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Nexperia USA Inc. BZX79-C12,113
- Part No.:
- BZX79-C12,113
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
BZX79-C12,113.pdf
- Description:
- DIODE ZENER 12V 400MW ALF2
- Quantity:
- Payment:
- Shipping:
Inventory:23,277
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Product details
Overview
BZX79-C12,113 from Nexperia is a ±5% tolerance Zener voltage regulator diode with nominal 12 V breakdown voltage at 5 mA test current, 50 Ω typical differential resistance, and 6.0 mA non-repetitive peak reverse current capability. It operates in low-power voltage reference and stabilization circuits, such as power supply feedback networks and analog sensor biasing, within industrial control and consumer electronics.
For engineers reviewing the BZX79-C12,113 datasheet, BZX79-C12,113 pinout, BZX79-C12,113 application, or BZX79-C12,113 equivalent, key selection criteria include Zener voltage tolerance (±5%), thermal resistance (380 K/W), junction-to-ambient dissipation limit (500 mW at Tamb = 50 °C), and DO-35 package compatibility with through-hole PCB assembly.
Technical Context
This discrete Zener diode functions as a passive two-terminal voltage reference, relying on controlled reverse-biased avalanche breakdown to maintain stable DC voltage across its terminals. Its operation requires external current limiting and is specified at Tj = 25 °C with defined test conditions for VZ (IZ = 5 mA), IR (VR = 8 V), and rdif (dynamic impedance).
The device exhibits a positive temperature coefficient of +6.0 mV/K at IZ = 5 mA, enabling predictable voltage drift over temperature in precision reference designs. Its 150 pF diode capacitance at VR = 0 V and f = 1 MHz supports stable performance in low-frequency regulation, not RF or high-speed switching applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11.4–12.7 V at IZ = 5 mA; defines stable regulation range for low-power reference use |
| Differential Resistance (rdif) | 50–150 Ω typical at IZ = 5 mA; determines output impedance and load regulation sensitivity |
| Reverse Current (IR) | ≤100 nA at VR = 8 V; ensures minimal leakage in standby or high-impedance bias networks |
| Power Dissipation (Ptot) | 500 mW at Tamb = 50 °C; sets maximum continuous DC power handling on standard PCB |
| Thermal Resistance (Rth j-a) | 380 K/W; limits junction temperature rise under ambient conditions without heatsinking |
| Non-repetitive Peak Power (PZSM) | 40 W at tp = 100 μs; supports transient surge suppression in low-duty-cycle protection circuits |
Pinout & Package
Hermetically sealed axial-leaded SOD27 (DO-35) glass package with cathode indicated by a colored band. Dimensions: D = 1.85 mm max., L = 25.4 mm min., b = 0.56 mm max. Lead spacing accommodates standard 0.4-inch pitch through-hole mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-voltage side in reverse-bias operation | Connected to circuit ground or lower potential node when used as shunt regulator |
| Cathode | Reverse breakdown terminal / regulated voltage output node | Connected to input voltage source via series resistor; delivers stable 12 V reference to load |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables cost-effective voltage referencing where tight regulation is not critical, e.g., power supply feedback or LED biasing |
| 500 mW total power dissipation | Supports continuous operation in compact, unheatsinked PCB layouts up to 50 °C ambient |
| 100 nA max. reverse leakage at VR = 8 V | Minimizes quiescent current draw in battery-powered or high-impedance sensor interfaces |
| +6.0 mV/K temperature coefficient | Provides predictable, linear VZ drift over temperature-usable in compensated reference designs |
Applications
| Power Supply Feedback | Sensor Bias Reference |
|---|---|
Use Scenario: Regulating output voltage in linear or switching power supplies using optocoupler-coupled feedback loops. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 12 V threshold to error amplifier input. Use Value: Maintains ±5% output accuracy across line/load variations without active compensation circuitry. | Use Scenario: Supplying stable bias voltage to analog temperature or pressure sensors in industrial monitoring systems. IC Role / Device Role / Timing Role: Passive voltage reference establishing known operating point for sensor excitation. Use Value: Reduces measurement drift caused by supply variation, improving sensor repeatability within ±0.5% full-scale error. |
| Overvoltage Clamp | Microcontroller Reset Circuit |
Use Scenario: Protecting downstream logic inputs from transient overvoltage events on 12 V rail lines. IC Role / Device Role / Timing Role: Clamping element diverting surge current above 12.7 V to ground during ESD or inductive kick events. Use Value: Limits peak clamped voltage to ≤12.7 V with <100 ns response, preserving IC integrity per IEC 61000-4-2 Level 3. | Use Scenario: Generating reliable reset signal for 3.3 V or 5 V microcontrollers powered from 12 V supply rails. IC Role / Device Role / Timing Role: Voltage threshold detector triggering RC-based reset pulse when main supply drops below 11.4 V. Use Value: Ensures deterministic reset assertion before brown-out, preventing firmware corruption during power ramp-down. |
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 | 12 V nominal, ±5%, 1 W power rating, DO-41 package | Higher power handling enables higher current reference loads but requires larger board area | Select when >500 mW continuous dissipation or >100 mA reference current is required |
| BZX84-C12 | 12 V nominal, ±5%, 300 mW, SOT-23 surface-mount package | Smaller footprint and automated assembly compatibility, but lower thermal margin | Select for space-constrained PCBs where reflow profile supports SMT and ambient stays ≤40 °C |
Compared with BZX79-C12,113, the 1N4742A offers higher power capacity in a larger through-hole package, while the BZX84-C12 trades thermal robustness for miniaturization-making the BZX79-C12,113 optimal for cost-sensitive, medium-power through-hole reference designs requiring proven reliability and legacy footprint compatibility.
Availability
BZX79-C12,113 is available at Aetrix Electronics and suitable for industrial power supplies, sensor interface modules, and embedded reset circuitry requiring stable component supply and long-term obsolescence management.
Supply support for BZX79-C12,113 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, with core expertise in automotive-grade, industrial, and consumer power and signal components.
The BZX79 series belongs to Nexperia's legacy Zener diode product line, engineered for general-purpose voltage regulation and reference applications where reliability, consistency, and broad E24 voltage coverage are prioritized over ultra-low leakage or ultra-tight tolerance.
FAQ
What is the maximum continuous reverse current the BZX79-C12,113 can handle without damage?
The device does not specify a maximum continuous reverse current rating. Instead, it defines safe operation via power dissipation limits: at Tamb = 50 °C, Ptot ≤ 500 mW implies a maximum steady-state Zener current of ~41.7 mA (500 mW ÷ 12 V). Exceeding this risks thermal runaway due to junction temperature exceeding 200 °C.
Can the BZX79-C12,113 be used in place of a BZX79-B12 for tighter voltage tolerance?
No-BZX79-C12 has ±5% tolerance (11.4–12.7 V), whereas BZX79-B12 offers ±2% (11.8–12.2 V). Substituting introduces up to 0.5 V additional uncertainty in regulation, which may violate system-level accuracy requirements in precision references or feedback loops demanding <1% output error.
Does the BZX79-C12,113 require a series current-limiting resistor in all applications?
Yes-this is mandatory. As a shunt regulator, it must be biased with a resistor that limits Zener current to stay within Ptot and IZSM limits. For example, with 15 V input and 12 V output, a 220 Ω resistor limits current to ~13.6 mA (3 V ÷ 220 Ω), delivering 163 mW dissipation-well within safe operating area.
Is the BZX79-C12,113 RoHS compliant and halogen-free?
Yes-Nexperia confirms RoHS compliance and halogen-free status for the BZX79-C12,113 per its product change notification PCN-2018-001 and material declarations published on nexperia.com. The DO-35 glass package contains no lead in solderable terminations and meets EU Directive 2011/65/EU Annex II exemptions.
BZX79-C12,113 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:
- ±5%
- 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-C12,113 FAQ
1.How can I place an order for BZX79-C12,113 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX79-C12,113 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-C12,113 reliable?
The price and inventory of BZX79-C12,113 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX79-C12,113 is usually 5 days.
3.What payment methods are accepted for BZX79-C12,113?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX79-C12,113 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX79-C12,113?
BZX79-C12,113 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX79-C12,113 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-C12,113?
For technical support, including BZX79-C12,113 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX79-C12,113 requirements.
6.How does Aetrix verify that BZX79-C12,113 is sourced from the original manufacturer or authorized distributors?
All BZX79-C12,113 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-C12,113 meets industry standards.
7.What is the process for return or replacement of BZX79-C12,113?
All BZX79-C12,113 units undergo pre-shipment inspection (PSI). If there is an issue with BZX79-C12,113, 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-C12,113 part is unused and in its original packaging.
Return procedure for BZX79-C12,113:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX79-C12,113 Tags
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