My Inquiry
My Account
Nexperia USA Inc. BZX585-C3V9,115
- Part No.:
- BZX585-C3V9,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX585-C3V9,115.pdf
- Description:
- DIODE ZENER 3.9V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:11,193
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX585-C3V9,115 from Nexperia is a ±5 % tolerance Zener diode in SOD523 (SC-79) package, rated for 3.9 V nominal regulation voltage at 5 mA, with 300 mW total power dissipation and 40 W non-repetitive peak reverse power capability. It serves as a precision voltage reference or overvoltage clamp in low-power analog sensing, microcontroller I/O protection, and battery monitoring circuits.
For engineers reviewing the BZX585-C3V9,115 datasheet, BZX585-C3V9,115 pinout, BZX585-C3V9,115 application, or BZX585-C3V9,115 equivalent, key selection criteria include its 3.71–4.10 V working voltage range at 5 mA, 400–500 Ω differential resistance, −3.5 to −1.9 mV/K temperature coefficient, and ultra-small SOD523 footprint for space-constrained PCB layouts.
Technical Context
This Zener diode operates in reverse breakdown mode with tightly controlled knee characteristics, enabling stable voltage regulation under low-current conditions (IZ = 1–5 mA). Its thermal resistance from junction to solder point is 65 K/W, supporting reliable operation on FR4 PCBs with minimal copper area.
The device exhibits a negative temperature coefficient between −3.5 mV/K and −1.9 mV/K across its operating current range, ensuring predictable drift behavior in ambient temperature variations from −65 °C to +150 °C. Reverse leakage remains ≤3.0 µA at VR = 1 V, supporting low-power standby functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 3.9 V at IZ = 5 mA - defines regulated output level in shunt regulator or reference circuits |
| Zener Voltage Tolerance | ±5 % - ensures voltage accuracy within 3.71–4.10 V at nominal test current |
| Differential Resistance | 400–500 Ω at IZ = 5 mA - determines regulation stiffness and load-induced voltage deviation |
| Total Power Dissipation | 300 mW at Tamb = 25 °C - sets maximum continuous DC power handling on standard FR4 PCB |
| Non-repetitive Peak Power | 40 W for tp = 100 µs - enables transient surge suppression in ESD or inductive kickback events |
| Reverse Leakage Current | ≤3.0 µA at VR = 1 V - minimizes quiescent current draw in always-on monitoring nodes |
| Package | SOD523 (SC-79) - 1.25 mm × 0.85 mm footprint ideal for high-density portable electronics |
Pinout & Package
Two-terminal SOD523 (SC-79) surface-mount package with cathode marked by a bar on the top surface; anode and cathode terminals are arranged linearly with 0.65 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; reverse-biased terminal where Zener breakdown occurs |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes current path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SMD package | SOD523 footprint (1.25 × 0.85 mm) reduces board area by >50 % vs. SOD323 in space-critical wearables and IoT sensors |
| Low differential resistance | 400–500 Ω at 5 mA improves regulation stability against load current fluctuations in precision references |
| Controlled temperature coefficient | −3.5 to −1.9 mV/K enables predictable voltage drift compensation in temperature-varying environments |
| High surge robustness | 40 W non-repetitive peak power rating supports transient clamping without degradation in industrial control inputs |
| Low leakage performance | ≤3.0 µA at 1 V reverse bias maintains battery life in multi-year coin-cell-powered applications |
Applications
| Industrial Sensor Signal Conditioning | Microcontroller I/O Protection |
|---|---|
Use Scenario: Stabilizing reference voltage for 12-bit ADC front-end in temperature/humidity transmitters. IC Role / Device Role / Timing Role: Zener diode provides fixed 3.9 V shunt reference to bias op-amp input stage and set ADC full-scale range. Use Value: Tight ±5 % tolerance and low 400–500 Ω rdiff ensure <±1 LSB error contribution across 0–70 °C operating range. |
Use Scenario: Clamping 3.3 V GPIO lines against ESD and supply rail overshoot in embedded gateways. IC Role / Device Role / Timing Role: Cathode tied to I/O pin, anode to ground - conducts during overvoltage transients to limit pin voltage to ~4.1 V. Use Value: 40 W peak power rating absorbs 2 kV HBM ESD pulses without parametric shift or failure. |
| Portable Battery Voltage Monitoring | Low-Power RTC Backup Regulation |
Use Scenario: Monitoring Li-ion cell voltage via resistive divider into MCU ADC during sleep mode. IC Role / Device Role / Timing Role: Zener placed across divider output to clamp leakage-induced offset and stabilize reference point. Use Value: ≤3.0 µA IR at 1 V prevents measurable current drain on 220 mAh coin cell over 5-year product lifetime. |
Use Scenario: Providing stable 3.9 V bias to real-time clock IC during main supply brownout. IC Role / Device Role / Timing Role: Shunt regulator maintaining RTC VDD within specification when primary 3.3 V rail drops below 3.0 V. Use Value: −3.5 to −1.9 mV/K TC allows predictable voltage drop during temperature cycling, simplifying firmware compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX585-B3V9,115 | ±2 % tolerance (3.82–3.98 V), higher cost, tighter rdiff (350–500 Ω) | Better regulation accuracy required in metrology-grade sensor references | Select when ±2 % voltage precision outweighs cost sensitivity and board space constraints |
| MMSZ4V3T1G | 4.3 V nominal, ±5 %, SOD-123 package (2.7 × 1.4 mm), 500 mW Ptot | Larger footprint but higher continuous power for higher-current bias networks | Choose when thermal margin >300 mW is needed and PCB area permits larger package |
Compared with BZX585-B3V9,115, this part trades voltage accuracy for cost and size efficiency; versus MMSZ4V3T1G, it sacrifices power headroom for 55 % smaller footprint and better fit in miniaturized designs.
Availability
BZX585-C3V9,115 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, microcontroller I/O protection, and portable battery voltage monitoring requiring stable component supply and long-term obsolescence management.
Supply support for BZX585-C3V9,115 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 semiconductor expert focused on high-volume, high-reliability discrete and logic devices, serving automotive, industrial, and consumer markets with scalable manufacturing and rigorous quality systems.
The BZX585 series belongs to Nexperia's general-purpose Zener diode product line, engineered for compact, cost-effective voltage regulation and transient protection in space- and power-constrained applications.
FAQ
What is the maximum continuous forward current for BZX585-C3V9,115?
The absolute maximum forward current is 200 mA per limiting values table. However, forward conduction is not its intended operating mode; sustained forward bias above 100 mA risks thermal overstress due to 1.1 V VF and limited 300 mW power budget. Use only for brief testing or fault conditions.
Can BZX585-C3V9,115 be used in place of a 3.3 V Zener diode?
No - its nominal Zener voltage is 3.9 V (range 3.71–4.10 V), not 3.3 V. Substituting it for a 3.3 V part would raise regulated voltage by ~0.6 V, potentially exceeding downstream IC absolute maximum ratings. Use BZX585-C3V3,115 (3.3 V) instead.
How does the SOD523 package affect thermal performance?
With Rth(j-a) = 350 K/W in free air and Rth(j-sp) = 65 K/W to solder point, the SOD523 demands careful PCB layout: ≥35 mm² copper area at cathode pad is required to achieve rated 300 mW dissipation. Without adequate copper, derating to ≤150 mW is necessary.
Is BZX585-C3V9,115 suitable for automotive applications?
No - this device is not AEC-Q200 qualified. The datasheet explicitly states non-automotive qualification, and no automotive stress testing or extended temperature validation is performed. For automotive use, select Nexperia's AEC-Q200 qualified PZU series or equivalent qualified alternatives.
BZX585-C3V9,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3.9 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
BZX585-C3V9,115 FAQ
1.How can I place an order for BZX585-C3V9,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX585-C3V9,115 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 BZX585-C3V9,115 reliable?
The price and inventory of BZX585-C3V9,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX585-C3V9,115 is usually 5 days.
3.What payment methods are accepted for BZX585-C3V9,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX585-C3V9,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX585-C3V9,115?
BZX585-C3V9,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX585-C3V9,115 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 BZX585-C3V9,115?
For technical support, including BZX585-C3V9,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX585-C3V9,115 requirements.
6.How does Aetrix verify that BZX585-C3V9,115 is sourced from the original manufacturer or authorized distributors?
All BZX585-C3V9,115 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 BZX585-C3V9,115 meets industry standards.
7.What is the process for return or replacement of BZX585-C3V9,115?
All BZX585-C3V9,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX585-C3V9,115, 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 BZX585-C3V9,115 part is unused and in its original packaging.
Return procedure for BZX585-C3V9,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX585-C3V9,115 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…
