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Nexperia USA Inc. BZX384-B56,115
- Part No.:
- BZX384-B56,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-B56,115.pdf
- Description:
- DIODE ZENER 56V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:9,333
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Product details
Overview
BZX384-B56,115 from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 56 V nominal breakdown voltage at 2 mA, 300 mW total power dissipation, and 150 °C maximum junction temperature. It provides stable reference voltage in low-power linear regulators and overvoltage protection circuits for industrial sensor interfaces.
For engineers reviewing the BZX384-B56,115 datasheet, BZX384-B56,115 pinout, BZX384-B56,115 application, or BZX384-B56,115 equivalent, key selection criteria include its 56 V Zener voltage tolerance, differential resistance of 425 Ω at 2 mA, reverse current ≤0.5 μA at 44.8 V, thermal resistance of 110 K/W to solder point, and non-repetitive peak reverse current rating of 0.3 A.
Technical Context
This Zener diode operates in reverse-biased avalanche breakdown mode with a specified 56 V nominal working voltage at IZ = 2 mA. Its temperature coefficient is +0.05 mV/K, indicating minimal drift over temperature, and it exhibits 425 Ω typical differential resistance, ensuring stable regulation under small-signal load variations.
The device is characterized for operation up to 150 °C junction temperature and features a non-repetitive peak reverse power dissipation of 40 W for 100 μs pulses. Its SOD323 package delivers low thermal resistance (110 K/W to solder point), enabling reliable performance in compact PCB layouts with limited copper area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 56 V nominal at IZ = 2 mA; ±2 % tolerance ensures precise voltage clamping in reference circuits |
| Differential Resistance (rdif) | 425 Ω max at IZ = 2 mA; determines output impedance and regulation sensitivity to current changes |
| Reverse Current (IR) | ≤0.5 μA at VR = 44.8 V; guarantees low leakage in high-impedance bias networks |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C on FR4 PCB; defines continuous DC power handling in standard mounting |
| Junction Temperature (Tj) | −65 °C to +150 °C operating range; supports deployment in extended-temperature industrial environments |
| Non-repetitive Peak Reverse Current (IZSM) | 0.3 A for tp = 100 μs; enables transient overvoltage suppression without damage |
Pinout & Package
The BZX384-B56,115 is housed in a surface-mount SOD323 (SC-76) plastic package with two leads: cathode (K) and anode (A). 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 correct orientation for reverse-bias operation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes current path during Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener voltage tolerance | Enables tighter regulation accuracy than ±5 % variants, reducing need for post-regulation trimming in precision references |
| 300 mW power rating | Supports continuous operation in low-current biasing and feedback networks without heatsinking |
| SOD323 footprint compatibility | Matches industry-standard SC-76 land pattern (0.5 mm pad pitch), simplifying PCB layout and reflow assembly |
| 150 °C maximum junction temperature | Permits use in thermally constrained enclosures such as sealed industrial controllers and automotive under-hood modules |
Applications
| Industrial Sensor Signal Conditioning | Low-Power Microcontroller Reference |
|---|---|
Use Scenario: Stabilizing excitation voltage for resistive bridge sensors in PLC analog input modules. IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage reference in a passive divider network feeding op-amp instrumentation amplifiers. Use Value: 56 V rating allows direct use with 48 V industrial bus supplies; ±2 % tolerance ensures <0.5 % gain error propagation into ADC front-end. | Use Scenario: Providing stable reset threshold for 3.3 V microcontrollers powered from unregulated 5 V DC-DC outputs. IC Role / Device Role / Timing Role: Clamping diode in RC-based reset circuit, defining precise voltage trip point for POR logic. Use Value: Low 0.5 μA leakage at 44.8 V prevents capacitor discharge delay; 425 Ω rdif ensures sharp transition during brown-out detection. |
| Overvoltage Protection Clamp | LED Driver Current Regulation |
Use Scenario: Protecting CAN transceiver inputs against 60 V surge events in factory automation fieldbus nodes. IC Role / Device Role / Timing Role: Shunt limiter placed across receiver pins, conducting only above 56 V to divert surge energy. Use Value: 0.3 A non-repetitive peak current rating absorbs IEC 61000-4-5 Level 3 surges; 40 W pulse power withstand avoids failure during transient events. | Use Scenario: Setting constant current for indicator LEDs in HVAC control panels using simple resistor-Zener bias. IC Role / Device Role / Timing Role: Voltage reference in series with current-setting resistor to establish LED forward current. Use Value: Stable 56 V reference enables predictable 1–2 mA LED drive across −40 °C to +85 °C ambient; 110 K/W Rth(j-sp) minimizes self-heating error. |
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 MMBZ5259B | Same 56 V nominal, ±5 % tolerance, SOD-123 package, 200 mW Ptot | Lower power rating limits continuous current to ~3.6 mA vs. 5.4 mA for BZX384-B56 | Select when cost sensitivity outweighs precision and thermal performance requirements |
| Vishay BZT52-B56 | Same 56 V, ±2 %, SOD-123, 500 mW Ptot, but higher rdif (600 Ω) | Higher dynamic impedance degrades regulation stability under varying load conditions | Select when higher continuous power is required and board space permits larger SOD-123 footprint |
Compared with MMBZ5259B, BZX384-B56,115 offers tighter tolerance and higher power in smaller SOD323; versus BZT52-B56, it trades 200 mW lower Ptot for 30 % lower differential resistance and 30 % smaller footprint-critical for dense IoT sensor nodes.
Availability
BZX384-B56,115 is available at Aetrix Electronics and suitable for industrial sensor interfaces, microcontroller reset circuits, overvoltage protection clamps, and LED current regulation requiring stable component supply and long-term obsolescence management.
Supply support for BZX384-B56,115 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 delivering high-performance, reliable discrete, logic, and MOSFET devices with focus on efficiency and miniaturization.
The BZX384 series belongs to Nexperia's precision Zener regulator portfolio, engineered for low-power voltage reference and protection in space-constrained industrial and consumer electronics.
FAQ
What is the maximum continuous reverse current the BZX384-B56,115 can sustain at 25 °C ambient?
The device is rated for 300 mW total power dissipation at Tamb ≤ 25 °C on standard FR4 PCB. At 56 V Zener voltage, this corresponds to a maximum continuous reverse current of approximately 5.4 mA (300 mW ÷ 56 V). Exceeding this value risks thermal runaway due to junction temperature rise beyond 150 °C.
How does the 56 V Zener voltage tolerance affect accuracy in a precision reference design?
With ±2 % tolerance, the actual breakdown voltage ranges from 54.88 V to 57.12 V at IZ = 2 mA. In a resistor-divider reference configuration, this introduces a direct proportional error in the derived lower-voltage output. For example, a 56 V → 5 V scaled reference will exhibit ±2 % absolute error unless trimmed or compensated via calibration.
Can the BZX384-B56,115 be used in place of a 51 V Zener for overvoltage clamping?
No-substituting a 56 V Zener for a 51 V design violates the intended clamping threshold and may allow damaging voltages to reach downstream circuitry. The 5 V difference exceeds typical system margin allowances. Replacement requires verification of all downstream component voltage ratings and recalculation of power dissipation under fault conditions.
What is the significance of the 110 K/W thermal resistance to solder point (Rth(j-sp))?
Rth(j-sp) = 110 K/W quantifies how effectively heat transfers from the silicon junction to the PCB copper via the cathode solder joint. A lower value means less temperature rise per watt dissipated-enabling higher safe operating power in compact layouts. This parameter is critical for predicting real-world junction temperature when mounted on minimal copper areas.
BZX384-B56,115 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):
- 56 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 200 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 39.2 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-B56,115 FAQ
1.How can I place an order for BZX384-B56,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-B56,115 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-B56,115 reliable?
The price and inventory of BZX384-B56,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-B56,115 is usually 5 days.
3.What payment methods are accepted for BZX384-B56,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-B56,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-B56,115?
BZX384-B56,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-B56,115 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-B56,115?
For technical support, including BZX384-B56,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-B56,115 requirements.
6.How does Aetrix verify that BZX384-B56,115 is sourced from the original manufacturer or authorized distributors?
All BZX384-B56,115 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-B56,115 meets industry standards.
7.What is the process for return or replacement of BZX384-B56,115?
All BZX384-B56,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-B56,115, 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-B56,115 part is unused and in its original packaging.
Return procedure for BZX384-B56,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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