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onsemi BZX85C5V1_T50R
- Part No.:
- BZX85C5V1_T50R
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZX85C5V1_T50R.pdf
- Description:
- DIODE ZENER 5.1V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:5,067
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Product details
Overview
BZX85C5V1_T50R from onsemi is a 5.1 V ±5% tolerance, 1.0 W axial-leaded Zener diode in DO-41 glass package, rated for 45 Ω zener impedance at 5 mA test current and 1 μA leakage current at 1 V reverse voltage, used for precision voltage regulation and overvoltage protection in power supply feedback paths.
For engineers reviewing the BZX85C5V1_T50R datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance, power derating above 50°C, thermal resistance, cathode band identification, and compatibility with through-hole PCB assembly processes.
Technical Context
The BZX85C5V1_T50R operates as a silicon planar Zener diode with sharp reverse breakdown characteristics, designed for stable DC voltage reference and clamping functions in linear power supplies and analog circuitry. Its 5.1 V nominal zener voltage is specified at IZ = 5 mA with thermal equilibrium maintained at lead temperature TL = 30°C ±1°C.
It features a DO-41 glass package with cathode indicated by a color band, supports continuous power dissipation up to 1.0 W at 25°C ambient, and exhibits 6.67 mW/°C linear derating above 50°C. The device is rated for operation across –65°C to +200°C junction and storage temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.8 V min / 5.4 V max at IZ = 5 mA - defines regulated output voltage window under standard test conditions |
| Zener Impedance (ZZ) | 45 Ω @ IZ = 5 mA - indicates low dynamic resistance for stable regulation under load variation |
| Power Dissipation (PD) | 1.0 W @ TA = 25°C - sets maximum continuous power handling without heatsinking |
| Leakage Current (IR) | 1 μA max @ VR = 1 V - ensures minimal standby current in reverse-biased standby circuits |
| Tolerance | ±5% - specifies allowable deviation of nominal 5.1 V rating for production binning and design margining |
| Package | DO-41 glass case - provides hermetic sealing, axial lead form factor, and JEDEC-standard mechanical footprint |
| Operating Temp | –65°C to +200°C - enables use in automotive under-hood, industrial control, and high-reliability environments |
Pinout & Package
DO-41 glass axial package with cathode identified by a single color band on the body. Leads are tinned copper-clad steel, suitable for wave or hand soldering. Package conforms to JEDEC DO-204AL standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower potential side in reverse-bias regulation; carries forward current up to 200 mA (VF ≤ 1.2 V) |
| Cathode | Zener breakdown terminal | Marked with color band; connected to higher potential side during regulation; defines reference node in shunt regulator topologies |
Key Features
| Feature | Design Value |
|---|---|
| Stable Zener voltage | 5.1 V ±5% with tight distribution across production lots for predictable feedback loop design |
| Low zener impedance | 45 Ω at 5 mA enables <10 mV output variation per 1 mA load change in shunt regulators |
| High-temperature operation | Rated to +200°C junction temperature supports under-hood automotive and industrial motor drive applications |
| Hermetic glass package | DO-41 glass construction prevents moisture ingress and ensures long-term parameter stability in humid environments |
| Standard axial footprint | Compatible with legacy through-hole assembly lines and manual prototyping without adapter requirements |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Clamp Circuit |
|---|---|
Use Scenario: Used in optocoupler-coupled feedback path of isolated AC/DC converters to regulate output voltage. IC Role / Device Role / Timing Role: Zener reference element setting error amplifier threshold in TL431-based feedback networks. Use Value: 5.1 V nominal voltage aligns with TL431 reference input range, enabling accurate 12 V or 24 V output regulation with ±1% system tolerance. |
Use Scenario: Placed across sensitive IC inputs to limit transient overvoltage from ESD or inductive switching. IC Role / Device Role / Timing Role: Passive clamping device diverting surge current away from downstream logic or analog inputs. Use Value: 1.0 W power rating absorbs 100 ns, 1 kV transients without degradation when paired with series current-limiting resistor. |
| Linear Regulator Reference | Temperature-Stable Bias Network |
Use Scenario: Provides fixed reference voltage for adjustable LDOs or discrete transistor biasing in analog front-ends. IC Role / Device Role / Timing Role: Shunt voltage reference establishing base-emitter or gate-source bias point. Use Value: ±5% tolerance and low 45 Ω impedance ensure <±20 mV drift over 0–70°C ambient in unheated enclosures. |
Use Scenario: Integrated into thermistor-compensated bias chains for RF power amplifiers or sensor signal conditioning. IC Role / Device Role / Timing Role: Stable voltage node anchoring resistor divider ratios against thermal coefficient drift. Use Value: –65°C to +200°C operating range allows direct mounting near heat sources while maintaining reference integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4733A | 5.1 V ±5%, 1.0 W, DO-41, but 17 Ω ZZ @ 49 mA - lower impedance at higher test current | Optimized for higher-current regulation; less stable at sub-5 mA bias points common in low-power feedback | Select when operating near 49 mA test current or requiring tighter dynamic regulation under heavy load |
| BZX55C5V1 | 5.1 V ±5%, 500 mW, DO-35 glass - same voltage grade but 50% lower power rating and smaller package | Suitable only for signal-level clamping or low-power references; not recommended for >0.5 W continuous dissipation | Choose for space-constrained PCBs where thermal load is limited to 0.5 W and DO-35 footprint is acceptable |
Compared with BZX85C5V1_T50R, the 1N4733A offers lower dynamic impedance but requires higher bias current, while the BZX55C5V1 reduces size and power capability - selection depends on required dissipation, board area, and operating current range.
Availability
BZX85C5V1_T50R is available at Aetrix Electronics and suitable for switch-mode power supply feedback, overvoltage clamp circuits, and linear regulator reference designs requiring stable component supply with full traceability and extended lifecycle support.
Supply support for BZX85C5V1_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 manufacturer specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The BZX85C5V1_T50R belongs to the BZX85C series of general-purpose Zener diodes engineered for cost-effective, reliable voltage regulation and protection in high-volume industrial and power conversion applications.
FAQ
What is the zener voltage tolerance of BZX85C5V1_T50R?
The BZX85C5V1_T50R has a zener voltage tolerance of ±5%, meaning its actual breakdown voltage falls between 4.8 V and 5.4 V when measured at 5 mA test current and thermal equilibrium. This tolerance is confirmed in the onsemi datasheet revision 2 (October 2017) and applies to all units within the BZX85C5V1_T50R orderable part number. Designers must account for this range when calculating feedback divider ratios or clamping thresholds.
Does BZX85C5V1_T50R have a cathode marking?
Yes, BZX85C5V1_T50R uses a visible cathode band - a single color band on the glass body - to identify the cathode terminal. This marking follows JEDEC DO-41 standards and is consistent across all BZX85C-series devices. The anode is the unmarked lead, and correct polarity is essential for proper reverse-bias operation in regulation or clamping circuits.
What is the maximum power dissipation for BZX85C5V1_T50R at 75°C ambient?
At 75°C ambient, BZX85C5V1_T50R's maximum power dissipation is 0.833 W. This is calculated using the 6.67 mW/°C derating factor applied above 50°C: (75°C − 50°C) × 6.67 mW/°C = 166.75 mW reduction from the 1.0 W rating at 25°C. The resulting 833 mW limit ensures safe junction temperature operation without external heatsinking.
Is BZX85C5V1_T50R suitable for automotive under-hood applications?
Yes, BZX85C5V1_T50R is rated for junction temperatures from –65°C to +200°C and packaged in hermetically sealed DO-41 glass, making it suitable for under-hood automotive environments. Its thermal stability and moisture resistance meet requirements for engine control modules and powertrain sensors where ambient temperatures exceed 125°C and humidity exposure is present.
What is the forward voltage of BZX85C5V1_T50R?
The forward voltage of BZX85C5V1_T50R is 1.2 V maximum at 200 mA forward current, as specified in the onsemi datasheet. This parameter is relevant when the device is used in forward-conduction mode (e.g., as a low-voltage clamp or ESD protection element), though its primary function is reverse-bias Zener regulation.
BZX85C5V1_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):
- 5.1 V
- Tolerance:
- ±6%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 10 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 2 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
BZX85C5V1_T50R FAQ
1.How can I place an order for BZX85C5V1_T50R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX85C5V1_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 BZX85C5V1_T50R reliable?
The price and inventory of BZX85C5V1_T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX85C5V1_T50R is usually 5 days.
3.What payment methods are accepted for BZX85C5V1_T50R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX85C5V1_T50R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX85C5V1_T50R?
BZX85C5V1_T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX85C5V1_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 BZX85C5V1_T50R?
For technical support, including BZX85C5V1_T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX85C5V1_T50R requirements.
6.How does Aetrix verify that BZX85C5V1_T50R is sourced from the original manufacturer or authorized distributors?
All BZX85C5V1_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 BZX85C5V1_T50R meets industry standards.
7.What is the process for return or replacement of BZX85C5V1_T50R?
All BZX85C5V1_T50R units undergo pre-shipment inspection (PSI). If there is an issue with BZX85C5V1_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 BZX85C5V1_T50R part is unused and in its original packaging.
Return procedure for BZX85C5V1_T50R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX85C5V1_T50R Tags
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MMBZ5240B-7-F
Diodes Incorporated
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Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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