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Nexperia USA Inc. BZX58550-B10X
- Part No.:
- BZX58550-B10X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-B10X.pdf
- Description:
- DIODE ZENER 10V 270MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:4,966
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Product details
Overview
BZX58550-B10X from Nexperia is a low-current Zener voltage regulator diode in SOD523 (SC-79) package, designed for precision biasing and voltage reference in ultra-compact portable electronics. It delivers a nominal 10 V regulation at 50 µA test current, with ±2 % tolerance, 300 mW total power dissipation, and 7.6 V forward voltage at 10 mA - optimized for battery-powered sensor nodes and low-power microcontroller reset circuits.
For engineers reviewing the BZX58550-B10X datasheet, BZX58550-B10X pinout, BZX58550-B10X application, or BZX58550-B10X equivalent, key selection criteria include its ultra-low test current specification, tight 2 % tolerance, SOD523 footprint constraints, thermal resistance of 350 K/W on standard PCB copper, and intentional leakage profile for noise-sensitive analog front-ends.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 10.0 V (min 9.8 V, max 10.2 V) at IZ = 50 µA, exhibiting a differential resistance of ≤150 Ω at 5 mA and a temperature coefficient of +4.5 mV/K. Its low 50 µA test current enables stable regulation in micropower systems where quiescent current must remain below 100 µA.
The device features an intentionally elevated reverse leakage current (≤0.1 µA at VR = 7.6 V) to improve switching speed and reduce high-frequency noise - a design choice validated in Application Note AN90031 for signal integrity-critical applications such as ADC reference stabilization and RF bias networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 10.0 V at 50 µA - enables precise low-current reference generation without load-dependent drift |
| Tolerance | ±2 % - supports tight voltage margining in 3.3 V and 5 V system rails requiring <±50 mV error |
| Power Dissipation | 300 mW at Tamb ≤ 25 °C on FR4 with 35 mm² cathode copper - defines maximum continuous bias power in space-constrained layouts |
| Forward Voltage | 0.9 V at 10 mA - ensures minimal drop during forward conduction in dual-role clamp/reference circuits |
| Differential Resistance | ≤150 Ω at 5 mA - maintains regulation stability under small-signal load variations in feedback paths |
| Thermal Resistance | 350 K/W junction-to-ambient - determines temperature rise under 100 µA bias in sealed enclosures |
| Reverse Leakage | ≤0.1 µA at 7.6 V - balances low-noise operation with fast transient response per AN90031 |
Pinout & Package
SOD523 (SC-79) plastic surface-mount package: 1.2 mm × 0.8 mm × 0.6 mm body, ultra-flat lead profile, 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 |
|---|---|
| Ultra-low test current | 50 µA - enables regulation in energy-harvesting and coin-cell-powered devices without compromising battery life |
| Tight voltage tolerance | ±2 % - eliminates need for post-assembly trimming in factory-calibrated sensor modules |
| Optimized leakage profile | Controlled 0.1 µA IR at 7.6 V - reduces jitter in clock buffer references and improves settling time in DAC output stages |
| SOD523 footprint | 1.2 mm × 0.8 mm - fits within 1.5 mm² board area, supporting >2000 units per square inch in wearable PCBs |
| Thermal performance | 350 K/W Rth(j-a) on 35 mm² Cu - allows full 300 mW derating up to 70 °C ambient in thermally isolated sections |
Applications
| Portable Sensor Biasing | Microcontroller Reset Reference |
|---|---|
|
Use Scenario: Providing stable 10 V bias to MEMS pressure sensor bridge in Bluetooth LE environmental monitor. IC Role / Device Role / Timing Role: Zener voltage reference establishing common-mode point for instrumentation amplifier input stage. Use Value: ±2 % tolerance ensures sensor full-scale output remains within 0.5 % error band across -20 °C to +60 °C operating range. |
Use Scenario: Generating precise 10 V threshold for external reset supervisor IC monitoring 3.3 V MCU supply. IC Role / Device Role / Timing Role: Precision voltage reference defining reset assertion level independent of LDO dropout variation. Use Value: 50 µA test current draws negligible current from backup coin cell during brown-out detection. |
| RF Front-End Bias Network | Low-Power ADC Reference |
|
Use Scenario: Stabilizing gate voltage of GaAs FET LNA in sub-GHz IoT transceiver module. IC Role / Device Role / Timing Role: Low-noise Zener shunt regulating DC bias while suppressing RF coupling via controlled leakage. Use Value: Intentional leakage profile per AN90031 reduces phase noise contribution by 3 dB in 868 MHz band. |
Use Scenario: Supplying reference voltage to 12-bit SAR ADC in battery-operated data logger. IC Role / Device Role / Timing Role: Low-drift voltage reference source for ratiometric conversion of thermistor signals. Use Value: 150 Ω differential resistance limits reference error to <0.1 LSB under 10 µA ADC reference current load. |
Availability
BZX58550-B10X is available at Aetrix Electronics and suitable for portable sensor biasing, microcontroller reset reference, and RF front-end bias networks requiring stable component supply with guaranteed long-term continuity.
Supply support for BZX58550-B10X 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 delivering high-performance logic, discrete, and MOSFET solutions with focus on efficiency, reliability, and miniaturization for consumer, industrial, and automotive markets.
The BZX58550 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for voltage reference and biasing in space-constrained, battery-sensitive applications where traditional 1N47xx devices are too large or power-hungry.
FAQ
What is the maximum continuous reverse power dissipation for BZX58550-B10X at 70 °C ambient?
At 70 °C ambient, the maximum continuous reverse power dissipation is 225 mW, calculated using the derating factor of 2.5 mW/°C above 25 °C from the 300 mW rating at Tamb ≤ 25 °C with 35 mm² cathode copper area.
How does the BZX58550-B10X differ from the BZX58550-C10 in terms of voltage tolerance and leakage?
The BZX58550-B10X has ±2 % tolerance (9.8 V–10.2 V), while BZX58550-C10 offers ±5 % (9.5 V–10.5 V); both share identical 0.1 µA max reverse leakage at 7.6 V, but the B-series uses tighter process control for higher-precision applications.
Can BZX58550-B10X be used in place of a 1N4740A in a 10 V reference circuit?
No - the 1N4740A is rated for 1 W and 25 mA test current, whereas BZX58550-B10X is limited to 300 mW and 50 µA test current; substituting it requires redesigning bias resistors and verifying thermal margins in the target layout.
Is the SOD523 package of BZX58550-B10X compatible with standard reflow profiles for lead-free soldering?
Yes - Nexperia specifies compatibility with IPC/JEDEC J-STD-020D reflow profiles, including peak temperature of 260 °C for ≤30 seconds, and provides detailed solder land patterns in Figure 10 of the datasheet for reliable assembly yield.
BZX58550-B10X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX58550
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 10 V
- Tolerance:
- ±2%
- Power - Max:
- 270 mW
- Impedance (Max) (Zzt):
- 20 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 7.6 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-523
BZX58550-B10X FAQ
1.How can I place an order for BZX58550-B10X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-B10X 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 BZX58550-B10X reliable?
The price and inventory of BZX58550-B10X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX58550-B10X is usually 5 days.
3.What payment methods are accepted for BZX58550-B10X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-B10X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-B10X?
BZX58550-B10X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-B10X 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 BZX58550-B10X?
For technical support, including BZX58550-B10X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-B10X requirements.
6.How does Aetrix verify that BZX58550-B10X is sourced from the original manufacturer or authorized distributors?
All BZX58550-B10X 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 BZX58550-B10X meets industry standards.
7.What is the process for return or replacement of BZX58550-B10X?
All BZX58550-B10X units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-B10X, 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 BZX58550-B10X part is unused and in its original packaging.
Return procedure for BZX58550-B10X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-B10X Tags
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