# Zener Single Diode, 12 V, 500 mW, DO-35, 2 Pins, 175 °C, Through Hole
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**URL**: https://novapart.co/products/1N5242B/zener-diode-500mw-12v-do-35
**SKU**: 1N5242B
**Manufacturer**: MULTICOMP PRO
**Category**: Semiconductors - Discretes || Diodes & Rectifiers || Zener Single Diodes
**Price**: €0.0170
**Stock**: 1000+
**Lead Time**: 169 days (indicative)
## Description
The 1N5242B is a glass-encapsulated silicon Zener diode designed for voltage regulation and transient suppression applications. Featuring a nominal Zener voltage of 12 V with a 5% tolerance, this component is housed in a standard DO-35 axial-lead package suitable for through-hole PCB mounting. The device is rated for a maximum power dissipation of 500 mW, provided that lead temperatures are maintained at ambient levels at a distance of 8 mm from the glass body. With a maximum junction temperature of 175 °C and a thermal resistance (junction to ambient) of 0.3 K/mW, it offers robust thermal performance for demanding industrial environments.
This Zener diode is characterized by a maximum Zener impedance of 30 Ω at a test current of 20 mA, ensuring stable voltage regulation across varying load conditions. It exhibits a typical temperature coefficient of +0.077%/°C and a maximum reverse leakage current of 1 µA at 9.1 V. The 1N5242B is constructed with a double-slug glass package, providing high reliability and consistent electrical characteristics. It is well-suited for use in voltage reference circuits, signal clipping, and overvoltage protection in general-purpose electronic assemblies. The device terminals are solder-plated to facilitate standard soldering processes per MIL-STD-750, Method 2026.
## Specifications
| Parameter | Value |
|---|---|
| Svhc | Lead (25-Jun-2025) |
| No. Of Pins | 2Pins |
| Product Range | - |
| Qualification | - |
| Diode Mounting | Through Hole |
| Diode Case Style | DO-35 |
| Power Dissipation | 500mW |
| Zener Voltage Nom | 12V |
| Operating Temperature Max | 175°C |
## Datasheet
📄 [Download PDF](https://novapart.co/datasheet/farnell:2748150/)
## **Glass Silicon Zener Diodes**
## **Features**
Voltage Range : 3.6V to 51V Double slug type construction
## **Mechanical Data**
Case : Glass case Minimelf DL-35 Terminals : Solder plated, solderable per MIL-STD-750, Method 2026 Polarity : Colour band denotes cathode end Mounting position : Any Weight : 0.05 gram Approx
## **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%.
|**Characteristic**|**Symbol**|**Value**|**Unit**|
|---|---|---|---|
|Power Dissipation at Tamb= 25°C|Ptot|500*|mW|
|Junction Temperature|Tj|175|°C|
|Storage Temperature Range|Tstg|-55 to +175|°C|
|Thermal Resistance
Junction to Ambient Air|RθJA|0.3|k/mW (Max.)|
|Forward Voltage Typ
at If = 100mA|Vf|1|Volts (Max.)|
* Valid Provided that leads are kept at ambient temperature at a distance of 8mm from case
**Notes** : Suffix “B” indicates Zener Voltage Tolerance 5%
**Specification Table**
|**Part Number**
~~re~~
~~a~~|**Nominal**
**Zener**
**Voltage**
**Vz@Izt**
~~re~~
~~a~~|**Zener**
**Test**
**Current**
**Izt**
~~re~~
~~a~~|**Max. Zener Impedance**
~~re~~|**Max. Zener Impedance**
~~re~~|**Typical**
**Coefficient**
**Temperature**
~~ee~~
~~a~~|**Max. Reverse**
**Leakage Current**
~~ee~~|**Max. Reverse**
**Leakage Current**
~~ee~~|**Max.**
**Regulator**
**Current**
~~ee~~|
|---|---|---|---|---|---|---|---|---|
||||**Zzt@Izt**
~~re~~
~~a~~|**Zzt@Izk(*)=0.25mA**
~~re~~
~~a~~||**Ir**
~~ee~~
~~a~~|**@Vr**
~~ee~~
~~a~~|**Izm**
~~ee~~
~~a~~|
|1N5231B+
~~a~~|5.1
~~a~~
~~es~~|20
~~a~~
~~es~~|17
~~a~~
~~eG~~|1600
~~a~~
~~eG~~|±0.03
~~a~~
~~eG~~|5
~~a~~
~~eG~~|2
~~a~~
~~eG~~|89
~~a~~
~~eG~~|
|1N5232B+
~~I~~|5.6
~~I~~
~~es~~|20
~~I~~
~~es~~|11
~~I~~
~~eG~~|1600
~~I~~
~~eG~~|+0.038
~~I~~
~~eG~~|5
~~I~~
~~eG~~|3
~~I~~
~~eG~~|81
~~I~~
~~eG~~|
|1N5234B+
~~ee~~|6.2
~~es~~
~~ee~~|20
~~es~~
~~ee~~|7
~~eG~~
~~ee~~|1000
~~eG~~
~~ee~~|+0.045
~~eG~~
~~ee~~|5
~~eG~~
~~ee~~|4
~~eG~~
~~ee~~|73
~~eG~~
~~ee~~|
|1N5236B+
~~ee~~|7.5
~~ee~~|20
~~ee~~|6
~~ee~~|500
~~ee~~|+0.058
~~ee~~|3
~~ee~~|6
~~ee~~|61
~~ee~~|
|1N5240B+
~~tt~~|10
~~tt~~|20
~~tt~~|17
~~tt~~|600
~~tt~~|+0.075
~~tt~~|3
~~tt~~|8
~~tt~~|45
~~tt~~|
|1N5242B +
~~tt~~|12
~~tt~~|20
~~tt~~|30
~~tt~~|600
~~tt~~|+0.077
~~tt~~|1
~~tt~~|9.1
~~tt~~|38
~~tt~~|
|1N5245B+
~~tt~~|15
~~tt~~|8.5
~~tt~~|16
~~tt~~|600
~~tt~~|+0.082
~~tt~~|0.1
~~tt~~|11
~~tt~~|30
~~tt~~|
Newark.com/multicomp-pro Farnell.com/multicomp-pro Element14.com/multicomp-pro
Page <1> 10/09/19 V1.0
## **Glass Silicon Zener Diodes**
## **Dimensions:**
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DO - 35
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Dimensions : Millimetres
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## **Part Number Table**
||**Description**|**Part Number**|
|---|---|---|
||Zener Diode, 5.1V DO-35 500mW|1N5231B+|
||Zener Diode, 5.6V DO-35 500mW|1N5232B+|
||Zener Diode, 6.2V DO-35 500mW|1N5234B+|
||Zener Diode, 7.5V DO-35 500mW|1N5236B+|
||Zener Diode, 10V DO-35 500mW|1N5240B+|
||Zener Diode, 12V DO-35 500mW|1N5242B +|
||Zener Diode, 15V DO-35 500mW|1N5245B+|
**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
10/09/19 V1.0
Page <2>
## Links
- [View this product on Novapart](https://novapart.co/products/1N5242B/zener-diode-500mw-12v-do-35)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/multicomp-pro/1n5242b/zener-diode-0-5w-12v-do-35/dp/2748150)
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