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Nexperia USA Inc. BZX8450-B30R
- Part No.:
- BZX8450-B30R
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-B30R.pdf
- Description:
- DIODE ZENER 30V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,801
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Product details
Overview
BZX8450-B30R from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, designed for precision biasing and voltage reference in portable electronics. It delivers a nominal 30 V regulation at 50 µA test current, with ±2 % tolerance, 250 mW total power dissipation, and 300 Ω typical differential resistance at 5 mA. It is used in battery-powered sensor signal conditioning circuits where low quiescent current and stable reference are critical.
For engineers reviewing the BZX8450-B30R datasheet, BZX8450-B30R pinout, BZX8450-B30R application, or BZX8450-B30R equivalent, key selection criteria include its 30 V nominal Zener voltage, ±2 % tolerance, SOT23-3 package footprint, 50 µA regulation test current, and intentional leakage optimization for noise-sensitive analog front-ends.
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining a stable 30 V output across its cathode–anode terminals when reverse-biased above its breakdown threshold. Its specified regulation at 50 µA enables ultra-low-power biasing in standby or sleep-mode circuitry.
The BZX8450-B30R features a temperature coefficient of +24.4 mV/K (typical), low 50 pF junction capacitance at 0 V, and a maximum reverse current of 0.05 µA at VR = 29.4 V - enabling high-impedance node stabilization without loading sensitive sources.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 29.4 V to 30.6 V at IZ = 50 µA - ensures tight 30 V reference under minimal bias current |
| Tolerance | ±2 % - supports precision analog reference design without post-calibration trimming |
| Differential Resistance (rdiff) | 300 Ω max at IZ = 5 mA - limits regulation error under small load variations |
| Power Dissipation (Ptot) | 250 mW at Tamb ≤ 25 °C - defines safe continuous operation on standard FR4 PCB |
| Forward Voltage (VF) | 0.9 V max at IF = 10 mA - enables use as low-drop rectifier or clamp in dual-role circuits |
| Junction-to-Ambient Rth | 500 K/W - determines thermal rise under 250 mW load; requires minimal copper area for thermal management |
Pinout & Package
SOT23-3 plastic surface-mount package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm lead pitch, tin-plated terminations compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode) | Anode connection | Connects to lower-potential node; reverse-bias polarity required for Zener operation |
| 2 (n.c.) | Not connected | Internally unconnected terminal; must remain floating - no PCB trace or solder mask relief needed |
| 3 (Cathode) | Cathode connection | Connects to regulated voltage rail; carries full Zener current during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low test current regulation | Specified at 50 µA - enables direct use in microamp-level bias networks without external amplification |
| Optimized leakage profile | Intentional minor leakage rise per AN90031 - reduces switching noise in ADC reference buffers and op-amp feedback paths |
| Stable temperature coefficient | +24.4 mV/K (typical) - predictable drift behavior simplifies compensation in wide-temperature industrial sensors |
| Low junction capacitance | 50 pF at 0 V - minimizes high-frequency loading on oscillator nodes and RF detector outputs |
Applications
| Portable Sensor Biasing | ADC Reference Stabilization |
|---|---|
Use Scenario: Low-power environmental sensor node powered by coin cell, requiring stable analog front-end bias over 10-year shelf life. IC Role / Device Role / Timing Role: Zener shunt regulator providing fixed 30 V reference for op-amp gain-setting and sensor excitation. Use Value: 50 µA regulation current draws <1 µA average from battery during sleep mode, extending operational lifetime beyond 8 years. |
Use Scenario: 16-bit SAR ADC in handheld test equipment where reference stability directly impacts measurement repeatability. IC Role / Device Role / Timing Role: Precision voltage reference source for internal ADC reference buffer, replacing higher-power bandgap ICs. Use Value: ±2 % tolerance and 300 Ω rdiff limit reference error to <0.5 LSB across 0–70 °C ambient range. |
| Low-Noise Op-Amp Feedback | Overvoltage Clamp Protection |
Use Scenario: High-gain instrumentation amplifier stage in medical ECG front-end, sensitive to supply ripple and reference noise. IC Role / Device Role / Timing Role: Zener-based reference node stabilizer in op-amp non-inverting input bias network. Use Value: Optimized leakage profile per AN90031 suppresses 1/f noise contribution, improving SNR by 4.2 dB in 0.5–100 Hz band. |
Use Scenario: Input protection circuit for 24 V industrial PLC analog input channel exposed to transient surges. IC Role / Device Role / Timing Role: Shunt clamp limiting voltage to 30.6 V during overvoltage events, protecting downstream ADC driver. Use Value: 250 mW Ptot rating allows 8.2 mA clamping current for 100 ms transients without thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5262B (ON Semiconductor) | 30 V nominal, ±5 % tolerance, 225 mW Ptot, 300 Ω rdiff at 20 mA | Higher test current (20 mA) increases quiescent power; less suitable for sub-100 µA systems | Select when cost sensitivity outweighs precision and ultra-low bias requirements |
| BZX84-C30 (Nexperia) | Same 30 V nominal, but ±5 % tolerance, higher leakage (0.1 µA), +25.3 mV/K TC | Looser tolerance and higher leakage reduce accuracy in precision references | Select only for non-critical regulation where tighter tolerance is unnecessary |
Compared with MMBZ5262B and BZX84-C30, the BZX8450-B30R provides superior voltage accuracy (±2 % vs ±5 %), lower regulation current (50 µA vs 20 mA or 5 mA), and optimized leakage for noise-sensitive analog nodes - making it the preferred choice for battery-constrained, high-fidelity signal chains.
Availability
BZX8450-B30R is available at Aetrix Electronics and suitable for portable sensor biasing, ADC reference stabilization, and low-noise op-amp feedback circuits requiring stable component supply with guaranteed long-term continuity.
Supply support for BZX8450-B30R 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-performance, energy-efficient logic, discrete, and MOSFET devices for consumer, industrial, and automotive markets.
The BZX8450 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for ultra-low-power voltage reference and biasing in battery-operated and noise-critical analog systems.
FAQ
What is the maximum reverse voltage before breakdown for BZX8450-B30R?
The BZX8450-B30R exhibits a nominal Zener voltage of 30 V, with a guaranteed breakdown range of 29.4 V to 30.6 V at 50 µA test current. It does not conduct significantly below 29.4 V - reverse leakage remains ≤0.05 µA at 29.4 V, confirming sharp knee behavior essential for reliable regulation.
Can BZX8450-B30R be used in forward conduction mode?
Yes - its forward voltage is rated at ≤0.9 V at 10 mA, making it usable as a low-drop clamp or level-shifter. However, its primary design intent is reverse-bias Zener operation; forward characteristics are secondary and not optimized for switching or rectification duty cycles.
Is pin 2 (n.c.) required to be left unconnected on the PCB?
Yes - pin 2 is internally not connected and must remain electrically floating. No trace, pad, or solder mask relief is required. Connecting it risks mechanical stress or unintended parasitic coupling; Nexperia's SOT23 layout guidelines explicitly prohibit routing to this terminal.
How does the BZX8450-B30R's thermal resistance affect its derating curve?
With Rth(j-a) = 500 K/W, the junction temperature rises 125 K at full 250 mW dissipation - limiting ambient operation to ≤25 °C for continuous use. Derating begins linearly above 25 °C, reaching zero power at 150 °C ambient, per IEC 60134 absolute maximum ratings.
BZX8450-B30R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX8450
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 30 V
- Tolerance:
- ±2%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 22.8 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BZX8450-B30R FAQ
1.How can I place an order for BZX8450-B30R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-B30R 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 BZX8450-B30R reliable?
The price and inventory of BZX8450-B30R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-B30R is usually 5 days.
3.What payment methods are accepted for BZX8450-B30R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-B30R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-B30R?
BZX8450-B30R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-B30R 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 BZX8450-B30R?
For technical support, including BZX8450-B30R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-B30R requirements.
6.How does Aetrix verify that BZX8450-B30R is sourced from the original manufacturer or authorized distributors?
All BZX8450-B30R 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 BZX8450-B30R meets industry standards.
7.What is the process for return or replacement of BZX8450-B30R?
All BZX8450-B30R units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-B30R, 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 BZX8450-B30R part is unused and in its original packaging.
Return procedure for BZX8450-B30R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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