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Nexperia USA Inc. BZX585-B3V0,115
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- Part No.:
- BZX585-B3V0,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX585-B3V0,115.pdf
- Description:
- DIODE ZENER 3V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:4,860
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX585-B3V0,115 from Nexperia is a ±2 % tolerance Zener diode in SOD523 (SC-79) package, rated for 3.0 V nominal regulation at 5 mA, with 325 Ω typical differential resistance and 10 µA max reverse current at 2.4 V. It delivers stable voltage reference in space-constrained power rail monitoring and low-current biasing circuits.
For engineers reviewing the BZX585-B3V0,115 datasheet, BZX585-B3V0,115 pinout, BZX585-B3V0,115 application, or BZX585-B3V0,115 equivalent, this part supports precision low-voltage regulation where ultra-small footprint, tight tolerance, and low thermal resistance (65 K/W to solder point) are critical design requirements.
Technical Context
This Zener diode operates in reverse breakdown mode with a nominal Zener voltage of 3.0 V at IZ = 5 mA, exhibiting a negative temperature coefficient of −3.5 to −1.6 mV/K across its operating range. Its low 325 Ω differential resistance ensures minimal voltage deviation under load variation.
The device sustains non-repetitive peak reverse power up to 40 W (100 µs square wave, Tj = 25 °C), while continuous dissipation is limited to 300 mW at 25 °C ambient on FR4 PCB with 35 mm² copper area. Junction-to-solder-point thermal resistance is 65 K/W, enabling effective heat transfer in compact layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.94 V to 3.06 V at IZ = 5 mA - defines precise 3.0 V regulation window for low-voltage reference stability |
| Differential Resistance (rdiff) | 325 Ω typ. at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Reverse Current (IR) | ≤ 10 µA at VR = 2.4 V - ensures minimal leakage below knee voltage in standby operation |
| Total Power Dissipation (Ptot) | 300 mW at Tamb = 25 °C on FR4 with 35 mm² cathode copper - sets maximum continuous DC bias capability |
| Non-repetitive Peak Power (PZSM) | 40 W for 100 µs square wave - enables transient overvoltage clamping without failure |
| Junction-to-Solder-Point Rth | 65 K/W - supports thermal reliability in high-density PCB assemblies with direct cathode thermal path |
| Package | SOD523 (SC-79) - 1.25 mm × 0.85 mm footprint ideal for wearables, IoT sensors, and portable battery management |
Pinout & Package
SOD523 (SC-79) ultra-small flat-lead surface-mount package with cathode band marking on terminal 1; total dimensions 1.25 mm × 0.85 mm × 0.65 mm (L × W × H), 0.34 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marked by visible bar; carries reverse-biased Zener current |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener voltage tolerance | Enables tighter regulation margins than ±5 % variants, reducing need for post-regulation trimming in precision analog stages |
| Ultra-small SOD523 package | 1.25 mm × 0.85 mm footprint saves >60 % board area vs. SOD323, critical for miniaturized power management ICs |
| Low 325 Ω differential resistance | Minimizes output voltage shift under ±1 mA load change, improving stability in feedback divider networks |
| 65 K/W junction-to-solder-point Rth | Allows higher sustained power in thermally constrained layouts by leveraging PCB copper as heatsink |
| 40 W non-repetitive surge rating | Clamps ESD transients (IEC 61000-4-2 Level 4) without degradation when used with series current limiting |
Applications
| USB-C Port Protection | IoT Sensor Biasing |
|---|---|
|
Use Scenario: Clamping 3.3 V USB-C VBUS line against ESD surges and hot-swap transients. IC Role / Device Role / Timing Role: Zener diode acting as low-leakage shunt clamp referenced to system ground. Use Value: 10 µA max reverse leakage at 2.4 V prevents loading of upstream LDO; 40 W surge rating absorbs 15 kV contact discharge per IEC 61000-4-2. |
Use Scenario: Providing stable 3.0 V reference for ADC input scaling in battery-powered environmental sensors. IC Role / Device Role / Timing Role: Precision voltage reference element in resistive divider network feeding SAR ADC reference pin. Use Value: ±2 % tolerance and 325 Ω rdiff ensure <0.5 % full-scale error contribution across 0–50 °C ambient range. |
| Wearable Battery Monitoring | Low-Power MCU Reset Circuit |
|
Use Scenario: Monitoring Li-ion cell voltage via resistor divider with Zener-stabilized reference for fuel gauge accuracy. IC Role / Device Role / Timing Role: Stable 3.0 V reference source for analog front-end comparator threshold setting. Use Value: 300 mW Ptot and 65 K/W Rth(j-sp) allow continuous operation at 2.5 mA bias without thermal derating in 2-layer flex PCBs. |
Use Scenario: Generating clean reset threshold for ARM Cortex-M0+ microcontrollers operating at 3.0 V supply. IC Role / Device Role / Timing Role: Zener-based voltage detector in discrete reset generator circuit with RC timing. Use Value: Negative tempco (−3.5 to −1.6 mV/K) compensates for silicon bandgap drift, maintaining reset threshold within ±1.2 % from −20 to +70 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX585-C3V0,115 | ±5 % tolerance (2.85–3.15 V), same SOD523 package and thermal specs | Acceptable where 3.0 V reference accuracy ≤ ±5 % suffices, e.g., non-critical power-good detection | Select for cost-sensitive designs where tighter tolerance is unnecessary and inventory consolidation is prioritized |
| MMSZ4678T1G | 3.0 V ±5 %, SOD-123 package (2.7 × 1.6 mm), 500 mW Ptot, 100 Ω rdiff | Higher power handling but 3× larger footprint; better for higher-current biasing (>5 mA) | Choose when board space permits and lower dynamic impedance is required, especially in linear regulator feedback paths |
Compared with BZX585-C3V0,115, the BZX585-B3V0,115 offers tighter regulation for precision analog functions; versus MMSZ4678T1G, it trades higher rdiff for 55 % smaller footprint-critical in wearable and hearing aid PCBs where every 0.1 mm² matters.
Availability
BZX585-B3V0,115 is available at Aetrix Electronics and suitable for USB-C protection, IoT sensor biasing, wearable battery monitoring, and low-power MCU reset circuits requiring stable component supply with guaranteed long-term sourcing.
Supply support for BZX585-B3V0,115 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 logic, discrete, and MOSFET solutions, serving automotive, industrial, and consumer markets with ISO/TS 16949-certified manufacturing.
The BZX585 series belongs to Nexperia's general-purpose Zener diode product line, engineered for compact, cost-effective voltage regulation in space- and power-constrained applications such as portable electronics and sensor interfaces.
FAQ
What is the maximum continuous forward current for BZX585-B3V0,115?
The absolute maximum forward current is 200 mA per IEC 60134 limiting values. However, forward conduction is not its intended operating mode; the device is designed for reverse-bias Zener regulation. Sustained forward current above 100 mA risks thermal overstress due to 1.1 V forward drop and 350 K/W junction-to-ambient resistance.
Can BZX585-B3V0,115 be used as a 3.0 V voltage reference in ADC circuits?
Yes-it provides a stable 3.0 V reference with ±2 % tolerance and low 10 µA leakage at 2.4 V, making it suitable for 8–10-bit ADC scaling where external reference precision is secondary to size and cost. For 12-bit+ systems, its 325 Ω differential resistance may introduce gain error if loaded beyond 100 µA.
How does the temperature coefficient affect regulation accuracy over temperature?
At 3.0 V, the BZX585-B3V0 exhibits a temperature coefficient of −3.5 to −1.6 mV/K. Over −20 to +70 °C, this causes a −175 to −112 mV shift, or −5.8 % to −3.7 % deviation from nominal. This must be compensated in high-accuracy references via circuit-level tempco correction or selection of higher-VZ variants with positive coefficients.
Is BZX585-B3V0,115 suitable for automotive applications?
No-this device is not AEC-Q200 qualified. Nexperia explicitly states in its legal disclaimers that non-automotive qualified products like the BZX585 series are unsuitable for safety-critical or automotive use. For automotive-grade Zeners, consider Nexperia's Automotive Qualified (AQ) series such as PZTA42/AQ or BZX84-AQ variants.
BZX585-B3V0,115 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 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 10 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-B3V0,115 FAQ
1.How can I place an order for BZX585-B3V0,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX585-B3V0,115 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-B3V0,115 reliable?
The price and inventory of BZX585-B3V0,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX585-B3V0,115 is usually 5 days.
3.What payment methods are accepted for BZX585-B3V0,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX585-B3V0,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX585-B3V0,115?
BZX585-B3V0,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX585-B3V0,115 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-B3V0,115?
For technical support, including BZX585-B3V0,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX585-B3V0,115 requirements.
6.How does Aetrix verify that BZX585-B3V0,115 is sourced from the original manufacturer or authorized distributors?
All BZX585-B3V0,115 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-B3V0,115 meets industry standards.
7.What is the process for return or replacement of BZX585-B3V0,115?
All BZX585-B3V0,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX585-B3V0,115, 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-B3V0,115 part is unused and in its original packaging.
Return procedure for BZX585-B3V0,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX585-B3V0,115 Tags
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MMBZ5240B-7-F
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BZT52C5V6T-7
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MMSZ5231B-7-F
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MM5Z5V1ST1G
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