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Nexperia USA Inc. BZX585-B4V7,115
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- Part No.:
- BZX585-B4V7,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX585-B4V7,115.pdf
- Description:
- DIODE ZENER 4.7V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:431
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Product details
Overview
BZX585-B4V7,115 from Nexperia is a ±2 % tolerance Zener diode in SOD523 (SC-79) package, rated for 4.7 V nominal regulation at 5 mA, with 300 mW total power dissipation and 40 W non-repetitive peak reverse power handling. It serves as a precision voltage reference or overvoltage clamp in low-power analog signal conditioning, microcontroller I/O protection, and battery-powered sensor interface circuits.
For engineers reviewing the BZX585-B4V7,115 datasheet, BZX585-B4V7,115 pinout, BZX585-B4V7,115 application, or BZX585-B4V7,115 equivalent, this device is selected for compact voltage stabilization where tight tolerance, low differential resistance (425 Ω typ. at 5 mA), and ultra-small footprint are critical - especially in space-constrained portable electronics and wearables.
Technical Context
This Zener operates in reverse breakdown mode with a specified working voltage of 4.61 V to 4.79 V at 5 mA test current, exhibiting a temperature coefficient of −3.5 mV/K to −1.2 mV/K across its operating range. Its low 425 Ω typical differential resistance ensures stable regulation under small load variations.
The device supports pulsed surge immunity up to 40 W for 100 µs square-wave transients at 25 °C junction temperature, while maintaining continuous operation within 300 mW total power dissipation on FR4 PCB with 35 mm² copper area at the cathode tab.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage (VZ) | 4.7 V at IZ = 5 mA - defines precise clamping/reference level for low-voltage rail stabilization |
| Tolerance | ±2 % - enables tighter regulation accuracy vs. ±5 % variants, reducing system calibration burden |
| Differential Resistance (rdiff) | 425 Ω typ. at IZ = 5 mA - low impedance improves regulation stability against current fluctuations |
| Total Power Dissipation (Ptot) | 300 mW at Tamb = 25 °C - sets maximum continuous DC power handling on standard FR4 layout |
| Non-repetitive Peak Reverse Power (PZSM) | 40 W for tp = 100 µs - supports transient overvoltage suppression without failure |
| Reverse Current (IR) | 3.0 µA max at VR = 3.0 V - ensures minimal leakage in standby or high-impedance bias networks |
| Junction-to-Ambient Thermal Resistance | 350 K/W - confirms thermal derating necessity in enclosed or high-ambient environments |
Pinout & Package
Package: SOD523 (SC-79), ultra-small flat-lead surface-mount plastic package with cathode band marking; dimensions: 1.25 mm × 0.85 mm × 0.65 mm (L × W × H), 2-terminal configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (marked side) | Cathode (K) | Connected to regulated output node; reverse-biased terminal where Zener breakdown occurs |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path for regulation |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-compact SOD523 footprint | Enables placement in <1.1 mm² board area - ideal for wearables and miniaturized IoT sensors |
| ±2 % voltage tolerance | Reduces need for post-assembly trimming in precision reference designs (e.g., ADC biasing) |
| Low differential resistance | 425 Ω typ. minimizes output voltage shift under ±0.5 mA load variation - critical for stable sensor excitation |
| 40 W surge capability | Withstands ESD-like transients per IEC 61000-4-2 Level 4 without derating or external TVS |
| −3.5 to −1.2 mV/K tempco | Predictable negative drift allows compensation in temperature-sensitive analog front-ends |
Applications
| Microcontroller I/O Protection | Low-Power Sensor Reference |
|---|---|
Use Scenario: Clamping 3.3 V GPIO lines against ESD or supply overshoot in ARM Cortex-M0+ systems. IC Role / Device Role / Timing Role: Zener diode acting as shunt overvoltage protector between I/O pin and ground. Use Value: 4.7 V breakdown prevents damage to 3.3 V tolerant inputs while adding <0.1 mm² PCB area. |
Use Scenario: Providing stable 4.7 V reference for thermistor biasing in battery-operated environmental monitors. IC Role / Device Role / Timing Role: Precision voltage source for ratiometric measurement circuitry. Use Value: ±2 % tolerance and low 425 Ω rdiff ensure <0.5 % reference error across 0–50 °C ambient range. |
| Portable Device Power Rail Clamp | Wearable Battery Voltage Monitor |
Use Scenario: Limiting Li-ion charger output to 4.7 V during pre-charge phase in compact health trackers. IC Role / Device Role / Timing Role: Shunt regulator clamping unregulated LDO input before enable. Use Value: 300 mW Ptot handles brief 100 mA surges without thermal runaway in sealed enclosures. |
Use Scenario: Detecting end-of-charge via voltage threshold comparison in Bluetooth earbuds. IC Role / Device Role / Timing Role: Fixed reference for comparator-based battery state detection. Use Value: Low 3.0 µA IR at 3.0 V ensures <10 nA quiescent current drain - extending shelf life by >6 months. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX585-C4V7,115 | ±5 % tolerance (vs. ±2 %); identical package, VZ range 4.47–4.94 V | Acceptable where cost sensitivity outweighs precision; higher rdiff (500 Ω max) | Select when budget constraints dominate and system-level calibration compensates for tolerance |
| MMSZ4702T1G | ±5 % tolerance; SOD-123 package (2.7 × 1.6 mm); 500 mW Ptot; 30 Ω rdiff typ. | Higher power and lower impedance, but 3× larger footprint limits use in ultra-dense layouts | Choose only if board space permits and lower dynamic impedance is required for fast-switching loads |
Compared with BZX585-C4V7,115, the BZX585-B4V7,115 delivers tighter regulation accuracy and lower dynamic impedance in the same ultra-miniature footprint; versus MMSZ4702T1G, it trades off power handling and rdiff for 60 % smaller board area - making it optimal for size-critical portable designs.
Availability
BZX585-B4V7,115 is available at Aetrix Electronics and suitable for microcontroller I/O protection, low-power sensor reference, and portable device power rail clamp applications requiring stable component supply, consistent parametric performance, and long-term obsolescence management.
Supply support for BZX585-B4V7,115 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, serving automotive, industrial, and consumer markets with scalable manufacturing and rigorous quality control.
The BZX585 series belongs to Nexperia's general-purpose Zener diode product line, engineered specifically for space-constrained voltage regulation and transient suppression in battery-powered and portable electronics.
FAQ
What is the maximum continuous reverse current the BZX585-B4V7,115 can sustain?
The device has no specified maximum continuous reverse current rating; instead, its safe operating limit is defined by total power dissipation. At 4.7 V Zener voltage, the maximum steady-state reverse current is approximately 63.8 mA (300 mW ÷ 4.7 V), assuming 25 °C ambient and proper PCB copper area per datasheet conditions.
Does the BZX585-B4V7,115 require a series current-limiting resistor in all applications?
Yes - a series resistor is mandatory to limit reverse current to values within the 300 mW power rating and prevent thermal runaway. For example, with a 5 V supply and 4.7 V Zener, a minimum 47 Ω resistor limits current to ~64 mA at full power, matching the device's thermal capability on standard FR4.
How does the cathode band marking align with the SOD523 package outline?
The cathode band is located on the top surface adjacent to Pin 1, which corresponds to the leftmost lead when viewing the package with the marking band facing upward and leads pointing downward - matching the "cathode band" label and pin numbering in Figure 11 of the Nexperia datasheet Rev. 8.
Can the BZX585-B4V7,115 be used in place of a 5.1 V Zener for undervoltage lockout (UVLO)?
No - its 4.61–4.79 V breakdown range is below typical 5.1 V UVLO thresholds. Substituting would cause premature shutdown; a BZX585-B5V1,115 (5.00–5.20 V) or BZX585-C5V1,115 is required to meet standard 5 V system UVLO specifications.
BZX585-B4V7,115 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):
- 4.7 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 2 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-B4V7,115 FAQ
1.How can I place an order for BZX585-B4V7,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX585-B4V7,115 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-B4V7,115 reliable?
The price and inventory of BZX585-B4V7,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX585-B4V7,115 is usually 5 days.
3.What payment methods are accepted for BZX585-B4V7,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX585-B4V7,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX585-B4V7,115?
BZX585-B4V7,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX585-B4V7,115 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-B4V7,115?
For technical support, including BZX585-B4V7,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX585-B4V7,115 requirements.
6.How does Aetrix verify that BZX585-B4V7,115 is sourced from the original manufacturer or authorized distributors?
All BZX585-B4V7,115 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-B4V7,115 meets industry standards.
7.What is the process for return or replacement of BZX585-B4V7,115?
All BZX585-B4V7,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX585-B4V7,115, 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-B4V7,115 part is unused and in its original packaging.
Return procedure for BZX585-B4V7,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX585-B4V7,115 Tags
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BZT52C15S-7-F
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MM5Z5V1ST1G
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