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onsemi BZX85C5V6
- Part No.:
- BZX85C5V6
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZX85C5V6.pdf
- Description:
- DIODE ZENER 5.6V 1.3W DO41G
- Quantity:
- Payment:
- Shipping:
Inventory:172,888
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Product details
Overview
BZX85C5V6 from Fairchild Semiconductor is a 5.6 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 operating at up to +200°C junction temperature.
For engineers reviewing the BZX85C5V6 datasheet, pinout, applications, or equivalent options, this device offers verified Zener voltage (5.2–6.0 V), low dynamic impedance (45 Ω @ 45 mA), low leakage (<1 μA @ 4.2 V), and thermal stability across -65°C to +200°C - critical for industrial power rail conditioning and analog reference design.
Technical Context
The BZX85C5V6 operates as a silicon planar Zener diode with controlled avalanche breakdown at nominal 5.6 V, optimized for stable DC voltage clamping under reverse bias. Its 1.0 W power rating at 25°C ambient and 6.67 mW/°C derating above 50°C define its thermal envelope in PCB-mounted linear regulator designs.
Electrical behavior is characterized by two key operating points: Zener test current IZ = 45 mA (for VZ measurement) and knee current IZK = 1 mA (for ZZK = 400 Ω), enabling predictable performance in both high-current regulation and low-power reference modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.2 V min to 6.0 V max at IZ = 45 mA - defines regulated output range for feedback networks requiring tight 5.6 V ±5% reference. |
| Power Dissipation (PD) | 1.0 W @ TA = 25°C - supports continuous regulation in compact through-hole power supplies without forced cooling. |
| Zener Impedance (ZZ) | 45 Ω @ IZ = 45 mA - ensures minimal output voltage variation under load changes in voltage reference circuits. |
| Leakage Current (IR) | <1 μA @ VR = 4.2 V - enables low-error biasing in high-impedance analog nodes and battery-powered sensor references. |
| Operating Temperature | -65°C to +200°C - allows deployment in automotive engine control units, industrial motor drives, and downhole instrumentation. |
| Forward Voltage (VF) | 1.2 V max @ IF = 200 mA - confirms standard silicon PN junction conduction for polarity verification and ESD protection roles. |
Pinout & Package
DO-41 glass axial package with cathode indicated by color band; leads are unmarked anode/cathode terminals suitable for manual or wave soldering. Standard JEDEC DO-204AL outline per drawing DO41A.pdf.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Forward conduction terminal / Zener cathode return path | Connected to circuit ground or lower potential node when used in reverse-biased regulation configuration. |
| Cathode (banded end) | Zener breakdown terminal / voltage reference output | Provides stable 5.6 V reference relative to anode; must be biased positive relative to anode for regulation. |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables direct replacement in legacy 5.6 V reference designs without recalibration or resistor adjustment. |
| DO-41 glass hermetic package | Provides moisture resistance and long-term parameter stability in humid or high-reliability environments. |
| 200°C maximum junction temperature | Supports operation in under-hood automotive modules and industrial inverters where ambient exceeds 125°C. |
| Low ZZK = 400 Ω at 1 mA | Ensures usable regulation even in ultra-low-power standby circuits with microampere-level bias currents. |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Bias Reference |
|---|---|
Use Scenario: Regulating 5.6 V reference in TL431-based flyback converter feedback loop. IC Role / Device Role / Timing Role: Zener voltage reference establishing error amplifier threshold for output voltage sensing. Use Value: Tight 5.2–6.0 V tolerance and 45 Ω ZZ minimize output drift across line/load/temperature variations. |
Use Scenario: Providing stable excitation voltage to resistive temperature detector (RTD) bridge. IC Role / Device Role / Timing Role: Precision DC bias source maintaining constant current through RTD element. Use Value: Sub-1 μA leakage at 4.2 V prevents measurement error in high-impedance bridge arms. |
| Overvoltage Clamp for Microcontroller I/O | Automotive Engine Control Unit Reference |
Use Scenario: Clamping 5 V logic rail against transients on CAN/LIN bus interface lines. IC Role / Device Role / Timing Role: Reverse-biased transient suppressor limiting voltage excursion to safe levels. Use Value: 1.0 W power rating absorbs short-duration surges without degradation; DO-41 mechanical robustness withstands vibration. |
Use Scenario: Generating 5.6 V reference for analog-to-digital conversion of knock sensor signals. IC Role / Device Role / Timing Role: High-temperature-stable voltage reference for ADC reference input. Use Value: Guaranteed operation to +200°C junction temperature ensures reliability in proximity to exhaust manifolds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4734A | Same 5.6 V nominal, ±5% tolerance, but rated 1.0 W in DO-41 plastic package (not glass). | Limited to +175°C max junction temperature; less suitable for extreme-temperature environments. | Select when cost sensitivity outweighs hermeticity or extended temperature requirements. |
| MMSZ5232B | SOD-123 surface-mount package; same 5.6 V, ±5%, 500 mW rating; ZZ = 17 Ω @ 20 mA. | Not drop-in replaceable; requires PCB redesign; better suited for space-constrained consumer electronics. | Choose for automated assembly and footprint reduction where thermal derating permits 500 mW operation. |
Compared with 1N4734A and MMSZ5232B, the BZX85C5V6 delivers superior high-temperature capability (+200°C) and hermetic glass packaging for long-term stability, while trading off SMT compatibility and slightly higher ZZ than the SOD-123 variant.
Availability
BZX85C5V6 is available at Aetrix Electronics and suitable for industrial power supply design, automotive sensor signal conditioning, and high-reliability analog reference circuits requiring stable component supply and full traceability.
Supply support for BZX85C5V6 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
Fairchild Semiconductor was a U.S.-based semiconductor company specializing in power management, analog, and discrete components before its acquisition by ON Semiconductor in 2016; its legacy products remain widely deployed in industrial and automotive systems.
The BZX85 series was engineered for general-purpose voltage regulation and reference applications demanding robust thermal performance, consistent Zener characteristics, and JEDEC-standardized through-hole packaging for manual and automated assembly.
FAQ
What is the Zener voltage tolerance of the BZX85C5V6?
The BZX85C5V6 has a guaranteed Zener voltage range of 5.2 V to 6.0 V at IZ = 45 mA, corresponding to a ±5% tolerance about the nominal 5.6 V rating. This tolerance is tested and specified per Fairchild's BZX85C3V3–BZX85C56 datasheet Rev. 1.1.0, ensuring predictable regulation in production designs without binning.
Can the BZX85C5V6 be used in surface-mount designs?
No - the BZX85C5V6 uses a DO-41 axial glass package with 0.4-inch lead spacing and is intended for through-hole mounting only. For surface-mount equivalents, consider the MMSZ5232B (SOD-123) or BZX384-B5V6 (SOT-23), which share the same 5.6 V rating but require PCB layout changes and have different power and thermal ratings.
What is the maximum junction temperature for the BZX85C5V6?
The BZX85C5V6 has a specified operating and storage temperature range of -65°C to +200°C. This maximum junction temperature of +200°C is confirmed in the Absolute Maximum Ratings table of the Fairchild datasheet and enables use in under-hood automotive, industrial motor drive, and downhole tool applications where ambient temperatures exceed 125°C.
How does the BZX85C5V6 compare to the 1N4734A in terms of reliability?
The BZX85C5V6 uses a hermetically sealed DO-41 glass package, offering superior moisture resistance and long-term parameter stability compared to the 1N4734A's plastic DO-41 package. Both share identical electrical specs (5.6 V ±5%, 1.0 W), but the BZX85C5V6's glass construction enhances reliability in high-humidity or high-temperature cyclic environments.
Is forward voltage specified for the BZX85C5V6?
Yes - the BZX85C5V6 specifies a maximum forward voltage (VF) of 1.2 V at forward current (IF) = 200 mA. This value is documented in the Electrical Characteristics section of the Fairchild datasheet and confirms standard silicon diode conduction behavior, useful for polarity verification and basic ESD protection functions.
BZX85C5V6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 5.6 V
- Tolerance:
- ±5%
- Power - Max:
- 1.3 W
- Impedance (Max) (Zzt):
- 7 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 2 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-41G
BZX85C5V6 FAQ
1.How can I place an order for BZX85C5V6 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX85C5V6 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 BZX85C5V6 reliable?
The price and inventory of BZX85C5V6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX85C5V6 is usually 5 days.
3.What payment methods are accepted for BZX85C5V6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX85C5V6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX85C5V6?
BZX85C5V6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX85C5V6 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 BZX85C5V6?
For technical support, including BZX85C5V6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX85C5V6 requirements.
6.How does Aetrix verify that BZX85C5V6 is sourced from the original manufacturer or authorized distributors?
All BZX85C5V6 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 BZX85C5V6 meets industry standards.
7.What is the process for return or replacement of BZX85C5V6?
All BZX85C5V6 units undergo pre-shipment inspection (PSI). If there is an issue with BZX85C5V6, 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 BZX85C5V6 part is unused and in its original packaging.
Return procedure for BZX85C5V6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX85C5V6 Tags
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