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onsemi BZX85C13_T50R
- Part No.:
- BZX85C13_T50R
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZX85C13_T50R.pdf
- Description:
- DIODE ZENER 13V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:7,393
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Product details
Overview
BZX85C13_T50R from onsemi is a 13 V, ±5% tolerance, 1.0 W axial-leaded Zener diode in DO-41 glass package, designed for voltage regulation and reference applications in power supply feedback loops, overvoltage protection circuits, and precision biasing networks where stable breakdown voltage and low dynamic impedance are required.
For engineers reviewing the BZX85C13_T50R datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage (12.4–14.1 V), zener impedance (20 Ω @ 5 mA), leakage current (0.5 μA max @ 10.5 V), power dissipation (1.0 W @ 25°C), and DO-41 package compatibility with through-hole PCB assembly.
Technical Context
This device operates as a reverse-biased silicon junction diode with controlled avalanche breakdown at nominal 13 V. Its thermal equilibrium zener voltage measurement condition (TL = 30°C ±1°C, 3/8″ lead length) ensures repeatable calibration across production lots.
The BZX85C13_T50R exhibits a typical zener impedance of 20 Ω at 5 mA test current and 500 Ω at 1 mA knee current, supporting stable regulation under varying load conditions. It maintains operation across –65°C to +200°C junction temperature range with 6.67 mW/°C derating above 50°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 12.4–14.1 V at IZ = 5 mA - defines regulated output voltage window under standard test conditions |
| Tolerance | ±5% - specifies maximum allowable deviation from nominal 13 V rating for production binning |
| Power Dissipation (PD) | 1.0 W @ TA = 25°C - sets maximum continuous power handling without heatsinking |
| Zener Impedance (ZZ) | 20 Ω @ IZ = 5 mA - determines output voltage stability under load current variation |
| Leakage Current (IR) | 0.5 μA max @ VR = 10.5 V - ensures minimal error current in high-impedance reference paths |
| Operating Temperature | –65°C to +200°C - supports deployment in automotive under-hood, industrial, and aerospace environments |
Pinout & Package
DO-41 glass axial package with cathode indicated by color band; two-terminal device with anode and cathode leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground node | Connected to circuit ground or lower-potential node in shunt regulation configuration |
| Cathode | Zener breakdown terminal / regulated voltage output node | Connected to input voltage source; delivers stable 13 V reference when reverse biased |
Key Features
| Feature | Design Value |
|---|---|
| Stable Zener voltage calibration | Measured at thermal equilibrium (TL = 30°C ±1°C) for consistent performance across manufacturing batches |
| Low dynamic impedance | 20 Ω @ 5 mA enables tight regulation in feedback loops with <1% line/load regulation error |
| High-temperature operation | Junction range up to +200°C supports use in engine control units and industrial motor drives |
| Hermetically sealed glass package | DO-41 construction provides moisture resistance and long-term parameter stability vs. plastic packages |
Applications
| Power Supply Regulation | Overvoltage Protection |
|---|---|
Use Scenario: Shunt regulator in low-power AC/DC adapter feedback path. IC Role / Device Role / Timing Role: Zener reference element setting TL431 or optocoupler bias point. Use Value: Maintains ±1% output voltage accuracy despite input ripple and load transients due to 20 Ω ZZ. |
Use Scenario: Clamping circuit protecting microcontroller I/O pins from ESD or surge events. IC Role / Device Role / Timing Role: Voltage-limiting shunt element diverting excess energy to ground. Use Value: Responds within nanoseconds to transient overvoltage with 0.5 μA leakage ensuring no signal degradation during normal operation. |
| Precision Biasing | Industrial Sensor Excitation |
Use Scenario: Reference voltage source for op-amp based current-sense amplifier. IC Role / Device Role / Timing Role: Stable DC reference replacing higher-cost voltage references in cost-sensitive designs. Use Value: Delivers 13 V ±5% with <50 ppm/°C tempco over –40°C to +85°C, enabling 12-bit ADC accuracy. |
Use Scenario: Excitation voltage for resistive temperature detector (RTD) bridge circuits. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage source powering Wheatstone bridge arms. Use Value: 0.5 μA max leakage prevents bridge imbalance errors; DO-41 package allows direct mounting near sensor for thermal tracking. |
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, ±5%, 1.0 W, DO-41 - lower VZ, 22 Ω ZZ @ 21 mA | Requires recalibration of feedback divider; better suited for 12 V systems | Select when system target voltage is 12 V and higher test current (21 mA) is acceptable |
| BZX55C13 | 13 V nominal, ±5%, 500 mW, DO-35 - same VZ but 50% lower power rating | Not suitable for >0.5 W dissipation; limited thermal margin in compact layouts | Choose only for space-constrained boards where 0.5 W max power suffices and DO-35 footprint is preferred |
Compared with BZX85C13_T50R, the 1N4742A offers tighter impedance at higher current but shifts regulation setpoint downward, while the BZX55C13 matches voltage but sacrifices thermal headroom-making BZX85C13_T50R optimal for 13 V, 1 W, DO-41-requiring designs.
Availability
BZX85C13_T50R is available at Aetrix Electronics and suitable for power supply regulation, overvoltage protection, and precision biasing applications requiring stable component supply, long-lifecycle support, and JEDEC-standard DO-41 packaging.
Supply support for BZX85C13_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 supplier specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The BZX85 series belongs to onsemi's general-purpose Zener diode product line, engineered for reliable voltage reference and regulation in cost-sensitive, high-volume applications across industrial controls and power conversion systems.
FAQ
What is the nominal zener voltage and tolerance of BZX85C13_T50R?
The BZX85C13_T50R has a nominal zener voltage of 13 V with a tolerance of ±5%, meaning its actual breakdown voltage falls between 12.4 V and 14.1 V when tested at 5 mA under thermal equilibrium conditions (TL = 30°C ±1°C). This specification is confirmed in the official onsemi datasheet revision 2 (October 2017) and applies directly to the BZX85C13_T50R device marking and binning.
What package type does BZX85C13_T50R use, and how is polarity identified?
The BZX85C13_T50R uses the DO-41 axial glass package per JEDEC DO-204AL standard. Polarity is identified by a single color band on the cathode end of the glass body; the unmarked end is the anode. This marking convention is standardized across the BZX85C series and verified in the onsemi physical dimensions document (drawing DO41AREV2).
What is the maximum power dissipation and thermal derating behavior of BZX85C13_T50R?
The BZX85C13_T50R has a maximum power dissipation of 1.0 W at ambient temperature (TA) of 25°C. Above 50°C, it must be derated at 6.67 mW/°C, reducing usable power linearly-for example, to 0.67 W at 75°C. This derating curve is defined in the Absolute Maximum Ratings table and reflects safe junction temperature limits up to +200°C.
How does the zener impedance of BZX85C13_T50R affect its regulation performance?
The BZX85C13_T50R exhibits a zener impedance (ZZ) of 20 Ω at 5 mA test current, which directly determines output voltage variation under changing load conditions. A lower ZZ yields tighter regulation-e.g., a 10 mA load shift causes only ~200 mV drift. This value is measured per onsemi's standardized thermal equilibrium method and is critical for feedback loop stability in power supplies using BZX85C13_T50R.
Is BZX85C13_T50R suitable for high-temperature industrial environments?
Yes, the BZX85C13_T50R is rated for junction and storage temperatures from –65°C to +200°C, making it suitable for under-hood automotive, motor drive, and industrial control applications. Its hermetically sealed DO-41 glass package enhances long-term reliability in humid or thermally cycling environments-confirmed by onsemi's qualification testing and lifetime data for the BZX85 series.
BZX85C13_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):
- 13 V
- Tolerance:
- ±6%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 10 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 9.1 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
BZX85C13_T50R FAQ
1.How can I place an order for BZX85C13_T50R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX85C13_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 BZX85C13_T50R reliable?
The price and inventory of BZX85C13_T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX85C13_T50R is usually 5 days.
3.What payment methods are accepted for BZX85C13_T50R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX85C13_T50R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX85C13_T50R?
BZX85C13_T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX85C13_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 BZX85C13_T50R?
For technical support, including BZX85C13_T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX85C13_T50R requirements.
6.How does Aetrix verify that BZX85C13_T50R is sourced from the original manufacturer or authorized distributors?
All BZX85C13_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 BZX85C13_T50R meets industry standards.
7.What is the process for return or replacement of BZX85C13_T50R?
All BZX85C13_T50R units undergo pre-shipment inspection (PSI). If there is an issue with BZX85C13_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 BZX85C13_T50R part is unused and in its original packaging.
Return procedure for BZX85C13_T50R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX85C13_T50R Tags
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MMBZ5240B-7-F
Diodes Incorporated
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Diodes Incorporated
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onsemi
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