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Nexperia USA Inc. BZX58550-B3V3X
- Part No.:
- BZX58550-B3V3X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-B3V3X.pdf
- Description:
- DIODE ZENER 3.3V 270MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:6,932
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Product details
Overview
BZX58550-B3V3X from Nexperia is a low-current Zener voltage regulator diode in SOD523 (SC-79) package, providing 3.3 V ±2 % nominal regulation at 50 µA test current, with 300 mW total power dissipation and 0.9 V forward voltage at 10 mA - optimized for battery-powered sensor nodes, portable IoT endpoints, and low-bias reference circuits.
For engineers reviewing the BZX58550-B3V3X datasheet, BZX58550-B3V3X pinout, BZX58550-B3V3X application, or BZX58550-B3V3X equivalent, key selection criteria include its ultra-low test current specification, tight ±2 % tolerance, thermal resistance of 350 K/W on standard PCB layout, and cathode-anode polarity marking per SC-79 footprint.
Technical Context
This device operates as a two-terminal shunt voltage reference, maintaining stable 3.3 V output across load variations by conducting reverse current above its breakdown threshold. Its differential resistance is ≤600 Ω at 50 µA and ≤100 Ω at 1 mA, enabling predictable regulation under light-load conditions.
The diode exhibits a temperature coefficient of −3.5 mV/K and capacitance of 160 pF at 0 V, making it suitable for noise-sensitive analog references where thermal drift and parasitic coupling must be minimized. It is not rated for automotive use and requires derating above 25 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 3.3 V ±2 % at IZ = 50 µA - ensures precise low-power biasing without active circuitry |
| Forward Voltage | 0.9 V max at IF = 10 mA - enables reliable anode-cathode conduction during power-up or fault conditions |
| Total Power Dissipation | 300 mW at Tamb ≤ 25 °C on FR4 PCB with 35 mm² cathode copper - defines maximum steady-state thermal load |
| Differential Resistance | ≤600 Ω at 50 µA; ≤100 Ω at 1 mA - determines regulation stiffness under varying load currents |
| Reverse Leakage Current | ≤1.5 µA at VR = 2.0 V - critical for ultra-low-quiescent-current designs like coin-cell sensors |
| Thermal Resistance (j-a) | 350 K/W with 35 mm² cathode Cu area - quantifies junction-to-ambient heat transfer efficiency on standard layout |
| Package | SOD523 (SC-79), 1.2 × 0.8 × 0.6 mm - supports high-density PCB placement in space-constrained wearables |
Pinout & Package
SOD523 (SC-79) surface-mount plastic package with 2 leads, 1.2 mm × 0.8 mm × 0.6 mm body dimensions and cathode band marking on terminal 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated voltage node; marked by bar on package; carries reverse breakdown current |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes shunt regulation path |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables stable regulation in µA-level supply domains such as RTC backup or wake-up comparators |
| Tight voltage tolerance | ±2 % (B-series) - reduces need for post-production trimming in precision reference chains |
| Ultra-small footprint | SOD523 package - saves >60 % board area vs. SOD323, critical for miniaturized medical patches |
| Controlled leakage profile | IR ≤ 1.5 µA at 2.0 V - prevents unintended discharge in energy-harvesting storage capacitors |
| Optimized thermal performance | Rth(j-sp) = 65 K/W at cathode solder point - supports reliable operation in thermally isolated modules |
Applications
| Portable Sensor Biasing | RTC Voltage Reference |
|---|---|
Use Scenario: Powering analog front-end of BLE temperature/humidity sensor running on CR2032 battery. IC Role / Device Role / Timing Role: Shunt regulator establishing stable 3.3 V reference for ADC and signal conditioning. Use Value: Enables 12-bit measurement accuracy over −20 °C to +70 °C with <±5 mV drift due to tight tolerance and −3.5 mV/K TC. |
Use Scenario: Maintaining accurate timekeeping in microcontroller-based smart meter during main power loss. IC Role / Device Role / Timing Role: Low-leakage voltage clamp for supercapacitor-backed RTC supply rail. Use Value: Limits standby current to <2 µA, extending backup runtime beyond 30 days without recharge. |
| IoT Node Wake-Up Circuit | Low-Power Comparator Threshold |
Use Scenario: Providing trigger voltage for nanopower comparator monitoring battery voltage in asset tracker. IC Role / Device Role / Timing Role: Precision Zener defining hysteresis threshold for wake-up event detection. Use Value: Delivers repeatable 3.3 V trip point with <±66 mV variation across temperature, eliminating software calibration. |
Use Scenario: Setting reference for window comparator detecting brown-out in wearable health monitor. IC Role / Device Role / Timing Role: Stable DC reference source for dual-comparator input. Use Value: Ensures consistent 3.3 V threshold across 10k-unit production batch without binning or adjustment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B3V3 | Same 3.3 V ±2 %, but SOD323 package (1.7 × 1.3 mm); 500 mW Ptot; higher rdiff (≤120 Ω @ 5 mA) | Higher power handling but 2.5× larger footprint - unsuitable for sub-3 mm² PCB real estate | Select when thermal margin >100 mW is required and board space allows SOD323 |
| MMSZ4685 | 3.3 V ±5 %; SOD123 package; 500 mW Ptot; rdiff ≤100 Ω @ 5 mA; IR ≤ 10 µA @ 1 V | Looser tolerance and higher leakage - degrades accuracy in precision analog sensing | Acceptable only for non-critical biasing where cost outweighs regulation stability |
Compared with BZX58550-B3V3X, BZX384-B3V3 offers greater thermal headroom but sacrifices miniaturization, while MMSZ4685 trades tolerance and leakage performance for broader availability - making the BZX58550-B3V3X optimal for space- and accuracy-constrained battery systems.
Availability
BZX58550-B3V3X is available at Aetrix Electronics and suitable for portable sensor biasing, RTC voltage reference, and IoT node wake-up circuits requiring stable component supply with guaranteed long-term sourcing.
Supply support for BZX58550-B3V3X 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 advanced packaging and automotive-qualified components.
The BZX58550 series belongs to Nexperia's low-current Zener regulator product line, engineered specifically for ultra-low-power, space-constrained applications including wearables, wireless sensors, and energy-harvesting systems.
FAQ
What is the maximum continuous reverse current the BZX58550-B3V3X can sustain at 25 °C ambient?
The device supports up to 200 mA forward current, but as a Zener regulator, its continuous reverse current is limited by power dissipation. At 25 °C ambient on a PCB with 35 mm² cathode copper, the maximum sustainable reverse current is 90.9 mA (300 mW ÷ 3.3 V), assuming full voltage drop across the diode.
Does the BZX58550-B3V3X meet AEC-Q200 or automotive qualification standards?
No. The BZX58550-B3V3X is explicitly designated as a non-automotive qualified product in Nexperia's legal disclaimers. It has not undergone AEC-Q200 stress testing and is not recommended for use in automotive safety-critical or infotainment systems.
How does the 50 µA test current affect circuit design compared to conventional 5 mA Zeners?
Operating at 50 µA enables direct connection to high-impedance nodes (e.g., op-amp inputs or comparator references) without loading, eliminates need for current-limiting resistors >100 kΩ, and reduces quiescent power by 100× versus 5 mA Zeners - essential for multi-year battery life.
Can the BZX58550-B3V3X be used in parallel for higher current capability?
No. Zener diodes exhibit manufacturing spread in breakdown voltage; paralleling causes current hogging, thermal runaway, and premature failure. For higher current, use a single higher-power Zener or a dedicated shunt regulator IC with current-sharing capability.
BZX58550-B3V3X 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):
- 3.3 V
- Tolerance:
- ±2%
- Power - Max:
- 270 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 7.5 µA @ 1.5 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-B3V3X FAQ
1.How can I place an order for BZX58550-B3V3X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-B3V3X 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-B3V3X reliable?
The price and inventory of BZX58550-B3V3X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX58550-B3V3X is usually 5 days.
3.What payment methods are accepted for BZX58550-B3V3X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-B3V3X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-B3V3X?
BZX58550-B3V3X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-B3V3X 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-B3V3X?
For technical support, including BZX58550-B3V3X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-B3V3X requirements.
6.How does Aetrix verify that BZX58550-B3V3X is sourced from the original manufacturer or authorized distributors?
All BZX58550-B3V3X 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-B3V3X meets industry standards.
7.What is the process for return or replacement of BZX58550-B3V3X?
All BZX58550-B3V3X units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-B3V3X, 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-B3V3X part is unused and in its original packaging.
Return procedure for BZX58550-B3V3X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-B3V3X 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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