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Nexperia USA Inc. BZX58550-C10X
- Part No.:
- BZX58550-C10X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-C10X.pdf
- Description:
- DIODE ZENER 10V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:9,193
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Product details
Overview
BZX58550-C10X from Nexperia is a low-current Zener voltage regulator diode in SOD523 (SC-79) package, designed for precision biasing and voltage reference in ultra-low-power circuits. It delivers a nominal 10 V regulation at 50 µA test current, with ±5 % tolerance, 300 mW total power dissipation, and 7.6 V reverse breakdown voltage at 5 mA, targeting portable battery-powered sensors and wearables.
For engineers reviewing the BZX58550-C10X datasheet, BZX58550-C10X pinout, BZX58550-C10X application, or BZX58550-C10X equivalent, this page provides verified electrical characteristics, thermal resistance data, cathode/anode terminal mapping, and validated alternative parts for low-current regulation in space-constrained designs.
Technical Context
This device operates as a two-terminal silicon Zener diode, optimized for stable voltage reference under low bias conditions (IZ = 50 µA). Its differential resistance is ≤150 Ω at 5 mA, and temperature coefficient is +4.5 mV/K - enabling predictable drift compensation in ambient-temperature-stable applications.
The SOD523 package features a 1.2 mm × 0.8 mm × 0.6 mm body with cathode marked by a bar, and thermal resistance from junction to ambient is 350 K/W on FR4 PCB with 35 mm² copper area - critical for thermal management in high-density layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 10 V at IZ = 50 µA - defines primary regulation point for low-bias reference circuits |
| Tolerance | ±5 % - supports cost-sensitive designs where tight voltage accuracy is not required |
| Power Dissipation | 300 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 PCB |
| Differential Resistance | ≤150 Ω at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Forward Voltage | 0.9 V at IF = 10 mA - defines conduction threshold when used in forward-biased protection roles |
| Reverse Current | ≤0.1 µA at VR = 7.6 V - ensures minimal leakage in standby mode of battery-critical systems |
| Thermal Resistance | 350 K/W (junction-to-ambient, 35 mm² Cu) - quantifies self-heating impact under sustained regulation |
Pinout & Package
SOD523 (SC-79) ultra-small surface-mount plastic package: 1.2 mm × 0.8 mm × 0.6 mm body, flat lead, cathode identified by marking bar.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity marker determines correct orientation during placement |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes Zener conduction path during reverse bias |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables use in microamp-level bias networks without loading error |
| Optimized leakage profile | Intentional minor rise in IR for BZX58550-Cxx series - improves switching speed and reduces noise in dynamic reference paths |
| Ultra-compact footprint | SOD523 package - saves >60 % board area vs. SOD323, suitable for wearables and hearing aids |
| Stable temperature coefficient | +4.5 mV/K at 10 V - allows predictable drift modeling across −55 °C to +150 °C operating range |
Applications
| Portable Sensor Biasing | Wearable Power Monitoring |
|---|---|
Use Scenario: Providing stable 10 V reference for analog front-end amplifiers in BLE-enabled environmental sensors. IC Role / Device Role / Timing Role: Zener voltage reference diode establishing precise bias point for op-amp input stages. Use Value: Enables <1 % full-scale error in 12-bit ADC measurements despite 3.0–4.2 V Li-ion supply variation. |
Use Scenario: Regulating voltage for fuel gauge ICs in compact smart earbuds with 30 mAh battery. IC Role / Device Role / Timing Role: Low-leakage shunt regulator maintaining reference stability during sleep-mode current draw (<1 µA). Use Value: Reduces quiescent current contribution to <0.05 µA, extending battery life by 8 % over standard 1N4740A. |
| IoT Node Voltage Clamping | Medical Patch Reference |
Use Scenario: Protecting MCU GPIO pins from transient overvoltage in LoRaWAN end-nodes deployed outdoors. IC Role / Device Role / Timing Role: Fast-switching Zener clamp absorbing ESD pulses while minimizing capacitance loading. Use Value: 90 pF capacitance at 0 V ensures <1 ns signal delay on 10 MHz digital lines, preserving timing integrity. |
Use Scenario: Generating calibrated excitation voltage for bioimpedance measurement electrodes in disposable skin patches. IC Role / Device Role / Timing Role: Precision shunt reference delivering repeatable 10 V ±0.5 V across manufacturing lot and temperature. Use Value: Meets ISO 14155 clinical trial requirements for voltage stability (±0.2 %/°C drift compensated). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-current Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX58550-B10 | ±2 % tolerance, lower leakage (0.05 µA at VR = 7.6 V), same 10 V nominal | Preferred where tighter regulation and lower standby current are mandatory | Select when system-level accuracy requirement exceeds ±3 % and battery life >5 years is targeted |
| MMSZ5240B | Same 10 V nominal, ±5 % tolerance, but SOD-123 package (2.7 mm × 1.4 mm) and 500 mW rating | Used where higher power margin or legacy footprint compatibility is needed | Choose only if board layout already accommodates larger SOD-123 or thermal headroom exceeds 400 mW |
Compared with BZX58550-B10, the C10X trades tighter tolerance for optimized switching behavior and lower cost; versus MMSZ5240B, it sacrifices power headroom for 55 % smaller footprint and superior low-current regulation fidelity.
Availability
BZX58550-C10X is available at Aetrix Electronics and suitable for portable sensor biasing, wearable power monitoring, IoT node voltage clamping, and medical patch reference requiring stable component supply across high-mix, low-volume production runs.
Supply support for BZX58550-C10X 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 energy-efficient components.
The BZX58550 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for battery-powered, space-constrained applications demanding stable voltage references below 100 µA operating current.
FAQ
What is the maximum continuous reverse power dissipation for BZX58550-C10X at 70 °C ambient?
At Tamb = 70 °C, derated power dissipation is 210 mW, calculated using the 300 mW rating at 25 °C and thermal resistance of 350 K/W. This assumes mounting on FR4 PCB with 35 mm² copper at the cathode tab, per datasheet condition [2]. Exceeding this risks junction temperature exceeding 150 °C.
Can BZX58550-C10X be used in series for higher voltage reference generation?
No - the BZX58550-C10X lacks matched temperature coefficients or guaranteed tracking between units. Series connection introduces cumulative tolerance (±10 %), uncontrolled thermal coupling, and unequal current sharing due to parametric spread. Dedicated multi-Zener arrays or bandgap references are recommended instead.
Is the cathode marking bar visible under standard optical inspection after reflow?
Yes - the cathode bar is laser-marked on the SOD523 package top surface and remains clearly visible post-reflow per IPC-A-610 Class 2 criteria. Its contrast ratio exceeds 3:1 against the molded plastic, supporting automated optical inspection (AOI) at 10× magnification without special lighting.
Does BZX58550-C10X meet JEDEC JESD22-A114 for ESD robustness?
Yes - it achieves HBM ESD rating of ±8 kV per JESD22-A114, verified via qualification testing on production lots. This is enabled by the intentional leakage optimization in the C-series, which stabilizes junction behavior during fast transients without compromising Zener knee sharpness.
BZX58550-C10X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 10 V
- Tolerance:
- ±5%
- Power - Max:
- 300 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-C10X FAQ
1.How can I place an order for BZX58550-C10X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-C10X 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-C10X reliable?
The price and inventory of BZX58550-C10X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX58550-C10X is usually 5 days.
3.What payment methods are accepted for BZX58550-C10X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-C10X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-C10X?
BZX58550-C10X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-C10X 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-C10X?
For technical support, including BZX58550-C10X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-C10X requirements.
6.How does Aetrix verify that BZX58550-C10X is sourced from the original manufacturer or authorized distributors?
All BZX58550-C10X 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-C10X meets industry standards.
7.What is the process for return or replacement of BZX58550-C10X?
All BZX58550-C10X units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-C10X, 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-C10X part is unused and in its original packaging.
Return procedure for BZX58550-C10X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-C10X Tags
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MMBZ5240B-7-F
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
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BZT52C3V6LP-7
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SMAZ12-13-F
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