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onsemi BZX85C16_T50R
- Part No.:
- BZX85C16_T50R
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZX85C16_T50R.pdf
- Description:
- DIODE ZENER 16V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:8,894
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Product details
Overview
BZX85C16_T50R from onsemi is a 16 V, ±5% tolerance, 1.0 W axial-leaded Zener diode in DO-41 glass package, rated for 15.3–17.1 V zener voltage at 15 mA test current, with 15 Ω dynamic impedance and 0.5 μA max leakage at 12.5 V reverse bias, used for voltage regulation and reference in power supply feedback loops.
For engineers reviewing the BZX85C16_T50R datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance, power derating above 50°C (6.67 mW/°C), thermal resistance (junction-to-lead), cathode band marking, and DO-41 mechanical compatibility with through-hole PCB layouts.
Technical Context
This device operates as a two-terminal silicon junction diode optimized for stable reverse-breakdown behavior. It maintains regulation across 15–200 mA operating current range with specified zener impedance (ZZ = 15 Ω @ IZ = 15 mA) and low leakage (IR ≤ 0.5 μA @ VR = 12.5 V).
Designed for thermal equilibrium at lead temperature TL = 30°C ±1°C per JEDEC test method, it supports operation from –65°C to +200°C and exhibits forward voltage ≤1.2 V at 200 mA forward current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15.3–17.1 V at IZ = 15 mA - defines regulated output voltage window under nominal bias |
| Power Dissipation (PD) | 1.0 W @ TA = 25°C - sets maximum continuous power handling without heatsinking |
| Zener Impedance (ZZ) | 15 Ω @ IZ = 15 mA - determines regulation stiffness and AC ripple rejection capability |
| Leakage Current (IR) | ≤0.5 μA @ VR = 12.5 V - ensures minimal error current in high-impedance reference paths |
| Tolerance | ±5% - specifies allowable deviation of VZ from nominal 16 V rating at production test conditions |
| Package | DO-41 glass axial - provides hermetic sealing, standard lead spacing (25.4 mm min), and JEDEC-compliant mounting |
| Operating Temp | –65°C to +200°C - enables use in automotive engine compartments and industrial environments |
Pinout & Package
DO-41 glass axial package with cathode indicated by a single color band on the body. Two terminals: anode (unmarked end) and cathode (banded end). No internal circuitry; polarity must be observed during PCB placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener breakdown return path | Connected to lower-potential node in regulation circuit; carries full load current during reverse bias |
| Cathode | Zener breakdown terminal / Reference voltage output node | Marked with color band; supplies stabilized voltage referenced to anode; connects to feedback divider or error amplifier input |
Key Features
| Feature | Design Value |
|---|---|
| Stable Zener voltage with tight 5% tolerance | Ensures predictable regulation setpoint across production lots without post-assembly trimming |
| Low dynamic impedance (15 Ω) | Minimizes output voltage variation under changing load current, improving line and load regulation |
| Hermetically sealed DO-41 glass package | Provides long-term reliability in humid or chemically aggressive environments versus plastic packages |
| High-temperature operation up to +200°C | Supports deployment in under-hood automotive modules and industrial motor drive control sections |
| Low leakage current (≤0.5 μA) | Reduces error contribution in precision voltage references and high-resistance divider networks |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Zener reference providing precise 16 V threshold to TL431-like shunt regulator or error amplifier input. Use Value: Maintains ±1% output accuracy over temperature and line variations due to stable VZ and low ZZ. |
Use Scenario: Clamping transient surges on 12 V rail in automotive body control modules. IC Role / Device Role / Timing Role: Passive crowbar element absorbing energy above 16 V to protect downstream logic ICs and sensors. Use Value: Responds within nanoseconds to overvoltage events while surviving repeated 1 W pulses per JEDEC stress limits. |
| Industrial Sensor Excitation Reference | Programmable Logic Controller Input Conditioning |
Use Scenario: Providing stable excitation voltage to resistive temperature detectors (RTDs) in process control transmitters. IC Role / Device Role / Timing Role: Low-drift voltage reference source for constant-current generation in 4–20 mA loop circuits. Use Value: Enables <0.1% measurement error over –40°C to +85°C ambient due to low tempco and leakage. |
Use Scenario: Level-shifting and clamping 24 V digital inputs to 5 V microcontroller GPIO pins. IC Role / Device Role / Timing Role: Input protection diode limiting voltage to safe logic thresholds while sinking surge current. Use Value: Prevents latch-up and ESD damage with guaranteed 0.5 μA leakage ensuring clean signal detection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4742A | 12 V nominal, 1 W, DO-41, ±5% - lower voltage, identical power and package | Not suitable for 16 V regulation; requires redesign of feedback divider or clamp threshold | Select only when system requires 12 V reference and board layout allows same footprint |
| BZX85C15 | 15 V nominal, ±5%, 15 Ω ZZ, DO-41 - 1 V lower VZ, otherwise identical test conditions and construction | Delivers 15 V regulation instead of 16 V; may require minor resistor value adjustment in feedback network | Preferred where tighter voltage margin or legacy design reuse favors 15 V nominal point |
Compared with BZX85C16_T50R, 1N4742A serves different voltage classes and requires circuit re-optimization, while BZX85C15 offers near-identical performance at 15 V with minimal design impact-making it the closest functional alternative within the same family.
Availability
BZX85C16_T50R is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, industrial sensor excitation, and PLC input conditioning requiring stable component supply and long-lifecycle support.
Supply support for BZX85C16_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
onsemi (formerly ON Semiconductor) is a global semiconductor manufacturer specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
BZX85C16_T50R belongs to the BZX85C series of general-purpose Zener diodes designed for cost-sensitive, high-reliability voltage regulation and reference applications in consumer, industrial, and automotive electronics.
FAQ
What is the exact zener voltage range for BZX85C16_T50R?
The BZX85C16_T50R has a guaranteed zener voltage range of 15.3 V to 17.1 V when tested at IZ = 15 mA and TL = 30°C ±1°C, per the onsemi datasheet Rev. 2 (October 2017). This 5% tolerance window reflects production binning and ensures consistent regulation performance across units without calibration.
Does BZX85C16_T50R have a specified forward voltage?
Yes, BZX85C16_T50R specifies a maximum forward voltage of 1.2 V at IF = 200 mA, confirming its suitability for bidirectional protection or dual-role applications where forward conduction may occur. This parameter is measured under pulsed DC conditions and supports use in clamp configurations with reverse-biased operation.
Can BZX85C16_T50R be used in surface-mount designs?
No, BZX85C16_T50R uses a DO-41 axial glass package intended for through-hole mounting. It lacks SMD-compatible terminations or tape-and-reel packaging. For surface-mount equivalents, consider SOD-123 or SOD-323 packaged Zeners such as MMBZ5245B (16 V), but note differences in power rating and thermal behavior versus the 1.0 W BZX85C16_T50R.
What is the thermal derating behavior of BZX85C16_T50R above 50°C?
BZX85C16_T50R derates linearly at 6.67 mW/°C above 50°C ambient, reducing maximum allowable power dissipation from 1.0 W at 25°C to zero at approximately 200°C junction temperature. This slope is defined in the Absolute Maximum Ratings table and applies to both ambient- and lead-temperature-based thermal models per JEDEC standards.
How is the cathode identified on BZX85C16_T50R?
The cathode of BZX85C16_T50R is marked by a single color band on the glass body of the DO-41 package. This band must be oriented toward the higher-potential node in reverse-bias applications. The anode is the unmarked end, and correct polarity is essential to achieve zener breakdown rather than forward conduction.
BZX85C16_T50R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 16 V
- Tolerance:
- ±6%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 11 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-41
BZX85C16_T50R FAQ
1.How can I place an order for BZX85C16_T50R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX85C16_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 BZX85C16_T50R reliable?
The price and inventory of BZX85C16_T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX85C16_T50R is usually 5 days.
3.What payment methods are accepted for BZX85C16_T50R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX85C16_T50R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX85C16_T50R?
BZX85C16_T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX85C16_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 BZX85C16_T50R?
For technical support, including BZX85C16_T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX85C16_T50R requirements.
6.How does Aetrix verify that BZX85C16_T50R is sourced from the original manufacturer or authorized distributors?
All BZX85C16_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 BZX85C16_T50R meets industry standards.
7.What is the process for return or replacement of BZX85C16_T50R?
All BZX85C16_T50R units undergo pre-shipment inspection (PSI). If there is an issue with BZX85C16_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 BZX85C16_T50R part is unused and in its original packaging.
Return procedure for BZX85C16_T50R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX85C16_T50R Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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