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onsemi BZX55C6V2_T50R
- Part No.:
- BZX55C6V2_T50R
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
BZX55C6V2_T50R.pdf
- Description:
- DIODE ZENER 6.2V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:9,154
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Product details
Overview
BZX55C6V2_T50R from Fairchild Semiconductor is a 6.2 V, ±5% tolerance, 500 mW glass-passivated Zener diode in DO-35 package, designed for precision voltage regulation and reference applications in low-power analog circuits, power supply feedback loops, and overvoltage protection circuits.
For engineers reviewing the BZX55C6V2_T50R datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage accuracy (5.8–6.6 V), dynamic impedance (10 Ω @ 5 mA), maximum reverse leakage (0.1 μA @ 4.96 V), and thermal derating (4.0 mW/°C above 75°C).
Technical Context
The BZX55C6V2_T50R operates as a two-terminal voltage reference device with sharp reverse breakdown at nominal 6.2 V, specified under 5 mA test current and 25°C ambient. Its glass-passivated DO-35 construction ensures stable long-term zener voltage drift and robust moisture resistance.
It exhibits a typical dynamic impedance of 10 Ω at IZ = 5 mA and maintains ≤0.1 μA reverse leakage at VR = 4.96 V (80% of VZ), enabling reliable clamping in low-current bias networks and precision shunt regulator topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.8–6.6 V @ IZ = 5 mA - defines precise clamping threshold for feedback or protection circuits |
| Tolerance | ±5% - guarantees voltage accuracy without post-selection or trimming |
| Power Dissipation | 500 mW @ TL ≤ 75°C - supports continuous operation in compact PCB layouts with 3/8″ lead length |
| Dynamic Impedance (ZZ) | 10 Ω @ IZ = 5 mA - ensures minimal output voltage variation under load transients |
| Reverse Leakage (IR) | ≤0.1 μA @ VR = 4.96 V - enables low-error biasing in high-impedance reference nodes |
| Operating Temp Range | −65°C to +200°C - suitable for automotive under-hood and industrial environments |
Pinout & Package
DO-35 glass axial package with cathode indicated by color band; two-terminal device with no internal polarity-sensitive circuitry beyond standard anode/cathode orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side in shunt regulation; reverse-biased during regulation |
| Cathode | Zener breakdown terminal / voltage reference output | Marked with color band; connected to regulated rail or error amplifier input |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enhances long-term stability and reduces parameter drift vs. plastic-packaged Zeners |
| ±5% VZ tolerance | Eliminates need for binning or external trimming in cost-sensitive consumer and industrial designs |
| Low dynamic impedance (10 Ω) | Maintains tight regulation under varying load currents in feedback paths |
| High temperature rating (200°C max) | Supports deployment in thermally demanding locations such as motor control PCBs or LED drivers |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Clamp Protection |
|---|---|
Use Scenario: Used in optocoupler-coupled feedback loop of isolated DC-DC converters to regulate output voltage. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 6.2 V threshold to TL431 or optocoupler LED drive circuit. Use Value: Enables ±1% output regulation accuracy without secondary-side sensing ICs, reducing BOM count and cost. | Use Scenario: Placed across sensitive IC inputs (e.g., microcontroller ADC pins) to limit transient overvoltage. IC Role / Device Role / Timing Role: Fast-acting clamping element diverting ESD or surge energy before damage occurs. Use Value: Limits peak voltage to ≤6.6 V with sub-μA leakage, preserving signal integrity and preventing latch-up. |
| Low-Power Reference Voltage Source | Current Source Bias Network |
Use Scenario: Provides stable 6.2 V reference for analog sensor conditioning circuits in battery-powered IoT nodes. IC Role / Device Role / Timing Role: Passive voltage reference establishing bias point for op-amp gain stages or ADC reference dividers. Use Value: Delivers <0.1 μA leakage and <10 Ω impedance, minimizing quiescent current draw and voltage error. | Use Scenario: Configured with series resistor to generate constant current for LED bias or transistor base drive. IC Role / Device Role / Timing Role: Voltage-controlled current source element defining IOUT = (VIN − 6.2 V)/RSERIES. Use Value: Achieves ±5% current accuracy over temperature with no active components, simplifying design and improving reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4735A | Same 6.2 V nominal, but ±5% tolerance and 1.0 W power rating in DO-41 package | Higher power handling supports higher current clamping; larger footprint requires layout change | Select when >500 mW dissipation or improved thermal margin is required |
| MMSZ4685 | 6.2 V, ±5%, SOD-123 surface-mount package, 500 mW rating, 15 Ω ZZ | Enables automated assembly and space-constrained designs; higher ZZ reduces regulation precision | Select for modern high-density PCBs where through-hole DO-35 is incompatible with manufacturing flow |
Compared with 1N4735A and MMSZ4685, the BZX55C6V2_T50R offers optimal balance of legacy compatibility, thermal performance in axial leaded form, and proven reliability in industrial feedback systems-making it preferred where DO-35 mechanical fit and 10 Ω impedance are critical.
Availability
BZX55C6V2_T50R is available at Aetrix Electronics and suitable for switch-mode power supply feedback, overvoltage clamp protection, and low-power reference voltage source applications requiring stable component supply and long-lifecycle support.
Supply support for BZX55C6V2_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
Fairchild Semiconductor was a U.S.-based semiconductor company specializing in power management, analog, and discrete devices, acquired by ON Semiconductor in 2016.
The BZX55C series was developed for general-purpose precision voltage regulation in cost-sensitive industrial and consumer electronics, emphasizing stability, wide temperature range, and glass-passivated reliability.
FAQ
What is the nominal zener voltage and tolerance of the BZX55C6V2_T50R?
The BZX55C6V2_T50R has a nominal zener voltage of 6.2 V with a tolerance of ±5%, meaning its actual breakdown voltage falls between 5.8 V and 6.6 V when tested at 5 mA and 25°C. This tolerance is factory-trimmed and guaranteed per the Fairchild datasheet Rev. D1, making the BZX55C6V2_T50R suitable for applications requiring predictable, unadjusted voltage references without external calibration.
What package type and marking does the BZX55C6V2_T50R use?
The BZX55C6V2_T50R uses the DO-35 glass axial package with cathode identified by a color band. Its top marking consists of three lines: first line is the Fairchild logo (F), second line reads "5C", and third line displays "6V2" - conforming to Fairchild's standard marking specification for BZXxx series Zener diodes. This marking enables visual identification and traceability on assembled boards.
What is the maximum power dissipation and thermal derating behavior of the BZX55C6V2_T50R?
The BZX55C6V2_T50R is rated for 500 mW power dissipation at lead temperature (TL) ≤ 75°C with 3/8″ lead length. Above 75°C, it derates linearly at 4.0 mW/°C - meaning at 100°C TL, its usable power drops to 400 mW. This derating curve is defined in the Absolute Maximum Ratings table of the official Fairchild datasheet and must be applied in thermal design to ensure long-term reliability.
How does the BZX55C6V2_T50R perform in terms of dynamic impedance and reverse leakage?
The BZX55C6V2_T50R exhibits a typical dynamic impedance (ZZ) of 10 Ω at IZ = 5 mA, ensuring minimal voltage shift under load changes. Its reverse leakage current is ≤0.1 μA at VR = 4.96 V (80% of nominal VZ), supporting high-impedance bias networks. These values are measured per the Electrical Characteristics table in the Fairchild BZX55C2V4–BZX55C56 datasheet Rev. D1 and reflect actual device behavior under standard test conditions.
Can the BZX55C6V2_T50R replace other 6.2 V Zener diodes like the 1N4735A or MMSZ4685?
The BZX55C6V2_T50R is not a direct pin-compatible replacement for 1N4735A (DO-41) or MMSZ4685 (SOD-123) due to differing packages and mechanical interfaces. While all three share 6.2 V nominal voltage and ±5% tolerance, substitution requires PCB layout revision and validation of thermal and impedance performance. The BZX55C6V2_T50R remains optimal where DO-35 axial mounting and 10 Ω ZZ are design requirements.
BZX55C6V2_T50R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 6.2 V
- Tolerance:
- ±6%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 10 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 2 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.3 V @ 100 mA
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-35
BZX55C6V2_T50R FAQ
1.How can I place an order for BZX55C6V2_T50R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX55C6V2_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 BZX55C6V2_T50R reliable?
The price and inventory of BZX55C6V2_T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX55C6V2_T50R is usually 5 days.
3.What payment methods are accepted for BZX55C6V2_T50R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX55C6V2_T50R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX55C6V2_T50R?
BZX55C6V2_T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX55C6V2_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 BZX55C6V2_T50R?
For technical support, including BZX55C6V2_T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX55C6V2_T50R requirements.
6.How does Aetrix verify that BZX55C6V2_T50R is sourced from the original manufacturer or authorized distributors?
All BZX55C6V2_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 BZX55C6V2_T50R meets industry standards.
7.What is the process for return or replacement of BZX55C6V2_T50R?
All BZX55C6V2_T50R units undergo pre-shipment inspection (PSI). If there is an issue with BZX55C6V2_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 BZX55C6V2_T50R part is unused and in its original packaging.
Return procedure for BZX55C6V2_T50R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX55C6V2_T50R Tags
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