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onsemi BZX79C15_NT50R
- Part No.:
- BZX79C15_NT50R
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
BZX79C15_NT50R.pdf
- Description:
- DIODE ZENER 15V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:2,005
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Product details
Overview
BZX79C15_NT50R from ON Semiconductor is a 15 V, 5% tolerance, 500 mW DO-35 glass-case Zener diode optimized for voltage regulation and reference applications in power supply feedback loops, overvoltage protection circuits, and precision biasing networks. It delivers stable 15 V Zener voltage at 5 mA test current with 30 Ω dynamic impedance and operates across –65 °C to +200 °C.
For engineers reviewing the BZX79C15_NT50R datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±5%), thermal coefficient (+9.2 mV/°C), leakage current (≤0.05 μA at 12 V), and DO-35 package compatibility with through-hole PCB assembly.
Technical Context
This discrete Zener diode functions as a two-terminal shunt voltage regulator, maintaining a stable reverse-biased breakdown voltage under controlled current conditions. Its operation relies on avalanche and Zener mechanisms depending on voltage level, with dominant Zener behavior below ~6 V and mixed/avalanche dominance above - confirmed by its positive temperature coefficient (+9.2 mV/°C) at 15 V.
The device is rated for 500 mW power dissipation at lead temperature ≤75 °C, derating linearly at 4.0 mW/°C above that threshold. Its 30 Ω dynamic impedance at IZ = 5 mA ensures low output variation under load changes, and its 55 pF capacitance at VR = 0 V, f = 1 MHz supports stable performance in low-frequency regulation and clamping roles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 13.8 V min / 15.6 V max at IZ = 5 mA - defines regulated output range for feedback or reference use |
| Tolerance | ±5% - enables predictable voltage setting without post-calibration in cost-sensitive designs |
| Power Dissipation (PD) | 500 mW @ TL ≤ 75 °C - sets maximum continuous power handling in standard leaded mounting |
| Dynamic Impedance (ZZ) | 30 Ω max at IZ = 5 mA - determines output voltage stability under varying load current |
| Leakage Current (IR) | ≤0.05 μA at VR = 12 V - ensures minimal standby current in high-impedance bias networks |
| Temp. Coefficient (TC) | +9.2 mV/°C - quantifies voltage drift with ambient temperature change in unregulated environments |
| Junction Temp. Range | –65 °C to +200 °C - supports operation in automotive under-hood and industrial high-temp environments |
Pinout & Package
DO-35 glass axial package with cathode band marking; leads are non-polarized terminals - anode and cathode defined by color band (cathode). No internal bonding or multi-pin configuration; functionally a two-terminal device.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener reference ground node | Connected to circuit common or lower potential side in shunt regulation |
| Cathode | Zener breakdown terminal / regulated output node | Connected to input or higher potential side; voltage referenced to anode |
Key Features
| Feature | Design Value |
|---|---|
| Stable 15 V reference | Guaranteed 13.8–15.6 V range at 5 mA enables repeatable voltage setting in analog feedback paths |
| Low leakage current | ≤0.05 μA at 12 V minimizes error in high-resistance divider networks and battery-powered references |
| High-temperature operation | Rated to +200 °C junction temperature supports reliability in engine control and industrial motor drive modules |
| Standard DO-35 footprint | Enables drop-in replacement and compatibility with legacy through-hole assembly lines and repair workflows |
| 5% voltage tolerance | Reduces need for binning or trimming in production while maintaining sufficient accuracy for non-precision regulation |
Applications
| Power Supply Feedback Regulation | Overvoltage Clamp Protection |
|---|---|
Use Scenario: Used in TL431-based or discrete op-amp feedback loops to set output voltage of DC-DC converters and linear regulators. IC Role / Device Role / Timing Role: Zener reference element providing stable 15 V threshold for error amplifier comparison. Use Value: Maintains ±5% output voltage accuracy across temperature and line variations due to tight VZ tolerance and low ZZ. | Use Scenario: Placed across sensitive IC inputs or bus lines to clamp transient overvoltages exceeding 15.6 V. IC Role / Device Role / Timing Role: Shunt clamping device diverting surge current away from downstream logic or analog circuitry. Use Value: Limits peak voltage to ≤15.6 V with <0.05 μA leakage, preserving signal integrity during normal operation. |
| Reference Voltage Biasing | Temperature-Stable Sensor Excitation |
Use Scenario: Supplies bias voltage to precision op-amps, ADC references, or analog front-end components requiring stable mid-rail or offset voltages. IC Role / Device Role / Timing Role: Passive voltage reference source establishing fixed DC operating point in analog signal chains. Use Value: Delivers 15 V ±5% with +9.2 mV/°C TC, enabling predictable drift compensation in calibrated systems. | Use Scenario: Powers resistive temperature sensors (RTDs) or bridge transducers where excitation voltage stability directly impacts measurement accuracy. IC Role / Device Role / Timing Role: Low-drift excitation source ensuring consistent sensor output scaling across operating temperature range. Use Value: Supports <±0.1% full-scale error contribution over –40 °C to +125 °C ambient due to specified TC and low ZZ. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4744A | 14 V nominal, ±5% tolerance, 1 W power rating, DO-41 package | Higher power handling but larger footprint; requires layout revision for DO-41 vs DO-35 | Select when >500 mW dissipation or higher surge energy clamping is required |
| BZX55C15 | 15 V nominal, ±5% tolerance, 500 mW, DO-35 package, 35 Ω ZZ | Nearly identical electrical specs but slightly higher dynamic impedance and different manufacturer qualification | Preferred for second-source continuity where ON Semi's BZX79C15_NT50R is unavailable |
Compared with 1N4744A and BZX55C15, the BZX79C15_NT50R offers tighter thermal coefficient control (+9.2 mV/°C vs typical +10.5 mV/°C), lower leakage (<0.05 μA), and DO-35 compatibility - making it optimal for space-constrained, low-power, temperature-sensitive regulation tasks.
Availability
BZX79C15_NT50R is available at Aetrix Electronics and suitable for power supply feedback regulation, overvoltage clamp protection, and reference voltage biasing requiring stable component supply across automotive, industrial control, and consumer electronics programs.
Supply support for BZX79C15_NT50R 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 (now onsemi) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The BZX79C series was designed for general-purpose voltage regulation and reference applications in cost-sensitive, high-reliability through-hole assemblies - emphasizing robustness, wide temperature operation, and standardized DO-35 compatibility.
FAQ
What is the Zener voltage range for BZX79C15_NT50R?
The BZX79C15_NT50R has a guaranteed Zener voltage range of 13.8 V to 15.6 V at a test current of 5 mA, reflecting its ±5% tolerance specification. This range is validated per ON Semiconductor's BZX79C2V4–BZX79C56 datasheet Rev. 3 (November 2017) and applies under thermal equilibrium conditions at lead temperature 30°C ±1°C. The BZX79C15_NT50R maintains this performance across its full operating temperature range.
What is the maximum power dissipation of BZX79C15_NT50R?
The BZX79C15_NT50R is rated for 500 mW maximum power dissipation at lead temperature ≤75°C, with a linear derating factor of 4.0 mW/°C above that temperature. This rating assumes standard 3/8" lead length and free-air conditions. Exceeding this limit risks thermal runaway or permanent degradation. The BZX79C15_NT50R must be mounted with adequate thermal relief in high-power applications.
Does BZX79C15_NT50R have a specified dynamic impedance?
Yes, the BZX79C15_NT50R has a maximum dynamic impedance (ZZ) of 30 Ω at IZ = 5 mA, as specified in the ON Semiconductor datasheet. This value reflects the slope of the Zener breakdown region and directly impacts regulation accuracy under varying load conditions. Lower ZZ improves voltage stability - the BZX79C15_NT50R's 30 Ω rating supports reliable performance in feedback and reference circuits.
What is the leakage current specification for BZX79C15_NT50R?
The BZX79C15_NT50R exhibits a maximum leakage current (IR) of 0.05 μA at reverse voltage (VR) = 12 V and TA = 25°C. This ultra-low leakage ensures minimal error in high-impedance voltage divider networks and preserves battery life in always-on monitoring circuits. The BZX79C15_NT50R maintains this spec across its full storage temperature range of –65°C to +200°C.
What package type does BZX79C15_NT50R use?
The BZX79C15_NT50R uses the DO-35 glass axial package with cathode band marking, consistent with the entire BZX79C2V4–BZX79C56 family. Its dimensions and lead spacing comply with industry-standard through-hole mounting requirements, enabling compatibility with legacy PCB footprints and automated insertion equipment. The BZX79C15_NT50R's DO-35 package supports operation up to +200°C junction temperature.
BZX79C15_NT50R 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):
- 15 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 10.5 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
BZX79C15_NT50R FAQ
1.How can I place an order for BZX79C15_NT50R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX79C15_NT50R 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 BZX79C15_NT50R reliable?
The price and inventory of BZX79C15_NT50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX79C15_NT50R is usually 5 days.
3.What payment methods are accepted for BZX79C15_NT50R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX79C15_NT50R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX79C15_NT50R?
BZX79C15_NT50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX79C15_NT50R 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 BZX79C15_NT50R?
For technical support, including BZX79C15_NT50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX79C15_NT50R requirements.
6.How does Aetrix verify that BZX79C15_NT50R is sourced from the original manufacturer or authorized distributors?
All BZX79C15_NT50R 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 BZX79C15_NT50R meets industry standards.
7.What is the process for return or replacement of BZX79C15_NT50R?
All BZX79C15_NT50R units undergo pre-shipment inspection (PSI). If there is an issue with BZX79C15_NT50R, 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 BZX79C15_NT50R part is unused and in its original packaging.
Return procedure for BZX79C15_NT50R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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