# Reed Relay, SPST-NO, 5 VDC, 122 Series, Through Hole, 350 ohm, 1 A ![Product image](https://novapart.co/image/farnell:4527734/) **URL**: https://novapart.co/products/122-1-A-5/1/reed-relay-spst-no-5-vdc-122-series-through-hole **SKU**: 122-1-A-5/1 **Manufacturer**: PICKERING **Category**: Switches & Relays || Relays || Reed Relays **Price**: €18.7200 **Stock**: 10+ **Lead Time**: 106 days (indicative) ## Specifications | Parameter | Value | |---|---| | Svhc | No SVHC (21-Jan-2025) | | Coil Voltage | 5VDC | | Product Range | 122 Series | | Relay Mounting | Through Hole | | Coil Resistance | 350ohm | | Contact Configuration | SPST-NO | | Switching Current Max | 1A | | Switching Voltage Max | 200V | ## Datasheet 📄 [Download PDF](https://novapart.co/datasheet/farnell:4527734/) Single Pole _4mm[2 ]_ ™ Reed Relays Series **122** Stacking on **4 mm x 4 mm** pitch allowing the highest packing density currently available **3** or **5 V** coils **==> picture [58 x 9] intentionally omitted <==** **----- Start of picture text -----**
Package Type
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Up to **15 W** , **1A** switching **1 Form A** (SPST) normally open (NO) energize to make Fast operate and release times making these relays ideal for high speed test systems Plastic package with internal mu-metal magnetic screen Ideal for A.T.E. switching matrices or multiplexers Sputtered ruthenium instrumentation grade switch Insulation resistance **>10[12] Ω** ## Additional build options are available eLo e@ Many benefits compared to industry standard relays (see last page) The Series 122 reed relay range is part of Pickering’s new ultra-high density 4 mm[2] product line, which take up the minimum board area of only 4 mm x 4 mm, allowing the highest packing density currently available. The range features sputtered ruthenium instrumentation grade switches rated at up to 15 W, 1.0 A. These are the same reed switches as used in the Pickering Series 112, 113 and 116 but are orientated vertically within the package, allowing this high density. If a higher rating is required, please consider our Series 120 which are rated up to 1.0 A at 20 W but with a higher profile height. If a lower profile height is required, please consider our Series 124 with a height of just 9.5 mm whilst rated up to 10 W, 0.5 A switching. The small size of the package does not allow an internal diode. Back EMF suppression diodes are included in many relay drivers but if they are not, and depending on your drive methods, these may have to be provided externally. While socketing relays is not normally recommended due to the risk of affecting contact resistance integrity, it is appreciated that sockets may sometimes be desired for ease of servicing/replacement, in the case of a relay being damaged or reaching the end of its working life. The device has pins on a 2 mm square pitch. There are suitable connectors available from some manufacturers, both SMD and Through Hole, that will allow these relays to be stacked in either a row or in a matrix on a 4 mm pitch. **==> picture [412 x 189] intentionally omitted <==** **----- Start of picture text -----**
Examples of Packing Density
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The above actual size graphic shows sixteen
Series 122 Relays packed into an area of 1.6 cm x 1.6 cm. A total of 528 Series 122 relays on a Pickering
In comparison, only four of the industry standard reed Interfaces ultra-high-density PXI module
relays can be fitted into the same area. illustrates the packing density of these extremely
small Reed Relays.
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Issue 1.5 May 2025 pickeringrelay.com Specification Series **122** ## **Switch Ratings - Dry Switches** 1 Form A (energize to make) 10 W at 200 V 15 W at 200 V ## **Series 122 switch ratings - contact ratings for each switch type** **==> picture [512 x 85] intentionally omitted <==** **----- Start of picture text -----**
Life Operate
Max. Max. Max.
Switch Switch Power expectancy time inc Release Special
switch carry switching
No form rating ops typical bounce time features
current current volts
(see Note [1] ) (max)
1 A 15 W 1 A 1 A 200 10 [8] 0.5 ms 0.2 ms General purpose
2 A 10 W 0.5 A 0.5 A 200 10 [8] 0.2 ms 0.1 ms Low level
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Switch no.2 is particularly good for switching low currents and/or voltages. It is the ideal switch for A.T.E. systems where cold switching techniques are often used. Where higher power levels are involved, switch no.1 is more suitable. ## 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 2.5 x 10[8] ops. At the maximum load (resistive), typical life is 1 x 10[6] 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** **==> picture [512 x 52] intentionally omitted <==** **----- Start of picture text -----**
Coil voltage - nominal Must operate voltage - maximum at 25 °C Must release voltage - minimum at 25 °C
3 V 2.25 V 0.3 V
5 V 3.75 V 0.5 V
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## **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. **==> picture [386 x 102] intentionally omitted <==** **----- Start of picture text -----**
Operating Temperature Range -20 ºC to +85 ºC
Storage Temperature Range -35 ºC to +100 ºC
Shock Resistance 50 g
Vibration Resistance (10 - 2000 Hz) 20 g
Soldering Temperature (max) (10 s max) 270 ºC
Washability (Proper drying process is recommended) Fully Sealed
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## **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. pickeringrelay.com Page 2 Specification Series **122** ## **Dry Relay: Series 122 Coil data and type numbers** **==> picture [512 x 190] intentionally omitted <==** **----- Start of picture text -----**
Insulation resistance Capacitance
Max. (minimum at 25 °C) (typical)
Coil Coil contact (see Note [4] ) (see Note [2, 3] )
Device Type Type Number
(V) resistance resistance Switch Closed Across
(initial) to coil Across switch open
switch
@1kV DC to coil switch
1 Form A,
122-1-A-3/1 3 125 Ω
Switch No. 1 0.18 Ω 10 [12] Ω 10 [12] Ω 1.6 pF 0.25 pF
122-1-A-5/1 5 350 Ω
Package Type 1
1 Form A,
122-1-A-3/2 3 125 Ω
Switch No. 2 0.18 Ω 10 [12] Ω 10 [12] Ω 1.6 pF 0.25 pF
122-1-A-5/2 5 350 Ω
Package Type 1
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## Note[2] : Switch to coil capacitance Due to the asymmetrical internal construction of the relay, the capacitance to the coil from one switch connection is approximately half the capacitance of the other switch connection, pin 1 is lower. In some applications this feature may be used to advantage for example, in a multiplexer where it is desirable to minimize the capacitance of the common connection to maximize bandwidth. ## Note[3] : Capacitance across open switch The capacitance across the open switch was measured with other connections guarded. ## 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. 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 3 Specification Series **122** ## **Pin Configuration, Weights and Dimensional Data** (dimensions in inches, millimeters in brackets) **==> picture [512 x 290] intentionally omitted <==** **----- Start of picture text -----**
0.153
(3.9)
Package TypePackage Type 11
0.153
Weight: Typical 0.37 gWeight: Typical 0.37 g (3.9)
Cut away corner
indicates Pin 1 Pin
0.01
(0.25)
4 1
0.492
(12.5) 1 Form A Pin 0.08
0.02 (2.0)
(0.5)
3 2
0.125
(3.2) 0.08
(2.0)
0.08 Connection details - viewed from underside
(2.0)
0.08
(2.0)
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pickeringrelay.com Page 4 Specification Series **122** ## **Similar Relays Comparison** If the Series 122 is unsuitable for your application, Pickering also manufactures two other series of reed relays with similar characteristics, but in different package sizes. |Series Name|Series Name|124-1-A|122-1-A|122-1-A|120-1-A|120-1-A| |---|---|---|---|---|---|---| |Physical Outline|||Ts||Ny|| |Depth
~~|~~|mm
(inches)
~~||~~|3.9 (0.153)
~~ee~~|3.9 (0.153)
~~ee~~||3.9 (0.153)
~~Pp~~|| |Width
~~|~~
~~||~~||3.9 (0.153)
~~a~~|3.9 (0.153)||3.9 (0.153)
~~Pp~~|| |Height
~~||~~||9.5 (0.375)
~~a~~|12.5 (0.492)||15.5 (0.61)|| |Package Volume
(mm3)
~~||~~||145
~~a~~|191
**1**||236|| |Typical Weights (g)||0.28|0.37||0.49|| |Contact
Configuration||1-A
(SPST)|1-A
(SPST)||1-A
(SPST)|| |Reed Switch Type
~~eG~~||Dry
~~eG~~|Dry
~~eG~~||Dry
~~eG~~|Dry
~~eG~~| |Switching Voltage
(V)
~~eG~~||170
~~eG~~|200
~~eG~~|200
~~eG~~|200
~~eG~~|200
~~eG~~| |Switching Current
(A)||0.5|1.0|0.5|1.0|0.5| |Carry Current
(A)||0.5|1.0|0.5|1.2|1.2| |Switch Power
(W)||10|15|10|20 (15)|10| ## **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 5 Ordering Information Series **122** ## **Standard Build Options** The Series 122 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|Operate or de-operate time| ||Pulse capability| ||Enhanced specifications| ||Non-standard coil voltages and resistance figures| ||Special Life testing under customer’s specific load
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: i. pickeringrelay.com/contact ## **3D Models** Interactive 3D models of the complete range of Pickering relay products in STEP, IGS and SLDPRT formats can be **==> picture [374 x 132] intentionally omitted <==** **----- Start of picture text -----**
downloaded from the website: Pe pickeringrelay.com/3d-models
Part Number Description: 122 - 1 - A - 5 / 2 - xxx
Series
Number of reeds
Switch form
Coil voltage
Switch number (see table on page 2 )
—
Unique suffix (if standard build option selected)
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## **Help** 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: Po techsales@pickeringrelay.com ## **Contact Us** UK Headquarters - email: sales@pickeringrelay.com | Tel. +44 1255 428141 USA - email: Po ussales@pickeringrelay.com CY | Tel. +1 781 897 1710 Germany - email: Pd 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: PY —— pickeringrelay.com/agents pickeringrelay.com Page 6 **10 Key Benef its** of Pickering Reed Relays Series **122** |**Key Benef it**|**Pickering Reed Relays**|**Typical Industry Reed Relays**|| |---|---|---|---| |1
Instrumentation Grade
Reed Switches|Instrumentation Grade Reed Switches
with vacuum sputtered Ruthenium plating
to ensure stable, long life up to 5x10E9
operations.|Often low grade Reed Switches with
electroplated Rhodium plating resulting in
higher, less stable contact resistance.|| |2
Formerless Coil
Construction|Formerless coil construction increases the
coil winding volume, maximizing magnetic
effi ciency, allowing the use of less sensitive
reed switches resulting in optimal switching
action and extended lifetime at operational
extremes.|Use of bobbins decreases the coil winding
volume, resulting in having less magnetic
drive and a need to use more sensitive reed
switches which are inherently less stable
with greatly reduced restoring forces.|Pickeringformer-less coil
Typical industrycoil
wound on bobbin:| |3
Magnetic
Screening|Mu-metal magnetic screening (either external
or internal), enables ultra-high PCB side-by-
side packing densities with minimal magnetic
interaction, saving signifi cant cost and space.
Pickering Mu-Metal magnetic screen -
interaction approx. 5%|Lower cost reed relays have minimal or no
magnetic screening, resulting in magnetic
interaction issues causing changes in
operating and release voltages, timing and
contact resistance, causing switches to not
operate at their nominal voltages.Typical
industry screen - interaction approx. 30%|X-Ray of Pickering
mu-metal
magnetic screen
X-Ray of typical
industry
magnetic screen| |4
**SoftCenter**™
Technology|**SoftCenter**™technology, provides maximum
cushioned protection of the reed switch,
minimising internal lifetime stresses and
extending the working life and contact
stability.|Transfer moulded reed relays (produced
using high temperature/pressure), result
in signifi cant stresses to the glass reed
switch which can cause the switch blades to
defl ect or misalign leading to changes in the
operating characteristics, contact resistance
stability and operating lifetime.|Pickering
Typical industry
soft center
thermo-setting
protectionof = hard mouldedprotection
the reed switch
of thereed switch| |5
100% Dynamic
Testing|100% testing for all operating parameters
including dynamic contact wave-shape
analysis with full data scrutiny to maintain
consistency.|Simple DC testing or just batch testing which
may result in non-operational devices being
supplied.|Coil Voltage
Contact Resistance
Dynamic Contact Resistance Test
Operate
Release| |6
100% Inspection
at Every Stage of
Manufacturing|Inspection at every stage of manufacturing
maintaining high levels of quality.|Often limited batch inspection.|| |7
100% Thermal
Cycling|Stress testing of the manufacturing processes,
from -20 °C to +85 °C to -20 °C, repeated 3
times.|Rarely included resulting in fi eld failures.|+85°C
-20°C| |8
Flexible Manufacturing
Process|Flexible manufacturing processes allow quick-
turn manufacturing of small batches.|Mass production: Usually large batch sizes
and with no quick-turn manufacturing.|Ga)
ination
3| |9
Custom Reed Relays|Our reed relays can be customized easily,
e.g. special pin confi gurations, enhanced
specifi cations, non-standard coil or resistance
fi gures, special life testing, low capacitance,
and more.|Limited ability to customize.|| |10
Product Longevity|Pickering are committed to product longevity;
our reed relays are manufactured and
supported for more than 25 years from
introduction, typically much longer.|Most other manufacturers discontinue parts
when they reach a low sales threshold;
costing purchasing and R&D a great deal of
unnecessary time and money to redesign
and maintain supply.|900
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