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onsemi BZX85C5V1-T50A
- Part No.:
- BZX85C5V1-T50A
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZX85C5V1-T50A.pdf
- Description:
- DIODE ZENER 5.1V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:156,000
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Product details
Overview
BZX85C5V1-T50A from onsemi is a 5.1 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 BZX85C5V1-T50A datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance (±5%), zener impedance (45 Ω @ 5 mA), power dissipation (1.0 W @ 25°C), thermal derating (6.67 mW/°C above 50°C), and DO-41 mechanical compatibility.
Technical Context
The BZX85C5V1-T50A operates as a silicon planar Zener diode with sharp reverse breakdown at 5.1 V nominal, measured under thermal equilibrium at lead temperature TL = 30°C ±1°C with 3/8″ lead length. Its 45 Ω dynamic impedance at 5 mA test current ensures stable regulation under moderate load variation.
It features a maximum leakage current of 1 μA at VR = 1 V and forward voltage ≤1.2 V at IF = 200 mA. The device is rated for junction/storage temperatures from –65°C to +200°C and uses a hermetically sealed glass DO-41 (JEDEC DO-204AL) package with cathode band marking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.8–5.4 V at IZ = 5 mA; defines precise regulation point for feedback loops and reference rails |
| Tolerance | ±5%; enables predictable voltage clamping without post-production trimming |
| Zener Impedance (ZZ) | 45 Ω @ IZ = 5 mA; determines output voltage stability under varying load current |
| Power Dissipation (PD) | 1.0 W @ TA = 25°C; sets maximum continuous power handling in ambient conditions |
| Thermal Derating | 6.67 mW/°C above 50°C; defines safe power reduction slope for elevated ambient operation |
| Leakage Current (IR) | ≤1 μA @ VR = 1 V; ensures minimal standby current in high-impedance bias networks |
| Forward Voltage (VF) | ≤1.2 V @ IF = 200 mA; supports use as low-drop rectifier or clamp in bidirectional protection |
Pinout & Package
DO-41 glass axial package: hermetically sealed, cathode indicated by color band; leads are tinned copper-clad steel, suitable for wave or hand soldering. Mechanical dimensions conform to JEDEC DO-204AL standard (body diameter 2.03–2.72 mm, overall length ≥25.4 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reverse bias reference ground node | Connected to lower potential side in regulation mode; serves as return path for zener current |
| Cathode | Zener breakdown terminal / Output reference node | Marked with band; connected to regulated voltage rail; source of stabilized 5.1 V reference |
Key Features
| Feature | Design Value |
|---|---|
| Stable Zener voltage with tight ±5% tolerance | Enables accurate voltage referencing without external calibration in DC-DC feedback or sensor excitation |
| Low dynamic impedance (45 Ω) | Maintains <±20 mV output deviation across 1–10 mA load current changes in shunt regulator designs |
| High reliability glass package (DO-41) | Provides hermetic sealing and long-term parameter stability in industrial environments up to 200°C junction temp |
| Wide operating temperature range | Supports deployment in automotive engine control units and outdoor power electronics without derating below –65°C |
| Standardized axial lead form factor | Ensures drop-in compatibility with legacy PCB footprints and automated through-hole assembly processes |
Applications
| Power Supply Regulation | Overvoltage Protection |
|---|---|
Use Scenario: Shunt regulation in low-power linear power supplies and LDO bias networks. IC Role / Device Role / Timing Role: Voltage reference and error-sensing element in feedback loop. Use Value: Maintains 5.1 V output within ±5% across input variations and load currents up to 100 mA using simple resistor bias. |
Use Scenario: Clamping transient surges on 5 V logic rails and microcontroller I/O lines. IC Role / Device Role / Timing Role: Bidirectional voltage limiter protecting downstream CMOS inputs. Use Value: Limits voltage to ≤5.4 V during ESD events while drawing <1 μA leakage during normal operation. |
| Sensor Excitation Reference | Analog Signal Conditioning |
Use Scenario: Providing stable excitation voltage for resistive bridge sensors (e.g., strain gauges, RTDs). IC Role / Device Role / Timing Role: Precision voltage source for ratiometric measurement systems. Use Value: Delivers 5.1 V ±0.255 V reference with <45 Ω source impedance, minimizing gain error in ADC front-ends. |
Use Scenario: Level-shifting and clipping in op-amp-based signal chains (e.g., audio peak limiters, ADC input protectors). IC Role / Device Role / Timing Role: Nonlinear transfer function element defining upper/lower signal bounds. Use Value: Enables symmetric ±5.1 V clipping with fast response (<1 ns rise time) and sub-μA quiescent current. |
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 |
|---|---|---|---|
| 1N4733A | Same 5.1 V nominal, ±5% tolerance, but higher ZZ = 17 Ω and PD = 1.0 W in DO-41; slightly tighter VZ distribution per batch | Preferred in high-volume consumer power adapters where tighter lot-to-lot VZ consistency is prioritized over ultra-low ZZ | Select 1N4733A when statistical VZ clustering matters more than minimum dynamic impedance |
| BZX55C5V1 | Same 5.1 V, ±5%, but lower PD = 500 mW and higher ZZ = 60 Ω; DO-35 package (smaller, less robust thermal path) | Suitable for space-constrained PCBs with <50 mA average current; not recommended for sustained >100 mW dissipation | Choose BZX55C5V1 only if board area is critical and thermal load remains below 300 mW |
Compared with 1N4733A and BZX55C5V1, the BZX85C5V1-T50A delivers superior thermal robustness (1.0 W rating with DO-41) and lower dynamic impedance (45 Ω), making it optimal for industrial power supplies requiring long-term stability under variable load and temperature.
Availability
BZX85C5V1-T50A is available at Aetrix Electronics and suitable for power supply regulation, overvoltage protection, and sensor excitation applications requiring stable component supply, consistent parametric performance, and long-term manufacturability.
Supply support for BZX85C5V1-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
onsemi (formerly ON Semiconductor) is a global semiconductor manufacturer specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The BZX85 series belongs to onsemi's general-purpose Zener diode product line, engineered for cost-effective, reliable voltage reference and clamping in high-volume industrial and power conversion applications.
FAQ
What is the zener voltage tolerance of the BZX85C5V1-T50A?
The BZX85C5V1-T50A has a zener voltage tolerance of ±5%, meaning its breakdown voltage falls between 4.8 V and 5.4 V when tested at IZ = 5 mA and TL = 30°C ±1°C. This tolerance is guaranteed per device and applies across the full operating temperature range of –65°C to +200°C. The BZX85C5V1-T50A maintains this specification without binning or sorting.
Can the BZX85C5V1-T50A be used in surface-mount designs?
No - the BZX85C5V1-T50A uses a DO-41 axial glass package with 0.4–0.6 mm diameter leads, intended exclusively for through-hole mounting. It is not compatible with reflow or wave soldering processes used for SMT. For surface-mount equivalents, consider the MMBZ5231B (SOT-23, 5.1 V) or NZ9F5V1T5G (SOD-923, 5.1 V), both from onsemi.
What is the maximum power dissipation of the BZX85C5V1-T50A at 75°C ambient?
At 75°C ambient, the BZX85C5V1-T50A must be derated from its 1.0 W rating at 25°C. With a derating factor of 6.67 mW/°C above 50°C, the allowable power drops to 1.0 W − (25°C × 6.67 mW/°C) = 833 mW. This value assumes free-air conditions; PCB copper area and airflow significantly affect actual thermal performance of the BZX85C5V1-T50A.
Does the BZX85C5V1-T50A have a specified forward voltage?
Yes - the BZX85C5V1-T50A has a maximum forward voltage (VF) of 1.2 V at forward current (IF) = 200 mA, as specified in the onsemi datasheet. This parameter confirms its usability as a low-voltage clamp or rectifier in bidirectional protection circuits, and is measured under pulsed conditions to avoid self-heating effects on the BZX85C5V1-T50A junction.
How is the cathode identified on the BZX85C5V1-T50A package?
The cathode of the BZX85C5V1-T50A is marked by a distinct color band (typically black or dark gray) located near one end of the DO-41 glass body. This band aligns with the cathode terminal, which must be connected to the higher-potential side of the circuit during zener operation. The anode is the unmarked lead opposite the band - a consistent identification method across all BZX85C-series devices including the BZX85C5V1-T50A.
BZX85C5V1-T50A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 5.1 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-T50A FAQ
1.How can I place an order for BZX85C5V1-T50A through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX85C5V1-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 BZX85C5V1-T50A reliable?
The price and inventory of BZX85C5V1-T50A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX85C5V1-T50A is usually 5 days.
3.What payment methods are accepted for BZX85C5V1-T50A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX85C5V1-T50A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX85C5V1-T50A?
BZX85C5V1-T50A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX85C5V1-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 BZX85C5V1-T50A?
For technical support, including BZX85C5V1-T50A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX85C5V1-T50A requirements.
6.How does Aetrix verify that BZX85C5V1-T50A is sourced from the original manufacturer or authorized distributors?
All BZX85C5V1-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 BZX85C5V1-T50A meets industry standards.
7.What is the process for return or replacement of BZX85C5V1-T50A?
All BZX85C5V1-T50A units undergo pre-shipment inspection (PSI). If there is an issue with BZX85C5V1-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 BZX85C5V1-T50A part is unused and in its original packaging.
Return procedure for BZX85C5V1-T50A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX85C5V1-T50A Tags
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