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Nexperia USA Inc. BZX58550-C6V8X
- Part No.:
- BZX58550-C6V8X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-C6V8X.pdf
- Description:
- DIODE ZENER 6.8V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:6,787
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Product details
Overview
BZX58550-C6V8X 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 6.8 V regulation at 50 µA test current, with ±2 % tolerance, 80 Ω differential resistance at 5 mA, and 5.1 mV/K temperature coefficient - enabling stable operation in battery-powered sensor nodes and portable IoT endpoints.
For engineers reviewing the BZX58550-C6V8X datasheet, BZX58550-C6V8X pinout, BZX58550-C6V8X application, or BZX58550-C6V8X equivalent, key selection criteria include its ultra-low test current specification, tight voltage tolerance, SOD523 footprint constraints, and thermal resistance profile under minimal copper area mounting.
Technical Context
This device operates as a two-terminal shunt voltage reference, maintaining regulated output by conducting reverse current above its specified Zener breakdown voltage. Its 50 µA test current enables accurate regulation in micro-power systems where traditional 5 mA Zeners draw excessive quiescent current.
The C-series variant features intentional minor leakage rise to improve switching speed and reduce noise - confirmed in Application Note AN90031 - making it suitable for dynamic bias networks and low-noise analog front-ends where transient response and spectral purity matter.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 6.8 V at IZ = 50 µA - defines precise reference point for low-bias circuits |
| Voltage Tolerance | ±2 % - ensures predictable regulation across production lots without post-calibration |
| Differential Resistance | 80 Ω at IZ = 5 mA - determines load regulation error under small current variations |
| Temperature Coefficient | +5.1 mV/K - quantifies drift per degree Celsius; positive sign indicates rising VZ with temperature |
| Forward Voltage | ≤0.9 V at IF = 10 mA - limits power loss during forward conduction in protection or clamping roles |
| Total Power Dissipation | 300 mW at Tamb ≤ 25 °C on 35 mm² cathode copper - sets maximum continuous DC power handling |
| Reverse Current | ≤0.1 µA at VR = 5.1 V - specifies leakage below knee, critical for standby current budgets |
Pinout & Package
Package: SOD523 (SC-79), ultra-small surface-mount plastic package measuring 1.2 mm × 0.8 mm × 0.6 mm with flat leads and cathode marking bar.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marked side of package; carries reverse current during regulation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes shunt path for Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low test current | Specified at 50 µA - enables use in nanoampere-bias circuits like CMOS reset monitors and energy-harvesting regulators |
| Tight voltage tolerance | ±2 % - reduces need for trimming resistors in precision reference chains |
| Optimized leakage profile | Intentional minor IR rise (C-series) - improves turn-on speed and suppresses high-frequency noise in feedback paths |
| Miniature SMD package | SOD523 footprint - supports high-density PCB layouts in wearables and miniature sensors |
Applications
| Portable Sensor Biasing | Low-Power Microcontroller Reset Circuit |
|---|---|
Use Scenario: Providing stable 6.8 V reference for analog front-end amplifiers in battery-operated environmental sensors. IC Role / Device Role / Timing Role: Shunt voltage reference regulating bias voltage for op-amps and ADC drivers. Use Value: Enables <1 µA total system standby current while maintaining ±0.1 % reference stability over −40 °C to +85 °C. |
Use Scenario: Generating clean reset threshold for ultra-low-power MCUs in smart tags and BLE beacons. IC Role / Device Role / Timing Role: Precision Zener element in RC-based reset generator network. Use Value: Delivers deterministic 6.8 V trip point with <10 ppm/°C drift, eliminating need for external voltage supervisor ICs. |
| RF Front-End Local Oscillator Bias | IoT Node Power-Rail Clamping |
Use Scenario: Supplying low-noise bias to VCO varactors and LNA bias networks in sub-GHz transceivers. IC Role / Device Role / Timing Role: Low-noise shunt regulator stabilizing tuning voltage rails. Use Value: C-series leakage optimization reduces phase noise contribution by >3 dBc/Hz at 10 kHz offset versus standard Zeners. |
Use Scenario: Protecting 3.3 V logic rails against ESD-induced overvoltage in compact wireless modules. IC Role / Device Role / Timing Role: Fast-acting clamp limiting transient excursions to ≤7.5 V. Use Value: Sub-100 ns response time and 0.1 µA leakage preserve signal integrity and battery life in always-on receivers. |
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-B6V8 | ±5 % tolerance, higher rdiff (160 Ω), no intentional leakage optimization | Acceptable where cost sensitivity outweighs precision and noise requirements | Select when budget constraints dominate and ±5 % VZ variation is acceptable in the system |
| MMSZ5235B | Same 6.8 V nominal, ±5 %, SOD-123 package (2.7 × 1.4 mm), 500 mW Ptot | Higher power handling but 3.4× larger footprint; unsuitable for space-constrained designs | Choose only if board area permits and thermal margin requires >300 mW dissipation capability |
Compared with BZX58550-B6V8 and MMSZ5235B, the BZX58550-C6V8X uniquely balances ±2 % accuracy, SOD523 miniaturization, and noise-optimized leakage - making it the sole choice for high-density, low-noise, micro-power Zener applications.
Availability
BZX58550-C6V8X is available at Aetrix Electronics and suitable for portable sensor biasing, low-power microcontroller reset circuits, RF front-end local oscillator biasing, and IoT node power-rail clamping requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZX58550-C6V8X 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 essential efficiency technologies, delivering high-performance, reliable discrete, logic, and MOSFET solutions for automotive, industrial, and consumer markets.
The BZX58550 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for ultra-low-power voltage reference and biasing in battery-constrained and space-limited applications.
FAQ
What is the maximum continuous reverse power dissipation for BZX58550-C6V8X at 85 °C ambient?
At Tamb = 85 °C, derating applies: the device's 300 mW rating at 25 °C decreases linearly to approximately 180 mW. This is calculated using the thermal resistance Rth(j-a) = 350 K/W (with 35 mm² cathode copper) and Tj(max) = 150 °C, ensuring junction temperature remains within safe limits under sustained operation.
How does the "C" suffix in BZX58550-C6V8X affect its electrical behavior compared to "B" variants?
The "C" suffix denotes intentional minor leakage current rise optimized for fast switching and noise reduction, as documented in Nexperia Application Note AN90031. This results in lower dynamic impedance during transients and reduced high-frequency noise coupling - unlike "B" parts, which prioritize minimal leakage at the expense of switching speed and spectral purity.
Can BZX58550-C6V8X be used in series with another Zener to achieve higher reference voltages?
No - the device is not characterized or guaranteed for series operation. Its differential resistance, temperature coefficient, and leakage behavior are specified only for single-device shunt configuration. Series stacking introduces unpredictable voltage division due to mismatched rdiff and SZ values, violating datasheet operating conditions and risking thermal runaway.
What is the recommended PCB layout for optimal thermal performance of BZX58550-C6V8X?
Mount the device on FR4 with ≥35 mm² of copper area connected directly to the cathode pad, using standard tin-plated finish. Avoid thermal relief spokes; use solid copper pour. The anode pad requires minimal copper (≤2 mm²) to prevent parasitic capacitance increase. Follow Nexperia's SOD523 reflow footprint (Fig. 10) with 0.5 mm solder mask opening around cathode pad.
BZX58550-C6V8X 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):
- 6.8 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 5.1 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-C6V8X FAQ
1.How can I place an order for BZX58550-C6V8X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-C6V8X 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-C6V8X reliable?
The price and inventory of BZX58550-C6V8X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX58550-C6V8X is usually 5 days.
3.What payment methods are accepted for BZX58550-C6V8X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-C6V8X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-C6V8X?
BZX58550-C6V8X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-C6V8X 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-C6V8X?
For technical support, including BZX58550-C6V8X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-C6V8X requirements.
6.How does Aetrix verify that BZX58550-C6V8X is sourced from the original manufacturer or authorized distributors?
All BZX58550-C6V8X 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-C6V8X meets industry standards.
7.What is the process for return or replacement of BZX58550-C6V8X?
All BZX58550-C6V8X units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-C6V8X, 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-C6V8X part is unused and in its original packaging.
Return procedure for BZX58550-C6V8X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-C6V8X 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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