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Nexperia USA Inc. BZX58550-C3V3X
- Part No.:
- BZX58550-C3V3X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-C3V3X.pdf
- Description:
- DIODE ZENER 3.3V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:8,579
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Product details
Overview
BZX58550-C3V3X from Nexperia is a low-current Zener voltage regulator diode in SOD523 (SC-79) package, providing precise 3.3 V ±2 % 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-C3V3X datasheet, BZX58550-C3V3X pinout, BZX58550-C3V3X application, or BZX58550-C3V3X equivalent, key selection criteria include its ultra-low test current (50 µA), tight ±2 % tolerance, 160 Ω differential resistance at 5 mA, −3.5 mV/K temperature coefficient, and SOD523 footprint compatibility with space-constrained PCB layouts.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable DC voltage under low-current conditions. Its specified regulation at 50 µA enables use in micropower systems where quiescent current must remain below 100 µA, and its intentional minor leakage rise improves switching speed and noise performance in signal conditioning paths.
The device features a negative temperature coefficient of −3.5 mV/K across 25 °C, ensuring predictable drift behavior in ambient-temperature-varying environments. Thermal resistance from junction to ambient is 350 K/W on FR4 PCB with 35 mm² cathode copper area, supporting reliable operation up to 150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 3.3 V ±2 % at IZ = 50 µA - enables accurate low-power biasing without external trimming |
| Differential Resistance | 160 Ω max at IZ = 5 mA - ensures minimal output impedance variation under light load shifts |
| Temperature Coefficient | −3.5 mV/K - provides predictable, linear voltage drift over industrial temperature range |
| Forward Voltage | 0.9 V max at IF = 10 mA - supports bidirectional clamping or dual-role protection/reference use |
| Total Power Dissipation | 300 mW at Tamb ≤ 25 °C on FR4 with 35 mm² cathode Cu - defines safe continuous operating envelope |
| Reverse Current | 0.8 µA max at VR = 3.0 V - guarantees low standby leakage in always-on monitoring circuits |
| Diode Capacitance | 160 pF at f = 1 MHz, VR = 0 V - limits high-frequency coupling in analog front-end references |
Pinout & Package
Package: SOD523 (SC-79), ultra-small surface-mount plastic package measuring 1.2 mm × 0.8 mm × 0.6 mm, with flat lead profile and cathode band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marked by visible bar on package body |
| 2 | Anode (A) | Connected to ground or lower-potential rail; reverse-biased during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - reduces system standby power by >95 % vs. standard 5 mA Zeners |
| Tight voltage tolerance | ±2 % (C-series) - eliminates need for post-assembly calibration in precision reference designs |
| Optimized leakage profile | Intentional minor IR rise per AN90031 - lowers switching noise and improves transient response in feedback paths |
| Ultra-compact footprint | SOD523 (1.2 × 0.8 mm) - saves >70 % board area vs. SOT23 Zeners while maintaining thermal reliability |
| Robust thermal rating | 150 °C max junction temperature - supports deployment in sealed enclosures without forced cooling |
Applications
| Portable Sensor Node Reference | USB-Powered Signal Conditioning |
|---|---|
Use Scenario: Providing stable 3.3 V bias to MEMS accelerometer and ADC in coin-cell–powered environmental monitor. IC Role / Device Role / Timing Role: Zener voltage reference establishing analog input common-mode level and ADC reference midpoint. Use Value: 50 µA regulation current extends battery life beyond 5 years; ±2 % tolerance ensures <0.5 LSB measurement error across temperature. |
Use Scenario: Clamping and regulating input to op-amp buffer stage in USB 5 V–to–3.3 V signal chain for audio interface. IC Role / Device Role / Timing Role: Low-capacitance (160 pF) shunt regulator absorbing supply ripple and ESD transients before sensitive analog circuitry. Use Value: 0.9 V forward drop allows bidirectional protection; 300 mW rating handles short-duration USB surge events without derating. |
| Low-Power MCU Reset Circuit | IoT Edge Device Brown-Out Detection |
Use Scenario: Generating clean reset threshold for ARM Cortex-M0+ microcontroller powered from single Li-ion cell via buck converter. IC Role / Device Role / Timing Role: Precision Zener defining 3.3 V reset release point in RC-based power-on reset generator. Use Value: −3.5 mV/K TC aligns with MCU VDD drift, minimizing false resets; 160 Ω rdiff ensures sharp threshold transition. |
Use Scenario: Monitoring regulated 3.3 V rail in NB-IoT modem module to trigger graceful shutdown before battery depletion. IC Role / Device Role / Timing Role: Low-leakage (0.8 µA @ 3.0 V) Zener enabling accurate undervoltage detection without loading supply. Use Value: Tight 3.3 V ±2 % tolerance sets detection window within 66 mV - sufficient to distinguish brown-out from normal ripple. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX58550-B3V3 | ±5 % tolerance (vs. ±2 %), higher leakage at VR = 3.0 V (1.5 µA vs. 0.8 µA) | Suitable for non-critical biasing where cost priority outweighs accuracy | Select when budget constraints dominate and 5 % regulation error is acceptable in system margin |
| MMSZ4685T1G | Same 3.3 V nominal, but ±5 % tolerance and 350 mW rating; SOD-123 package (2.7 × 1.4 mm) | Requires larger PCB area; higher thermal resistance (460 K/W) limits high-temp operation | Choose only if legacy SOD-123 footprint reuse is mandatory and space is not constrained |
Compared with BZX58550-B3V3 and MMSZ4685T1G, the BZX58550-C3V3X delivers superior accuracy and leakage control in the smallest footprint - making it optimal for next-generation ultra-low-power edge devices where board space and battery longevity are critical.
Availability
BZX58550-C3V3X is available at Aetrix Electronics and suitable for portable sensor nodes, USB-powered signal conditioners, low-power MCU reset circuits, and IoT edge device brown-out detection requiring stable component supply across long-lifecycle deployments.
Supply support for BZX58550-C3V3X 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-grade and industrial-grade components.
The BZX58550 series belongs to Nexperia's low-current Zener regulator portfolio, designed specifically for micropower reference and regulation in battery-operated and space-constrained electronics.
FAQ
What is the maximum reverse voltage this diode can withstand before breakdown?
The BZX58550-C3V3X has a nominal Zener voltage of 3.3 V with ±2 % tolerance, meaning breakdown occurs between 3.23 V and 3.37 V at 50 µA test current. Its absolute maximum reverse voltage is not rated separately - operation above 3.37 V risks exceeding specified regulation window and increasing power dissipation beyond safe limits.
Can this Zener be used in forward-bias mode as a regular diode?
Yes - the BZX58550-C3V3X exhibits a forward voltage of ≤0.9 V at 10 mA, making it usable as a low-drop rectifier or clamp in bidirectional protection schemes. However, its primary design intent and characterization are for reverse-bias regulation, so forward conduction parameters are secondary specifications.
How does the SOD523 package affect thermal performance compared to SOD-123?
The SOD523 package delivers significantly better thermal efficiency per unit area: with 35 mm² cathode copper, its Rth(j-a) is 350 K/W versus ~460 K/W for SOD-123 under identical conditions. This allows the BZX58550-C3V3X to sustain full 300 mW dissipation in tighter spaces where larger packages would thermally saturate.
Is this part qualified for automotive applications?
No - the BZX58550-C3V3X is not automotive-qualified. It is specified for industrial and consumer applications only. Nexperia explicitly states in its legal disclaimers that non-automotive qualified products are unsuitable for safety-critical or life-support systems, and no AEC-Q200 stress testing or qualification data is provided for this device.
BZX58550-C3V3X 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):
- 3.3 V
- Tolerance:
- ±5%
- Power - Max:
- 300 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-C3V3X FAQ
1.How can I place an order for BZX58550-C3V3X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-C3V3X 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-C3V3X reliable?
The price and inventory of BZX58550-C3V3X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX58550-C3V3X is usually 5 days.
3.What payment methods are accepted for BZX58550-C3V3X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-C3V3X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-C3V3X?
BZX58550-C3V3X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-C3V3X 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-C3V3X?
For technical support, including BZX58550-C3V3X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-C3V3X requirements.
6.How does Aetrix verify that BZX58550-C3V3X is sourced from the original manufacturer or authorized distributors?
All BZX58550-C3V3X 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-C3V3X meets industry standards.
7.What is the process for return or replacement of BZX58550-C3V3X?
All BZX58550-C3V3X units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-C3V3X, 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-C3V3X part is unused and in its original packaging.
Return procedure for BZX58550-C3V3X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-C3V3X 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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