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Nexperia USA Inc. BZX79-B24,113
- Part No.:
- BZX79-B24,113
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
BZX79-B24,113.pdf
- Description:
- DIODE ZENER 24V 400MW ALF2
- Quantity:
- Payment:
- Shipping:
Inventory:8,970
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Product details
Overview
BZX79-B24,113 from Nexperia is a ±2% tolerance Zener voltage regulator diode with nominal 24 V regulation at 5 mA, 60 Ω typical differential resistance, and −65 °C to +200 °C junction temperature range. It operates as a low-power voltage reference in bias networks, power supply feedback paths, and overvoltage protection circuits.
For engineers reviewing the BZX79-B24,113 datasheet, BZX79-B24,113 pinout, BZX79-B24,113 application, or BZX79-B24,113 equivalent, key selection criteria include Zener voltage tolerance (±2%), thermal resistance (380 K/W), non-repetitive peak reverse current (1.25 A), and DO-35 package compatibility with through-hole PCB assembly.
Technical Context
This device functions as a two-terminal silicon Zener diode operating in reverse breakdown mode. Its regulation is defined at IZtest = 5 mA, with a temperature coefficient of +15.9 mV/K (typical) and differential resistance of 60 Ω (max) at that condition.
The SOD27 (DO-35) hermetically sealed glass package enables stable operation up to 200 °C junction temperature. Thermal resistance from junction to ambient is 380 K/W under standard mounting conditions (lead length ≤ 8 mm, no metallization pad).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 23.5 V to 24.5 V at IZ = 5 mA - defines precise DC reference point for feedback or clamping |
| Differential Resistance rdif | 60 Ω max at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Temperature Coefficient SZ | +15.9 mV/K typ at IZ = 5 mA - quantifies drift rate per degree Celsius in precision references |
| Reverse Current IR | 50 nA max at VR = 16.8 V - ensures minimal leakage in high-impedance bias networks |
| Non-repetitive Peak IZSM | 1.25 A at tp = 100 μs - supports transient overvoltage suppression without failure |
| Total Power Dissipation Ptot | 500 mW at Tamb = 50 °C - sets maximum continuous DC power handling under standard PCB mount |
| Junction Temperature Range | −65 °C to +200 °C - enables use in automotive under-hood and industrial high-temp environments |
Pinout & Package
Hermetically sealed axial-leaded SOD27 (DO-35) glass package with cathode band marking. Dimensions: D = 1.85 mm max, L = 25.4 mm min, b = 0.56 mm max, G1 = 4.25 mm max.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection | Connected to lower potential node in Zener bias configuration; carries forward current up to 250 mA |
| Cathode | Reverse breakdown terminal / regulated output node | Marked by band; provides stable 24 V reference when reverse-biased above knee voltage |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables tight regulation without post-production trimming in voltage reference designs |
| 500 mW total power dissipation | Supports robust operation in space-constrained linear regulators and protection circuits |
| Hermetic SOD27 (DO-35) package | Ensures long-term parameter stability and moisture resistance in harsh environments |
| −65 °C to +200 °C operating range | Validates suitability for under-hood automotive and industrial control applications |
| Non-repetitive 40 W peak power capability | Allows transient surge absorption in ESD and load-dump protection schemes |
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 24 V reference to TL431 or optocoupler LED anode, setting regulation threshold. Use Value: ±2% tolerance ensures output accuracy within ±1% over line/load/temperature, meeting industrial PSU specs. | Use Scenario: Protecting microcontroller I/O pins from 24 V field bus transients in PLC input modules. IC Role / Device Role / Timing Role: Connected cathode-to-rail, anode-to-ground; clamps spikes exceeding 24.5 V before IC damage occurs. Use Value: 1.25 A non-repetitive peak current rating absorbs 100 μs surges per IEC 61000-4-5 Level 3 without degradation. |
| Bias Network Voltage Reference | Temperature-Stable Sensor Excitation |
Use Scenario: Providing stable bias to op-amp input stages or transistor base networks in analog front-ends. IC Role / Device Role / Timing Role: Supplies fixed 24 V reference to high-impedance divider networks driving amplifier inputs. Use Value: 60 Ω differential resistance minimizes loading error on 100 kΩ+ dividers, preserving gain accuracy. | Use Scenario: Exciting RTD or strain gauge bridges requiring stable excitation voltage in industrial sensors. IC Role / Device Role / Timing Role: Acts as primary voltage source for Wheatstone bridge, with tempco compensated via circuit design. Use Value: +15.9 mV/K tempco is predictable and can be offset in software or hardware, enabling <0.1% drift over −40 to +85 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4749A | 24 V ±5%, 1 W power rating, DO-41 package | Higher power but looser tolerance; requires larger PCB footprint | Select when higher surge energy absorption is needed and ±5% regulation is acceptable |
| BZX84-C24 | 24 V ±5%, SOT-23 surface-mount, 300 mW | Smaller size but lower power and wider tolerance; not hermetically sealed | Select for space-constrained PCBs where reflow compatibility and cost outweigh hermetic reliability needs |
Compared with BZX79-B24,113, the 1N4749A offers higher surge capacity but sacrifices precision and package robustness, while the BZX84-C24 trades hermeticity and power for miniaturization-making the BZX79-B24,113 optimal for stable, through-hole, ±2% reference designs in demanding environments.
Availability
BZX79-B24,113 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, automotive body control module voltage references, and programmable logic controller input protection requiring stable component supply across extended temperature ranges.
Supply support for BZX79-B24,113 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 semiconductors, formed in 2017 from the former NXP Standard Products division, focused on high-volume, high-reliability components for automotive and industrial markets.
The BZX79 series belongs to Nexperia's voltage regulator diode product line, engineered for precision low-power voltage referencing and stabilization in cost-sensitive, high-reliability applications.
FAQ
What is the maximum continuous reverse power dissipation for BZX79-B24,113 at 50 °C ambient?
The maximum continuous reverse power dissipation is 500 mW at Tamb = 50 °C with standard PCB mounting (no metallization pad, lead length ≤ 8 mm). This value drops to 400 mW if mounted without thermal relief, per the Absolute Maximum Ratings table.
How does the temperature coefficient affect regulation accuracy over −40 °C to +125 °C?
With a typical temperature coefficient of +15.9 mV/K, the Zener voltage shifts approximately +2.5 V across this 165 K range. Designers must account for this drift in precision references-either via compensation circuitry or by limiting operating temperature span.
Can BZX79-B24,113 be used in surface-mount designs?
No-it uses a through-hole SOD27 (DO-35) axial package with 25.4 mm minimum lead length and glass body. Surface-mount alternatives include the BZX84-C24 (SOT-23) or MMBZ5249B (SOT-23), though with different tolerances and power ratings.
What is the reverse leakage current at 16.8 V and 25 °C?
The reverse leakage current is guaranteed ≤50 nA at VR = 0.7 × VZnom = 16.8 V and Tj = 25 °C. This low leakage supports high-impedance bias networks without significant error current.
BZX79-B24,113 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):
- 24 V
- Tolerance:
- ±2%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 70 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 16.8 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-B24,113 FAQ
1.How can I place an order for BZX79-B24,113 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX79-B24,113 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-B24,113 reliable?
The price and inventory of BZX79-B24,113 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX79-B24,113 is usually 5 days.
3.What payment methods are accepted for BZX79-B24,113?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX79-B24,113 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX79-B24,113?
BZX79-B24,113 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX79-B24,113 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-B24,113?
For technical support, including BZX79-B24,113 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX79-B24,113 requirements.
6.How does Aetrix verify that BZX79-B24,113 is sourced from the original manufacturer or authorized distributors?
All BZX79-B24,113 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-B24,113 meets industry standards.
7.What is the process for return or replacement of BZX79-B24,113?
All BZX79-B24,113 units undergo pre-shipment inspection (PSI). If there is an issue with BZX79-B24,113, 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-B24,113 part is unused and in its original packaging.
Return procedure for BZX79-B24,113:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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