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onsemi BZX79C16_T50R
- Part No.:
- BZX79C16_T50R
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
BZX79C16_T50R.pdf
- Description:
- DIODE ZENER 16V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:6,113
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Product details
Overview
BZX79C16_T50R from ON Semiconductor is a 16 V, ±5% tolerance, 500 mW glass-passivated Zener diode in DO-35 package, rated for 5 mA test current, 40 Ω dynamic impedance, and 0.05 μA leakage at 12.2 V, used for voltage regulation and reference in low-power linear power supplies and sensor biasing circuits.
For engineers reviewing the BZX79C16_T50R datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance, power dissipation derating above 75°C, cathode identification via color band, junction temperature range (–65°C to +200°C), and DO-35 mechanical compatibility with axial-leaded PCB layouts.
Technical Context
This device operates as a reverse-biased voltage reference diode, maintaining stable output voltage across varying load currents within its specified power limit. Its 40 Ω dynamic impedance at 5 mA ensures predictable regulation under small-signal variations, while the –65°C to +200°C operating range supports industrial and automotive under-hood environments.
The DO-35 glass package provides hermetic sealing and thermal stability, with cathode identified by a single axial color band. Forward voltage is ≤1.5 V at 100 mA, enabling basic polarity verification during functional testing without dedicated equipment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15.3 V min / 17.1 V max at IZ = 5 mA - defines regulation window for precision reference use |
| Power Dissipation (PD) | 500 mW @ TL ≤ 75°C - sets maximum continuous DC power handling on standard 3/8″ lead length |
| Dynamic Impedance (ZZ) | 40 Ω max at IZ = 5 mA - determines output voltage variation under load current changes |
| Leakage Current (IR) | 0.05 μA max at VR = 12.2 V - ensures minimal error current in high-impedance reference nodes |
| Operating Temp Range | –65°C to +200°C - enables deployment in extended-temperature industrial and automotive applications |
| Forward Voltage (VF) | ≤1.5 V at IF = 100 mA - allows quick cathode/anode verification using standard bench supply |
Pinout & Package
DO-35 glass axial package with cathode identified by a single color band; leads are unmarked anode/cathode terminals requiring visual orientation per marking convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node in reverse-bias regulation configuration |
| Cathode | Zener breakdown terminal | Marked with axial color band; connected to regulated voltage rail in shunt regulator topology |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables consistent reference accuracy without post-production trimming in cost-sensitive designs |
| DO-35 glass passivation | Provides moisture resistance and long-term parameter stability vs. plastic-packaged alternatives |
| 500 mW power rating with 4.0 mW/°C derating | Supports thermal design with predictable linear power reduction above 75°C ambient |
| 0.05 μA max leakage at 12.2 V | Minimizes error current in high-impedance feedback networks and battery-powered references |
Applications
| Low-Power Voltage Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Providing stable 16 V reference for ADC biasing or op-amp comparator thresholds in battery-operated sensors. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise DC potential independent of supply variation. Use Value: Maintains <±0.8 V regulation error over 1–10 mA load range due to 40 Ω ZZ and tight 5% VZ tolerance. | Use Scenario: Protecting microcontroller I/O pins from transient surges exceeding 16 V in industrial control inputs. IC Role / Device Role / Timing Role: Passive clamping element diverting excess energy to ground when input exceeds VZ. Use Value: Limits peak voltage to ≤17.1 V with 0.05 μA leakage below clamp threshold, minimizing standby power loss. |
| Linear Power Supply Regulation | Temperature-Stable Bias Network |
Use Scenario: Regulating 16 V rail for analog front-end circuitry in isolated AC/DC adapters with no feedback loop. IC Role / Device Role / Timing Role: Shunt regulator absorbing excess current to maintain constant output voltage. Use Value: Delivers stable regulation across –40°C to +85°C ambient with <±1.2 V total drift due to TC = +10.4 mV/°C. | Use Scenario: Setting bias point for NTC thermistor amplifier stages where reference drift must track temperature. IC Role / Device Role / Timing Role: Temperature-compensated voltage source leveraging known TC of +10.4 mV/°C. Use Value: Enables predictable offset compensation in analog signal chains without external tempco components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4742A | 12 V nominal, 1 W power rating, DO-41 package, 22 Ω ZZ | Higher power handling but lower VZ; requires larger footprint | Select when >500 mW dissipation or tighter ZZ needed; not drop-in due to voltage and package mismatch |
| BZX55C16 | Same 16 V rating, ±5% tolerance, but 500 mW in DO-35, 45 Ω ZZ, higher leakage (0.1 μA) | Nearly identical function and form; minor ZZ and leakage variance | Valid alternative with same mounting and thermal profile; verify leakage impact in ultra-low-current designs |
Compared with BZX79C16_T50R, the 1N4742A offers higher power but different voltage and package, while the BZX55C16 matches voltage and package closely but has marginally higher impedance and leakage-both require validation for critical reference stability.
Availability
BZX79C16_T50R is available at Aetrix Electronics and suitable for low-power voltage reference, overvoltage protection, and linear regulator applications requiring stable component supply across industrial, instrumentation, and embedded control designs.
Supply support for BZX79C16_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 logic devices for automotive, industrial, and consumer markets.
The BZX79C series delivers standardized, glass-passivated Zener diodes optimized for general-purpose voltage regulation and reference in cost-sensitive, space-constrained applications.
FAQ
What is the Zener voltage tolerance for BZX79C16_T50R?
The BZX79C16_T50R has a ±5% Zener voltage tolerance, resulting in a guaranteed regulation range of 15.3 V to 17.1 V at 5 mA test current. This tolerance is factory-trimmed and applies across the full operating temperature range, making BZX79C16_T50R suitable for applications where moderate reference accuracy is required without external calibration.
How does thermal derating work for BZX79C16_T50R?
BZX79C16_T50R is rated for 500 mW power dissipation up to 75°C lead temperature; above that, it derates linearly at 4.0 mW/°C. For example, at 100°C lead temperature, maximum allowable power drops to 400 mW. This derating ensures safe operation without exceeding junction temperature limits and must be applied when calculating worst-case power in enclosed or high-ambient environments.
What is the cathode identification method for BZX79C16_T50R?
The cathode of BZX79C16_T50R is identified by a single axial color band on the DO-35 glass body. This band aligns with the cathode terminal, which must be connected to the higher-potential side of the circuit in Zener regulation mode. The anode is the unmarked lead, and polarity must be verified before soldering to prevent reverse-bias damage during forward conduction tests.
Can BZX79C16_T50R be used in place of BZX79C15 or BZX79C18?
No-BZX79C16_T50R is not interchangeable with BZX79C15 (13.8–15.6 V) or BZX79C18 (16.8–19.1 V) due to non-overlapping Zener voltage ranges. Each part is calibrated to its specific nominal voltage and tolerance band; substituting across the BZX79C family requires verifying that the exact VZ range meets circuit regulation requirements, as even adjacent values are not guaranteed to overlap.
What is the maximum leakage current specification for BZX79C16_T50R?
The maximum leakage current for BZX79C16_T50R is 0.05 μA at 12.2 V reverse voltage (VR). This ultra-low leakage ensures minimal error current in high-impedance reference nodes and preserves battery life in always-on monitoring circuits. It is measured at 25°C and remains stable across the full –65°C to +200°C operating range, supporting reliable performance in harsh environments.
BZX79C16_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):
- 16 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 11.2 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
BZX79C16_T50R FAQ
1.How can I place an order for BZX79C16_T50R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX79C16_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 BZX79C16_T50R reliable?
The price and inventory of BZX79C16_T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX79C16_T50R is usually 5 days.
3.What payment methods are accepted for BZX79C16_T50R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX79C16_T50R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX79C16_T50R?
BZX79C16_T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX79C16_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 BZX79C16_T50R?
For technical support, including BZX79C16_T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX79C16_T50R requirements.
6.How does Aetrix verify that BZX79C16_T50R is sourced from the original manufacturer or authorized distributors?
All BZX79C16_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 BZX79C16_T50R meets industry standards.
7.What is the process for return or replacement of BZX79C16_T50R?
All BZX79C16_T50R units undergo pre-shipment inspection (PSI). If there is an issue with BZX79C16_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 BZX79C16_T50R part is unused and in its original packaging.
Return procedure for BZX79C16_T50R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX79C16_T50R Tags
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