My Inquiry
My Account
Nexperia USA Inc. BZX84-B11,235
- Part No.:
- BZX84-B11,235
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84-B11,235.pdf
- Description:
- DIODE ZENER 11V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,936
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX84-B11,235 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 clamping in sensor signal conditioning circuits.
For engineers reviewing the BZX84-B11,235 datasheet, BZX84-B11,235 pinout, BZX84-B11,235 application, or BZX84-B11,235 equivalent, key selection criteria include Zener voltage tolerance (±2 %), differential resistance (≤150 Ω at IZ = 5 mA), non-repetitive peak reverse power (40 W), thermal resistance (330 K/W to solder point), and SOT23 footprint compatibility with automated PCB assembly.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain stable voltage across its terminals under varying load or supply conditions. Its regulation accuracy relies on tight ±2 % VZ tolerance at IZ = 5 mA and low dynamic impedance (≤150 Ω), enabling reliable reference generation in low-current analog subsystems.
Designed for surface-mount use on FR4 PCBs with single-sided copper, it features a 330 K/W junction-to-solder-point thermal resistance and supports non-repetitive surge handling up to 40 W for 100 μs pulses - critical for transient suppression in power-rail monitoring applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VZ (Nominal) | 11 V at IZ = 5 mA - defines precise regulation point for feedback or reference circuits |
| Tolerance | ±2 % - ensures predictable voltage deviation across production lots and temperature range |
| Ptot | 250 mW at Tamb ≤ 25 °C - sets continuous DC power limit for thermal design on standard PCB |
| rdif | ≤150 Ω at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| IR @ VR = 8.8 V | ≤20 μA - guarantees low leakage current below breakdown, minimizing standby power loss |
| Tj max | 150 °C - defines absolute thermal ceiling for reliability under worst-case ambient and power conditions |
| Rth(j-sp) | 330 K/W - enables accurate junction temperature estimation from solder point temperature measurement |
Pinout & Package
Package: SOT23 (TO-236AB), 3-lead surface-mount plastic package with standard footprint per Figure 12 (reflow) and Figure 13 (wave soldering); dimensions 2.9 × 1.3 × 1.0 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connected to lower-potential node; reverse bias applied between cathode and anode to activate Zener conduction |
| 2 | Not Connected (n.c.) | Internal die bond wire stub; electrically isolated - must remain unconnected on PCB layout |
| 3 | Cathode (K) | Connected to higher-potential node; carries reverse current during regulation; primary thermal path to PCB via solder joint |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMT package | SOT23 footprint compatible with high-density PCB layouts and standard pick-and-place equipment |
| Stable Zener voltage | 11 V ±2 % at 5 mA ensures consistent reference accuracy without trimming in production |
| Controlled dynamic impedance | ≤150 Ω differential resistance minimizes output voltage shift under load current variation |
| Transient surge capability | 40 W non-repetitive peak reverse power supports ESD and line-transient protection functions |
| Thermal performance | 330 K/W junction-to-solder-point resistance allows effective heat transfer to PCB copper pour |
Applications
| Power Supply Monitoring | Sensor Signal Conditioning |
|---|---|
Use Scenario: Monitoring 12 V rail in industrial PLC I/O modules to detect undervoltage or overvoltage faults. IC Role / Device Role / Timing Role: Zener diode provides fixed 11 V reference for comparator input, triggering fault flag when rail deviates beyond threshold. Use Value: ±2 % VZ tolerance ensures detection window aligns precisely with system specification without calibration. |
Use Scenario: Biasing and level-shifting analog outputs from MEMS pressure sensors operating from 3.3 V supplies. IC Role / Device Role / Timing Role: Acts as shunt regulator to generate stable 11 V intermediate reference for op-amp gain stages and ADC driver circuits. Use Value: Low 20 μA reverse leakage at 8.8 V prevents loading of high-impedance sensor outputs. |
| Overvoltage Clamping | Microcontroller Reset Circuit |
Use Scenario: Protecting UART lines against induced transients in factory automation wiring harnesses. IC Role / Device Role / Timing Role: Placed between signal line and ground to clamp spikes above 11 V, diverting surge current away from IC pins. Use Value: 40 W non-repetitive peak power rating absorbs 100 μs surges without degradation. |
Use Scenario: Generating clean reset pulse for ARM Cortex-M0+ microcontrollers during power-up sequencing. IC Role / Device Role / Timing Role: Provides regulated 11 V to RC timing network that delays reset deassertion until supply stabilizes. Use Value: 250 mW power rating supports sustained operation during extended brown-out conditions. |
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 MMBZ5240B | 10 V nominal, ±5 % tolerance, 350 mW Ptot, SOT23 package | Lower regulation voltage and wider tolerance; higher power rating suits higher-current shunt use | Select when 10 V reference suffices and tighter tolerance is not required; verify thermal margin at 350 mW |
| Vishay BZX84-C11 | 11 V nominal, ±5 % tolerance, same SOT23 package and 250 mW rating | Relaxed tolerance increases VZ spread (10.4–11.6 V), reducing precision in reference-critical designs | Acceptable for non-critical clamping where cost is prioritized over voltage accuracy |
Compared with BZX84-B11,235, MMBZ5240B offers higher power but looser voltage control, while BZX84-C11 matches voltage and package but sacrifices regulation precision - making the BZX84-B11,235 optimal for applications demanding both 11 V accuracy and SOT23 manufacturability.
Availability
BZX84-B11,235 is available at Aetrix Electronics and suitable for industrial sensor interfaces, power supply supervision, overvoltage protection circuits, and microcontroller reset networks requiring stable component supply and full traceability.
Supply support for BZX84-B11,235 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 specifically for low-power voltage reference and clamping in space-constrained, thermally sensitive applications such as portable instrumentation and IoT edge nodes.
FAQ
What is the maximum continuous forward current for BZX84-B11,235?
The device is not intended for continuous forward conduction; its absolute maximum forward current is 200 mA per limiting values table, but typical operation occurs in reverse breakdown. Forward voltage is specified at 10 mA (≤0.9 V), and sustained forward bias risks thermal runaway due to lack of current-limiting structure.
Can BZX84-B11,235 be used in place of a 12 V Zener diode?
No - its nominal Zener voltage is 11 V with ±2 % tolerance (10.8–11.2 V range), not 12 V. Substituting it for a 12 V part would cause undershoot in regulation or clamping thresholds, potentially leading to incorrect system behavior or insufficient overvoltage protection.
How does the n.c. pin affect PCB layout and thermal design?
Pin 2 is internally unconnected and must remain unbonded on the PCB. It introduces no electrical function but occupies physical space; layout must avoid routing traces or placing copper under it to prevent unintended coupling or solder bridging. Thermal design focuses solely on pins 1 (anode) and 3 (cathode), especially the cathode's solder joint as the primary heat path.
Is BZX84-B11,235 qualified for automotive applications?
No - this variant is non-automotive qualified per Revision History section 13, which states "Products changed to non-automotive qualification" in Rev. 7. Automotive alternatives are designated with '-Q' suffix (e.g., BZX84-B11,215-Q) and undergo additional AEC-Q101 stress testing and PPAP documentation.
BZX84-B11,235 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:
- ±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-B11,235 FAQ
1.How can I place an order for BZX84-B11,235 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84-B11,235 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-B11,235 reliable?
The price and inventory of BZX84-B11,235 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-B11,235 is usually 5 days.
3.What payment methods are accepted for BZX84-B11,235?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-B11,235 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84-B11,235?
BZX84-B11,235 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84-B11,235 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-B11,235?
For technical support, including BZX84-B11,235 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-B11,235 requirements.
6.How does Aetrix verify that BZX84-B11,235 is sourced from the original manufacturer or authorized distributors?
All BZX84-B11,235 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-B11,235 meets industry standards.
7.What is the process for return or replacement of BZX84-B11,235?
All BZX84-B11,235 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-B11,235, 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-B11,235 part is unused and in its original packaging.
Return procedure for BZX84-B11,235:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84-B11,235 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
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.
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…
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…
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…
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 …
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…
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…
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…
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…
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…
