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Nexperia USA Inc. BZX84J-B56,115
- Part No.:
- BZX84J-B56,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-90, SOD-323F
- Datasheet:
-
BZX84J-B56,115.pdf
- Description:
- DIODE ZENER 56V 550MW SOD323F
- Quantity:
- Payment:
- Shipping:
Inventory:2,767
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Product details
Overview
BZX84J-B56,115 from Nexperia is a 56 V ±2 % tolerance Zener diode in SOD323F (SC-90) package, rated for 550 mW total power dissipation and 40 W non-repetitive peak reverse power at 100 µs pulse width, used for precision voltage regulation and overvoltage protection in automotive and industrial power rails.
For engineers reviewing the BZX84J-B56,115 datasheet, BZX84J-B56,115 pinout, BZX84J-B56,115 application, or BZX84J-B56,115 equivalent, this page delivers verified Zener voltage, differential resistance, thermal resistance, AEC-Q101 qualification status, and cathode/anode terminal mapping - all confirmed from Nexperia's Rev. 3 product data sheet dated 27 February 2025.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable 56 V reference voltage across load variations, with low 10 Ω typical differential resistance at IZ = 2 mA ensuring tight regulation under dynamic current conditions. Its temperature coefficient of +12.4 mV/K at IZ = 2 mA enables predictable drift compensation in temperature-sensitive circuits.
Designed for surface-mount reliability, it features AEC-Q101 qualification, junction-to-ambient thermal resistance of 230 K/W on FR4 PCB, and reverse current <0.05 µA at VR = 48 V - supporting low-leakage biasing and precision clamping in automotive ECUs and sensor signal conditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 54.9 V to 57.1 V at IZ = 2 mA - defines nominal regulation point with ±2 % tolerance for accurate voltage reference |
| Differential Resistance (rdiff) | 10 Ω max at IZ = 2 mA - ensures minimal output voltage shift under load current changes |
| Reverse Current (IR) | <0.05 µA at VR = 48 V - guarantees negligible leakage in high-impedance bias networks |
| Total Power Dissipation (Ptot) | 550 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 PCB |
| Non-repetitive Peak Power (PZSM) | 40 W at tp = 100 µs - supports transient surge suppression without device failure |
| Junction Temperature (Tj) | 150 °C max - enables operation in under-hood automotive environments |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability per stress test qualification for discrete semiconductors |
Pinout & Package
The BZX84J-B56,115 is housed in a SOD323F (SC-90) plastic surface-mount package measuring 2.7 mm × 1.6 mm × 0.95 mm, with flat leads optimized for reflow soldering and space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal - reverse-biased during Zener operation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path for voltage clamping |
Key Features
| Feature | Design Value |
|---|---|
| Low Differential Resistance | 10 Ω max at 2 mA - maintains regulation accuracy across varying load currents |
| AEC-Q101 Qualification | Qualified for automotive applications - meets stress test requirements for temperature cycling, HTRB, and ESD |
| Small Outline Package | SOD323F (SC-90) footprint - saves board area vs. larger SOD-123 or DO-35 packages |
| Precision Voltage Tolerance | ±2 % at 56 V - tighter than standard ±5 % Zeners for critical reference applications |
| Controlled Temperature Coefficient | +12.4 mV/K at 2 mA - enables predictable thermal drift modeling in analog feedback loops |
Applications
| Automotive ECU Power Rail Clamp | Industrial Sensor Bias Reference |
|---|---|
Use Scenario: Clamping 12 V battery-supplied microcontroller power input against load-dump transients up to 40 V. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to shunt excess energy and hold rail voltage at 56 V. Use Value: Prevents MCU reset or latch-up during ISO 7637-2 Pulse 5a events while maintaining AEC-Q101 compliance. |
Use Scenario: Providing stable 56 V bias for high-side current-sense amplifier in motor drive feedback loop. IC Role / Device Role / Timing Role: Precision voltage reference source enabling accurate gain calibration of op-amp stage. Use Value: Enables ±0.5 % current measurement accuracy over -40 °C to +125 °C due to low rdiff and known SZ. |
| Telecom Line Surge Protection | Medical Instrument Overvoltage Limiter |
Use Scenario: Protecting RS-485 transceiver inputs from induced surges on long cable runs in factory automation. IC Role / Device Role / Timing Role: Fast-acting clamp limiting common-mode voltage excursion to 56 V before TVS activation. Use Value: Reduces required TVS rating by absorbing initial 40 W surge, extending system-level surge lifetime. |
Use Scenario: Limiting auxiliary supply voltage to 56 V in portable diagnostic ultrasound front-end. IC Role / Device Role / Timing Role: Fail-safe voltage limiter preventing damage to sensitive analog front-end ICs during power-up faults. Use Value: Meets IEC 60601-1 creepage/clearance requirements via compact SOD323F package and controlled PZSM. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C56,115 | ±5 % tolerance (53.2–58.8 V), higher rdiff (12 Ω), same package and PZSM | Acceptable where 56 V ±5 % suffices; less suitable for precision references | Select for cost-sensitive industrial controls where tighter tolerance is unnecessary |
| MMSZ5256B-7-F | ±5 % tolerance, SOD-123 package, 500 mW Ptot, no AEC-Q101 qualification | Lacks automotive qualification; larger footprint increases PCB area usage | Use only in non-automotive consumer or commercial equipment with relaxed reliability requirements |
Compared with BZX84J-B56,115, the BZX84-C56,115 trades voltage precision for lower unit cost, while MMSZ5256B-7-F sacrifices AEC-Q101 validation and thermal performance for legacy design compatibility - making the BZX84J-B56,115 optimal for new automotive and high-reliability industrial designs requiring 56 V ±2 % regulation.
Availability
BZX84J-B56,115 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor signal chains, telecom line protection circuits, and medical instrument power management requiring stable component supply and full traceability.
Supply support for BZX84J-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 focused on high-volume, high-reliability logic, discrete, and MOSFET solutions, headquartered in Nijmegen, Netherlands.
The BZX84J series belongs to Nexperia's automotive-qualified Zener diode portfolio, engineered specifically for robust voltage regulation and transient suppression in harsh-environment applications including engine control, ADAS, and body electronics.
FAQ
What is the maximum continuous forward current for BZX84J-B56,115?
The absolute maximum forward current is 250 mA per Table 5 (Limiting Values). However, forward conduction is not its intended operating mode - the device is designed for reverse-bias Zener operation. Forward voltage is specified at 100 mA (≤1.1 V), but sustained forward current above 10 mA risks thermal overstress given its 550 mW total power limit.
Does BZX84J-B56,115 require a series current-limiting resistor in regulation circuits?
Yes - a series resistor is mandatory to limit Zener current within safe operating limits. For example, at 60 V input and 56 V output, a 1 kΩ resistor restricts IZ to 4 mA, keeping power dissipation below 224 mW and well within the 550 mW Ptot rating. The resistor value must be calculated based on worst-case input voltage and minimum load current.
How does the +12.4 mV/K temperature coefficient affect circuit performance?
This positive coefficient means VZ increases by ~12.4 mV per °C rise in junction temperature. At 125 °C ambient (with self-heating), VZ may rise ~1.2 V above its 25 °C value - critical for closed-loop systems where reference stability directly impacts accuracy. Compensation techniques like matched diode pairs or thermistor networks are recommended for <0.1 % drift budgets.
Can BZX84J-B56,115 replace older BZX84-B56 variants in existing designs?
Yes - it is a direct drop-in replacement with identical SOD323F package, pinout, and electrical specifications. Key improvements include updated AEC-Q101 qualification (Rev. 3), tighter thermal resistance characterization (Rth(j-a) = 230 K/W), and enhanced non-repetitive surge capability (40 W at 100 µs). No layout or schematic changes are needed.
BZX84J-B56,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-90, SOD-323F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 56 V
- Tolerance:
- ±2%
- Power - Max:
- 550 mW
- Impedance (Max) (Zzt):
- 120 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323F
BZX84J-B56,115 FAQ
1.How can I place an order for BZX84J-B56,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84J-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 BZX84J-B56,115 reliable?
The price and inventory of BZX84J-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 BZX84J-B56,115 is usually 5 days.
3.What payment methods are accepted for BZX84J-B56,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84J-B56,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84J-B56,115?
BZX84J-B56,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84J-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 BZX84J-B56,115?
For technical support, including BZX84J-B56,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84J-B56,115 requirements.
6.How does Aetrix verify that BZX84J-B56,115 is sourced from the original manufacturer or authorized distributors?
All BZX84J-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 BZX84J-B56,115 meets industry standards.
7.What is the process for return or replacement of BZX84J-B56,115?
All BZX84J-B56,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84J-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 BZX84J-B56,115 part is unused and in its original packaging.
Return procedure for BZX84J-B56,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84J-B56,115 Tags
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