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onsemi BZX79C7V5_T50R
- Part No.:
- BZX79C7V5_T50R
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
BZX79C7V5_T50R.pdf
- Description:
- DIODE ZENER 7.5V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:8,819
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Product details
Overview
BZX79C7V5_T50R from ON Semiconductor is a 7.5 V, 5% tolerance, 500 mW DO-35 glass-case Zener diode optimized for voltage regulation and reference applications in low-power analog circuits, power supply feedback loops, and overvoltage protection circuits.
For engineers reviewing the BZX79C7V5_T50R datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage accuracy (7.0–7.9 V), dynamic impedance (15 Ω @ 5 mA), temperature coefficient (+2.5 mV/°C), leakage current (1 μA @ 5 V), and DO-35 package compatibility with through-hole PCB layouts.
Technical Context
The BZX79C7V5_T50R operates as a silicon planar Zener diode with controlled reverse breakdown at nominal 7.5 V. It maintains stable regulation under DC bias conditions with specified test current IZ = 5 mA and exhibits a positive temperature coefficient of +2.5 mV/°C - enabling predictable drift compensation in precision references.
Its 500 mW power rating is derated linearly above 75°C (4.0 mW/°C), and it supports operation across -65°C to +200°C ambient and storage temperatures. The device features a maximum capacitance of 80 pF at VR = 0 V, f = 1 MHz, making it suitable for low-frequency stabilization without signal coupling concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.0 V min to 7.9 V max at IZ = 5 mA - defines usable regulation window for ±5% tolerance design margin |
| Power Dissipation (PD) | 500 mW @ TL ≤ 75°C - sets maximum continuous DC power handling in standard lead-length mounting |
| Dynamic Impedance (ZZ) | 15 Ω max @ IZ = 5 mA - determines output voltage stability under load current variation |
| Leakage Current (IR) | 1 μA max @ VR = 5 V - ensures minimal error current in high-impedance reference nodes |
| Temperature Coefficient (TC) | +2.5 mV/°C - quantifies voltage drift per degree Celsius for thermal error budgeting |
| Capacitance (C) | 80 pF max @ VR = 0 V, f = 1 MHz - limits high-frequency noise coupling in sensitive analog stages |
| Forward Voltage (VF) | 1.5 V max @ IF = 100 mA - confirms standard silicon diode conduction behavior in forward bias |
Pinout & Package
DO-35 glass axial package with cathode indicated by color band; two-terminal device requiring no orientation-specific PCB footprint beyond standard diode polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground node | Connected to lower-potential side in reverse-bias regulation; serves as return path for reference current |
| Cathode | Zener breakdown terminal / voltage reference output node | Connected to regulated voltage rail; supplies stable 7.5 V reference when reverse biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables direct use in cost-sensitive regulation without post-production trimming |
| DO-35 glass package | Provides hermetic sealing and thermal stability for industrial-grade reliability |
| Low dynamic impedance (15 Ω) | Minimizes output voltage variation under ±1 mA load current shifts |
| Controlled +2.5 mV/°C TC | Allows predictable thermal drift modeling in temperature-compensated references |
| 1.5 V forward voltage limit | Ensures compatibility with standard TTL/CMOS logic-level drive in clamp configurations |
Applications
| Power Supply Feedback | Overvoltage Clamp |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback or buck-derived DC-DC converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Zener reference element setting precise feedback threshold for PWM controller error amplifier. Use Value: Delivers stable 7.5 V reference with <15 Ω impedance, minimizing feedback loop gain error and improving load regulation accuracy. | Use Scenario: Protecting microcontroller I/O pins from transient overvoltage events on sensor input lines. IC Role / Device Role / Timing Role: Shunt clamping device diverting excess energy to ground before voltage exceeds safe logic threshold. Use Value: Activates reliably at 7.5 V with <1 μA leakage below 5 V, preserving signal integrity during normal operation. |
| Voltage Reference | Current Source Bias |
Use Scenario: Providing stable bias voltage for op-amp-based current sources or DAC reference buffers. IC Role / Device Role / Timing Role: Precision DC reference node establishing fixed potential for analog circuit biasing. Use Value: Maintains ±5% tolerance and +2.5 mV/°C drift, enabling sub-1% absolute accuracy over 0–70°C industrial range. | Use Scenario: Setting constant current in LED driver or sensor excitation circuits using resistor-Zener configuration. IC Role / Device Role / Timing Role: Voltage-setting element defining emitter/base bias point in transistor current mirror topologies. Use Value: Supports 5 mA nominal operating current with 15 Ω ZZ, ensuring <0.1 V compliance error across 10% load variation. |
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 7.5 V nominal, 5% tolerance, but higher ZZ (10 Ω typ vs. 15 Ω max) and DO-41 package (larger footprint) | Higher surge capability (1 W) but less suitable for space-constrained DO-35 layouts | Select when higher pulse power handling is required and board area permits larger axial package |
| MMSZ4700 | SMT SOD-123 package, same 7.5 V/5%, but lower PD (500 mW derated to 350 mW at TA = 25°C) and higher ZZ (30 Ω max) | Designed for automated assembly; not drop-in compatible due to footprint and thermal profile differences | Select for high-volume PCB assembly where reflow compatibility and smaller size outweigh discrete thermal performance needs |
Compared with 1N4734A and MMSZ4700, the BZX79C7V5_T50R offers optimal balance of DO-35 mechanical fit, 500 mW continuous dissipation, and 15 Ω dynamic impedance - making it preferred for legacy through-hole designs requiring proven industrial reliability and thermal stability.
Availability
BZX79C7V5_T50R is available at Aetrix Electronics and suitable for power supply feedback, overvoltage clamp, and voltage reference applications requiring stable component supply across industrial, automotive, and consumer electronics programs.
Supply support for BZX79C7V5_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, and sensing solutions for automotive, industrial, and cloud infrastructure markets.
The BZX79C series was designed specifically for general-purpose voltage regulation and reference functions in cost-sensitive, high-reliability through-hole applications - emphasizing tight tolerance, stable TC, and robust DO-35 packaging.
FAQ
What is the nominal Zener voltage of the BZX79C7V5_T50R?
The BZX79C7V5_T50R has a nominal Zener voltage of 7.5 V, with a guaranteed range of 7.0 V to 7.9 V at test current IZ = 5 mA. This ±5% tolerance is specified per the ON Semiconductor datasheet Rev. 3 (November 2017), and the "7V5" in the part number directly encodes this 7.5 V rating. The BZX79C7V5_T50R achieves this regulation in reverse-bias mode with minimal dynamic impedance.
What package type does the BZX79C7V5_T50R use?
The BZX79C7V5_T50R uses the DO-35 glass axial package, identified by its cylindrical glass body and color-coded cathode band. This package is standardized for through-hole mounting, supports 500 mW power dissipation at lead temperature ≤75°C, and is mechanically and thermally distinct from DO-41 or SMD variants. The BZX79C7V5_T50R's DO-35 form factor ensures compatibility with legacy socketed and wave-soldered assemblies.
What is the maximum leakage current for the BZX79C7V5_T50R?
The BZX79C7V5_T50R specifies a maximum leakage current (IR) of 1 μA at reverse voltage VR = 5 V and TA = 25°C. This low leakage ensures minimal error current in high-impedance reference circuits and preserves accuracy in battery-powered or low-quiescent-current designs. The value is confirmed in the Electrical Characteristics table of the official ON Semiconductor datasheet for the BZX79C7V5_T50R.
Does the BZX79C7V5_T50R have a positive or negative temperature coefficient?
The BZX79C7V5_T50R has a positive temperature coefficient of +2.5 mV/°C, meaning its Zener voltage increases predictably with rising junction temperature. This characteristic is documented in the datasheet's Electrical Characteristics table for devices in the 6.2–9.1 V range and enables thermal drift compensation in precision analog circuits. Unlike lower-voltage Zeners with negative TC, the BZX79C7V5_T50R's +2.5 mV/°C behavior supports stable reference design across industrial temperature ranges.
Can the BZX79C7V5_T50R be used in forward-bias applications?
Yes, the BZX79C7V5_T50R can operate in forward bias with a maximum forward voltage (VF) of 1.5 V at IF = 100 mA, consistent with standard silicon diode conduction. While primarily intended for reverse-bias regulation, this forward characteristic allows use in polarity protection, basic rectification, or logic-level clamping where moderate current handling suffices. The BZX79C7V5_T50R's forward behavior is fully specified and validated in the ON Semiconductor datasheet.
BZX79C7V5_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):
- 7.5 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 5 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
BZX79C7V5_T50R FAQ
1.How can I place an order for BZX79C7V5_T50R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX79C7V5_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 BZX79C7V5_T50R reliable?
The price and inventory of BZX79C7V5_T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX79C7V5_T50R is usually 5 days.
3.What payment methods are accepted for BZX79C7V5_T50R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX79C7V5_T50R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX79C7V5_T50R?
BZX79C7V5_T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX79C7V5_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 BZX79C7V5_T50R?
For technical support, including BZX79C7V5_T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX79C7V5_T50R requirements.
6.How does Aetrix verify that BZX79C7V5_T50R is sourced from the original manufacturer or authorized distributors?
All BZX79C7V5_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 BZX79C7V5_T50R meets industry standards.
7.What is the process for return or replacement of BZX79C7V5_T50R?
All BZX79C7V5_T50R units undergo pre-shipment inspection (PSI). If there is an issue with BZX79C7V5_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 BZX79C7V5_T50R part is unused and in its original packaging.
Return procedure for BZX79C7V5_T50R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX79C7V5_T50R Tags
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MMBZ5240B-7-F
Diodes Incorporated
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