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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

Nexperia USA Inc. BZX384-B75F

Name: BZX384-B75F
Brand: Nexperia USA Inc.
SKU: BZX384-B75F
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX384-B75F

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

Package:: SC-76, SOD-323

Datasheet:: BZX384-B75F.pdf

Description:: DIODE ZENER 75V 300MW SOD323

Quantity:: RFQ Add To RFQ list

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Inventory:9,990

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Product details

Overview

BZX384-B75F from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 75 V nominal breakdown voltage at 2 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 supply rails and sensor interface circuits.

For engineers reviewing the BZX384-B75F datasheet, BZX384-B75F pinout, BZX384-B75F application, or BZX384-B75F equivalent, key selection criteria include its 75 V Zener voltage with ±2 % tolerance, 2 mA test current, 500 Ω maximum differential resistance, 0.05 mV/K temperature coefficient, and SOD323 thermal performance (R_th(j-a) = 415 K/W).

Technical Context

This device operates in reverse-bias breakdown mode to maintain stable DC voltage across its terminals under varying load or input conditions. Its 75 V nominal Zener voltage is specified at I_Z = 2 mA, with a maximum differential resistance of 500 Ω ensuring minimal voltage shift under current variation.

The diode exhibits a low temperature coefficient of ±0.05 mV/K at I_Z = 2 mA, enabling stable regulation over ambient temperatures from –65 °C to +150 °C. Its non-repetitive peak reverse power rating of 40 W (t_p = 100 μs) supports transient surge suppression in protected interfaces.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	75 V nominal at I_Z = 2 mA; ±2 % tolerance ensures tight regulation window of 73.5–76.5 V.
Total Power Dissipation (P_tot)	300 mW at T_amb ≤ 25 °C on FR4 PCB; defines continuous DC power handling in standard layout.
Differential Resistance (r_dif)	≤500 Ω max at I_Z = 2 mA; limits output voltage drift under load current changes.
Reverse Current (I_R)	≤0.2 μA max at V_R = 57 V; guarantees low leakage before breakdown onset.
Non-repetitive Peak Power (P_ZSM)	40 W for t_p = 100 μs; enables single-event ESD/surge clamping without failure.
Thermal Resistance (R_th(j-a))	415 K/W in free air on FR4 PCB; determines junction temperature rise under steady-state power.
Forward Voltage (V_F)	≤0.9 V at I_F = 10 mA; defines conduction loss when used in forward-biased protection paths.

Pinout & Package

The BZX384-B75F is housed in a surface-mount SOD323 (SC-76) plastic package with two leads: 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; reverse-bias terminal where Zener breakdown occurs.
2	Anode (A)	Connected to ground or lower-potential rail; completes bias path for regulation current flow.

Key Features

Feature	Design Value
±2 % Zener voltage tolerance	Enables tighter output voltage control than ±5 % variants, reducing need for post-regulation trimming.
Low differential resistance (≤500 Ω)	Minimizes output voltage variation across 0.5–5 mA operating current range in reference applications.
Low temperature coefficient (±0.05 mV/K)	Ensures <±15 mV drift over –40 °C to +85 °C ambient, critical for precision analog sensing.
SOD323 footprint compatibility	Supports high-density PCB layouts with standardized 1.35 mm × 0.85 mm land pattern per JEDEC MS-012.
40 W surge capability	Provides robustness against IEC 61000-4-2 Level 4 ESD events without external TVS supplementation.

Applications

Industrial Sensor Reference

USB Port Overvoltage Clamp

Use Scenario: Stabilizing excitation voltage for resistive bridge sensors in PLC analog input modules.

IC Role / Device Role / Timing Role: Zener reference diode providing fixed 75 V bias to high-voltage sensor front-end.

Use Value: ±2 % tolerance and low r_dif ensure <±0.5 % full-scale error contribution to 16-bit ADC measurements.

Use Scenario: Clamping induced transients on USB VBUS line during hot-plug or ESD events.

IC Role / Device Role / Timing Role: Reverse-biased shunt protector diverting surge current above 75 V threshold.

Use Value: 40 W non-repetitive peak power rating absorbs 15 kV contact ESD pulses without degradation.

Programmable Logic Supply Monitor

Isolated DC-DC Feedback Divider

Use Scenario: Detecting undervoltage/overvoltage faults in FPGA core supply rails using comparator input.

IC Role / Device Role / Timing Role: Precision voltage reference feeding comparator hysteresis network.

Use Value: Low 0.05 mV/K TC maintains trip-point accuracy across industrial temperature range.

Use Scenario: Setting regulated output voltage in flyback converter via optocoupler feedback loop.

IC Role / Device Role / Timing Role: Upper leg of resistive divider referenced to secondary-side ground.

Use Value: 300 mW P_tot allows direct connection to 75 V auxiliary winding without series resistor.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener regulation applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX384-C75	±5 % tolerance (70–80 V range); higher max IR (0.5 μA at 57 V); same package and P_tot.	Acceptable where system-level calibration compensates for wider voltage spread.	Select for cost-sensitive designs where ±5 % regulation window meets functional safety margin.
MMSZ5265B	75 V nominal at 20 mA; ±5 % tolerance; SOD-123 package; 500 mW P_tot; higher r_dif (700 Ω).	Requires larger PCB area and delivers less stable regulation at low currents (<5 mA).	Choose only if legacy SOD-123 footprint reuse is mandatory and higher power dissipation is acceptable.

Compared with BZX384-C75, the BZX384-B75F offers tighter voltage control and lower leakage for precision references; compared with MMSZ5265B, it provides superior thermal efficiency in dense layouts and better low-current regulation stability.

Availability

BZX384-B75F is available at Aetrix Electronics and suitable for industrial sensor references, USB port protection, programmable logic supply monitoring, and isolated DC-DC feedback divider applications requiring stable component supply and long-term obsolescence management.

Supply support for BZX384-B75F 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, with leadership in automotive-qualified and industrial-grade components.

The BZX384 series belongs to Nexperia's precision Zener regulator portfolio, designed specifically for space-constrained, low-power voltage reference and clamping functions in industrial, computing, and consumer electronics.

FAQ

What is the recommended test current for measuring the Zener voltage of BZX384-B75F?

The nominal 75 V Zener voltage is specified at I_Z = 2 mA per datasheet Table 9. Using this current ensures measurement alignment with published parameters including differential resistance and temperature coefficient. Deviating significantly-especially below 0.5 mA or above 5 mA-introduces measurable deviation due to r_dif and TC effects.

Can BZX384-B75F be used in parallel for higher power dissipation?

No-Zener diodes exhibit negative temperature coefficients and manufacturing variations that cause current hogging when paralleled. Even matched units will not share current evenly, risking thermal runaway in one device. For >300 mW requirements, use a single higher-rated Zener or active regulation instead.

How does the SOD323 package affect thermal performance in continuous operation?

Mounted on standard FR4 PCB, the SOD323 package delivers R_th(j-a) = 415 K/W. At 300 mW dissipation, this yields ~125 K junction-to-ambient rise-requiring ambient ≤ 25 °C for T_j ≤ 150 °C. Derating to 200 mW above 50 °C ambient is advised for reliability.

Is BZX384-B75F suitable for automotive applications?

No-this variant is non-automotive qualified per Nexperia's revision history (Rev. 4, Jan 2023). Automotive-grade alternatives (e.g., BZX384-Q series) undergo AEC-Q101 stress testing and have extended temperature qualification. Use only BZX384-B75F in industrial, computing, or consumer systems.

BZX384-B75F 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):: 75 V

Tolerance:: ±2%

Power - Max:: 300 mW

Impedance (Max) (Zzt):: 255 Ohms

Current - Reverse Leakage @ Vr:: 50 nA @ 52.5 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-B75F FAQ

1.How can I place an order for BZX384-B75F through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX384-B75F 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-B75F reliable?

The price and inventory of BZX384-B75F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-B75F is usually 5 days.

3.What payment methods are accepted for BZX384-B75F?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-B75F transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX384-B75F?

BZX384-B75F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX384-B75F 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-B75F?

For technical support, including BZX384-B75F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-B75F requirements.

6.How does Aetrix verify that BZX384-B75F is sourced from the original manufacturer or authorized distributors?

All BZX384-B75F 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-B75F meets industry standards.

7.What is the process for return or replacement of BZX384-B75F?

All BZX384-B75F units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-B75F, 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-B75F part is unused and in its original packaging.

Return procedure for BZX384-B75F:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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