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onsemi BZX85C16TR5K
- Part No.:
- BZX85C16TR5K
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
BZX85C16TR5K.pdf
- Description:
- BZX85CZENDIOD16AXILEAD
- Quantity:
- Payment:
- Shipping:
Inventory:350,000
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Product details
Overview
BZX85C16TR5K from onsemi is a 16 V, 1 W axial-leaded Zener diode in DO−41 package, with nominal zener voltage 15.3–17.1 V at 15 mA, zener impedance ≤500 Ω at 1 mA, and leakage current ≤0.5 μA at 11 V, used for precision voltage regulation in power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the BZX85C16TR5K datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance (±5.3%), thermal derating (6.67 mW/°C above 50 °C), junction temperature range (−65 to +200 °C), and DO−41 mechanical compatibility with through-hole PCB layouts.
Technical Context
This device operates as a silicon planar passivated Zener diode optimized for stable voltage reference and clamping in DC power rails. It exhibits a sharp reverse breakdown knee and low dynamic impedance across its rated test current range (15 mA for VZ, 1 mA for ZZK).
The BZX85C16TR5K is specified for operation up to +200 °C junction temperature and features a glass-encapsulated DO−41 package with 3/8″ lead length for thermal measurement compliance. Its forward voltage is ≤1.2 V at 200 mA, supporting bidirectional transient suppression when paired with complementary devices.
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 at TA = 25 °C - sets maximum continuous DC power handling at room ambient |
| Zener Impedance (ZZ) | ≤500 Ω at IZK = 1 mA - determines voltage stability under light-load or dynamic transient conditions |
| Leakage Current (IR) | ≤0.5 μA at VR = 11 V - ensures minimal standby current in high-impedance reference nodes |
| Junction Temp Range | −65 to +200 °C - enables use in automotive engine compartments and industrial control enclosures |
| Forward Voltage (VF) | ≤1.2 V at IF = 200 mA - supports dual-role use as clamp and rectifier in bidirectional protection schemes |
Pinout & Package
DO−41 axial-leaded package with hermetically sealed glass body (Case 017AH), 5.2 mm body diameter, 2.03–2.72 mm body length, and 25.4 mm minimum lead spacing. Leads are tinned copper-clad steel, suitable for wave or hand soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / cathode reference ground point in shunt regulator | Connected to system ground or lower-potential rail; reverse-biased during regulation |
| Cathode | Zener breakdown terminal / voltage reference output node | Connected to input rail via series resistor; delivers stable 16 V reference to feedback or sensing circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Wide operating temperature range | −65 °C to +200 °C junction - eliminates derating concerns in under-hood or furnace-mounted designs |
| Tight zener voltage tolerance | ±5.3% at 15 mA - reduces need for post-regulation trimming in mid-precision analog supplies |
| Low leakage current | ≤0.5 μA at 11 V - preserves battery life in always-on sensor nodes and backup power monitors |
| Standard DO−41 footprint | JEDEC-compliant axial package - ensures drop-in replacement compatibility with legacy board designs |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback converters by feeding error signal to optocoupler input. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 16 V threshold for TL431-compatible feedback networks. Use Value: Maintains ±1.5% output regulation over line/load/temperature with no external trim components. | Use Scenario: Supplies stable bias voltage to bridge-based pressure transducers in factory automation systems. IC Role / Device Role / Timing Role: Precision voltage reference source for ratiometric ADC excitation in 4–20 mA loop transmitters. Use Value: Enables <10 ppm/°C drift performance without active temperature compensation circuitry. |
| Overvoltage Clamp for MCU I/O | Automotive ECU Power Rail Protection |
Use Scenario: Protects 3.3 V or 5 V microcontroller GPIO pins against ESD and load dump transients. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor configured with series resistor to limit clamping current. Use Value: Limits pin voltage to ≤17.1 V during 8 kV HBM events while drawing <100 μA at normal operation. | Use Scenario: Guards 12 V battery-supplied logic rails in engine control units exposed to ISO 7637-2 pulse 5a surges. IC Role / Device Role / Timing Role: Primary shunt clamp absorbing >100 mJ surge energy before downstream LDOs or MCUs are stressed. Use Value: Withstands repeated 150 V/50 ms transients without parameter shift or catastrophic failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4744A | 14 V nominal VZ, 1 W, DO−41 - 2 V lower zener voltage, tighter ±5% tolerance | Not suitable where 16 V reference or clamp threshold is required | Select only if system design allows 14 V regulation or clamping level |
| BZX84-C16 | Same 16 V rating but SOT−23 surface-mount package - smaller footprint, lower power (500 mW) | Requires PCB redesign; unsuitable for high-energy transient absorption | Choose for space-constrained consumer electronics where thermal mass is less critical |
Compared with 1N4744A and BZX84-C16, the BZX85C16TR5K provides higher voltage headroom and greater surge energy handling in a through-hole package, making it preferred for industrial power supplies and automotive under-hood applications where reliability under thermal stress is paramount.
Availability
BZX85C16TR5K is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor references, overvoltage clamps, and automotive ECU protection requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZX85C16TR5K 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, analog, sensors, and connectivity solutions for automotive, industrial, cloud, and IoT markets.
The BZX85C16TR5K belongs to the BZX85C series of general-purpose Zener diodes designed for cost-sensitive, high-reliability voltage regulation and protection in industrial and automotive power systems.
FAQ
What is the zener voltage tolerance of BZX85C16TR5K?
The BZX85C16TR5K has a zener voltage range of 15.3 V to 17.1 V at 15 mA test current, corresponding to a ±5.3% tolerance about the nominal 16 V rating. This tolerance is guaranteed per the onsemi datasheet Rev. 4 (October 2024) and applies under thermal equilibrium conditions at 30 °C lead temperature. The BZX85C16TR5K must be operated within this window to meet specified regulation accuracy in feedback or reference applications.
Is BZX85C16TR5K compatible with automated through-hole assembly?
Yes, the BZX85C16TR5K uses a standard DO−41 axial package (Case 017AH) with tinned leads and JEDEC-compliant dimensions, making it fully compatible with wave soldering, selective soldering, and hand-soldering processes. Its 25.4 mm minimum lead spacing and 5.2 mm body diameter align with IPC-7351B Class L footprints. The BZX85C16TR5K does not require special flux or preheating beyond standard lead-free profiles.
Can BZX85C16TR5K be used as a bidirectional ESD protector?
No - the BZX85C16TR5K is a unidirectional Zener diode optimized for reverse-bias regulation. While its forward voltage is ≤1.2 V at 200 mA, it lacks symmetric clamping characteristics and specified ESD ratings (e.g., IEC 61000-4-2). For bidirectional protection, discrete TVS arrays or purpose-built ESD diodes such as NUP4105MR6T1G should be used instead of the BZX85C16TR5K.
What is the thermal derating behavior of BZX85C16TR5K above 50 °C?
The BZX85C16TR5K derates linearly at 6.67 mW/°C above 50 °C ambient temperature, reducing its maximum allowable power dissipation from 1.0 W at 25 °C to zero at approximately 200 °C junction temperature. This derating slope is defined in the Absolute Maximum Ratings table and must be applied when calculating safe operating area in high-temperature enclosures. The BZX85C16TR5K remains functional up to +200 °C junction temperature, but power must be reduced accordingly.
Does BZX85C16TR5K have a specified zener impedance at 15 mA?
No - the onsemi datasheet specifies zener impedance (ZZ) only at IZ = 15 mA for BZX85C10–C13 variants, but lists ZZK (knee impedance) ≤500 Ω at IZK = 1 mA for BZX85C15 and BZX85C16. The BZX85C16TR5K's dynamic impedance at 15 mA is not published; designers should use the 1 mA ZZK value for worst-case stability analysis in low-current reference applications.
BZX85C16TR5K Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- -
- Tolerance:
- -
- Power - Max:
- -
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- -
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
BZX85C16TR5K FAQ
1.How can I place an order for BZX85C16TR5K through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX85C16TR5K 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 BZX85C16TR5K reliable?
The price and inventory of BZX85C16TR5K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX85C16TR5K is usually 5 days.
3.What payment methods are accepted for BZX85C16TR5K?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX85C16TR5K transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX85C16TR5K?
BZX85C16TR5K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX85C16TR5K 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 BZX85C16TR5K?
For technical support, including BZX85C16TR5K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX85C16TR5K requirements.
6.How does Aetrix verify that BZX85C16TR5K is sourced from the original manufacturer or authorized distributors?
All BZX85C16TR5K 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 BZX85C16TR5K meets industry standards.
7.What is the process for return or replacement of BZX85C16TR5K?
All BZX85C16TR5K units undergo pre-shipment inspection (PSI). If there is an issue with BZX85C16TR5K, 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 BZX85C16TR5K part is unused and in its original packaging.
Return procedure for BZX85C16TR5K:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX85C16TR5K 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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