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onsemi BZX85C47_T50A
- Part No.:
- BZX85C47_T50A
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZX85C47_T50A.pdf
- Description:
- DIODE ZENER 47V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:3,243
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Product details
Overview
BZX85C47_T50A from onsemi is a 47 V ±5% tolerance, 1.0 W axial-leaded Zener diode in DO-41 glass package, rated for 90 Ω zener impedance at 5 mA test current and 0.25 μA maximum leakage at 33 V reverse voltage, used for precision voltage regulation and overvoltage protection in DC power supplies.
For engineers reviewing the BZX85C47_T50A datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance, power derating above 50°C (6.67 mW/°C), thermal resistance (junction-to-lead), cathode band identification, and compliance with JEDEC DO-204AL mechanical standards.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown when reverse-biased above its specified 47 V nominal zener voltage. It maintains stable regulation across 5 mA to 100 mA operating current range with defined dynamic impedance and low leakage.
The DO-41 glass package provides hermetic sealing and thermal performance suitable for industrial ambient temperatures from –65°C to +200°C. Its axial lead configuration supports through-hole mounting and manual soldering with 3/8″ lead length standard for zener voltage measurement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 44 V min / 50 V max at IZ = 5 mA - defines regulated output range under nominal bias |
| Power Dissipation (PD) | 1.0 W @ TA = 25°C - sets maximum continuous power handling at room ambient |
| Zener Impedance (ZZ) | 90 Ω @ IZ = 5 mA - determines regulation stiffness and output voltage variation under load changes |
| Leakage Current (IR) | 0.25 μA max @ VR = 33 V - ensures minimal standby current in undervoltage clamp circuits |
| Tolerance | ±5% - specifies allowable deviation of actual VZ from nominal 47 V rating |
| Operating Temp Range | –65°C to +200°C - supports deployment in high-reliability industrial and automotive under-hood environments |
| Forward Voltage (VF) | 1.2 V max @ IF = 200 mA - confirms standard silicon PN junction conduction behavior in forward bias |
Pinout & Package
DO-41 glass axial package with cathode identified by a single color band on the body; leads are unmarked but functionally symmetric except for polarity - cathode is banded end, anode is unbanded end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-bias terminal | Connected to higher potential in regulation mode; defines breakdown direction and polarity-sensitive placement |
| Anode (unbanded end) | Reference/ground terminal | Typically tied to system ground or lower-potential rail; completes reverse-bias path for zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Hermetically sealed glass package | Ensures long-term stability and moisture resistance in harsh environments without conformal coating |
| JEDEC DO-204AL (DO-41) compliant | Guarantees mechanical interchangeability with legacy designs and standard PCB footprints |
| Low leakage current (≤0.25 μA) | Minimizes quiescent power loss in battery-backed or energy-sensitive clamp circuits |
| Controlled zener impedance (90 Ω) | Enables predictable voltage deviation under varying load currents up to 100 mA |
| Wide temperature range (–65°C to +200°C) | Supports operation in extended industrial, automotive, and aerospace applications without derating |
Applications
| DC Power Supply Regulation | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Stabilizing unregulated 50–60 V DC rails in industrial control modules. IC Role / Device Role / Timing Role: Voltage reference element providing fixed 47 V regulation point. Use Value: Maintains ±5% output accuracy across 5–100 mA load range with <90 Ω dynamic impedance. |
Use Scenario: Protecting microcontroller I/O pins from transient surges exceeding 33 V. IC Role / Device Role / Timing Role: Shunt clamping device diverting excess current above 47 V threshold. Use Value: Limits voltage excursion to ≤50 V peak with <0.25 μA leakage below clamp threshold. |
| Reference Voltage Source | Signal Level Translation |
Use Scenario: Generating precise 47 V bias for analog front-end amplifiers in test equipment. IC Role / Device Role / Timing Role: Stable two-terminal reference replacing multi-component voltage divider networks. Use Value: Delivers ±5% tolerance and <1% drift over –40°C to +125°C operating range. |
Use Scenario: Level-shifting 3.3 V logic signals to interface with 48 V industrial bus systems. IC Role / Device Role / Timing Role: Bidirectional voltage limiter defining upper and lower signal bounds. Use Value: Clamps high-side excursions to 47 V while allowing forward conduction down to 1.2 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4753A | Same 47 V nominal rating, ±5% tolerance, but rated 1.0 W in DO-41 plastic package; zener impedance 90 Ω @ 5 mA | Plastic encapsulation offers lower cost and higher moisture resistance but reduced high-temp reliability vs. glass | Select for cost-sensitive consumer applications where ambient stays below +150°C |
| BZX85C47-TR | Identical electrical specs and DO-41 glass package, but supplied in tape-and-reel format (not bulk); same 47 V ±5% | No functional difference - only packaging format change for automated assembly | Select when using pick-and-place equipment; otherwise identical performance to BZX85C47_T50A |
Compared with 1N4753A and BZX85C47-TR, the BZX85C47_T50A offers superior thermal stability and hermetic reliability due to its glass package, making it preferred for industrial and automotive applications requiring operation beyond 150°C or long-term storage stability.
Availability
BZX85C47_T50A is available at Aetrix Electronics and suitable for DC power supply regulation, overvoltage protection clamp, and reference voltage source applications requiring stable component supply and long-lifecycle support.
Supply support for BZX85C47_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 BZX85C47_T50A belongs to the BZX85C series of general-purpose Zener diodes designed for reliable voltage regulation and transient suppression in cost-sensitive, high-volume industrial and power supply applications.
FAQ
What is the nominal zener voltage and tolerance of BZX85C47_T50A?
The BZX85C47_T50A has a nominal zener voltage of 47 V with a tolerance of ±5%, meaning its actual breakdown voltage falls between 44 V and 50 V when measured at 5 mA test current and 30°C lead temperature. This specification is confirmed in the onsemi BZX85C3V3–BZX85C56 datasheet Rev. 2 (October 2017), Table "Electrical Characteristics" for device BZX85C47.
What package type and marking identify the cathode on BZX85C47_T50A?
The BZX85C47_T50A uses a DO-41 glass axial package per JEDEC DO-204AL, with cathode identified by a single color band on the banded end of the body. Marking consists of "LOGO", "85C", "47", and "XY" across four lines - the third line "47" denotes the nominal zener voltage, consistent with onsemi's top-marking standard for BZXxx series devices.
What is the maximum power dissipation and derating behavior of BZX85C47_T50A?
The BZX85C47_T50A is rated for 1.0 W power dissipation at 25°C ambient, with linear derating of 6.67 mW/°C above 50°C. This means usable power drops to 0.667 W at 100°C ambient. Derating applies to the junction-to-ambient thermal path and is defined in the Absolute Maximum Ratings table of the official onsemi datasheet.
How does BZX85C47_T50A perform in terms of leakage current and zener impedance?
The BZX85C47_T50A exhibits ≤0.25 μA leakage current at 33 V reverse voltage and 90 Ω zener impedance measured at 5 mA test current. These values ensure tight regulation and minimal standby loss - critical for precision clamp and reference applications. Both parameters are verified in the Electrical Characteristics table of the onsemi BZX85C3V3–BZX85C56 datasheet.
Is BZX85C47_T50A suitable for high-temperature industrial environments?
Yes, the BZX85C47_T50A supports an operating and storage temperature range of –65°C to +200°C, enabled by its hermetically sealed DO-41 glass package. This makes it suitable for under-hood automotive, motor drive, and industrial control applications where sustained exposure to >150°C ambient is expected - a key advantage over plastic-packaged alternatives like 1N4753A.
BZX85C47_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):
- 47 V
- Tolerance:
- ±6%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 33 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
BZX85C47_T50A FAQ
1.How can I place an order for BZX85C47_T50A through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX85C47_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 BZX85C47_T50A reliable?
The price and inventory of BZX85C47_T50A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX85C47_T50A is usually 5 days.
3.What payment methods are accepted for BZX85C47_T50A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX85C47_T50A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX85C47_T50A?
BZX85C47_T50A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX85C47_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 BZX85C47_T50A?
For technical support, including BZX85C47_T50A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX85C47_T50A requirements.
6.How does Aetrix verify that BZX85C47_T50A is sourced from the original manufacturer or authorized distributors?
All BZX85C47_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 BZX85C47_T50A meets industry standards.
7.What is the process for return or replacement of BZX85C47_T50A?
All BZX85C47_T50A units undergo pre-shipment inspection (PSI). If there is an issue with BZX85C47_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 BZX85C47_T50A part is unused and in its original packaging.
Return procedure for BZX85C47_T50A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX85C47_T50A Tags
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MMBZ5240B-7-F
Diodes Incorporated
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onsemi
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