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Nexperia USA Inc. BZX585-B3V3,115
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- Part No.:
- BZX585-B3V3,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX585-B3V3,115.pdf
- Description:
- DIODE ZENER 3.3V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:40,808
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Product details
Overview
BZX585-B3V3,115 from Nexperia is a 3.3 V ±2 % Zener voltage regulator diode in an SOD523 (SC-79) ultra-small surface-mount package, rated for 300 mW total power dissipation and 40 W non-repetitive peak reverse power, used for precision low-voltage regulation in space-constrained consumer and industrial power rails.
For engineers reviewing the BZX585-B3V3,115 datasheet, BZX585-B3V3,115 pinout, BZX585-B3V3,115 application, or BZX585-B3V3,115 equivalent, key selection criteria include its 3.3 V nominal Zener voltage at 5 mA, 350 Ω typical differential resistance, −1.8 mV/K temperature coefficient, and cathode-marked two-terminal configuration in SC-79 packaging.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable DC voltage across load variations and input fluctuations. It delivers regulated output with 5.0 µA maximum reverse current at 1.0 V and 3.0 µA at 2.0 V, supporting low-power biasing and reference functions.
Its thermal resistance from junction to ambient is 350 K/W on FR4 PCB with 35 mm² copper area, and junction-to-solder-point resistance is 65 K/W-enabling reliable operation up to 150 °C junction temperature under pulsed surge conditions (tp = 100 µs, square wave).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.23 V to 3.37 V at IZ = 5 mA - tight tolerance ensures accurate 3.3 V rail stabilization |
| Differential Resistance (rdiff) | 350 Ω typical at IZ = 5 mA - defines regulation stiffness against load current changes |
| Temperature Coefficient (SZ) | −1.8 mV/K at IZ = 5 mA - negative drift enables predictable thermal behavior in ambient-varying environments |
| Total Power Dissipation (Ptot) | 300 mW at Tamb = 25 °C - sets continuous DC power limit on standard FR4 PCB |
| Non-repetitive Peak Reverse Power (PZSM) | 40 W at tp = 100 µs - supports transient overvoltage clamping without failure |
| Forward Voltage (VF) | 1.1 V at IF = 100 mA - defines conduction loss when used in forward-biased protection paths |
| Junction Temperature Range | −65 °C to +150 °C - enables deployment in extended-temperature industrial and automotive-adjacent applications |
Pinout & Package
SOD523 (SC-79) plastic surface-mounted package with 2 leads; 1.25 mm × 0.85 mm footprint, 0.65 mm height, cathode indicated by marking bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity-sensitive terminal where Zener breakdown occurs |
| 2 | Anode (A) | Connected to ground or lower-potential reference; completes reverse-bias path for regulation |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SMD package | SOD523 (SC-79) footprint enables placement in high-density PCB layouts with <1.1 mm² board area |
| Low differential resistance | 350 Ω typical improves voltage regulation accuracy under varying load currents |
| ±2 % Zener voltage tolerance | Ensures 3.3 V output remains within 3.23–3.37 V at 5 mA, critical for 3.3 V logic supply references |
| High surge robustness | 40 W non-repetitive peak power rating allows safe handling of short-duration ESD or inductive spikes |
| Low reverse leakage | 5.0 µA max at 1.0 V reverse bias minimizes quiescent current in always-on reference circuits |
Applications
| USB Peripheral Power Regulation | IoT Sensor Bias Reference |
|---|---|
Use Scenario: Regulating 3.3 V supply for USB-connected sensors in portable diagnostic tools. IC Role / Device Role / Timing Role: Zener diode provides shunt-based voltage clamp and reference for LDO input or direct rail stabilization. Use Value: Tight 3.3 V ±2 % tolerance maintains USB compliance and prevents sensor ADC offset errors. |
Use Scenario: Generating stable bias voltage for analog front-end amplifiers in battery-powered environmental sensors. IC Role / Device Role / Timing Role: Functions as low-current precision voltage reference in signal conditioning chains. Use Value: −1.8 mV/K temperature coefficient reduces drift-induced measurement error across −20 °C to +70 °C operating range. |
| Wearable Device Battery Monitoring | Industrial Control Signal Clamping |
Use Scenario: Scaling battery voltage for ADC input in compact fitness trackers with coin-cell power. IC Role / Device Role / Timing Role: Used in resistive divider with Zener reference to extend dynamic range of low-voltage ADCs. Use Value: 350 Ω differential resistance ensures minimal loading effect on high-impedance divider networks. |
Use Scenario: Protecting microcontroller GPIO pins from transient overvoltage in factory automation I/O modules. IC Role / Device Role / Timing Role: Shunt clamp absorbing surge energy during relay switching or ESD events. Use Value: 40 W non-repetitive peak power rating handles 100 µs surges without degradation or parametric shift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX585-C3V3,115 | ±5 % tolerance (3.14–3.47 V), higher 5.0 µA IR at 2.0 V | Acceptable where 3.3 V ±5 % meets system margin; less precise but lower cost | Select for cost-sensitive designs with relaxed voltage accuracy requirements |
| MMSZ4678T1G | 3.3 V ±5 %, SOD-123 package (2.7 × 1.6 mm), 500 mW Ptot | Requires larger PCB area but supports higher continuous power in thermally constrained layouts | Choose when thermal management demands >300 mW steady-state dissipation |
Compared with BZX585-C3V3,115, the BZX585-B3V3,115 offers tighter voltage control critical for reference-grade circuits; versus MMSZ4678T1G, it trades package size for board-space efficiency while maintaining identical Zener function in ultra-compact systems.
Availability
BZX585-B3V3,115 is available at Aetrix Electronics and suitable for USB peripheral power regulation, IoT sensor bias reference, wearable device battery monitoring, and industrial control signal clamping requiring stable component supply and consistent parametric performance across production batches.
Supply support for BZX585-B3V3,115 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 high-volume electronics.
The BZX585 series belongs to Nexperia's general-purpose Zener diode product line, engineered for precision voltage regulation in space-constrained, low-power applications such as portable electronics and sensor interfaces.
FAQ
What is the maximum continuous reverse current for BZX585-B3V3,115?
The device has no specified maximum continuous reverse current; instead, it is rated for 300 mW total power dissipation at 25 °C ambient. At 3.3 V Zener voltage, this corresponds to approximately 91 mA continuous Zener current on a standard FR4 PCB with 35 mm² copper area at the cathode tab.
Can BZX585-B3V3,115 be used in forward conduction mode?
Yes-it exhibits 1.1 V forward voltage at 100 mA, making it suitable for low-drop rectification or polarity protection in low-current paths, though its primary design intent is reverse-bias Zener regulation, not power rectification.
How does the marking code 'C4' identify BZX585-B3V3,115?
Per Table 4 of the datasheet, 'C4' is the standardized marking code etched on the device body to denote the BZX585-B3V3 variant; the bar adjacent to pin 1 indicates the cathode, enabling unambiguous orientation during automated placement.
Is thermal derating required above 25 °C ambient?
Yes-its 300 mW rating applies only at 25 °C ambient. With a junction-to-ambient thermal resistance of 350 K/W, power must be linearly reduced by 0.857 mW/°C above 25 °C to maintain Tj ≤ 150 °C, reaching zero allowable dissipation at ~165 °C ambient.
BZX585-B3V3,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- PXXXXSX
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3.3 V
- Tolerance:
- ±2%
- 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-B3V3,115 FAQ
1.How can I place an order for BZX585-B3V3,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX585-B3V3,115 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-B3V3,115 reliable?
The price and inventory of BZX585-B3V3,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX585-B3V3,115 is usually 5 days.
3.What payment methods are accepted for BZX585-B3V3,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX585-B3V3,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX585-B3V3,115?
BZX585-B3V3,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX585-B3V3,115 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-B3V3,115?
For technical support, including BZX585-B3V3,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX585-B3V3,115 requirements.
6.How does Aetrix verify that BZX585-B3V3,115 is sourced from the original manufacturer or authorized distributors?
All BZX585-B3V3,115 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-B3V3,115 meets industry standards.
7.What is the process for return or replacement of BZX585-B3V3,115?
All BZX585-B3V3,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX585-B3V3,115, 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-B3V3,115 part is unused and in its original packaging.
Return procedure for BZX585-B3V3,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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