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Nexperia USA Inc. BZX79-B30,113
- Part No.:
- BZX79-B30,113
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
BZX79-B30,113.pdf
- Description:
- DIODE ZENER 30V 400MW ALF2
- Quantity:
- Payment:
- Shipping:
Inventory:9,190
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Product details
Overview
BZX79-B30,113 from Nexperia is a ±2% tolerance Zener voltage regulator diode with nominal 30 V breakdown voltage at 2 mA test current, 70 Ω typical differential resistance, and −20.6 mV/K temperature coefficient. It operates as a low-power voltage reference in bias networks, power supply feedback paths, and overvoltage protection circuits, rated for 500 mW total power dissipation at 50 °C ambient.
For engineers reviewing the BZX79-B30,113 datasheet, BZX79-B30,113 pinout, BZX79-B30,113 application, or BZX79-B30,113 equivalent, key selection criteria include Zener voltage tolerance, dynamic impedance, temperature coefficient sign/magnitude, reverse leakage at operating VR, and DO-35 package thermal resistance (Rth j-a = 380 K/W).
Technical Context
This device functions as a two-terminal passive voltage reference relying on controlled reverse-biased Zener breakdown. Its 30 V nominal Zener voltage is specified at IZtest = 2 mA with ±2% tolerance, and exhibits a negative temperature coefficient of −20.6 mV/K - indicating decreasing VZ with rising junction temperature.
Designed for low-current stabilization, it delivers stable regulation under DC or low-frequency transient conditions, with non-repetitive peak reverse power dissipation up to 40 W for 100 μs pulses and reverse leakage limited to 1.0 μA at VR = 28 V (0.7 × VZnom).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 29.4 V to 30.6 V at IZ = 2 mA - ensures tight DC reference accuracy in feedback loops |
| Differential Resistance (rdif) | 70 Ω typical at IZ = 2 mA - determines load regulation error under varying current |
| Temperature Coefficient (SZ) | −20.6 mV/K at IZ = 2 mA - quantifies VZ drift with temperature; negative sign indicates downward drift |
| Reverse Leakage (IR) | 1.0 μA max at VR = 28 V (0.7 × VZnom) - defines minimum quiescent current in high-impedance reference nodes |
| Total Power Dissipation (Ptot) | 500 mW at Tamb = 50 °C - sets maximum continuous DC power handling on standard PCB |
| Junction-to-Ambient Rth | 380 K/W - determines steady-state temperature rise above ambient per watt dissipated |
Pinout & Package
Hermetically sealed glass axial-leaded SOD27 (DO-35) package with cathode indicated by a colored band. Device has two terminals: anode and cathode - no internal circuitry or active control logic.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener reference ground node | Connected to circuit ground or lower-potential rail; establishes reference polarity |
| Cathode | Zener breakdown terminal / regulated output node | Connected to voltage to be stabilized; reverse-biased to maintain fixed VZ drop |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables precise voltage setting without post-production trimming in analog references |
| Low differential resistance (70 Ω typ.) | Minimizes output voltage variation across ±1 mA load current changes in shunt regulators |
| Negative temperature coefficient (−20.6 mV/K) | Allows predictable compensation when paired with positive-TC components in temperature-stable references |
| Hermetic glass SOD27 package | Ensures long-term parameter stability and moisture resistance in industrial environments |
Applications
| Power Supply Feedback Reference | Overvoltage Clamp Protection |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback or buck-derived DC-DC converters using optocoupler feedback. IC Role / Device Role / Timing Role: Zener diode provides precise 30 V reference at optocoupler LED anode, enabling accurate secondary-side voltage sensing. Use Value: Tight ±2% VZ tolerance directly translates to <±1% output voltage regulation accuracy under line/load transients. | Use Scenario: Protecting microcontroller I/O pins or sensor inputs from ESD-induced voltage spikes exceeding 30 V. IC Role / Device Role / Timing Role: Acts as passive shunt clamp, conducting only when input exceeds 30 V + forward drop of series resistor. Use Value: 1.0 μA max reverse leakage at 28 V ensures negligible standby current draw in always-on monitoring circuits. |
| Low-Power Bias Network Reference | Current Source Setpoint |
Use Scenario: Establishing stable gate bias for high-side MOSFET drivers in battery-powered instrumentation. IC Role / Device Role / Timing Role: Provides fixed 30 V reference to set gate-source voltage of depletion-mode FETs in constant-current sources. Use Value: −20.6 mV/K temperature coefficient enables predictable offset correction when combined with matched resistors. | Use Scenario: Setting reference voltage for LM334-based adjustable current sources in sensor excitation circuits. IC Role / Device Role / Timing Role: Supplies stable 30 V node to define ISET = VREF/RSET, independent of supply ripple. Use Value: 70 Ω rdif limits current source error to <2% over 0–10 mA output range due to VZ droop. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4745A | 30 V nominal, ±5% tolerance, 35 Ω rdif, +11 mV/K SZ, DO-41 package | Higher leakage (50 μA @ 23.4 V), larger footprint, positive TC unsuitable for temp-compensated designs | Select only if cost sensitivity outweighs precision and thermal stability requirements |
| BZX84-C30 | 30 V nominal, ±5% tolerance, SOT-23 surface-mount, 90 Ω rdif, −19 mV/K SZ | Lower Ptot (300 mW), smaller thermal mass, unsuitable for through-hole prototyping or high-surge environments | Choose for space-constrained PCBs where reflow compatibility and board density are critical |
Compared with BZX79-B30,113, the 1N4745A trades tighter rdif for looser tolerance and opposite temperature behavior, while BZX84-C30 sacrifices power handling and lead-form factor for miniaturization - neither matches its combination of ±2% tolerance, hermetic reliability, and DO-35 thermal performance.
Availability
BZX79-B30,113 is available at Aetrix Electronics and suitable for power supply feedback references, overvoltage clamp protection, and low-power bias network references requiring stable component supply across industrial, computing, and consumer design cycles.
Supply support for BZX79-B30,113 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 legacy Zener diode product line, engineered for precision voltage regulation in cost-sensitive, high-reliability linear power and protection applications.
FAQ
What is the maximum continuous reverse current this diode can handle?
The BZX79-B30,113 has no specified maximum continuous reverse current rating. Its safe operating limit is defined by power dissipation: at 50 °C ambient, maximum continuous Zener current is 16.7 mA (500 mW ÷ 30 V). Exceeding this causes junction overheating beyond 200 °C absolute maximum.
Can this diode be used in AC signal clipping applications?
Yes - its symmetrical forward voltage (~0.9 V at 10 mA) and sharp 30 V reverse breakdown enable bidirectional clipping. However, differential resistance (70 Ω) causes nonlinear distortion above ~5 mA; best suited for low-level signal limiting where harmonic content is not critical.
How does the −20.6 mV/K temperature coefficient affect long-term stability?
This coefficient means VZ decreases by ~0.62 V over a 30 °C junction temperature rise (e.g., from 25 °C to 55 °C). In open-loop references, this introduces ~2% error; in compensated designs, it allows matching with positive-TC resistors to achieve <100 ppm/°C stability.
Is the SOD27 package compatible with wave soldering processes?
Yes - the hermetic glass SOD27 package withstands standard wave soldering profiles (peak 260 °C for ≤5 s) per Nexperia's mounting instructions. Lead spacing (25.4 mm) and axial geometry ensure reliable wetting; thermal shock resistance is validated for >1000 cycles between −65 °C and +200 °C.
BZX79-B30,113 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 30 V
- Tolerance:
- ±2%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 21 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-B30,113 FAQ
1.How can I place an order for BZX79-B30,113 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX79-B30,113 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-B30,113 reliable?
The price and inventory of BZX79-B30,113 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX79-B30,113 is usually 5 days.
3.What payment methods are accepted for BZX79-B30,113?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX79-B30,113 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX79-B30,113?
BZX79-B30,113 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX79-B30,113 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-B30,113?
For technical support, including BZX79-B30,113 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX79-B30,113 requirements.
6.How does Aetrix verify that BZX79-B30,113 is sourced from the original manufacturer or authorized distributors?
All BZX79-B30,113 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-B30,113 meets industry standards.
7.What is the process for return or replacement of BZX79-B30,113?
All BZX79-B30,113 units undergo pre-shipment inspection (PSI). If there is an issue with BZX79-B30,113, 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-B30,113 part is unused and in its original packaging.
Return procedure for BZX79-B30,113:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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