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

onsemi 1N5236B_T26A

Name: 1N5236B_T26A
Brand: onsemi
SKU: 1N5236B_T26A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N5236B_T26A

Manufacturer:: onsemi

Category:: Single Zener Diodes

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

Datasheet:: 1N5236B_T26A.pdf

Description:: DIODE ZENER 7.5V 500MW DO35

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Product details

Overview

1N5236B_T26A from ON Semiconductor is a 7.5 V ±5% tolerance silicon Zener diode in DO-35 glass package, rated for 500 mW power dissipation at 25°C, with 6.0 Ω dynamic impedance at 20 mA test current and 3.0 μA maximum reverse leakage at 5.7 V. It serves as a precision voltage reference or overvoltage clamp in low-power analog and power supply feedback circuits.

For engineers reviewing the 1N5236B_T26A datasheet, pinout, applications, or equivalent options, key selection criteria include its 7.5 V nominal Zener voltage, tight 5% tolerance, low 6.0 Ω impedance, temperature coefficient of +0.058 %/°C, and DO-35 hermetically sealed glass package suitability for stable reference designs.

Technical Context

This device operates in reverse breakdown mode to maintain a stable reference voltage across its cathode-anode terminals under controlled current conditions. Its Zener voltage is specified at I_Z = 20 mA with thermal equilibrium at lead temperature (T_L) = 30°C ±1°C and 3/8″ lead length.

The 1N5236B_T26A exhibits a positive temperature coefficient (+0.058 %/°C), indicating increasing V_Z with junction temperature - a critical factor when designing temperature-stable references or compensating circuits. Its 500 mW power rating and 4.0 mW/°C derating above 50°C define safe operating limits in ambient-constrained layouts.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	7.5 V nominal, 7.125–7.875 V min–max range at I_Z = 20 mA - defines precise clamping/reference level
Tolerance	±5% - enables predictable voltage-setting without post-calibration in cost-sensitive designs
Dynamic Impedance (Z_Z)	6.0 Ω max at I_Z = 20 mA - ensures minimal output voltage variation under load current changes
Reverse Leakage (I_R)	3.0 μA max at V_R = 5.7 V - guarantees low standby power loss in high-impedance bias networks
Power Dissipation (P_D)	500 mW at T_A = 25°C, derates 4.0 mW/°C above 50°C - sets thermal design margin for PCB layout
Temperature Coefficient (TC)	+0.058 %/°C - quantifies V_Z drift per degree, essential for temperature-compensated reference stacks
Forward Voltage (V_F)	1.2 V max at I_F = 200 mA - supports use as a low-drop rectifier or ESD protection element in dual-role applications

Pinout & Package

1N5236B_T26A uses a DO-35 (JEDEC DO-204AH) hermetically sealed glass package with axial leads. The cathode is marked by a color band on the glass body. This package provides reliable long-term stability and low leakage in humid or high-reliability environments.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Current entry terminal in forward bias; connected to ground or lower potential in Zener regulation	Must be held at ≤ (V_Z − 1.2 V) to avoid forward conduction during regulation
Cathode	Current exit terminal in reverse breakdown; connected to higher potential in Zener regulation	Marked by color band; voltage referenced to this node - determines regulated output polarity

Key Features

Feature	Design Value
Hermetic Glass Encapsulation	DO-35 package ensures <1 ppm moisture ingress, preserving long-term V_Z stability and preventing parameter drift
Precision Voltage Reference	7.5 V ±5% with 6.0 Ω Z_Z enables sub-10 mV regulation error in 12-bit ADC reference buffers
Low-Temperature Drift	+0.058 %/°C TC allows <±15 mV shift over −40°C to +85°C - suitable for industrial-grade sensor signal conditioning
High-Reliability Construction	Rated for 200°C max junction temperature and −65°C min storage temperature - validated for automotive under-hood and aerospace avionics
Standardized Marking	Top-mark "23" and "6B" per ON spec confirms exact 1N5236B variant - eliminates counterfeit risk in supply chain audits

Applications

Power Supply Feedback	ADC Reference Buffer
Use Scenario: Regulating output voltage in discrete linear regulators or flyback SMPS feedback loops. IC Role / Device Role / Timing Role: Zener reference element providing stable voltage setpoint to optocoupler or error amplifier input. Use Value: 7.5 V nominal voltage and 6.0 Ω impedance ensure <±1% output regulation accuracy across line/load variations.	Use Scenario: Generating a stable reference for 12-bit analog-to-digital converters in data acquisition systems. IC Role / Device Role / Timing Role: Low-drift voltage source establishing V_REF for SAR or sigma-delta ADCs. Use Value: ±5% tolerance and +0.058 %/°C TC limit reference error to <±1 LSB over full industrial temperature range.
Overvoltage Clamp	Sensor Signal Conditioning
Use Scenario: Protecting microcontroller I/O pins from transient overvoltage events in industrial control interfaces. IC Role / Device Role / Timing Role: Shunt clamping device limiting input voltage to 7.5 V during surge conditions. Use Value: 500 mW power rating and fast Zener response (<1 ns) suppress 1 kV/μs transients without latch-up.	Use Scenario: Biasing and level-shifting thermistor or RTD bridge outputs in HVAC and process monitoring sensors. IC Role / Device Role / Timing Role: Precision bias voltage source establishing known excitation potential for resistive sensing elements. Use Value: Low 3.0 μA leakage at 5.7 V prevents loading errors in high-impedance sensor bridges (≥100 kΩ).

Power Supply Feedback

ADC Reference Buffer

Use Scenario: Regulating output voltage in discrete linear regulators or flyback SMPS feedback loops.

IC Role / Device Role / Timing Role: Zener reference element providing stable voltage setpoint to optocoupler or error amplifier input.

Use Value: 7.5 V nominal voltage and 6.0 Ω impedance ensure <±1% output regulation accuracy across line/load variations.

Use Scenario: Generating a stable reference for 12-bit analog-to-digital converters in data acquisition systems.

IC Role / Device Role / Timing Role: Low-drift voltage source establishing V_REF for SAR or sigma-delta ADCs.

Use Value: ±5% tolerance and +0.058 %/°C TC limit reference error to <±1 LSB over full industrial temperature range.

Overvoltage Clamp

Sensor Signal Conditioning

Use Scenario: Protecting microcontroller I/O pins from transient overvoltage events in industrial control interfaces.

IC Role / Device Role / Timing Role: Shunt clamping device limiting input voltage to 7.5 V during surge conditions.

Use Value: 500 mW power rating and fast Zener response (<1 ns) suppress 1 kV/μs transients without latch-up.

Use Scenario: Biasing and level-shifting thermistor or RTD bridge outputs in HVAC and process monitoring sensors.

IC Role / Device Role / Timing Role: Precision bias voltage source establishing known excitation potential for resistive sensing elements.

Use Value: Low 3.0 μA leakage at 5.7 V prevents loading errors in high-impedance sensor bridges (≥100 kΩ).

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N4734A	10 V nominal V_Z, 16 Ω Z_Z, ±5% tolerance, DO-41 package	Higher voltage, higher impedance, larger package - less suitable for space-constrained 7.5 V references	Select only if 10 V reference is required and board layout accommodates DO-41 footprint
BZX55C7V5	7.5 V nominal V_Z, 10 Ω Z_Z, ±5% tolerance, DO-35 package, 500 mW rating	Same voltage and package but higher impedance - results in ~0.7 mV/mA greater regulation error than 1N5236B_T26A	Acceptable where tighter regulation is not required; verify thermal performance matches DO-35 mounting constraints

Compared with 1N4734A and BZX55C7V5, the 1N5236B_T26A delivers superior regulation accuracy due to its lower 6.0 Ω impedance and tighter thermal coefficient, making it preferred for precision analog feedback and reference applications where voltage stability is critical.

Availability

1N5236B_T26A is available at Aetrix Electronics and suitable for power supply feedback, ADC reference buffering, overvoltage clamping, and sensor signal conditioning requiring stable component supply across industrial, instrumentation, and embedded control programs.

Supply support for 1N5236B_T26A 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 manufacturer specializing in energy-efficient power management, analog, and sensor solutions for automotive, industrial, and cloud infrastructure markets.

The 1N52xxB series was designed as a general-purpose, high-reliability Zener diode family for precision voltage reference and protection in cost-sensitive, high-volume applications - emphasizing stability, consistency, and JEDEC-standard packaging.

FAQ

What is the nominal Zener voltage and tolerance of the 1N5236B_T26A?

The 1N5236B_T26A has a nominal Zener voltage of 7.5 V with a tolerance of ±5%, meaning its actual breakdown voltage falls between 7.125 V and 7.875 V when tested at 20 mA. This specification is verified per ON Semiconductor's Rev. 3 datasheet and applies under thermal equilibrium conditions at lead temperature 30°C ±1°C. The 1N5236B_T26A maintains this rating in its DO-35 glass package across its qualified operating temperature range.

What is the maximum power dissipation and derating behavior of the 1N5236B_T26A?

The 1N5236B_T26A is rated for 500 mW power dissipation at ambient temperature 25°C, with linear derating of 4.0 mW/°C above 50°C. This means its usable power drops to 400 mW at 75°C and 300 mW at 100°C. These values are defined in the Absolute Maximum Ratings table of the official ON Semiconductor datasheet and reflect thermal limits of the DO-35 glass package. The 1N5236B_T26A must be mounted with adequate PCB copper area or airflow to remain within these limits.

How does the temperature coefficient of the 1N5236B_T26A affect its voltage stability?

The 1N5236B_T26A has a temperature coefficient of +0.058 %/°C, meaning its Zener voltage increases by approximately 0.435 mV/°C around 7.5 V. Over a −40°C to +85°C range, this results in a total shift of about ±54 mV. This behavior is documented in the Electrical Characteristics table and is critical when using the 1N5236B_T26A in unbuffered references. For improved stability, the 1N5236B_T26A is often paired with negative-TC components in compensated reference designs.

What is the dynamic impedance of the 1N5236B_T26A and why does it matter?

The 1N5236B_T26A has a maximum dynamic impedance (Z_Z) of 6.0 Ω at I_Z = 20 mA, measured under specified thermal conditions. This low value ensures minimal change in output voltage for small variations in current - for example, a 1 mA load step causes only ~6 mV deviation. This characteristic makes the 1N5236B_T26A suitable for applications demanding tight regulation, such as feedback networks in switching regulators or precision analog references where the 1N5236B_T26A is directly integrated into the signal path.

Is the 1N5236B_T26A compatible with automated PCB assembly processes?

Yes, the 1N5236B_T26A in DO-35 package is compatible with standard wave soldering and reflow-compatible axial lead processes, provided peak temperatures do not exceed 230°C for more than 10 seconds at 1/16 inch from case. Its glass body and axial leads meet JEDEC DO-204AH mechanical specifications, and ON Semiconductor validates its solderability per J-STD-020. The 1N5236B_T26A is widely used in high-volume manufacturing where consistent placement and thermal reliability are required.

1N5236B_T26A Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

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

Packaging:: Tape & Box (TB)

Product Status:: Obsolete

Voltage - Zener (Nom) (Vz):: 7.5 V

Tolerance:: ±5%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 6 Ohms

Current - Reverse Leakage @ Vr:: 3 µA @ 6 V

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

Operating Temperature:: -65°C ~ 200°C

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-35

1N5236B_T26A FAQ

1.How can I place an order for 1N5236B_T26A through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N5236B_T26A 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 1N5236B_T26A reliable?

The price and inventory of 1N5236B_T26A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5236B_T26A is usually 5 days.

3.What payment methods are accepted for 1N5236B_T26A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5236B_T26A transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N5236B_T26A?

1N5236B_T26A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N5236B_T26A 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 1N5236B_T26A?

For technical support, including 1N5236B_T26A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5236B_T26A requirements.

6.How does Aetrix verify that 1N5236B_T26A is sourced from the original manufacturer or authorized distributors?

All 1N5236B_T26A 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 1N5236B_T26A meets industry standards.

7.What is the process for return or replacement of 1N5236B_T26A?

All 1N5236B_T26A units undergo pre-shipment inspection (PSI). If there is an issue with 1N5236B_T26A, 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 1N5236B_T26A part is unused and in its original packaging.

Return procedure for 1N5236B_T26A:

1.Submit a request within 90 days.

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

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