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Nexperia USA Inc. BZX8450-C5V6R
- Part No.:
- BZX8450-C5V6R
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-C5V6R.pdf
- Description:
- DIODE ZENER 5.6V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:71,976
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Product details
Overview
BZX8450-C5V6R from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, designed for precision voltage reference and biasing in space-constrained portable electronics. It delivers 5.6 V nominal regulation at 50 µA test current, with ±5 % tolerance, 400 Ω differential resistance at 5 mA, and −2.0 mV/K temperature coefficient. Used in battery-powered sensor signal conditioning circuits where low quiescent current and stable reference are critical.
For engineers reviewing the BZX8450-C5V6R datasheet, BZX8450-C5V6R pinout, BZX8450-C5V6R application, or BZX8450-C5V6R equivalent, this page provides verified electrical parameters, thermal behavior, SOT23 terminal mapping, real-world use cases, and validated alternative parts for low-power voltage reference design.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 5.32 V to 5.88 V at IZ = 50 µA. Its low 50 µA test current enables operation in ultra-low-power bias networks, while its −2.0 mV/K temperature coefficient ensures predictable drift across −55 °C to +150 °C ambient range.
The device exhibits 120 pF junction capacitance at 0 V and <0.8 µA reverse leakage at VR = 5.1 V, making it suitable for noise-sensitive analog front-ends. Thermal resistance from junction to ambient is 500 K/W on standard FR4 PCB, limiting continuous power dissipation to 250 mW at Tamb ≤ 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 5.6 V (range 5.32–5.88 V at 50 µA); sets precise DC reference level in low-current bias chains |
| Tolerance | ±5 % (C-series); allows predictable worst-case voltage margin in reference design |
| Differential Resistance | 400 Ω at 5 mA; defines output impedance and load regulation error under small-signal variation |
| Temperature Coefficient | −2.0 mV/K; quantifies voltage drift per degree Celsius for thermal stability analysis |
| Reverse Leakage Current | ≤0.8 µA at VR = 5.1 V; ensures minimal parasitic current draw in high-impedance nodes |
| Junction Capacitance | 120 pF at 0 V, 1 MHz; impacts high-frequency noise coupling and bandwidth in filtering applications |
| Max Power Dissipation | 250 mW at Tamb ≤ 25 °C; constrains usable current range in thermally unenhanced PCB layouts |
Pinout & Package
SOT23 plastic surface-mount package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch, single-sided FR4 mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connected to lower-potential node; reverse-biased during regulation; must be held at voltage ≤ cathode minus VZ |
| 2 | Not Connected (n.c.) | Internally unconnected; no electrical function; must remain floating or grounded per layout best practice |
| 3 | Cathode (K) | Connected to higher-potential node; defines regulated output voltage referenced to anode; carries full Zener current |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables use in microampere-level bias networks without compromising regulation accuracy |
| Optimized leakage profile | Intentional minor rise in IR improves switching speed and reduces noise in dynamic reference applications |
| Stable thermal coefficient | −2.0 mV/K at 5.6 V - supports predictable voltage drift modeling over industrial temperature range |
| Controlled junction capacitance | 120 pF at 0 V - limits high-frequency coupling into sensitive analog signal paths |
Applications
| Portable Sensor Biasing | Low-Power ADC Reference |
|---|---|
|
Use Scenario: Providing stable excitation voltage to MEMS pressure sensors in wearable health monitors. IC Role / Device Role / Timing Role: Zener diode acting as two-terminal shunt voltage reference, sourcing bias current to sensor bridge. Use Value: 50 µA test current matches sensor's ultra-low standby current; ±5 % tolerance ensures consistent offset calibration across production units. |
Use Scenario: Generating reference voltage for 12-bit SAR ADC in battery-operated environmental data loggers. IC Role / Device Role / Timing Role: Passive voltage reference element establishing VREF input to ADC, independent of supply rail fluctuations. Use Value: −2.0 mV/K TC minimizes gain error drift over −20 °C to +70 °C operating range; 400 Ω rdiff maintains reference stability under varying ADC input loading. |
| Microcontroller Reset Circuit | LED Current Regulation |
|
Use Scenario: Setting threshold voltage for RC-based reset generator in ultra-low-power MCU sleep/wake systems. IC Role / Device Role / Timing Role: Zener clamping node voltage to define precise reset release point during VDD ramp-up. Use Value: Low 0.8 µA leakage at 5.1 V prevents premature discharge of timing capacitor; SOT23 footprint saves board area in compact modules. |
Use Scenario: Stabilizing forward current for indicator LEDs in handheld diagnostic tools with variable battery voltage. IC Role / Device Role / Timing Role: Shunt regulator maintaining constant voltage across series resistor to set LED current. Use Value: 250 mW power rating supports up to ~44 mA through 120 Ω resistor at 5.6 V; 120 pF capacitance avoids RF interference in EMI-sensitive medical enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C5V6 | Same 5.6 V, ±5 %, SOT23 package but rated for 300 mW Ptot; higher 500 Ω rdiff at 5 mA | Higher power handling suits higher-current biasing; less stable regulation under load variation | Select when >250 mW dissipation is required and tighter rdiff is not critical |
| MMSZ5232B | 5.6 V, ±5 %, SOD-123 package; 500 mW rating; 17 Ω rdiff at 20 mA; −2.5 mV/K TC | Larger footprint and higher test current (20 mA) limit use in sub-100 µA systems | Choose for improved load regulation in medium-current references where board space permits SOD-123 |
Compared with BZX8450-C5V6R, BZX84-C5V6 offers higher power margin but looser regulation, while MMSZ5232B delivers superior dynamic performance at the cost of higher bias current and larger package-making BZX8450-C5V6R optimal for ultra-low-power, space-constrained Zener reference roles.
Availability
BZX8450-C5V6R is available at Aetrix Electronics and suitable for portable sensor biasing, low-power ADC reference, and microcontroller reset circuitry requiring stable component supply with tight Zener tolerance and minimal board footprint.
Supply support for BZX8450-C5V6R 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 discrete and logic devices, with leadership in automotive-qualified and industrial-grade components.
The BZX8450 series belongs to Nexperia's low-current Zener regulator portfolio, engineered specifically for battery-powered and space-constrained applications demanding precision voltage references at microampere bias levels.
FAQ
What is the maximum continuous reverse current the BZX8450-C5V6R can sustain without exceeding its power rating?
At ambient temperature ≤25 °C on standard FR4 PCB, the device sustains up to 44.6 mA continuously (250 mW ÷ 5.6 V), assuming full 5.6 V drop across the diode. Derating is required above 25 °C per its 500 K/W thermal resistance; at 70 °C ambient, max current drops to ~28 mA to maintain Tj ≤150 °C.
Can BZX8450-C5V6R be used in place of a 5.6 V TL431-based reference?
No - the BZX8450-C5V6R is a passive two-terminal Zener diode requiring external current limiting, whereas TL431 is an active three-terminal adjustable shunt regulator with built-in error amplifier and feedback. They differ fundamentally in topology, accuracy, temperature stability, and minimum operating current (TL431 needs ≥1 mA).
Why does Pin 2 show 'n.c.' and how should it be handled in PCB layout?
Pin 2 is internally unconnected and serves only as mechanical support in the SOT23 mold. It must remain electrically floating - do not tie to ground or any net. Layout best practice recommends leaving it unmasked or applying solder mask to prevent accidental shorting during reflow, as confirmed by Nexperia's official SOT23 footprint guidelines.
How does the −2.0 mV/K temperature coefficient affect output voltage over a −40 °C to +85 °C range?
Over that 125 K span, the Zener voltage shifts by −250 mV (−2.0 mV/K × 125 K), resulting in a total variation of approximately −4.5 % from nominal 5.6 V. This is fully specified and repeatable; designers compensate using resistor-divider trimming or system-level calibration if sub-1 % absolute accuracy is required across temperature.
BZX8450-C5V6R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 5.6 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 4 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-C5V6R FAQ
1.How can I place an order for BZX8450-C5V6R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-C5V6R 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-C5V6R reliable?
The price and inventory of BZX8450-C5V6R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-C5V6R is usually 5 days.
3.What payment methods are accepted for BZX8450-C5V6R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C5V6R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-C5V6R?
BZX8450-C5V6R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-C5V6R 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-C5V6R?
For technical support, including BZX8450-C5V6R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C5V6R requirements.
6.How does Aetrix verify that BZX8450-C5V6R is sourced from the original manufacturer or authorized distributors?
All BZX8450-C5V6R 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-C5V6R meets industry standards.
7.What is the process for return or replacement of BZX8450-C5V6R?
All BZX8450-C5V6R units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C5V6R, 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-C5V6R part is unused and in its original packaging.
Return procedure for BZX8450-C5V6R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-C5V6R 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
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