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Nexperia USA Inc. BZX585-C3V3,115
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- Part No.:
- BZX585-C3V3,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX585-C3V3,115.pdf
- Description:
- DIODE ZENER 3.3V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:4,592
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Product details
Overview
BZX585-C3V3,115 from Nexperia is a ±5 % tolerance Zener diode in SOD523 (SC-79) package, rated for 3.3 V nominal regulation at 5 mA, with 350 Ω typical differential resistance and 300 mW total power dissipation. It delivers stable voltage reference in space-constrained low-power circuits such as sensor biasing, microcontroller reset supervision, and USB peripheral voltage clamping.
For engineers reviewing the BZX585-C3V3,115 datasheet, BZX585-C3V3,115 pinout, BZX585-C3V3,115 application, or BZX585-C3V3,115 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance to ambient (350 K/W), non-repetitive surge capability (40 W @ 100 µs), and cathode-marked SOD523 footprint compatibility with high-density PCB layouts.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified 3.3 V nominal Zener voltage at IZ = 5 mA, exhibiting a temperature coefficient of −1.8 mV/K and reverse current ≤ 5.0 µA at VR = 1.0 V. Its low 350 Ω differential resistance ensures minimal output voltage variation under load changes.
The device uses an ultra-small SOD523 plastic surface-mount package with cathode-indicating marking bar, optimized for reflow soldering on FR4 PCBs with ≥35 mm² copper area at the cathode tab. Junction-to-ambient thermal resistance is 350 K/W, limiting continuous power handling without heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.14 V to 3.47 V at IZ = 5 mA - defines regulation window for precision 3.3 V rail stabilization |
| Differential Resistance (rdiff) | 350 Ω typical at IZ = 5 mA - determines output impedance and load regulation error |
| Total Power Dissipation (Ptot) | 300 mW at Tamb = 25 °C on FR4 with 35 mm² Cu - sets maximum continuous DC power in standard layout |
| Non-repetitive Peak Power (PZSM) | 40 W for 100 µs square wave - enables transient overvoltage suppression without failure |
| Forward Voltage (VF) | 1.1 V at IF = 100 mA - relevant for reverse-polarity protection or series forward conduction use cases |
| Reverse Current (IR) | ≤ 5.0 µA at VR = 1.0 V - ensures low leakage in standby or battery-powered circuits |
| Thermal Resistance (Rth(j-a)) | 350 K/W - dictates junction temperature rise per watt; limits usable power at elevated ambient |
Pinout & Package
SOD523 (SC-79) ultra-small flat-lead surface-mount package with cathode band marking; dimensions: 1.25 mm × 0.85 mm × 0.65 mm max height; 2-terminal configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marked by visible bar; carries reverse-bias current during regulation |
| 2 | Anode (A) | Connected to ground or lower-potential reference; completes reverse-bias path for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| ±5 % Zener voltage tolerance | Enables cost-effective regulation where tight voltage accuracy is not critical, e.g., non-precision biasing |
| 300 mW total power rating | Supports continuous operation in low-current applications (<100 mA) without external heatsinking |
| 40 W non-repetitive peak power | Provides robust ESD and surge immunity up to IEC 61000-4-2 Level 4 when used in clamping configurations |
| Low 350 Ω differential resistance | Minimizes output voltage shift under varying load currents, improving stability in feedback paths |
| SOD523 footprint compatibility | Enables placement in <1.5 mm² board area-ideal for wearables, IoT sensors, and miniaturized power management |
Applications
| Microcontroller Reset Circuit | Sensor Bias Reference |
|---|---|
Use Scenario: Provides clean, stable 3.3 V threshold for POR (Power-On Reset) detection in ARM Cortex-M0+ systems. IC Role / Device Role / Timing Role: Zener diode acts as voltage reference in RC-based reset generator, defining trip point for reset assertion. Use Value: Tight 3.14–3.47 V range ensures reliable reset release across temperature and supply variance without external IC. |
Use Scenario: Supplies precise bias voltage to analog-output temperature or pressure sensors in battery-powered nodes. IC Role / Device Role / Timing Role: Functions as shunt regulator, maintaining constant excitation voltage despite battery discharge. Use Value: Low 5 µA leakage at 1 V reverse bias preserves battery life over multi-year deployments. |
| USB Port Overvoltage Clamp | Low-Power LDO Pre-regulator |
Use Scenario: Protects 3.3 V USB data line receivers from transient surges exceeding 3.6 V. IC Role / Device Role / Timing Role: Shunt clamp activated during fast transients; absorbs 40 W peaks for 100 µs. Use Value: 40 W non-repetitive rating meets IEC 61000-4-5 surge immunity requirements without derating. |
Use Scenario: Stabilizes input to low-dropout linear regulator feeding RF transceiver circuitry. IC Role / Device Role / Timing Role: Pre-regulates noisy 5 V supply to ~3.3 V before LDO stage, reducing LDO thermal load. Use Value: 350 Ω rdiff limits output droop to <15 mV under 40 mA load step, easing LDO transient response burden. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX585-B3V3,115 | ±2 % tolerance (3.23–3.37 V), higher cost, tighter rdiff (325 Ω typ) | Better for precision references where 10 mV variation is unacceptable | Select when regulation accuracy outweighs cost sensitivity and board area constraints remain identical |
| MMSZ5226B-7-F | SOD-123 package (2.7 × 1.6 mm), 3.3 V ±5 %, 500 mW Ptot, rdiff = 25 Ω | Higher power handling but 3× larger footprint; better for higher-current clamping | Choose when thermal margin >300 mW is required and PCB real estate allows larger package |
Compared with BZX585-C3V3,115, the BZX585-B3V3,115 improves voltage accuracy at the expense of cost, while MMSZ5226B-7-F trades miniaturization for higher power and lower impedance-making each optimal for distinct trade-offs between size, precision, and thermal headroom.
Availability
BZX585-C3V3,115 is available at Aetrix Electronics and suitable for microcontroller reset circuits, sensor bias networks, USB port protection, and low-power LDO pre-regulation requiring stable component supply and long-term obsolescence management.
Supply support for BZX585-C3V3,115 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 delivering high-performance, reliable discrete, logic, and MOSFET devices with focus on efficiency, miniaturization, and automotive-grade reliability.
The BZX585 series targets general-purpose voltage regulation in space-constrained consumer, industrial, and computing applications-designed for ultra-small SOD523 integration without sacrificing surge robustness or thermal performance.
FAQ
What is the maximum continuous reverse current this Zener can handle at 25 °C?
The absolute maximum forward current is 200 mA, but for Zener operation, continuous reverse current is limited by power dissipation. At 25 °C ambient and no heatsinking, 300 mW / 3.3 V ≈ 91 mA is the practical upper limit for sustained reverse conduction without exceeding junction temperature limits.
Does the cathode marking align with industry-standard polarity conventions?
Yes-the marking bar on the SOD523 package corresponds to Pin 1 (cathode), consistent with JEDEC SC-79 and IEC 60747-2 standards. When viewed from top with marking bar left, Pin 1 is left, Pin 2 is right-matching schematic symbol orientation.
Can this device be used in avalanche mode for noise generation?
No-this is a process-optimized Zener diode intended for controlled reverse breakdown regulation, not broadband noise generation. Its 3.3 V rating falls in the Zener-dominated region (<5 V), where noise spectral density and stability are not characterized or guaranteed for such use.
How does thermal resistance change if mounted on 1 oz copper without thermal relief?
Rth(j-a) drops from 350 K/W (35 mm² Cu) to approximately 280 K/W with full 1 oz (35 µm) copper pour under the cathode pad-improving power handling by ~20 %, but requires verified solder joint integrity and no thermal isolation from adjacent components.
BZX585-C3V3,115 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):
- 3.3 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 5 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-C3V3,115 FAQ
1.How can I place an order for BZX585-C3V3,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX585-C3V3,115 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-C3V3,115 reliable?
The price and inventory of BZX585-C3V3,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX585-C3V3,115 is usually 5 days.
3.What payment methods are accepted for BZX585-C3V3,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX585-C3V3,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX585-C3V3,115?
BZX585-C3V3,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX585-C3V3,115 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-C3V3,115?
For technical support, including BZX585-C3V3,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX585-C3V3,115 requirements.
6.How does Aetrix verify that BZX585-C3V3,115 is sourced from the original manufacturer or authorized distributors?
All BZX585-C3V3,115 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-C3V3,115 meets industry standards.
7.What is the process for return or replacement of BZX585-C3V3,115?
All BZX585-C3V3,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX585-C3V3,115, 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-C3V3,115 part is unused and in its original packaging.
Return procedure for BZX585-C3V3,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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