# Reed Relay, Rhodium, SPST-NO, 24 VDC, D-HR Series, Through Hole, 780 ohm, 3 A

![Product image](https://novapart.co/image/farnell:2663952/)

**URL**: https://novapart.co/products/DAR72410-HR/reed-relay-rhodium-spst-no-24-vdc-d-hr-series
**SKU**: DAR72410-HR
**Manufacturer**: SENSATA / CYNERGY3
**Category**: Switches & Relays || Relays || Reed Relays
**Price**: €62.2700
**Stock**: 10+
**Lead Time**: 134 days (indicative)

## Description

Contact Configuration:SPST-NO; Coil Voltage:24VDC; Product Range:D-HR Series; Relay Mounting:Through Hole; Coil Resistance:780ohm; Switching Current Max:3A; Switching Voltage Max:1kV; SV

## Specifications

| Parameter | Value |
|---|---|
| Coil Voltage | 24VDC |
| Product Range | D-HR Series |
| Relay Mounting | Through Hole |
| Coil Resistance | 780ohm |
| Contact Configuration | SPST-NO |
| Switching Current Max | 3A |
| Switching Voltage Max | 1kV |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:2663952/)

## **| D-HR SERIES** 

## HIGH INSULATION RESISTANCE, HIGH VOLTAGE RELAYS, 5KV, 7.5KV, 10KV & 15KV 

Very high isolation voltages, up to 15kV, are achieved through the use of high vacuum reed switches. Rhodium or tungsten contacts make these relays suitable for high reliability applications, such as cardiac defibrillators, test equipment and high voltage power supplies. 

The rhodium contact relays have low contact resistance, whilst the tungsten contact relays can switch higher voltages. 

## Features 

- 5kV, 7.5kV,10kV or 15kV isolation 

- Low contact resistance 

- Insulation resistance 1x10[12] Ohms minimum, 1x10[14] Ohms typical 

- PCB or flying leads connections 

- Ideal for sensitive test and measurement circuits which require low leakage current losses 

## **SPECIFICATIONS** 

|**Contact**<br>~~PCT~~|**Unit Condition**<br>~~PCT~~|**5kV SPNO**<br>~~PCT~~|**5kV SPNC**<br>~~ns~~|**7.5kV SPNO**<br>~~(OQ~~|**7.5kV SPNC**<br>~~(OQ~~|**10kV SPNO**<br>~~(OQ~~|**10kV SPNC**|**15kV SPNO***|
|---|---|---|---|---|---|---|---|---|
|**Contact Material**<br>~~PCT~~|~~es~~<br>~~PCT~~|Rhodium<br>Tungsten<br>~~es~~<br>~~PCT~~|Rhodium<br>Tungsten<br>~~es~~<br>~~ns~~|Rhodium<br>Tungsten<br>~~es~~<br>~~(OQ~~|Rhodium<br>Tungsten<br>~~es~~<br>~~(OQ~~|Rhodium<br>Tungsten<br>~~es~~<br>~~(OQ~~|Rhodium<br>Tungsten<br>~~es~~|Tungsten<br>~~es~~|
|**Isolation across contacts**<br>~~PCT~~|kV   DC or AC peak<br>~~PCT~~<br>~~es~~|5<br>5<br>~~PCT~~<br>~~QO~~|5<br>5<br>~~ns~~<br>~~QO~~|7.5<br>7.5<br>~~(OQ~~<br>~~QO~~|7.5<br>7.5<br>~~(OQ~~<br>~~DO~~|10<br>10<br>~~(OQ~~<br>~~DO~~|10<br>10|15|
|**Switching Power Max.**<br>~~PCT~~|W<br>~~PCT~~<br>~~es~~<br>~~PT~~|50<br>50<br>~~PCT~~<br>~~QO~~<br>~~PT~~|50<br>50<br>~~ns~~<br>~~QO~~|50<br>50<br>~~(OQ~~<br>~~QO~~|50<br>50<br>~~(OQ~~<br>~~DO~~|50<br>50<br>~~(OQ~~<br>~~DO~~|50<br>50|50|
|**Switching Voltage Max.**|V   DC or AC peak<br>~~es~~<br>~~PT~~|1000<br>3500<br>~~QO~~<br>~~PT~~|1000<br>3500<br>~~QO~~|1000<br>5000<br>~~QO~~|1000<br>5000<br>~~DO~~|1000<br>7000<br>~~DO~~|1000<br>7000|10000|
|**Switching Current Max.**|A   DC or AC peak<br>~~PT~~<br>~~ss~~|3<br>2<br>~~PT~~<br>~~ss~~|3<br>2<br>~~(OO~~|3<br>2<br>~~(OO~~|3<br>2<br>~~(OO~~|3<br>2<br>~~(OO~~|3<br>2|2|
|**Carry Current Max**|A   DC or AC peak<br>~~a~~|4<br>3<br>~~ee~~|4<br>3<br>~~ee ee~~|4<br>3<br>~~ee~~|4<br>3<br>~~ee~~|4<br>3<br>~~ee~~|4<br>3<br>~~ee~~|2|
|**Capacitance across**<br>**contacts**|pF   coil to screen<br>grounded<br>~~a~~<br>~~Re~~|<0.2<br><0.2<br>~~ee~~<br>~~es~~|<0.2<br><0.2<br>~~ee ee~~<br>~~rs~~|<0.2<br><0.2<br>~~ee~~<br>~~(er~~|<0.2<br><0.2<br>~~ee~~<br>~~rs~~|<0.2<br><0.2<br>~~ee~~<br>~~(~~|<0.2<br><0.2<br>~~ee~~|<0.2|
|**Lifetime**<br>**Operations**|dry switching<br>~~a~~<br>~~Re~~<br>~~ee~~|109<br>109<br>~~ee ~~<br>~~es~~<br>~~GG~~|109<br>109<br> ~~ee ee~~<br>~~rs~~<br>~~GG~~|109<br>109<br>~~ee ~~<br>~~(er~~<br>~~GG~~|109<br>109<br> ~~ee~~<br>~~rs~~<br>~~GG~~|109<br>109<br>~~ee ~~<br>~~(~~<br>~~GG~~|109<br>109<br> ~~ee~~<br>~~GG~~|109<br>~~GG~~|
||50W switching<br>~~Re ~~<br>~~ee~~<br>~~ee~~|106<br>106<br> ~~es~~<br>~~GG~~<br>~~es~~|106<br>106<br>~~rs~~<br>~~GG~~<br>~~rs~~|106<br>106<br>~~(er~~<br>~~GG~~<br>~~(errr~~|106<br>106<br>~~rs~~<br>~~GG~~<br>~~res ee~~|106<br>106<br>~~(~~<br>~~GG~~<br>~~ee~~|106<br>106<br>~~GG~~<br>~~ee~~|106<br>~~GG~~|
|**Contact Resistance**|mΩmax (typical)<br>~~ee~~<br>~~ee~~|50(15)<br>250(100)<br>~~GG~~<br>~~es~~|50(15)<br>250(100)<br>~~GG~~<br>~~rs~~|50(15)<br>250(100)<br>~~GG~~<br>~~(errr~~|50(15)<br>250(100)<br>~~GG~~<br>~~res ee~~|50(15)<br>250(100)<br>~~GG~~<br>~~ee~~|50(15)<br>250(100)<br>~~GG~~<br>~~ee~~|250(100)<br>~~GG~~|
|**Contact**|**Unit Condition**<br>~~ee~~|**5kV SPNO**<br>~~es ~~|**5kV SPNC**<br> ~~rs ~~|**7.5kV SPNO**<br> ~~(errr~~|**7.5kV SPNC**<br>~~res ee~~|**10kV SPNO**<br>~~ee~~|**10kV SPNC**<br>~~ee~~|**15kV SPNO***|
|**Coil**|~~a~~|**5V     12V    24V**<br>~~es~~|**5V    12V    24V**<br>~~GG~~|**5V    12V    24V**<br>~~GG~~|**5V    12V    24V**<br>~~GG~~|**5V    12V    24V**<br>~~GG~~|**5V    12V    24V**<br>~~GG~~|**5V 12V 24V**<br>~~GG~~|
|**Must Operate Voltage**|V    DC<br>~~a~~|3.7    9    20<br>~~es~~|3.7    9    20<br>~~GG~~|3.7    9    20<br>~~GG~~|3.7    9    20<br>~~GG~~|3.7    9    20<br>~~GG~~|3.7    9    20<br>~~GG~~|3.7    9    20<br>~~GG~~|
|**Must Release Voltage**|V    DC<br>~~a~~<br>~~a~~|0.5   1.25    4<br>~~es~~<br>~~a~~|0.5   1.25    4<br>~~GG~~<br>~~ee~~|0.5   1.25    4<br>~~GG~~<br>~~ee~~|0.5   1.25    4<br>~~GG~~<br>~~ee~~|0.5   1.25    4<br>~~GG~~<br>~~ee~~|0.5   1.25    4<br>~~GG~~<br>~~ee~~|0.5   1.25    4<br>~~GG~~<br>~~ee~~|
|**Operate Time**|ms<br>diode fitted<br>~~a~~|3.0   3.0    3.0<br>~~a~~|2.0   2.0    2.0<br>~~ee~~|3.0   3.0    3.0<br>~~ee~~|2.0   2.0    2.0<br>~~ee~~|3.0   3.0    3.0<br>~~ee~~|2.0   2.0    2.0<br>~~ee~~|3.0   3.0    3.0<br>~~ee~~|
|**Release Time**<br>~~PCT~~|ms<br>diode fitted<br>~~a~~<br>~~PCT~~|2.0   2.0    2.0<br>~~a ~~<br>~~PCT~~|3.0   3.0    3.0<br> ~~ee ~~<br>|2.0   2.0    2.0<br> ~~ee~~<br>|3.0   3.0    3.0<br>~~ee~~<br>|2.0   2.0    2.0<br>~~ee~~<br>|3.0   3.0    3.0<br>~~ee ~~<br>|2.0   2.0    2.0<br> ~~ee~~<br>|
|**Resistance**<br>~~PCT~~|Ω<br>~~PCT~~|28   150   780<br>~~PCT~~|38   240   925<br>|28   150   780<br>|38   240   925<br>|28   150   780<br>|38   240   925<br>|16   95  350<br>|
|Note. The operate / release voltage and coil resistance will change at a rate of 0.4% per degree C. Values are stated at room temperature (20 degrees C)<br>~~PCT~~|||||||||
|**Relay**<br>|**Unit Condition**<br>|**Value**<br>|||||||
|**Isolation contact/coil**<br>|kV DC or AC peak<br>|17<br>|||||||
|**Insulation resistance**<br>**min. (typical)**<br>|Ω, Between all<br>isolated pins at<br>1000V, 20°C ±5°C,<br>45% RH ±10%<br>~~Pf~~|1012(1014)<br>~~Pf~~|||||||
|**Environmental Operating**<br>**Temperature**<br>|ºC<br>~~Pf~~|-20 to +70<br>~~Pf~~|||||||



* Form B (n/c) is not available on 15kV models. 

Page 1 

**sensata.com** 

Copyright © 2025 Sensata Technologies, Inc. 

## **DIMENSIONS** 

All dimensions are in millimeters. Tolerances acc. to ISO 2768 class m 

**Please refer to this document for circuit design notes:-** https://www.cynergy3.com/blog/reed-relay-application-notes 

Page   2 

Copyright © 2025 Sensata Technologies, Inc. 

**sensata.com** 

Example : DAT71210F-HR 

## **ORDERING OPTIONS** 

|**Reed Switch**|**D**|**A**|**A**|**T**|**T**|**7**|**7**|**12**|**12**|**10**|**10**|**F**<br>**-**|**F**<br>**-**|**HR**|**HR**|**HR**|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
||**Size**||||||||||||||||
||||||||||||||||||
|**Contact Form**|||||||||||||||||
||||||||||||||||||
|**A =**n/o<br>**B =**n/c*|||||||||||||||||
|**Contact Mater**|**ial**||||||||||||||||
||||||||||||||||||
|**R =**Rhodium<br>**T =**Tungsten|||||||||||||||||
|**Moulding Ref.**|**No.**||||||||||||||||
||||||||||||||||||
||||||||||||||||||
|**Coil Voltage**|||||||||||||||||
||||||||||||||||||
|**05 =**5Vdc<br>**12 =**12Vdc<br>**24 =**24Vdc|||||||||||||||||
|**Isolation betw**|**een Contacts**||||||||||||||||
||||||||||||||||||
|**05 =**5kV<br>**75** **=**7.5kV<br>**10** **=**10kV<br>**15** **=**15kV|||||||||||||||||
|**Mounting or C**|**onnection Style**||||||||||||||||
||||||||||||||||||
|No sufx indicate<br>**F =**PCB mount w|s PCB mount<br>ith & coil connection with|||fying lead HV connection|||||||||||||
|**Insulation Resistance**|**istance**||||||||||||||||
||||||||||||||||||
|**HR** **=**High Insulation Resistance Version|||||||||||||||||



* Form B (n/c) is not available on 15kV models. 

**Please refer to this document for circuit design notes:-** https://www.cynergy3.com/blog/reed-relay-application-notes 

## **Made in the UK** 

Datasheets provided by Sensata Technologies, Inc., its subsidiaries and/or affiliates (“Sensata”) are solely intended to assist third parties (“Buyers”) who are developing systems that incorporate Sensata products (also referred to herein as “components”). Buyer understands and agrees that Buyer remains responsible for using its independent analysis, valuation, and judgment in designing Buyer’s systems and products. Sensata datasheets have been created using standard laboratory conditions and engineering practices. Sensata has not conducted any testing other than that specifically described in the published documentation for a particular datasheet. Sensata may make corrections, enhancements, improvements, and other changes to its datasheets or components without notice. Buyers are authorized to use Sensata datasheets with the Sensata component(s) identified in each particular datasheet. HOWEVER, NO OTHER LICENSE, EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE TO ANY OTHER SENSATA INTELLECTUAL PROPERTY RIGHT, AND NO LICENSE TO ANY THIRD PARTY TECHNOLOGY OR INTELLECTUAL PROPERTY RIGHT, IS GRANTED HEREIN. SENSATA DATASHEETS ARE PROVIDED “AS IS”. SENSATA MAKES NO WARRANTIES OR REPRESENTATIONS WITH REGARD TO THE DATASHEETS OR USE OF THE DATASHEETS, EXPRESS, IMPLIED, OR STATUTORY, INCLUDING ACCURACY OR COMPLETENESS. SENSATA DISCLAIMS ANY WARRANTY OF TITLE AND ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT, QUIET POSSESSION, AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUAL PROPERTY RIGHTS WITH REGARD TO SENSATA DATASHEETS OR USE THEREOF. 

Page 3 **CONTACT US** +44 (0)1202 897969 support@sensata.com Cynergy3 Components Ltd. 7 Cobham Road, Ferndown Industrial Estate, Wimborne, Dorset, BH21 7PE, United Kingdom 

All products are sold subject to Sensata’s terms and conditions of sale supplied at www.sensata.com. SENSATA ASSUMES NO LIABILITY FOR APPLICATIONS ASSISTANCE OR THE DESIGN OF BUYERS’ PRODUCTS. BUYER ACKNOWLEDGES AND AGREES THAT IT IS SOLELY RESPONSIBLE FOR COMPLIANCE WITH ALL LEGAL, REGULATORY, AND SAFETY-RELATED REQUIREMENTS CONCERNING ITS PRODUCTS, AND ANY USE OF SENSATA COMPONENTS IN ITS APPLICATIONS, NOTWITHSTANDING ANY APPLICATIONS-RELATED INFORMATION OR SUPPORT THAT MAY BE PROVIDED BY SENSATA. Mailing Address: Sensata Technologies, Inc., 529 Pleasant Street, Attleboro, MA 02703, USA. 

Copyright © 2025 Sensata Technologies, Inc. 

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