My Inquiry
My Account
Nexperia USA Inc. BZT5250H-B33X
- Part No.:
- BZT5250H-B33X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT5250H-B33X.pdf
- Description:
- DIODE ZENER 33V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:7,251
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZT5250H-B33X from Nexperia is a low-current Zener diode in SOD123F package, rated for 33 V nominal Zener voltage at 50 µA test current, with ±5 % tolerance (C-series), 830 mW total power dissipation, and 325 Ω differential resistance at 2 mA. It serves as a precision voltage reference or regulation element in low-bias portable electronics and sensor signal conditioning circuits.
For engineers reviewing the BZT5250H-B33X datasheet, BZT5250H-B33X pinout, BZT5250H-B33X application, or BZT5250H-B33X equivalent, this page delivers verified electrical parameters, thermal behavior, SOD123F mounting details, and real-world use cases for battery-powered and space-constrained designs.
Technical Context
This Zener diode operates in reverse breakdown mode with specified regulation at IZ = 50 µA - enabling ultra-low quiescent current operation ideal for energy-sensitive systems. Its temperature coefficient of +0.05 mV/K at 33 V ensures stable reference performance across -55 °C to +150 °C ambient range.
The device exhibits 25.0 Ω typical differential resistance at 2 mA and 45 pF junction capacitance at 0 V, supporting fast transient response and minimal noise coupling in analog front-ends. Its intentional minor leakage rise (per AN90031) improves switching speed without compromising regulation accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 33 V nominal at IZ = 50 µA; ±5 % tolerance ensures predictable clamping in low-power bias networks |
| Differential Resistance rdiff | 325 Ω max at IZ = 2 mA; defines voltage regulation slope under load variation |
| Total Power Dissipation Ptot | 830 mW at Tamb ≤ 25 °C on 1 cm² cathode pad; sets maximum continuous DC or pulsed power handling |
| Junction-to-Ambient Rth(j-a) | 330 K/W in free air; determines thermal rise under no PCB copper enhancement |
| Reverse Current IR | 0.05 µA max at VR = 25.4 V; confirms sharp knee and low leakage below breakdown |
| Forward Voltage VF | 0.9 V max at IF = 10 mA; enables predictable forward conduction for dual-direction protection schemes |
| Diode Capacitance Cd | 45 pF at f = 1 MHz, VR = 0 V; limits high-frequency signal distortion in RF-coupled references |
Pinout & Package
SOD123F surface-mount plastic package: 2.6 mm × 1.6 mm × 1.1 mm body, flat lead profile optimized for automated reflow assembly and minimal board footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Marked side with bar; connects to regulated output node or reference rail; carries reverse breakdown current |
| 2 | Anode (A) | Unmarked terminal; ties to ground or lower-potential rail; completes Zener bias path |
Key Features
| Feature | Design Value |
|---|---|
| Low-test-current specification | Rated at IZ = 50 µA - enables stable regulation in microamp-level bias circuits without loading sensitive sources |
| Optimized leakage profile | Intentional minor leakage rise per AN90031 - reduces switching time and broadband noise in dynamic reference applications |
| Thermal robustness | 150 °C max junction temperature and -55 °C to +150 °C operating range - supports industrial and automotive-adjacent environments |
| Surface-mount compatibility | SOD123F footprint with standardized reflow solder land pattern - ensures manufacturability in high-density PCB layouts |
| Two tolerance options | ±2 % (B-series) and ±5 % (C-series) - allows cost/performance trade-off selection for reference vs. general-purpose use |
Applications
| Portable Sensor Biasing | USB-C Power Monitoring Reference |
|---|---|
|
Use Scenario: Providing stable 33 V reference for MEMS pressure sensor excitation in battery-powered IoT nodes. IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage reference, replacing higher-current TL431-based solutions to extend battery life. Use Value: 50 µA test current enables >10-year operation on coin-cell batteries while maintaining ±5 % regulation accuracy. |
Use Scenario: Clamping and scaling USB-C PD voltage sense lines for MCU ADC input in compact power adapters. IC Role / Device Role / Timing Role: Precision shunt regulator establishing known upper limit for scaled-down bus voltage monitoring. Use Value: 45 pF capacitance minimizes phase shift in 100 kHz–1 MHz PD communication bands; SOD123F fits tight layout constraints. |
| Industrial PLC Analog Input Protection | Medical Wearable Signal Conditioning |
|
Use Scenario: Overvoltage clamp on 4–20 mA loop receiver inputs exposed to field transients in factory automation. IC Role / Device Role / Timing Role: Fast-response Zener limiting fault energy before TVS activation, reducing system-level surge stress. Use Value: 325 Ω rdiff ensures <100 mV deviation over 0–2 mA fault current range, preserving measurement linearity. |
Use Scenario: Low-noise voltage reference for ECG front-end instrumentation amplifiers in disposable patch monitors. IC Role / Device Role / Timing Role: Stable DC reference source for gain-setting resistors and ADC reference buffers. Use Value: +0.05 mV/K temperature coefficient limits drift to <0.5 mV over 0–50 °C patient-use range, improving diagnostic accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C33 | Same 33 V / ±5 % rating but SOT23 package; 500 mW Ptot; higher rdiff (700 Ω) | Requires larger PCB area; less suitable for ultra-low-current bias due to higher leakage at sub-µA levels | Select when existing SOT23 footprint reuse is prioritized over power efficiency |
| MMSZ5257ET1G | 33 V / ±5 % in SOD123; 500 mW Ptot; rdiff = 40 Ω at 20 mA (not at 50 µA) | Optimized for higher-current regulation; lacks low-IZ characterization and intentional leakage tuning | Select only if design operates above 1 mA and requires tighter rdiff at high bias |
Compared with BZX84-C33 and MMSZ5257ET1G, BZT5250H-B33X uniquely combines SOD123F miniaturization, 50 µA test-point specification, and AN90031-optimized leakage for battery-critical and noise-sensitive analog systems - making it irreplaceable where microamp-level stability and fast transient response are mandatory.
Availability
BZT5250H-B33X is available at Aetrix Electronics and suitable for portable sensor biasing, USB-C power monitoring, and industrial analog input protection requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.
Supply support for BZT5250H-B33X 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 logic, discrete, and MOSFET solutions, serving automotive, industrial, and consumer markets with ISO/TS 16949-certified manufacturing.
The BZT5250H series belongs to Nexperia's low-current Zener portfolio, engineered specifically for energy-efficient voltage reference and regulation in battery-powered and space-constrained electronics - emphasizing ultra-low test current, thermal resilience, and SMD manufacturability.
FAQ
What is the exact Zener voltage tolerance for BZT5250H-B33X?
BZT5250H-B33X uses the 'C' suffix, indicating ±5 % tolerance. Its guaranteed Zener voltage range is 31.35 V to 34.65 V at IZ = 50 µA and Tj = 25 °C, as confirmed in Table 8 of the official Nexperia datasheet Rev. 1 (2024).
Can BZT5250H-B33X be used in place of a 33 V TL431 shunt regulator?
No - BZT5250H-B33X is a passive two-terminal Zener diode, lacking the active feedback, adjustable output, and 2.5 V reference of TL431. It can replace TL431 only in fixed-voltage, low-current shunt roles where 33 V regulation at ~50 µA is sufficient and no cathode current control is needed.
What is the maximum continuous reverse current before thermal runaway?
At Tamb = 25 °C with 1 cm² cathode pad, the absolute maximum reverse current is limited by Ptot = 830 mW. For VZ ≈ 33 V, this yields IZ(max) ≈ 25.2 mA. Exceeding this continuously risks exceeding 150 °C junction temperature and permanent degradation.
Does the 'X' suffix in BZT5250H-B33X indicate tape-and-reel packaging?
Yes - the 'X' suffix denotes standard 3000-piece 8 mm tape-and-reel packaging per Nexperia ordering convention. This matches the SOD123F package type and is compatible with pick-and-place equipment using EIA-481-D compliant feeders.
BZT5250H-B33X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZT5250H
- Package/Case:
- SOD-123F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 33 V
- Tolerance:
- ±2%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 25 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-123F
BZT5250H-B33X FAQ
1.How can I place an order for BZT5250H-B33X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT5250H-B33X 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 BZT5250H-B33X reliable?
The price and inventory of BZT5250H-B33X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT5250H-B33X is usually 5 days.
3.What payment methods are accepted for BZT5250H-B33X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT5250H-B33X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT5250H-B33X?
BZT5250H-B33X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT5250H-B33X 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 BZT5250H-B33X?
For technical support, including BZT5250H-B33X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT5250H-B33X requirements.
6.How does Aetrix verify that BZT5250H-B33X is sourced from the original manufacturer or authorized distributors?
All BZT5250H-B33X 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 BZT5250H-B33X meets industry standards.
7.What is the process for return or replacement of BZT5250H-B33X?
All BZT5250H-B33X units undergo pre-shipment inspection (PSI). If there is an issue with BZT5250H-B33X, 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 BZT5250H-B33X part is unused and in its original packaging.
Return procedure for BZT5250H-B33X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZT5250H-B33X 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…
