be an alternative to mercury wet reed relays or miniature electromechanical relays, where the low level performance and high isolation can be a significant advantage. 

The Series 144 feature sputtered ruthenium contacts instead of the more common rhodium associated with higher power reed relays. This combines their ability to switch higher power with excellent low level performance, making them the ideal choice where both high power and low level switching is required. The range also features an internal mu-metal screen to eliminate problems that would otherwise be experienced due to magnetic interaction when they are closely stacked, and an optional electrostatic shield between the switch and coil to minimise noise between the coil drive and high voltage circuits. With a maximum switching voltage of 1000 VDC up to 10 W and the option of 2 or 3 kV DC standoff makes these relays suitable for a very wide range of applications. The 3 kV versions having an increased clearance between the switch and the coil pins to accommodate the higher voltage. For information on the recommended spacing between high voltage parts please see 7 page 3. 

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50% Other Manufacturers’  Key: Magnetic Interaction<br>Unscreened relays<br>oO Unscreened<br>40% Other Manufacturers’ Partially screened relays a Partiallyscreened percentage changes in operate This chart demonstrates the<br>Internal voltage due to magnetic<br>30% Pickering /S - Other Unscreened  a mu-metal interaction depending on the<br>relays relays screen<br>Percentage level of magnetic screening<br>Interaction 109P Complete offered from the relay package.<br>20% 110 | mu-metal For more information on<br>operate voltage)(Change in  111P112 117 115 116 104 can magnetic interaction click here.<br>10% 108 113 114 100<br>109111 119 \ 106 144 105 101 100HV<br>\ 107 100HC<br>9 0.145” 9 0.19” 0.245” 9 0.26” 0.29” | 0.40”<br>Relay Package Width (Inches)<br>**----- End of picture text -----**<br>


Issue 1.4 July 2025 

pickeringrelay.com 

Specification 

Series **144** 

## **Switch Ratings - Dry Switches** 

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1 Form A (energize to make) 1 Form B (energize to break) 2 Form A (energize to make)<br>2000 VDC min stand-off  2000 VDC min stand-off  2000 VDC min stand-off<br>Up to1000 VDC switching*  Up to1000 VDC switching*  Up to1000 VDC switching*<br>Up to 80 W switching* Up to 80 W switching* Up to 80 W switching*<br>3000 VDC min stand-off<br>– –<br>Up to1000 VDC switching*<br>Up to 80 W switching*<br>**----- End of picture text -----**<br>


* See contact ratings. 

## **Dry Reed: Series 144 switch ratings - contact ratings for each switch type** 

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Life  Operate<br>Max.  Max.  Max.  Min.<br>Switch  Switch  Power  expectancy  time inc  Release  Special<br>switch   carry   switching   stand-off<br>No  form  rating  ops typical  bounce  time features<br>current  current  volts volts<br>(see Note [1] ) (max)<br>A or B 80 W  1 A  3 A  250  2000 10 [8] 1.0 ms 0.5 ms High voltage<br>2 A or B 60 W  2 A  3 A  250  2000 10 [8] 1.0 ms 0.5 ms High voltage<br>A or B 10 W  10 mA  3 A  1000  2000 10 [8] 1.0 ms 0.5 ms High voltage<br>A 80 W  1 A  3 A  250  3000 10 [8] 1.0 ms 0.5 ms High voltage<br>3 A 60 W  2 A  3 A  250  3000 10 [8] 1.0 ms 0.5 ms High voltage<br>A 10 W  10 mA  3 A  1000  3000 10 [8] 1.0 ms 0.5 ms High voltage<br>**----- End of picture text -----**<br>


For more information for the Series 144 switching specifications, see our application guide Determining Switching Specifications. 

## Note[1] : Life Expectancy 

Relay life depends upon switch load and end of life criteria. For an end of life contact resistance specification of 1 Ω, switching low loads (10 V at 10 mA resistive) or when ‘cold’ switching, typical life is approx 1 x 10[9] ops. At the maximum load (resistive), typical life is 1 x 10[7] ops. In abusive conditions (e.g. high capacitive inrush current) this figure reduces considerably. Pickering can perform life testing with any load conditions. 

## **Operating Voltages - Standard** 

|Coil voltage - nominal|Must operate voltage - maximum at 25 °C|Must release voltage - minimum at 25 °C|
|---|---|---|
|5 V|3.75 V|0.5 V|
|12 V|9 V|1.2 V|
|24 V|18 V|2.4 V|



## **Environmental Specification/Mechanical Characteristics** 

In the table below, the upper temperature limit can be extended to +125 °C if the coil drive voltage is increased to accommodate the resistance/temperature coefficient of the copper coil winding. This is approximately 0.4% per °C. This means that at 125 °C the coil drive voltage will need to be increased by approximately 40 x 0.4 =16% to maintain the required magnetic drive level. Please contact  sales@pickeringrelay.com  for assistance. 

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Standard Operating Temperature Range -20 ºC to +85 ºC<br>Standard Storage Temperature Range -35 ºC to +100 ºC<br>Shock Resistance 50 g<br>Vibration Resistance (10 - 2000 Hz) 20 g<br>Soldering Temperature (max) (10 s max) 270 ºC<br>Washability (Proper drying process is recommended) Fully Sealed<br>**----- End of picture text -----**<br>


pickeringrelay.com 

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Specification 

Series **144** 

## **Recommended Spacing for High Voltage Parts** 

For high voltages, the recommended space between pins is 2 mm per 1 kV stand-off voltage. For example, the 3 kV version of the 144 should have a gap of 6 mm between the pins. 

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## **Dry Relay: Series 144 Coil Data and Type Numbers** 

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Insulation resistance<br>Max.   (minimum at 25 °C)  Capacitance (typical)<br>Coil  Coil   contact  (see Note [4] ) (see Note [2] )<br>Device Type Type Number<br>(V) resistance resistance<br>(initial) Switch   Across  Closed  Across<br>to coil switch switch to coil open switch<br>1 Form A  144-1-A-5/2D 5 200 Ω<br>Switch No. 2 (2 kV) 144-1-A-12/2D 12 750 Ω 0.15 Ω 10 [12]  Ω 10 [12]  Ω 2.5 pF 0.1 pF<br>Package Type 1 * 144-1-A-24/2D 24 2000 Ω<br>1 Form A  144-1-A-5/3D 5 200 Ω<br>Switch No. 3 (3 kV) 144-1-A-12/3D 12 750 Ω 0.15 Ω 10 [12]  Ω 10 [12]  Ω 2.5 pF 0.1 pF<br>Package Type 2 144-1-A-24/3D 24 2000 Ω<br>1 Form B  144-1-B-5/2D 5 300 Ω<br>Switch No. 2 (2 kV) 144-1-B-12/2D 12 1000 Ω 0.20 Ω 10 [12]  Ω 10 [12]  Ω 2.5 pF 0.1 pF<br>Package Type 3 144-1-B-24/2D 24 2200 Ω<br>2 Form A 144-2-A-5/2D 5 100 Ω<br>See  See<br>Switch No. 2 (2 kV) 144-2-A-12/2D 12 350 Ω 0.20 Ω 10 [12]  Ω 10 [12]  Ω<br>Note [3] Note [3]<br>Package Type 4 144-2-A-24/2D 24 1000 Ω<br>**----- End of picture text -----**<br>


When an internal diode is required, the suffix D is added to the part number as shown in the table. 

* Package Type 2 available, contact Pickering for more details. 

## Note[2] : Capacitance across open switch 

The capacitance across the open switch was measured with other connections guarded. 

## Note[3] : Capacitance values 

The value will depend upon on the mode of connection/guarding of unused terminals. Please contact technical sales for details. Note[4] : Insulation resistance 

Insulation resistance will reduce at higher temperatures. For more information on temperature effects click here, or contact Pickering for more in depth guidance. 

pickeringrelay.com 

Page 3 

Specification 

Series **144** 

## **Dry Relay: Series 144 (Electrostatic Shield) Coil Data and Type Numbers** 

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Insulation resistance  Capacitance<br>Max.   (minimum at 25 °C)  (typical)<br>Coil  Coil   contact  (see Note [3] ) (see Note [2] )<br>Device Type Type Number<br>(V) resistance resistance  Closed  Across<br>(initial) Switch   Across  switch  open<br>to coil switch<br>to coil switch<br>1 Form A (ES Shielded)  144ES-1-A-5/2D 5 50 Ω<br>Switch No. 2 (2 kV) 144ES-1-A-12/2D 12 400Ω 0.15 Ω 10 [12]  Ω 10 [12]  Ω 2.5 pF 0.1 pF<br>Package Type 5 144ES-1-A-24/2D 24 1200Ω<br>1 Form A (ES Shielded)  144ES-1-A-5/3D 5 50Ω<br>Switch No. 3 (3 kV) 144ES-1-A-12/3D 12 400 Ω 0.15 Ω 10 [12]  Ω 10 [12]  Ω 2.5 pF 0.1 pF<br>Package Type 5 144ES-1-A-24/3D 24 1200 Ω<br>**----- End of picture text -----**<br>


When an internal diode is required, the suffix D is added to the part number as shown in the table. 

## Note[2] : Capacitance across open switch 

The capacitance across the open switch was measured with other connections guarded. 

## Note[3] : Insulation resistance 

Insulation resistance will reduce at higher temperatures. For more information on temperature effects click here, or contact Pickering for more in depth guidance. 

## **Washing Guidelines** 

Pickering do not make any specific recommendations on washing reed relays, due to the large number of factors in cleaning processes, however we do have suggestions on best practices. Click  here  for more information. 

The technical information shown in this data sheet could contain inaccuracies or typographical errors. This information may be periodically changed or updated and these changes will be included in future versions of this data sheet. 

For different values, latest specifications and product details, please contact your local Pickering sales office. 

**For FREE evaluation samples go to:  pickeringrelay.com/samples** 

pickeringrelay.com 

Page 4 

Specification 

Series **144** 

## **Pin Configuration, Weights and Dimensional Data** (dimensions in inches, millimeters in brackets) 

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0.95 (24.1) 0.245 (6.22)<br>Package Type 1<br>1 Form A +<br>Weight: Typical 2.06 g (8.1)0.32 (0.5)0.02<br>1 3 5 7<br>0.125<br>(3.2) Pin 1 Switch No. 2 (2 kV stand-off)<br>0.02 0.01<br>0.2 0.2 0.2 (0.5) (0.25)<br>(5.1) (5.1) (5.1)<br>0.95 (24.1) 0.245 (6.22)<br>Package Type 2<br>Weight: Typical 2.06 g 0.32 0.02 1 Form A +<br>(8.1) (0.5) 1 3 5 7<br>0.125 Switch No. 3 (3 kV stand-off)<br>(3.2)<br>0.02 0.01<br>Pin 1 Additional Build Options:<br>0.3 0.2 0.3 (0.5) (0.25) Switch No. 2 (2 kV stand-off)<br>(7.6) (5.1) (7.6)<br>1.14 (29.0) 0.245 (6.22)<br>Package Type 3<br>1 Form B<br>Weight: Typical 3.75 g 0.49 (see Note) +<br>(12.5)<br>0.02<br>(0.5) 1 3 5 7<br>Switch No. 2 (2 kV stand-off)<br>0.125<br>(3.2)<br>0.02 0.01<br>Pin 1 0.2 0.2 0.2 (0.5) (0.25)<br>(5.1) (5.1) (5.1)<br>1.14 (29.0) 0.245 (6.22)<br>Package Type 4<br>Weight: Typical 3.70 g 0.49 2 Form A +<br>(12.5)<br>0.02<br>(0.5) 1 2 3 4 5 6<br>0.125 Switch No. 2 (2 kV stand-off)<br>(3.2)<br>0.02 0.01<br>Pin 1 0.2 0.2 0.2 0.2 0.2 (0.5) (0.25)<br>(5.1) (5.1) (5.1) (5.1) (5.1)<br>Package Type 5 0.95 (24.1) 0.245 (6.22)<br>Weight: Typical 1.94 g 0.32 0.02 1 Form ACoaxial +<br>(8.1) (0.5)<br>1 3 5 7<br>0.125<br>(3.2) Pin 1 0.02 0.01 Switch No. 2 (2 kV stand-off)<br>0.2 0.1 0.2 0.1 0.2 (0.5) (0.25) Switch No. 3 (3 kV stand-off)<br>(5.1) (2.5) (5.1) (2.5) (5.1)<br>**----- End of picture text -----**<br>


**Important:** Where the optional internal diode is fitted or for all Form B types, the correct coil polarity must be observed, as shown by the + symbol on the schematics. 

pickeringrelay.com 

Page 5 

Specification 

Series **144** 

## **Similar Relays Comparison** 

If the Series 144 is unsuitable for your application, Pickering also manufactures five other series of reed relays with similar characteristics, but in different package sizes. 

|Series Name|Series Name|131-1-A|119-1-A|119-1-A|119-1-A|119-2-A|119-1-B|119-1-B|104-1-A & 104HT-1-A|104-1-A & 104HT-1-A|104-1-A & 104HT-1-A|104-1-A & 104HT-1-A|104-1-A & 104HT-1-A|104-1-A & 104HT-1-A|104ES-1-A|104ES-1-A|104ES-1-A|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|Physical Outline<br>~~is~~||~~is iediaaie~~|~~iediaaie~~||||||~~iediaaie~~|||||||||
|Depth<br>~~is~~<br>~~Pe~~|mm<br>(inches)<br>~~is~~<br>~~Pe~~|3.7 (0.145)<br>~~is iediaaie~~<br>~~Pe~~|3.7 (0.145)<br>~~iediaaie~~<br>~~Pe~~||||||6.3 (0.245)<br>~~iediaaie~~<br>~~Pe~~|||||||||
|Width<br>~~is~~<br>~~Pe~~||12.5 (0.49)<br>~~is iediaaie~~<br>~~Pe~~|15.1 (0.595)<br>~~iediaaie~~<br>~~Pe~~||20.1 (0.79)<br>~~iediaaie~~<br>~~Pe~~||15.1 (0.595)<br>~~iediaaie~~<br>~~Pe~~||24.1 (0.95)<br>~~iediaaie~~<br>~~Pe~~|||||||||
|Height<br>~~Pe~~||6.6 (0.26)<br>~~Pe~~|6.6 (0.26)<br>~~Pe~~|||8.9 (0.35)<br>~~Pe~~|8.9 (0.35)<br>~~Pe~~||8.2 (0.32)<br>~~Pe~~|||||||||
|Package Volume<br>(mm3)<br>~~Pe~~||306<br>~~Pe~~|369<br>~~Pe~~||491<br>~~Pe~~|662<br>~~Pe~~|498<br>~~Pe~~||1245<br>~~Pe~~|||1245<br>~~Pe~~||1245<br>~~Pe~~|1245<br>~~Pe~~|||
|Typical Weights (g)<br>~~Pe~~<br>~~re~~||0.58<br>~~Pe~~|0.67<br>~~Pe~~<br>~~ee~~||0.74<br>~~Pe~~<br>~~ee~~|1.06<br>~~Pe~~<br>~~ee~~|0.89<br>~~Pe~~<br>~~ee~~||2.06<br>~~Pe~~<br>~~eee~~|||2.06<br>~~Pe~~<br>~~eee~~||2.06<br>~~Pe~~<br>~~eee~~|1.94<br>~~Pe~~<br>~~eee~~|||
|Contact<br>Configuration<br>~~Pe~~<br>~~re~~||1-A<br>(SPST)<br>~~Pe~~|1-A<br>(SPST)<br>~~Pe~~<br>~~ee~~|||2-A<br>(DPST)<br>~~Pe~~<br>~~ee~~|1-B<br>(SPNC)<br>~~Pe~~<br>~~ee~~||1-A<br>(SPST)<br>~~Pe~~<br>~~eee~~<br>~~EEE~~||||||1-A<br>(SPST)<br>~~Pe~~<br>~~eee~~<br>~~Hf -~~|||
|Reed Switch Type<br>~~re~~<br>~~EEE~~||Dry<br>~~EEE~~|Dry<br>~~ee~~<br>~~EEE~~|Dry<br>~~ee~~<br>~~EEE~~|Dry<br>~~ee~~<br>~~EEE~~|Dry<br>~~ee~~<br>~~EEE~~|Dry<br>~~ee~~<br>~~EEE~~|Dry<br>~~ee ~~<br>~~EEE~~|Dry<br> <br>~~EEE~~|Dry<br> ~~eee~~<br>~~EEE~~<br>~~EEE~~|Mercury<br>Wetted<br>~~eee~~<br>~~EEE~~<br>~~EEE~~|Dry<br>~~eee~~<br>~~EEE~~<br>~~EEE~~|Dry<br>~~eee~~<br>~~EEE~~<br>~~EEE~~|Dry<br>~~eee~~<br>~~EEE~~<br>~~EEE~~|Dry<br>~~eee~~<br>~~EEE~~<br>~~Hf~~|Dry<br>~~eee~~<br>~~EEE~~<br>~~Hf~~|Dry<br>~~eee~~<br>~~EEE~~<br>~~Hf -~~|
|Stand-off Voltage (V)<br>~~EEE~~||1500<br>~~EEE~~|1500<br>~~EEE~~|2000<br>~~EEE~~|3000<br>~~EEE~~|1500<br>~~EEE~~|1500<br>~~EEE~~|2000<br>~~EEE~~|1500<br>~~EEE~~|2000<br>~~EEE~~<br>~~EEE~~|1500<br>~~EEE~~<br>~~EEE~~|3000<br>~~EEE~~<br>~~EEE~~|4000<br>~~EEE~~<br>~~EEE~~|5000<br>~~EEE~~<br>~~EEE~~|1500<br>~~EEE~~<br>~~Hf~~|2000<br>~~EEE~~<br>~~Hf~~|3000<br>~~EEE~~<br>~~Hf -~~|
|Switching Voltage (V)<br>~~EEE~~||1000<br>~~EEE~~|1000<br>~~EEE~~||||||1000<br>~~EEE~~<br>~~EEE~~||500<br>~~EEE~~<br>~~EEE~~|1000 (1500)<br>~~EEE~~<br>~~EEE~~|||1000<br>~~EEE~~<br>~~Hf~~|1000<br>~~EEE~~<br>~~Hf~~|1000<br>~~EEE~~<br>~~Hf -~~|
|Switching Current (A)||0.7|0.7||||||1||2|1|||1|1|1|
|Carry Current (A)||1.25|1.25||||||1.5||3|1.5|||1.5|1.5|1.5|
|Switch Power (W)||10|10||||||25||50|25 (3)|||25|25|25|



|Series Name<br>~~_~~|Series Name<br>~~_~~|104-1-B<br>~~ee~~|104-1-B<br>~~ee~~|104-2-A<br>~~ee~~|104-2-A<br>~~ee~~|104-2-A<br>~~ee~~|144-1-A<br>~~rome~~|144-1-A<br>~~rome~~|144-1-B<br>~~rome~~|144-2-A<br>~~rome~~|144ES-1-A|144ES-1-A|
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|Physical Outline<br>~~_~~||~~ee~~|||||~~rome~~||||||
|Depth<br>~~_~~|mm<br>(inches)<br>~~_~~|6.3 (0.245)<br>~~ee~~|||||6.3 (0.245)<br>~~rome~~||6.3 (0.245)<br>~~rome~~|6.3 (0.245)<br>~~rome~~|6.3 (0.245)||
|Width<br>~~_~~||29 (1.14)<br>~~ee~~|||||24.1 (0.95)<br>~~rome~~||29.0 (1.14)<br>~~rome~~|29.0 (1.14)<br>~~rome~~|24.1 (0.95)||
|Height<br>~~_~~||12.5 (0.49)<br>~~ee~~|||||8.2 (0.32)<br>~~rome~~||12.5 (0.49)<br>~~rome~~|12.5 (0.49)<br>~~rome~~|8.2 (0.32)||
|Package Volume<br>(mm3)<br>~~_ ~~||2284<br> ~~ee~~||2284<br>~~ee ~~|||**1**<br>1245<br> ~~rome~~|**2**<br>1245<br>~~rome~~|**3** <br>2284<br>~~rome~~|**4**<br>2284<br>~~rome~~|**5**<br>1245||
|Typical Weights (g)<br>~~A~~||3.75<br>~~A~~||3.70<br>~~A~~|||2.06<br>~~A~~|2.06<br>~~A~~|3.75<br>~~A~~|3.70<br>~~A~~|1.94<br>~~A~~|1.94<br>~~A~~|
|Contact<br>Configuration<br>~~A~~||1-B<br>(SPNC)<br>~~A~~||2-A<br>(DPST)<br>~~A~~|||1-A<br>(SPST)<br>~~A~~|1-A<br>(SPST)<br>~~A~~|1-B<br>(SPNC)<br>~~A~~|2-A<br>(DPST)<br>~~A~~|1-A<br>(SPST)<br>~~A~~|1-A<br>(SPST)<br>~~A~~|
|Reed Switch Type<br>~~oe~~||Dry<br>~~oe~~|Dry<br>~~oe~~|Dry<br>~~oe~~|Dry<br>~~oe~~|Mercury<br>Wetted<br>~~oe~~|Dry<br>~~oe~~|Dry<br>~~oe~~|Dry<br>~~oe~~|Dry<br>~~oe~~|Dry<br>~~oe~~|Dry<br>~~oe~~|
|Stand-off Voltage (V)<br>~~oe~~||1500<br>~~oe~~|2000<br>~~oe~~|1500<br>~~oe~~|2000<br>~~oe~~|1500<br>~~oe~~|2000<br>~~oe~~|3000<br>~~oe~~|2000<br>~~oe~~|2000<br>~~oe~~|2000<br>~~oe~~|3000<br>~~oe~~|
|Switching Voltage (V)||1000||1000||500|1000 (250)|1000 (250)|1000 (250)|1000 (250)|1000 (250)|1000 (250)|
|Switching Current (A)||1||1||2|2 (1 / 0.01)||2 (1 / 0.01)|2 (1 / 0.01)|2 (1 / 0.01)||
|Carry Current (A)||1.5||1.5||3|3||3|3|3||
|Switch Power (W)||25||25||50|80 (60 / 10)||80 (60 / 10)|80 (60 / 10)|80 (60 / 10)||



pickeringrelay.com 

Page 6 

Specification 

Series **144** 

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Series Name 100HV-1-A 100HV-1-B 100HV-2-A<br>Physical Outline<br>Depth 10.2 (0.40) 10.2 (0.40) 10.2 (0.40)<br>mm<br>Width 24.1 (0.95) 29 (1.14) 29 (1.14)<br>(inches)<br>—————————— Height 12.7 (0.50) 15.2 (0.60) 15.2 (0.60)<br>Package Volume<br>3122 3122 4496 4496<br>(mm [3] )<br>es es<br>Typical Weights (g) 6.99 8.75 8.75<br>ee ee ee<br>Contact  1-A  1-B  2-A<br>Configuration (SPST) (SPNC) (DPST)<br>Reed Switch Type Dry Dry Dry Dry Dry Dry Dry<br>ee eee<br>Stand-off Voltage (V) 1500 2000 3000 1500 2000 1500 2000<br>Switching Voltage (V) 1000 1000 1000<br>Switching Current (A) 1 1 1<br>Carry Current (A) 1.5 1.5 1.5<br>Switch Power (W) 25 25 25<br>**----- End of picture text -----**<br>


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Series Name 219-1-A 219-2-A 219-1-B<br>Physical Outline<br>Depth 10.5 (0.42) Body, 13.8 (0.55) Across Legs<br>Width mm  17.2 (0.677)<br>(inches)<br>| Height 8.5 (0.34) 6 #<br>Package Volume<br>1535 1535 1535<br>(mm [3] )<br>a<br>Typical Weights (g) 2.12 2.39 2.19<br>eeee<br>Contact  1-A  2-A  1-B<br>Configuration (SPST) (DPST) (SPNC)<br>ee es<br>Reed Switch Type Dry Dry Dry Dry Dry Dry<br>Stand-off Voltage (V) 1500 2000 3000 1500 1500 2000<br>ff} ftee ee ee<br>Switching Voltage (V) 1000<br>Switching Current (A) 0.7<br>Carry Current (A) 1.25<br>Switch Power (W) 10<br>**----- End of picture text -----**<br>


## **Reed Relay Selection Tool** 

Pickering has created the Reed Relay Selector to assist you in selecting the correct high quality reed relay for your application from our extensive range. To try the tool today go to:  pickeringrelay.com/reed-relay-selector-tool 

pickeringrelay.com 

Page 7 

Ordering Information 

Series **144** 

## **Standard Build Options** 

The Series 144 Reed Relays are available with a number of standard build options to tailor them to your specific application. These options are detailed in the table below. If you decide to go ahead and specify one, or more, of these options you will be allocated a unique part number suffix. 

|Mechanical Build Options|Electrical Build Options|
|---|---|
|Special pin configurations or pin lengths|Different coil resistance|
|Special print with customer’s own part number or logo|Different stand-off or switching voltage|
|Custom packaging possibility|Operate or de-operate time|
|Equivalents to competitors discontinued parts|Pulse capability|
||Enhanced specifications|
||Equivalents to competitors discontinued parts|
||Non-standard coil voltages and resistance figures|
||Special Life testing under customer’s specific load<br>conditions|
||Specific environmental requirements|
||Controlled thermal EMF possibility|



## **Customization** 

If your specific requirements are not met by standard relay, or any of the standard build options, please speak to us to discuss producing a customized reed relay to service your specific application:  pickeringrelay.com/contact 

## **3D Models** 

Interactive 3D models of the complete range of Pickering relay products in STEP, IGS and SLDPRT formats can be downloaded from the website:  pickeringrelay.com/3d-models 

**Part Number Description:      144  -  1  -  A - 5  /  2  D  -  xxx** Series Number of reeds Switch form Coil voltage Switch number (see tables on pages 2 & 3) Diode if fitted (omit if not required) —— Unique suffix (if standard build option selected) **Help** happy to discuss any enquires with you. email:  techsales@pickeringrelay.comtechsales@pickeringrelay.com **Contact Us** UK Headquarters - email:  sales@pickeringrelay.com  |  Tel. +44 1255 428141 USA - email:  ussales@pickeringrelay.com  |  Tel. +1 781 897 1710 Germany - email: = desales@pickeringtest.com  |  Tel. +49 89 125 953 160 France - email:  frsales@pickeringtest.com  |  Tel. +33 9 72 58 77 00 Nordic - email:  ndsales@pickeringtest.com  |  Tel. +46 340 69 06 69 Czech Republic:  czsales@pickeringtest.com  |  Tel. +420 558-987-613 China - email:  chinasales@pickeringtest.com  |  Tel. +86 4008 799 765 Malaysia - email:  aseansales@pickeringrelay.com  |  Tel.+60 12 833 7980 For a full list of agents, distributors and representatives visit:  pickeringrelay.com/agents 

If you need any technical advice or other help, please do not hesitate to contact our Technical Sales Department. We are happy to discuss any enquires with you. email:  techsales@pickeringrelay.comtechsales@pickeringrelay.com 

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10 Key Benefits of Pickering Reed Relays 

Series **144** 

|**Key Benef it**|**Pickering Reed Relays**|**Typical Industry Reed Relays**||
|---|---|---|---|
|1<br>Instrumentation Grade<br>Reed Switches|Instrumentation Grade Reed Switches<br>with vacuum sputtered Ruthenium plating<br>to ensure stable, long life up to 5x10E9<br>operations.|Often low grade Reed Switches with<br>electroplated Rhodium plating resulting in<br>higher, less stable contact resistance.||
|2<br>Formerless Coil<br>Construction|Formerless coil construction increases the<br>coil winding volume, maximizing magnetic<br>effi ciency, allowing the use of less sensitive<br>reed switches resulting in optimal switching<br>action and extended lifetime at operational<br>extremes.|Use of bobbins decreases the coil winding<br>volume, resulting in having less magnetic<br>drive and a need to use more sensitive reed<br>switches which are inherently less stable<br>with greatly reduced restoring forces.|Pickering former-less coil<br>Typical industry coil<br>wound on bobbin|
|3<br>Magnetic<br>Screening|Mu-metal magnetic screening (either external<br>or internal), enables ultra-high PCB side-by-<br>side packing densities with minimal magnetic<br>interaction, saving signifi cant cost and space.<br>Pickering Mu-Metal magnetic screen -<br>interaction approx. 5%|Lower cost reed relays have minimal or no<br>magnetic screening, resulting in magnetic<br>interaction issues causing changes in<br>operating and release voltages, timing and<br>contact resistance, causing switches to not<br>operate at their nominal voltages.Typical<br>industry screen - interaction approx. 30%|X-Ray of Pickering<br>mu-metal<br>magnetic screen<br>X-Ray of typical<br>industry<br>magnetic screen|
|4<br>**SoftCenter**™<br>Technology|**SoftCenter**™technology, provides maximum<br>cushioned protection of the reed switch,<br>minimising internal lifetime stresses and<br>extending the working life and contact<br>stability.|Transfer moulded reed relays (produced<br>using high temperature/pressure), result<br>in signifi cant stresses to the glass reed<br>switch which can cause the switch blades to<br>defl ect or misalign leading to changes in the<br>operating characteristics, contact resistance<br>stability and operating lifetime.|Pickering<br>Typicalindustry<br>soft center<br>therma-setting<br>protection of<br>hardmoulded protection<br>the reed switch<br>of the reed switch|
|5<br>100% Dynamic<br>Testing|100% testing for all operating parameters<br>including dynamic contact wave-shape<br>analysis with full data scrutiny to maintain<br>consistency.|Simple DC testing or just batch testing which<br>may result in non-operational devices being<br>supplied.|Coil Voltage<br>Contact Resistance<br>Dynamic Contact Resistance Test<br>Operate<br>Release|
|6<br>100% Inspection<br>at Every Stage of<br>Manufacturing|Inspection at every stage of manufacturing<br>maintaining high levels of quality.|Often limited batch inspection.|=<br>:<br>+<br>a ws<br>||
|7<br>100% Thermal<br>Cycling|Stress testing of the manufacturing processes,<br>from -20 °C to +85 °C to -20 °C, repeated 3<br>times.|Rarely included resulting in fi eld failures.|+85°C<br>-20°C|
|8<br>Flexible Manufacturing<br>Process|Flexible manufacturing processes allow quick-<br>turn manufacturing of small batches.|Mass production:  Usually large batch sizes<br>and with no quick-turn manufacturing.||
|9<br>Custom Reed Relays|Our reed relays can be customized easily,<br>e.g. special pin confi gurations, enhanced<br>specifi cations, non-standard coil or resistance<br>fi gures, special life testing, low capacitance,<br>and more.|Limited ability to customize.||
|10<br>Product Longevity|Pickering are committed to product longevity;<br>our reed relays are manufactured and<br>supported for more than 25 years from<br>introduction, typically much longer.|Most other manufacturers discontinue parts<br>when they reach a low sales threshold;<br>costing purchasing and R&D a great deal of<br>unnecessary time and money to redesign<br>and maintain supply.|900<br>“Once|



For more information go to: pickeringrelay.com/10-key-benefi ts 

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