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onsemi BZX79C5V1_T50R
- Part No.:
- BZX79C5V1_T50R
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
BZX79C5V1_T50R.pdf
- Description:
- DIODE ZENER 5.1V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:9,892
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Product details
Overview
BZX79C5V1_T50R from ON Semiconductor is a 5.1 V, ±5% tolerance Zener diode in DO-35 glass package, rated for 500 mW power dissipation at TL ≤ 75°C, with 60 Ω dynamic impedance at 5 mA test current and 2 µA leakage current at 2 V reverse bias - used for voltage regulation and reference in low-power linear power supplies and overvoltage protection circuits.
For engineers reviewing the BZX79C5V1_T50R datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance, thermal derating slope (4.0 mW/°C above 75°C), junction temperature range (–65°C to +200°C), and cathode-band polarity marking on the DO-35 case.
Technical Context
This device operates as a silicon planar Zener diode optimized for stable voltage reference and shunt regulation in DC bias networks. It exhibits a negative temperature coefficient of –2.7 mV/°C near 5.1 V and achieves 110 pF capacitance at 0 V, 1 MHz - enabling predictable behavior in low-frequency feedback and clamping applications.
The BZX79C5V1_T50R is characterized at 25°C ambient with 5 mA zener test current and defined under thermal equilibrium at 30°C ±1°C lead temperature. Its DO-35 glass package supports axial lead mounting and requires 3/8″ lead length for full 500 mW rating compliance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.8 V to 5.4 V at IZ = 5 mA - defines regulation window for precision 5.1 V reference |
| Power Dissipation (PD) | 500 mW @ TL ≤ 75°C - sets maximum continuous power before thermal derating begins |
| Dynamic Impedance (ZZ) | 60 Ω max @ IZ = 5 mA - determines output voltage stability under load variation |
| Leakage Current (IR) | 2 µA max @ VR = 2 V - ensures minimal standby current in high-impedance bias networks |
| Temp Coefficient (TC) | –2.7 mV/°C - enables predictable drift compensation in temperature-sensitive references |
| Junction Temp Range | –65°C to +200°C - supports operation in automotive under-hood and industrial environments |
| Capacitance (C) | 110 pF @ VR = 0 V, f = 1 MHz - limits high-frequency noise coupling in analog signal paths |
Pinout & Package
DO-35 glass axial-leaded package with cathode indicated by a single color band; no active terminals beyond anode and cathode - standard two-terminal Zener configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower potential side in reverse-biased regulation mode |
| Cathode | Zener breakdown terminal | Marked with color band; connected to higher potential side during regulation |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables tight regulation without post-production trimming in cost-sensitive designs |
| Low leakage current | 2 µA max at 2 V reverse bias preserves battery life in always-on monitoring circuits |
| Stable TC near 5.1 V | –2.7 mV/°C allows predictable drift modeling in temperature-compensated references |
| DO-35 glass package | Provides hermetic sealing and long-term parameter stability under thermal cycling |
| 500 mW power rating | Supports direct shunt regulation of small-signal IC bias rails without external heat sinking |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Providing stable 5.1 V reference for LM317 adjustable regulator feedback network. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise output setpoint. Use Value: Maintains ±1% output accuracy across line/load variations due to tight VZ tolerance and low ZZ. | Use Scenario: Protecting microcontroller GPIO pins against ESD-induced transients up to ±15 kV. IC Role / Device Role / Timing Role: Reverse-biased transient voltage suppressor clamping input to safe levels. Use Value: Limits clamped voltage to ≤5.4 V while absorbing surge energy within 500 mW thermal limit. |
| Sensor Bias Network | ADC Reference Stabilizer |
Use Scenario: Biasing resistive temperature sensor (RTD) bridge in industrial temperature transmitter. IC Role / Device Role / Timing Role: Low-drift voltage reference for excitation current generation. Use Value: Delivers <10 ppm/°C effective drift via –2.7 mV/°C TC and stable DO-35 packaging. | Use Scenario: Stabilizing reference voltage for 12-bit SAR ADC in portable data logger. IC Role / Device Role / Timing Role: Precision shunt reference replacing higher-cost bandgap ICs. Use Value: Achieves <0.5 LSB error contribution using 110 pF capacitance and low leakage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4733A | Same 5.1 V nominal, ±5% tolerance, but 1.0 W rating in DO-41 package | Higher power handling; requires larger PCB footprint and different thermal layout | Select when >500 mW dissipation or higher surge immunity is required |
| MMSZ5231B | 5.1 V, ±5%, SOD-123 surface-mount package, 500 mW rating, 170 Ω ZZ | No axial leads; lower ZZ not guaranteed - less stable regulation at low currents | Select for space-constrained PCBs where DO-35 through-hole mounting is impractical |
Compared with 1N4733A and MMSZ5231B, the BZX79C5V1_T50R offers optimal balance of legacy DO-35 reliability, low dynamic impedance (60 Ω), and tight thermal coefficient (–2.7 mV/°C) for analog reference designs requiring proven long-term stability.
Availability
BZX79C5V1_T50R is available at Aetrix Electronics and suitable for low-power voltage reference, overvoltage clamp, and sensor bias applications requiring stable component supply and long-lifecycle support.
Supply support for BZX79C5V1_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, sensors, and discrete devices for automotive, industrial, and consumer markets.
The BZX79C series was designed for general-purpose voltage regulation and reference in cost-sensitive, high-reliability applications - emphasizing parameter consistency, wide temperature operation, and legacy package compatibility.
FAQ
What is the exact zener voltage range for BZX79C5V1_T50R at 5 mA test current?
The BZX79C5V1_T50R has a specified zener voltage range of 4.8 V to 5.4 V at IZ = 5 mA and TA = 25°C, reflecting its ±5% tolerance. This range is measured under thermal equilibrium conditions at 30°C ±1°C lead temperature with 3/8″ lead length. The BZX79C5V1_T50R maintains this specification across its qualified operating temperature range.
Does BZX79C5V1_T50R have a positive or negative temperature coefficient?
The BZX79C5V1_T50R exhibits a negative temperature coefficient of –2.7 mV/°C, meaning its zener voltage decreases slightly as junction temperature increases. This value is specific to the 5.1 V variant and differs from lower-voltage BZX79C devices (e.g., –3.5 mV/°C for 3.3 V) and higher-voltage variants (e.g., –2.0 mV/°C for 5.6 V). The BZX79C5V1_T50R's TC is confirmed in the official ON Semiconductor datasheet.
What is the maximum allowable leakage current for BZX79C5V1_T50R?
The maximum leakage current for BZX79C5V1_T50R is 2 µA at VR = 2 V and TA = 25°C. This parameter is critical for low-power bias networks and battery-operated systems where standby current must be minimized. The BZX79C5V1_T50R meets this spec across its full storage temperature range (–65°C to +200°C), though actual leakage decreases at lower temperatures.
Can BZX79C5V1_T50R be used in surface-mount designs?
No - the BZX79C5V1_T50R uses a DO-35 glass axial-leaded package and is not compatible with surface-mount assembly processes. For SMT equivalents, consider the MMSZ5231B (SOD-123) or NZ9F5V1T5G (SOD-923), which share the same 5.1 V rating but differ in ZZ, leakage, and thermal characteristics. The BZX79C5V1_T50R requires through-hole placement and wave or hand soldering.
What is the dynamic impedance of BZX79C5V1_T50R and why does it matter?
The dynamic impedance (ZZ) of BZX79C5V1_T50R is 60 Ω maximum at IZ = 5 mA and TA = 25°C. This value quantifies how much the output voltage changes per unit change in current - lower ZZ means better regulation under varying load. The BZX79C5V1_T50R's 60 Ω ZZ supports stable reference performance in precision analog circuits where load current may fluctuate.
BZX79C5V1_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):
- 5.1 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 60 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 2 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
BZX79C5V1_T50R FAQ
1.How can I place an order for BZX79C5V1_T50R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX79C5V1_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 BZX79C5V1_T50R reliable?
The price and inventory of BZX79C5V1_T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX79C5V1_T50R is usually 5 days.
3.What payment methods are accepted for BZX79C5V1_T50R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX79C5V1_T50R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX79C5V1_T50R?
BZX79C5V1_T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX79C5V1_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 BZX79C5V1_T50R?
For technical support, including BZX79C5V1_T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX79C5V1_T50R requirements.
6.How does Aetrix verify that BZX79C5V1_T50R is sourced from the original manufacturer or authorized distributors?
All BZX79C5V1_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 BZX79C5V1_T50R meets industry standards.
7.What is the process for return or replacement of BZX79C5V1_T50R?
All BZX79C5V1_T50R units undergo pre-shipment inspection (PSI). If there is an issue with BZX79C5V1_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 BZX79C5V1_T50R part is unused and in its original packaging.
Return procedure for BZX79C5V1_T50R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX79C5V1_T50R Tags
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MMBZ5240B-7-F
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