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

Nexperia USA Inc. BZX84-C5V1/DG/B3,2

Name: BZX84-C5V1/DG/B3,2
Brand: Nexperia USA Inc.
SKU: BZX84-C5V1/DG/B3,2
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX84-C5V1/DG/B3,2

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: BZX84-C5V1/DG/B3,2.pdf

Description:: DIODE ZENER 5.1V 250MW TO236AB

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Inventory:7,786

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Product details

Overview

BZX84-C5V1/DG/B3,2 from Nexperia is a 5.1 V ±5 % tolerance Zener voltage regulator diode in SOT23 (TO-236AB) package, rated for 250 mW total power dissipation at 25 °C ambient, with 480 Ω max differential resistance at 5 mA and 2 µA max reverse current at 3.8 V. It serves as a precision shunt reference in low-power linear regulators and overvoltage protection circuits.

For engineers reviewing the BZX84-C5V1/DG/B3,2 datasheet, BZX84-C5V1/DG/B3,2 pinout, BZX84-C5V1/DG/B3,2 application, or BZX84-C5V1/DG/B3,2 equivalent, key selection criteria include Zener voltage tolerance (±5 %), thermal resistance (500 K/W junction-to-ambient), non-repetitive peak reverse power (40 W), and cathode/anode pin assignment in SOT23.

Technical Context

This device operates in reverse-bias breakdown mode to maintain stable voltage across its terminals under varying load and input conditions. Its Zener voltage is specified at 5.1 V nominal with ±5 % tolerance (4.8 V to 5.4 V), measured at 5 mA test current, and exhibits a temperature coefficient of −2.7 mV/K at that current.

The diode features a 2-pin active configuration (anode and cathode) with Pin 2 internally unconnected, enabling use in space-constrained PCB layouts. Its 40 W non-repetitive peak reverse power rating supports transient surge suppression when paired with appropriate series impedance.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	4.8 V to 5.4 V at I_Z = 5 mA - defines regulation window for stable reference generation
Differential Resistance (r_dif)	≤480 Ω at I_Z = 5 mA - determines output impedance and load regulation sensitivity
Reverse Current (I_R)	≤2 µA at V_R = 3.8 V - ensures minimal leakage before breakdown onset
Total Power Dissipation (P_tot)	250 mW at T_amb ≤ 25 °C on FR4 PCB - sets continuous DC power limit under standard mounting
Non-repetitive Peak Reverse Power (P_ZSM)	40 W for t_p = 100 µs - enables short-duration surge clamping without failure
Junction-to-Ambient Thermal Resistance (R_th(j-a))	500 K/W - quantifies self-heating under free-air conditions; critical for derating above 25 °C
Forward Voltage (V_F)	≤0.9 V at I_F = 10 mA - relevant for forward-bias testing and ESD path analysis

Pinout & Package

Package: SOT23 (TO-236AB), 3-terminal surface-mount plastic package with standard footprint per Figure 12 (reflow) and Figure 13 (wave soldering); dimensions per Figure 11.

Pin/Terminal	Circuit Role	Design Meaning
1	Anode (A)	Connected to lower-potential side of regulated node; current enters here during reverse breakdown
2	Not Connected (n.c.)	Internally isolated; no electrical function; must remain unconnected on PCB
3	Cathode (K)	Connected to higher-potential side; voltage reference point and primary heat path to PCB copper

Key Features

Feature	Design Value
Low-power Zener regulation	250 mW P_tot enables use in battery-powered and energy-sensitive designs without heatsinking
±5 % voltage tolerance	Supports cost-optimized designs where tight regulation is not required, reducing BOM cost vs. ±1 % variants
SOT23 package compatibility	Standardized footprint allows drop-in replacement across BZX84-A/B/C series and broad design reuse
40 W surge capability	Permits integration into basic transient voltage suppression circuits without external TVS devices
150 °C maximum junction temperature	Enables operation in industrial environments with elevated ambient temperatures when properly derated

Applications

Power Supply Reference

Overvoltage Clamp

Use Scenario: Providing stable 5.1 V reference for adjustable LDO feedback networks in microcontroller power rails.

IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise output setpoint via resistor divider feedback.

Use Value: Maintains ±5 % output accuracy across temperature and load variations without active compensation circuitry.

Use Scenario: Protecting 5 V logic inputs from ESD or supply rail overshoot in USB peripheral interfaces.

IC Role / Device Role / Timing Role: Passive clamp limiting voltage excursions to ≤5.4 V during transients.

Use Value: Absorbs up to 40 W for 100 µs without degradation, eliminating need for larger TVS diodes in low-energy events.

Signal Level Translation

Current Source Bias

Use Scenario: Converting 3.3 V GPIO signals to 5 V-compatible levels using resistor-Zener level-shifter topology.

IC Role / Device Role / Timing Role: Voltage-limited sink defining high-level threshold for downstream 5 V receivers.

Use Value: Enables bidirectional level translation with <1 µA leakage below 3.8 V, preserving signal integrity.

Use Scenario: Setting bias current for low-noise op-amp input stages in sensor front-ends.

IC Role / Device Role / Timing Role: Stable voltage source driving constant-current generator transistor base.

Use Value: Delivers <0.5 % drift over 0–70 °C due to predictable −2.7 mV/K temperature coefficient at 5 mA.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener regulation applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor MMBZ5222BS	Same 5.1 V nominal, ±5 % tolerance, SOT23 package, but 350 mW P_tot and 600 Ω r_dif	Higher power rating suits margin-critical designs; higher r_dif reduces regulation precision	Select when higher continuous dissipation is needed and tighter regulation is not required
Vishay BZX84-C5V1-TP	Identical 5.1 V/±5 %/SOT23 spec, but 200 mW P_tot and 500 Ω r_dif; RoHS-compliant, AEC-Q200 not claimed	Lower power rating restricts use in sustained-load scenarios; same thermal profile as Nexperia part	Select for cost-sensitive consumer applications where 200 mW suffices and lead-free compliance is mandatory

Compared with MMBZ5222BS and BZX84-C5V1-TP, the BZX84-C5V1/DG/B3,2 offers optimal balance of regulation precision (480 Ω r_dif), thermal performance (500 K/W), and surge resilience (40 W), making it preferred for industrial-grade reference and clamp functions where long-term stability matters.

Availability

BZX84-C5V1/DG/B3,2 is available at Aetrix Electronics and suitable for low-power voltage reference, overvoltage protection, and signal-level translation requiring stable component supply and consistent parametric performance across production lots.

Supply support for BZX84-C5V1/DG/B3,2 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 BZX84 series belongs to Nexperia's precision Zener diode product line, engineered for cost-effective, space-efficient voltage regulation in consumer, industrial, and computing applications where ±5 % tolerance meets system requirements.

FAQ

What is the maximum continuous reverse current this diode can sustain at 5.1 V?

The BZX84-C5V1/DG/B3,2 is not rated for continuous reverse current at its Zener voltage; instead, it is characterized by Zener test current (I_Z = 5 mA) and maximum power dissipation (250 mW). At 5.1 V, continuous current must be limited to ≤49 mA (250 mW ÷ 5.1 V) to avoid exceeding P_tot, assuming full derating at 25 °C ambient.

Can Pin 2 be used as a thermal pad or grounded for improved heat dissipation?

No - Pin 2 is explicitly marked "not connected" in the datasheet and is internally isolated. Connecting it to ground, V_CC, or a thermal plane violates the device's pinning specification and may cause unpredictable behavior or reliability issues; only Pins 1 (anode) and 3 (cathode) are electrically functional.

How does the −2.7 mV/K temperature coefficient affect regulation accuracy over −40 °C to +85 °C?

With a −2.7 mV/K coefficient at 5 mA, the Zener voltage shifts approximately −340 mV across a 125 K range (−40 °C to +85 °C), resulting in a worst-case V_Z of ~4.76 V at +85 °C. This is within the ±5 % initial tolerance band (4.8 V–5.4 V), confirming stable operation across industrial temperature ranges.

Is this part suitable for automotive applications per AEC-Q200?

No - the BZX84-C5V1/DG/B3,2 is explicitly designated as non-automotive qualified in the revision history (Section 13). Nexperia offers separate AEC-Q200-qualified variants (e.g., BZX84-Q series) with extended temperature testing, qualification reports, and automotive-specific traceability; this part lacks those certifications and is intended for industrial/consumer use only.

BZX84-C5V1/DG/B3,2 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Voltage - Zener (Nom) (Vz):: 5.1 V

Tolerance:: ±5%

Power - Max:: 250 mW

Impedance (Max) (Zzt):: 60 Ohms

Current - Reverse Leakage @ Vr:: 2 µA @ 2 V

Voltage - Forward (Vf) (Max) @ If:: 900 mV @ 10 mA

Operating Temperature:: -65°C ~ 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: TO-236AB

BZX84-C5V1/DG/B3,2 FAQ

1.How can I place an order for BZX84-C5V1/DG/B3,2 through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX84-C5V1/DG/B3,2 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-C5V1/DG/B3,2 reliable?

The price and inventory of BZX84-C5V1/DG/B3,2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-C5V1/DG/B3,2 is usually 5 days.

3.What payment methods are accepted for BZX84-C5V1/DG/B3,2?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-C5V1/DG/B3,2 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX84-C5V1/DG/B3,2?

BZX84-C5V1/DG/B3,2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX84-C5V1/DG/B3,2 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-C5V1/DG/B3,2?

For technical support, including BZX84-C5V1/DG/B3,2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-C5V1/DG/B3,2 requirements.

6.How does Aetrix verify that BZX84-C5V1/DG/B3,2 is sourced from the original manufacturer or authorized distributors?

All BZX84-C5V1/DG/B3,2 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-C5V1/DG/B3,2 meets industry standards.

7.What is the process for return or replacement of BZX84-C5V1/DG/B3,2?

All BZX84-C5V1/DG/B3,2 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-C5V1/DG/B3,2, 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-C5V1/DG/B3,2 part is unused and in its original packaging.

Return procedure for BZX84-C5V1/DG/B3,2:

1.Submit a request within 90 days.

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

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