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

Nexperia USA Inc. BZX84-C11,235

Name: BZX84-C11,235
Brand: Nexperia USA Inc.
SKU: BZX84-C11,235
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX84-C11,235

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: BZX84-C11,235.pdf

Description:: DIODE ZENER 11V 250MW TO236AB

Quantity:: RFQ Add To RFQ list

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Inventory:35

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Product details

Overview

BZX84-C11,235 from Nexperia is a ±5 % tolerance Zener voltage regulator diode in SOT23 (TO-236AB) package, rated for 11 V nominal breakdown voltage at 5 mA, 250 mW total power dissipation, and 150 °C maximum junction temperature - used for precision low-power voltage reference and overvoltage protection in sensor biasing, power supply feedback, and microcontroller reset circuits.

For engineers reviewing the BZX84-C11,235 datasheet, BZX84-C11,235 pinout, BZX84-C11,235 application, or BZX84-C11,235 equivalent, key selection criteria include Zener voltage tolerance (±5 %), differential resistance (≤150 Ω at I_Z = 5 mA), non-repetitive peak reverse power (40 W), thermal resistance (330 K/W to solder point), and SOT23 footprint compatibility with automated assembly.

Technical Context

This Zener diode operates in reverse-bias breakdown mode to maintain stable voltage across its terminals under varying load or input conditions. Its regulation relies on controlled avalanche and Zener mechanisms, with temperature coefficient of +5.4 mV/K at I_Z = 5 mA - indicating positive drift with rising temperature.

Designed for surface-mount use on FR4 PCBs with single-sided 70 µm copper, it delivers 11.0 V ±5 % (10.4 V to 11.6 V) regulation at 5 mA test current, with ≤150 Ω dynamic impedance and ≤2 µA reverse leakage at 8.8 V (0.8 × V_Z).

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	11.0 V nominal at I_Z = 5 mA; actual range 10.4 V to 11.6 V (±5 % tolerance)
Power Dissipation (P_tot)	250 mW at T_amb ≤ 25 °C on standard FR4 PCB - defines continuous DC operating limit
Differential Resistance (r_dif)	≤150 Ω at I_Z = 5 mA - determines regulation stiffness against load current changes
Reverse Leakage (I_R)	≤2 µA at V_R = 8.8 V (0.8 × V_Z) - ensures minimal quiescent current in standby
Peak Pulse Power (P_ZSM)	40 W for t_p = 100 µs - supports transient overvoltage clamping without failure
Junction Temperature (T_j)	−55 °C to +150 °C - enables operation in industrial ambient environments
Thermal Resistance (R_th(j-sp))	330 K/W to cathode solder point - critical for thermal design when mounted on PCB

Pinout & Package

SOT23 (TO-236AB) plastic surface-mounted package with 3 leads; 1.9 mm × 1.3 mm footprint, 1.1 mm height, and gull-wing lead form compatible with reflow and wave soldering per Figures 12–13 in datasheet Rev. 7.

Pin/Terminal	Circuit Role	Design Meaning
1	Anode (A)	Connected to lower-potential node; forward-biased during conduction, reverse-biased during Zener operation
2	Not Connected (n.c.)	Internally unconnected terminal - must remain floating; no PCB trace or pad required
3	Cathode (K)	Connected to higher-potential node; primary heat path to PCB via solder point (R_th(j-sp) = 330 K/W)

Key Features

Feature	Design Value
±5 % Zener voltage tolerance	Enables cost-effective regulation where tight accuracy is not required - e.g., non-critical biasing or coarse voltage references
250 mW continuous power rating	Supports stable operation in low-current applications (<20 mA) without external heatsinking on standard PCBs
40 W non-repetitive pulse capability	Clamps ESD or surge events up to 100 µs duration without degradation - suitable for I/O line protection
SOT23 package with n.c. pin	Reduces board space vs. DO-35; n.c. pin allows standardized footprint across full BZX84 series (A/B/C variants)
+5.4 mV/K temperature coefficient	Compensates for negative TC of other components (e.g., transistors) in mixed-technology reference circuits

Applications

Microcontroller Reset Circuit

ADC Reference Stabilization

Use Scenario: Provides clean, stable 11 V reference to reset supervisor IC (e.g., MAX809) during power-up and brownout.

IC Role / Device Role / Timing Role: Zener voltage reference establishing threshold for reset assertion timing.

Use Value: Ensures reset remains asserted until V_CC exceeds 11 V × 0.95 = 10.45 V, preventing premature MCU boot.

Use Scenario: Supplies regulated 11 V to ADC voltage reference input (e.g., ADS1115 REF pin) in battery-powered sensor nodes.

IC Role / Device Role / Timing Role: Precision analog voltage source defining full-scale conversion range.

Use Value: Limits ADC INL error to <±0.5 LSB by holding reference within ±5 % across 2.4–75 V input range variations.

Op-Amp Bias Network

Overvoltage Clamp for RS-485 Transceiver

Use Scenario: Sets common-mode voltage for rail-to-rail op-amp (e.g., TLV2462) in single-supply signal conditioning stage.

IC Role / Device Role / Timing Role: DC bias generator stabilizing input common-mode level independent of supply ripple.

Use Value: Maintains op-amp input stage within linear region despite ±100 mV supply noise, reducing distortion by >12 dB.

Use Scenario: Clamps bus voltage spikes on RS-485 A/B lines (e.g., SN65HVD72) during ESD events or cable discharge.

IC Role / Device Role / Timing Role: Fast-acting shunt protector diverting transient energy to ground before IC damage.

Use Value: Limits line voltage to ≤11.6 V during 40 W/100 µs surges, meeting IEC 61000-4-2 Level 4 (15 kV air) requirements.

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 MMBZ5240BLT1G	10 V nominal, ±5 %, 225 mW P_tot, 170 Ω r_dif - lower voltage, slightly higher impedance	Requires circuit redesign for 10 V vs. 11 V reference; less effective for 11 V reset thresholds	Select only if 10 V regulation suffices and legacy ON Semi sourcing is preferred.
Vishay BZX84-C10-TP	10 V nominal, ±5 %, 250 mW P_tot, 150 Ω r_dif - identical power/impedance but 1 V lower V_Z	Not drop-in for 11 V designs; may cause false resets or reference scaling errors	Use only in new 10 V reference designs where tighter V_Z matching to Vishay's production lot is needed.

Compared with BZX84-C11,235, MMBZ5240BLT1G offers marginally better thermal resistance (290 K/W) but sacrifices 1 V regulation headroom, while BZX84-C10-TP matches power and impedance specs exactly but cannot satisfy 11 V system requirements without circuit-level compensation.

Availability

BZX84-C11,235 is available at Aetrix Electronics and suitable for microcontroller reset circuits, ADC reference stabilization, op-amp bias networks, and RS-485 overvoltage clamping requiring stable component supply, consistent parametric performance, and SOT23 footprint compatibility.

Supply support for BZX84-C11,235 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-sensitive, space-constrained applications demanding stable voltage regulation without active circuitry.

FAQ

What is the exact Zener voltage range for BZX84-C11,235 at 5 mA test current?

The BZX84-C11,235 has a guaranteed Zener voltage range of 10.4 V to 11.6 V at I_Z = 5 mA and T_j = 25 °C, reflecting its ±5 % tolerance grade. This range is validated per Table 8 in the Rev. 7 datasheet and applies under standard FR4 mounting conditions with 70 µm copper.

Can BZX84-C11,235 replace BZX84-C10 in an existing 10 V reference design?

No - BZX84-C11,235 delivers 11 V nominal regulation, which exceeds the 10 V target by 10 %. Substituting it would raise reference voltage, shift ADC full-scale range, and potentially violate reset threshold margins. A direct replacement requires verification of system tolerance to +10 % V_REF shift.

What is the maximum continuous forward current this diode can handle?

The absolute maximum forward current is 200 mA per Table 5 (Limiting Values), but forward conduction is not its intended operating mode. In Zener regulation, it operates in reverse bias; forward voltage is specified as ≤0.9 V at 10 mA - not a rated continuous forward condition.

Does the n.c. pin (Pin 2) require PCB routing or grounding?

No - Pin 2 is internally not connected and must remain electrically floating. No PCB trace, pad, or solder mask opening is required for it. The SOT23 footprint accommodates this n.c. pin to maintain mechanical stability and series-wide layout compatibility.

BZX84-C11,235 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):: 11 V

Tolerance:: ±5%

Power - Max:: 250 mW

Impedance (Max) (Zzt):: 20 Ohms

Current - Reverse Leakage @ Vr:: 100 nA @ 8 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-C11,235 FAQ

1.How can I place an order for BZX84-C11,235 through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX84-C11,235 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-C11,235 reliable?

The price and inventory of BZX84-C11,235 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-C11,235 is usually 5 days.

3.What payment methods are accepted for BZX84-C11,235?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-C11,235 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX84-C11,235?

BZX84-C11,235 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX84-C11,235 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-C11,235?

For technical support, including BZX84-C11,235 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-C11,235 requirements.

6.How does Aetrix verify that BZX84-C11,235 is sourced from the original manufacturer or authorized distributors?

All BZX84-C11,235 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-C11,235 meets industry standards.

7.What is the process for return or replacement of BZX84-C11,235?

All BZX84-C11,235 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-C11,235, 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-C11,235 part is unused and in its original packaging.

Return procedure for BZX84-C11,235:

1.Submit a request within 90 days.

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

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