My Inquiry
My Account
Nexperia USA Inc. BZX585-B4V3,115
- Part No.:
- BZX585-B4V3,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX585-B4V3,115.pdf
- Description:
- DIODE ZENER 4.3V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:1,503
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX585-B4V3,115 from Nexperia is a 4.3 V ±2 % Zener voltage regulator diode in SOD523 (SC-79) 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-B4V3,115 datasheet, BZX585-B4V3,115 pinout, BZX585-B4V3,115 application, or BZX585-B4V3,115 equivalent, this part supports stable reference generation, overvoltage clamping, and low-current biasing where ultra-small footprint and tight voltage tolerance are critical.
Technical Context
This Zener diode operates in reverse breakdown with a nominal Zener voltage of 4.3 V at 5 mA test current, exhibiting a typical differential resistance of 410 Ω at IZ = 5 mA and a temperature coefficient of −3.5 to −1.7 mV/K across its operating range.
It features low forward voltage (≤1.1 V at 100 mA), low reverse leakage (≤3.0 µA at 1 V), and fast transient response enabled by its 3.0 pF junction capacitance at 0 V - all optimized for compact, low-power regulation and protection circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.3 V ±2 % at IZ = 5 mA - ensures precise voltage reference stability for feedback loops and threshold detection |
| Total Power Dissipation | 300 mW at Tamb = 25 °C - defines continuous DC power handling on standard FR4 PCB with 35 mm² copper area |
| Non-repetitive Peak Reverse Power | 40 W at tp = 100 µs - enables robust transient surge suppression without device failure |
| Differential Resistance | 410 Ω (typ) at IZ = 5 mA - determines regulation accuracy under load variation |
| Junction-to-Ambient Thermal Resistance | 350 K/W - limits temperature rise during steady-state operation in free air |
| Reverse Leakage Current | ≤3.0 µA at VR = 1 V - minimizes quiescent current in battery-powered standby circuits |
| Junction Capacitance | 3.0 pF at f = 1 MHz, VR = 0 V - preserves high-frequency signal integrity in RF bias or timing networks |
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 rail; completes reverse-bias path for regulation |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-compact SMD footprint | SOD523 package (1.25 × 0.85 mm) enables placement in dense portable electronics layouts |
| Tight voltage tolerance | ±2 % Zener voltage accuracy improves reference stability without external trimming |
| Low thermal resistance to solder point | 65 K/W junction-to-solder-point - enhances reliability under pulsed power stress |
| Controlled temperature coefficient | −3.5 to −1.7 mV/K - allows predictable drift compensation in temperature-sensitive references |
| Low junction capacitance | 3.0 pF - avoids signal coupling or phase shift in high-speed bias networks |
Applications
| USB Port Overvoltage Protection | Microcontroller Reset Circuit |
|---|---|
|
Use Scenario: Clamps transient surges on 5 V USB VBUS line to prevent damage to downstream ICs. IC Role / Device Role / Timing Role: Zener acts as shunt clamp, conducting excess energy when VBUS exceeds 4.3 V + margin. Use Value: 40 W peak power rating absorbs 100 µs ESD-like transients without degradation, preserving system uptime. |
Use Scenario: Generates clean 4.3 V reset threshold for 3.3 V microcontrollers with brown-out detection. IC Role / Device Role / Timing Role: Provides stable reference voltage to reset supervisor IC input or comparator. Use Value: ±2 % tolerance ensures reset assertion within 3.3 V supply tolerance band, avoiding spurious resets. |
| Low-Power Sensor Biasing | LED Current Regulation |
|
Use Scenario: Supplies stable bias voltage to analog sensor front-ends in battery-operated IoT nodes. IC Role / Device Role / Timing Role: Functions as low-current voltage reference for op-amp gain-setting or ADC reference divider. Use Value: ≤3.0 µA reverse leakage at 1 V extends battery life in multi-year deployments. |
Use Scenario: Sets constant current for indicator LEDs in wearables and handheld devices. IC Role / Device Role / Timing Role: Shunt regulator in series with LED and current-limiting resistor to stabilize forward voltage. Use Value: 410 Ω differential resistance maintains <±5 % current variation across 10–100 mA LED drive range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5225BS-7-F | 4.3 V ±5 %, SOT-323 package (2.1 × 1.25 mm), 350 mW Ptot | Larger footprint; higher power but looser tolerance | Select when board space permits and ±5 % regulation suffices |
| BZX384-B4V3 | 4.3 V ±2 %, SOD-323 package (1.7 × 1.25 mm), 300 mW Ptot, rdiff = 300 Ω | 25 % larger footprint; lower differential resistance improves regulation linearity | Select when tighter dynamic regulation is required and SOD-323 is acceptable |
Compared with MMBZ5225BS-7-F, BZX585-B4V3,115 offers superior voltage accuracy and smaller size; compared with BZX384-B4V3, it trades 130 Ω higher differential resistance for 30 % smaller board area - favoring miniaturized designs where moderate regulation linearity is sufficient.
Availability
BZX585-B4V3,115 is available at Aetrix Electronics and suitable for USB protection circuits, microcontroller reset networks, low-power sensor biasing, and LED current regulation requiring stable component supply and traceable sourcing.
Supply support for BZX585-B4V3,115 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 leading global semiconductor manufacturer specializing in high-performance, reliable discrete and logic devices for automotive, industrial, and consumer markets.
The BZX585 series belongs to Nexperia's general-purpose Zener diode product line, engineered for compact, cost-effective voltage regulation and clamping in space- and power-constrained applications.
FAQ
What is the maximum continuous reverse current for BZX585-B4V3,115?
The maximum continuous reverse current is derived from its 300 mW total power dissipation and 4.3 V Zener voltage, yielding approximately 70 mA (300 mW ÷ 4.3 V). This assumes ambient temperature of 25 °C on an FR4 PCB with 35 mm² copper at the cathode tab, per datasheet condition.
Can BZX585-B4V3,115 be used in place of a 3.3 V Zener diode?
No - BZX585-B4V3,115 has a nominal Zener voltage of 4.3 V, not 3.3 V. Substituting it for a 3.3 V device would result in incorrect regulation or clamping thresholds. For 3.3 V regulation, use BZX585-B3V3,115 (3.3 V ±2 %) instead.
Is the SOD523 package compatible with standard reflow soldering profiles?
Yes - Nexperia specifies compatibility with JEDEC J-STD-020D reflow profiles. The recommended reflow footprint (Fig. 12) uses 0.5 mm pad width, 1.4 mm pad length, and 0.4 mm solder mask opening, supporting both leaded and lead-free processes with peak temperatures up to 260 °C.
Does BZX585-B4V3,115 have automotive qualification?
No - the BZX585 series is not AEC-Q200 qualified. It is intended for commercial and industrial applications only. For automotive-grade Zener diodes, consider Nexperia's Automotive Qualified BZX84 series or consult Aetrix for AEC-Q200-compliant alternatives.
BZX585-B4V3,115 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:
- ±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
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
BZX585-B4V3,115 FAQ
1.How can I place an order for BZX585-B4V3,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX585-B4V3,115 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-B4V3,115 reliable?
The price and inventory of BZX585-B4V3,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX585-B4V3,115 is usually 5 days.
3.What payment methods are accepted for BZX585-B4V3,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX585-B4V3,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX585-B4V3,115?
BZX585-B4V3,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX585-B4V3,115 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-B4V3,115?
For technical support, including BZX585-B4V3,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX585-B4V3,115 requirements.
6.How does Aetrix verify that BZX585-B4V3,115 is sourced from the original manufacturer or authorized distributors?
All BZX585-B4V3,115 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-B4V3,115 meets industry standards.
7.What is the process for return or replacement of BZX585-B4V3,115?
All BZX585-B4V3,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX585-B4V3,115, 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-B4V3,115 part is unused and in its original packaging.
Return procedure for BZX585-B4V3,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX585-B4V3,115 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
