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Nexperia USA Inc. BZX84-B56,215
- Part No.:
- BZX84-B56,215
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84-B56,215.pdf
- Description:
- DIODE ZENER 56V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,786
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Product details
Overview
BZX84-B56,215 from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOT23 (TO-236AB) package, rated for 56 V nominal breakdown voltage at 2 mA test current, 250 mW total power dissipation, and 150 °C maximum junction temperature - used for precision low-power voltage reference and overvoltage protection in power supply feedback paths.
For engineers reviewing the BZX84-B56,215 datasheet, BZX84-B56,215 pinout, BZX84-B56,215 application, or BZX84-B56,215 equivalent, key selection criteria include Zener voltage tolerance (±2 %), differential resistance (425 Ω max), reverse leakage (200 μA max at VR = 44.8 V), thermal resistance (500 K/W junction-to-ambient), and non-repetitive surge capability (0.3 A peak reverse current).
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining stable output voltage across a load by conducting reverse current when applied voltage exceeds its 56 V Zener threshold. Its operation relies on controlled avalanche breakdown in silicon, with temperature coefficient of +0.05 mV/K at IZ = 2 mA.
The diode exhibits 425 Ω maximum differential resistance at IZ = 2 mA, ensuring predictable regulation slope under varying load conditions, and supports non-repetitive peak reverse currents up to 0.3 A for transient suppression in low-energy circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 56 V nominal at IZ = 2 mA; defines regulated reference point in shunt configuration |
| Tolerance | ±2 %; ensures voltage accuracy within ±1.12 V at 25 °C for stable feedback loops |
| Differential Resistance (rdif) | ≤425 Ω at IZ = 2 mA; determines regulation stiffness and output impedance |
| Total Power Dissipation (Ptot) | 250 mW at Tamb ≤ 25 °C; sets maximum continuous DC power handling on standard FR4 PCB |
| Reverse Current (IR) | ≤200 μA at VR = 44.8 V; defines leakage-induced error in high-impedance bias networks |
| Junction Temperature (Tj) | −55 °C to +150 °C; enables operation in industrial ambient environments without derating below −40 °C |
| Non-repetitive Peak Reverse Current (IZSM) | 0.3 A at tp = 100 μs; supports short-duration surge clamping in ESD-protected interfaces |
Pinout & Package
Package: SOT23 (TO-236AB), surface-mount plastic package with 3 leads; compact 2.9 mm × 1.3 mm footprint, 1.1 mm height, and standard reflow-compatible solder lands.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connected to lower-potential node in shunt regulation; reverse-biased during normal operation |
| 2 | Not Connected (n.c.) | Internal die pad with no electrical connection; must remain unconnected on PCB |
| 3 | Cathode (K) | Connected to higher-potential node; carries reverse current during Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| Low-power Zener regulation | 250 mW Ptot enables use in space-constrained, thermally limited designs without heatsinking |
| ±2 % voltage tolerance | Meets tight reference requirements for analog sensing and feedback control where ±1.12 V deviation is acceptable |
| Standard SOT23 footprint | Ensures compatibility with automated pick-and-place and reflow processes across mainstream PCB assembly lines |
| 150 °C junction rating | Supports reliable operation in enclosed industrial enclosures with ambient temperatures up to +85 °C |
| Non-repetitive surge capability | 0.3 A IZSM at 100 μs allows transient suppression in low-energy signal line protection |
Applications
| Power Supply Feedback Reference | Overvoltage Clamp in Sensor Interface |
|---|---|
|
Use Scenario: Stabilizing output voltage of isolated DC-DC converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Shunt reference providing precise 56 V threshold to drive TL431-like comparator input. Use Value: ±2 % tolerance ensures output regulation within ±0.5 V over line/load variation in 48 V telecom supplies. |
Use Scenario: Protecting 3.3 V ADC input from accidental 48 V bus exposure in industrial fieldbus nodes. IC Role / Device Role / Timing Role: Passive clamp limiting voltage to 56 V before series resistor, preventing latch-up. Use Value: 425 Ω rdif limits fault current to <130 mA at 48 V, enabling safe energy dissipation in 250 mW package. |
| Low-Power Voltage Monitor | Reference for Precision Comparator |
|
Use Scenario: Detecting battery pack overvoltage in portable medical devices using discrete comparator circuitry. IC Role / Device Role / Timing Role: Stable 56 V reference against which battery string voltage is compared. Use Value: 200 μA IR at 44.8 V minimizes quiescent current draw in always-on monitoring circuits. |
Use Scenario: Setting trip point for window comparator in programmable logic controller (PLC) analog input module. IC Role / Device Role / Timing Role: Primary voltage reference defining upper threshold in dual-comparator architecture. Use Value: +0.05 mV/K temperature coefficient yields <0.3 V drift 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 MMBZ5256B | 56 V, ±5 % tolerance, 225 mW Ptot, 500 Ω rdif at 20 mA | Higher tolerance and lower power rating reduce accuracy and headroom in precision feedback | Select when cost sensitivity outweighs voltage stability requirements |
| Vishay BZX79-C56 | 56 V, ±5 % tolerance, 500 mW Ptot, DO-35 through-hole package | Larger package and looser tolerance limit use in dense SMT layouts requiring tight voltage control | Choose only for legacy through-hole designs or where higher power dissipation is mandatory |
Compared with MMBZ5256B and BZX79-C56, BZX84-B56,215 delivers tighter ±2 % tolerance and SOT23 compatibility while maintaining adequate surge margin - making it optimal for modern SMT-based 48 V system monitoring and regulation where board space and accuracy are constrained.
Availability
BZX84-B56,215 is available at Aetrix Electronics and suitable for power supply feedback references, overvoltage clamps, low-power voltage monitors, and precision comparator thresholds requiring stable component supply and consistent parametric performance.
Supply support for BZX84-B56,215 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 global semiconductor manufacturer specializing in high-volume, high-reliability discrete and logic devices, with core expertise in automotive-qualified and industrial-grade components.
The BZX84 series belongs to Nexperia's precision Zener diode product line, engineered for low-power voltage regulation and reference applications in consumer, industrial, and communications equipment where SMT compatibility and parametric consistency are critical.
FAQ
What is the Zener test current for BZX84-B56,215?
The specified Zener voltage of 56 V is measured at a test current of 2 mA, per Table 9 in the Nexperia datasheet Rev. 7. This current level balances measurement stability with minimal self-heating, and is used to define both VZ and differential resistance parameters.
Can BZX84-B56,215 be used in place of a 5.6 V Zener diode?
No - BZX84-B56,215 is a 56 V Zener diode, not 5.6 V. The "56" in the part number denotes nominal breakdown voltage in volts. Substituting it for a 5.6 V device would result in catastrophic failure due to excessive reverse voltage across the load.
Is pin 2 electrically functional in BZX84-B56,215?
No - pin 2 is explicitly marked "n.c." (not connected) in the official Nexperia pinning diagram. It is an internal mechanical tie-bar with no electrical connection to the die; PCB layout must leave this pad unconnected to avoid unintended shorts or parasitic coupling.
What is the maximum allowable ambient temperature for continuous operation?
At full 250 mW power dissipation, the maximum ambient temperature is 25 °C per the datasheet's Ptot specification. With derating at 2.0 mW/°C above 25 °C (calculated from Rth(j-a) = 500 K/W), continuous operation is viable up to +85 °C ambient when power dissipation is reduced to ≤130 mW.
BZX84-B56,215 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX84
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 56 V
- Tolerance:
- ±2%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 200 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 39.2 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BZX84-B56,215 FAQ
1.How can I place an order for BZX84-B56,215 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84-B56,215 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 BZX84-B56,215 reliable?
The price and inventory of BZX84-B56,215 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-B56,215 is usually 5 days.
3.What payment methods are accepted for BZX84-B56,215?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-B56,215 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84-B56,215?
BZX84-B56,215 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84-B56,215 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 BZX84-B56,215?
For technical support, including BZX84-B56,215 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-B56,215 requirements.
6.How does Aetrix verify that BZX84-B56,215 is sourced from the original manufacturer or authorized distributors?
All BZX84-B56,215 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 BZX84-B56,215 meets industry standards.
7.What is the process for return or replacement of BZX84-B56,215?
All BZX84-B56,215 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-B56,215, 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 BZX84-B56,215 part is unused and in its original packaging.
Return procedure for BZX84-B56,215:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84-B56,215 Tags
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