# TVS Diode, SMAJ, Unidirectional, 18 V, 32.2 V, DO-214AC (SMA), 2 Pins

![Product image](https://novapart.co/image/farnell:2675291RL/)

**URL**: https://novapart.co/products/SMAJ18A/tvs-diode-smaj-unidirectional-18-v-322-do-214ac
**SKU**: SMAJ18A
**Manufacturer**: MULTICOMP PRO
**Category**: Circuit Protection || TVS - Transient Voltage Suppressors || TVS Diodes
**Price**: €0.0900
**Stock**: 1000+
**Lead Time**: 145 days (indicative)

## Description

Product Range:SMAJ Series; TVS Polarity:Unidirectional; Reverse Stand-Off Voltage Vrwm:18V; Clamping Voltage Vc Max:32.2V; Diode Case Style:DO-214AC; No. of Pins:2Pins; Breakdown V

## Specifications

| Parameter | Value |
|---|---|
| Svhc | Lead (25-Jun-2025) |
| No. Of Pins | 2Pins |
| Tvs Polarity | Unidirectional |
| Product Range | SMAJ |
| Qualification | - |
| Diode Mounting | Surface Mount |
| Diode Case Style | DO-214AC (SMA) |
| Clamping Voltage Max | 32.2V |
| Reverse Standoff Voltage | 18V |
| Maximum Breakdown Voltage | 24.4V |
| Minimum Breakdown Voltage | 20V |
| Operating Temperature Max | 150°C |
| Peak Pulse Power Dissipation | 400W |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:2675291RL/)

**Unidirectional and Bidirectional Surface Mount Transient Voltage Suppressor** 

## **Features:** 

- Rating to 200V Vbr 

- For surface mounted applications 

- Reliable low cost construction utilizing molded plastic technique 

- Plastic material has UL recognition 94V-0 

- Typical IR less than 1μA above 10V 

- Fast response time : typically less than 1.0ns for Uni-direction, less than 5.0ns fo Bi-direction, from 0 Volts to BV min 

## **Mechanical Data:** 

Case : Molded Plastic Polarity :  Cathode band denotes uni-directional device No cathode band denotes bi-directional device Weight : 0.002 ounces, 0.053 grams Reverse Voltage : 5 to 170 Volts Power Dissipation : 400 Watts 

## **Maximum Ratings and Electrical Characteristics:** 

Rating at 25°C ambient temperature unless otherwise specified. Single phase, half wave, 60Hz, resistive or inductive load. For capacitive load, derate current by 20% 

|For capacitive load, derate current by 20%||||
|---|---|---|---|
|**Characteristics**|**Symbol**|**Values**|**Unit**|
|Peak Power Dissipation at Ta = 25°C<br>TP = 1ms(Note 1, 2)|PPk|Min. 400|Watts|
|Peak Forward Surge Current<br>8.3ms Single Half Sine-Wave<br>Super Imposed on Rated Load(JEDEC Method)|Ifsm|40|Amps|
|SteadyState Power Dissipation at Tl = 75°C|PM(AV)|1|Watts|
|Max. Instantaneous Forward Voltage<br>at 50A for Uni-Directional Devices Only (Note 3)|Vf|3.5|Volts|
|OperatingTemperature Range|Tj|-55 to +150|°C|
|Storage Temperature Range|Tstg|-55 to +175|°C|



## **Notes:** 

1. Non-repetitive current pulse ,per Fig. 3 and derated above Ta = 25°C per Fig. 1. 

2. Thermal Resistance junction to Lead. 

3. 8.3ms single half-wave duty cycle=4 pulses per minutes maximum (uni-directional units only). 

Newark.com/multicomp-pro Farnell.com/multicomp-pro Element14.com/multicomp-pro 

21/10/19 V1.0 

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## **Unidirectional and Bidirectional Surface Mount Transient Voltage Suppressor** 

|**Part Number**|**Part Number**|**Working**<br>**Peak**<br>**Reverse**<br>**Voltage**|**Breakdown Voltage**<br>**VBR Volts**|**Breakdown Voltage**<br>**VBR Volts**|**Breakdown Voltage**<br>**VBR Volts**|**Max. Reverse**<br>**Voltage at Irsm**<br>**(Clamping**<br>**Voltage)**|**Max.**<br>**Reverse Surge**<br>**Current**|**Max.**<br>**Reverse**<br>**Leakage**<br>**at Vrwm**|
|---|---|---|---|---|---|---|---|---|
|**Device**<br>**Unidirectional**|**Device**<br>**Bidirectional**|**Vrwm (V)**|**Min.**<br>**(V)**|**Max.**<br>**(V)**|**It(mA)**|**Vrsm (V)**|**Irsm (Amps)**|**IR (μA)**|
|SMAJ10A+|SMAJ10CA+|10|11.1|12.3|1|17|23.5|5/10|
|-|SMAJ11CA+|11|12.2|13.5|1|18.2|22|5|
|SMAJ120A+|-|120|133|147|1|193|2|5|
|SMAJ12A+|SMAJ12CA+|12|13.3|14.7|1|19.9|20.1|5|
|SMAJ13A+|SMAJ13CA+|13|14.4|15.9|1|21.5|18.6|5|
|SMAJ150A+|SMAJ150CA+|150|167|185|1|243|1.6|5|
|SMAJ15A+|SMAJ15CA+|15|16.7|18.5|1|24.4|16.4|5|
|SMAJ16A+|-|16|17.8|19.7|1|26|15.3|5|
|SMAJ18A+|SMAJ18CA+|18|20|22.1|1|29.2|13.7|5|
|SMAJ20A+|SMAJ20CA+|20|22.2|24.5|1|32.4|12.3|5|
|SMAJ22A+|-|22|24.4|26.9|1|35.5|11.2|5|
|SMAJ24A+|SMAJ24CA+|24|26.7|29.5|1|38.9|10.3|5|
|SMAJ26A+|SMAJ26CA+|26|28.9|31.9|1|42.1|9.5|5|
|SMAJ28A+|-|28|31.1|34.4|1|45.4|8.8|5|
|SMAJ30A+|SMAJ30CA+|30|33.3|36.8|1|48.4|8.3|5|
|SMAJ33A+|SMAJ33CA+|33|36.7|40.6|1|53.3|7.5|5|
|SMAJ36A+|SMAJ36CA+|36|40|44.2|1|58.1|6.9|5|
|SMAJ40A+|SMAJ40CA+|40|44.4|49.1|1|64.5|6.2|5|
|-|SMAJ43CA+|43|47.8|52.8|1|69.4|5.7|5|
|-|SMAJ48CA+|48|53.3|58.9|1|77.4|5.2|5|
|SMAJ5.0A+|SMAJ5.0CA+|5|6.4|7|10|9.2|43.5|800/1600|
|SMAJ51A+|SMAJ51CA+|51|56.7|62.7|1|82.4|4.9|5|
|SMAJ54A+|SMAJ54CA+|54|60|66.3|1|87.1|4.6|5|
|SMAJ58A+|SMAJ58CA+|58|64.4|71.2|1|93.6|4.3|5|
|SMAJ6.0A+|-|6|6.67|7.37|10|10.3|38.8|800/1600|
|SMAJ6.5A+|-|6.5|7.22|7.98|10|11.2|35.7|500/1000|
|SMAJ60A+|-|60|66.7|73.7|1|96.8|4.1|5|
|SMAJ64A+|-|64|71.1|78.6|1|103|3.9|5|
|-|SMAJ7.0CA+|7|7.78|8.6|10|12|33.3|200/400|
|SMAJ7.5A+|-|7.5|8.33|9.21|1|12.9|31|100/200|
|SMAJ8.5A+|-|8.5|9.44|10.4|1|14.4|27.7|10/20|
|-|SMAJ9.0CA+|9|10|11.1|1|15.4|26|5/10|



Newark.com/multicomp-pro Farnell.com/multicomp-pro Element14.com/multicomp-pro 

21/10/19 V1.0 

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## **Unidirectional and Bidirectional Surface Mount Transient Voltage Suppressor** 

## **Ratings and Characteristic Curves** 

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Newark.com/multicomp-pro Farnell.com/multicomp-pro Element14.com/multicomp-pro 

21/10/19 V1.0 

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## **Unidirectional and Bidirectional Surface Mount Transient Voltage Suppressor** 

## **Dimensions:** 

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Dimensions : Inches (Millimetres) 

## **Part Number Table** 

|**Description**|**Part Number**||**Description**|**Part Number**<br>SMAJ22A+<br>SMAJ24A+<br>SMAJ24CA+<br>SMAJ26A+<br>SMAJ26CA+<br>SMAJ28A+<br>SMAJ30A+<br>SMAJ30CA+<br>SMAJ33A+<br>SMAJ33CA+<br>SMAJ36A+<br>SMAJ36CA+<br>SMAJ40A+<br>SMAJ40CA+<br>SMAJ43CA+<br>SMAJ48CA+<br>SMAJ5.0A+|**Description**<br>Surface Mount<br>Unidirectional<br>and Bidirectional<br>Transient Voltage<br>Suppressors|**Part Number**|
|---|---|---|---|---|---|---|
|Surface Mount<br>Unidirectional<br>and Bidirectional<br>Transient Voltage<br>Suppressors|SMAJ10A+||Surface Mount<br>Unidirectional<br>and Bidirectional<br>Transient Voltage<br>Suppressors|||SMAJ5.0CA+|
||SMAJ10CA+|||||SMAJ51A+|
||SMAJ11CA+|||||SMAJ51CA+|
||SMAJ120A+|||||SMAJ54A+|
||SMAJ12A+|||||SMAJ54CA+|
||SMAJ12CA+|||||SMAJ58A+|
||SMAJ13A+|||||SMAJ58CA+|
||SMAJ13CA+|||||SMAJ6.0A+|
||SMAJ150A+|||||SMAJ6.5A+|
||SMAJ150CA+|||||SMAJ60A+|
||SMAJ15A+|||||SMAJ64A+|
||SMAJ15CA+|||||SMAJ7.0CA+|
||SMAJ16A+|||||SMAJ7.5A+|
||SMAJ18A+|||||SMAJ8.5A+|
||SMAJ18CA+|||||SMAJ9.0CA+|
||SMAJ20A+||||||
||SMAJ20CA+||||||



**Important Notice :** This data sheet and its contents (the “Information”) belong to the members of the AVNET group of companies (the “Group”) or are licensed to it. No licence is granted for the use of it other than for information purposes in connection with the products to which it relates. No licence of any intellectual property rights is granted. The Information is subject to change without notice and replaces all data sheets previously supplied. The Information supplied is believed to be accurate but the Group assumes no responsibility for its accuracy or completeness, any error in or omission from it or for any use made of it. Users of this data sheet should check for themselves the Information and the suitability of the products for their purpose and not make any assumptions based on information included or omitted. Liability for loss or damage resulting from any reliance on the Information or use of it (including liability resulting from negligence or where the Group was aware of the possibility of such loss or damage arising) is excluded. This will not operate to limit or restrict the Group’s liability for death or personal injury resulting from its negligence. Multicomp Pro is the registered trademark of Premier Farnell Limited 2019. 

Newark.com/multicomp-pro Farnell.com/multicomp-pro Element14.com/multicomp-pro 

21/10/19 V1.0 

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## Links

- [View this product on Novapart](https://novapart.co/products/SMAJ18A/tvs-diode-smaj-unidirectional-18-v-322-do-214ac)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/multicomp-pro/smaj18a/tvs-diode-400w-18v-unidir-do-214ac/dp/2675291RL)
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