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Nexperia USA Inc. BZX585-C4V3,115
- Part No.:
- BZX585-C4V3,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX585-C4V3,115.pdf
- Description:
- DIODE ZENER 4.3V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:8,023
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Product details
Overview
BZX585-C4V3,115 from Nexperia is a ±5 % tolerance Zener diode in SOD523 (SC-79) package, rated for 4.3 V nominal Zener voltage at 5 mA, 300 mW total power dissipation, and 40 W non-repetitive peak reverse power. It serves as a precision voltage reference or shunt regulator in low-power analog sensing and power rail stabilization circuits.
For engineers reviewing the BZX585-C4V3,115 datasheet, BZX585-C4V3,115 pinout, BZX585-C4V3,115 application, or BZX585-C4V3,115 equivalent, this device is selected for compact voltage clamping in space-constrained consumer and industrial PCBs where thermal resistance to ambient (350 K/W) and low differential resistance (≤600 Ω at 5 mA) are critical for stable regulation under transient load conditions.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified Zener voltage of 4.09 V to 4.52 V at IZ = 5 mA and exhibits a temperature coefficient of −3.5 mV/K to −1.7 mV/K across its operating junction temperature range (−65 °C to +150 °C). Its low 1.1 V forward voltage at 100 mA enables use in dual-direction protection schemes.
The device features ultra-small SOD523 packaging with cathode-marked anisotropic thermal resistance (Rth(j-sp) = 65 K/W to solder point), enabling effective heat transfer in high-density layouts. Non-repetitive surge capability (IZSM = 6.0 A, tp = 100 µs) supports transient overvoltage suppression without derating in pulse-limited applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.09 V to 4.52 V at IZ = 5 mA - defines precise clamping threshold for 3.3 V/5 V rail monitoring |
| Tolerance | ±5 % - ensures predictable regulation band without binning or calibration in cost-sensitive designs |
| Total Power Dissipation | 300 mW at Tamb = 25 °C on FR4 with 35 mm² copper - sets continuous DC bias limit for passive regulation |
| Differential Resistance | ≤600 Ω at IZ = 5 mA - determines output impedance and load regulation error under varying current |
| Non-repetitive Peak Power | 40 W for tp = 100 µs - enables single-event ESD or surge suppression without permanent degradation |
| Forward Voltage | 1.1 V at IF = 100 mA - allows bidirectional clamping when paired with series diode or in rail-to-rail protection |
| Junction Temperature Range | −65 °C to +150 °C - supports operation in extended-temperature industrial and automotive-adjacent environments |
Pinout & Package
SOD523 (SC-79) ultra-small flat-lead surface-mount package: 1.25 mm × 0.85 mm body, 0.65 mm height, cathode marked by bar on top surface.
| 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 reference; completes reverse-bias path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-compact SMD footprint | SOD523 (1.25 × 0.85 mm) enables placement in <1.5 mm² board area - ideal for wearables and IoT sensors |
| Low differential resistance | ≤600 Ω at 5 mA improves regulation accuracy under ±1 mA load variation - reduces output drift in feedback networks |
| Controlled temperature coefficient | −3.5 to −1.7 mV/K minimizes thermal drift in ambient-varying environments - critical for battery-powered precision references |
| High surge robustness | 40 W non-repetitive peak power withstands IEC 61000-4-5 Level 3 surges without parameter shift - eliminates need for external TVS in many cases |
| Low leakage current | ≤3.0 µA at VR = 1 V ensures minimal quiescent current draw in always-on monitoring circuits |
Applications
| Power Rail Clamping | Reference Voltage Source |
|---|---|
|
Use Scenario: Protecting 3.3 V microcontroller I/O pins from ESD and overvoltage transients in handheld devices. IC Role / Device Role / Timing Role: Shunt clamping element placed between I/O line and ground, conducting only above 4.3 V threshold. Use Value: Limits voltage excursion to ≤4.52 V with <600 Ω dynamic impedance, preventing latch-up while drawing <3 µA at standby. |
Use Scenario: Providing stable 4.3 V reference for ADC biasing in battery-operated environmental sensor nodes. IC Role / Device Role / Timing Role: Passive Zener reference in ratiometric measurement circuit with low-current op-amp buffer. Use Value: Delivers ±5 % initial accuracy and <0.2 %/°C thermal drift over −20 °C to +70 °C, enabling <12-bit effective resolution. |
| Low-Power Voltage Regulation | Signal-Level Protection |
|
Use Scenario: Regulating auxiliary 4.3 V supply for RF front-end ICs in LPWAN modules with tight space constraints. IC Role / Device Role / Timing Role: Shunt regulator with series resistor, maintaining constant voltage under 0–5 mA load variation. Use Value: Maintains output within ±25 mV across full load range due to 600 Ω rdiff, eliminating need for active LDO in ultra-low-quiescent designs. |
Use Scenario: Bidirectional signal line protection (e.g., UART TX/RX) against coupling-induced spikes in industrial gateways. IC Role / Device Role / Timing Role: Paired back-to-back with identical unit to clamp both positive and negative excursions. Use Value: Achieves symmetrical ±4.3 V clamping with 1.1 V forward drop, preserving signal integrity up to 1 Mbps without added capacitance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX585-B4V3,115 | ±2 % tolerance (vs. ±5 %), tighter VZ spread (4.21–4.39 V), higher cost | Required where initial accuracy >±20 mV is mandatory, e.g., calibration-critical instrumentation | Select when absolute voltage precision outweighs cost sensitivity and board area constraints |
| MMSZ4V3T1G | Same SOD-123 package (larger: 2.7 × 1.4 mm), 4.1–4.5 V range, 500 mW Ptot | Better thermal performance (Rth(j-a) ≈ 270 K/W) but occupies >3× PCB area | Choose when higher continuous power handling is needed and layout space permits larger footprint |
Compared with BZX585-B4V3,115, the C-grade offers cost and availability advantages for non-critical regulation; versus MMSZ4V3T1G, it trades thermal margin for 60 % smaller footprint-making it optimal for miniaturized, battery-powered systems where 300 mW dissipation suffices.
Availability
BZX585-C4V3,115 is available at Aetrix Electronics and suitable for power rail clamping, reference voltage generation, low-power regulation, and signal-level protection requiring stable component supply across high-mix, low-volume production runs.
Supply support for BZX585-C4V3,115 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 optimized for efficiency and miniaturization in mass-market electronics.
The BZX585 series targets space-constrained, cost-sensitive applications needing precision Zener regulation - designed specifically for ultra-small SOD523 packaging without sacrificing surge robustness or thermal performance.
FAQ
What is the maximum continuous reverse current for BZX585-C4V3,115 at 25 °C?
The maximum continuous reverse current is derived from its 300 mW power rating and 4.3 V Zener voltage, yielding approximately 70 mA (300 mW ÷ 4.3 V). This assumes no ambient temperature rise and adequate PCB copper area (35 mm² at cathode tab); actual usable current decreases with rising ambient temperature per Rth(j-a) = 350 K/W.
Can BZX585-C4V3,115 be used in place of a 3.3 V Zener diode?
No - its nominal Zener voltage is 4.3 V (range 4.09–4.52 V), making it unsuitable as a direct replacement for 3.3 V regulation. Using it in a 3.3 V system would cause excessive power dissipation or failure to regulate. For 3.3 V, consider BZX585-C3V3,115 (3.14–3.47 V) instead.
How does the SOD523 package affect thermal performance compared to SOD-123?
The SOD523 package has higher thermal resistance to ambient (350 K/W vs. ~270 K/W for SOD-123), limiting continuous power handling. However, its lower Rth(j-sp) = 65 K/W enables efficient localized heat transfer to the solder joint, making it preferable in thermally isolated high-density layouts where bulk ambient cooling is unavailable.
Is BZX585-C4V3,115 suitable for automotive applications?
No - this part is not AEC-Q200 qualified and lacks automotive-grade screening or guaranteed operation beyond 125 °C junction temperature. While it functions up to 150 °C, Nexperia explicitly states non-automotive qualification in its legal disclaimers; use only in consumer, industrial, or commercial equipment unless independently validated for automotive use.
BZX585-C4V3,115 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):
- 4.3 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-C4V3,115 FAQ
1.How can I place an order for BZX585-C4V3,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX585-C4V3,115 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-C4V3,115 reliable?
The price and inventory of BZX585-C4V3,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX585-C4V3,115 is usually 5 days.
3.What payment methods are accepted for BZX585-C4V3,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX585-C4V3,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX585-C4V3,115?
BZX585-C4V3,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX585-C4V3,115 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-C4V3,115?
For technical support, including BZX585-C4V3,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX585-C4V3,115 requirements.
6.How does Aetrix verify that BZX585-C4V3,115 is sourced from the original manufacturer or authorized distributors?
All BZX585-C4V3,115 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-C4V3,115 meets industry standards.
7.What is the process for return or replacement of BZX585-C4V3,115?
All BZX585-C4V3,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX585-C4V3,115, 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-C4V3,115 part is unused and in its original packaging.
Return procedure for BZX585-C4V3,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX585-C4V3,115 Tags
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