# Zener Single Diode, 5.1 V, 500 mW, DO-35, 2 Pins, 200 °C, Through Hole

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![Product image](https://novapart.co/image/farnell:1612371/)

**URL**: https://novapart.co/products/1N5231B/zener-single-diode-51-v-500-mw-do-35-2-pins-200-c
**SKU**: 1N5231B
**Manufacturer**: VISHAY
**Category**: Semiconductors - Discretes || Diodes & Rectifiers || Zener Single Diodes
**Price**: €0.0200
**Stock**: 1000+
**Lead Time**: 67 days (indicative)

## Description

The Vishay 1N5231B is a silicon planar power Zener single diode engineered for precision voltage stabilization and regulation circuits. Housed in a through-hole DO-35 package with 2 pins, this component delivers a nominal Zener voltage ($V_Z$) of 5.1 V with a tight standard tolerance of ±5% at thermal equilibrium. It supports a total power dissipation ($P_{tot}$) of 500 mW at lead temperatures ($T_L$) at or below 25 °C, and a maximum operating junction temperature ($T_j$) of 175 °C (with a storage range up to 200 °C max ratings depending on application constraints). Designed for high reliability, the 1N5231B features a test current ($I_{ZT1}$) of 20 mA, a low maximum dynamic impedance ($ZZ$ at $I_{ZT1}$) of 17 $\Omega$, and a maximum reverse leakage current ($I_R$) of 5 $\mu$A at a reverse voltage ($V_R$) of 2 V. 

This AEC-Q101 qualified Zener diode is ideally suited for automotive, industrial, and consumer electronics applications requiring robust voltage reference, clamping, and stabilization. Typical application circuits include low-power linear voltage regulators, overvoltage protection networks, and signal conditioning stages where maintaining a stable reference rail is critical. The DO-35 axial lead package ensures ease of through-hole PCB insertion while providing a junction-to-ambient thermal resistance ($R_{\theta JA}$) of 300 K/W. Compliant with RoHS Directive 2002/95/EC and WEEE 2002/96/EC, and fully halogen-free per IEC 61249-2-21 standards, the 1N5231B provides consistent electrical performance across demanding thermal environments.

## Specifications

| Parameter | Value |
|---|---|
| Svhc | No SVHC (25-Jun-2025) |
| No. Of Pins | 2Pins |
| Product Range | 1N52xxB |
| Qualification | - |
| Diode Mounting | Through Hole |
| Diode Case Style | DO-35 |
| Power Dissipation | 500mW |
| Zener Voltage Nom | 5.1V |
| Operating Temperature Max | 200°C |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:1612371/)

**1N5221B to 1N5267B** 

www.vishay.com 

## Vishay Semiconductors 

## **Small Signal Zener Diodes** 

## **FEATURES** 

- Silicon planar power Zener diodes 

- Standard Zener voltage tolerance is ± 5 % 

- These diodes are also available in MiniMELF case with the type designation TZM5221 to TZM5267, SOT-23 case with the type designations MMBZ5225 to MMBZ5267 and SOD-123 case with the types designations MMSZ5225 to MMSZ5267 

- AEC-Q101 qualified 

## **PRIMARY CHARACTERISTICS** 

|**PRIMARY CHARACTERISTICS**|**PRIMARY CHARACTERISTICS**|**PRIMARY CHARACTERISTICS**|
|---|---|---|
|**PARAMETER**|**VALUE**|**UNIT**|
|VZrange nom.|2.4 to 75|V|
|Test current IZT|1.7 to 20|mA|
|VZspecification|Thermal equilibrium||
|Int. construction|Single||



- Compliant to RoHS Directive 2002/95/EC and in accordance to WEEE 2002/96/EC 

- Halogen-free according to IEC 61249-2-21 definition 

## **APPLICATIONS** 

- Voltage stabilization 

## **ORDERING INFORMATION** 

|**ORDERING INFORMATION**|**ORDERING INFORMATION**|**ORDERING INFORMATION**|**ORDERING INFORMATION**|
|---|---|---|---|
|**DEVICE NAME**|**ORDERING CODE**|**TAPED UNITS PER REEL**|**MINIMUM ORDER QUANTITY**|
|1N5221B to 1N5267B|1N5221B to 1N5267B-series-TR|10 000 per 13" reel|30 000/box|
|1N5221B to 1N5267B|1N5221B to 1N5267B-series-TAP|10 000 per ammopack<br>(52 mm tape)|30 000/box|



## **PACKAGE** 

|**PACKAGE**|**PACKAGE**|**PACKAGE**|**PACKAGE**|**PACKAGE**|
|---|---|---|---|---|
|**PACKAGE NAME**|**WEIGHT**|**MOLDING COMPOUND**<br>**FLAMMABILITY RATING**|**MOISTURE SENSITIVITY**<br>**LEVEL**|**SOLDERING**<br>**CONDITIONS**|
|DO-35|125 mg|UL 94 V-0|MSL level 1<br>(accordingJ-STD-020)|260 °C/10 s at terminals|



## **ABSOLUTE MAXIMUM RATINGS** (Tamb = 25 °C, unless otherwise specified) 

|**ABSOLUTE MAXIMUM RATINGS**(Tamb = 25 °C, unless otherwise specified)Tamb = 25 °C, unless otherwise specified)amb = 25 °C, unless otherwise specified)= 25 °C, unless otherwise specified), unless otherwise specified)unless otherwise specified)pecified)ecified))|**ABSOLUTE MAXIMUM RATINGS**(Tamb = 25 °C, unless otherwise specified)Tamb = 25 °C, unless otherwise specified)amb = 25 °C, unless otherwise specified)= 25 °C, unless otherwise specified), unless otherwise specified)unless otherwise specified)pecified)ecified))|**ABSOLUTE MAXIMUM RATINGS**(Tamb = 25 °C, unless otherwise specified)Tamb = 25 °C, unless otherwise specified)amb = 25 °C, unless otherwise specified)= 25 °C, unless otherwise specified), unless otherwise specified)unless otherwise specified)pecified)ecified))|**ABSOLUTE MAXIMUM RATINGS**(Tamb = 25 °C, unless otherwise specified)Tamb = 25 °C, unless otherwise specified)amb = 25 °C, unless otherwise specified)= 25 °C, unless otherwise specified), unless otherwise specified)unless otherwise specified)pecified)ecified))|**ABSOLUTE MAXIMUM RATINGS**(Tamb = 25 °C, unless otherwise specified)Tamb = 25 °C, unless otherwise specified)amb = 25 °C, unless otherwise specified)= 25 °C, unless otherwise specified), unless otherwise specified)unless otherwise specified)pecified)ecified))|
|---|---|---|---|---|
|**PARAMETER**|**TEST CONDITION**|**SYMBOL**|**VALUE**|**UNIT**|
|Power dissipation|TL ≤25 °C|Ptot|500|mW|
|Zener current||IZ|Ptot/VZ|mA|
|Junction to ambient air|I = 4 mm, TL= constant|RthJA|300|K/W|
|Junction temperature||Tj|175|°C|
|Storage temperature range||Tstg|- 65 to + 175|°C|
|Forward voltage (max.)|IF= 200 mA|VF|1.1|V|



Rev. 1.9, 24-Nov-11 

Document Number: 85588 

**1** 

For technical questions within your region: DiodesAmericas@vishay.com, DiodesAsia@vishay.com, DiodesEurope@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 

**1N5221B to 1N5267B** 

**==> picture [59 x 48] intentionally omitted <==**

www.vishay.com 

## Vishay Semiconductors 

|**ELECTRICAL CHARACTERISTICS**(Tamb= 25 °C,unless otherwise specified)|**ELECTRICAL CHARACTERISTICS**(Tamb= 25 °C,unless otherwise specified)|**ELECTRICAL CHARACTERISTICS**(Tamb= 25 °C,unless otherwise specified)|**ELECTRICAL CHARACTERISTICS**(Tamb= 25 °C,unless otherwise specified)|**ELECTRICAL CHARACTERISTICS**(Tamb= 25 °C,unless otherwise specified)|**ELECTRICAL CHARACTERISTICS**(Tamb= 25 °C,unless otherwise specified)|**ELECTRICAL CHARACTERISTICS**(Tamb= 25 °C,unless otherwise specified)|**ELECTRICAL CHARACTERISTICS**(Tamb= 25 °C,unless otherwise specified)|**ELECTRICAL CHARACTERISTICS**(Tamb= 25 °C,unless otherwise specified)|
|---|---|---|---|---|---|---|---|---|
|**PART NUMBER**|**ZENER VOLTAGE**<br>**RANGE(1)**|**TEST CURRENT**||**REVERSE**<br>**LEAKAGE**<br>**CURRENT**||**DYNAMIC RESISTANCE**||**TEMPERATURE**<br>**COEFFICIENT**|
||**VZ at IZT1**|**IZT1**|**IZT2**|**IR at VR**||**ZZ at IZT1 (1)**|**ZZK at IZT2**|α**VZ**|
||**V**|**mA**||**μA**|**V**|Ω||**%/K**|
||**NOM.**|||**MAX.**||**MAX.**|**MAX.**|**TYP.**|
|1N5221B|2.4|20|0.25|100|1|30|1200|- 0.085|
|1N5222B|2.5|20|0.25|100|1|30|1250|- 0.085|
|1N5223B|2.7|20|0.25|75|1|30|1300|- 0.08|
|1N5224B|2.8|20|0.25|75|1|30|1400|- 0.08|
|1N5225B|3|20|0.25|50|1|29|1600|- 0.075|
|1N5226B|3.3|20|0.25|25|1|28|1600|- 0.07|
|1N5227B|3.6|20|0.25|15|1|24|1700|- 0.065|
|1N5228B|3.9|20|0.25|10|1|23|1900|- 0.06|
|1N5229B|4.3|20|0.25|5|1|22|2000|0.055|
|1N5230B|4.7|20|0.25|5|2|19|1900|0.03|
|1N5231B|5.1|20|0.25|5|2|17|1600|0.03|
|1N5232B|5.6|20|0.25|5|3|11|1600|0.038|
|1N5233B|6|20|0.25|5|3.5|7|1600|0.038|
|1N5234B|6.2|20|0.25|5|4|7|1000|0.045|
|1N5235B|6.8|20|0.25|3|5|5|750|0.05|
|1N5236B|7.5|20|0.25|3|6|6|500|0.058|
|1N5237B|8.2|20|0.25|3|6.5|8|500|0.062|
|1N5238B|8.7|20|0.25|3|6.5|8|600|0.065|
|1N5239B|9.1|20|0.25|3|7|10|600|0.068|
|1N5240B|10|20|0.25|3|8|17|600|0.075|
|1N5241B|11|20|0.25|2|8.4|22|600|0.076|
|1N5242B|12|20|0.25|1|9.1|30|600|0.077|
|1N5243B|13|9.5|0.25|0.5|9.9|13|600|0.079|
|1N5244B|14|9|0.25|0.1|10|15|600|0.082|
|1N5245B|15|8.5|0.25|0.1|11|16|600|0.082|
|1N5246B|16|7.8|0.25|0.1|12|17|600|0.083|
|1N5247B|17|7.4|0.25|0.1|13|19|600|0.084|
|1N5248B|18|7|0.25|0.1|14|21|600|0.085|
|1N5249B|19|6.6|0.25|0.1|14|23|600|0.086|
|1N5250B|20|6.2|0.25|0.1|15|25|600|0.086|
|1N5251B|22|5.6|0.25|0.1|17|29|600|0.087|
|1N5252B|24|5.2|0.25|0.1|18|33|600|0.088|
|1N5253B|25|5|0.25|0.1|19|35|600|0.089|
|1N5254B|27|4.6|0.25|0.1|21|41|600|0.09|
|1N5255B|28|4.5|0.25|0.1|21|44|600|0.091|
|1N5256B|30|4.2|0.25|0.1|23|49|600|0.091|
|1N5257B|33|3.8|0.25|0.1|25|58|700|0.092|
|1N5258B|36|3.4|0.25|0.1|27|70|700|0.093|
|1N5259B|39|3.2|0.25|0.1|30|80|800|0.094|
|1N5260B|43|3|0.25|0.1|33|93|900|0.095|
|1N5261B|47|2.7|0.25|0.1|36|105|1000|0.095|
|1N5262B|51|2.5|0.25|0.1|39|125|1100|0.096|
|1N5263B|56|2.2|0.25|0.1|43|150|1300|0.096|
|1N5264B|60|2.1|0.25|0.1|46|170|1400|0.097|
|1N5265B|62|2|0.25|0.1|47|185|1400|0.097|
|1N5266B|68|1.8|0.25|0.1|52|230|1600|0.097|
|1N5267B|75|1.7|0.25|0.1|56|270|1700|0.098|



## **Note** 

> (1) Based on DC measurement at thermal equilibrium; lead length = 9.5 (3/8"); thermal resistance of heat sink = 30 K/W 

Rev. 1.9, 24-Nov-11 

Document Number: 85588 

**2** 

For technical questions within your region: DiodesAmericas@vishay.com, DiodesAsia@vishay.com, DiodesEurope@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 

**1N5221B to 1N5267B** 

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**----- Start of picture text -----**<br>
www.vishay.com<br>**----- End of picture text -----**<br>


## Vishay Semiconductors 

## **BASIC CHARACTERISTICS** (Tamb = 25 °C, unless otherwise specified) 

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500<br>400<br>300<br>l l<br>200<br>100<br>TL = constant<br>0<br>0 5 10 15 20<br>I - Lead Length (mm) 95 9611<br> - Therm. Resist. Junction Ambient (K/W)<br>thJA<br>R<br>**----- End of picture text -----**<br>


Fig. 1 - Thermal Resistance vs. Lead Length 

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**----- Start of picture text -----**<br>
600<br>500<br>400<br>300<br>200<br>100<br>0<br>0 40 80 120 160 200<br>95 9602 Tamb - Ambient Temperature (°C)<br> - Total Power Dissipation (mW)<br>tot<br>P<br>**----- End of picture text -----**<br>


Fig. 4 - Total Power Dissipation vs. Ambient Temperature 

**==> picture [163 x 372] intentionally omitted <==**

**----- Start of picture text -----**<br>
1000<br>T j  = 25 °C<br>100<br>I Z  = 5 mA<br>10<br>1<br>0 5 10 15 20 25<br>95 9598 VZ - Z-Voltage (V)<br>Typical Change of Working Voltage under Operating<br>Conditions at Tamb= 25 °Camb= 25 °C= 25 °C<br>1.3<br>VZtn = VZt/VZ (25 °C)<br>1.2<br>TKVZ = 10 x 10 [-4] /K<br>8 x 10 [-4] /K<br>6 x 10 [-4] /K<br>1.1<br>4 x 10 [-4] /K<br>2 x 10 [-4] /K<br>1.0 0<br>- 2 x 10 [-4] /K<br>0.9 - 4 x 10 [-4] /K<br>0.8<br>- 60 0 60 120 180 240<br>95 9599 Tj - Junction Temperature (°C)<br> - Voltage Change (mV)<br>Z<br>V<br> - Relative Voltage Change<br>Ztn<br>V<br>**----- End of picture text -----**<br>


Fig. 2 - Typical Change of Working Voltage under Operating Conditions at Tamb= 25 °Camb= 25 °C= 25 °C 

Fig. 3 - Typical Change of Working Voltage vs. Junction Temperature 

**==> picture [168 x 370] intentionally omitted <==**

**----- Start of picture text -----**<br>
15<br>10<br>5<br> IZ = 5 mA<br>0<br>- 5<br>0 10 20 30 40 50<br>95 9600 VZ - Z-Voltage (V)<br>Temperature Coefficient of VZ vs. Z-VoltageZ vs. Z-Voltage vs. Z-Voltage<br>200<br>150<br>VR = 2 V<br>Tj = 25 °C<br>100<br>50<br>0<br>0 5 10 15 20 25<br>95 9601 VZ - Z-Voltage (V)<br>/K)<br>-4<br> (10<br>Z<br>of V<br> - Temperature Coefficient<br>VZ<br>TK<br> - Diode Capacitance (pF)<br>D<br>C<br>**----- End of picture text -----**<br>


Fig. 5 - Temperature Coefficient of VZ vs. Z-VoltageZ vs. Z-Voltage vs. Z-Voltage 

Fig. 6 - Diode Capacitance vs. Z-Voltage 

Rev. 1.9, 24-Nov-11 

Document Number: 85588 

**3** 

For technical questions within your region: DiodesAmericas@vishay.com, DiodesAsia@vishay.com, DiodesEurope@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 

**1N5221B to 1N5267B** 

**==> picture [59 x 48] intentionally omitted <==**

## www.vishay.com 

## Vishay Semiconductors 

**==> picture [168 x 154] intentionally omitted <==**

**----- Start of picture text -----**<br>
100<br>10<br>T j  = 25 °C<br>1<br>0.1<br>0.01<br>0.001<br>0 0.2 0.4 0.6 0.8 1.0<br>95 9605 VF - Forward Voltage (V)<br> - Forward Current (mA)<br>IF<br>**----- End of picture text -----**<br>


Fig. 7 - Forward Current vs. Forward Voltage 

**==> picture [165 x 156] intentionally omitted <==**

**----- Start of picture text -----**<br>
100<br>80<br>Ptot = 500 mW<br>Tamb = 25 °C<br>60<br>40<br>20<br>0<br>0 4 6 8 12 20<br>95 9604 VZ - Z-Voltage (V)<br> - Z-Current (mA)<br>IZ<br>**----- End of picture text -----**<br>


Fig. 8 - Z-Current vs. Z-Voltage 

**==> picture [163 x 372] intentionally omitted <==**

**----- Start of picture text -----**<br>
50<br>40 P tot  = 500 mW<br>Tamb = 25 °C<br>30<br>20<br>10<br>0<br>15 20 25 30 35<br>95 9607 VZ - Z-Voltage (V)<br> Fig. 9 - Z-Current vs. Z-Voltage<br>1000<br>IZ = 1 mA<br>100<br>5 mA<br>10 10 mA<br>1 Tj = 25 °C<br>0 5 10 15 20 25<br>95 9606 VZ - Z-Voltage (V)<br> - Z-Current (mA)<br>IZ<br>)Ω<br> - Differential Z-Resistance (<br>rZ<br>**----- End of picture text -----**<br>


Fig. 10 - Differential Z-Resistance vs. Z-Voltage 

**==> picture [378 x 192] intentionally omitted <==**

**----- Start of picture text -----**<br>
1000<br>t p /T = 0.5<br>100<br>t p /T = 0.2<br>Single Pulse RthJA = 300 K/W<br>T = Tjmax - Tamb<br>10 tp/T = 0.01<br>t p /T = 0.1 t p /T = 0.02<br>tp/T = 0.05 i ZM  = (- V Z  + (V Z2  + 4r zj  x T/Z thp )  1/2 )/(2r zj )<br>1<br>10 [-1] 10 [0] 10 [1] 10 [2]<br>tp - Pulse Length (ms) 95 9603<br> Fig. 11 - Thermal Response<br> - Thermal Resistance for Pulse Cond. (KW)<br>thp<br>Z<br>**----- End of picture text -----**<br>


Rev. 1.9, 24-Nov-11 

Document Number: 85588 

**4** 

For technical questions within your region: DiodesAmericas@vishay.com, DiodesAsia@vishay.com, DiodesEurope@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 

**1N5221B to 1N5267B** 

Vishay Semiconductors 

**==> picture [59 x 48] intentionally omitted <==**

**==> picture [78 x 10] intentionally omitted <==**

**----- Start of picture text -----**<br>
www.vishay.com<br>**----- End of picture text -----**<br>


## **PACKAGE DIMENSIONS** in millimeters (inches): **DO-35** 

**==> picture [391 x 124] intentionally omitted <==**

**----- Start of picture text -----**<br>
Cathode identification<br>26 (1.024) min.  3.9 (0.154) max.  26 (1.024) min.<br>0.55. (0.022) max.<br>1.7 (0.067) 1.5 (0.059)<br>**----- End of picture text -----**<br>


Rev. 6 - Date: 29. January 2007 Document no.: 6.560-5004.02-4 94 9366 

Rev. 1.9, 24-Nov-11 

Document Number: 85588 

**5** 

For technical questions within your region: DiodesAmericas@vishay.com, DiodesAsia@vishay.com, DiodesEurope@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 

**Legal Disclaimer Notice** 

Vishay 

**==> picture [59 x 48] intentionally omitted <==**

## **Disclaimer** 

ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE. 

Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively, “Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained in any datasheet or in any other disclosure relating to any product. 

Vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or the continuing production of any product.  To the maximum extent permitted by applicable law, Vishay disclaims (i) any and all liability arising out of the application or use of any product, (ii) any and all liability, including without limitation special, consequential or incidental damages, and (iii) any and all implied warranties, including warranties of fitness for particular purpose, non-infringement and merchantability. 

Statements regarding the suitability of products for certain types of applications are based on Vishay’s knowledge of typical requirements that are often placed on Vishay products in generic applications.  Such statements are not binding statements about the suitability of products for a particular application.  It is the customer’s responsibility to validate that a particular product with the properties described in the product specification is suitable for use in a particular application.  Parameters provided in datasheets and/or specifications may vary in different applications and performance may vary over time.  All operating parameters, including typical parameters, must be validated for each customer application by the customer’s technical experts. Product specifications do not expand or otherwise modify Vishay’s terms and conditions of purchase, including but not limited to the warranty expressed therein. 

Except as expressly indicated in writing, Vishay products are not designed for use in medical, life-saving, or life-sustaining applications or for any other application in which the failure of the Vishay product could result in personal injury or death. Customers using or selling Vishay products not expressly indicated for use in such applications do so at their own risk and agree to fully indemnify and hold Vishay and its distributors harmless from and against any and all claims, liabilities, expenses and damages arising or resulting in connection with such use or sale, including attorneys fees, even if such claim alleges that Vishay or its distributor was negligent regarding the design or manufacture of the part.  Please contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for such applications. 

No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document or by any conduct of Vishay.  Product names and markings noted herein may be trademarks of their respective owners. 

Document Number: 91000 Revision: 11-Mar-11 

www.vishay.com 1 



## Links

- [View this product on Novapart](https://novapart.co/products/1N5231B/zener-single-diode-51-v-500-mw-do-35-2-pins-200-c)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/vishay/1n5231b/diode-zener-0-5w-5-1v-do-35/dp/1612371)
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