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onsemi BZX85C5V1TR5K
- Part No.:
- BZX85C5V1TR5K
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZX85C5V1TR5K.pdf
- Description:
- DIODE ZENER 5.1V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:210,000
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Product details
Overview
BZX85C5V1TR5K from onsemi is a 5.1 V, ±5% tolerance, 1.0 W axial-leaded Zener diode in DO-41 glass package, designed for voltage regulation and reference applications in power supplies, overvoltage protection circuits, and analog signal conditioning where stable breakdown voltage and low dynamic impedance are required.
For engineers reviewing the BZX85C5V1TR5K datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage (4.8–5.4 V), zener impedance (45 Ω @ 5 mA), leakage current (1 μA max @ 1 V), power dissipation (1.0 W @ 25°C), and DO-41 mechanical compatibility with standard through-hole PCB layouts.
Technical Context
The BZX85C5V1TR5K operates as a silicon planar Zener diode with controlled reverse-biased avalanche breakdown at nominal 5.1 V. Its thermal equilibrium measurement condition (TL = 30°C ±1°C, 3/8″ lead length) ensures repeatable VZ specification across production lots.
It features a 5% voltage tolerance, 45 Ω dynamic impedance at IZ = 5 mA, and 1 μA maximum leakage current at VR = 1 V. The device supports continuous operation from –65°C to +200°C and derates linearly above 50°C at 6.67 mW/°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.8–5.4 V at IZ = 5 mA - defines regulated output voltage range under nominal bias |
| Tolerance | ±5% - specifies allowable deviation from nominal 5.1 V for precision reference use |
| Zener Impedance (ZZ) | 45 Ω @ IZ = 5 mA - determines regulation stiffness and output voltage variation under load changes |
| Power Dissipation (PD) | 1.0 W @ TA = 25°C - sets maximum continuous DC power handling without heatsinking |
| Leakage Current (IR) | 1 μA max @ VR = 1 V - ensures minimal error current in high-impedance reference nodes |
| Operating Temperature | –65°C to +200°C - enables deployment in automotive under-hood, industrial, and aerospace environments |
| Forward Voltage (VF) | 1.2 V max @ IF = 200 mA - confirms usable forward conduction for dual-direction clamping or polarity detection |
Pinout & Package
DO-41 glass axial package with cathode indicated by color band; leads are non-polarized but functionally asymmetric - anode and cathode terminals defined by physical orientation and marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Forward conduction terminal / Zener cathode reference ground | Connected to lower potential side in reverse-bias regulation; used as return path in shunt regulator topologies |
| Cathode (banded end) | Zener breakdown terminal / voltage reference node | Connected to regulated output node; maintains stable voltage relative to anode when reverse biased above VZ |
Key Features
| Feature | Design Value |
|---|---|
| Stable Zener voltage with tight 5% tolerance | Enables accurate voltage references without post-calibration in cost-sensitive designs |
| Low dynamic impedance (45 Ω @ 5 mA) | Minimizes output voltage shift under varying load currents in shunt regulator configurations |
| DO-41 glass package with JEDEC-compliant dimensions | Ensures mechanical compatibility with legacy through-hole assembly processes and automated insertion equipment |
| Wide operating temperature range (–65°C to +200°C) | Supports reliability-critical applications including engine control units and downhole instrumentation |
| Controlled thermal measurement condition (TL = 30°C ±1°C) | Guarantees consistent VZ specification across manufacturing sites and test labs |
Applications
| Automotive Power Supply Regulation | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Regulating 5 V rail for microcontroller peripherals in engine control modules exposed to wide ambient temperatures. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable bias point for ADC references and op-amp feedback networks. Use Value: Maintains <50 mV output deviation across –40°C to +125°C ambient due to low tempco and DO-41 thermal mass. |
Use Scenario: Clamping and scaling analog sensor outputs (e.g., pressure transducers) before feeding into 12-bit SAR ADCs. IC Role / Device Role / Timing Role: Precision voltage limiter establishing upper bound for ratiometric signal chains. Use Value: 45 Ω ZZ limits signal distortion to <0.5% FS under 100 µA source/sink variations. |
| Consumer AC-DC Adapter Feedback | Telecom Line Interface Protection |
Use Scenario: Secondary-side voltage sensing in isolated flyback converters using optocoupler feedback loops. IC Role / Device Role / Timing Role: Zener reference for TL431-like comparator input, setting precise output voltage threshold. Use Value: ±5% VZ tolerance allows direct replacement of TL431 in low-cost adapters without resistor recalibration. |
Use Scenario: Overvoltage protection on RS-485 receiver inputs subjected to induced surges on long cable runs. IC Role / Device Role / Timing Role: Bidirectional transient clamp (with series diode) limiting common-mode voltage to safe levels. Use Value: 1.2 V forward drop enables low-threshold positive clamping while 5.1 V reverse breakdown protects against >6 V transients. |
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; higher ZZ (17 Ω typical vs. 45 Ω) and tighter VZ distribution (±1% binning available) | Preferred where lower dynamic impedance is critical, e.g., high-frequency ripple suppression | Select 1N4733A if tighter VZ distribution or lower ZZ is needed; verify thermal layout matches DO-41 footprint |
| BZX55C5V1 | Same 5.1 V, ±5%, DO-35 package (smaller glass body); lower PD = 500 mW; ZZ = 60 Ω @ 5 mA | Suitable for space-constrained PCBs where 0.5 W dissipation suffices | Choose BZX55C5V1 only for low-power signal-level references; not interchangeable in 1 W power regulation roles |
Compared with BZX85C5V1TR5K, the 1N4733A offers lower dynamic impedance but requires verification of tighter VZ binning availability, while the BZX55C5V1 reduces board area at the cost of 50% power rating and higher impedance-making it unsuitable for primary shunt regulation.
Availability
BZX85C5V1TR5K is available at Aetrix Electronics and suitable for automotive power supply regulation, industrial sensor signal conditioning, and consumer AC-DC adapter feedback requiring stable component supply and long-term manufacturability.
Supply support for BZX85C5V1TR5K 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 supplier specializing in energy-efficient power management, analog, sensors, and connectivity solutions for automotive, industrial, cloud, and IoT applications.
The BZX85C5V1TR5K belongs to the BZX85C series of general-purpose Zener diodes engineered for robust voltage reference and regulation in cost-sensitive, high-reliability through-hole designs across automotive and industrial markets.
FAQ
What is the nominal Zener voltage and tolerance of the BZX85C5V1TR5K?
The BZX85C5V1TR5K has a nominal Zener voltage of 5.1 V with a tolerance of ±5%, meaning its actual breakdown voltage falls between 4.8 V and 5.4 V when measured at IZ = 5 mA and thermal equilibrium conditions (TL = 30°C ±1°C). This tolerance is specified per the onsemi datasheet revision 2 (October 2017) and applies to all units in the BZX85C5V1TR5K production lot.
What is the maximum power dissipation rating for the BZX85C5V1TR5K?
The BZX85C5V1TR5K is rated for 1.0 W maximum power dissipation at ambient temperature (TA) of 25°C. Above 50°C, it derates linearly at 6.67 mW/°C. At lead temperature (TL) of 25°C with 4 mm lead length, the rating increases to 1.3 W. These values are absolute maximum ratings per the official onsemi datasheet and must not be exceeded to ensure reliability.
Does the BZX85C5V1TR5K have a specified forward voltage?
Yes, the BZX85C5V1TR5K has a maximum forward voltage (VF) of 1.2 V at forward current (IF) = 200 mA, as documented in the onsemi BZX85C3V3–BZX85C56 datasheet. This parameter confirms usability in bidirectional clamping configurations and validates conduction capability in forward-biased protection schemes.
What package type does the BZX85C5V1TR5K use, and how is polarity marked?
The BZX85C5V1TR5K uses the DO-41 (JEDEC DO-204AL) axial glass package. Polarity is marked by a single color band on the cathode end; the unbanded end is the anode. This marking aligns with industry-standard Zener diode conventions and is verified in the physical dimensions section of the onsemi datasheet.
What is the Zener impedance of the BZX85C5V1TR5K, and at what test condition is it specified?
The BZX85C5V1TR5K has a Zener impedance (ZZ) of 45 Ω, specified at test current IZ = 5 mA and TA = 25°C. This value reflects dynamic resistance near the knee of the reverse breakdown curve and directly impacts regulation accuracy under varying load conditions in shunt regulator applications.
BZX85C5V1TR5K Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 5.1 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 10 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 2 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -65°C ~ 200°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-41
BZX85C5V1TR5K FAQ
1.How can I place an order for BZX85C5V1TR5K through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX85C5V1TR5K 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 BZX85C5V1TR5K reliable?
The price and inventory of BZX85C5V1TR5K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX85C5V1TR5K is usually 5 days.
3.What payment methods are accepted for BZX85C5V1TR5K?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX85C5V1TR5K transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX85C5V1TR5K?
BZX85C5V1TR5K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX85C5V1TR5K 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 BZX85C5V1TR5K?
For technical support, including BZX85C5V1TR5K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX85C5V1TR5K requirements.
6.How does Aetrix verify that BZX85C5V1TR5K is sourced from the original manufacturer or authorized distributors?
All BZX85C5V1TR5K 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 BZX85C5V1TR5K meets industry standards.
7.What is the process for return or replacement of BZX85C5V1TR5K?
All BZX85C5V1TR5K units undergo pre-shipment inspection (PSI). If there is an issue with BZX85C5V1TR5K, 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 BZX85C5V1TR5K part is unused and in its original packaging.
Return procedure for BZX85C5V1TR5K:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX85C5V1TR5K Tags
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MMBZ5240B-7-F
Diodes Incorporated
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Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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