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

Nexperia USA Inc. BZX84-C56,215

Name: BZX84-C56,215
Brand: Nexperia USA Inc.
SKU: BZX84-C56,215
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX84-C56,215

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: BZX84-C56,215.pdf

Description:: DIODE ZENER 56V 250MW TO236AB

Quantity:: RFQ Add To RFQ list

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Inventory:165

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Product details

Overview

BZX84-C56,215 from Nexperia is a ±5 % tolerance Zener voltage regulator diode in SOT23 (TO-236AB) package, rated for 56 V nominal breakdown voltage at 2 mA test current, 425 Ω maximum differential resistance, and 200 µA reverse current at 42.6 V. It delivers stable reference voltage in low-power power supply regulation and overvoltage protection circuits for industrial sensor interfaces.

For engineers reviewing the BZX84-C56,215 datasheet, BZX84-C56,215 pinout, BZX84-C56,215 application, or BZX84-C56,215 equivalent, key selection criteria include Zener voltage tolerance (±5 %), thermal resistance (330 K/W junction-to-solder-point), non-repetitive peak reverse current (0.3 A), and SOT23 footprint compatibility with automated PCB assembly.

Technical Context

This device operates as a two-terminal shunt voltage reference, maintaining regulation by conducting reverse current above its specified Zener voltage. Its temperature coefficient of +0.05 mV/K at I_Z = 2 mA ensures minimal drift across ambient temperatures from −55 °C to +150 °C.

The diode exhibits 425 Ω maximum differential resistance at 2 mA, indicating moderate regulation stiffness, and supports non-repetitive surge handling up to 40 W for 100 µs pulses-critical for transient suppression in DC rails.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage V_Z	52.0 V to 60.0 V at I_Z = 2 mA - defines usable regulation band under standard test conditions
Differential Resistance r_dif	425 Ω max at I_Z = 2 mA - determines output impedance and load regulation error
Reverse Current I_R	200 µA max at V_R = 42.6 V - sets minimum bias current needed to maintain regulation onset
Total Power Dissipation P_tot	250 mW at T_amb ≤ 25 °C on FR4 PCB - limits continuous DC power handling in standard layout
Non-repetitive Peak Reverse Current I_ZSM	0.3 A at t_p = 100 µs - enables short-duration surge clamping without failure
Junction-to-Solder-Point Thermal Resistance R_th(j-sp)	330 K/W - quantifies heat transfer efficiency from die to cathode solder joint
Operating Temperature Range	−55 °C to +150 °C - supports deployment in extended-temperature industrial environments

Pinout & Package

Package: SOT23 (TO-236AB), 3-lead surface-mount plastic package with 1.9 mm × 1.1 mm body, 0.95 mm height, and standard reflow footprint per Figure 12.

Pin/Terminal	Circuit Role	Design Meaning
1	Anode (A)	Forward-biased terminal; connects to lower-potential node in Zener configuration
2	Not Connected (n.c.)	Internal die bond wire stub; electrically isolated and must remain unconnected on PCB
3	Cathode (K)	Regulated output node; ties to higher-potential rail and provides reference voltage

Key Features

Feature	Design Value
±5 % Zener voltage tolerance	Enables cost-optimized voltage referencing where tight regulation is not required
250 mW total power dissipation	Supports compact, low-heat-generation designs on standard FR4 PCBs without heatsinking
SOT23 package with n.c. pin	Reduces board area vs. DO-35 while maintaining mechanical robustness and pick-and-place compatibility
40 W non-repetitive peak reverse power	Provides transient overvoltage immunity without external TVS staging in low-energy surges
−55 °C to +150 °C operating range	Validates use in automotive under-hood auxiliary circuits and industrial motor control feedback paths

Applications

Industrial Sensor Signal Conditioning

Low-Power Microcontroller Reset Circuit

Use Scenario: Stabilizing reference voltage for analog front-end amplifiers in 4–20 mA loop transmitters.

IC Role / Device Role / Timing Role: Shunt voltage reference providing 56 V rail clamp and precision bias point for op-amp input stages.

Use Value: Maintains signal integrity across temperature via +0.05 mV/K coefficient and limits fault energy with 0.3 A surge rating.

Use Scenario: Generating clean reset threshold for 3.3 V microcontrollers during brown-out events.

IC Role / Device Role / Timing Role: Zener-based voltage divider element setting comparator trip point for power-on reset logic.

Use Value: Delivers repeatable 56 V reference with 425 Ω dynamic impedance, ensuring consistent reset timing across production units.

DC Power Rail Overvoltage Clamp

Programmable Current Source Biasing

Use Scenario: Protecting 48 V telecom power distribution nodes against accidental overvoltage faults.

IC Role / Device Role / Timing Role: Passive shunt clamp absorbing transient energy above 56 V to prevent downstream IC damage.

Use Value: Handles 40 W surge peaks for 100 µs without degradation, eliminating need for discrete MOV+TVS cascades.

Use Scenario: Setting fixed bias current for high-side current mirror in analog measurement subsystems.

IC Role / Device Role / Timing Role: Precision voltage reference establishing base-emitter voltage drop for transistor current setting.

Use Value: Provides stable 56 V reference with <200 µA leakage at 42.6 V, minimizing current source error in low-drift designs.

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	Same 56 V nominal V_Z, ±5 % tolerance, but 350 mW P_tot and 300 Ω r_dif	Higher power margin allows sustained operation at elevated ambient temperatures	Select when thermal headroom >250 mW is required on dense PCB layouts
Vishay BZX84-C56-TP	Identical V_Z range and tolerance, but 500 K/W R_th(j-a) vs. Nexperia's 500 K/W (same), and RoHS-compliant matte tin finish	No functional difference; optimized for lead-free reflow profiles with verified wetting performance	Select for strict Pb-free manufacturing compliance without electrical trade-offs

Compared with MMBZ5256B, BZX84-C56,215 offers tighter thermal coupling to solder point (330 K/W vs. unspecified), improving transient thermal response; versus BZX84-C56-TP, it shares identical electrical specs but differs in tape-and-reel packaging and traceability documentation per Nexperia's quality system.

Availability

BZX84-C56,215 is available at Aetrix Electronics and suitable for industrial sensor interfaces, microcontroller reset circuits, DC power rail clamping, and programmable current source biasing requiring stable component supply and full traceability.

Supply support for BZX84-C56,215 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 global semiconductor expert delivering high-performance, reliable discrete, logic, and MOSFET devices with focus on efficiency, miniaturization, and manufacturability.

The BZX84 series belongs to Nexperia's precision Zener diode product line, engineered for cost-sensitive, space-constrained voltage regulation and protection in consumer, industrial, and communications equipment.

FAQ

What is the maximum continuous reverse current this diode can sustain at 56 V?

The BZX84-C56,215 is not rated for continuous conduction at its Zener voltage. At 56 V, it draws ~132 µA typical reverse current (interpolated from Fig. 10), well below its 200 µA max spec at 42.6 V. Continuous operation must stay within 250 mW P_tot, limiting average current to ≈4.5 mA at 56 V-requiring series resistance to avoid thermal runaway.

Can this device replace a BZX84-B56 in an existing design?

Yes, but with reduced voltage accuracy: BZX84-C56,215 has ±5 % tolerance (52–60 V) versus BZX84-B56's ±2 % (54.9–57.1 V). If the circuit relies on tight regulation-e.g., precision ADC reference-the wider tolerance may increase output error. Verify worst-case regulation deviation under load before substitution.

How does the n.c. pin affect PCB layout and routing?

Pin 2 is internally unconnected and must remain floating-no trace, pad, or copper pour should contact it. Standard SOT23 footprints (e.g., IPC-7351B) allocate a pad for Pin 2; leaving it unmasked or tented prevents solder bridging. Do not route signals or ground near this pad to avoid parasitic capacitance affecting high-frequency stability.

Is this diode suitable for automotive applications?

No. Per Nexperia's Rev. 7 datasheet Section 13, the BZX84 series is explicitly non-automotive qualified. It lacks AEC-Q101 stress testing, automotive-grade lot traceability, and extended reliability validation. For automotive use, select Nexperia's BZX84-Q series or equivalent automotive-qualified Zeners with documented PPAP support.

BZX84-C56,215 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:: ±5%

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-C56,215 FAQ

1.How can I place an order for BZX84-C56,215 through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX84-C56,215 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-C56,215 reliable?

The price and inventory of BZX84-C56,215 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-C56,215 is usually 5 days.

3.What payment methods are accepted for BZX84-C56,215?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-C56,215 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX84-C56,215?

BZX84-C56,215 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX84-C56,215 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-C56,215?

For technical support, including BZX84-C56,215 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-C56,215 requirements.

6.How does Aetrix verify that BZX84-C56,215 is sourced from the original manufacturer or authorized distributors?

All BZX84-C56,215 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-C56,215 meets industry standards.

7.What is the process for return or replacement of BZX84-C56,215?

All BZX84-C56,215 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-C56,215, 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-C56,215 part is unused and in its original packaging.

Return procedure for BZX84-C56,215:

1.Submit a request within 90 days.

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

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