My Inquiry
My Account
Nexperia USA Inc. BZX384-A5V1X
- Part No.:
- BZX384-A5V1X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-A5V1X.pdf
- Description:
- DIODE ZENER 5.1V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:5,378
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX384-A5V1X from Nexperia is a ±1 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 5.1 V nominal breakdown voltage at 5 mA, 300 mW total power dissipation, and 40 W non-repetitive peak reverse power. It serves as a precision reference or overvoltage clamp in low-power analog signal conditioning and power rail stabilization circuits.
For engineers reviewing the BZX384-A5V1X datasheet, BZX384-A5V1X pinout, BZX384-A5V1X application, or BZX384-A5V1X equivalent, key selection criteria include its tight ±1 % tolerance, low 480 Ω differential resistance at 5 mA, -2.7 mV/K temperature coefficient, and compatibility with standard FR4 PCB thermal management per IEC 60134 limiting values.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain stable voltage across load variations and supply fluctuations. Its 5.1 V nominal Zener voltage is specified at 5 mA test current with ±1 % tolerance, and it exhibits a negative temperature coefficient of -2.7 mV/K, enabling predictable drift compensation in reference designs.
The device supports pulsed operation up to 40 W non-repetitive peak reverse power (tp = 100 μs), while continuous DC dissipation is limited to 300 mW at Tamb ≤ 25 °C on standard FR4 PCB. Junction-to-ambient thermal resistance is 415 K/W, confirming suitability for compact, low-power surface-mount applications without forced cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.04 V to 5.16 V at IZ = 5 mA - defines precise regulation point for feedback loops or reference rails |
| Tolerance | ±1 % - enables high-accuracy voltage references without post-calibration |
| Differential Resistance (rdif) | 480 Ω max at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Reverse Current (IR) | 2 μA max at VR = 3.5 V - ensures minimal leakage in standby or high-impedance bias networks |
| Temperature Coefficient (SZ) | -2.7 mV/K at IZ = 5 mA - quantifies voltage drift over operating temperature range |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C on FR4 PCB - sets maximum continuous DC power handling under standard layout |
| Non-repetitive Peak Power (PZSM) | 40 W at tp = 100 μs - supports transient surge suppression in ESD or inductive kick protection |
Pinout & Package
The BZX384-A5V1X is housed in a SOD323 (SC-76) plastic surface-mounted package with two terminals: anode (A) and cathode (K). The cathode is marked by a bar on the device body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity marker determines reverse-bias orientation for Zener operation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path for voltage clamping |
Key Features
| Feature | Design Value |
|---|---|
| ±1 % Zener voltage tolerance | Enables direct use in 1 % reference designs without trimming or calibration |
| Low differential resistance (480 Ω max) | Minimizes output voltage variation under load current changes up to 5 mA |
| Controlled temperature coefficient (-2.7 mV/K) | Allows predictable thermal drift modeling in precision analog circuits |
| 40 W non-repetitive peak power rating | Provides robustness against short-duration transients like ESD or switching spikes |
| SOD323 footprint compatibility | Supports high-density PCB layouts with standardized reflow soldering profiles per JEDEC MS-012 |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
|
Use Scenario: Stabilizing feedback voltage in low-current linear regulators or op-amp reference inputs. IC Role / Device Role / Timing Role: Zener diode providing fixed 5.1 V reference voltage to error amplifier input. Use Value: ±1 % tolerance ensures output accuracy within 51 mV; 480 Ω rdif limits regulation error to <10 mV over 20 mA load step. |
Use Scenario: Protecting microcontroller I/O pins from transient overvoltage events. IC Role / Device Role / Timing Role: Shunt clamp absorbing surge energy before it reaches sensitive logic inputs. Use Value: 40 W peak power rating handles 100 μs ESD pulses; 2 μA leakage preserves high-impedance input integrity. |
| Signal Level Translation | Current Source Biasing |
|
Use Scenario: Converting 3.3 V logic signals to 5 V compatible levels using passive level-shifting networks. IC Role / Device Role / Timing Role: Clamping reference node to 5.1 V while allowing bidirectional signal swing below that threshold. Use Value: Low 0.9 V forward voltage at 10 mA enables clean low-side switching; tight tolerance avoids false triggering. |
Use Scenario: Setting bias current for low-noise JFET amplifiers or LED drivers requiring stable current sources. IC Role / Device Role / Timing Role: Voltage reference defining emitter/base voltage drop in constant-current mirror configurations. Use Value: -2.7 mV/K temperature coefficient matches transistor VBE drift, improving thermal stability of bias current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5222BS-7-F | ±5 % tolerance, 5.1 V nominal, SOT-323 package, 225 mW Ptot | Lower accuracy and power rating; suitable only for non-critical biasing | Select when cost sensitivity outweighs regulation precision and thermal margin |
| BZX84-C5V1 | ±5 % tolerance, 5.1 V nominal, SOT-23 package, 300 mW Ptot, higher rdif (600 Ω) | Looser tolerance and higher dynamic impedance reduce reference stability | Choose for legacy SOT-23 board compatibility where ±5 % accuracy is acceptable |
Compared with MMBZ5222BS-7-F and BZX84-C5V1, the BZX384-A5V1X delivers superior voltage accuracy (±1 % vs. ±5 %), lower dynamic impedance (480 Ω vs. ≥600 Ω), and identical 300 mW power rating-making it optimal for precision reference and low-drift biasing where layout space permits SOD323.
Availability
BZX384-A5V1X is available at Aetrix Electronics and suitable for power supply reference design, overvoltage protection circuits, signal level translation, and current source biasing requiring stable component supply and traceable sourcing.
Supply support for BZX384-A5V1X 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 manufacturer headquartered in Nijmegen, Netherlands, specializing in high-volume, high-reliability discrete and logic devices for consumer, industrial, and communications markets.
The BZX384 series belongs to Nexperia's precision Zener diode product line, engineered specifically for low-power voltage regulation and reference applications demanding tight tolerance, low leakage, and robust transient performance in miniature SMD packages.
FAQ
What is the maximum continuous reverse current the BZX384-A5V1X can sustain?
The BZX384-A5V1X is not rated for continuous reverse current; it operates in Zener breakdown mode with a maximum DC power dissipation of 300 mW at 25 °C ambient. At its 5.1 V Zener voltage, this corresponds to approximately 59 mA average reverse current under ideal thermal conditions. Exceeding this value risks thermal runaway due to junction temperature exceeding 150 °C.
Does the BZX384-A5V1X require a series current-limiting resistor in all applications?
Yes-a series current-limiting resistor is mandatory to prevent destructive overcurrent during Zener conduction. For example, when regulating from a 12 V supply, a minimum 120 Ω resistor limits current to 5 mA at 5.1 V output. The resistor value must be calculated based on worst-case supply voltage, desired Zener current, and power derating above 25 °C ambient.
How does the -2.7 mV/K temperature coefficient affect circuit performance?
The negative temperature coefficient means the Zener voltage decreases by 2.7 mV per Kelvin rise in junction temperature. Over a 100 °C range (25 °C to 125 °C), this results in ~270 mV total drift. In precision references, this drift must be compensated via circuit topology (e.g., combining with positive-TC components) or calibrated out in system-level firmware.
Can the BZX384-A5V1X be used in place of a TL431 adjustable shunt regulator?
No-it cannot replace a TL431 because it lacks internal error amplifier, reference, and output stage functionality. The BZX384-A5V1X is a passive two-terminal device providing fixed 5.1 V regulation, whereas the TL431 is an active three-terminal programmable shunt regulator capable of adjustable output (2.5 V to 36 V) with higher accuracy and sink current capability (up to 100 mA).
BZX384-A5V1X 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):
- 5.1 V
- Tolerance:
- ±1%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 60 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 2 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX384-A5V1X FAQ
1.How can I place an order for BZX384-A5V1X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-A5V1X 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-A5V1X reliable?
The price and inventory of BZX384-A5V1X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-A5V1X is usually 5 days.
3.What payment methods are accepted for BZX384-A5V1X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-A5V1X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-A5V1X?
BZX384-A5V1X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-A5V1X 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-A5V1X?
For technical support, including BZX384-A5V1X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-A5V1X requirements.
6.How does Aetrix verify that BZX384-A5V1X is sourced from the original manufacturer or authorized distributors?
All BZX384-A5V1X 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-A5V1X meets industry standards.
7.What is the process for return or replacement of BZX384-A5V1X?
All BZX384-A5V1X units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-A5V1X, 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-A5V1X part is unused and in its original packaging.
Return procedure for BZX384-A5V1X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-A5V1X 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…
