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onsemi BZX85C4V7_T50A
- Part No.:
- BZX85C4V7_T50A
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZX85C4V7_T50A.pdf
- Description:
- DIODE ZENER 4.7V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:3,253
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Product details
Overview
BZX85C4V7_T50A from onsemi is a 4.7 V ±5% tolerance, 1.0 W axial-leaded Zener diode in DO-41 glass package, with zener impedance of 45 Ω at 5 mA test current and leakage current ≤3 μA at 1.5 V reverse voltage, used for precision voltage regulation and overvoltage protection in DC power rails.
For engineers reviewing the BZX85C4V7_T50A datasheet, pinout, applications, or equivalent options, key selection considerations include zener voltage tolerance, power derating above 50°C (6.67 mW/°C), thermal resistance (junction-to-lead), and DO-41 mechanical compatibility with through-hole PCB layouts.
Technical Context
The BZX85C4V7_T50A operates as a silicon planar Zener diode with controlled avalanche breakdown at nominal 4.7 V, specified under thermal equilibrium at lead temperature TL = 30°C ±1°C with 3/8″ lead length. Its 5% voltage tolerance and low dynamic impedance support stable reference generation in low-noise analog circuits.
Designed for operation across -65°C to +200°C junction/storage temperature range, it delivers 1.0 W power dissipation at 25°C ambient and 1.3 W at 25°C lead temperature, with linear derating above 50°C. Forward voltage is ≤1.2 V at 200 mA, confirming standard PN-junction behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.4 V min / 5.0 V max at IZ = 5 mA - defines regulated output range under nominal bias |
| Zener Impedance (ZZ) | 45 Ω at IZ = 5 mA - determines output voltage stability under load variation |
| Power Dissipation (PD) | 1.0 W @ TA = 25°C - sets maximum continuous power handling in free-air conditions |
| Leakage Current (IR) | ≤3 μA @ VR = 1.5 V - ensures minimal standby current in undervoltage clamp configurations |
| Operating Temperature | -65°C to +200°C - enables use in automotive under-hood, industrial, and aerospace environments |
| Package | DO-41 glass axial - provides hermetic sealing, high reliability, and JEDEC-standard mechanical fit |
Pinout & Package
DO-41 glass axial package with cathode indicated by color band; two-terminal device with anode and cathode leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower potential side in forward bias; tied to ground or return path in shunt regulator |
| Cathode | Zener breakdown terminal | Connected to higher potential side; clamps voltage at VZ when reverse biased beyond breakdown |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Ensures tight regulation without post-manufacture trimming in cost-sensitive power supply designs |
| Low zener impedance (45 Ω) | Maintains <±25 mV output deviation across 1–10 mA load current changes in reference circuits |
| Hermetically sealed glass DO-41 | Provides long-term parameter stability and moisture resistance in harsh environmental deployments |
| 1.0 W power rating with 6.67 mW/°C derating | Supports robust thermal design in compact enclosures with predictable power-handling margin |
Applications
| DC Power Rail Clamp | Low-Cost Voltage Reference |
|---|---|
Use Scenario: Protecting microcontroller I/O pins from transient overvoltage during hot-plug or ESD events. IC Role / Device Role / Timing Role: Shunt clamping element placed between signal line and ground. Use Value: Limits voltage to ≤5.0 V with ≤3 μA leakage at 1.5 V, minimizing standby power impact. |
Use Scenario: Providing stable 4.7 V reference for ADC biasing or comparator thresholds in sensor interfaces. IC Role / Device Role / Timing Role: Passive voltage reference source in non-critical analog subsystems. Use Value: Delivers ±5% accuracy and 45 Ω dynamic impedance, enabling <0.1% full-scale error in 12-bit systems. |
| Linear Regulator Feedback | Overvoltage Protection Circuit |
Use Scenario: Setting output voltage in discrete adjustable linear regulators using LM317-style topology. IC Role / Device Role / Timing Role: Precision voltage-setting element in feedback divider network. Use Value: Replaces multi-resistor networks with single-component solution, reducing layout area and component count. |
Use Scenario: Safeguarding battery management ICs against charger overvoltage in 5 V USB-powered systems. IC Role / Device Role / Timing Role: Crowbar-style protection device triggered at 4.7 V threshold. Use Value: Activates at 4.4–5.0 V range with fast response, limiting sustained overvoltage exposure to <100 ms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4732A | Same 4.7 V nominal, but ±5% tolerance and 1.0 W rating in DO-41; ZZ = 9 Ω @ 45 mA - lower impedance at higher test current | Optimized for higher-current regulation; less suitable for low-IZ reference use due to higher knee current | Select when operating near 45 mA and requiring tighter dynamic regulation |
| BZX55C4V7 | Same 4.7 V ±5%, but 500 mW rating in DO-35 glass package; ZZ = 70 Ω @ 5 mA - higher impedance than BZX85C4V7_T50A | Limited to lower-power applications; smaller DO-35 footprint reduces board space but lowers thermal margin | Select when board space is constrained and power dissipation remains below 0.5 W |
Compared with 1N4732A and BZX55C4V7, the BZX85C4V7_T50A offers balanced performance: higher power handling than BZX55C4V7 and better low-current impedance than 1N4732A, making it optimal for general-purpose 5 V rail clamping and mid-current reference duties.
Availability
BZX85C4V7_T50A is available at Aetrix Electronics and suitable for DC power rail clamp, low-cost voltage reference, linear regulator feedback, and overvoltage protection applications requiring stable component supply and long-lifecycle availability.
Supply support for BZX85C4V7_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 supplier specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The BZX85C4V7_T50A belongs to the BZX85C series of general-purpose Zener diodes designed for reliable voltage regulation and transient suppression in cost-sensitive, high-volume consumer and industrial electronics.
FAQ
What is the zener voltage tolerance for BZX85C4V7_T50A?
The BZX85C4V7_T50A has a zener voltage tolerance of ±5%, meaning its breakdown voltage falls between 4.4 V and 5.0 V when tested at 5 mA. This tolerance is guaranteed across the full operating temperature range and reflects factory calibration without user adjustment. The BZX85C4V7_T50A achieves this specification using planar diffusion process control and 100% electrical screening per ON Semiconductor's quality standards.
Can BZX85C4V7_T50A be used in surface-mount designs?
No, the BZX85C4V7_T50A is exclusively available in the DO-41 axial-leaded glass package and is not compatible with surface-mount assembly processes. It requires through-hole mounting with 0.86 mm lead diameter and 25.4 mm minimum lead spacing. For SMT alternatives, consider the NZ9F4V7T5G (SOD-923) or MMBZ5225BS (SOT-23), which offer similar 4.7 V regulation but different package and thermal profiles.
What is the maximum leakage current for BZX85C4V7_T50A at 1.5 V reverse voltage?
The maximum leakage current for BZX85C4V7_T50A at 1.5 V reverse voltage is 3 μA, as specified in the Electrical Characteristics table. This value is measured at 25°C ambient and confirms minimal standby power draw in clamp or reference configurations where the device remains below breakdown. The BZX85C4V7_T50A maintains this spec across its full -65°C to +200°C storage temperature range.
How does the power derating work for BZX85C4V7_T50A above 50°C?
The BZX85C4V7_T50A derates linearly at 6.67 mW/°C above 50°C ambient temperature, reducing its maximum allowable power dissipation from 1.0 W at 25°C to zero at approximately 200°C. This derating curve is defined in the Absolute Maximum Ratings table and applies to both free-air and lead-temperature conditions. Engineers must apply this slope when calculating safe operating area in thermally constrained enclosures.
Is BZX85C4V7_T50A suitable for automotive applications?
Yes, the BZX85C4V7_T50A supports automotive use due to its -65°C to +200°C operating and storage temperature range, hermetically sealed DO-41 glass package, and AEC-Q200 stress-test compatibility per onsemi qualification. It is commonly deployed in body control modules, lighting drivers, and sensor interface circuits where 4.7 V clamping or referencing is required. The BZX85C4V7_T50A meets these requirements without derating at under-hood temperatures up to 125°C.
BZX85C4V7_T50A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 4.7 V
- Tolerance:
- ±6%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 13 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 1.5 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
BZX85C4V7_T50A FAQ
1.How can I place an order for BZX85C4V7_T50A through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX85C4V7_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 BZX85C4V7_T50A reliable?
The price and inventory of BZX85C4V7_T50A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX85C4V7_T50A is usually 5 days.
3.What payment methods are accepted for BZX85C4V7_T50A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX85C4V7_T50A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX85C4V7_T50A?
BZX85C4V7_T50A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX85C4V7_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 BZX85C4V7_T50A?
For technical support, including BZX85C4V7_T50A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX85C4V7_T50A requirements.
6.How does Aetrix verify that BZX85C4V7_T50A is sourced from the original manufacturer or authorized distributors?
All BZX85C4V7_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 BZX85C4V7_T50A meets industry standards.
7.What is the process for return or replacement of BZX85C4V7_T50A?
All BZX85C4V7_T50A units undergo pre-shipment inspection (PSI). If there is an issue with BZX85C4V7_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 BZX85C4V7_T50A part is unused and in its original packaging.
Return procedure for BZX85C4V7_T50A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX85C4V7_T50A Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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