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Nexperia USA Inc. BZX585-B3V9,115
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- Part No.:
- BZX585-B3V9,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX585-B3V9,115.pdf
- Description:
- DIODE ZENER 3.9V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:974
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Product details
Overview
BZX585-B3V9,115 from Nexperia is a ±2 % tolerance Zener diode in SOD523 (SC-79) package, rated for 3.9 V nominal regulation 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 reset circuits, and portable battery management systems.
For engineers reviewing the BZX585-B3V9,115 datasheet, BZX585-B3V9,115 pinout, BZX585-B3V9,115 application, or BZX585-B3V9,115 equivalent, key selection criteria include its 3.9 V Zener voltage tolerance, low 400 Ω differential resistance at 5 mA, −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 to maintain stable voltage across its terminals under varying load and temperature conditions. Its design targets low-current regulation (IZ = 1–5 mA), with specified forward voltage ≤1.1 V at 100 mA and reverse leakage ≤3.0 µA at VR = 3.0 V.
The device features a negative temperature coefficient of −1.9 mV/K at IZ = 5 mA, enabling predictable drift compensation in reference circuits. Thermal resistance from junction to solder point is 65 K/W, supporting reliable operation up to 150 °C junction temperature when mounted on FR4 with 35 mm² copper area at the cathode tab.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.82 V to 3.98 V at IZ = 5 mA - defines precise regulation window for 3.9 V nominal reference |
| Differential Resistance (rdiff) | 400 Ω max at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Temperature Coefficient (SZ) | −1.9 mV/K at IZ = 5 mA - quantifies voltage drift per degree Celsius for thermal stability analysis |
| Total Power Dissipation (Ptot) | 300 mW at Tamb = 25 °C - sets maximum continuous DC power handling on standard FR4 PCB |
| Non-repetitive Peak Reverse Power (PZSM) | 40 W for tp = 100 µs square wave - enables transient surge suppression in ESD or inductive kick scenarios |
| Reverse Leakage Current (IR) | 3.0 µA max at VR = 3.0 V - ensures minimal quiescent current in standby or low-power modes |
| Forward Voltage (VF) | 1.1 V max at IF = 100 mA - supports use as low-drop rectifier or clamping diode in bidirectional protection |
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; marking bar identifies this terminal for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms reverse-biased junction during Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener voltage tolerance | Enables tighter regulation accuracy than ±5 % variants, reducing need for post-calibration in precision references |
| Ultra-small SOD523 footprint | Reduces PCB area by >50 % vs. SOD323, critical for wearables, hearing aids, and miniaturized IoT sensors |
| Low 400 Ω differential resistance | Minimizes output voltage variation under ±1 mA load shifts, improving stability in feedback loops |
| −1.9 mV/K temperature coefficient | Allows predictable drift modeling for ambient-compensated voltage references in industrial temperature ranges |
| 40 W non-repetitive surge rating | Withstands short-duration transients without degradation, supporting robustness in noisy automotive or industrial environments |
Applications
| Microcontroller Reset Circuit | Portable Battery Voltage Monitor |
|---|---|
Use Scenario: Provides clean, stable reset threshold for ARM Cortex-M0+ MCUs operating from single-cell Li-ion (3.0–4.2 V). IC Role / Device Role / Timing Role: Zener diode acts as precision voltage comparator input reference, triggering reset when supply drops below 3.7 V. Use Value: Tight ±2 % tolerance ensures consistent reset voltage across production units, eliminating manual trimming. |
Use Scenario: Monitors battery voltage in Bluetooth earbuds to trigger low-battery warning at 3.6 V. IC Role / Device Role / Timing Role: Functions as analog voltage reference for ADC input scaling in fuel-gauge ICs. Use Value: Low 3.0 µA leakage preserves battery life during multi-week standby mode. |
| USB-C Port Overvoltage Clamp | Industrial Sensor Signal Conditioning |
Use Scenario: Protects USB-C data line receivers from accidental 5 V misconnection or ESD events. IC Role / Device Role / Timing Role: Clamps transient voltage to 3.9 V before it reaches downstream logic-level translators. Use Value: 40 W surge rating absorbs 100 µs ESD pulses without parametric shift or failure. |
Use Scenario: Stabilizes excitation voltage for 3.3 kΩ RTD bridge in factory-floor temperature transmitters. IC Role / Device Role / Timing Role: Supplies low-noise 3.9 V bias to Wheatstone bridge, rejecting supply ripple. Use Value: 400 Ω rdiff limits bridge voltage error to <0.4 mV under 1 mA sensor current variation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX585-C3V9,115 | ±5 % tolerance (3.71–4.10 V), higher 500 Ω rdiff, same SOD523 package | Acceptable where cost sensitivity outweighs regulation precision; less suitable for ADC reference rails | Select for cost-driven consumer electronics where ±5 % VZ meets system margin requirements |
| MMSZ4685T1G | ±5 % tolerance (3.7–4.1 V), 500 Ω rdiff, SOD-123 package (2.7 × 1.6 mm) | Larger footprint limits use in ultra-dense layouts; identical thermal derating curve | Choose when existing SOD-123 land pattern must be reused or higher power handling (500 mW) is required |
Compared with BZX585-C3V9,115 and MMSZ4685T1G, the BZX585-B3V9,115 delivers superior voltage accuracy and lower dynamic impedance in the smallest available footprint-making it optimal for high-density, precision-regulated subsystems where board space and regulation stability are co-critical.
Availability
BZX585-B3V9,115 is available at Aetrix Electronics and suitable for microcontroller reset circuits, portable battery monitors, USB-C port protection, and industrial sensor signal conditioning requiring stable component supply and long-term obsolescence management.
Supply support for BZX585-B3V9,115 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, with leadership in advanced packaging and automotive-qualified components.
The BZX585 series belongs to Nexperia's general-purpose Zener diode product line, engineered specifically for compact, low-power voltage regulation and clamping in space-constrained consumer, computing, and industrial applications.
FAQ
What is the maximum continuous reverse current for BZX585-B3V9,115 at 25 °C?
The maximum continuous reverse current is derived from Ptot = 300 mW and VZ ≈ 3.9 V, yielding IZ ≤ 77 mA. However, the datasheet specifies a recommended IZ range of 1–5 mA for stable regulation; operation above 5 mA increases self-heating and degrades voltage accuracy due to thermal coefficient effects.
Can BZX585-B3V9,115 be used in series for higher voltage regulation?
No-BZX585-B3V9,115 is not characterized or guaranteed for series operation. Zener voltage matching tolerance (±2 %) and unequal thermal coupling between devices cause current hogging and potential thermal runaway. Use a single higher-voltage Zener (e.g., BZX585-B10) instead.
Is the SOD523 package compatible with standard reflow profiles?
Yes-the SOD523 package is qualified for lead-free reflow per J-STD-020. The recommended footprint (Fig. 12) uses 0.5 mm pad width, 0.4 mm solder mask opening, and 2.15 mm center-to-center spacing. Peak temperature must not exceed 260 °C for ≤30 seconds to avoid delamination.
How does the −1.9 mV/K temperature coefficient affect performance at 85 °C ambient?
At 85 °C ambient (ΔT = +60 K), the Zener voltage shifts by −114 mV (−1.9 mV/K × 60 K), resulting in VZ ≈ 3.87 V. This 0.56 % drift remains within system-level tolerance budgets for most non-precision applications; for tighter stability, pair with a positive-TC component or use temperature-compensated references.
BZX585-B3V9,115 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:
- ±2%
- 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 (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
BZX585-B3V9,115 FAQ
1.How can I place an order for BZX585-B3V9,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX585-B3V9,115 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-B3V9,115 reliable?
The price and inventory of BZX585-B3V9,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX585-B3V9,115 is usually 5 days.
3.What payment methods are accepted for BZX585-B3V9,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX585-B3V9,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX585-B3V9,115?
BZX585-B3V9,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX585-B3V9,115 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-B3V9,115?
For technical support, including BZX585-B3V9,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX585-B3V9,115 requirements.
6.How does Aetrix verify that BZX585-B3V9,115 is sourced from the original manufacturer or authorized distributors?
All BZX585-B3V9,115 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-B3V9,115 meets industry standards.
7.What is the process for return or replacement of BZX585-B3V9,115?
All BZX585-B3V9,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX585-B3V9,115, 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-B3V9,115 part is unused and in its original packaging.
Return procedure for BZX585-B3V9,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX585-B3V9,115 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
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SMAJ4744A-TP
Micro Commercial Co
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SMAZ12-13-F
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