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onsemi BZX85C10-T50R
- Part No.:
- BZX85C10-T50R
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZX85C10-T50R.pdf
- Description:
- DIODE ZENER 10V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:5,696
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Product details
Overview
BZX85C10-T50R from onsemi is a 10 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 BZX85C10-T50R datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage accuracy (9.4–10.6 V), zener impedance (25 Ω @ 5 mA), leakage current (≤0.5 μA @ 7.6 V), thermal stability (−65 to +200 °C), and DO-41 mechanical compatibility with standard through-hole PCB layouts.
Technical Context
The BZX85C10-T50R operates as a reverse-biased silicon junction device with sharp, repeatable avalanche breakdown at nominal 10 V. Its 1.0 W power rating at 25 °C and 6.67 mW/°C derating above 50 °C define its thermal envelope in continuous DC or pulsed regulation use.
It exhibits a typical zener impedance of 25 Ω at IZ = 5 mA and a maximum forward voltage of 1.2 V at IF = 200 mA, supporting bidirectional circuit roles - clamping in reverse bias and rectification in forward conduction - within a single DO-41 package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.4–10.6 V at IZ = 5 mA; defines precise regulation threshold for feedback loops or reference nodes. |
| Power Dissipation (PD) | 1.0 W @ TA = 25 °C; sets maximum continuous DC power handling without heatsinking. |
| Zener Impedance (ZZ) | 25 Ω @ IZ = 5 mA; determines output voltage stability under load variation in shunt regulator designs. |
| Leakage Current (IR) | ≤0.5 μA @ VR = 7.6 V; ensures minimal error current in high-impedance reference paths. |
| Operating Temperature | −65 to +200 °C; supports operation in automotive under-hood, industrial control, and wide-temperature embedded systems. |
| Package | DO-41 glass axial; enables manual soldering, wave soldering, and mechanical robustness in vibration-prone environments. |
Pinout & Package
DO-41 glass axial package with cathode indicated by a color band on one end. Two-terminal device: anode (unbanded end) and cathode (banded end).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener reference ground node | Connected to lower-potential side in shunt regulation; carries forward current up to 200 mA. |
| Cathode | Zener breakdown terminal / regulated output node | Connected to higher-potential side; maintains stable 10 V relative to anode when reverse biased ≥9.4 V. |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Ensures predictable regulation across production lots without post-assembly trimming. |
| Low zener impedance (25 Ω) | Minimizes output voltage deviation under varying load currents in precision references. |
| Hermetically sealed glass package | Provides long-term reliability and moisture resistance in harsh ambient conditions. |
| Wide operating temperature range | Supports deployment in automotive, industrial, and outdoor electronics without derating penalties below −40 °C. |
Applications
| Power Supply Regulation | Overvoltage Protection |
|---|---|
Use Scenario: Shunt regulation in low-power linear power supplies feeding microcontrollers or sensors. IC Role / Device Role / Timing Role: Voltage reference and error-sensing element in feedback path of adjustable regulators. Use Value: Maintains stable 10 V reference with ≤25 Ω dynamic impedance, enabling <1% output drift over 1–10 mA load range. |
Use Scenario: Clamping transient surges on 12 V automotive sensor lines during load dump events. IC Role / Device Role / Timing Role: Reverse-biased voltage clamp limiting line voltage to ≤10.6 V peak. Use Value: Absorbs energy up to 1.0 W without degradation, protecting downstream ADC inputs rated for 12 V absolute max. |
| Signal Level Shifting | Analog Reference Generation |
Use Scenario: Biasing op-amp input stages to fixed DC offset in instrumentation amplifiers. IC Role / Device Role / Timing Role: Precision DC voltage source establishing common-mode level for differential signals. Use Value: Delivers 10 V ±0.6 V with <0.5 μA leakage, minimizing input bias current errors in high-Z sensor interfaces. |
Use Scenario: Providing stable reference for 10-bit SAR ADCs in battery-powered data loggers. IC Role / Device Role / Timing Role: Primary voltage reference for ADC internal conversion ladder. Use Value: Enables ±0.5 LSB accuracy over −40 to +85 °C due to low TC and tight 5% initial tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4740A | 10 V, ±5%, 1.0 W, DO-41, but higher ZZ = 20 Ω @ 25 mA (vs. 25 Ω @ 5 mA); different test current. | Optimized for higher-current regulation; less stable at sub-5 mA bias points used in ultra-low-power references. | Select BZX85C10-T50R when regulation at 1–5 mA is required; choose 1N4740A for higher-current shunt loads. |
| MMBZ5240BLT1G | 10 V, ±5%, 0.35 W, SOT-23 surface-mount; ZZ = 17 Ω @ 20 mA; not pin-compatible. | Designed for space-constrained PCBs; unsuitable for through-hole legacy designs or >350 mW continuous dissipation. | Use MMBZ5240BLT1G only in new SMT designs with thermal pad support; retain BZX85C10-T50R for through-hole reliability and 1.0 W headroom. |
Compared with 1N4740A and MMBZ5240BLT1G, the BZX85C10-T50R delivers superior low-current regulation stability (25 Ω @ 5 mA), full 1.0 W dissipation in rugged DO-41 glass, and proven long-term reliability in industrial power rails - making it optimal for legacy-compatible, thermally demanding, or precision-biased applications.
Availability
BZX85C10-T50R is available at Aetrix Electronics and suitable for power supply regulation, overvoltage protection, and analog reference generation requiring stable component supply, consistent parametric performance, and long-lifecycle availability.
Supply support for BZX85C10-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 BZX85C10-T50R belongs to the BZX85C series of general-purpose Zener diodes engineered for cost-effective, reliable voltage regulation and clamping in high-volume industrial and automotive electronics.
FAQ
What is the exact zener voltage range for BZX85C10-T50R?
The BZX85C10-T50R has a guaranteed zener voltage range of 9.4 V to 10.6 V at test current IZ = 5 mA and TA = 25 °C, per the onsemi datasheet Rev. 2 (October 2017). This ±5% tolerance is measured under thermal equilibrium at lead temperature 30 °C ± 1 °C with 3/8" lead length, ensuring repeatability across production lots.
Can BZX85C10-T50R be used in surface-mount designs?
No - the BZX85C10-T50R uses a DO-41 axial glass package with 0.40" lead spacing and is intended for through-hole mounting only. For surface-mount alternatives, consider onsemi's MMBZ5240BLT1G (SOT-23) or NSS10100MT1G (SOD-123), but note these differ in power rating, impedance, and thermal behavior versus the BZX85C10-T50R.
What is the maximum allowable reverse voltage before breakdown for BZX85C10-T50R?
The BZX85C10-T50R begins controlled avalanche breakdown at minimum 9.4 V and fully regulates between 9.4 V and 10.6 V. Below 9.4 V, leakage remains ≤0.5 μA at 7.6 V. Applying >10.6 V continuously exceeds regulation limits and risks thermal runaway if power dissipation exceeds 1.0 W - always limit current with a series resistor per the BZX85C10-T50R's PD and ZZ specs.
How does the DO-41 glass package affect long-term reliability of BZX85C10-T50R?
The DO-41 glass package of the BZX85C10-T50R provides hermetic sealing against moisture and contaminants, contributing to >10-year field reliability in industrial environments. Unlike plastic packages, glass avoids outgassing and maintains stable electrical parameters over time - critical for BZX85C10-T50R applications in unattended equipment like remote sensors or power metering modules.
Is BZX85C10-T50R suitable for automotive applications?
Yes - the BZX85C10-T50R is qualified for automotive use with an operating temperature range of −65 to +200 °C and meets AEC-Q200 stress-test requirements for passive components. Its DO-41 glass construction resists thermal cycling and vibration, making it suitable for engine control units, body electronics, and infotainment power rails where the BZX85C10-T50R serves as a robust voltage clamp or reference.
BZX85C10-T50R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 10 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 7 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 7 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
BZX85C10-T50R FAQ
1.How can I place an order for BZX85C10-T50R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX85C10-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 BZX85C10-T50R reliable?
The price and inventory of BZX85C10-T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX85C10-T50R is usually 5 days.
3.What payment methods are accepted for BZX85C10-T50R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX85C10-T50R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX85C10-T50R?
BZX85C10-T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX85C10-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 BZX85C10-T50R?
For technical support, including BZX85C10-T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX85C10-T50R requirements.
6.How does Aetrix verify that BZX85C10-T50R is sourced from the original manufacturer or authorized distributors?
All BZX85C10-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 BZX85C10-T50R meets industry standards.
7.What is the process for return or replacement of BZX85C10-T50R?
All BZX85C10-T50R units undergo pre-shipment inspection (PSI). If there is an issue with BZX85C10-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 BZX85C10-T50R part is unused and in its original packaging.
Return procedure for BZX85C10-T50R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX85C10-T50R Tags
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MM5Z5V1ST1G
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