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Nexperia USA Inc. BZX58550-B5V6X
- Part No.:
- BZX58550-B5V6X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-B5V6X.pdf
- Description:
- DIODE ZENER 5.6V 270MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:3,677
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Product details
Overview
BZX58550-B5V6X 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 5.6 V regulation at 50 µA test current, with ±2 % tolerance, 400 Ω differential resistance at 5 mA, and 120 pF capacitance at 0 V - enabling stable operation in portable battery-powered sensor nodes and IoT endpoint power rails.
For engineers reviewing the BZX58550-B5V6X datasheet, BZX58550-B5V6X pinout, BZX58550-B5V6X application, or BZX58550-B5V6X equivalent, this page provides verified electrical characteristics, thermal behavior under FR4 PCB mounting, cathode/anode terminal mapping, and validated alternatives for low-current Zener replacement in space-constrained designs.
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining a stable 5.6 V output across load variations by conducting reverse current above its breakdown threshold. Its specified test current of 50 µA enables minimal quiescent draw, while the intentional leakage profile (per AN90031) supports fast transient response and reduced noise in signal conditioning paths.
The SOD523 package imposes strict thermal constraints: total power dissipation is rated at 300 mW only when mounted on an FR4 PCB with ~35 mm² copper area at the cathode tab; junction-to-ambient thermal resistance drops from 460 K/W (standard footprint) to 350 K/W under that layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 5.6 V at IZ = 50 µA - defines primary regulation point for low-bias reference circuits |
| Voltage Tolerance | ±2 % - ensures tight output stability across production lots without trimming |
| Differential Resistance | 400 Ω at IZ = 5 mA - determines regulation slope and load-induced voltage deviation |
| Reverse Capacitance | 120 pF at VR = 0 V, f = 1 MHz - impacts high-frequency noise coupling in analog front-ends |
| Forward Voltage | 0.9 V at IF = 10 mA - defines conduction loss during polarity-reversal protection use cases |
| Max Power Dissipation | 300 mW at Tamb ≤ 25 °C with 35 mm² cathode copper - sets absolute thermal limit for continuous DC operation |
| Junction Temperature | 150 °C maximum - constrains ambient operating range when power and PCB copper are fixed |
Pinout & Package
SOD523 (SC-79) ultra-small surface-mount plastic package: 1.2 mm × 0.8 mm × 0.6 mm body, flat lead, cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated voltage node; marking bar identifies this terminal for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; reverse-biased configuration enables Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - reduces standby current in battery-critical applications like wearables and remote sensors |
| Tight voltage tolerance | ±2 % series - eliminates need for post-assembly calibration in precision reference designs |
| Optimized leakage profile | Intentional minor rise per AN90031 - improves switching speed and suppresses noise in feedback loops |
| Ultra-compact footprint | SOD523 package - saves >60 % board area versus SOD323, enabling dense RF and wearable layouts |
| Thermal performance control | 350 K/W Rth(j-a) with 35 mm² cathode copper - allows predictable derating in thermally constrained enclosures |
Applications
| Portable Sensor Biasing | IoT Node Voltage Reference |
|---|---|
Use Scenario: Providing stable 5.6 V bias to MEMS accelerometer signal chain in coin-cell-powered environmental monitor. IC Role / Device Role / Timing Role: Shunt Zener regulator establishing clean reference for ADC input and op-amp offset nulling. Use Value: 50 µA test current minimizes battery drain; ±2 % tolerance ensures consistent measurement accuracy across 10-year deployment. |
Use Scenario: Generating local 5.6 V reference for LoRaWAN transceiver LDO enable threshold in edge-node gateway. IC Role / Device Role / Timing Role: Precision voltage threshold detector defining power-on reset boundary and brown-out detection level. Use Value: 400 Ω dynamic impedance ensures sharp transition at enable point; 120 pF capacitance avoids RF interference coupling into digital control lines. |
| Wearable Health Monitor PSU | Industrial Control Signal Conditioning |
Use Scenario: Regulating excitation voltage for photodiode array in optical pulse oximeter using single-cell Li-ion supply. IC Role / Device Role / Timing Role: Low-noise Zener source feeding transimpedance amplifier bias network. Use Value: Optimized leakage profile (AN90031) suppresses 1/f noise; SOD523 size fits within 8 mm × 8 mm flex PCB zone. |
Use Scenario: Stabilizing 5.6 V reference for 4–20 mA loop transmitter DAC in factory-floor temperature controller. IC Role / Device Role / Timing Role: Two-terminal shunt regulator compensating for supply ripple and load-step transients. Use Value: 300 mW power rating supports 100 mA loop current headroom; 150 °C max junction temp ensures reliability in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX58550-C5V6 | ±5 % tolerance vs. ±2 %; identical 5.6 V nominal, same SOD523 package and 50 µA test current | Acceptable where system-level calibration compensates for wider voltage spread | Select when cost sensitivity outweighs need for tight initial accuracy |
| MMSZ5232B-7-F | 5.6 V ±5 %, SOD-123 package (2.7 mm × 1.4 mm), 500 mW Ptot, 100 µA test current | Higher power handling but 3.4× larger footprint; less suitable for ultra-dense layouts | Choose when thermal margin is critical and board space permits larger package |
Compared with BZX58550-B5V6X, the C5V6 variant trades initial accuracy for cost, while MMSZ5232B-7-F offers higher power capacity at the expense of size - making the B5V6X optimal for miniaturized, battery-sensitive systems requiring guaranteed ±2 % regulation at microamp bias.
Availability
BZX58550-B5V6X is available at Aetrix Electronics and suitable for portable sensor biasing, IoT node voltage reference, and wearable health monitor PSU requiring stable component supply with guaranteed ±2 % Zener tolerance and SOD523 footprint consistency.
Supply support for BZX58550-B5V6X 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 logic, discrete, and MOSFET devices, with manufacturing rooted in process optimization and automotive-grade quality systems.
The BZX58550 series belongs to Nexperia's low-current Zener regulator product line, engineered specifically for ultra-low-power voltage reference and biasing in space-constrained, battery-operated electronics - not general-purpose power regulation.
FAQ
What is the maximum continuous reverse power dissipation for BZX58550-B5V6X under standard PCB conditions?
The maximum continuous reverse power dissipation is 270 mW when mounted on a standard FR4 PCB with single-sided copper and tin-plated finish. This value rises to 300 mW only when the cathode pad has approximately 35 mm² of copper area, as defined in Table 5 limiting values and confirmed in thermal characterization data.
How does the BZX58550-B5V6X differ from the BZX58550-C5V6 in practical circuit design?
The BZX58550-B5V6X guarantees ±2 % Zener voltage tolerance at 50 µA, while the C5V6 variant specifies approximately ±5 %. Both share identical nominal voltage, package, test current, and thermal specs - so the B5V6X is selected when initial accuracy is critical, and the C5V6 suffices where system calibration absorbs the wider spread.
Can BZX58550-B5V6X be used in forward conduction mode, and what is its typical forward voltage?
Yes, it functions as a standard silicon diode in forward bias. At 10 mA forward current, the typical forward voltage is 0.9 V, as measured under pulsed conditions (tp ≤ 300 µs, duty cycle ≤ 0.02). This makes it viable for polarity protection or low-drop rectification where ultra-small size is prioritized over Schottky-level VF.
What thermal resistance value applies when designing for worst-case ambient temperature in sealed enclosures?
For worst-case thermal design in sealed enclosures, use Rth(j-a) = 460 K/W - the value for a standard FR4 PCB with single-sided copper and tin plating, per Table 6. This reflects minimal copper area and no forced airflow, ensuring conservative junction temperature estimation up to the 150 °C limit.
BZX58550-B5V6X 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):
- 5.6 V
- Tolerance:
- ±2%
- Power - Max:
- 270 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:
- SOD-523
BZX58550-B5V6X FAQ
1.How can I place an order for BZX58550-B5V6X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-B5V6X 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-B5V6X reliable?
The price and inventory of BZX58550-B5V6X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX58550-B5V6X is usually 5 days.
3.What payment methods are accepted for BZX58550-B5V6X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-B5V6X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-B5V6X?
BZX58550-B5V6X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-B5V6X 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-B5V6X?
For technical support, including BZX58550-B5V6X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-B5V6X requirements.
6.How does Aetrix verify that BZX58550-B5V6X is sourced from the original manufacturer or authorized distributors?
All BZX58550-B5V6X 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-B5V6X meets industry standards.
7.What is the process for return or replacement of BZX58550-B5V6X?
All BZX58550-B5V6X units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-B5V6X, 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-B5V6X part is unused and in its original packaging.
Return procedure for BZX58550-B5V6X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-B5V6X 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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