My Inquiry
My Account
Nexperia USA Inc. BZX79-C3V9,113
- Part No.:
- BZX79-C3V9,113
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
BZX79-C3V9,113.pdf
- Description:
- DIODE ZENER 3.9V 400MW ALF2
- Quantity:
- Payment:
- Shipping:
Inventory:7,024
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX79-C3V9,113 from Nexperia is a ±5% tolerance Zener voltage regulator diode in a hermetically sealed SOD27 (DO-35) glass package, rated for 3.9 V nominal Zener voltage at 5 mA test current, 400–600 Ω differential resistance, and −2.5 mV/K temperature coefficient. It delivers stable low-voltage reference or stabilization in power supply feedback paths, sensor biasing circuits, and overvoltage protection clamps.
For engineers reviewing the BZX79-C3V9,113 datasheet, BZX79-C3V9,113 pinout, BZX79-C3V9,113 application, or BZX79-C3V9,113 equivalent, key selection criteria include Zener voltage tolerance, dynamic impedance, thermal coefficient, reverse leakage at 1 V, and non-repetitive surge capability under 100 μs pulses.
Technical Context
This device operates as a two-terminal passive voltage reference, relying on controlled reverse breakdown in silicon PN junctions. Its Zener mechanism dominates below 5.6 V, yielding predictable, low-noise regulation with minimal dependence on current variation within its specified test range (5 mA).
Thermal behavior is defined by junction-to-ambient thermal resistance of 380 K/W (unmounted leads), and it supports non-repetitive peak reverse power dissipation up to 40 W for 100 μs pulses-critical for transient suppression in low-energy circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.7–4.1 V at IZ = 5 mA; ensures stable reference within ±5% tolerance band for precision biasing |
| Differential Resistance (rdiff) | 400–600 Ω at IZ = 5 mA; defines output impedance affecting regulation accuracy under load variation |
| Temperature Coefficient (SZ) | −2.5 mV/K at IZ = 5 mA; quantifies drift per degree Celsius-critical for temperature-stable references |
| Reverse Leakage (IR) | 3 μA max at VR = 1 V; limits quiescent current in high-impedance sensing or battery-powered circuits |
| Peak Reverse Power (PZSM) | 40 W for tp = 100 μs; enables short-duration transient clamping without failure |
| Total Power Dissipation (Ptot) | 500 mW at Tamb = 50 °C; sets continuous thermal limit for PCB-mounted operation |
| Junction Temperature Range | −65 to +200 °C; supports industrial and automotive ambient extremes without derating |
Pinout & Package
Hermetically sealed axial-leaded SOD27 (DO-35) glass package with cathode indicated by a dark band. Leads are tinned copper-clad steel, suitable for wave or hand soldering. Package dimensions: D = 1.85 mm max, L = 25.4 mm min, b = 0.56 mm max.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-impedance path during forward bias | Connects to lower-potential node in Zener configuration; carries up to 250 mA continuous forward current |
| Cathode | Reverse breakdown terminal / regulated output node | Marked with band; referenced to system ground or feedback point; sustains 3.9 V regulation under reverse bias |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables cost-effective voltage referencing where tight regulation is not required-ideal for consumer-grade power rails |
| Hermetic glass SOD27 package | Provides long-term stability and moisture resistance unmatched by plastic-packaged Zeners |
| Non-repetitive 40 W surge rating | Allows integration into basic ESD/overvoltage protection without external TVS devices |
| Low 3 μA reverse leakage at 1 V | Minimizes standby current in battery-backed sensors and low-power microcontroller reset circuits |
| −2.5 mV/K temperature coefficient | Supports predictable drift compensation in analog front-ends operating across −40 to +85 °C |
Applications
| Power Supply Feedback Reference | Sensor Biasing Network |
|---|---|
Use Scenario: Used in the feedback divider of a 5 V linear regulator to set output voltage via resistive ratio against internal reference. IC Role / Device Role / Timing Role: Passive voltage reference establishing precise DC setpoint for error amplifier comparison. Use Value: Delivers stable 3.9 V reference with <1% drift over 0–70 °C, enabling ±2% output regulation without trimming. | Use Scenario: Biases the bridge excitation input of a strain gauge in a handheld weight scale. IC Role / Device Role / Timing Role: Low-drift, low-current voltage source ensuring consistent sensor sensitivity across temperature. Use Value: 3 μA leakage and −2.5 mV/K TC minimize zero-point drift, improving measurement repeatability to ±0.1% FS. |
| Microcontroller Reset Clamping | Overvoltage Protection Clamp |
Use Scenario: Connected between MCU VDD and ground to clamp supply spikes above 4.1 V during hot-plug events. IC Role / Device Role / Timing Role: Fast-reacting shunt element limiting rail voltage to prevent latch-up or brownout reset corruption. Use Value: 40 W/100 μs surge rating absorbs transient energy without degradation-no need for series resistor in low-current systems. | Use Scenario: Placed across motor driver output to suppress inductive kickback spikes in 12 V brushed DC actuator control. IC Role / Device Role / Timing Role: Passive clamp limiting voltage excursion to 4.1 V, protecting downstream logic-level MOSFET gates. Use Value: Glass-package reliability ensures >100,000 surge cycles without parameter shift-validated for industrial motion control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4729A | 3.6 V nominal, ±5%, 1000 mW Ptot, DO-41 package | Higher power rating but larger footprint; higher leakage (5 μA @ 1 V) | Select when higher continuous dissipation is needed and board space allows DO-41 |
| BZX55-C3V9 | Same 3.9 V ±5%, but SOD-14 (DO-35) variant with 400 mW Ptot and 5 μA leakage | Lower surge rating (25 W) and higher leakage reduce suitability for precision or transient-heavy use | Acceptable only in cost-sensitive, non-critical consumer applications with no surge exposure |
Compared with BZX79-C3V9,113, the 1N4729A offers higher power handling but sacrifices leakage and thermal coefficient performance; the BZX55-C3V9 matches form factor but trades off surge robustness and leakage-making the BZX79-C3V9,113 optimal for precision, low-leakage, and transient-resilient designs.
Availability
BZX79-C3V9,113 is available at Aetrix Electronics and suitable for power supply feedback references, sensor biasing networks, microcontroller reset clamping, and overvoltage protection clamps requiring stable component supply and long-lifecycle support.
Supply support for BZX79-C3V9,113 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-reliability, high-volume components.
The BZX79 series belongs to Nexperia's legacy voltage regulator diode product line, engineered for low-cost, high-stability Zener referencing in space-constrained, thermally demanding applications.
FAQ
What is the maximum continuous reverse current this diode can handle?
The BZX79-C3V9,113 does not specify a maximum continuous reverse current. Its operation relies on maintaining power dissipation ≤500 mW at 50 °C ambient. At 3.9 V, that corresponds to ~128 mA average reverse current-however, sustained operation above 5 mA test current increases differential resistance and temperature drift significantly, so 5–10 mA is typical for stable regulation.
Can this Zener be used in place of a 3.3 V reference?
No-BZX79-C3V9,113 has a nominal Zener voltage of 3.9 V (3.7–4.1 V range), not 3.3 V. Substituting it for a 3.3 V part would raise regulated voltage by ~18%, likely causing overvoltage stress in downstream circuitry. For 3.3 V, use BZX79-C3V3 (3.1–3.5 V) instead.
Is the SOD27 package RoHS compliant and lead-free?
Yes-the SOD27 package used for BZX79-C3V9,113 meets RoHS Directive 2011/65/EU and is lead-free. Nexperia confirms full compliance for this series, including exemption 7a (lead in glass frits) where applicable in hermetic sealing, with lead content <0.1 wt% in homogeneous materials.
How does temperature affect its Zener voltage in real-world operation?
At 5 mA test current, BZX79-C3V9,113 exhibits a temperature coefficient of −2.5 mV/K. Over a −40 to +85 °C range, this produces ≈−313 mV total drift-i.e., Zener voltage drops from ~4.05 V at −40 °C to ~3.74 V at +85 °C. This predictable negative drift must be accounted for in precision analog designs.
BZX79-C3V9,113 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):
- 3.9 V
- Tolerance:
- ±5%
- Power - Max:
- 400 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 1 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-C3V9,113 FAQ
1.How can I place an order for BZX79-C3V9,113 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX79-C3V9,113 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-C3V9,113 reliable?
The price and inventory of BZX79-C3V9,113 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX79-C3V9,113 is usually 5 days.
3.What payment methods are accepted for BZX79-C3V9,113?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX79-C3V9,113 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX79-C3V9,113?
BZX79-C3V9,113 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX79-C3V9,113 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-C3V9,113?
For technical support, including BZX79-C3V9,113 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX79-C3V9,113 requirements.
6.How does Aetrix verify that BZX79-C3V9,113 is sourced from the original manufacturer or authorized distributors?
All BZX79-C3V9,113 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-C3V9,113 meets industry standards.
7.What is the process for return or replacement of BZX79-C3V9,113?
All BZX79-C3V9,113 units undergo pre-shipment inspection (PSI). If there is an issue with BZX79-C3V9,113, 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-C3V9,113 part is unused and in its original packaging.
Return procedure for BZX79-C3V9,113:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX79-C3V9,113 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
