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Nexperia USA Inc. BZX79-C9V1,133
- Part No.:
- BZX79-C9V1,133
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
BZX79-C9V1,133.pdf
- Description:
- DIODE ZENER 9.1V 400MW ALF2
- Quantity:
- Payment:
- Shipping:
Inventory:8,821
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Product details
Overview
BZX79-C9V1,133 from Nexperia is a ±5% tolerance Zener voltage regulator diode in a hermetically sealed SOD27 (DO-35) glass package, rated for 9.1 V nominal Zener voltage at 6 V reverse bias, with 500 mW total power dissipation and 3.0 A non-repetitive peak reverse current. It serves as a low-power voltage reference in linear regulators and overvoltage protection circuits for consumer power supplies.
For engineers reviewing the BZX79-C9V1,133 datasheet, BZX79-C9V1,133 pinout, BZX79-C9V1,133 application, or BZX79-C9V1,133 equivalent, this page delivers verified electrical parameters, thermal resistance data, differential resistance, temperature coefficient, and real-world use context for precision analog design and board-level stabilization.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified Zener voltage of 8.92–9.28 V at IZtest = 6 mA, exhibiting a typical differential resistance of 40–100 Ω and a positive temperature coefficient of +3.8 to +7.0 mV/K. Its junction-to-ambient thermal resistance is 380 K/W under standard PCB mounting conditions.
Designed for stable DC voltage referencing, it features low reverse leakage (500 nA at VR = 6 V), 150 pF capacitance at 0 V bias and 1 MHz, and supports non-repetitive surge handling up to 40 W for 100 μs pulses-enabling robust transient suppression in compact analog signal chains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.92–9.28 V at IZ = 6 mA - defines precise regulation point for feedback networks |
| Power Dissipation (Ptot) | 500 mW at Tamb = 50 °C - sets maximum continuous thermal load on PCB |
| Differential Resistance (rdif) | 40–100 Ω - determines output impedance and load regulation sensitivity |
| Temperature Coefficient (SZ) | +3.8 to +7.0 mV/K - quantifies voltage drift per degree Celsius rise in junction temperature |
| Reverse Leakage (IR) | 500 nA at VR = 6 V - ensures minimal quiescent current in high-impedance reference paths |
| Diode Capacitance (Cd) | 150 pF at f = 1 MHz, VR = 0 V - impacts high-frequency noise coupling and stability in feedback loops |
| Non-repetitive Peak Current (IZSM) | 3.0 A for tp = 100 μs - enables short-duration surge clamping without device failure |
Pinout & Package
Hermetically sealed axial-leaded SOD27 (DO-35) glass package with cathode indicated by a black band. Dimensions: D = 4.25 mm max., L = 25.4 mm min., b = 0.56 mm max., G1 = 1.85 mm max. Lead spacing accommodates standard through-hole PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side reference node | Connected to ground or lower potential in shunt regulator configuration |
| Cathode | Zener breakdown terminal / regulated output node | Connected to input via current-limiting resistor; provides stable 9.1 V reference |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables cost-effective voltage referencing where tight regulation is not critical |
| Hermetic glass SOD27 package | Ensures long-term reliability and moisture resistance in industrial environments |
| Low 500 nA reverse leakage at 6 V | Minimizes error in high-impedance voltage divider and sensing applications |
| 40–100 Ω differential resistance | Provides predictable load regulation behavior in shunt-based feedback designs |
| Positive temperature coefficient (+3.8 to +7.0 mV/K) | Allows predictable compensation when paired with negative-coefficient components |
Applications
| AC/DC Adapter Reference | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Provides stable 9.1 V reference for TL431-based secondary-side feedback in offline flyback converters. IC Role / Device Role / Timing Role: Shunt voltage reference enabling isolated output voltage regulation. Use Value: Maintains ±2% output accuracy across line/load variations due to low rdif and stable VZ. | Use Scenario: Generates clean reset threshold for 3.3 V microcontrollers using resistor-divider and RC timing. IC Role / Device Role / Timing Role: Precision Zener clamp defining reliable brown-out detection level. Use Value: Eliminates false resets during supply transients thanks to low leakage and repeatable breakdown. |
| LED Driver Current Sense | Industrial Sensor Signal Conditioning |
Use Scenario: Sets reference voltage for constant-current LED driver ICs like LM3404. IC Role / Device Role / Timing Role: Stable voltage node for current-sense amplifier biasing. Use Value: Ensures consistent LED brightness across temperature via predictable SZ behavior. | Use Scenario: Supplies excitation voltage for resistive bridge sensors in PLC analog input modules. IC Role / Device Role / Timing Role: Low-noise, low-drift reference source for instrumentation amplifiers. Use Value: Reduces measurement offset drift by limiting reference voltage temperature dependence. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX79-B9V1,113 | ±2% tolerance (8.92–9.28 V), lower rdif (40–60 Ω), higher test current (5 mA) | Better regulation accuracy and lower dynamic impedance for precision references | Select when tighter voltage tolerance and improved load regulation are required |
| 1N4739A | 9.1 V nominal, ±5%, Ptot = 1 W, DO-41 package, rdif ≈ 8 Ω | Higher power rating and lower impedance but larger footprint and different thermal profile | Select when higher surge capability or lower dynamic impedance is prioritized over size |
Compared with BZX79-C9V1,133, the BZX79-B9V1,113 offers tighter tolerance and lower impedance for precision feedback, while the 1N4739A trades smaller SOD27 size for higher power and lower rdif-making each suitable for distinct trade-offs between accuracy, space, and thermal margin.
Availability
BZX79-C9V1,133 is available at Aetrix Electronics and suitable for AC/DC adapter reference, microcontroller reset circuit, and industrial sensor signal conditioning requiring stable component supply, consistent parametric performance, and long-term obsolescence resilience.
Supply support for BZX79-C9V1,133 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 leader in discrete, logic, and PowerMOS semiconductors, serving automotive, industrial, computing, and consumer markets with high-volume, high-reliability components.
The BZX79 series belongs to Nexperia's standard Zener diode product line, engineered for cost-sensitive, low-power voltage regulation and reference applications where proven reliability and E24-standard voltage selection are essential.
FAQ
What is the maximum continuous power dissipation for BZX79-C9V1,133?
The BZX79-C9V1,133 has a maximum total power dissipation of 500 mW at ambient temperature ≤ 50 °C with standard PCB mounting (lead length ≤ 8 mm). Derating is required above 50 °C at 4.2 mW/°C based on its 380 K/W thermal resistance.
How does the temperature coefficient affect regulation accuracy?
With a typical temperature coefficient of +3.8 to +7.0 mV/K, the BZX79-C9V1,133's Zener voltage increases predictably with junction temperature-enabling compensation in multi-component references but requiring thermal management in high-accuracy systems operating beyond 25 °C.
Can BZX79-C9V1,133 be used in place of BZX79-B9V1,113?
Yes, electrically interchangeable in most shunt regulator applications, but the BZX79-C9V1,133 has ±5% tolerance versus ±2% for the B-series part-resulting in wider VZ spread (8.5–9.6 V vs. 8.92–9.28 V) and slightly higher differential resistance, affecting regulation precision.
What is the cathode marking convention on the SOD27 package?
The cathode is marked by a single black band near one end of the glass body. When mounted on PCB, the banded lead connects to the higher-potential node (e.g., input side of current-limiting resistor), while the unbanded anode connects to ground or return path.
BZX79-C9V1,133 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 9.1 V
- Tolerance:
- ±5%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 6 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- ALF2
BZX79-C9V1,133 FAQ
1.How can I place an order for BZX79-C9V1,133 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX79-C9V1,133 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 BZX79-C9V1,133 reliable?
The price and inventory of BZX79-C9V1,133 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX79-C9V1,133 is usually 5 days.
3.What payment methods are accepted for BZX79-C9V1,133?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX79-C9V1,133 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX79-C9V1,133?
BZX79-C9V1,133 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX79-C9V1,133 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 BZX79-C9V1,133?
For technical support, including BZX79-C9V1,133 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX79-C9V1,133 requirements.
6.How does Aetrix verify that BZX79-C9V1,133 is sourced from the original manufacturer or authorized distributors?
All BZX79-C9V1,133 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 BZX79-C9V1,133 meets industry standards.
7.What is the process for return or replacement of BZX79-C9V1,133?
All BZX79-C9V1,133 units undergo pre-shipment inspection (PSI). If there is an issue with BZX79-C9V1,133, 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 BZX79-C9V1,133 part is unused and in its original packaging.
Return procedure for BZX79-C9V1,133:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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