Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Nexperia USA Inc. BZX84-C13/DG/B3,21

Name: BZX84-C13/DG/B3,21
Brand: Nexperia USA Inc.
SKU: BZX84-C13/DG/B3,21
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: BZX84-C13/DG/B3,21

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: BZX84-C13/DG/B3,21.pdf

Description:: DIODE ZENER 13.25V 250MW TO236AB

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:2,475

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

BZX84-C13/DG/B3,21 from Nexperia is a 13 V ±5 % tolerance Zener voltage regulator diode in SOT23 (TO-236AB) package, rated for 250 mW total power dissipation at 25 °C ambient, with 12.4–14.1 V breakdown range at I_Z = 5 mA and 80 Ω max differential resistance. It serves as a precision reference or overvoltage clamp in low-power analog supply rails and signal-level protection circuits.

For engineers reviewing the BZX84-C13/DG/B3,21 datasheet, BZX84-C13/DG/B3,21 pinout, BZX84-C13/DG/B3,21 application, or BZX84-C13/DG/B3,21 equivalent, key selection criteria include its ±5 % tolerance band, 13 V nominal Zener voltage at 5 mA test current, non-repetitive peak reverse power capability of 40 W, thermal resistance of 500 K/W (junction-to-ambient), and SOT23-compatible footprint for space-constrained PCB layouts.

Technical Context

This device operates in reverse-bias breakdown mode to maintain stable DC voltage across its cathode-anode terminals under varying load or input conditions. Its Zener voltage is specified at I_Z = 5 mA with a temperature coefficient of +7.0 to +11.0 mV/K, indicating positive drift with junction temperature rise.

The diode exhibits 30 μA max reverse leakage at VR = 10.4 V, 80 Ω max dynamic impedance at I_Z = 5 mA, and forward voltage ≤0.9 V at IF = 10 mA - confirming suitability for bidirectional clamping and low-loss biasing applications.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	12.4 V to 14.1 V at I_Z = 5 mA - defines regulated output voltage window under standard test condition
Tolerance	±5 % - specifies maximum deviation from nominal 13 V rating, suitable for non-critical voltage references
Power Dissipation (P_tot)	250 mW at T_amb ≤ 25 °C - sets continuous DC power limit on FR4 PCB with standard footprint
Differential Resistance (r_dif)	≤80 Ω at I_Z = 5 mA - determines regulation stiffness and output voltage variation under load changes
Reverse Leakage (I_R)	≤30 μA at V_R = 10.4 V - indicates low standby current in clamping or reference configurations
Non-repetitive Peak Power	40 W for t_p = 100 μs - enables transient surge suppression without device failure
Junction Temperature (T_j)	−55 °C to +150 °C - defines operational thermal envelope for industrial and extended-temperature designs

Pinout & Package

Package: SOT23 (TO-236AB), surface-mount plastic package with 3 leads, 1.9 mm × 1.1 mm body, 0.45 mm lead pitch, 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 regulation or clamping
2	Not Connected (n.c.)	Internally unconnected lead; must remain floating or grounded per layout best practice
3	Cathode (K)	Reverse-biased terminal; connects to higher-potential node and carries Zener current during regulation

Key Features

Feature	Design Value
Low-profile SMT packaging	SOT23 footprint enables high-density placement on compact PCBs without through-hole drilling
Controlled Zener tolerance	±5 % band ensures predictable regulation within cost-sensitive consumer and industrial power supplies
Thermal robustness	150 °C max junction temperature supports operation in enclosed enclosures or near heat sources
Pulse survivability	40 W non-repetitive peak power rating allows use in ESD and surge protection stages
Low forward voltage	≤0.9 V at 10 mA enables efficient biasing in dual-direction clamp circuits

Applications

Power Supply Reference

Signal-Level Clamping

Use Scenario: Stabilizing feedback voltage in linear regulators or op-amp reference nodes.

IC Role / Device Role / Timing Role: Zener diode provides fixed 13 V reference point for error amplifier comparison.

Use Value: Maintains ±5 % output accuracy across temperature and load, reducing need for trimming resistors.

Use Scenario: Limiting analog sensor output swing to protect ADC inputs from overvoltage.

IC Role / Device Role / Timing Role: Bidirectional clamp (anode to GND, cathode to signal line) limits excursion to 13 V + 0.9 V.

Use Value: Prevents ADC saturation while adding <1 μA leakage at 10.4 V, preserving signal integrity.

Overvoltage Protection

Low-Power Bias Generation

Use Scenario: Safeguarding microcontroller I/O pins against transient surges on industrial control lines.

IC Role / Device Role / Timing Role: Cathode tied to protected line, anode to ground; conducts only above 13 V threshold.

Use Value: Absorbs up to 40 W for 100 μs pulses without degradation, meeting IEC 61000-4-5 Level 3 requirements.

Use Scenario: Generating stable bias voltage for JFET amplifiers or comparator hysteresis networks.

IC Role / Device Role / Timing Role: Operates in Zener region at 1–5 mA to deliver low-noise, temperature-compensated DC offset.

Use Value: Delivers 13 V ±5 % with <80 Ω dynamic impedance, minimizing bias drift under varying current draw.

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 MMBZ5243B	13 V ±5 %, 350 mW P_tot, 100 Ω r_dif, SOT23 package	Higher power rating but looser regulation stiffness; less precise for reference use	Select when higher continuous power margin is required and 100 Ω impedance is acceptable
Vishay BZX84-C13-TP	13 V ±5 %, 300 mW P_tot, 80 Ω r_dif, same SOT23 footprint, AEC-Q200 not qualified	Identical regulation specs but different marking and traceability; no automotive qualification	Choose for second-source procurement where identical electrical behavior and form factor are critical

Compared with BZX84-C13/DG/B3,21, MMBZ5243B trades regulation precision for higher power headroom, while BZX84-C13-TP offers direct functional equivalence with alternate logistics handling - making the original Nexperia part optimal for designs prioritizing thermal resistance (500 K/W) and proven field reliability in industrial SMT assemblies.

Availability

BZX84-C13/DG/B3,21 is available at Aetrix Electronics and suitable for power supply reference design, signal-level clamping, overvoltage protection, and low-power bias generation requiring stable component supply and consistent SOT23 assembly performance.

Supply support for BZX84-C13/DG/B3,21 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 semiconductor manufacturer headquartered in Nijmegen, Netherlands, specializing in high-volume logic, discrete, and MOSFET solutions with emphasis on efficiency, reliability, and miniaturization.

The BZX84 series belongs to Nexperia's precision Zener diode product line, engineered for cost-effective voltage regulation and clamping in consumer, industrial, and communications equipment where ±1 % to ±5 % tolerance and SOT23 scalability are essential.

FAQ

What is the Zener test current for BZX84-C13/DG/B3,21?

The nominal Zener voltage of 13 V is specified at a test current of 5 mA, with guaranteed minimum and maximum values of 12.4 V and 14.1 V respectively. This current level balances measurement stability and self-heating effects, and is the standard condition used across the BZX84-C series for voltage binning and datasheet characterization.

Can BZX84-C13/DG/B3,21 be used in automotive applications?

No - this variant is not automotive-qualified. The datasheet explicitly states that BZX84-C13/DG/B3,21 is non-automotive and lacks AEC-Q200 qualification. For automotive use, Nexperia offers separate -Q qualified variants (e.g., BZX84-C13-Q), which undergo additional stress testing and lot traceability per automotive standards.

What does the 'n.c.' pin (pin 2) mean in practice?

Pin 2 is internally not connected and must remain electrically floating in the PCB layout. It should not be soldered to ground or any net, as doing so may compromise mechanical reliability or cause unintended thermal coupling. Standard SOT23 footprints accommodate this lead without connection, and no external circuit function is assigned to it.

How does temperature affect the Zener voltage of this diode?

At I_Z = 5 mA, the temperature coefficient ranges from +7.0 to +11.0 mV/K, meaning the Zener voltage increases by approximately 7–11 mV per degree Celsius rise in junction temperature. This positive drift is typical for Zeners above 5.6 V and must be accounted for in precision reference designs operating across wide ambient ranges.

BZX84-C13/DG/B3,21 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):: 13.25 V

Tolerance:: ±5%

Power - Max:: 250 mW

Impedance (Max) (Zzt):: 30 Ohms

Current - Reverse Leakage @ Vr:: 100 nA @ 8 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-C13/DG/B3,21 FAQ

1.How can I place an order for BZX84-C13/DG/B3,21 through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX84-C13/DG/B3,21 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-C13/DG/B3,21 reliable?

The price and inventory of BZX84-C13/DG/B3,21 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-C13/DG/B3,21 is usually 5 days.

3.What payment methods are accepted for BZX84-C13/DG/B3,21?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-C13/DG/B3,21 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX84-C13/DG/B3,21?

BZX84-C13/DG/B3,21 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX84-C13/DG/B3,21 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-C13/DG/B3,21?

For technical support, including BZX84-C13/DG/B3,21 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-C13/DG/B3,21 requirements.

6.How does Aetrix verify that BZX84-C13/DG/B3,21 is sourced from the original manufacturer or authorized distributors?

All BZX84-C13/DG/B3,21 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-C13/DG/B3,21 meets industry standards.

7.What is the process for return or replacement of BZX84-C13/DG/B3,21?

All BZX84-C13/DG/B3,21 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-C13/DG/B3,21, 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-C13/DG/B3,21 part is unused and in its original packaging.

Return procedure for BZX84-C13/DG/B3,21:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…