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Nexperia USA Inc. BZX384-B75,115
- Part No.:
- BZX384-B75,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-B75,115.pdf
- Description:
- DIODE ZENER 75V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:13,524
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Product details
Overview
BZX384-B75,115 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 test current, 300 mW total power dissipation, and 0.2 A maximum forward current. It serves as a precision shunt reference in low-power analog supply rails, overvoltage clamping circuits, and voltage-level translation interfaces.
For engineers reviewing the BZX384-B75,115 datasheet, BZX384-B75,115 pinout, BZX384-B75,115 application, or BZX384-B75,115 equivalent, key selection criteria include its 75 V Zener voltage with ±2 % tolerance, 500 Ω typical differential resistance at 2 mA, 255 μA reverse leakage at 56 V, and thermal resistance of 415 K/W in free air - all critical for stable regulation under varying load and ambient conditions.
Technical Context
This discrete Zener diode operates in reverse-biased breakdown mode to maintain a stable reference voltage across its terminals. Its 75 V nominal Zener voltage is specified at IZ = 2 mA, with temperature coefficient of +0.05 mV/K and differential resistance of 500 Ω (max) ensuring predictable regulation drift and dynamic impedance behavior.
The device uses planar epitaxial silicon construction in a surface-mount SOD323 package with cathode-marked anode-cathode polarity. It supports non-repetitive peak reverse power dissipation up to 40 W for 100 μs pulses and junction temperatures up to 150 °C, enabling robust transient suppression in compact PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 75 V nominal at IZ = 2 mA; ±2 % tolerance ensures tight regulation band for precision references. |
| Differential Resistance (rdif) | 500 Ω max at IZ = 2 mA; defines output impedance affecting load regulation error. |
| Reverse Current (IR) | 255 μA max at VR = 56 V; quantifies leakage-induced error in high-impedance bias networks. |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C on FR4 PCB; sets continuous DC power limit for thermal design. |
| Non-repetitive Peak Power (PZSM) | 40 W for tp = 100 μs; enables surge protection without device failure during transient events. |
| Thermal Resistance (Rth(j-a)) | 415 K/W in free air; determines junction-to-ambient temperature rise per watt of dissipated power. |
| Forward Voltage (VF) | 0.9 V max at IF = 10 mA; defines conduction loss when used in forward-biased clamp or protection paths. |
Pinout & Package
The BZX384-B75,115 is housed in a SOD323 (SC-76) plastic surface-mount package measuring 1.8 mm × 1.35 mm × 0.95 mm, with cathode identified by a marking bar on the body.
| 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 current path during regulation. |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener voltage tolerance | Enables tighter output voltage control than ±5 % variants, reducing need for post-regulation trimming. |
| 75 V nominal breakdown voltage | Supports high-side sensing and industrial bus voltage monitoring (e.g., 48 V systems with margin). |
| 300 mW power rating | Allows direct use in low-current bias networks without external heat sinking on standard FR4 PCBs. |
| SOD323 footprint compatibility | Enables automated placement and reflow soldering in space-constrained designs with 0.6 mm pad pitch. |
| 150 °C maximum junction temperature | Permits operation in extended-temperature environments such as industrial control enclosures. |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Providing stable 75 V reference for feedback divider in isolated DC-DC converter secondary side. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise output voltage setpoint via optocoupler feedback loop. Use Value: ±2 % tolerance ensures output regulation within ±1.5 V over line/load/temperature, meeting EN 61000-3-2 compliance margins. |
Use Scenario: Protecting microcontroller GPIO input against accidental 80 V transients on industrial sensor interface lines. IC Role / Device Role / Timing Role: Passive clamping element diverting excess energy to ground before IC damage threshold is exceeded. Use Value: 40 W non-repetitive peak power rating absorbs 100 μs surges without degradation, preserving signal integrity. |
| Voltage Level Translation | Current Source Biasing |
Use Scenario: Converting 100 V rail to 75 V logic-compatible level for analog front-end comparators in battery management systems. IC Role / Device Role / Timing Role: Zener-based passive level shifter setting upper rail for comparator hysteresis window. Use Value: 500 Ω differential resistance minimizes loading error on high-impedance comparator inputs, maintaining threshold accuracy. |
Use Scenario: Establishing constant 2 mA bias current for photodiode amplifier in optical smoke detector circuit. IC Role / Device Role / Timing Role: Precision current source formed with series resistor, leveraging stable VZ to fix IZ. Use Value: Temperature coefficient of +0.05 mV/K limits current drift to <0.1 % over –40 °C to +85 °C ambient range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5265B | 75 V nominal, ±5 % tolerance, 350 mW Ptot, SOT-23 package | Higher power but looser tolerance; larger footprint requires layout revision | Select when higher surge margin is needed and ±5 % regulation error is acceptable. |
| Vishay BZX384-C75 | 75 V nominal, ±5 % tolerance, same SOD323 package and 300 mW rating | Lower cost but wider voltage spread increases risk of out-of-spec output in tight-margin designs | Select for cost-sensitive applications where 71.25–78.75 V range meets system requirements. |
Compared with BZX384-B75,115, MMBZ5265B offers higher power headroom but sacrifices tolerance and package compatibility, while BZX384-C75 retains identical form factor and power rating but trades ±2 % precision for lower unit cost - making the BZX384-B75,115 optimal for designs requiring both compact size and tight voltage control.
Availability
BZX384-B75,115 is available at Aetrix Electronics and suitable for industrial sensor interfaces, programmable logic controller (PLC) input protection, and medical device power supervision requiring stable component supply and traceable sourcing.
Supply support for BZX384-B75,115 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 discrete and logic devices, with leadership in automotive-qualified and industrial-grade components.
The BZX384 series belongs to Nexperia's precision Zener diode product line, engineered for stable voltage reference and clamping in space-constrained, low-power applications across industrial, consumer, and computing markets.
FAQ
What is the Zener test current for BZX384-B75,115?
The BZX384-B75,115 is characterized at a Zener test current of 2 mA, as specified in Table 9 of the datasheet. This current establishes the 75 V nominal breakdown voltage and is used to measure differential resistance (500 Ω max) and temperature coefficient (+0.05 mV/K). Operating significantly above or below this current alters the effective Zener voltage due to dynamic impedance effects.
Can BZX384-B75,115 be used in parallel for higher power handling?
No - BZX384-B75,115 must not be paralleled due to mismatched Zener voltage tolerances and thermal runaway risk. Even with ±2 % tolerance, unit-to-unit VZ variation causes current hogging in one device, leading to localized overheating and failure. For higher power, select a single higher-rated Zener or implement active current balancing.
What is the maximum reverse voltage before breakdown begins?
The maximum reverse voltage before onset of significant Zener conduction is 56 V, defined as the voltage at which reverse current reaches 255 μA. Below this, leakage remains negligible (<1 μA), allowing safe use as a blocking diode in bidirectional signal paths or high-impedance sensing nodes without unintended conduction.
How does ambient temperature affect the Zener voltage stability?
Ambient temperature impacts BZX384-B75,115 through its +0.05 mV/K temperature coefficient, causing a +3.75 mV shift per 75 °C rise from 25 °C. At 100 °C ambient, VZ increases by ~3.75 V, remaining within ±2 % tolerance band only if initial VZ is at the lower end of specification (73.5 V). Derating is required for full-temperature-range accuracy.
BZX384-B75,115 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):
- 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-B75,115 FAQ
1.How can I place an order for BZX384-B75,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-B75,115 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-B75,115 reliable?
The price and inventory of BZX384-B75,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-B75,115 is usually 5 days.
3.What payment methods are accepted for BZX384-B75,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-B75,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-B75,115?
BZX384-B75,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-B75,115 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-B75,115?
For technical support, including BZX384-B75,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-B75,115 requirements.
6.How does Aetrix verify that BZX384-B75,115 is sourced from the original manufacturer or authorized distributors?
All BZX384-B75,115 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-B75,115 meets industry standards.
7.What is the process for return or replacement of BZX384-B75,115?
All BZX384-B75,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-B75,115, 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-B75,115 part is unused and in its original packaging.
Return procedure for BZX384-B75,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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