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Nexperia USA Inc. BZX79-B12,113
- Part No.:
- BZX79-B12,113
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
BZX79-B12,113.pdf
- Description:
- DIODE ZENER 12V 400MW ALF2
- Quantity:
- Payment:
- Shipping:
Inventory:9,724
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Product details
Overview
BZX79-B12,113 from Nexperia is a ±2% tolerance Zener voltage regulator diode in a hermetically sealed SOD27 (DO-35) glass package, rated for 12 V nominal working voltage at 5 mA test current, 500 mW total power dissipation at 50 °C ambient, and 100 nA reverse current at 8 V reverse bias. It serves as a precision low-power voltage reference in analog signal conditioning and power rail stabilization circuits.
For engineers reviewing the BZX79-B12,113 datasheet, BZX79-B12,113 pinout, BZX79-B12,113 application, or BZX79-B12,113 equivalent, this part is selected for stable 12 V reference generation in space-constrained linear regulators, sensor biasing networks, and overvoltage protection clamps where ±2% initial tolerance and low temperature coefficient (6.0 mV/K typical) are critical.
Technical Context
The BZX79-B12,113 operates as a silicon planar Zener diode with avalanche breakdown mechanism above 6 V, exhibiting a typical differential resistance of 50 Ω at 5 mA and a positive temperature coefficient of +6.0 mV/K. Its junction-to-ambient thermal resistance is 380 K/W under standard PCB mounting conditions.
Designed for DC voltage regulation, it delivers stable reverse-biased conduction with non-repetitive peak reverse power dissipation up to 40 W for 100 μs pulses, and supports continuous forward current up to 250 mA. Reverse leakage remains ≤100 nA at VR = 8 V, ensuring minimal quiescent current draw in reference circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 12 V at IZ = 5 mA - defines precise DC reference level for feedback or biasing |
| Initial Tolerance | ±2% - ensures tight voltage accuracy without post-manufacturing trimming |
| Total Power Dissipation | 500 mW at Tamb = 50 °C - sets maximum steady-state thermal load on PCB layout |
| Differential Resistance | 50 Ω max at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Reverse Current | ≤100 nA at VR = 8 V - guarantees negligible current drain in high-impedance reference nodes |
| Temperature Coefficient | +6.0 mV/K typical - enables predictable drift compensation in temperature-stable designs |
| Package | SOD27 (DO-35) - axial-leaded hermetic glass package compatible with through-hole reflow and manual assembly |
Pinout & Package
Hermetically sealed axial-leaded SOD27 (DO-35) glass package with cathode indicated by a band; leads are tinned copper alloy, suitable for wave soldering and hand assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node | Connected to circuit common when used in reverse-biased Zener mode; carries full forward current up to 250 mA |
| Cathode | Zener breakdown terminal / Regulated output node | Provides stabilized 12 V output when reverse-biased; marked by colored band per JEDEC DO-35 standard |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables direct use in precision references without calibration or trimming |
| 500 mW power rating at 50 °C ambient | Supports robust operation in compact industrial control PCBs without forced cooling |
| Low 100 nA reverse leakage at 8 V | Minimizes error in high-impedance voltage divider and op-amp reference inputs |
| Hermetic SOD27 glass package | Ensures long-term reliability in humid or chemically aggressive environments |
| Non-repetitive 40 W surge capability | Withstands transient overvoltage events such as ESD or inductive kickback without degradation |
Applications
| Industrial Sensor Signal Conditioning | Microcontroller Power Rail Clamp |
|---|---|
Use Scenario: Stabilizing excitation voltage for resistive bridge sensors in PLC analog input modules. IC Role / Device Role / Timing Role: Zener reference diode providing fixed 12 V bias to Wheatstone bridge, operating in reverse breakdown mode. Use Value: ±2% tolerance and +6.0 mV/K tempco allow <±0.5% total error across −40 °C to +85 °C ambient range. | Use Scenario: Clamping 12 V supply rail to protect MCU I/O pins during hot-swap or load dump events. IC Role / Device Role / Timing Role: Transient voltage suppressor limiting rail excursion to 12.6 V during 100 μs surges. Use Value: 40 W non-repetitive peak power rating absorbs 400 mJ pulses without failure per IEC 61000-4-5 Level 3. |
| Linear Voltage Regulator Feedback | Automotive Body Control Module Reference |
Use Scenario: Setting output voltage of discrete NPN pass transistor regulator in battery-powered instrumentation. IC Role / Device Role / Timing Role: Precision shunt reference connected between pass transistor base and regulated output. Use Value: 50 Ω differential resistance ensures <10 mV output shift under 200 mA load step, maintaining regulation stability. | Use Scenario: Providing stable 12 V reference for window lift motor current sensing in 12 V automotive systems. IC Role / Device Role / Timing Role: Zener diode referenced to chassis ground, feeding ADC input via resistor divider. Use Value: Hermetic SOD27 package withstands 1000+ hours salt spray per ISO 16750-4, ensuring field reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4742A | ±5% tolerance, 12 V nominal, 1 W power rating in DO-41 package | Higher power but looser tolerance; requires larger PCB footprint | Select when higher surge energy handling is needed and ±5% accuracy is acceptable |
| BZX84-C12 | SOT-23 surface-mount package, ±5% tolerance, 300 mW rating | Not pin-compatible; requires redesign for space-constrained PCBs | Select only for automated SMT production where board area is critical and tolerance relaxation is permitted |
Compared with 1N4742A and BZX84-C12, the BZX79-B12,113 offers tighter ±2% tolerance and hermetic reliability in a compact through-hole package-ideal for legacy industrial designs requiring long-term calibration stability without SMT conversion.
Availability
BZX79-B12,113 is available at Aetrix Electronics and suitable for industrial sensor conditioning, microcontroller rail clamping, and linear regulator feedback requiring stable component supply across extended product lifecycles.
Supply support for BZX79-B12,113 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, formed in 2017 from the former NXP Standard Products business, with focus on automotive, industrial, computing, and consumer markets.
The BZX79 series belongs to Nexperia's precision Zener diode product line, engineered specifically for low-power voltage regulation and reference applications demanding tight tolerance, hermetic reliability, and proven long-term stability.
FAQ
What is the maximum continuous power dissipation for BZX79-B12,113?
The BZX79-B12,113 has a maximum total power dissipation of 500 mW at an ambient temperature of 50 °C with standard PCB mounting (lead length ≤8 mm, no metallization pad). At higher ambient temperatures, derating applies per the 380 K/W junction-to-ambient thermal resistance.
Does BZX79-B12,113 have a specified Zener impedance?
Yes-the differential resistance (rdif) is specified as 50 Ω maximum at IZ = 5 mA and 25 °C. This value represents dynamic impedance under regulation and directly affects load regulation performance in shunt reference configurations.
Can BZX79-B12,113 be used in surface-mount designs?
No-it is packaged exclusively in the axial-leaded SOD27 (DO-35) glass case, designed for through-hole mounting. For SMT equivalents, consider the BZX84-C12 (SOT-23) or MMBZ5242B (SOT-23), though both differ in tolerance and power rating.
What is the reverse leakage current specification at 8 V?
At VR = 8 V and Tj = 25 °C, the reverse current (IR) is guaranteed ≤100 nA for the BZX79-B12,113. This low leakage supports high-impedance reference applications such as op-amp bias networks and precision ADC voltage dividers.
BZX79-B12,113 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):
- 12 V
- Tolerance:
- ±2%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 25 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 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-B12,113 FAQ
1.How can I place an order for BZX79-B12,113 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX79-B12,113 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-B12,113 reliable?
The price and inventory of BZX79-B12,113 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX79-B12,113 is usually 5 days.
3.What payment methods are accepted for BZX79-B12,113?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX79-B12,113 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX79-B12,113?
BZX79-B12,113 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX79-B12,113 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-B12,113?
For technical support, including BZX79-B12,113 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX79-B12,113 requirements.
6.How does Aetrix verify that BZX79-B12,113 is sourced from the original manufacturer or authorized distributors?
All BZX79-B12,113 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-B12,113 meets industry standards.
7.What is the process for return or replacement of BZX79-B12,113?
All BZX79-B12,113 units undergo pre-shipment inspection (PSI). If there is an issue with BZX79-B12,113, 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-B12,113 part is unused and in its original packaging.
Return procedure for BZX79-B12,113:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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