LOW THERMAL EMF
Pickering’s Series 100 and 101 have internal thermal EMF levels as low as 1 microvolt for single pole types or even lower for two pole types used for differential switching, where there can be some cancellation of the thermal EMF voltages from the two switches.
1 Form A, 2 Form A, 1 Form B and 1 Form C configurations available.
Low power consumption, ideal for portable equipment.
Recommended Reed Relays for Low Thermal EMF
Series 100 – Low Thermal EMF
Thermal EMF about 1 microvolt or less. 1 Form A, 2 Form A, 1 Form B & 1 Form C. 3, 5, 12 or 24 V coils. Suitable for data acquisition or thermocouple switching.
The Pickering Series 100 is a complete range of Single-in- Line (SIL) reed relays primarily intended for direct drive from 4000B CMOS or similar low current sources. They feature a very low level of thermal EMF.
Series 101 – Low Capacitance
Thermal EMF Direct drive from 74HC or HCT. 1 Form A, 2 Form A, 1 Form B & 1 Form C. 3, 5, 12 or 24 V coils. Suitable for battery powered portable equipment.
The Series 101 have very high coil resistances. 5 Volt dry versions may be driven directly from 74HC or 74HCT logic without the need for additional drivers. 74HC logic will drive up to 4mA at 5 Volts, therefore a coil resistance of 1600 ohms is desirable to avoid running the IC at its maximum rating.
Shop Reed Relays for Low Thermal EMF
The below table will help you narrow down our offering to get you the correct reed relay for your application.
Once you narrow your selections down you can download a reed relay data sheet for more information or request a quote to find out prices and lead times.
Part Number | Contact Configuration | Switching Current (Amps)
| Switching Power (Watts)
| Switching Voltage (DC or AC peak)
| Stand-off Voltage (DC or AC peak)
| Coil Voltage
| Coil Resistance (Ω)
| Switch Type | Diode | Depth (mm)
| Width (mm)
| Height (mm)
| View Datasheet | Stock | Price | Add to Bag | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
1 Form A - SPST N.O.
|
0.5 Amps
|
10 |
200
|
240
|
5V
|
3000 Ω
|
Low Level Special |
No
|
7.4 |
20.1 |
9.4 |
0 - MTO |
$9.30
|
|||
|
2 Form A - DPST N.O.
|
1 Amps
|
15 |
200
|
240
|
5V
|
1000 Ω
|
General Dry Reed |
No
|
7.4 |
20.1 |
9.4 |
0 - MTO |
$11.25
|
|||
|
|
1 Form A - SPST N.O.
|
2 Amps
|
50 |
500
|
550
|
24V
|
3000 Ω
|
Std Mercury Reed |
Yes
|
7.4 |
20.1 |
9.4 |
19 |
$61.05
|
|||
|
|
2 Form A - DPST N.O.
|
0.5 Amps
|
10 |
200
|
240
|
24V
|
6000 Ω
|
Low Level Dry Reed |
Yes
|
7.4 |
20.1 |
12.5 |
0 - MTO |
$13.07
|
|||
|
|
1 Form A - SPST N.O.
|
1 Amps
|
20 |
200
|
240
|
24V
|
6000 Ω
|
General Dry Reed |
No
|
7.4 |
20.1 |
9.4 |
0 - MTO |
$10.01
|
|||
|
1 Form C - SPDT Changeover
|
0.25 Amps
|
3 |
200
|
200
|
12V
|
6000 Ω
|
Changeover |
No
|
7.4 |
20.1 |
9.4 |
0 - MTO |
$13.87
|
|||
|
|
1 Form A - SPST N.O.
|
0.5 Amps
|
10 |
400
|
440
|
5V
|
1600 Ω
|
High Voltage Reed |
Yes
|
7.4 |
20.1 |
9.4 |
0 - MTO |
$13.35
|
