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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

onsemi 1N5241B_S00Z

Name: 1N5241B_S00Z
Brand: onsemi
SKU: 1N5241B_S00Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N5241B_S00Z

Manufacturer:: onsemi

Category:: Single Zener Diodes

Package:: DO-204AH, DO-35, Axial

Datasheet:: 1N5241B_S00Z.pdf

Description:: DIODE ZENER 11V 500MW DO35

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Product details

Overview

1N5241B_S00Z from ON Semiconductor is a 5% tolerance, 11 V Zener diode in DO-35 glass package, rated for 500 mW power dissipation at 25°C, with 22 Ω dynamic impedance at 20 mA test current and ±0.076 %/°C temperature coefficient - used for precision voltage reference and overvoltage protection in low-power analog circuits.

For engineers reviewing the 1N5241B_S00Z datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, thermal derating behavior, cathode identification, and direct alternatives for voltage regulation design-in.

Technical Context

This device operates as a reverse-biased silicon Zener diode, maintaining stable 11 V regulation across 0.25 mA to 20 mA current range. Its DO-35 hermetically sealed glass package ensures long-term stability and low leakage (≤2.0 μA at 8.4 V), with junction temperature range from –65°C to +200°C.

Thermal derating begins above 50°C at 4.0 mW/°C, limiting usable power in high-ambient environments. The cathode band marking and 1.2 V forward voltage (max at 200 mA) support unambiguous polarity identification and bidirectional circuit analysis.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	11.0 V nominal, min 10.45 V / max 11.55 V at I_Z = 20 mA - defines regulated output voltage under standard test conditions
Dynamic Impedance (Z_Z)	22 Ω at I_Z = 20 mA - determines voltage deviation under load transients; lower value improves regulation accuracy
Power Dissipation (P_D)	500 mW at T_A = 25°C - sets maximum continuous DC power before thermal shutdown or degradation
Temperature Coefficient (TC)	±0.076 %/°C - quantifies V_Z drift per degree Celsius; enables compensation in wide-temperature designs
Reverse Leakage (I_R)	≤2.0 μA at V_R = 8.4 V - ensures minimal standby current in battery-powered voltage monitor circuits
Forward Voltage (V_F)	≤1.2 V at I_F = 200 mA - supports use as clamping diode in bidirectional protection schemes

Pinout & Package

DO-35 glass axial package with cathode identified by color band; leads are tinned copper-clad steel, 0.533 mm diameter, 3.05 mm body length, 4.56 mm overall length. Hermetically sealed for moisture resistance and long-term parameter stability.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal	Connects to lower-potential node in reverse-bias regulation; carries full load current during clamping
Cathode	Zener breakdown terminal	Marked with color band; connects to higher-potential node; defines regulated voltage reference point

Key Features

Feature	Design Value
5% Zener voltage tolerance	Enables cost-effective selection without trimming while meeting ±0.55 V regulation window for 11 V rails
Hermetic DO-35 glass package	Provides >10-year parametric stability in industrial environments with humidity up to 95% RH
Low leakage current	Supports microamp-level standby operation in energy-harvesting and IoT sensor nodes
Controlled temperature coefficient	Allows predictable V_Z shift in automotive cabin modules operating from –40°C to +125°C ambient

Applications

Voltage Reference for ADC	Overvoltage Clamp in Power Supply
Use Scenario: Providing stable 11 V reference to 12-bit SAR ADC in industrial data acquisition module. IC Role / Device Role / Timing Role: Precision voltage reference source establishing full-scale input range. Use Value: 22 Ω Z_Z and ±0.076 %/°C TC ensure <±0.3 LSB error over 0–70°C operating range.	Use Scenario: Clamping 12 V rail against transient surges in automotive body control unit. IC Role / Device Role / Timing Role: Shunt overvoltage protector diverting excess current when rail exceeds 11 V. Use Value: 500 mW rating and 2.0 μA leakage enable reliable clamping without loading normal operation.
Low-Power Sensor Biasing	Microcontroller Reset Circuit
Use Scenario: Biasing bridge amplifier in battery-powered gas sensor with 3.3 V MCU interface. IC Role / Device Role / Timing Role: Stable bias voltage generator referenced to ground. Use Value: DO-35 package and ≤2.0 μA leakage extend coin-cell life beyond 2 years at 10 μA average system current.	Use Scenario: Generating reset signal for STM32F4 MCU when 3.3 V supply drops below threshold. IC Role / Device Role / Timing Role: Zener-based brown-out detection element in RC reset network. Use Value: Tight 5% V_Z tolerance ensures reset triggers within ±0.165 V of 3.3 V nominal supply.

Voltage Reference for ADC

Overvoltage Clamp in Power Supply

Use Scenario: Providing stable 11 V reference to 12-bit SAR ADC in industrial data acquisition module.

IC Role / Device Role / Timing Role: Precision voltage reference source establishing full-scale input range.

Use Value: 22 Ω Z_Z and ±0.076 %/°C TC ensure <±0.3 LSB error over 0–70°C operating range.

Use Scenario: Clamping 12 V rail against transient surges in automotive body control unit.

IC Role / Device Role / Timing Role: Shunt overvoltage protector diverting excess current when rail exceeds 11 V.

Use Value: 500 mW rating and 2.0 μA leakage enable reliable clamping without loading normal operation.

Low-Power Sensor Biasing

Microcontroller Reset Circuit

Use Scenario: Biasing bridge amplifier in battery-powered gas sensor with 3.3 V MCU interface.

IC Role / Device Role / Timing Role: Stable bias voltage generator referenced to ground.

Use Value: DO-35 package and ≤2.0 μA leakage extend coin-cell life beyond 2 years at 10 μA average system current.

Use Scenario: Generating reset signal for STM32F4 MCU when 3.3 V supply drops below threshold.

IC Role / Device Role / Timing Role: Zener-based brown-out detection element in RC reset network.

Use Value: Tight 5% V_Z tolerance ensures reset triggers within ±0.165 V of 3.3 V nominal supply.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener diode applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N4740A	10 V nominal Zener, 5% tolerance, 1.0 W power rating, DO-41 package	Higher power handling but larger footprint; less precise TC (±0.05 %/°C)	Select when 10 V reference is acceptable and board space allows DO-41
BZX55C11	11 V nominal Zener, 5% tolerance, 500 mW, DO-35 package, but ±5% V_Z at I_Z = 5 mA	Same voltage and package, but higher Z_Z (30 Ω) and looser test current condition	Acceptable for non-critical references where 20 mA test current alignment is not required

Compared with 1N4740A and BZX55C11, the 1N5241B_S00Z offers tighter regulation at 20 mA with verified 22 Ω Z_Z, making it preferred for precision analog interfaces where load current consistency matters.

Availability

1N5241B_S00Z is available at Aetrix Electronics and suitable for voltage reference, overvoltage protection, and low-power sensor biasing requiring stable component supply across industrial, automotive, and IoT production programs.

Supply support for 1N5241B_S00Z includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

ON Semiconductor is a global semiconductor supplier delivering energy-efficient, high-performance silicon solutions for automotive, industrial, cloud computing, and consumer electronics.

The 1N52xxB series is part of ON Semiconductor's legacy Zener diode portfolio designed for general-purpose voltage regulation and protection in cost-sensitive, space-constrained PCB layouts.

FAQ

What is the exact Zener voltage range for 1N5241B_S00Z at 20 mA?

The 1N5241B_S00Z has a guaranteed Zener voltage range of 10.45 V (minimum) to 11.55 V (maximum) when tested at 20 mA and 25°C ambient, per ON Semiconductor's 1N5221B–1N5263B Rev. 3 datasheet. This 5% tolerance window reflects manufacturing spread and is validated under thermal equilibrium conditions with 3/8″ lead length.

Does 1N5241B_S00Z have a specified forward voltage?

Yes, the 1N5241B_S00Z specifies a maximum forward voltage of 1.2 V at 200 mA forward current. This parameter is documented in the "Electrical Characteristics" table on page 2 of the ON Semiconductor datasheet and supports its use in bidirectional clamping or polarity-checking applications.

What is the thermal derating slope for 1N5241B_S00Z above 50°C?

The 1N5241B_S00Z derates linearly at 4.0 mW/°C above 50°C ambient temperature, reducing its maximum allowable power dissipation from 500 mW at 25°C to zero at approximately 175°C case temperature. This slope is defined in the Absolute Maximum Ratings table and applies to free-air conditions.

Is the cathode of 1N5241B_S00Z marked with a band?

Yes, the cathode of the 1N5241B_S00Z is identified by a distinct color band on the DO-35 glass body, consistent with JEDEC DO-204AH standards. This marking is shown in the mechanical drawing on page 4 of the ON Semiconductor datasheet and is critical for correct orientation in shunt regulator circuits.

What is the maximum reverse leakage current for 1N5241B_S00Z?

The maximum reverse leakage current for 1N5241B_S00Z is 2.0 μA at 8.4 V reverse voltage (76% of nominal V_Z), as specified in the Electrical Characteristics table. This value is measured at 25°C and confirms suitability for ultra-low-power applications such as battery-backed monitoring circuits.

1N5241B_S00Z Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: DO-204AH, DO-35, Axial

Packaging:: Bulk

Product Status:: Obsolete

Voltage - Zener (Nom) (Vz):: 11 V

Tolerance:: ±5%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 22 Ohms

Current - Reverse Leakage @ Vr:: 2 µA @ 8.4 V

Voltage - Forward (Vf) (Max) @ If:: 1.2 V @ 200 mA

Operating Temperature:: -65°C ~ 200°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-35

1N5241B_S00Z FAQ

1.How can I place an order for 1N5241B_S00Z through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N5241B_S00Z on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for 1N5241B_S00Z reliable?

The price and inventory of 1N5241B_S00Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5241B_S00Z is usually 5 days.

3.What payment methods are accepted for 1N5241B_S00Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5241B_S00Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N5241B_S00Z?

1N5241B_S00Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N5241B_S00Z order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for 1N5241B_S00Z?

For technical support, including 1N5241B_S00Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5241B_S00Z requirements.

6.How does Aetrix verify that 1N5241B_S00Z is sourced from the original manufacturer or authorized distributors?

All 1N5241B_S00Z products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 1N5241B_S00Z meets industry standards.

7.What is the process for return or replacement of 1N5241B_S00Z?

All 1N5241B_S00Z units undergo pre-shipment inspection (PSI). If there is an issue with 1N5241B_S00Z, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The 1N5241B_S00Z part is unused and in its original packaging.

Return procedure for 1N5241B_S00Z:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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