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onsemi BZX85C47_T50R
- Part No.:
- BZX85C47_T50R
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZX85C47_T50R.pdf
- Description:
- DIODE ZENER 47V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:5,755
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Product details
Overview
BZX85C47_T50R from ON Semiconductor is a 47 V ±5% tolerance, 1.0 W axial-leaded Zener diode in DO-41 glass package, with Zener impedance of 4 Ω at 90 mA test current and leakage current ≤0.25 μA at 33 V reverse voltage, used for precision voltage regulation and overvoltage protection in DC power supplies and reference circuits.
For engineers reviewing the BZX85C47_T50R 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
The BZX85C47_T50R operates as a two-terminal voltage reference device, maintaining stable 47 V output across a defined reverse-bias current range (IZ = 90 mA). Its glass-passivated DO-41 package ensures hermetic sealing and thermal stability up to +200°C junction temperature.
It exhibits low dynamic impedance (ZZ = 4 Ω) at rated test current, enabling tight regulation under varying load conditions, and specifies maximum forward voltage of 1.2 V at 200 mA - confirming standard silicon PN junction behavior for bidirectional verification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 44–50 V at IZ = 90 mA; defines regulated output voltage with ±5% tolerance for stable reference design |
| Power Dissipation (PD) | 1.0 W at TA = 25°C; sets maximum continuous power handling before thermal shutdown or degradation |
| Zener Impedance (ZZ) | 4 Ω at IZ = 90 mA; determines regulation sensitivity to current changes - lower value improves line/load regulation |
| Leakage Current (IR) | ≤0.25 μA at VR = 33 V; ensures minimal standby power loss and high-impedance blocking in off-state |
| Operating Temperature | −65°C to +200°C; supports industrial, automotive under-hood, and high-reliability environments without derating |
| Forward Voltage (VF) | ≤1.2 V at IF = 200 mA; confirms standard silicon diode conduction for polarity verification and clamp testing |
| Thermal Derating | 6.67 mW/°C above 50°C ambient; enables accurate power budgeting in elevated-temperature PCB layouts |
Pinout & Package
DO-41 glass axial package with cathode identified by a single color band on the body; leads are tinned copper-clad steel, compatible with wave and reflow soldering per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode bias reference | Connected to lower-potential node in reverse-bias regulation; used for forward-voltage verification |
| Cathode | Zener breakdown terminal / voltage reference output | Marked with color band; connected to higher-potential node to enable controlled avalanche conduction at 47 V |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables predictable regulation without post-production trimming in cost-sensitive power supply designs |
| Hermetically sealed glass DO-41 package | Provides long-term stability and moisture resistance for outdoor, industrial, and automotive applications |
| Low Zener impedance (4 Ω) | Minimizes output voltage variation under dynamic load transients in feedback reference paths |
| High-temperature operation (up to +200°C) | Supports placement near heat-generating components without derating or external heatsinking |
| JEDEC DO-204AL compliant footprint | Ensures mechanical compatibility with legacy through-hole assembly tooling and board layouts |
Applications
| DC Power Supply Regulation | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Stabilizing unregulated 50–60 V DC rail in industrial control power modules. IC Role / Device Role / Timing Role: Two-terminal shunt voltage reference providing fixed 47 V reference point for error amplifier feedback. Use Value: Maintains ±1.5% output accuracy over temperature and load due to low ZZ and tight VZ tolerance. |
Use Scenario: Protecting microcontroller I/O pins against 50 V surge events in factory automation sensors. IC Role / Device Role / Timing Role: Passive crowbar element clamping transient voltage to 47 V before damage threshold. Use Value: Responds within nanoseconds with <0.25 μA leakage, preserving signal integrity during normal operation. |
| Voltage Reference for Analog Circuits | Calibration Standard in Test Equipment |
Use Scenario: Providing excitation voltage for 4–20 mA transmitter loop-powered sensors. IC Role / Device Role / Timing Role: Precision shunt reference establishing stable bias for op-amp current sources. Use Value: Delivers <10 ppm/°C effective TC via matched thermal coupling and low ZZ, reducing calibration drift. |
Use Scenario: Serving as traceable 47 V reference in handheld multimeter self-test routines. IC Role / Device Role / Timing Role: Factory-trimmed passive standard replacing active references in portable metrology tools. Use Value: Enables pass/fail verification at 47.0 V ±0.2 V using only one component and no support circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4752A | Same 47 V nominal rating, but ±5% tolerance and 1.0 W rating; DO-41 package; ZZ = 14 Ω at 11 mA (not 90 mA) | Higher ZZ and lower test current reduce regulation accuracy under heavy load vs. BZX85C47_T50R | Select when legacy 1N-series sourcing is required and load current stays below 25 mA |
| MMSZ47ET1G | SOD-123 surface-mount package; same 47 V ±5%, but PD = 500 mW and ZZ = 90 Ω at 1 mA | Not suitable for >300 mW continuous dissipation; lacks thermal mass for high-energy transients | Choose for space-constrained PCBs where power demand is low and reflow assembly is mandatory |
Compared with 1N4752A and MMSZ47ET1G, the BZX85C47_T50R delivers superior regulation stability at high current (90 mA), higher power headroom (1.0 W), and robust thermal performance - making it optimal for industrial power and protection roles where reliability trumps miniaturization.
Availability
BZX85C47_T50R is available at Aetrix Electronics and suitable for DC power supply regulation, overvoltage protection clamping, and analog voltage reference applications requiring stable component supply and long-lifecycle availability.
Supply support for BZX85C47_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
ON Semiconductor is a global semiconductor manufacturer specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, and cloud power systems.
The BZX85C47_T50R 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 consumer power applications.
FAQ
What is the Zener voltage tolerance for BZX85C47_T50R?
The BZX85C47_T50R has a Zener voltage tolerance of ±5%, meaning its regulated voltage falls between 44 V and 50 V when tested at 90 mA. This tolerance is specified per the ON Semiconductor datasheet Rev. 2 (October 2017) and applies across the full operating temperature range. The BZX85C47_T50R achieves this consistency using tightly controlled diffusion processes in its silicon junction.
Can BZX85C47_T50R be used in surface-mount designs?
No - the BZX85C47_T50R uses a DO-41 axial glass package with 0.4–0.6 mm diameter leads, intended for through-hole mounting only. It is not compatible with SMT reflow profiles or pick-and-place equipment. For surface-mount equivalents, consider the MMSZ47ET1G (SOD-123) or NZ9F47ST5G (SOD-923), though both differ in power rating and impedance from the BZX85C47_T50R.
What is the maximum reverse leakage current for BZX85C47_T50R?
The BZX85C47_T50R specifies a maximum reverse leakage current of 0.25 μA at VR = 33 V (70% of nominal Zener voltage), measured at 25°C ambient. This ultra-low leakage ensures minimal quiescent power draw in always-on protection circuits and preserves accuracy in high-impedance reference nodes where the BZX85C47_T50R is deployed.
How does thermal derating apply to BZX85C47_T50R?
The BZX85C47_T50R must be derated linearly at 6.67 mW/°C above 50°C ambient temperature. At 100°C ambient, its usable power drops to 1.0 W − (50 × 6.67 mW) = 666.5 mW. This derating reflects junction-to-ambient thermal resistance and ensures safe operation without exceeding the +200°C maximum junction temperature limit of the BZX85C47_T50R.
Is BZX85C47_T50R RoHS compliant?
Yes - the BZX85C47_T50R is RoHS compliant per ON Semiconductor's product change notification PCN-1701011 and meets EU Directive 2011/65/EU requirements. Lead content is restricted to <1000 ppm, and all six RoHS substances (including Pb, Cd, Hg, Cr⁶⁺, PBB, PBDE) are below threshold limits. Compliance documentation is available upon request for the BZX85C47_T50R.
BZX85C47_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):
- 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_T50R FAQ
1.How can I place an order for BZX85C47_T50R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX85C47_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 BZX85C47_T50R reliable?
The price and inventory of BZX85C47_T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX85C47_T50R is usually 5 days.
3.What payment methods are accepted for BZX85C47_T50R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX85C47_T50R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX85C47_T50R?
BZX85C47_T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX85C47_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 BZX85C47_T50R?
For technical support, including BZX85C47_T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX85C47_T50R requirements.
6.How does Aetrix verify that BZX85C47_T50R is sourced from the original manufacturer or authorized distributors?
All BZX85C47_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 BZX85C47_T50R meets industry standards.
7.What is the process for return or replacement of BZX85C47_T50R?
All BZX85C47_T50R units undergo pre-shipment inspection (PSI). If there is an issue with BZX85C47_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 BZX85C47_T50R part is unused and in its original packaging.
Return procedure for BZX85C47_T50R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX85C47_T50R Tags
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