# Automotive Relay, 24 VDC, 20 A, SPDT, Plug In, Quick Connect, CB Series

![Product image](https://novapart.co/image/farnell:3288473/)

**URL**: https://novapart.co/products/CB1R24/automotive-relay-24-vdc-20-a-spdt-plug-in-quick
**SKU**: CB1R24
**Manufacturer**: PANASONIC
**Category**: Switches & Relays || Relays || Automotive Relays
**Price**: €4.1500
**Stock**: 25+
**Lead Time**: 162 days (indicative)

## Specifications

| Parameter | Value |
|---|---|
| Svhc | To Be Advised |
| Coil Voltage | 24VDC |
| Product Range | CB Series |
| Relay Mounting | Plug In |
| Coil Resistance | 287.2ohm |
| Contact Current | 20A |
| Relay Terminals | Quick Connect |
| Contact Material | Silver Alloy |
| Contact Configuration | SPDT |
| Contact Voltage Dc Nom | 28V |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:3288473/)

CB 

## **HIGH POWER AUTOMOTIVE RELAY** 

## CB RELAYS 

## **FEATURES** 

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**----- Start of picture text -----**<br>
||||||||||
|---|---|---|---|---|---|---|---|---|
|22.0|26.5|
|.866|1.043|22.0|26.0|• 40 A rating at 85|°|C 185|°|F|
|.866|1.024|
|<<|mi|25.5|.|PRN|||• ISO type terminals|
|1.004|
|25.0|• High shock resistance for drop test requirements|
|.984|(2 meters 6.6 feet)|
|7|• Low temperature rise — all current carrying material|
|is copper.|
|Say|m|)|• Plug-in and PC board type|
|mm inch|
|SPECIFICATIONS|
|Contact|
|1) Standard type (12V coil voltage)) Standard type (12V coil voltage) Standard type (12V coil voltage)ype (12V coil voltage)e (12V coil voltage)(12V coil voltage)12V coil voltage)ge)e))|
|Arrangement|1 Form A|1 Form C|High contact capacity (1 Form A)|
|Nominal switching capacity|40 A 14 V DC|N.O.: 40 A 14 V DCN.C.: 30 A 14 V DC|50 A 14 V DC 70 A 14 V DC (at 20(at 85°°C C 18568°°FF))|
|Rating|eeeeee|ee|
|ee|Max. carry current (Initial)|(at 85°C 185°F)|ee|N.O.: 40 A 14 V DC|N.O.: 40 A 14 V DCN.C.: 30 A 14 V DC|N.O.: 40 A 14 V DC|
|Initial contact resistance|
|Max. 15mΩ|
|(By voltage drop 6 V DC 1 A)|
|Contact material|Ag alloy|(Cadmium free)|
|Min. switching capacity|[#1]|1 A 12 V DC (12 V DC), 1 A 24 V DC (24 V DC),|
|ee|Mechanical (at 120 cpm)|Min. 10|[6]|
|Expected life|||Electrical (at rated load)|Flux-resistant type: Min. 10Sealed type: Min. 5 × 10|[4][5]|*|[1]|

**----- End of picture text -----**<br>


## **SPECIFICATIONS** 

## **Contact** 

(1) Standard type (12V coil voltage)) Standard type (12V coil voltage) Standard type (12V coil voltage)ype (12V coil voltage)e (12V coil voltage)(12V coil voltage)12V coil voltage)ge)e)) 

#1 This value can change due to the switching frequency, environmental conditions, and desired reliability level, therefore it is recommended to check this with the actual load. 

## (2) Standard type (24V coil voltage) 

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||||||
|---|---|---|---|---|
|Arrangement|1 Form A|1 Form C|High contact capacity (1 Form A)|
|Nominal switching|20 A 28V DC|N.O.: 20 A 28 V DC|20 A 28V DC|
|capacity|N.C.: 10 A 28 V DC|
|Rating|
|Max. carry current (Initial)|(at 85°C 185°F)|20 A 28 V DC|N.O.: 20 A 28 V DCN.C.: 10 A 28 V DC|20 A 28 V DC|

**----- End of picture text -----**<br>


*[1] All other specifications are the same as those of standard type (12V coil voltage) 

## (3) Heat resistant type (12V, 24V coil voltage) 

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**----- Start of picture text -----**<br>
||||||||||
|---|---|---|---|---|---|---|---|---|
|Type|12V coil voltage|24V coil voltage|
|High contact|High contact|
|Arrangement|1 Form A|1 Form C|capacity|1 Form A|1 Form C|capacity|
|(1 Form A)|(1 Form A)|
|Nominal switching|40 A 14V DC|N.O.: 40 A 14 V DC|40 A 14V DC|20 A 28 V DC|N.O.: 20 A 28 V DC|20 A 28 V DC|
|capacity|N.C.: 30 A 14 V DC|N.C.: 10 A 28 V DC|
|Rating|
|Max. carry current (Initial)|(at 85°C 185°F)*|50 A 14 V DC|N.O.: 50 A 14 V DCN.C.: 30 A 14 V DC|45 A 14 V DC  50 A 14 V DC*|[2]|25 A 28V DC|N.O.: 25 A 28 V DCN.C.: 10 A 28 V DC|25 A 28V DC|

**----- End of picture text -----**<br>


*[1] All other specifications are the same as those of standard type (12V coil voltage) 

- [2] PC board type 

* Current value in which carry current is possible when the coil temperature is 180°C 356°F. 

## **Coil** 

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||||||
|---|---|---|---|---|
|Arrangement|||Coil voltage|Nominal operating|power|
|1 Form A,|12V DC|1.4W|
|1 Form C|24V DC|1.8W|
|High contact capacity|12V DC|1.8W (1.4W: PC board type)|
|(1 Form A)|Pe|24V DC|1.8W (1.4W: PC board type)|

**----- End of picture text -----**<br>


ds_61202_0000_en_cb: 200407D 

1 

## CB 

## **Characteristics** 

|**Characteristics**|**Characteristics**|**Characteristics**||
|---|---|---|---|
|Max. operatingspeed(at rated load)|||15 cpm|
|Initial insulation resistance*2|||Min. 20 MΩ (at 500 V DC)|
|Initial breakdown voltage*3|Between open contacts||500 Vrms for 1 min.|
||Between contacts and coil||500 Vrms for 1 min.|
|Operate time*4 (at nominal voltage)|||Max. 15 ms(Initial)|
|Release time(without diode)*4 (at nominal voltage)|||Max. 15 ms(Initial)|
|Shock resistance||Functional|Min. 200 m/s2 {20 G}|
|||Destructive|Min. 1,000 m/s2 {100 G}|
|Vibration resistance||Functional|10 Hz to 500 Hz, Min. 44.1m/s2 {4.5G}|
|||Functional*5|10 Hz to 2,000 Hz, Min. 44.1m/s2 {4.5G}|
|Conditions for operation, transport and storage*6<br>(Not freezing and condensing at low temperature)||Ambient temp.|–40°C to +85°C–40°F to +185°F<br>(Heat resistant type: –40°C to +125°C–40°F to +257°F)|
|||Humidity|5% R.H. to 85% R.H.|
|Mass|||Approx. 33g 1.16 oz|



## **Remarks** 

- [1] At nominal switching capacity, operating frequency: 2s ON, 2s OFF 

- [2] Measurement at same location as “Initial breakdown voltage” section 

- [3] Detection current: 10 mA 

- [4] Excluding contact bounce time 

*[5] Time of vibration for each direction; X, Y, Z direction: 4 hours X Y 

Z 

- [6] Refer to 6. Conditions for operation, transport and storage mentioned in AMBIENT ENVIRONMENT (p. 19, Relay Technical Information). 

## **TYPICAL APPLICATIONS** 

- **Head lights • ABS** 

**• Air conditioner** 

- **Starters** 

- **Head Lamp • Tracter, Combine** 

## **ORDERING INFORMATION** 

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CB 1 F T M 12 V<br>Contact arrangement Protective construction Heat resistant of types Mounting classification Coil voltage (DC)<br>1a: 1 Form A Nil: Sealed type Nil: Standard type Nil: Plug-in type 12, 24 V<br>1: 1 Form C F: Flux-resistant type T: Heat resistant type P: PC board type<br>1aH: High contact capacity D: Diode M: Bracket type<br>(1 Form A) R: Resistor<br>**----- End of picture text -----**<br>


Note: Bulk package: 50 pcs.; Case: 200 pcs. 

## **TYPES** 

## **1. Standard type** 

|**TYPES**<br>**1. Standard type**|||||
|---|---|---|---|---|
|Contact arrangement|Mounting classification|Coil voltage, V DC|Part No.<br>Sealed type<br>Flux-resistant type||
|||||Flux-resistant type|
|1 Form A|PC board type|12V|CB1a-P-12V|CB1aF-P-12V|
|||24V|CB1a-P-24V|CB1aF-P-24V|
||Plug-in type|12V|CB1a-12V|CB1aF-12V|
|||24V|CB1a-24V|CB1aF-24V|
||Bracket type|12V|CB1a-M-12V|CB1aF-M-12V|
|||24V|CB1a-M-24V|CB1aF-M-24V|
|1 Form C|PC board type|12V|CB1-P-12V|CB1F-P-12V|
|||24V|CB1-P-24V|CB1F-P-24V|
||Plug-in type|12V|CB1-12V|CB1F-12V|
|||24V|CB1-24V|CB1F-24V|
||Bracket type|12V|CB1-M-12V|CB1F-M-12V|
|||24V|CB1-M-24V|CB1F-M-24V|
|High contact capacity (1 Form A)|PC board type*|12V|CB1aH-P-12V|CB1aHF-P-12V|
|||24V|CB1aH-P-24V|CB1aHF-P-24V|
||Plug-in type|12V|CB1aH-12V|CB1aHF-12V|
|||24V|CB1aH-24V|CB1aHF-24V|
||Bracket type|12V|CB1aH-M-12V|CB1aHF-M-12V|
|||24V|CB1aH-M-24V|CB1aHF-M-24V|



* Regarding solder, this product is not MIL (Military Standard) compliant. Please evaluate solder mounting by the actual equipment before using. 

ds_61202_0000_en_cb: 200407D 

2 

CB 

## **2. Heat resistant type** 

|**2. Heat resistant typeypee**|||||
|---|---|---|---|---|
|Contact arrangement|Mounting  classification<br>~~—~~|Coil  voltage, V DC<br>~~—~~|Part No.<br>~~—~~||
||||Sealed type<br>~~—~~|Flux-resistant type<br>~~—~~|
|1 Form A|PC board type<br>~~—~~<br>~~=<~~|12V<br>~~—~~<br>~~=<~~|CB1a-T-P-12V<br>~~—~~<br>~~=<~~|CB1aF-T-P-12V<br>~~—~~<br>~~=<~~|
|||24V<br>~~=<~~|CB1a-T-P-24V<br>~~=<~~|CB1aF-T-P-24V<br>~~=<~~|
||Plug-in type<br>~~=<~~<br>~~=<~~|12V<br>~~=<~~<br>~~=<~~|CB1a-T-12V<br>~~=<~~<br>~~=<~~|CB1aF-T-12V<br>~~=<~~<br>~~=<~~|
|||24V<br>~~=<~~|CB1a-T-24V<br>~~=<~~|CB1aF-T-24V<br>~~=<~~|
||Bracket type<br>~~=<~~<br>~~=<~~|12V<br>~~=<~~<br>~~=<~~|CB1a-T-M-12V<br>~~=<~~<br>~~=<~~|CB1aF-T-M-12V<br>~~=<~~<br>~~=<~~|
|||24V<br>~~=<~~|CB1a-T-M-24V<br>~~=<~~|CB1aF-T-M-24V<br>~~=<~~|
|1 Form C|PC board type<br>~~=<~~<br>~~=<~~|12V<br>~~=<~~<br>~~=<~~|CB1-T-P-12V<br>~~=<~~<br>~~=<~~|CB1F-T-P-12V<br>~~=<~~<br>~~=<~~|
|||24V<br>~~=<~~|CB1-T-P-24V<br>~~=<~~|CB1F-T-P-24V<br>~~=<~~|
||Plug-in type<br>~~=<~~<br>~~=<~~|12V<br>~~=<~~<br>~~=<~~|CB1-T-12V<br>~~=<~~<br>~~=<~~|CB1F-T-12V<br>~~=<~~<br>~~=<~~|
|||24V<br>~~=<~~|CB1-T-24V<br>~~=<~~|CB1F-T-24V<br>~~=<~~|
||Bracket type<br>~~=<~~<br>~~=<~~|12V<br>~~=<~~<br>~~=<~~|CB1-T-M-12V<br>~~=<~~<br>~~=<~~|CB1F-T-M-12V<br>~~=<~~<br>~~=<~~|
|||24V<br>~~=<~~|CB1-T-M-24V<br>~~=<~~|CB1F-T-M-24V<br>~~=<~~|
|High contact capacity (1 Form A)|PC board type*<br>~~=<~~<br>~~=<~~|12V<br>~~=<~~<br>~~=<~~|CB1aH-T-P-12V<br>~~=<~~<br>~~=<~~|CB1aHF-T-P-12V<br>~~=<~~<br>~~=<~~|
|||24V<br>~~=<~~|CB1aH-T-P-24V<br>~~=<~~|CB1aHF-T-P-24V<br>~~=<~~|
||Plug-in type<br>~~=<~~<br>~~=<~~|12V<br>~~=<~~<br>~~=<~~|CB1aH-T-12V<br>~~=<~~<br>~~=<~~|CB1aHF-T-12V<br>~~=<~~<br>~~=<~~|
|||24V<br>~~=<~~|CB1aH-T-24V<br>~~=<~~|CB1aHF-T-24V<br>~~=<~~|
||Bracket type<br>~~=<~~|12V<br>~~=<~~|CB1aH-T-M-12V<br>~~=<~~|CB1aHF-T-M-12V<br>~~=<~~|
|||24V<br>~~=<~~|CB1aH-T-M-24V<br>~~=<~~|CB1aHF-T-M-24V<br>~~=<~~|



* Regarding solder, this product is not MIL (Military Standard) compliant. Please evaluate solder mounting by the actual equipment before using. 

## **COIL DATA (at 20** ° **C 68** ° **F)** 

|Contact<br>arrangement|Nominal<br>voltage,<br>V DC|Pick-up voltage,<br>V DC*<br>Drop-out|Drop-out<br>voltage,<br>V DC|Nominal<br>current,<br>mA|Coil resistance,<br>Ω|Nominal<br>operating power, W|Usable voltage<br>range,<br>V DC|
|---|---|---|---|---|---|---|---|
|1 Form A<br>1 Form C|12|Max. 3 to 7<br>Min. 1.2 to 4.2|Min. 1.2 to 4.2|117±10%|103±10%|1.4|10 to 16|
||24|Max. 6 to 14<br>Min. 2.4 to 8.4|Min. 2.4 to 8.4|75±10%|320±10%|1.8|20 to 32|
|High contact<br>capacity<br>(1 Form A)|12|Max. 3 to 7<br>Min. 1.2 to 4.2|Min. 1.2 to 4.2|117±10%|103±10%|1.4 (PC board type)|10 to 16|
|||||150±10%|80±10%|1.8||
||24|Max. 6 to 14<br>Min. 2.4 to 8.4|Min. 2.4 to 8.4|58±10%|411±10%|1.4 (PC board type)|20 to 32|
|||||75±10%|320±10%|1.8||



* Other pick-up voltage types are also available. Please contact us for details. 

## **DIMENSIONS** 

**1. PC board type** 

mm inch 

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**----- Start of picture text -----**<br>
Schematic (Bottom view)<br>1a<br>86<br>25.0 30<br>.984<br>87<br>85<br>Including diode type,<br>4.5 — including resistor type also available<br>.177<br>1.0 2.15 22.0<br>.039 6.3 .085 .866 1c<br>Led .248 26.0 Ld & & 86 87a<br>1.024 30<br>87<br>Hecht 85<br>Including diode type,<br>86 87a 8.4 a including resistor type also available<br>.331<br>16.8<br>.0310.8 30 85 87 .661 PC board pattern<br>4(or5)-2.6<br>8 2.6 4(or5)-.102 1c type only<br>.315 .102<br>8.4<br>17.9.705 .331 86 87a .3318.4<br>16.8<br>30 87 .661<br>ae Dimension: General tolerance 4(or5)-1.44(or5)-.055 i 85<br>8.0 1c type only<br>Max. 1mm .039 inch: ±0.1 ±.004 .315<br>8.4<br>1 to 3mm .039 to .118 inch: ±0.2 ±.008 .331<br>Min. 3mm .118 inch “_ : ±0.3 ±.012 HE 17.9.705<br>**----- End of picture text -----**<br>


ds_61202_0000_en_cb: 200407D 

3 

CB 

**2. Plug-in type** 

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**----- Start of picture text -----**<br>
Schematic (Bottom view)<br>1a<br>86<br>25.0<br>.984 30<br>87<br>85<br>4.0 Including diode type,<br>11.0.157 including resistor type also available<br>.433<br>1.7 dia. 5-6.3 22.0 1c<br>.067 dia. 1.0245-.24826.0 .866 — 30 86 87a _<br>8.4 87<br>.331 85<br>86 87a Including diode type,<br>est including resistor type also available<br>16.8<br>.0310.8 30 85 87 .661<br>Dimension: General tolerance<br>8 2.6<br>.315 .102 Max. 1mm .039 inch: ±0.1 ±.004<br>i 8.4<br>.331 1 to 3mm .039 to .118 inch: ±0.2 ±.008<br>17.9<br>.705 Min. 3mm .118 inch: ±0.3 ±.012<br>**----- End of picture text -----**<br>


**3. Bracket type** 

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**----- Start of picture text -----**<br>
mm inch<br>**----- End of picture text -----**<br>


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**----- Start of picture text -----**<br>
4.0–0.1<br>16.0 .157–.004<br>.630 1.7<br>5.4–0.1 dia. .067 Schematic (Bottom view)<br>.213–.004<br>.2366.0 16.0.630 1a 86<br>30<br>87<br>85<br>25.0<br>.984 Including diode type,<br>including resistor type also available<br>4.0 1c<br>n 11.0.433.157 c 30 86 87a<br>22.0 1.7 dia. 5-6.3<br>.866 .067 dia. 1.0245-.24826.0 85 87<br>Including diode type,<br>NO including resistor type also available<br>0.8<br>. 031<br>17.9<br>.3158 8.4.331.705 _ Dimension: General tolerance<br>Max. 1mm .039 inch: ±0.1 ±.004<br>.1022.6 16.8.661 8.4.331 1 to 3mm Min. 3mm .039 to .118 inch.118 inch: : ±±0.2 0.3 ±±.008.012<br>Schematic (Bottom view)<br>86<br>30<br>1.00425.5 85 87<br>Including diode type,<br>including resistor type also available<br>15.0 .1574.0 11.0.433<br>.591<br>5.8<br>.228<br>2-6.3 [–0.08] [I 2-9.5 [–0.08]<br>26.5 2-.248 [–.003] 22.0 2-.374 [–.003]<br>1.043 .866<br>t 4-1.7 dia. hole oa s ha l j e<br>4-.067 dia. hole<br>8.4<br>0.8 .331<br>.031 86<br>1.2 16.8<br>.047 30 85 87 .661 — Dimension: General tolerance<br>Max. 1mm .039 inch: ±0.1 ±.004<br>8.4 2.6<br>.331 .102 1 to 3mm .039 to .118 inch: ±0.2 ±.008<br>17.9<br>.705 Min. 3mm .118 inch: ±0.3 ±.012<br>30<br>85 86<br>87a*<br>87<br>**----- End of picture text -----**<br>


**4. High contact capacity type (Plug-in terminal type)** 

ds_61202_0000_en_cb: 200407D 

4 

CB 

## **High contact capacity type (PC board terminal type)** 

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**----- Start of picture text -----**<br>
Schematic (Bottom view)<br>86<br>30<br>1.00425.5 .0391.0 1.0 = 85 87<br>1.0 4.5 .039<br>.039 .177<br>5.3 5.3 4.5<br>.2093-1.73-.067 .3749.5 .2486.3 2-2.152-.085 A*.209 .3749.5 3-1.73-.067.177 .0551.4 PC board pattern .1022.6 3-2.153-.085<br>1.04326.5 22.0.866 86 8.4<br>Sealed by epoxy resin 8.4 3-1.8 7.8 .331 16.8<br>2-0.82-.031 8 6 .331 3-.071 30 87 .307 .661<br>2-1.2 3.9.154 16.8 85<br>2-.047 3.9 .661 3-2.15 3-1.8<br>( 3 0 a 8 5 8 7 .154 3-.085 mie .3077.8 .3318.4 — 3-.071 _<br>17.9<br>.705<br>8.4<br>3.9 3.9 .331<br>.154 H .154 T] 17.9 2.6 ~<br>.705 .102 Dimension: General tolerance<br>Max. 1mm .039 inch: ±0.1 ±.004<br>1 to 3mm .039 to .118 inch: ±0.2 ±.008<br>Min. 3mm .118 inch: ±0.3 ±.012<br>**----- End of picture text -----**<br>


* Intervals between terminals is measured at A surface level. 

## **REFERENCE DATA** 

## **CB RELAYS Standard type (Heat resistant type)** 

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**----- Start of picture text -----**<br>
1. Ambient temperature and current value in  2. Max. switching capability (Resistive load) 3. Ambient temperature and operating<br>which carry current is possible (Standard type) temperature range<br>*Precondition: Initial (Standard type)<br>(N.O. side  Room temperature)<br>150140 BST 60 40<br>35<br>50<br>120 SSS 20A 30 FEE<br>40<br>100 SSS 30A 25 FEE ELA<br>30 20<br>80 40A<br>15<br>60 Pre e 20 saeueane<br>10 [5]  cycle line 10<br>40 10<br>5<br>Actual value Pick-up voltage<br>ft 2090 PPPpt 100 110 | 120 Et 130 140 150 | 0 0 10 20 30(Max. 1040 [5]  cycle)50 | 0-40 P -20 0 PE Et 20(Cold start)40 60 8085 100 120<br>Applied Coil Voltage (% Nominal Voltage) Switching current, A Ambient temperature, °C<br>Asssumption:<br>• Maximum mean coil temperature = 180°C<br>• Curves are based on 1.4W (Nominal power<br>consumption of the unsupprressed coil at nominal<br>voltage)<br>4. Distribution of pick-up and drop-out voltage 5. Distribution of operate and release time<br>Sample: CB1-P-12V, 42pcs. Sample: CB1-P-24V, 42pcs.<br>* Without diode<br>60 60<br>Pick-up voltage Operate time<br>50 BE neee Drop-out voltage 50 L LB Release time<br>40 PTTL 40 |<br>30 PTL  EEL 30 PELLET EEL<br>EE BORRRRRRREE<br>20 20<br>| LT | i eeeeee nee<br>10 10<br>EI | 7 | OT RRRRRE? ane<br>0 a Z| 0 ML LLLZn<br>1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 1.01.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0<br>Voltage, V Operate and release time, ms<br>C°<br>Switching voltage, VDC Coil applied voltage, VDC<br>Maximum Allowable Ambient Temperature,<br>Frequency Quantity, n<br>**----- End of picture text -----**<br>


ds_61202_0000_en_cb: 200407D 

5 

Change of contact resistance 

## CB 

## 6-(1). Electrical life test (Motor free) 

Sample: CB1F-12V, 5pcs. Load: 25A 14V DC, motor free actual load Switching frequency: (ON:OFF = 1s:9s) Ambient temperature: Room temperature Circuit 

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**----- Start of picture text -----**<br>
Tested sample<br>Relay harness<br>14V DC M Motor<br>Observation of load waveform<br>with current probe and digital<br>oscilloscope<br>**----- End of picture text -----**<br>


## Change of pick-up and drop-out voltage 

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**----- Start of picture text -----**<br>
6 50<br>5<br>40<br>Pick-up voltage<br>Max.<br>4 X<br>Min. 3<br>3 Max.<br>X 20<br>2 Drop-out voltage Min.<br>10<br>1<br>Max.<br>X<br>0 0 Min.<br>0 5 10 0 5 10<br>No. of operations, × 10 [4] No. of operations, × 10 [4]<br>Ω<br>Contact resistance, m<br>Pick-up and drop-out voltage, V<br>**----- End of picture text -----**<br>


## Load current waveform 

Inrush current: 80A, Steady current: 25A, 

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**----- Start of picture text -----**<br>
20A<br>200ms<br>**----- End of picture text -----**<br>


6-(2). Electrical life test (Lamp load) Sample: CB1F-12V, 5pcs. Load: 45/65Wx5 parallel, 14V DC, halogen lamp actual load Switching frequency: (ON:OFF = 1s:8s) Ambient temperature: Room temperature Circuit 

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**----- Start of picture text -----**<br>
Relay<br>Halogen lamp 12V 45/65W<br>14V DC<br>Observation of load waveform with<br>current probe and digital oscilloscope<br>**----- End of picture text -----**<br>


Change of pick-up and drop-out voltage 

Change of contact resistance 

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**----- Start of picture text -----**<br>
6 50<br>5<br>Pick-up voltage 40<br>Max.<br>4 X<br>Min. 30<br>3<br>20<br>2 Drop-out voltage<br>Max.<br>X<br>Min. 10<br>1<br>Max.<br>X<br>0 0 Min.<br>0 10 20 0 10 20<br>No. of operations, × 10 [4] No. of operations, × 10 [4]<br>Ω<br>Contact resistance, m<br>Pick-up and drop-out voltage, V<br>**----- End of picture text -----**<br>


Load current waveform 

Inrush current: 100A, Steady current: 20A, 

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20.5A<br>200ms<br>**----- End of picture text -----**<br>


ds_61202_0000_en_cb: 200407D 

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CB 

## **CB RELAYS High capacity type (Heat resistant type)** 

1. Ambient temperature and current value in which carry current is possible 

## 2. Max. switching capability 

(High capacity type) 

## 3. Ambient temperature and operating temperature range 

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*Precondition: Initial (Heat resistant type)<br>60 40<br>150<br>140 35<br>50<br>120 30<br>40<br>30A 25 Operation range<br>100<br>40A 30 20<br>80<br>50A 15<br>20<br>60 10<br>60A 10 10 [5]  cycle line<br>40 Actual value 5<br>70A 0 (Max. 1 cycle) 0 Pick-up voltage(Cold start) Drop-out voltage(Cold start)<br>20 0 20 40 60 80 100 -40 -20 0 20 40 60 80 100 120125 140<br>90 100 110 120 130 140 150 Switching current, A Ambient temperature, °C<br>Applied Coil Voltage (% Nominal Voltage)<br>Asssumption:<br>• Maximum mean coil temperature = 180°C<br>• Curves are based on 1.4W (Nominal power consumption<br>of the unsupprressed coil at nominal voltage)<br>4. Distribution of pick-up and drop-out voltage 5. Distribution of operate and release time 6. Contact resistance<br>Sample: CB1aHF-12V, 53pcs. Sample: CB1aHF-12V, 53pcs. Sample: CB1aHF-12V, 53pcs.<br>(By voltage drop 6V DC 1A)<br>70 12 70<br>Pick-up voltage<br>60 Drop-out voltage 10 Operate time 60<br>50 50<br>8<br>40 40<br>6<br>30 30<br>4<br>20 20<br>Release time<br>2<br>10 10<br>0 0 0<br>0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 8 10 12 14 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8<br>Voltage, V Coil voltage, V Resistance, mΩ<br>C°<br>Switching voltage, VDC Coil applied voltage, VDC<br>Maximum Allowable Ambient Temperature,<br>Frequency Frequency<br>Operate and release time, ms<br>**----- End of picture text -----**<br>


## 6-(1). Electrical life test (Motor free) 

Sample: CB1aH-12V, 3pcs. Load: Inrush current: 64A/Steady current: 35A Fan motor actual load (motor free) 12V DC Switching frequency: (ON:OFF = 3s:7s) Ambient temperature: Room temperature Circuit 

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3s 7s<br>10s<br>M<br>**----- End of picture text -----**<br>


Change of pick-up and drop-out voltage 

Change of contact resistance 

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**----- Start of picture text -----**<br>
10 50<br>9<br>8 40<br>7<br>6 30<br>Pick-up voltage<br>5<br>Max.<br>4 X 20<br>Drop-out voltage Min.<br>3<br>Max.<br>2 X 10 Max.<br>Min. X<br>1<br>Min.<br>0 0<br>0 5 10 0 5 10<br>No. of operations, × 10 [4] No. of operations, × 10 [4]<br>Ω<br>Contact resistance, m<br>Pick-up and drop-out voltage, V<br>**----- End of picture text -----**<br>


Load current waveform 

Inrush current: 64A, Steady current: 35A, 

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**----- Start of picture text -----**<br>
10A<br>500ms<br>**----- End of picture text -----**<br>


ds_61202_0000_en_cb: 200407D 

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Change of contact resistance 

## CB 

6-(2). Electrical life test (Motor lock) Sample: CB1aH-12V, 5pcs. Load: 100A 14V DC Magnet clutch actual load (lock condition) Switching frequency: (ON:OFF = 1s:9s) Ambient temperature: Room temperature Circuit 

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Clutch<br>14V DC M (5V DC<br>applied)<br>Lock condition<br>**----- End of picture text -----**<br>


## Change of pick-up and drop-out voltage 

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6 50<br>Pick-up voltage<br>5 Max. 40<br>X<br>4 Min.<br>30<br>3 Max.<br>X 20<br>Min.<br>2<br>Drop-out voltage<br>10 Max.<br>1<br>X<br>Min.<br>0 0<br>0 10 20 40 60 80 100 0 10 20 40 60 80 100<br>No. of operations No. of operations<br>Ω<br>Contact resistance, m<br>Pick-up and drop-out voltage, V<br>**----- End of picture text -----**<br>


Load current waveform 100A 14V DC 

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**----- Start of picture text -----**<br>
20A<br>200ms<br>**----- End of picture text -----**<br>


## **Cautions regarding the protection element** 

## **1. Part numbers without protection elements** 

1) 12 V models 

When connecting a coil surge protection circuit to these relays, we recommend a Zener diode with a Zener voltage of 24 V or higher, or a resistor (680Ω to 1,000Ω). When a diode is connected to the coil in parallel, the release time will slow down and working life may shorten. Before use, please check the circuit and verify that the diode is not connected in parallel to the coil drive circuit. 

2) 24 V models 

When connecting a coil surge protection circuit to these relays, we recommend a Zener diode with a Zener voltage of 48 V or higher, or a resistor (2,800Ω to 4,700Ω). 

When a diode is connected to the coil in parallel, the release time will slow down and working life may shorten. Before use, please check the circuit and verify that the diode is not connected in parallel to the coil drive circuit. 

## **2. Part numbers with diodes** 

These relays use a diode in the coil surge protection element. Therefore, the release time is slower and the working life might be shorter compared to part numbers without protection elements and part numbers with resistors. Be sure to use only after evaluating under actual load conditions. 

## **3. Part numbers with resistors** 

This part number employs a resistor in the coil surge protection circuit; therefore, an external surge protection element is not required. In particular, when a diode is connected in parallel with a coil, the revert time becomes slower which could adversely affect working life. Please check the circuit and make sure that a diode is not connected in parallel with the coil drive circuit. 

## **For Cautions for Use, see Relay Technical Information.** 

ds_61202_0000_en_cb: 200407D 

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## Links

- [View this product on Novapart](https://novapart.co/products/CB1R24/automotive-relay-24-vdc-20-a-spdt-plug-in-quick)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/panasonic/cb1r24/automotive-relay-spdt-24vdc-20a/dp/3288473)
---

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