My Inquiry
My Account
Nexperia USA Inc. BZX38450-B36X
- Part No.:
- BZX38450-B36X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-B36X.pdf
- Description:
- DIODE ZENER 36V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:4,535
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX38450-B36X from Nexperia is a low-current Zener voltage regulator diode in SOD323 (SC-76) package, designed for precision voltage reference and biasing in ultra-low-power circuits. It delivers a nominal 36 V regulation at 50 µA test current, with ±2 % tolerance, 300 mW total power dissipation, and 350 Ω differential resistance at 5 mA - enabling stable operation in battery-powered sensor nodes and portable instrumentation.
For engineers reviewing the BZX38450-B36X datasheet, BZX38450-B36X pinout, BZX38450-B36X application, or BZX38450-B36X equivalent, key selection criteria include its low 50 µA regulation current, tight ±2 % voltage tolerance, SOD323 footprint compatibility, and specified thermal resistance of 110 K/W to solder point - critical for thermally constrained PCB layouts.
Technical Context
This Zener diode operates in reverse breakdown mode with a nominal working voltage of 36 V, characterized at IZ = 50 µA for low-bias applications. Its temperature coefficient is +0.05 mV/K, indicating minimal drift over ambient temperature range (−55 °C to +150 °C).
The device exhibits 350 Ω differential resistance at 5 mA, 27.3 V Zener voltage minimum and 37.4 V maximum at 5 mA, and 45 pF capacitance at 0 V reverse bias and 1 MHz - supporting stable DC reference generation without high-frequency coupling issues.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 36 V - precise DC reference point for analog signal conditioning and ADC biasing |
| Voltage Tolerance | ±2 % - ensures predictable regulation across production batches without post-calibration |
| Test Current | 50 µA - enables operation from microamp-level bias sources, ideal for energy-harvesting systems |
| Differential Resistance | 350 Ω at 5 mA - defines load regulation error slope under varying current draw |
| Total Power Dissipation | 300 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 PCB |
| Thermal Resistance (j–sp) | 110 K/W - quantifies junction-to-solder-point thermal path efficiency for thermal design margining |
| Reverse Leakage @ 28.8 V | ≤ 0.05 µA - guarantees negligible quiescent current in standby-mode voltage monitoring |
Pinout & Package
Package: SOD323 (SC-76), surface-mount plastic package with 1.3 mm lead pitch, 1.7 mm × 1.25 mm × 0.95 mm body dimensions. Cathode identified by marking bar.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; reverse-biased terminal where Zener breakdown occurs |
| 2 | Anode (A) | Connected to circuit ground or lower-potential rail; completes reverse-bias path |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - reduces system standby current and extends battery life in portable devices |
| Tight voltage tolerance | ±2 % - minimizes variation in reference-dependent functions like threshold detection and DAC calibration |
| Optimized leakage profile | Intentional minor rise per AN90031 - improves switching speed and reduces noise in dynamic bias networks |
| Thermally efficient package | Rth(j–sp) = 110 K/W - supports reliable operation up to 150 °C junction temperature with minimal heatsinking |
Applications
| Portable Gas Sensor Module | IoT Edge Node Power Monitor |
|---|---|
Use Scenario: Low-power electrochemical gas sensor requiring stable 3.3 V rail derived from 36 V supply via resistive divider + Zener clamp. IC Role / Device Role / Timing Role: Zener voltage reference providing fixed 36 V reference point for resistor-divider scaling and overvoltage protection. Use Value: Enables accurate analog front-end gain setting and fault detection at <5 µA quiescent current, extending coin-cell lifetime beyond 5 years. |
Use Scenario: Battery voltage supervisor in NB-IoT tracker using single-cell Li-SOCl₂ (3.6 V) with 36 V backup capacitor bank. IC Role / Device Role / Timing Role: Precision 36 V reference for comparator-based high-voltage alert circuitry. Use Value: Delivers ±0.72 V absolute accuracy over −40 °C to +85 °C, eliminating need for trimming in field-deployed units. |
| Medical Wearable ECG Front-End | Industrial PLC Analog Input Card |
Use Scenario: Biasing of op-amp input stage in ultra-low-noise ECG amplifier powered by CR2032 battery. IC Role / Device Role / Timing Role: Low-noise Zener reference stabilizing common-mode voltage for instrumentation amplifier. Use Value: 45 pF capacitance and optimized leakage reduce high-frequency interference coupling into sub-µV signal path. |
Use Scenario: Reference stabilization in 4–20 mA loop-powered transmitter with 36 V loop supply. IC Role / Device Role / Timing Role: Shunt regulator maintaining stable 36 V node for DAC and isolator biasing under variable load conditions. Use Value: 350 Ω dynamic impedance ensures <10 mV output shift across 0–20 mA loop current swing, meeting IEC 61000-4-5 surge immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-C36 | ±5 % tolerance, higher leakage (0.1 µA @ 28.8 V), same SOD323 package | Suitable for non-critical biasing where cost sensitivity outweighs accuracy | Select when ±5 % regulation tolerance is acceptable and leakage budget allows 2× increase |
| MMSZ5245B | 36 V nominal, ±5 %, 500 mW rating, SOD-123 package (larger footprint) | Higher power handling but incompatible with dense SOD323 layouts | Choose only if board space permits larger package and 200 mW extra dissipation is required |
Compared with BZX38450-B36X, BZX384-C36 trades accuracy for cost in non-precision roles, while MMSZ5245B offers higher power at the expense of PCB area and thermal interface compatibility - making the B36X optimal for space-constrained, accuracy-critical, low-quiescent designs.
Availability
BZX38450-B36X is available at Aetrix Electronics and suitable for portable medical sensors, industrial loop-powered transmitters, IoT edge node power monitors, and wearable ECG front-ends requiring stable component supply with guaranteed long-term continuity.
Supply support for BZX38450-B36X 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 delivering high-performance logic, discrete, and MOSFET solutions with focus on efficiency, reliability, and miniaturization.
The BZX38450 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for battery-powered and space-constrained applications demanding tight voltage tolerance and ultra-low test current operation.
FAQ
What is the maximum continuous reverse voltage this diode can regulate at 36 V nominal?
The BZX38450-B36X maintains regulation between 35.3 V (min) and 36.7 V (max) at 5 mA test current, with absolute maximum reverse voltage limited to 36 V under continuous DC conditions per datasheet Table 8. Exceeding 36 V risks thermal runaway due to power dissipation limits.
Can this Zener be used in AC signal clipping applications?
No - the BZX38450-B36X is characterized and qualified only for DC voltage regulation. Its 45 pF capacitance and lack of specified forward surge capability make it unsuitable for repetitive AC waveform clipping; dedicated transient voltage suppressors or dual-Zener configurations are recommended instead.
How does the 50 µA test current affect circuit design?
The 50 µA test current means the diode achieves its specified 36 V Zener voltage only when biased at that exact current. Designers must ensure series resistance delivers ~50 µA under worst-case supply and temperature conditions - typically requiring 1–10 MΩ resistors for 36 V supplies - to maintain regulation accuracy.
Is this part automotive-qualified?
No - the BZX38450-B36X is not automotive-qualified. Nexperia explicitly states in Section 14 of the datasheet that unless designated "automotive qualified", products are not tested or warranted for automotive use. This part lacks AEC-Q200 stress testing and automotive-grade traceability.
BZX38450-B36X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX38450
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 36 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 27.3 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX38450-B36X FAQ
1.How can I place an order for BZX38450-B36X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-B36X 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 BZX38450-B36X reliable?
The price and inventory of BZX38450-B36X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX38450-B36X is usually 5 days.
3.What payment methods are accepted for BZX38450-B36X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-B36X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-B36X?
BZX38450-B36X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-B36X 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 BZX38450-B36X?
For technical support, including BZX38450-B36X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-B36X requirements.
6.How does Aetrix verify that BZX38450-B36X is sourced from the original manufacturer or authorized distributors?
All BZX38450-B36X 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 BZX38450-B36X meets industry standards.
7.What is the process for return or replacement of BZX38450-B36X?
All BZX38450-B36X units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-B36X, 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 BZX38450-B36X part is unused and in its original packaging.
Return procedure for BZX38450-B36X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-B36X 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…
