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Nexperia USA Inc. BZT5250H-C33X
- Part No.:
- BZT5250H-C33X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT5250H-C33X.pdf
- Description:
- DIODE ZENER 33V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:8,246
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Product details
Overview
BZT5250H-C33X from Nexperia is a low-current Zener diode in SOD123F package, providing precise 33 V regulation at 50 µA test current with ±5 % tolerance, 325 Ω differential resistance at 5 mA, and 0.05 µA reverse leakage at rated voltage - used for voltage reference and biasing in portable battery-powered sensor nodes and low-power microcontroller reset circuits.
For engineers reviewing the BZT5250H-C33X datasheet, BZT5250H-C33X pinout, BZT5250H-C33X application, or BZT5250H-C33X equivalent, this page delivers verified electrical characteristics, thermal performance data, SOD123F footprint details, and validated alternative Zeners for low-bias voltage reference design.
Technical Context
This Zener operates in reverse breakdown mode with a nominal working voltage of 33 V (min 31.35 V, max 34.65 V at Tj = 25 °C), specified at low test current (50 µA) to minimize power draw in standby circuits. Its intentional minor rise in leakage current improves switching speed and reduces noise per AN90031.
Thermal resistance from junction to solder point is 70 K/W, enabling stable operation up to 150 °C junction temperature. The device supports non-repetitive peak reverse power dissipation of 40 W for 100 µs pulses, while continuous total power dissipation is rated at 830 mW on a 1 cm² cathode pad.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 33 V nominal (31.35–34.65 V range); enables accurate 3.3 V rail derivation via resistor divider in low-power MCU systems |
| Tolerance | ±5 %; matches standard E24 voltage series for cost-optimized BOM selection without tight-tolerance premium |
| Differential Resistance rdiff | 325 Ω at IZ = 5 mA; ensures stable regulation under small load variations in reference circuits |
| Reverse Current IR | 0.05 µA at VR = 33 V; minimizes quiescent current drain in battery-critical applications |
| Forward Voltage VF | 0.9 V at IF = 10 mA; defines forward conduction threshold for polarity-sensitive protection configurations |
| Total Power Dissipation | 830 mW at Tamb ≤ 25 °C with 1 cm² cathode pad; sets maximum continuous bias resistor power limit |
| Junction Temperature | 150 °C max; allows operation in industrial ambient environments without derating below 85 °C ambient |
Pinout & Package
SOD123F surface-mount plastic package: 2.6 mm × 1.6 mm × 1.1 mm body, flat lead profile optimized for automated placement and reflow soldering. Cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms reverse-biased junction for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Low-test-current specification | Rated at 50 µA - reduces standby current in always-on sensor nodes and RTC backup circuits |
| Optimized leakage profile | Intentional minor IR rise per AN90031 - improves transient response and lowers broadband noise in analog references |
| Small-form-factor SMD | SOD123F footprint - saves board space vs. DO-35 or SOD-123, compatible with high-density PCB layouts |
| Two tolerance options | ±2 % (B-series) and ±5 % (C-series) - enables cost/performance trade-off without redesign |
| Thermal robustness | Rth(j-sp) = 70 K/W - supports reliable operation with minimal copper area, reducing layout complexity |
Applications
| Portable Sensor Node Reference | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Providing stable 33 V reference for ADC input scaling in battery-powered environmental sensors. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown as precision voltage reference source. Use Value: 0.05 µA reverse leakage preserves multi-year battery life; ±5 % tolerance meets 12-bit ADC full-scale accuracy requirements. | Use Scenario: Generating clean reset signal for ARM Cortex-M0+ microcontrollers during brown-out conditions. IC Role / Device Role / Timing Role: Voltage-clamping element in RC-based reset generator network. Use Value: 325 Ω dynamic impedance ensures predictable timing delay across temperature; low VF prevents false triggering during power-up. |
| Low-Power IoT Transceiver Bias | Industrial Signal Conditioning |
Use Scenario: Supplying bias voltage to RF front-end LNA in sub-GHz LoRaWAN modules. IC Role / Device Role / Timing Role: Low-current Zener regulator stabilizing gate voltage of discrete GaAs FET amplifier. Use Value: 50 µA test current aligns with nanoampere sleep modes; SOD123F size fits constrained RF shielded zones. | Use Scenario: Setting reference level for 4–20 mA loop transmitter DAC output stage. IC Role / Device Role / Timing Role: Precision shunt regulator establishing feedback node voltage in op-amp current sink. Use Value: 150 °C max junction temperature supports operation in sealed enclosures; 830 mW rating handles transient overvoltage events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584-C33 | Same 33 V nominal, ±5 %, but in SOD323 package; higher rdiff (500 Ω) and lower Ptot (300 mW) | Less suitable for higher-current reference loads; better for ultra-compact layouts where SOD123F is too large | Select when board space is more critical than regulation stability under load variation |
| MMSZ5257ET1G | 33 V nominal, ±5 %, SOD123 package; rdiff = 35 Ω at 20 mA but requires 20× higher test current (1 mA) | Higher bias current incompatible with nanoampere standby designs; superior regulation for active-mode circuits | Select only if system can sustain ≥1 mA continuous Zener current and demands tighter dynamic regulation |
Compared with BZT5250H-C33X, BZX584-C33 trades regulation stability for smaller footprint, while MMSZ5257ET1G delivers lower impedance only at significantly higher bias current - making BZT5250H-C33X optimal for true low-power, low-leakage reference use cases.
Availability
BZT5250H-C33X is available at Aetrix Electronics and suitable for portable sensor nodes, microcontroller reset circuits, low-power IoT transceiver bias, and industrial signal conditioning requiring stable component supply with consistent parametric performance across production lots.
Supply support for BZT5250H-C33X 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 leading semiconductor manufacturer headquartered in Nijmegen, Netherlands, specializing in high-volume logic, analog, discrete, and MOSFET solutions with emphasis on reliability and energy efficiency.
The BZT5250H series belongs to Nexperia's general-purpose Zener diode product line, designed specifically for low-current voltage regulation in battery-powered and space-constrained applications where minimal leakage and stable low-bias operation are essential.
FAQ
What is the maximum continuous power dissipation for BZT5250H-C33X at 70 °C ambient?
At 70 °C ambient, BZT5250H-C33X must be derated linearly from its 830 mW rating at 25 °C using the 150 °C max junction temperature limit. With Rth(j-a) = 330 K/W, the allowable power drops to approximately 610 mW - calculated as (150 − 70) °C ÷ 330 K/W = 0.242 W.
Does BZT5250H-C33X support bidirectional ESD protection?
No - BZT5250H-C33X is a unidirectional Zener diode optimized for reverse-bias voltage regulation. It lacks symmetric clamping characteristics and is not rated for IEC 61000-4-2 ESD protection. Use dedicated TVS diodes like PESD5V0S1BA for bidirectional surge suppression.
Can BZT5250H-C33X replace BZT5250H-B33 in existing designs?
Yes, with functional trade-offs: BZT5250H-C33 has ±5 % tolerance versus BZT5250H-B33's ±2 %, and slightly higher leakage (0.05 µA vs. 0.05 µA typical but unspecified min). Both share identical SOD123F package, pinout, and thermal specs - suitable for drop-in replacement where tighter tolerance is not required.
What is the recommended PCB footprint for reflow soldering of BZT5250H-C33X?
The official Nexperia reflow footprint specifies 2.8 mm × 1.2 mm solder lands (2×), 4.4 mm × 2.1 mm occupied area, and 2.9 mm × 1.6 mm solder resist opening. Reflow is the only qualified process - wave soldering is not recommended due to thermal stress on the SOD123F molded body.
BZT5250H-C33X 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:
- ±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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123F
BZT5250H-C33X FAQ
1.How can I place an order for BZT5250H-C33X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT5250H-C33X 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-C33X reliable?
The price and inventory of BZT5250H-C33X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT5250H-C33X is usually 5 days.
3.What payment methods are accepted for BZT5250H-C33X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT5250H-C33X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT5250H-C33X?
BZT5250H-C33X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT5250H-C33X 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-C33X?
For technical support, including BZT5250H-C33X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT5250H-C33X requirements.
6.How does Aetrix verify that BZT5250H-C33X is sourced from the original manufacturer or authorized distributors?
All BZT5250H-C33X 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-C33X meets industry standards.
7.What is the process for return or replacement of BZT5250H-C33X?
All BZT5250H-C33X units undergo pre-shipment inspection (PSI). If there is an issue with BZT5250H-C33X, 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-C33X part is unused and in its original packaging.
Return procedure for BZT5250H-C33X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZT5250H-C33X Tags
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