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

Nexperia USA Inc. BZX84-B11,215

Name: BZX84-B11,215
Brand: Nexperia USA Inc.
SKU: BZX84-B11,215
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX84-B11,215

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: BZX84-B11,215.pdf

Description:: DIODE ZENER 11V 250MW TO236AB

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Product details

Overview

BZX84-B11,215 from Nexperia is a ±2 % 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 power supply feedback loops and sensor biasing circuits.

For engineers reviewing the BZX84-B11,215 datasheet, BZX84-B11,215 pinout, BZX84-B11,215 application, or BZX84-B11,215 equivalent, key selection criteria include Zener voltage tolerance (±2 %), differential resistance (≤150 Ω at I_Z = 5 mA), reverse current (≤0.1 μA at V_R = 8.8 V), temperature coefficient (+5.4 to +9.0 mV/K), and thermal resistance (330 K/W junction-to-solder point).

Technical Context

This device operates as a two-terminal shunt voltage regulator, maintaining stable output voltage across a load by conducting reverse current when input exceeds its 11 V Zener threshold. Its ±2 % tolerance (B-series) ensures tighter regulation than ±5 % C-series variants while retaining cost-effective SOT23 packaging.

Designed for low-current (<200 mA forward, ≤40 W non-repetitive surge) applications, it features a 150 Ω typical differential resistance at 5 mA, 0.9 V max forward voltage at 10 mA, and thermal resistance of 330 K/W from junction to solder point - enabling reliable operation on standard FR4 PCBs with single-sided copper.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	10.80 V to 11.20 V at I_Z = 5 mA - defines regulated output voltage range under nominal test conditions
Tolerance	±2 % - guarantees voltage stability within 220 mV of 11 V, critical for reference accuracy in feedback networks
Differential Resistance (r_dif)	≤150 Ω at I_Z = 5 mA - determines regulation stiffness; lower value improves load/line transient response
Total Power Dissipation (P_tot)	250 mW at T_amb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 PCB
Reverse Current (I_R)	≤0.1 μA at V_R = 8.8 V - ensures minimal leakage below regulation threshold, preserving efficiency in standby
Temperature Coefficient (S_Z)	+5.4 to +9.0 mV/K at I_Z = 5 mA - quantifies voltage drift per degree Celsius, essential for thermal stability in wide-temp environments
Junction Temperature (T_j)	−55 °C to +150 °C - specifies operational thermal envelope for industrial and automotive-adjacent use cases

Pinout & Package

Package: SOT23 (TO-236AB), surface-mount plastic package with 3 leads, 1.9 mm × 1.1 mm footprint, 0.45 mm nominal thickness, and tin-plated terminations compatible with reflow and wave soldering per IPC-7095.

Pin/Terminal	Circuit Role	Design Meaning
1	Anode (A)	Forward-biased terminal; connects to lower-potential node in Zener configuration (e.g., ground or return path)
2	Not Connected (n.c.)	Internally unconnected lead; must remain floating - no PCB trace or component connection permitted
3	Cathode (K)	Reverse-biased terminal; connects to higher-potential node (e.g., input rail or feedback divider top) to enable Zener conduction

Key Features

Feature	Design Value
Low-power Zener regulation	250 mW P_tot enables compact placement in space-constrained DC-DC feedback paths without heatsinking
±2 % voltage tolerance	Meets tight reference requirements for 12 V rail monitoring and analog sensor excitation where ±1 % is unnecessary but ±5 % is insufficient
Non-repetitive surge capability	40 W peak reverse power (100 μs pulse) provides transient overvoltage clamping for ESD and inductive kick suppression
SOT23 package compatibility	Standard footprint aligns with IPC-7095 reflow profiles and supports automated pick-and-place at >10,000 units/hour
Wide operating temperature	−55 °C to +150 °C junction range supports deployment in industrial motor drives and outdoor IoT nodes

Applications

Power Supply Feedback

Sensor Bias Reference

Use Scenario: Stabilizing output voltage of a 12 V switching regulator via TL431-compatible feedback divider.

IC Role / Device Role / Timing Role: Shunt reference providing precise 11 V threshold to set feedback node voltage.

Use Value: Enables ±1 % output regulation accuracy without external op-amp compensation, reducing BOM count by one active component.

Use Scenario: Supplying stable excitation voltage to a resistive temperature detector (RTD) bridge in HVAC control.

IC Role / Device Role / Timing Role: Low-drift voltage reference sourcing <100 μA to maintain bridge balance under thermal cycling.

Use Value: Limits RTD measurement error to <0.2 °C over −40 °C to +85 °C ambient due to +5.4 to +9.0 mV/K S_Z.

Overvoltage Clamp

Logic-Level Protection

Use Scenario: Protecting microcontroller GPIO pins from 15 V transients induced by relay coil de-energization.

IC Role / Device Role / Timing Role: Fast-acting shunt clamp diverting surge current away from sensitive inputs during 100 μs events.

Use Value: Absorbs up to 40 W peak power (per IEC 61000-4-5 Level 3) without degradation, extending MCU lifetime beyond 100,000 cycles.

Use Scenario: Level-shifting 5 V logic signals to interface with 3.3 V FPGA I/O banks requiring 11 V rail supervision.

IC Role / Device Role / Timing Role: Undervoltage lockout (UVLO) reference triggering reset assertion when 12 V supply drops below 10.8 V.

Use Value: Guarantees deterministic FPGA reset with 220 mV hysteresis margin, eliminating metastability during brownout recovery.

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 MMBZ5240BS	10 V nominal, ±5 % tolerance, 350 mW P_tot, 170 Ω r_dif	Looser voltage accuracy but higher power rating; suitable for less critical biasing where cost is primary	Select when ±5 % tolerance is acceptable and 350 mW headroom is needed for higher-current clamping
Vishay BZX84-C11	11 V nominal, ±5 % tolerance, 250 mW P_tot, 150 Ω r_dif, higher IR (≤1 μA at 8.8 V)	Same package and power, but wider tolerance and 10× higher leakage compromises low-power standby performance	Choose only for cost-sensitive consumer applications where 11 V ±0.55 V variation is tolerable

Compared with BZX84-B11,215, MMBZ5240BS trades voltage precision for higher surge robustness, while BZX84-C11 retains identical form factor but sacrifices regulation accuracy and leakage performance - making the B-series optimal for industrial feedback and sensing where ±2 % and sub-0.1 μA IR are design-critical.

Availability

BZX84-B11,215 is available at Aetrix Electronics and suitable for power supply feedback networks, sensor bias references, overvoltage clamps, and logic-level protection circuits requiring stable component supply with full traceability and lifecycle continuity.

Supply support for BZX84-B11,215 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 focused on high-volume, high-reliability discrete and logic devices, with manufacturing rooted in process technology leadership and automotive-grade quality systems.

The BZX84 series belongs to Nexperia's precision Zener regulator product line, engineered specifically for cost-sensitive, space-constrained applications demanding stable voltage references in consumer, industrial, and computing power management subsystems.

FAQ

What is the maximum continuous reverse current this diode can sustain at 11 V?

The BZX84-B11,215 does not specify a maximum continuous reverse current; instead, its regulation behavior is defined at test current I_Z = 5 mA. Continuous operation above 5 mA is limited by thermal constraints - at 25 °C ambient, power dissipation must stay ≤250 mW, permitting up to ~22.7 mA at exactly 11 V before exceeding P_tot. Derating applies above 25 °C per R_th(j-a) = 500 K/W.

Can Pin 2 be grounded or left unconnected on the PCB?

Pin 2 is internally not connected (n.c.) and must remain electrically floating - neither grounded nor tied to any net. Connecting it risks internal shorting or parametric shift. The SOT23 footprint accommodates this via an isolated pad or omitted copper, as shown in Nexperia's Fig. 12 and Fig. 13 solder land layouts.

How does the +5.4 to +9.0 mV/K temperature coefficient affect long-term voltage stability?

This positive temperature coefficient means V_Z increases linearly with junction temperature - e.g., a 50 °C rise from 25 °C to 75 °C adds 270–450 mV to the 11 V nominal, resulting in 11.27–11.45 V regulation. For applications requiring <10 mV drift, active compensation or derating to lower I_Z is necessary.

Is this part qualified for automotive applications?

No. Per Nexperia's Rev. 7 datasheet Section 13 and Legal Information, BZX84-B11,215 is explicitly non-automotive qualified. It lacks AEC-Q101 stress testing and automotive-specific reliability validation. For automotive use, Nexperia offers separate -Q qualified variants (e.g., BZX84-B11,215-Q), which must be specified separately.

BZX84-B11,215 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):: 11 V

Tolerance:: ±2%

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-B11,215 FAQ

1.How can I place an order for BZX84-B11,215 through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX84-B11,215 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-B11,215 reliable?

The price and inventory of BZX84-B11,215 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-B11,215 is usually 5 days.

3.What payment methods are accepted for BZX84-B11,215?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-B11,215 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX84-B11,215?

BZX84-B11,215 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX84-B11,215 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-B11,215?

For technical support, including BZX84-B11,215 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-B11,215 requirements.

6.How does Aetrix verify that BZX84-B11,215 is sourced from the original manufacturer or authorized distributors?

All BZX84-B11,215 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-B11,215 meets industry standards.

7.What is the process for return or replacement of BZX84-B11,215?

All BZX84-B11,215 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-B11,215, 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-B11,215 part is unused and in its original packaging.

Return procedure for BZX84-B11,215:

1.Submit a request within 90 days.

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

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