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Nexperia USA Inc. BZV85-C3V9,133
- Part No.:
- BZV85-C3V9,133
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZV85-C3V9,133.pdf
- Description:
- DIODE ZENER 3.9V 1.3W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:4,944
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Product details
Overview
BZV85-C3V9,133 from Nexperia is a medium-power Zener voltage regulator diode in a hermetically sealed SOD66 (DO-41) glass package, rated for 3.9 V nominal stabilization at 10 mA test current, with ±5 % tolerance, 15 Ω typical differential resistance, and −3.5 to −1.0 mV/K temperature coefficient. It delivers stable reference voltage in low-to-medium power linear regulation circuits, such as power supply feedback networks and precision biasing in industrial sensor interfaces.
For engineers reviewing the BZV85-C3V9,133 datasheet, BZV85-C3V9,133 pinout, BZV85-C3V9,133 application, or BZV85-C3V9,133 equivalent, this page provides verified electrical parameters, thermal behavior under PCB mounting conditions, cathode/anode polarity confirmation, and validated alternatives for voltage reference design continuity.
Technical Context
This Zener diode operates in reverse breakdown mode with a nominal working voltage of 3.9 V (3.7–4.1 V range), optimized for stabilization at 10 mA test current. Its negative temperature coefficient (−3.5 to −1.0 mV/K) enables predictable drift compensation in temperature-sensitive analog circuits.
Thermal performance is defined by junction-to-tie-point resistance of 110 K/W (lead length 4 mm) and junction-to-ambient resistance of 175 K/W (lead length 10 mm). Non-repetitive peak reverse power dissipation reaches 60 W for 100 µs pulses, supporting transient surge suppression in regulated DC rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage (VZ) | 3.7–4.1 V at 10 mA - defines stable regulation band for low-voltage reference applications |
| Differential Resistance (rdif) | 15 Ω max - determines output impedance and load regulation sensitivity |
| Temperature Coefficient (SZ) | −3.5 to −1.0 mV/K - enables predictable thermal drift modeling in precision circuits |
| Total Power Dissipation (Ptot) | 1.3 W max on PCB with 1 cm² copper per lead - sets continuous DC power handling limit |
| Non-repetitive Peak Power (PZSM) | 60 W for 100 µs square wave - supports short-duration overvoltage clamping |
| Forward Voltage (VF) | ≤1 V at 50 mA - ensures low-loss forward conduction when used bidirectionally |
| Reverse Current (IR) | ≤1950 µA at VR = 1 V - quantifies leakage impact on high-impedance bias networks |
Pinout & Package
Hermetically sealed axial-leaded SOD66 (DO-41) glass package with 2.6 mm body diameter and 25.4 mm overall length; cathode identified by a single dark band on the glass envelope.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (banded end) | Cathode | Connected to regulated output node; reverse-biased during Zener operation |
| 2 (non-banded end) | Anode | Connected to ground or lower-potential rail; establishes reference polarity |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass sealing | Ensures long-term parameter stability and moisture resistance in harsh environments |
| E24 ±5 % voltage tolerance | Enables cost-effective selection across 33 standard Zener voltages without custom calibration |
| 1.3 W continuous power rating | Supports direct replacement of legacy 1 W Zeners while improving thermal margin on PCB |
| 15 Ω differential resistance | Minimizes output voltage variation under ±10 mA load shifts in feedback loops |
| Negative temperature coefficient | Allows predictable drift compensation when paired with positive-TC components |
Applications
| Power Supply Feedback | Sensor Bias Reference |
|---|---|
Use Scenario: Regulating output voltage in discrete linear power supplies using TL431-like topology with external pass transistor. IC Role / Device Role / Timing Role: Zener reference element setting error amplifier threshold in feedback divider network. Use Value: 3.9 V nominal voltage matches common 5 V rail sensing requirements while maintaining <±5 % accuracy over temperature. |
Use Scenario: Providing stable bias voltage to bridge-based pressure sensors in industrial transmitters. IC Role / Device Role / Timing Role: Low-drift voltage reference for excitation of Wheatstone bridge elements. Use Value: −3.5 to −1.0 mV/K temperature coefficient enables predictable offset correction in analog signal chains. |
| Overvoltage Clamp | Microcontroller Reset Circuit |
Use Scenario: Protecting 3.3 V I/O pins against ESD or inductive kickback in motor control boards. IC Role / Device Role / Timing Role: Transient voltage suppressor clamping reverse surges above 3.9 V. Use Value: 60 W non-repetitive peak power rating handles 100 µs transients without degradation. |
Use Scenario: Generating clean reset signal for ARM Cortex-M microcontrollers during brown-out events. IC Role / Device Role / Timing Role: Threshold detector in RC-based reset generator with hysteresis. Use Value: 1950 µA max reverse leakage at 1 V ensures reliable discharge path for timing capacitor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4728A | 3.3 V nominal, 5 % tolerance, 1 W Ptot, DO-41 package | Lower voltage and reduced power rating limit use in 3.9 V–5 V feedback paths | Select only if system requires exact 3.3 V reference and thermal budget is constrained to ≤1 W |
| BZX55-C3V9 | Same 3.9 V rating but 500 mW Ptot, higher rdif (20 Ω), same DO-41 package | Insufficient power headroom for sustained 10 mA operation in warm ambient conditions | Acceptable only for low-duty-cycle biasing where average power remains below 0.5 W |
Compared with 1N4728A and BZX55-C3V9, BZV85-C3V9,133 offers superior thermal capability (1.3 W vs. ≤1 W), tighter differential resistance (15 Ω vs. ≥20 Ω), and verified stability under PCB-mounted thermal conditions-making it preferred for continuous-duty industrial regulation.
Availability
BZV85-C3V9,133 is available at Aetrix Electronics and suitable for industrial power supply feedback, sensor bias reference, overvoltage clamp, and microcontroller reset circuitry requiring stable component supply and traceable sourcing.
Supply support for BZV85-C3V9,133 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
Nexperia is a global semiconductor expert focused on high-volume, high-reliability logic, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.
The BZV85 series belongs to Nexperia's precision Zener voltage regulator product line, engineered for stable DC voltage reference and clamping in cost-sensitive, thermally demanding applications.
FAQ
What is the maximum continuous reverse current for BZV85-C3V9,133 at 25 °C?
The device is rated for 10 mA test current (Itest) at nominal Zener voltage, with absolute maximum forward current of 500 mA. Continuous reverse current must be limited to maintain junction temperature below 200 °C; at 25 °C ambient and 1.3 W dissipation, this corresponds to ≤333 mA at 3.9 V, though practical designs typically operate ≤20 mA for long-term reliability.
How does the temperature coefficient affect regulation accuracy over −40 °C to +125 °C?
With a specified SZ of −3.5 to −1.0 mV/K, the Zener voltage shifts approximately −270 mV to −75 mV across a 75 K temperature span. This results in a total regulation drift of −6.9 % to −1.9 % relative to 3.9 V, requiring compensation in high-accuracy systems via resistor networks or complementary TC components.
Can BZV85-C3V9,133 replace BZX79-C3V9 in existing PCB layouts?
Yes-both use DO-41 (SOD66) packaging with identical lead spacing and cathode band marking. BZV85-C3V9,133 offers higher power rating (1.3 W vs. 0.4 W), lower differential resistance (15 Ω vs. 90 Ω), and improved thermal resistance, enabling direct drop-in replacement where board layout and thermal copper area support the increased dissipation.
What is the recommended PCB layout for optimal thermal performance?
Mount with ≥1 cm² copper area per lead, extending at least 10 mm beyond the package body. Use thermal relief pads for soldering and avoid narrow traces between leads and copper pours. For continuous 1.3 W operation, add internal ground plane connections and minimize adjacent heat sources to maintain Tj < 150 °C.
BZV85-C3V9,133 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3.9 V
- Tolerance:
- ±5%
- Power - Max:
- 1.3 W
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 50 mA
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-41
BZV85-C3V9,133 FAQ
1.How can I place an order for BZV85-C3V9,133 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZV85-C3V9,133 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 BZV85-C3V9,133 reliable?
The price and inventory of BZV85-C3V9,133 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZV85-C3V9,133 is usually 5 days.
3.What payment methods are accepted for BZV85-C3V9,133?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZV85-C3V9,133 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZV85-C3V9,133?
BZV85-C3V9,133 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZV85-C3V9,133 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 BZV85-C3V9,133?
For technical support, including BZV85-C3V9,133 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZV85-C3V9,133 requirements.
6.How does Aetrix verify that BZV85-C3V9,133 is sourced from the original manufacturer or authorized distributors?
All BZV85-C3V9,133 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 BZV85-C3V9,133 meets industry standards.
7.What is the process for return or replacement of BZV85-C3V9,133?
All BZV85-C3V9,133 units undergo pre-shipment inspection (PSI). If there is an issue with BZV85-C3V9,133, 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 BZV85-C3V9,133 part is unused and in its original packaging.
Return procedure for BZV85-C3V9,133:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZV85-C3V9,133 Tags
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