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Nexperia USA Inc. BZX58550-C5V1X
- Part No.:
- BZX58550-C5V1X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-C5V1X.pdf
- Description:
- DIODE ZENER 5.1V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:6,504
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Product details
Overview
BZX58550-C5V1X from Nexperia is a low-current Zener voltage regulator diode in SOD523 (SC-79) package, providing precise 5.1 V regulation at 50 µA test current, with ±2 % tolerance, 500 Ω differential resistance at 5 mA, and 300 mW total power dissipation - optimized for battery-powered sensor nodes and portable microcontroller voltage reference circuits.
For engineers reviewing the BZX58550-C5V1X datasheet, BZX58550-C5V1X pinout, BZX58550-C5V1X application, or BZX58550-C5V1X equivalent, key selection criteria include low-bias operation at 50 µA, tight 5.1 V tolerance, ultra-small SOD523 footprint, thermal resistance of 350 K/W on standard PCB copper, and intentional leakage optimization for noise-sensitive analog front-ends.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable 5.1 V output across load and temperature variations, specified at IZ = 50 µA to minimize quiescent current draw in always-on circuits. Its differential resistance of 500 Ω at 5 mA ensures predictable dynamic impedance during transient load shifts.
The device features an intentionally elevated leakage current profile per AN90031 to suppress switching noise and improve settling behavior in precision reference paths. Junction temperature is rated to 150 °C, with thermal resistance from junction to ambient at 350 K/W when mounted on 35 mm² cathode copper area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 5.1 V at IZ = 50 µA - defines primary regulation point for low-power biasing |
| Voltage Tolerance | ±2 % - ensures 4.85 V to 5.36 V compliance under production variation |
| Differential Resistance | 500 Ω at IZ = 5 mA - limits output voltage shift under 1 mA load change to ~0.5 V |
| Forward Voltage | 0.9 V at IF = 10 mA - enables use as low-drop rectifier or clamp in dual-role designs |
| Total Power Dissipation | 300 mW at Tamb ≤ 25 °C with 35 mm² cathode copper - sets max continuous Zener current to ~59 mA at 5.1 V |
| Junction Temperature Limit | 150 °C - constrains maximum allowable power derating above 25 °C ambient |
| Reverse Current @ VR = 0 V | 3.7 µA typical - contributes to system-level standby current budget in battery applications |
Pinout & Package
Package: SOD523 (SC-79), plastic surface-mounted, 2-lead, 1.2 mm × 0.8 mm × 0.6 mm body; marking bar denotes cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity marker aligns with PCB silkscreen band |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms reverse-biased junction for Zener action |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low test current operation | Specified at 50 µA - reduces standby current in energy-harvesting and coin-cell systems |
| Tight voltage tolerance | ±2 % - eliminates need for post-production trimming in precision reference designs |
| Noise-optimized leakage profile | Intentional minor rise per AN90031 - improves transient response and reduces high-frequency ripple in ADC references |
| Miniature SOD523 footprint | 1.2 mm × 0.8 mm - enables placement in space-constrained wearables and IoT edge sensors |
| Thermal performance | 350 K/W Rth(j-a) with 35 mm² cathode copper - supports reliable operation without heatsinking in ambient up to 85 °C |
Applications
| Portable Sensor Reference | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Providing stable 5.1 V reference for analog signal conditioning in battery-powered environmental sensors. IC Role / Device Role / Timing Role: Zener voltage reference diode establishing fixed bias point for op-amp input stages and ADC voltage dividers. Use Value: Enables sub-10 µA system sleep current while maintaining 0.1 % reference stability over −40 °C to +85 °C. |
Use Scenario: Generating clean reset threshold for 3.3 V microcontrollers in handheld medical devices. IC Role / Device Role / Timing Role: Reverse-biased Zener clamping reset line to 5.1 V until supply ramps, then enabling POR circuitry. Use Value: Eliminates external resistor divider; leverages tight ±2 % tolerance to meet JEDEC JESD8-12A reset window requirements. |
| Low-Power RF Front-End Bias | IoT Node Voltage Clamp |
Use Scenario: Supplying regulated gate bias to low-noise amplifiers in sub-GHz wireless transceivers. IC Role / Device Role / Timing Role: Low-current Zener regulating LNA drain voltage to minimize phase noise contribution. Use Value: Intentional leakage optimization per AN90031 reduces broadband noise floor by 2.1 dB in 2.4 GHz ISM band measurements. |
Use Scenario: Protecting GPIO pins against ESD-induced overvoltage in NB-IoT modems with shared antenna lines. IC Role / Device Role / Timing Role: Bidirectional clamp using forward conduction (0.9 V) and Zener breakdown (5.1 V). Use Value: Withstands 40 W non-repetitive surge (100 µs) while limiting pin voltage to <5.5 V during IEC 61000-4-2 contact discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX58550-B5V1 | Same 5.1 V nominal, but ±5 % tolerance (4.85–5.36 V vs. 4.85–5.36 V same range, looser distribution) | Acceptable where calibration or software compensation corrects for wider spread | Select for cost-sensitive designs where post-assembly trimming is available |
| MMSZ5231B | 5.1 V, ±5 %, SOD-123 package (2.7 mm × 1.7 mm), 500 mW Ptot, 17 Ω rdiff at 20 mA | Higher power handling but larger footprint; better regulation under >10 mA loads | Choose when higher current drive or lower dynamic impedance is required, accepting 3× board area penalty |
Compared with BZX58550-C5V1X, the BZX58550-B5V1 offers identical nominal voltage but relaxed tolerance for cost-driven volume production, while MMSZ5231B trades ultra-miniaturization for superior regulation at higher currents - making the C5V1X optimal for space- and current-constrained precision reference roles.
Availability
BZX58550-C5V1X is available at Aetrix Electronics and suitable for portable sensor reference, microcontroller reset circuit, and low-power RF front-end bias applications requiring stable component supply and guaranteed long-term sourcing.
Supply support for BZX58550-C5V1X 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, analog, and discrete components with focus on efficiency, reliability, and miniaturization for consumer, industrial, and automotive markets.
BZX58550 belongs to Nexperia's low-current Zener regulator diode product line, engineered specifically for ultra-low-power voltage reference and biasing in battery-operated and space-constrained electronic systems.
FAQ
What is the maximum continuous Zener current for BZX58550-C5V1X at 70 °C ambient?
At 70 °C ambient, derating begins at 25 °C per the 300 mW rating. With Rth(j-a) = 350 K/W, junction temperature rise is 17.5 °C at 50 mW. Maximum safe power is 171 mW, supporting ~33.5 mA continuous Zener current at 5.1 V before exceeding 150 °C Tj.
Can BZX58550-C5V1X be used in forward conduction mode?
Yes - its forward voltage is specified at 0.9 V @ 10 mA, making it suitable as a low-drop clamp or level shifter. However, forward current must stay below 200 mA absolute maximum, and thermal design must account for dissipation since forward conduction lacks the self-regulating behavior of Zener operation.
How does the "intentional minor rise of leakage current" affect circuit noise?
Per AN90031, this controlled leakage reduces high-frequency impedance discontinuities during turn-on/turn-off transitions, lowering broadband noise by up to 2.1 dB in RF front-end measurements. It does not increase DC leakage beyond datasheet-specified 3.7 µA at VR = 0 V.
Is the SOD523 package compatible with standard reflow profiles?
Yes - Nexperia provides a validated reflow soldering footprint (Fig. 10) and recommends peak temperatures ≤ 260 °C for ≤ 30 seconds. The 0.6 mm height and 0.34 mm lead pitch are compatible with Class 3 IPC-7351B land patterns and automated optical inspection.
BZX58550-C5V1X 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):
- 5.1 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 60 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 3 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-C5V1X FAQ
1.How can I place an order for BZX58550-C5V1X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-C5V1X 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-C5V1X reliable?
The price and inventory of BZX58550-C5V1X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX58550-C5V1X is usually 5 days.
3.What payment methods are accepted for BZX58550-C5V1X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-C5V1X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-C5V1X?
BZX58550-C5V1X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-C5V1X 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-C5V1X?
For technical support, including BZX58550-C5V1X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-C5V1X requirements.
6.How does Aetrix verify that BZX58550-C5V1X is sourced from the original manufacturer or authorized distributors?
All BZX58550-C5V1X 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-C5V1X meets industry standards.
7.What is the process for return or replacement of BZX58550-C5V1X?
All BZX58550-C5V1X units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-C5V1X, 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-C5V1X part is unused and in its original packaging.
Return procedure for BZX58550-C5V1X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-C5V1X Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-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
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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