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

onsemi 1N4682

Name: 1N4682
Brand: onsemi
SKU: 1N4682
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: 1N4682

Manufacturer:: onsemi

Category:: Single Zener Diodes

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

Datasheet:: 1N4682.pdf

Description:: DIODE ZENER 2.7V 500MW DO204AH

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:6,691

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

Product details

Overview

1N4682 from ON Semiconductor is a 500 mW, DO-35 hermetically sealed glass Zener diode with nominal zener voltage of 2.7 V (±5%), maximum zener current of 90 mA, and reverse leakage current ≤1 µA at 2.16 V. It serves as a precision low-voltage reference or shunt regulator in battery-powered sensor interfaces and low-power analog signal conditioning circuits.

For engineers reviewing the 1N4682 datasheet, pinout, applications, or equivalent options, key selection considerations include its 2.7 V zener tolerance, ultra-low leakage at sub-3 V operation, DO-35 package thermal derating profile, and suitability for low-current (<1 mA) regulation where temperature coefficient stability below 3 V is critical.

Technical Context

The 1N4682 employs oxide-passivated silicon junction technology to achieve sharp breakdown characteristics and stable low-voltage regulation. Its double-slug, metallurgically bonded construction ensures mechanical robustness and hermetic sealing against moisture and contaminants.

Designed for operation at lead temperature ≤75°C, it exhibits a thermal resistance (θ_JL) of ~30–40°C/W depending on mounting method and requires derating to 4.0 mW/°C above 75°C. Its zener voltage temperature coefficient is negative below 3 V, typical of low-voltage Zeners, and must be accounted for in precision reference designs.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	2.565–2.835 V @ I_ZT = 1 mA - Tight ±5% tolerance enables stable low-voltage reference without trimming.
Power Dissipation (P_D)	500 mW @ T_L ≤ 75°C - Supports continuous regulation in compact axial-leaded layouts with adequate heat sinking.
Reverse Leakage (I_R)	≤1 µA @ V_R = 2.16 V - Enables microamp-level standby regulation in battery-critical applications.
Zener Impedance (Z_Z)	~90 Ω @ I_Z = 1 mA - Low dynamic impedance improves regulation under light-load transients.
ESD Rating	Class 3 (>16 kV HBM) - Robust handling during assembly and field operation without external protection.
Operating Temp Range	–65°C to +200°C - Validated for extended-range industrial and aerospace environments.

Pinout & Package

Package: DO-35 (JEDEC DO-204AH), axial-lead, hermetically sealed glass case with cathode band marking. Leads are solderable per 230°C for 10 seconds at 1/16″ from case.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal / Zener cathode reference ground node	Connected to circuit ground or lower-potential rail; forms reference node when cathode is biased above anode.
Cathode	Zener breakdown terminal / Input voltage node	Marked by band; connected to unregulated supply; clamps voltage to V_Z relative to anode.

Key Features

Feature	Design Value
Oxide-passivated junction	Enables sharp, repeatable breakdown at 2.7 V with minimal knee hysteresis for stable low-current regulation.
Hermetic glass seal	Prevents parameter drift due to humidity ingress-critical for long-term calibration stability in sealed instruments.
Double-slug construction	Improves thermal coupling between junction and leads, supporting higher pulsed power without thermal runaway.
Low-voltage temperature coefficient	Negative TC below 3 V (per Fig. 4a) allows predictable drift compensation in reference ladder networks.

Applications

Portable Sensor Reference	Low-Power Microcontroller Reset
Use Scenario: Providing stable 2.7 V reference for ADCs in coin-cell–powered environmental sensors. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise input scaling for analog front-end amplifiers. Use Value: Ultra-low 1 µA leakage preserves battery life over multi-year deployments while maintaining ±0.1% reference accuracy.	Use Scenario: Generating reset threshold for 3 V–rated MCUs in energy-harvesting nodes. IC Role / Device Role / Timing Role: Zener-clamped voltage monitor triggering POR circuitry during brown-out events. Use Value: Tight ±5% V_Z tolerance ensures deterministic reset activation at 2.57–2.84 V, eliminating false triggers.
Industrial Current Loop Bias	Calibration Standard in Test Equipment
Use Scenario: Setting bias point for 4–20 mA transmitter output stages operating from 12 V rails. IC Role / Device Role / Timing Role: Precision shunt regulator stabilizing op-amp reference voltage in loop-powered transmitters. Use Value: 500 mW rating supports continuous 12 V × 20 mA = 240 mW dissipation margin, ensuring thermal reliability.	Use Scenario: On-board voltage standard for self-calibrating multimeters and DAQ modules. IC Role / Device Role / Timing Role: Fixed 2.7 V reference source used to verify DAC linearity and ADC gain error. Use Value: Hermetic DO-35 packaging prevents aging-induced V_Z drift, maintaining calibration traceability over 5+ years.

Portable Sensor Reference

Low-Power Microcontroller Reset

Use Scenario: Providing stable 2.7 V reference for ADCs in coin-cell–powered environmental sensors.

IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise input scaling for analog front-end amplifiers.

Use Value: Ultra-low 1 µA leakage preserves battery life over multi-year deployments while maintaining ±0.1% reference accuracy.

Use Scenario: Generating reset threshold for 3 V–rated MCUs in energy-harvesting nodes.

IC Role / Device Role / Timing Role: Zener-clamped voltage monitor triggering POR circuitry during brown-out events.

Use Value: Tight ±5% V_Z tolerance ensures deterministic reset activation at 2.57–2.84 V, eliminating false triggers.

Industrial Current Loop Bias

Calibration Standard in Test Equipment

Use Scenario: Setting bias point for 4–20 mA transmitter output stages operating from 12 V rails.

IC Role / Device Role / Timing Role: Precision shunt regulator stabilizing op-amp reference voltage in loop-powered transmitters.

Use Value: 500 mW rating supports continuous 12 V × 20 mA = 240 mW dissipation margin, ensuring thermal reliability.

Use Scenario: On-board voltage standard for self-calibrating multimeters and DAQ modules.

IC Role / Device Role / Timing Role: Fixed 2.7 V reference source used to verify DAC linearity and ADC gain error.

Use Value: Hermetic DO-35 packaging prevents aging-induced V_Z drift, maintaining calibration traceability over 5+ years.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N4728A	3.3 V nominal, 1 W rating, DO-41 package, ±5% tolerance	Higher voltage and power; unsuitable for sub-3 V references but better for 3.3 V rail clamping	Select when 3.3 V regulation and higher surge immunity are required; not interchangeable due to V_Z and package mismatch.
BZX55C2V7	2.7 V nominal, 500 mW, DO-35, ±5%, but rated for 100 µA I_R @ V_R = 2.16 V (vs. 1 µA for 1N4682)	Higher leakage limits performance in nanoamp-bias circuits like photodiode amps	Acceptable for general-purpose 2.7 V clamping; avoid where <5 µA leakage is mandatory.

Compared with 1N4682, the 1N4728A offers higher power and voltage but lacks the ultra-low leakage needed for precision low-voltage references, while the BZX55C2V7 matches voltage and package but trades 10× higher leakage-making 1N4682 uniquely suited for microamp-regulated systems.

Availability

1N4682 is available at Aetrix Electronics and suitable for portable sensor reference, low-power microcontroller reset, and industrial current loop bias applications requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for 1N4682 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 1N4682 belongs to the legacy 1N4678 Series of low-leakage, oxide-passivated Zener diodes engineered specifically for precision low-voltage (<3 V) reference and regulation in battery-constrained and high-reliability systems.

FAQ

What is the exact zener voltage tolerance for 1N4682?

The 1N4682 has a nominal zener voltage of 2.7 V with a standard tolerance of ±5%, resulting in a guaranteed range of 2.565 V to 2.835 V when measured at I_ZT = 1 mA and lead temperature of 30°C. This tolerance is specified per JEDEC standards and applies to all units in the series without binning.

Can 1N4682 be used in surface-mount designs?

No, the 1N4682 is exclusively offered in the axial-lead DO-35 (DO-204AH) glass package and is not available in SMD variants. It requires through-hole mounting or axial-leaded PCB footprints; no compatible SMT drop-in replacement exists within the same electrical specification set.

What is the maximum reverse leakage current for 1N4682 at 25°C?

The 1N4682 guarantees reverse leakage current ≤1 µA when tested at V_R = 2.16 V (80% of nominal V_Z) and ambient temperature of 25°C. This ultra-low leakage is confirmed in the official ON Semiconductor datasheet page 199 and is critical for micro-power applications.

How does thermal derating affect 1N4682's power handling?

The 1N4682 is rated for 500 mW at lead temperature (T_L) ≤75°C and derates linearly at 4.0 mW/°C above that point. At T_L = 100°C, its usable power drops to 400 mW. Effective thermal design requires minimizing lead-to-ambient resistance via short leads and copper pour to maintain safe junction temperatures.

Is 1N4682 suitable for ESD protection circuits?

While the 1N4682 carries a Class 3 (>16 kV HBM) ESD rating, it is not designed or characterized as an ESD protection device. Its primary function is precision voltage regulation; dedicated TVS diodes such as the PUSB3FR or ESD9X series are recommended for I/O line protection instead of 1N4682.

1N4682 Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

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

Packaging:: Bulk

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 2.7 V

Tolerance:: ±5%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: -

Current - Reverse Leakage @ Vr:: 1 µA @ 1 V

Voltage - Forward (Vf) (Max) @ If:: 1.5 V @ 100 mA

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-204AH (DO-35)

1N4682 FAQ

1.How can I place an order for 1N4682 through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N4682 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 1N4682 reliable?

The price and inventory of 1N4682 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4682 is usually 5 days.

3.What payment methods are accepted for 1N4682?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4682 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N4682?

1N4682 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N4682 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 1N4682?

For technical support, including 1N4682 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4682 requirements.

6.How does Aetrix verify that 1N4682 is sourced from the original manufacturer or authorized distributors?

All 1N4682 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 1N4682 meets industry standards.

7.What is the process for return or replacement of 1N4682?

All 1N4682 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4682, 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 1N4682 part is unused and in its original packaging.

Return procedure for 1N4682:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…