My Inquiry
My Account
NXP Semiconductors BZX384-B75/ZLX
- Part No.:
- BZX384-B75/ZLX
- Manufacturer:
- NXP Semiconductors
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-B75/ZLX.pdf
- Description:
- DIODE ZENER 75V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:9,605
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX384-B75/ZLX from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 75 V nominal breakdown voltage at IZ = 2 mA, 300 mW total power dissipation, and 150 °C maximum junction temperature - used for precision low-power voltage reference and overvoltage protection in space-constrained consumer and industrial power rails.
For engineers reviewing the BZX384-B75/ZLX datasheet, BZX384-B75/ZLX pinout, BZX384-B75/ZLX application, or BZX384-B75/ZLX equivalent, key selection criteria include its 75 V Zener voltage with ±2 % tolerance, 500 Ω max differential resistance at 2 mA, 0.05 μA reverse current at VR = 57 V, thermal resistance of 415 K/W (junction-to-ambient), and compatibility with reflow/wave soldering per IPC-7095.
Technical Context
The BZX384-B75/ZLX operates as a two-terminal silicon planar Zener diode, leveraging controlled avalanche breakdown at 75 V to maintain stable reverse-bias regulation. Its design targets low-current reference applications where tight voltage tolerance and minimal temperature drift are critical.
It exhibits a positive temperature coefficient of +52.5 mV/K at IZ = 2 mA, enabling predictable drift compensation in bias networks. The device supports non-repetitive peak reverse currents up to 0.20 A (100 μs pulse) and withstands ambient temperatures from –65 °C to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 75 V nominal at IZ = 2 mA; ±2 % tolerance ensures 73.5–76.5 V regulation window under production conditions. |
| Differential Resistance (rdif) | ≤500 Ω max at IZ = 2 mA; limits output impedance for stable regulation under varying load current. |
| Reverse Current (IR) | ≤0.05 μA at VR = 57 V; enables ultra-low leakage in high-impedance reference circuits. |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C on FR4 PCB; defines maximum continuous DC power handling before thermal derating. |
| Junction-to-Ambient Thermal Resistance (Rth(j-a)) | 415 K/W; determines temperature rise per watt in free-air mounting - critical for thermal margin analysis. |
| Non-Repetitive Peak Reverse Current (IZSM) | 0.20 A at tp = 100 μs; supports transient surge suppression without permanent degradation. |
| Forward Voltage (VF) | ≤0.9 V at IF = 10 mA; confirms low conduction loss when used in forward-biased clamp or indicator roles. |
Pinout & Package
SOD323 (SC-76) surface-mount plastic package: 2.3 mm × 1.35 mm body, 0.45 mm height, cathode-marked with bar on terminal 1; optimized for automated placement and IPC-7095-compliant reflow/wave soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Connected to regulated output node; marking bar identifies this terminal - reverse-bias voltage applied between K and A establishes Zener conduction. |
| 2 (A) | Anode | Connected to circuit ground or lower-potential rail; completes current path during regulation; polarity must be observed to avoid forward conduction. |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener voltage tolerance | Enables tighter regulation than ±5 % variants (BZX384-C), reducing need for post-regulation trimming in precision references. |
| Low differential resistance (≤500 Ω) | Minimizes output voltage variation across load current changes - critical for stable feedback in LDO bias networks. |
| Ultra-low reverse leakage (≤0.05 μA @ 57 V) | Preserves signal integrity in high-impedance sensor biasing and analog front-end protection circuits. |
| 150 °C maximum junction temperature | Supports operation in thermally demanding environments such as enclosed power supplies and automotive under-hood modules. |
| Non-repetitive peak power rating (40 W) | Provides robustness against ESD and line transients without external TVS - simplifies protection architecture. |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
|
Use Scenario: Providing stable 75 V reference for feedback divider in isolated flyback converter secondary-side regulation. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to fix reference node voltage independent of input ripple or load variation. Use Value: ±2 % tolerance and 500 Ω rdif ensure <±0.8 V output deviation across production units and load steps - eliminating need for manual calibration. |
Use Scenario: Clamping microcontroller I/O rail against 80 V surge events in industrial control inputs. IC Role / Device Role / Timing Role: Two-terminal passive clamp absorbing transient energy by entering controlled avalanche at 75 V. Use Value: 0.20 A non-repetitive peak current rating handles 100 μs surges without degradation, extending system-level surge immunity beyond basic TVS requirements. |
| Temperature-Compensated Bias | Low-Power Sensor Excitation |
|
Use Scenario: Generating temperature-stable bias current for RTD or thermistor measurement bridges. IC Role / Device Role / Timing Role: Zener diode paired with NTC thermistor to offset +52.5 mV/K drift via complementary negative coefficient. Use Value: Predictable positive temperature coefficient allows precise passive compensation - achieving <±0.1 %/°C net drift in bridge excitation voltage. |
Use Scenario: Supplying constant 75 V excitation to high-resistance piezoresistive pressure sensors in battery-powered IoT nodes. IC Role / Device Role / Timing Role: Low-leakage (≤0.05 μA) Zener maintaining fixed voltage across sensor while drawing negligible quiescent current. Use Value: Enables >10-year battery life in always-on sensing applications by minimizing standby power consumption in the excitation path. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage regulator diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5265BLT1G | 75 V nominal, ±5 % tolerance, 225 Ω max rdif at 20 mA, SOT-23 package (larger footprint, higher thermal resistance). | Higher power dissipation (350 mW) but looser tolerance; better suited for higher-current clamping, not precision reference. | Select when cost sensitivity outweighs voltage accuracy and board space is not constrained. |
| Vishay BZX384-C75 | 75 V nominal, ±5 % tolerance, 500 Ω max rdif at 2 mA, identical SOD323 package and pinout. | Same physical fit but wider regulation band (71.25–78.75 V); acceptable where absolute voltage accuracy is secondary to cost. | Choose for non-critical biasing where ±5 % tolerance satisfies system margin requirements and BOM consolidation is prioritized. |
Compared with MMBZ5265BLT1G and BZX384-C75, the BZX384-B75/ZLX delivers tighter voltage control and lower thermal resistance in the same compact SOD323 footprint - making it optimal for space-limited, accuracy-sensitive designs where ±2 % regulation stability is mandatory.
Availability
BZX384-B75/ZLX is available at Aetrix Electronics and suitable for industrial power monitoring, IoT sensor biasing, and embedded controller protection requiring stable component supply, consistent parametric performance, and long-term manufacturability.
Supply support for BZX384-B75/ZLX 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 semiconductor manufacturer specializing in high-volume logic, discrete, and MOSFET solutions, with global R&D and manufacturing infrastructure focused on reliability and efficiency.
The BZX384 series is part of Nexperia's precision Zener diode portfolio designed specifically for low-power voltage reference, overvoltage protection, and bias network stabilization in consumer, industrial, and computing applications.
FAQ
What is the Zener voltage tolerance of BZX384-B75/ZLX?
The BZX384-B75/ZLX has a ±2 % Zener voltage tolerance, meaning its breakdown voltage at IZ = 2 mA falls within 73.5 V to 76.5 V. This tighter tolerance than the ±5 % BZX384-C75 variant supports higher-accuracy voltage referencing in feedback and bias circuits - confirmed in Table 9 of the Nexperia datasheet Rev. 4.
What is the maximum reverse current the BZX384-B75/ZLX can handle during a transient?
The BZX384-B75/ZLX supports a non-repetitive peak reverse current (IZSM) of 0.20 A for pulses up to 100 μs, as specified in Table 5 and Table 9 of the datasheet. This rating enables reliable transient suppression without permanent damage when used in overvoltage clamp configurations.
Can BZX384-B75/ZLX be used in high-temperature environments?
Yes, the BZX384-B75/ZLX is rated for junction temperatures up to 150 °C and ambient temperatures from –65 °C to +150 °C (Table 5). Its thermal resistance of 415 K/W (Rth(j-a)) and stable Zener characteristics across temperature make it suitable for enclosed power supplies and industrial control modules.
What is the forward voltage of BZX384-B75/ZLX at 10 mA?
The forward voltage (VF) of BZX384-B75/ZLX is ≤0.9 V at IF = 10 mA (Table 1 and Table 7), verified under pulse test conditions (tp ≤ 100 μs). This low VF ensures minimal conduction loss if the device is used in forward-biased roles such as LED indicators or polarity protection.
How does the temperature coefficient of BZX384-B75/ZLX affect its regulation stability?
The BZX384-B75/ZLX has a temperature coefficient (SZ) of +52.5 mV/K at IZ = 2 mA (Table 9), indicating its Zener voltage increases predictably with temperature. This known drift enables passive compensation in bias networks - for example, pairing with an NTC thermistor to achieve near-zero net temperature drift in precision references.
BZX384-B75/ZLX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 75 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 255 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 700 mV
- 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-323
BZX384-B75/ZLX FAQ
1.How can I place an order for BZX384-B75/ZLX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-B75/ZLX 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-B75/ZLX reliable?
The price and inventory of BZX384-B75/ZLX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-B75/ZLX is usually 5 days.
3.What payment methods are accepted for BZX384-B75/ZLX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-B75/ZLX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-B75/ZLX?
BZX384-B75/ZLX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-B75/ZLX 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-B75/ZLX?
For technical support, including BZX384-B75/ZLX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-B75/ZLX requirements.
6.How does Aetrix verify that BZX384-B75/ZLX is sourced from the original manufacturer or authorized distributors?
All BZX384-B75/ZLX 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-B75/ZLX meets industry standards.
7.What is the process for return or replacement of BZX384-B75/ZLX?
All BZX384-B75/ZLX units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-B75/ZLX, 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-B75/ZLX part is unused and in its original packaging.
Return procedure for BZX384-B75/ZLX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-B75/ZLX 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…
