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Nexperia USA Inc. BZT5250H-C33-QX
- Part No.:
- BZT5250H-C33-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT5250H-C33-QX.pdf
- Description:
- DIODE ZENER 33V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:6,054
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Product details
Overview
BZT5250H-C33-Q 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, 830 mW total power dissipation, and AEC-Q101 qualification for automotive use. It serves as a precision voltage reference or low-power regulation element in battery-powered sensor nodes and microcontroller reset circuits.
For engineers reviewing the BZT5250H-C33-Q datasheet, BZT5250H-C33-Q pinout, BZT5250H-C33-Q application, or BZT5250H-C33-Q equivalent, key selection criteria include its 33 V Zener voltage at 50 µA, low leakage optimization for noise-sensitive analog rails, SOD123F thermal resistance (150 K/W junction-to-solder point), and AEC-Q101 qualification status.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified Zener voltage of 31.35 V to 34.65 V at IZ = 50 µA, exhibiting a temperature coefficient of +0.05 mV/K and differential resistance ≤325 Ω at IZ = 5 mA. Its low 50 µA test current enables stable regulation in ultra-low-bias circuits where quiescent current must remain below 100 µA.
The device features intentional minor leakage current rise per AN90031 to improve switching speed and reduce high-frequency noise coupling, making it suitable for clean reference generation in ADC bias networks and LDO feedback paths. Thermal performance is defined with Rth(j-sp) = 150 K/W on FR4 PCB with cathode pad area of 1 cm².
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 31.35 V to 34.65 V at IZ = 50 µA - defines tight regulation window for 33 V rail stabilization |
| Tolerance | ±5 % - supports cost-optimized designs where tighter tolerance is not required |
| Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C - enables operation up to ~125 °C ambient with derating |
| Forward Voltage (VF) | ≤ 0.9 V at IF = 10 mA - ensures minimal forward drop in polarity protection configurations |
| Differential Resistance (rdiff) | ≤ 325 Ω at IZ = 5 mA - determines load regulation error under varying current draw |
| Junction Temperature (Tj) | −55 °C to +150 °C - supports extended-temperature automotive cabin and engine bay placements |
| AEC-Q101 Qualified | Yes - validated for automotive discrete semiconductor stress testing including HTGB, HTRB, and ESD |
Pinout & Package
SOD123F surface-mount plastic package: 2.6 mm × 1.6 mm × 1.1 mm body, flat lead, single-sided copper FR4 mounting, cathode marked by bar.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal; carries reverse current during Zener conduction |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-biased path enabling voltage clamping at VZ |
Key Features
| Feature | Design Value |
|---|---|
| Low-test-current Zener operation | Specified at 50 µA - enables use in micropower systems where bias current must stay below 100 µA |
| Optimized leakage profile | Intentional minor IR rise per AN90031 - reduces switching transients and broadband noise in reference paths |
| AEC-Q101 qualification | Qualified for automotive applications - meets stress tests for high-temp reverse bias, humidity, and ESD robustness |
| Thermal resistance control | Rth(j-sp) = 150 K/W - allows predictable junction temperature rise with solder-point cooling on standard FR4 |
| Small SMD footprint | SOD123F (2.6 × 1.6 mm) - supports high-density PCB layouts without compromising thermal or electrical performance |
Applications
| Automotive Cabin Sensors | Industrial IoT Edge Node |
|---|---|
Use Scenario: Voltage reference for MEMS pressure sensor signal conditioning in HVAC control modules. IC Role / Device Role / Timing Role: Zener diode provides stable 33 V reference for op-amp biasing and ADC input scaling. Use Value: ±5 % tolerance and low 50 µA test current ensure accurate sensor output over temperature while minimizing battery drain in always-on monitoring. |
Use Scenario: Low-power reset supervisor circuit for ARM Cortex-M0+ microcontrollers in wireless sensor transmitters. IC Role / Device Role / Timing Role: Zener sets threshold for external reset IC or comparator-based brown-out detection. Use Value: AEC-Q101 qualification and 150 °C max junction temperature support deployment in unventilated industrial enclosures. |
| Portable Medical Monitor | Smart Meter Power Rail |
Use Scenario: Reference voltage source for analog front-end of ECG signal acquisition in handheld patient monitors. IC Role / Device Role / Timing Role: Provides clean, low-noise 33 V supply for instrumentation amplifier gain-setting resistors. Use Value: Optimized leakage profile minimizes high-frequency noise injection into sensitive biopotential measurement paths. |
Use Scenario: Overvoltage clamp on auxiliary 33 V DC-DC converter output in electricity meter power supply. IC Role / Device Role / Timing Role: Shunts transient surges above 34.65 V to protect metrology ICs and RTC circuitry. Use Value: 830 mW power rating and 40 W non-repetitive surge capability enable reliable protection against line-induced spikes. |
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 nominal, ±5 %, but SOT23 package; higher rdiff (≥500 Ω); no AEC-Q101 qualification | Limited to commercial-temperature consumer electronics; unsuitable for automotive or industrial environments | Select only if board space allows SOT23 and AEC-Q101 compliance is unnecessary |
| MMSZ5252B | 33 V nominal, ±5 %, SOD123 package; Ptot = 500 mW; no intentional leakage optimization or AEC-Q101 rating | Lower power handling limits use in surge-prone or sustained-clamp applications | Choose when cost is primary constraint and thermal/automotive requirements are relaxed |
Compared with BZX84-C33 and MMSZ5252B, BZT5250H-C33-Q delivers superior thermal robustness (830 mW vs. ≤500 mW), automotive qualification, and noise-optimized leakage-making it the only choice for safety-critical or thermally demanding 33 V reference/clamp roles.
Availability
BZT5250H-C33-Q is available at Aetrix Electronics and suitable for automotive cabin sensors, industrial IoT edge nodes, portable medical monitors, and smart meter power rails requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZT5250H-C33-Q 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 essential efficiency technologies, delivering high-performance, high-reliability discrete and logic devices for automotive, industrial, and mobile markets.
The BZT5250H-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for low-current, low-noise voltage regulation in automotive and industrial applications where precision, reliability, and thermal stability are critical.
FAQ
What is the exact Zener voltage range for BZT5250H-C33-Q at 50 µA test current?
The BZT5250H-C33-Q has a guaranteed Zener voltage range of 31.35 V to 34.65 V when measured at IZ = 50 µA and Tj = 25 °C. This ±5 % tolerance is confirmed in Table 8 of the official Nexperia datasheet Rev. 2 (July 2024), and applies to all units within the C-series variant.
Does BZT5250H-C33-Q support reflow soldering, and what is the recommended footprint?
Yes, BZT5250H-C33-Q is qualified for reflow soldering only, using the SOD123F footprint shown in Figure 10: 2.9 mm × 1.6 mm solder land, 1.2 mm × 1.1 mm pad per terminal, with 0.7 mm center-to-center pitch. The datasheet explicitly prohibits wave or hand soldering due to thermal stress risks.
How does the "intentional minor rise of leakage current" benefit circuit design?
This feature-documented in AN90031-reduces minority-carrier storage time and suppresses high-frequency ringing during turn-off, lowering broadband noise injection into adjacent analog circuits. It is especially beneficial in ADC reference buffers and op-amp bias networks where signal integrity is paramount.
Is thermal resistance data provided for PCB mounting conditions?
Yes: Rth(j-sp) = 150 K/W is specified for mounting on FR4 with single-sided copper, tin-plated, and a 1 cm² cathode pad. Rth(j-a) = 330 K/W is given for free-air conditions. Both values are measured per IEC 60747-16 and appear in Table 6 of the datasheet.
BZT5250H-C33-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZT5250H-Q
- Package/Case:
- SOD-123F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 33 V
- Tolerance:
- ±5%
- 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123F
BZT5250H-C33-QX FAQ
1.How can I place an order for BZT5250H-C33-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT5250H-C33-QX 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-C33-QX reliable?
The price and inventory of BZT5250H-C33-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT5250H-C33-QX is usually 5 days.
3.What payment methods are accepted for BZT5250H-C33-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT5250H-C33-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT5250H-C33-QX?
BZT5250H-C33-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT5250H-C33-QX 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-C33-QX?
For technical support, including BZT5250H-C33-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT5250H-C33-QX requirements.
6.How does Aetrix verify that BZT5250H-C33-QX is sourced from the original manufacturer or authorized distributors?
All BZT5250H-C33-QX 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-C33-QX meets industry standards.
7.What is the process for return or replacement of BZT5250H-C33-QX?
All BZT5250H-C33-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT5250H-C33-QX, 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-C33-QX part is unused and in its original packaging.
Return procedure for BZT5250H-C33-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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