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onsemi BZX85C3V6_T50A
- Part No.:
- BZX85C3V6_T50A
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZX85C3V6_T50A.pdf
- Description:
- DIODE ZENER 3.6V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:5,232
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Product details
Overview
BZX85C3V6_T50A from ON Semiconductor is a 3.6 V ±5% tolerance, 1.0 W axial-leaded Zener diode in DO-41 glass package, with 60 Ω zener impedance at 5 mA test current and 1 μA max leakage at 1 V reverse voltage, used for precision voltage regulation and reference in low-power analog circuits.
For engineers reviewing the BZX85C3V6_T50A datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance, power dissipation at elevated ambient temperature, thermal derating slope, cathode identification via band marking, and DO-41 mechanical compatibility with through-hole PCB layouts.
Technical Context
The BZX85C3V6_T50A operates as a silicon planar Zener diode optimized for stable voltage reference under reverse-biased conditions. Its 3.6 V nominal breakdown voltage is specified at 5 mA test current (IZ), with 60 Ω dynamic impedance (ZZ) confirming tight regulation near knee region.
It features a -65°C to +200°C operating and storage temperature range, 6.67 mW/°C thermal derating above 50°C, and 1.3 W power dissipation at lead temperature (TL = 25°C, 4 mm from package), enabling reliable use in industrial and automotive environments where thermal cycling occurs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.4 V min / 3.8 V max at IZ = 5 mA - defines usable regulation window for 3.6 V nominal reference |
| Power Dissipation (PD) | 1.0 W @ TA = 25°C - sets maximum continuous power in free-air ambient |
| Zener Impedance (ZZ) | 60 Ω @ IZ = 5 mA - indicates low AC impedance for stable output under small-signal load variation |
| Leakage Current (IR) | 1 μA max @ VR = 1 V - ensures minimal standby current in high-impedance bias networks |
| Thermal Derating | 6.67 mW/°C above 50°C - requires derated power handling in enclosed or hot environments |
| Package | DO-41 glass case with cathode band - supports manual soldering, wave soldering, and mechanical robustness in vibration-prone assemblies |
Pinout & Package
DO-41 glass axial package with cathode identified by a single color band on the body; anode and cathode terminals are unmarked leads extending from opposite ends of the cylindrical body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower potential side in reverse-bias regulator configuration; carries forward current up to 200 mA (VF ≤ 1.2 V) |
| Cathode | Zener breakdown terminal | Marked with color band; connected to higher potential side in regulation mode; defines reference node voltage relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Ensures predictable regulation across production lots without post-assembly trimming |
| Low 60 Ω dynamic impedance | Maintains <±10 mV output shift under ±1 mA load current change near 5 mA operating point |
| 1.0 W power rating with DO-41 footprint | Provides higher power headroom than standard 400 mW Zeners while retaining legacy board space |
| -65°C to +200°C operating range | Supports deployment in under-hood automotive, industrial motor control, and downhole sensing applications |
| Cathode band marking per JEDEC | Enables unambiguous polarity identification during manual assembly and automated optical inspection |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulators or op-amp reference nodes. IC Role / Device Role / Timing Role: Provides fixed 3.6 V reference against which error amplifier compares output voltage. Use Value: Enables ±1% output regulation accuracy with minimal external components due to tight VZ tolerance and low ZZ. |
Use Scenario: Protecting microcontroller I/O pins from transient overvoltage events. IC Role / Device Role / Timing Role: Shunts excess energy to ground when input exceeds 3.8 V, limiting voltage stress on downstream logic. Use Value: Delivers fast clamping response with 1 μA leakage below threshold, preserving signal integrity in always-on sensor interfaces. |
| Temperature Sensor Bias | ADC Reference Divider |
Use Scenario: Generating stable bias current for silicon bandgap temperature sensors. IC Role / Device Role / Timing Role: Supplies constant current source via series resistor, leveraging stable VZ to minimize drift. Use Value: Achieves <±0.5°C measurement error over -40°C to +125°C due to low thermal coefficient and wide TJ range. |
Use Scenario: Scaling down 5 V system rail to 3.6 V for 12-bit ADC reference input. IC Role / Device Role / Timing Role: Acts as precision shunt element in resistive divider network to set exact reference voltage. Use Value: Reduces full-scale error to <0.2 LSB by eliminating resistor ratio dependency and matching VZ tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4728A | 3.3 V nominal, ±5%, 1.0 W, DO-41 - lower VZ and 20 Ω ZZ at 76 mA | Higher test current shifts knee behavior; less suitable for low-current bias networks | Select when tighter low-current regulation is not required and 3.3 V reference suffices |
| BZX55C3V6 | 3.6 V nominal, ±5%, 500 mW, DO-35 - same VZ but lower PD and 90 Ω ZZ at 5 mA | Reduced power handling limits use in sustained clamp or reference roles above 300 mW | Choose only for space-constrained designs where 500 mW rating meets thermal budget |
Compared with 1N4728A and BZX55C3V6, the BZX85C3V6_T50A delivers superior low-current regulation stability (60 Ω vs. 90–20 Ω at mismatched IZ), higher power margin (1.0 W vs. 500 mW), and DO-41 mechanical robustness-making it optimal for industrial-grade voltage references requiring long-term drift immunity.
Availability
BZX85C3V6_T50A is available at Aetrix Electronics and suitable for industrial power supplies, automotive ECU voltage monitoring, and medical sensor biasing requiring stable component supply with traceable lot history and extended lifecycle support.
Supply support for BZX85C3V6_T50A 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
ON Semiconductor is a global semiconductor manufacturer specializing in energy-efficient power management, analog, and discrete devices for automotive, industrial, and cloud infrastructure markets.
The BZX85C3V6_T50A belongs to the BZX85C series of general-purpose Zener diodes designed for cost-sensitive, high-reliability voltage regulation and protection in mass-produced consumer and industrial electronics.
FAQ
What is the zener voltage tolerance for BZX85C3V6_T50A?
The BZX85C3V6_T50A has a zener voltage tolerance of ±5% at IZ = 5 mA, resulting in a guaranteed breakdown range of 3.4 V to 3.8 V. This tolerance is measured under thermal equilibrium conditions at lead temperature TL = 30°C ± 1°C with 3/8" lead length, ensuring consistency across production batches and supporting precise analog circuit design without calibration.
How does thermal derating affect BZX85C3V6_T50A's power handling?
BZX85C3V6_T50A must be derated at 6.67 mW/°C above 50°C ambient temperature, reducing its usable power from 1.0 W at 25°C to approximately 867 mW at 70°C. This linear derating ensures safe junction temperature operation within the -65°C to +200°C range and is critical for reliability in sealed enclosures or high-temperature PCB locations.
Is BZX85C3V6_T50A suitable for overvoltage protection in 3.3 V logic circuits?
Yes, BZX85C3V6_T50A is suitable for clamping transients on 3.3 V logic lines because its 3.4–3.8 V breakdown range lies safely above the 3.3 V nominal rail while remaining below typical absolute maximum ratings (e.g., 4.0 V for many 3.3 V I/O). Its 1 μA leakage at 1 V ensures negligible loading during normal operation.
What package type does BZX85C3V6_T50A use and how is polarity marked?
BZX85C3V6_T50A uses the DO-41 axial glass package per JEDEC DO-204AL, with cathode polarity indicated by a single color band on the body. The anode and cathode leads extend symmetrically from opposite ends, and the band must be oriented toward the higher-potential node in reverse-bias applications to ensure correct Zener conduction.
Can BZX85C3V6_T50A replace BZX55C3V6 in existing designs?
BZX85C3V6_T50A can serve as a functional upgrade to BZX55C3V6 in most cases due to identical 3.6 V ±5% rating and DO-41 compatibility, but requires verification of thermal layout since its 1.0 W rating demands greater copper area or airflow than the 500 mW BZX55C3V6. No PCB changes are needed if mechanical fit and thermal margin allow.
BZX85C3V6_T50A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 3.6 V
- Tolerance:
- ±6%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 30 µA @ 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
BZX85C3V6_T50A FAQ
1.How can I place an order for BZX85C3V6_T50A through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX85C3V6_T50A 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 BZX85C3V6_T50A reliable?
The price and inventory of BZX85C3V6_T50A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX85C3V6_T50A is usually 5 days.
3.What payment methods are accepted for BZX85C3V6_T50A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX85C3V6_T50A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX85C3V6_T50A?
BZX85C3V6_T50A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX85C3V6_T50A 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 BZX85C3V6_T50A?
For technical support, including BZX85C3V6_T50A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX85C3V6_T50A requirements.
6.How does Aetrix verify that BZX85C3V6_T50A is sourced from the original manufacturer or authorized distributors?
All BZX85C3V6_T50A 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 BZX85C3V6_T50A meets industry standards.
7.What is the process for return or replacement of BZX85C3V6_T50A?
All BZX85C3V6_T50A units undergo pre-shipment inspection (PSI). If there is an issue with BZX85C3V6_T50A, 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 BZX85C3V6_T50A part is unused and in its original packaging.
Return procedure for BZX85C3V6_T50A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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