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onsemi BZX85C5V1
- Part No.:
- BZX85C5V1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZX85C5V1.pdf
- Description:
- DIODE ZENER 5.1V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:6,194
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Product details
Overview
BZX85C5V1 from ON Semiconductor is a 5.1 V, 1.0 W axial-leaded Zener diode in DO-41 glass package, with ±5% tolerance, 45 Ω dynamic impedance at 5 mA, and 1 μA leakage current at 1 V reverse bias - used for voltage regulation and reference in low-power linear power supplies and overvoltage protection circuits.
For engineers reviewing the BZX85C5V1 datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage accuracy, power dissipation capability at elevated ambient temperatures, thermal derating slope, cathode identification marking, and compatibility with through-hole PCB assembly processes.
Technical Context
The BZX85C5V1 operates as a silicon planar Zener diode with controlled avalanche breakdown at nominal 5.1 V, specified under thermal equilibrium conditions at lead temperature TL = 30°C ±1°C and 3/8″ lead length. Its DO-41 glass package provides hermetic sealing and stable long-term voltage reference performance.
Zener voltage is guaranteed between 4.8 V (min) and 5.4 V (max) at test current IZ = 1 mA; dynamic impedance ZZ is 45 Ω at IZ = 5 mA and drops to ≤500 Ω at knee current IZK = 1 mA. Forward voltage VF is ≤1.2 V at IF = 200 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.8 V to 5.4 V at IZ = 1 mA - defines regulation band for precision low-voltage reference |
| Power Dissipation (PD) | 1.0 W at TA = 25°C - sets maximum continuous power handling in free-air conditions |
| Zener Impedance (ZZ) | 45 Ω at IZ = 5 mA - indicates regulation stiffness under typical bias; lower values improve line/load regulation |
| Leakage Current (IR) | 1 μA max at VR = 1 V - ensures minimal standby current in reverse-biased standby or sensing paths |
| Thermal Derating | 6.67 mW/°C above 50°C - determines usable power envelope in high-ambient industrial environments |
| Package | DO-41 glass case with cathode band - enables manual or automated through-hole insertion and visual polarity identification |
| Operating Temp | −65°C to +200°C - supports deployment in automotive under-hood, industrial control, and aerospace subsystems |
Pinout & Package
DO-41 glass axial package with cathode identified by a single color band on the body; anode and cathode leads are unmarked but electrically symmetric except for polarity - standard for through-hole mounting with 0.4–0.6 mm lead diameter and 25.4 mm minimum lead spacing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower potential node when used in shunt regulation |
| Cathode | Zener breakdown terminal / voltage reference output | Connected to regulated node; marked by colored band; reverse-biased during regulation |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables predictable regulation without post-assembly trimming in cost-sensitive consumer and industrial designs |
| 1.0 W power rating | Supports robust transient suppression and sustained reference operation in 5 V rail monitoring applications |
| Low 1 μA leakage at 1 V | Minimizes quiescent current draw in battery-backed or energy-harvesting systems |
| DO-41 glass hermetic seal | Ensures long-term parameter stability and moisture resistance in humid or high-reliability environments |
| JEDEC-compliant mechanical outline | Guarantees compatibility with standard wave-soldering fixtures and automated insertion tooling |
Applications
| 5 V Linear Power Supply Regulation | Microcontroller Reset Circuit Reference |
|---|---|
|
Use Scenario: Stabilizing unregulated 7–9 V DC input to deliver clean 5 V for analog front-end circuitry. IC Role / Device Role / Timing Role: Shunt voltage regulator maintaining constant 5.1 V across load despite input ripple or load variation. Use Value: Delivers stable reference without active feedback components; leverages 45 Ω ZZ to suppress 100 Hz ripple by >30 dB. |
Use Scenario: Providing precise 5 V threshold for reset ICs like MAX809 or STM8S reset inputs. IC Role / Device Role / Timing Role: Voltage reference element defining logic-high reset release point in microcontroller power-up sequencing. Use Value: ±5% tolerance ensures reliable reset assertion across temperature; 1 μA IR avoids loading weak pull-up networks. |
| Overvoltage Clamp for GPIO Protection | ADC Reference Divider Stability |
|
Use Scenario: Protecting 5 V-tolerant MCU GPIO pins from ESD or supply transients exceeding 5.5 V. IC Role / Device Role / Timing Role: Transient voltage clamp diverting surge current away from sensitive input structures. Use Value: 1.0 W rating absorbs 8 kV HBM ESD pulses; cathode-band marking prevents reverse installation during hand-soldering. |
Use Scenario: Biasing resistive divider networks feeding SAR ADC reference inputs in data acquisition modules. IC Role / Device Role / Timing Role: Low-drift voltage reference stabilizing divider ratio against supply fluctuations. Use Value: −65°C to +200°C operating range maintains reference accuracy in thermally cycling industrial enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4733A | Same 5.1 V nominal, but ±5% tolerance and 1.0 W rating; higher ZZ = 17 Ω at 49 mA (vs. BZX85C5V1's 45 Ω at 5 mA) | Optimized for higher-current regulation; less effective at low bias currents (<5 mA) | Select 1N4733A when operating near full power; prefer BZX85C5V1 for low-quiescent, precision-clamp roles |
| MMBZ5221B | SOT-23 surface-mount package; same 5.1 V, ±5%; lower PD = 350 mW; ZZ = 17 Ω at 20 mA | Requires rework for space-constrained PCBs; unsuitable for through-hole legacy designs or high-energy clamping | Choose MMBZ5221B only for new SMT layouts; BZX85C5V1 remains preferred for repair, prototyping, and high-reliability through-hole use |
Compared with 1N4733A and MMBZ5221B, the BZX85C5V1 offers superior thermal stability in axial through-hole form, optimized low-current regulation performance, and proven field reliability in industrial power supply designs - making it the default choice where mechanical robustness and legacy compatibility are required.
Availability
BZX85C5V1 is available at Aetrix Electronics and suitable for 5 V power supply regulation, microcontroller reset circuit design, and GPIO overvoltage protection requiring stable component supply and long-lifecycle availability.
Supply support for BZX85C5V1 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, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The BZX85 series belongs to ON Semiconductor's general-purpose Zener diode product line, engineered for cost-effective, reliable voltage regulation and reference in high-volume industrial and consumer electronics.
FAQ
What is the exact zener voltage range for BZX85C5V1 at 1 mA test current?
The BZX85C5V1 has a guaranteed zener voltage range of 4.8 V (minimum) to 5.4 V (maximum) when measured at IZ = 1 mA, TL = 30°C ±1°C, and 3/8″ lead length - consistent with its ±5% tolerance grade and documented in ON Semiconductor's BZX85C3V3–BZX85C56 datasheet Rev. 2.
Can BZX85C5V1 be used in surface-mount designs?
No - the BZX85C5V1 uses a DO-41 axial glass package designed exclusively for through-hole mounting. For surface-mount equivalents, consider the MMBZ5221B (SOT-23) or NZ9F5V1T5G (SOD-923), both offering 5.1 V regulation but requiring PCB redesign and requalification of thermal and electrical behavior.
What is the maximum allowable junction temperature for BZX85C5V1?
The BZX85C5V1 has a maximum junction temperature (TJ) of +200°C, matching its storage temperature limit. This allows operation in high-ambient environments such as engine control units or industrial motor drives, provided power dissipation remains within derated limits above 50°C ambient.
How is cathode polarity identified on the BZX85C5V1 package?
The cathode of the BZX85C5V1 is marked by a single color band on the glass body - standard DO-41 convention. The unmarked end is the anode. This marking is visible before and after soldering, enabling error-proof manual assembly and optical inspection verification.
Does BZX85C5V1 meet RoHS and REACH compliance requirements?
Yes - the BZX85C5V1 manufactured by ON Semiconductor conforms to RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006, with lead-free terminations and halogen-free packaging. Compliance documentation is available via ON Semiconductor's product change notifications and material declarations portal.
BZX85C5V1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Bulk
- 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 FAQ
1.How can I place an order for BZX85C5V1 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX85C5V1 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 reliable?
The price and inventory of BZX85C5V1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX85C5V1 is usually 5 days.
3.What payment methods are accepted for BZX85C5V1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX85C5V1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX85C5V1?
BZX85C5V1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX85C5V1 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?
For technical support, including BZX85C5V1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX85C5V1 requirements.
6.How does Aetrix verify that BZX85C5V1 is sourced from the original manufacturer or authorized distributors?
All BZX85C5V1 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 meets industry standards.
7.What is the process for return or replacement of BZX85C5V1?
All BZX85C5V1 units undergo pre-shipment inspection (PSI). If there is an issue with BZX85C5V1, 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 part is unused and in its original packaging.
Return procedure for BZX85C5V1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX85C5V1 Tags
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