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Taiwan Semiconductor Corporation BZX85C43 R0G
- Part No.:
- BZX85C43 R0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZX85C43 R0G.pdf
- Description:
- DIODE ZENER 43V 1.3W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:8,270
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Product details
Overview
BZX85C43 R0G from Taiwan Semiconductor is a 43 V ±5% Zener diode in DO-41 package, rated for 1.3 W power dissipation and operating up to +200 °C junction temperature. It provides precise voltage regulation in low-power DC/DC converters, lighting circuits, and adapter reference stages.
For engineers reviewing the BZX85C43 R0G datasheet, BZX85C43 R0G pinout, BZX85C43 R0G application, or BZX85C43 R0G equivalent, key selection criteria include nominal Zener voltage (43 V), test current (50 mA), dynamic impedance (1000 Ω at IZT), leakage current (0.5 µA at 30 V), and hermetically sealed glass DO-41 packaging.
Technical Context
This discrete Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load or input conditions. Its 1.3 W power rating and 130 °C/W junction-to-ambient thermal resistance define thermal limits in PCB-mounted applications.
The device features ±5% tolerance on nominal 43 V Zener voltage, tested at 50 mA with 10 ms pulse, and exhibits 1000 Ω dynamic impedance at that condition. Cathode polarity is marked by a visible band on the DO-41 glass body.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VZ Nominal | 43 V - precise DC reference voltage at 50 mA test current |
| VZ Tolerance | ±5% - ensures 40.0–46.0 V regulation range at 25 °C |
| PD | 1.3 W - maximum continuous power dissipation at 25 °C ambient |
| ZZT | 1000 Ω - dynamic impedance at 50 mA, impacts regulation stability under load transients |
| IR @ VR | 0.5 µA at 30 V - low leakage preserves efficiency in high-impedance bias networks |
| TJ Max | +200 °C - enables operation in thermally demanding industrial environments |
| RθJA | 130 °C/W - defines required PCB copper area and airflow for thermal management |
Pinout & Package
DO-41 axial-leaded glass package with cathode indicated by a single black band. Leads are pure tin-plated and solderable per J-STD-002. Device weight ≈242 mg.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-voltage side in reverse-bias regulation | Connected to circuit ground or lower-potential node during Zener operation |
| Cathode | Reverse-breakdown terminal / regulated output node | Connected to voltage rail requiring stabilization; marked by visible band |
Key Features
| Feature | Design Value |
|---|---|
| Hermetically sealed glass construction | Ensures long-term parameter stability and moisture resistance in harsh environments |
| ±5% VZ tolerance | Reduces need for post-production trimming in voltage reference designs |
| DO-41 mechanical standardization | Enables compatibility with automated axial insertion equipment and legacy board layouts |
| RoHS-compliant materials | Meets global environmental compliance requirements without lead or hazardous substances |
Applications
| Low-Voltage Stabilizers | On-Board DC/DC Converters |
|---|---|
Use Scenario: Providing stable bias voltage for op-amp comparators or microcontroller reset circuits in industrial control modules. IC Role / Device Role / Timing Role: Voltage reference element establishing fixed threshold for logic-level detection. Use Value: 43 V nominal Zener voltage supports mid-range analog sensing interfaces where higher reference voltages improve noise immunity. | Use Scenario: Regulating feedback node voltage in isolated flyback or buck-derived auxiliary supplies. IC Role / Device Role / Timing Role: Precision shunt regulator defining output voltage setpoint via optocoupler feedback path. Use Value: 1000 Ω dynamic impedance ensures minimal load-induced drift across line and load variations. |
| Lighting Applications | Adapters |
Use Scenario: Overvoltage clamping and reference generation in LED driver IC feedback loops for constant-current control. IC Role / Device Role / Timing Role: Zener clamp protecting driver IC inputs and setting current-sense reference level. Use Value: 200 °C max junction temperature allows reliable operation near thermally stressed LED heatsinks. | Use Scenario: Secondary-side voltage regulation in wall-mount AC/DC adapters powering consumer electronics. IC Role / Device Role / Timing Role: Shunt regulator maintaining stable 43 V rail for auxiliary logic or communication ICs. Use Value: Hermetic glass seal prevents parameter shift due to humidity ingress in non-hermetic adapter enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4749A | Same 43 V nominal, ±5% tolerance, but rated 1 W (vs. 1.3 W) and DO-41 package | Lower power handling limits use in sustained high-current regulation | Select when thermal margin is sufficient and legacy 1N-series footprint is required |
| BZX55C43 | Same 43 V, ±5%, DO-41, but 500 mW rating and higher ZZT (2 kΩ) | Higher impedance reduces regulation accuracy under dynamic loads | Prefer for cost-sensitive, low-power biasing where precision is secondary |
Compared with 1N4749A and BZX55C43, BZX85C43 R0G delivers higher power capability (1.3 W) and lower dynamic impedance (1000 Ω), making it suitable for applications needing tighter voltage regulation under moderate load variation without derating.
Availability
BZX85C43 R0G is available at Aetrix Electronics and suitable for low-voltage stabilizers, on-board DC/DC converters, and lighting applications requiring stable component supply and RoHS-compliant sourcing.
Supply support for BZX85C43 R0G 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, rectifiers, and Zener diodes for industrial and consumer markets.
The BZX85C series was designed for general-purpose voltage regulation and reference applications where reliability, hermetic sealing, and wide voltage range (3.3–56 V) are critical.
FAQ
What is the Zener voltage tolerance of BZX85C43 R0G?
The BZX85C43 R0G has a nominal Zener voltage of 43 V with a tolerance of ±5%, meaning its actual breakdown voltage falls between 40.0 V and 46.0 V at 25 °C and 50 mA test current. This tolerance is confirmed in the Electrical Specifications table and applies to all units in the production lot.
What is the maximum power dissipation for BZX85C43 R0G?
The BZX85C43 R0G is rated for 1.3 W maximum power dissipation at 25 °C ambient temperature. Derating is required above 25 °C per the thermal resistance specification of 130 °C/W, and the absolute maximum junction temperature is +200 °C.
Is BZX85C43 R0G RoHS compliant?
Yes, BZX85C43 R0G is RoHS compliant, as explicitly stated in the FEATURES section of the official Taiwan Semiconductor datasheet. The device uses lead-free, green compound encapsulation and tin-plated leads meeting J-STD-002 solderability standards.
What package type does BZX85C43 R0G use?
BZX85C43 R0G uses the DO-41 axial-leaded glass package, with cathode polarity indicated by a black band. Mechanical dimensions, lead plating (pure tin), and weight (≈242 mg) are fully specified in the Mechanical Data section of the datasheet.
What is the Zener impedance of BZX85C43 R0G at its test current?
The dynamic impedance (ZZT) of BZX85C43 R0G is 1000 Ω at the specified test current of 50 mA. This value reflects the small-signal AC resistance in reverse breakdown and directly affects voltage regulation accuracy under varying load conditions.
BZX85C43 R0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 43 V
- Tolerance:
- ±5%
- Power - Max:
- 1.3 W
- Impedance (Max) (Zzt):
- 50 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 30 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 10 mA
- Operating Temperature:
- -65°C ~ 200°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
BZX85C43 R0G FAQ
1.How can I place an order for BZX85C43 R0G through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX85C43 R0G 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 BZX85C43 R0G reliable?
The price and inventory of BZX85C43 R0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX85C43 R0G is usually 5 days.
3.What payment methods are accepted for BZX85C43 R0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX85C43 R0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX85C43 R0G?
BZX85C43 R0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX85C43 R0G 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 BZX85C43 R0G?
For technical support, including BZX85C43 R0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX85C43 R0G requirements.
6.How does Aetrix verify that BZX85C43 R0G is sourced from the original manufacturer or authorized distributors?
All BZX85C43 R0G 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 BZX85C43 R0G meets industry standards.
7.What is the process for return or replacement of BZX85C43 R0G?
All BZX85C43 R0G units undergo pre-shipment inspection (PSI). If there is an issue with BZX85C43 R0G, 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 BZX85C43 R0G part is unused and in its original packaging.
Return procedure for BZX85C43 R0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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