Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Diodes Incorporated 1N5260B-T

Name: 1N5260B-T
Brand: Diodes Incorporated
SKU: 1N5260B-T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: 1N5260B-T

Manufacturer:: Diodes Incorporated

Category:: Single Zener Diodes

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

Datasheet:: 1N5260B-T.pdf

Description:: DIODE ZENER 43V 500MW DO35

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:2,060

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

1N5260B-T from Diodes Incorporated is a 43V ±5% tolerance, 500mW glass-encapsulated Zener diode in DO-35 package, designed for precision voltage regulation and reference applications in low-power analog circuits, power supply feedback loops, and overvoltage protection. It delivers 93Ω zener impedance at 3.0mA test current, exhibits +0.095%/°C temperature coefficient, and operates across –65°C to +175°C.

For engineers reviewing the 1N5260B-T datasheet, 1N5260B-T pinout, 1N5260B-T application, or 1N5260B-T equivalent, key selection considerations include its 43V nominal zener voltage, ±5% tolerance, 500mW power rating, DO-35 hermetic glass package, and thermal resistance of 300°C/W - critical for stable biasing and voltage clamping in space-constrained industrial and automotive subsystems.

Technical Context

This Zener diode operates in reverse breakdown mode with tightly controlled V_Z = 43V (min 40.85V, max 45.15V) at I_ZT = 3.0mA. Its +0.095%/°C temperature coefficient ensures predictable drift under thermal variation, while low 93Ω dynamic impedance at test current supports stable regulation under small-signal load changes.

The DO-35 glass package provides hermetic sealing and polarity identification via cathode band. With 0.13g mass and J-STD-020 Level 1 moisture sensitivity, it supports standard reflow and hand-soldering processes without preconditioning, and its Sn96.5Ag3.5 lead finish meets RoHS 3 compliance per EU Directive 2015/863/EU.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	43V nominal, 40.85–45.15V range at 3.0mA - defines precise clamping/reference level in feedback or protection circuits
Power Dissipation (P_D)	500mW - sets maximum continuous reverse power handling before thermal runaway
Zener Impedance (Z_ZT)	93Ω at 3.0mA - determines regulation stiffness and AC ripple rejection capability
Temperature Coefficient	+0.095%/°C - quantifies V_Z drift per degree Celsius, critical for wide-temperature designs
Reverse Current (I_R)	0.1µA at rated V_R - ensures minimal leakage in high-impedance bias networks
Thermal Resistance (R_θJA)	300°C/W - defines junction-to-ambient temperature rise per watt, guiding heatsinking decisions
Operating Temperature	–65°C to +175°C - enables use in under-hood automotive, industrial control, and aerospace environments

Pinout & Package

Package: DO-35 glass axial package with cathode band marking; hermetic, lead-free (Sn96.5Ag3.5), 0.13g mass, moisture sensitivity Level 1.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal / Reverse breakdown reference node	Connected to lower-potential side in Zener regulation; forms reference ground return path
Cathode	Reverse breakdown terminal / Voltage clamp output	Connected to regulated node; cathode band identifies this terminal for correct orientation in PCB layout

Key Features

Feature	Design Value
±5% Zener voltage tolerance	Enables tight voltage reference accuracy without post-production trimming in cost-sensitive designs
Hermetic glass DO-35 package	Provides long-term reliability and parameter stability in humid or corrosive environments
RoHS 3 compliant lead finish	Meets EU Directive 2015/863/EU with Sn96.5Ag3.5 alloy, supporting lead-free assembly without solderability compromise
Low 0.1µA reverse leakage	Minimizes error in high-impedance voltage divider or sensor bias networks
High operating temperature range	Supports deployment in engine control units, power converters, and industrial motor drives without derating

Applications

Power Supply Feedback

Voltage Reference

Use Scenario: Used in TL431-based shunt regulator feedback network to set output voltage in isolated DC-DC converters.

IC Role / Device Role / Timing Role: Zener diode provides stable 43V reference to comparator input, enabling accurate output voltage sensing.

Use Value: Tight ±5% tolerance and low 93Ω impedance ensure <±1% output regulation accuracy across line/load/temperature.

Use Scenario: Serves as primary voltage reference in analog front-end circuitry for industrial temperature transmitters.

IC Role / Device Role / Timing Role: Provides fixed 43V reference for ADC biasing and signal conditioning amplifier offset calibration.

Use Value: +0.095%/°C tempco and –65°C to +175°C operation maintain reference stability in uncontrolled ambient conditions.

Overvoltage Clamp

ESD Protection Interface

Use Scenario: Placed across microcontroller I/O rail to limit transient spikes during relay switching in PLC modules.

IC Role / Device Role / Timing Role: Acts as passive crowbar device, conducting above 45.15V to divert surge energy to ground.

Use Value: 500mW power rating and 300°C/W thermal resistance allow safe dissipation of 100ns–1µs transients up to 1.5A peak.

Use Scenario: Integrated into RS-485 transceiver ESD protection network on fieldbus interface cards.

IC Role / Device Role / Timing Role: Functions as secondary clamp alongside TVS diode, absorbing residual energy after primary ESD event.

Use Value: Low 0.1µA leakage preserves bus idle-state voltage integrity; glass package ensures no parametric shift after repeated ESD strikes.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMSZ5260B	Surface-mount SOD-123 package; same 43V V_Z, ±5%, but lower P_D = 350mW and higher Z_ZT = 110Ω	Designed for automated pick-and-place assembly; unsuitable for through-hole legacy boards or >350mW continuous dissipation	Select when board space is constrained and thermal management permits lower power rating
1N4751A	DO-41 package; 30V V_Z, ±5%, 1W P_D, Z_ZT = 35Ω at 41mA - different voltage grade and higher power	Used where higher power handling and lower impedance are required, but 30V reference is acceptable	Choose only if system requires 30V regulation and can accommodate larger DO-41 footprint and higher test current

Compared with MMSZ5260B and 1N4751A, the 1N5260B-T offers unique value in legacy through-hole designs needing 43V precision regulation with 500mW capability and hermetic reliability - bridging performance between SMT miniaturization and high-power axial alternatives.

Availability

1N5260B-T is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and instrumentation systems requiring stable component supply despite its obsolete status - supported via verified legacy stock and cross-reference engineering assistance.

Supply support for 1N5260B-T 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

The 1N52xxB series belongs to Diodes' legacy Zener diode product line, engineered specifically for general-purpose voltage regulation and reference applications where hermetic reliability, tight tolerance, and wide temperature operation are essential.

FAQ

Is the 1N5260B-T still in active production?

No - Diodes Incorporated has discontinued the 1N5260B-T. It is marked "OBSOLETE – PART DISCONTINUED" in the official datasheet (DS18006 Rev. 19-4). However, Aetrix Electronics maintains verified legacy inventory and supports design continuity through cross-reference guidance to MMSZ5260B or other functionally aligned Zeners.

What is the maximum reverse voltage (V_R) before significant leakage occurs?

At V_R = 33V (77% of nominal V_Z), reverse current is guaranteed ≤0.1µA. This value is specified in the Electrical Characteristics table under "Maximum Reverse Current IR @ VR" - confirming usable clamping headroom below 43V while maintaining ultra-low leakage.

Can the 1N5260B-T be used in surface-mount designs?

No - the 1N5260B-T uses a DO-35 axial glass package intended for through-hole mounting. For surface-mount equivalents, Diodes recommends the MMSZ5260B in SOD-123 package, which shares identical 43V zener voltage and ±5% tolerance but differs in power rating (350mW) and impedance (110Ω).

How does the +0.095%/°C temperature coefficient impact circuit accuracy?

Over a 100°C range (e.g., –25°C to +75°C), V_Z shifts by approximately ±9.5mV per volt - resulting in ~±4.1V total drift for the 43V device. This must be factored into reference-critical applications; compensation techniques (e.g., matched diode pairs) may be needed where sub-1% absolute accuracy is required across temperature.

1N5260B-T Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Voltage - Zener (Nom) (Vz):: 43 V

Tolerance:: ±5%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 93 Ohms

Current - Reverse Leakage @ Vr:: 100 nA @ 33 V

Voltage - Forward (Vf) (Max) @ If:: 1.1 V @ 200 mA

Operating Temperature:: -65°C ~ 200°C

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-35

1N5260B-T FAQ

1.How can I place an order for 1N5260B-T through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N5260B-T 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 1N5260B-T reliable?

The price and inventory of 1N5260B-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5260B-T is usually 5 days.

3.What payment methods are accepted for 1N5260B-T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5260B-T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N5260B-T?

1N5260B-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N5260B-T 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 1N5260B-T?

For technical support, including 1N5260B-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5260B-T requirements.

6.How does Aetrix verify that 1N5260B-T is sourced from the original manufacturer or authorized distributors?

All 1N5260B-T 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 1N5260B-T meets industry standards.

7.What is the process for return or replacement of 1N5260B-T?

All 1N5260B-T units undergo pre-shipment inspection (PSI). If there is an issue with 1N5260B-T, 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 1N5260B-T part is unused and in its original packaging.

Return procedure for 1N5260B-T:

1.Submit a request within 90 days.

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

Tech Hub

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…

2026-08-11 LDO Regulator: Dropout Voltage, Noise, PSRR and Power Dissipation

LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…

2026-08-06 Conditional Access Module: CAM, CI/CI+ and DVB Security

Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…

2026-08-03 Electronic Component Obsolescence: EOL Risks, Replacement Options and Last-Time Buy Strategy

Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.

2026-07-29 18650 Battery: Voltage, Capacity, Charging and Pack Design

18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…

2026-07-27 Hall Effect Sensor: Working Principle, Types, Circuits and Applications

Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…

2026-07-20 Product Change Notification (PCN) in Electronic Components: Meaning and Supply Chain Response

Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…

2026-07-19 Blend Door Actuator: Symptoms, Location, Reset and Replacement Guide

A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…