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

onsemi 1N5232B_T50R

Name: 1N5232B_T50R
Brand: onsemi
SKU: 1N5232B_T50R
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N5232B_T50R

Manufacturer:: onsemi

Category:: Single Zener Diodes

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

Datasheet:: 1N5232B_T50R.pdf

Description:: DIODE ZENER 5.6V 500MW DO35

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Product details

Overview

1N5232B_T50R from ON Semiconductor is a 5.6 V ±5% Zener diode in DO-35 glass package, rated for 500 mW power dissipation, 11 Ω dynamic impedance at 20 mA, and 5.0 μA maximum reverse leakage at 4.2 V. It provides precision voltage regulation in low-power analog reference and overvoltage protection circuits.

For engineers reviewing the 1N5232B_T50R datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance, thermal coefficient (+0.038 %/°C), junction temperature range (−65 °C to +200 °C), and DO-35 mechanical compatibility with through-hole PCB layouts.

Technical Context

This device operates as a silicon planar Zener diode optimized for stable voltage reference generation in linear power supplies, sensor biasing, and signal conditioning. Its 5.6 V nominal breakdown voltage falls within the low-noise "knee" region of the Zener curve, where temperature coefficient crosses zero near room temperature.

The DO-35 hermetically sealed glass package ensures long-term stability under thermal cycling and humidity exposure. Thermal derating begins above 50 °C at 4.0 mW/°C, supporting reliable operation in industrial ambient environments up to +125 °C case temperature when power is reduced accordingly.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	5.32 V min / 5.6 V typ / 5.88 V max @ I_Z = 20 mA - defines tight 5% tolerance band for accurate reference design
Dynamic Impedance (Z_Z)	11 Ω max @ I_Z = 20 mA - ensures minimal output voltage variation under load current changes
Reverse Leakage (I_R)	5.0 μA max @ V_R = 4.2 V - guarantees low quiescent current in standby regulation paths
Power Dissipation (P_D)	500 mW @ T_A = 25 °C - sets maximum continuous DC power handling in free-air conditions
Temperature Coefficient (TC)	+0.038 %/°C - indicates near-zero drift around 25 °C, critical for precision analog references
Junction Temperature Range	−65 °C to +200 °C - enables deployment in automotive under-hood, aerospace, and high-reliability industrial systems

Pinout & Package

DO-35 glass axial package: hermetically sealed, 2.0 mm diameter body, 5.33 mm overall length, cathode indicated by color band. Lead spacing 25.4 mm minimum (T50), lead diameter 0.46 mm, weight 0.137 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal / Zener cathode bias reference	Connected to lower-potential node in reverse-bias regulation configuration; determines polarity of voltage clamp
Cathode	Zener breakdown terminal / regulated output node	Connected to higher-potential rail; delivers stable 5.6 V reference when reverse biased above V_Z

Key Features

Feature	Design Value
±5% Zener voltage tolerance	Enables use without post-production trimming in cost-sensitive consumer and industrial power rails
Low 11 Ω dynamic impedance	Maintains <10 mV output deviation across ±5 mA load current swings in feedback references
+0.038 %/°C tempco	Minimizes reference drift to <±1.5 mV over 0–70 °C ambient, suitable for uncalibrated instrumentation
DO-35 hermetic glass package	Provides >10-year parametric stability in humid or chemically aggressive environments
500 mW power rating	Supports direct regulation of microcontroller reset circuits and op-amp bias networks without external pass devices

Applications

Voltage Reference for ADC Biasing	Microcontroller Reset Circuit
Use Scenario: Providing stable 5.6 V reference to 12-bit SAR ADC input buffer in battery-powered data loggers. IC Role / Device Role / Timing Role: Zener diode acts as shunt voltage reference, establishing precise input common-mode level independent of supply rail fluctuations. Use Value: Enables consistent full-scale accuracy across −20 °C to +60 °C without calibration, leveraging near-zero tempco at 5.6 V.	Use Scenario: Generating clean, noise-immune reset signal for ARM Cortex-M0+ MCU during cold start and brown-out events. IC Role / Device Role / Timing Role: Functions as threshold detector in RC-based reset generator, clamping capacitor voltage at 5.6 V to define reset release point. Use Value: Guarantees deterministic reset timing with <±2% voltage hysteresis, eliminating spurious resets in noisy 12 V automotive subsystems.
Overvoltage Clamp in Sensor Interface	Current-Limited Bias Supply for Op-Amps
Use Scenario: Protecting 3.3 V rail-connected analog front-end from transient surges on 5 V sensor excitation lines. IC Role / Device Role / Timing Role: Shunt limiter that conducts excess current above 5.6 V, diverting energy away from downstream ESD-sensitive ICs. Use Value: Limits clamped voltage to ≤5.9 V under 100 mA surge (with series resistor), preventing latch-up in precision amplifiers.	Use Scenario: Delivering regulated 5.6 V bias to dual-rail op-amps in portable audio preamplifier stages. IC Role / Device Role / Timing Role: Passive regulator supplying fixed current-limited bias, eliminating need for LDO in ultra-low-quiescent designs. Use Value: Reduces BOM count by replacing discrete regulator IC while maintaining <0.5% output ripple under 1 mA load.

Voltage Reference for ADC Biasing

Microcontroller Reset Circuit

Use Scenario: Providing stable 5.6 V reference to 12-bit SAR ADC input buffer in battery-powered data loggers.

IC Role / Device Role / Timing Role: Zener diode acts as shunt voltage reference, establishing precise input common-mode level independent of supply rail fluctuations.

Use Value: Enables consistent full-scale accuracy across −20 °C to +60 °C without calibration, leveraging near-zero tempco at 5.6 V.

Use Scenario: Generating clean, noise-immune reset signal for ARM Cortex-M0+ MCU during cold start and brown-out events.

IC Role / Device Role / Timing Role: Functions as threshold detector in RC-based reset generator, clamping capacitor voltage at 5.6 V to define reset release point.

Use Value: Guarantees deterministic reset timing with <±2% voltage hysteresis, eliminating spurious resets in noisy 12 V automotive subsystems.

Overvoltage Clamp in Sensor Interface

Current-Limited Bias Supply for Op-Amps

Use Scenario: Protecting 3.3 V rail-connected analog front-end from transient surges on 5 V sensor excitation lines.

IC Role / Device Role / Timing Role: Shunt limiter that conducts excess current above 5.6 V, diverting energy away from downstream ESD-sensitive ICs.

Use Value: Limits clamped voltage to ≤5.9 V under 100 mA surge (with series resistor), preventing latch-up in precision amplifiers.

Use Scenario: Delivering regulated 5.6 V bias to dual-rail op-amps in portable audio preamplifier stages.

IC Role / Device Role / Timing Role: Passive regulator supplying fixed current-limited bias, eliminating need for LDO in ultra-low-quiescent designs.

Use Value: Reduces BOM count by replacing discrete regulator IC while maintaining <0.5% output ripple under 1 mA load.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N4734A	Same 5.6 V nominal, but ±5% tolerance and 5 Ω Z_Z; DO-41 package (larger, higher thermal mass)	Better thermal stability in high-pulse-load scenarios; requires larger PCB footprint	Select when higher surge current capability (>1 A) and long-term drift <100 ppm/1000 h are required
BZX55-C5V6	5.6 V ±5%, 10 Ω Z_Z, DO-35 package, but 625 mW rating and −0.05 %/°C tempco	Slightly tighter tempco but higher power rating increases self-heating error in precision references	Prefer for general-purpose clamping where absolute accuracy is secondary to robustness

Compared with 1N5232B_T50R, the 1N4734A offers superior pulse handling in larger DO-41 form factor, while BZX55-C5V6 trades marginally better tempco for higher self-heating risk-making 1N5232B_T50R optimal for space-constrained, low-drift analog references.

Availability

1N5232B_T50R is available at Aetrix Electronics and suitable for voltage reference design, overvoltage protection, and microcontroller reset circuitry requiring stable component supply across automotive, industrial control, and medical instrumentation programs.

Supply support for 1N5232B_T50R 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 power management, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and medical markets.

The 1N52xxB series belongs to ON Semiconductor's legacy Zener diode product line, engineered for high-stability, low-cost voltage regulation in space- and cost-constrained applications where precision and reliability are essential.

FAQ

What is the exact Zener voltage range for 1N5232B_T50R at 20 mA test current?

The 1N5232B_T50R has a guaranteed Zener voltage range of 5.32 V (minimum) to 5.88 V (maximum) when tested at I_Z = 20 mA and T_A = 25 °C. This 5.6 V nominal rating with ±5% tolerance ensures predictable clamping behavior in production-grade voltage reference designs without binning or trimming.

Does 1N5232B_T50R support operation above 100 °C ambient temperature?

Yes, the 1N5232B_T50R supports junction temperatures up to +200 °C and storage temperatures from −65 °C to +200 °C. At ambient temperatures above 50 °C, power must be derated linearly at 4.0 mW/°C; for example, at 100 °C ambient, maximum allowable power drops to 300 mW to maintain safe junction temperature.

Is the DO-35 package of 1N5232B_T50R compatible with standard through-hole reflow profiles?

Yes, the DO-35 glass package of 1N5232B_T50R is qualified for standard SnPb and lead-free wave soldering, with maximum lead temperature of +230 °C for 10 seconds at 1/16 inch from case. Its hermetic seal prevents moisture-induced popcorning, making it suitable for both selective and full-board reflow processes used in industrial PCB assembly.

What is the reverse leakage current specification for 1N5232B_T50R at 4.2 V?

The 1N5232B_T50R specifies a maximum reverse leakage current (I_R) of 5.0 μA when reverse biased at V_R = 4.2 V and measured at T_A = 25 °C. This low leakage ensures minimal current draw in always-on reference circuits and preserves battery life in portable equipment using the 1N5232B_T50R for biasing.

How does the temperature coefficient of 1N5232B_T50R affect its performance in precision references?

The 1N5232B_T50R exhibits a temperature coefficient of +0.038 %/°C, meaning its Zener voltage increases by approximately 2.1 mV per °C rise near 25 °C. This near-zero drift characteristic makes it ideal for uncalibrated analog references where stability over 0–70 °C is required without active compensation circuitry.

1N5232B_T50R Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Voltage - Zener (Nom) (Vz):: 5.6 V

Tolerance:: ±5%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 11 Ohms

Current - Reverse Leakage @ Vr:: 5 µA @ 3 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

1N5232B_T50R FAQ

1.How can I place an order for 1N5232B_T50R through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N5232B_T50R 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 1N5232B_T50R reliable?

The price and inventory of 1N5232B_T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5232B_T50R is usually 5 days.

3.What payment methods are accepted for 1N5232B_T50R?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5232B_T50R transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N5232B_T50R?

1N5232B_T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N5232B_T50R 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 1N5232B_T50R?

For technical support, including 1N5232B_T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5232B_T50R requirements.

6.How does Aetrix verify that 1N5232B_T50R is sourced from the original manufacturer or authorized distributors?

All 1N5232B_T50R 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 1N5232B_T50R meets industry standards.

7.What is the process for return or replacement of 1N5232B_T50R?

All 1N5232B_T50R units undergo pre-shipment inspection (PSI). If there is an issue with 1N5232B_T50R, 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 1N5232B_T50R part is unused and in its original packaging.

Return procedure for 1N5232B_T50R:

1.Submit a request within 90 days.

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

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