My Inquiry
My Account
Nexperia USA Inc. BZX384-B3V3,115
- Part No.:
- BZX384-B3V3,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-B3V3,115.pdf
- Description:
- DIODE ZENER 3.3V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:18,870
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX384-B3V3,115 from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 3.3 V nominal breakdown at 5 mA, with 300 mW total power dissipation and 40 W non-repetitive peak reverse power capability. It serves as a precision reference or overvoltage clamp in low-power analog sensing and microcontroller I/O protection circuits.
For engineers reviewing the BZX384-B3V3,115 datasheet, BZX384-B3V3,115 pinout, BZX384-B3V3,115 application, or BZX384-B3V3,115 equivalent, this page delivers verified electrical parameters, thermal behavior, cathode/anode terminal mapping, real-world regulation use cases, and validated alternative parts for supply continuity and design flexibility.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain stable 3.3 V across its terminals under regulated current conditions. Its differential resistance of ≤95 Ω at 5 mA ensures minimal voltage deviation during load transients, while the −3.5 mV/K temperature coefficient enables predictable drift compensation in ambient-varying environments.
The device is optimized for surface-mount applications on FR4 PCBs with single-sided copper, delivering 415 K/W junction-to-ambient thermal resistance in free air and 110 K/W junction-to-solder-point resistance-critical for thermal reliability in space-constrained designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage (VZ) | 3.23 V to 3.37 V at IZ = 5 mA - defines tight regulation window for 3.3 V rail referencing |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard PCB |
| Differential Resistance (rdif) | ≤95 Ω at IZ = 5 mA - determines output impedance and load regulation error |
| Reverse Current (IR) | ≤5 μA at VR = 1 V - ensures low leakage in standby or high-impedance bias networks |
| Non-repetitive Peak Power (PZSM) | 40 W for tp = 100 μs - supports transient surge suppression without failure |
| Forward Voltage (VF) | 0.9 V at IF = 10 mA - confirms low conduction loss when used in forward-biased protection paths |
| Junction Temperature (Tj) | −65 °C to +150 °C - validates operation across industrial and extended commercial temperature ranges |
Pinout & Package
Package: SOD323 (SC-76), plastic surface-mounted, 2-terminal device with cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity marker (bar) aligns with this pin for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential reference; completes reverse-bias path for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % voltage tolerance | Enables accurate 3.3 V reference without post-production trimming in cost-sensitive consumer and industrial systems |
| 300 mW power rating | Supports sustained regulation in low-current sensor interfaces and MCU reset circuits without heatsinking |
| 40 W surge capability | Withstands ESD and inductive kick events per IEC 61000-4-2 Level 4 without degradation |
| SOD323 footprint | Reduces board area by >50 % vs. DO-35; compatible with standard reflow profiles and automated placement |
| −3.5 mV/K tempco | Allows predictable voltage shift over temperature-enabling software compensation in precision ADC references |
Applications
| Microcontroller I/O Protection | Low-Power Sensor Reference |
|---|---|
Use Scenario: Clamping 3.3 V GPIO lines against ESD and overvoltage transients in battery-powered IoT nodes. IC Role / Device Role: Zener shunt clamp placed between I/O pin and ground, conducting only above 3.3 V threshold. Use Value: Limits pin voltage to ≤3.37 V under surge, preventing damage to 3.3 V-tolerant MCU inputs while drawing <5 μA leakage at 1 V reverse bias. |
Use Scenario: Providing stable 3.3 V reference for analog front-end of temperature/humidity sensors. IC Role / Device Role: Precision voltage reference source for ADC biasing and sensor excitation circuitry. Use Value: Delivers 3.23–3.37 V with ≤95 Ω dynamic impedance, reducing measurement error to <0.5 % over 0–70 °C ambient range. |
| Power Rail Monitoring | USB-C VBUS Clamp |
Use Scenario: Detecting brown-out conditions on 3.3 V supply rails using comparator input tied to Zener-regulated node. IC Role / Device Role: Stable voltage reference feeding comparator's inverting input for accurate undervoltage detection. Use Value: Maintains reference stability within ±0.14 V over full operating temperature, enabling reliable 3.0 V trip point with 50 mV hysteresis. |
Use Scenario: Limiting VBUS voltage spikes during hot-plug events in USB-C peripheral designs. IC Role / Device Role: Secondary overvoltage clamp parallel to primary TVS, activated above 3.37 V to reduce clamping overshoot. Use Value: Engages before main TVS triggers, lowering peak clamped voltage by 120 mV and reducing stress on downstream LDOs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5226BS-7-F | 3.3 V ±5 % tolerance; 200 mW Ptot; SOT-23 package | Higher leakage (≤50 μA at 1 V); larger footprint; lower surge rating (25 W) | Acceptable where cost is critical and thermal margin exceeds 100 °C/W |
| BZX84-C3V3,215 | 3.3 V ±5 % tolerance; 300 mW Ptot; SOT-23 package | Same power rating but wider tolerance; higher rdif (≤120 Ω); no guaranteed tempco spec | Preferred for legacy SOT-23 layouts where ±5 % accuracy suffices and thermal resistance <300 K/W is available |
Compared with BZX384-B3V3,115, MMBZ5226BS-7-F trades tighter board area for reduced surge robustness and looser regulation, while BZX84-C3V3,215 retains power capability but sacrifices voltage accuracy and thermal performance-making the BZX384-B3V3,115 optimal for new designs demanding ±2 % stability and SOD323 miniaturization.
Availability
BZX384-B3V3,115 is available at Aetrix Electronics and suitable for microcontroller I/O protection, low-power sensor reference, and power rail monitoring requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for BZX384-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 focused on high-volume, high-reliability logic, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.
The BZX384 series belongs to Nexperia's precision Zener regulator portfolio, engineered specifically for compact, low-power voltage reference and clamping applications in space-constrained PCBs.
FAQ
What is the maximum continuous reverse current for BZX384-B3V3,115?
The device is rated for 250 mA maximum forward current, but continuous reverse (Zener) current is limited by power dissipation: at 25 °C ambient, IZ must stay ≤91 mA to remain within 300 mW Ptot. Derating applies above 25 °C per the 415 K/W thermal resistance specification.
Can BZX384-B3V3,115 be used in place of a 3.3 V linear regulator?
No-it functions only as a shunt regulator, requiring an external current-limiting resistor and providing no active regulation or load current sourcing. It replaces regulators only in ultra-low-current (<1 mA) reference or clamping roles, not as a standalone 3.3 V supply.
How does the marking code 'K4' relate to BZX384-B3V3,115?
'K4' is the top-side laser marking for BZX384-B3V3,115 per Table 4 of the datasheet. The 'K' denotes the ±2 % tolerance series (BZX384-B), and '4' corresponds to the 3.3 V breakdown voltage variant within that series.
Is BZX384-B3V3,115 qualified for automotive applications?
No-Rev. 4 of the datasheet explicitly states these parts are non-automotive qualified. Automotive alternatives (e.g., BZX384-Q series) are available from Nexperia but require separate part numbers and qualification documentation.
BZX384-B3V3,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX384
- Package/Case:
- SC-76, SOD-323
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX384-B3V3,115 FAQ
1.How can I place an order for BZX384-B3V3,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-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 BZX384-B3V3,115 reliable?
The price and inventory of BZX384-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 BZX384-B3V3,115 is usually 5 days.
3.What payment methods are accepted for BZX384-B3V3,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-B3V3,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-B3V3,115?
BZX384-B3V3,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-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 BZX384-B3V3,115?
For technical support, including BZX384-B3V3,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-B3V3,115 requirements.
6.How does Aetrix verify that BZX384-B3V3,115 is sourced from the original manufacturer or authorized distributors?
All BZX384-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 BZX384-B3V3,115 meets industry standards.
7.What is the process for return or replacement of BZX384-B3V3,115?
All BZX384-B3V3,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-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 BZX384-B3V3,115 part is unused and in its original packaging.
Return procedure for BZX384-B3V3,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-B3V3,115 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…
