My Inquiry
My Account
onsemi BZX79C2V4_T50R
- Part No.:
- BZX79C2V4_T50R
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
BZX79C2V4_T50R.pdf
- Description:
- DIODE ZENER 2.4V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:4,430
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX79C2V4_T50R from ON Semiconductor is a 2.4 V, ±5% tolerance Zener diode in DO-35 glass package, rated for 500 mW power dissipation at TL ≤ 75°C, with 100 Ω dynamic impedance at 5 mA test current and -3.5 mV/°C temperature coefficient - used for precision voltage reference and overvoltage protection in low-power linear regulators and sensor biasing circuits.
For engineers reviewing the BZX79C2V4_T50R datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance, thermal coefficient, dynamic impedance at specified test current, leakage current at rated reverse voltage, and DO-35 package compatibility with through-hole PCB layouts.
Technical Context
This device operates as a silicon planar Zener diode optimized for stable voltage regulation in low-current, low-power applications. It achieves nominal 2.4 V breakdown at 5 mA (IZ), with guaranteed min/max zener voltage of 2.2 V to 2.6 V and maximum 100 Ω impedance at that current.
The -3.5 mV/°C temperature coefficient indicates predictable, negative drift with rising junction temperature, and its 100 μA leakage current at 1 V reverse bias supports low-quiescent-current designs. The DO-35 glass package enables reliable operation across -65°C to +200°C ambient and storage conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.4 V ±5% (2.2–2.6 V range at IZ = 5 mA) - defines precise clamping/reference level |
| Power Dissipation (PD) | 500 mW @ TL ≤ 75°C - sets maximum continuous power handling before thermal derating |
| Dynamic Impedance (ZZ) | 100 Ω max @ IZ = 5 mA - determines regulation stiffness under load variation |
| Temperature Coefficient (TC) | -3.5 mV/°C - quantifies voltage drift per degree Celsius rise in junction temperature |
| Leakage Current (IR) | 100 μA max @ VR = 1 V - ensures minimal parasitic current in standby or high-impedance bias networks |
| Operating Temp Range | -65°C to +200°C - supports deployment in automotive under-hood, industrial, and aerospace environments |
Pinout & Package
DO-35 glass axial package with cathode indicated by color band; two-terminal device requiring no orientation-specific PCB footprint beyond standard 0.4 mm lead diameter and 2.5 mm body diameter.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground node | Connected to lower-potential side in reverse-bias regulation; forms return path for reference current |
| Cathode | Zener breakdown terminal / regulated output node | Connected to higher-potential rail; delivers stable 2.4 V when reverse-biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables tight reference accuracy without post-production trimming in cost-sensitive consumer and industrial designs |
| -3.5 mV/°C tempco | Allows predictable compensation in analog circuits where thermal drift must be modeled or canceled |
| 100 Ω dynamic impedance | Maintains <1% output variation across 1–10 mA load current changes in shunt regulator topologies |
| DO-35 glass package | Provides hermetic sealing and high-reliability performance in humid or corrosive environments |
Applications
| Low-Power Sensor Biasing | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Providing stable 2.4 V bias to analog front-end op-amps in battery-powered environmental sensors. IC Role / Device Role / Timing Role: Zener diode acts as precision shunt voltage reference for signal conditioning circuitry. Use Value: Enables accurate ADC conversion with <0.5% full-scale error over -40°C to +85°C due to tight VZ tolerance and known TC. | Use Scenario: Generating clean reset threshold for 3.3 V microcontrollers during brown-out conditions. IC Role / Device Role / Timing Role: Zener diode establishes reliable 2.4 V trip point for external reset supervisor ICs. Use Value: Prevents false resets by maintaining stable threshold despite supply ripple and temperature cycling. |
| Linear Regulator Shunt Reference | ESD Protection Clamp |
Use Scenario: Serving as voltage reference in discrete 5 V-to-3.3 V linear regulator using PNP pass transistor. IC Role / Device Role / Timing Role: Zener diode provides feedback reference for emitter-follower regulation loop. Use Value: Delivers <10 mV output variation across 1–5 mA load range thanks to low ZZ and stable VZ. | Use Scenario: Clamping transient surges on 3.3 V I²C bus lines in industrial control modules. IC Role / Device Role / Timing Role: Zener diode functions as low-energy bidirectional ESD clamp (anode-cathode tied to rail and line). Use Value: Limits voltage excursions to ≤2.6 V during 2 kV HBM events while drawing <1 mA peak current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4730A | Same 3.9 V nominal rating but different family; 5% tolerance, 500 mW, DO-41 package (larger than DO-35) | Requires PCB layout change due to longer leads and larger body; not drop-in compatible | Select only if DO-41 footprint is available and higher power margin is needed |
| BZX55C2V4 | Same 2.4 V rating and DO-35 package; ±5% tolerance, but 150 Ω ZZ @ 5 mA vs. 100 Ω for BZX79C2V4_T50R | Higher dynamic impedance reduces regulation accuracy under varying load | Acceptable for non-critical references where <2% output variation is tolerable |
Compared with 1N4730A and BZX55C2V4, BZX79C2V4_T50R offers tighter dynamic impedance and DO-35 compatibility - making it preferable for space-constrained, high-accuracy shunt references where thermal stability and board real estate are critical.
Availability
BZX79C2V4_T50R is available at Aetrix Electronics and suitable for low-power sensor biasing, microcontroller reset circuits, linear regulator shunt references, and ESD protection clamps requiring stable component supply and long-term obsolescence management.
Supply support for BZX79C2V4_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 energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The BZX79 series was designed specifically for general-purpose voltage regulation and reference applications where reliability, tight tolerance, and stable temperature behavior are required in compact through-hole packages.
FAQ
What is the nominal zener voltage and tolerance of BZX79C2V4_T50R?
The BZX79C2V4_T50R has a nominal zener voltage of 2.4 V with a ±5% tolerance, meaning its actual breakdown voltage falls between 2.2 V and 2.6 V when tested at 5 mA reverse current and 25°C ambient. This tolerance is guaranteed across the full operating temperature range and is verified per ON Semiconductor's BZX79C2V4 datasheet Rev. 3.
What is the maximum power dissipation rating for BZX79C2V4_T50R?
The BZX79C2V4_T50R is rated for 500 mW power dissipation at lead temperature (TL) ≤ 75°C with 3/8″ lead length. Above 75°C, it derates linearly at 4.0 mW/°C. This rating reflects safe continuous operation without exceeding junction temperature limits in standard through-hole mounting configurations.
What package type does BZX79C2V4_T50R use, and how is polarity marked?
The BZX79C2V4_T50R uses the DO-35 glass axial package. Polarity is indicated by a single color band near one end of the glass body, which denotes the cathode terminal. This marking aligns with JEDEC standards and is visible under standard visual inspection during manual or automated assembly.
What is the dynamic impedance of BZX79C2V4_T50R, and why does it matter?
The BZX79C2V4_T50R has a maximum dynamic impedance (ZZ) of 100 Ω at 5 mA test current. This value directly affects regulation accuracy: lower ZZ means smaller output voltage variation under changing load current - critical for stable reference generation in analog signal chains and precision power supplies.
Does BZX79C2V4_T50R have a specified temperature coefficient, and what is its value?
Yes, the BZX79C2V4_T50R has a temperature coefficient (TC) of -3.5 mV/°C. This negative coefficient quantifies how its zener voltage decreases with increasing junction temperature, enabling predictable thermal drift modeling in circuits where temperature-induced error must be bounded or compensated.
BZX79C2V4_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):
- 2.4 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 100 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 100 mA
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-35
BZX79C2V4_T50R FAQ
1.How can I place an order for BZX79C2V4_T50R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX79C2V4_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 BZX79C2V4_T50R reliable?
The price and inventory of BZX79C2V4_T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX79C2V4_T50R is usually 5 days.
3.What payment methods are accepted for BZX79C2V4_T50R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX79C2V4_T50R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX79C2V4_T50R?
BZX79C2V4_T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX79C2V4_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 BZX79C2V4_T50R?
For technical support, including BZX79C2V4_T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX79C2V4_T50R requirements.
6.How does Aetrix verify that BZX79C2V4_T50R is sourced from the original manufacturer or authorized distributors?
All BZX79C2V4_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 BZX79C2V4_T50R meets industry standards.
7.What is the process for return or replacement of BZX79C2V4_T50R?
All BZX79C2V4_T50R units undergo pre-shipment inspection (PSI). If there is an issue with BZX79C2V4_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 BZX79C2V4_T50R part is unused and in its original packaging.
Return procedure for BZX79C2V4_T50R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX79C2V4_T50R Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
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, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
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.
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.
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…
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…
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…
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 …
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…
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…
