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Nexperia USA Inc. BZX58550-C24-QX
- Part No.:
- BZX58550-C24-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-C24-QX.pdf
- Description:
- DIODE ZENER 24V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:9,400
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Product details
Overview
BZX58550-C24-QX from Nexperia is a low-current Zener voltage regulator diode in SOD523 (SC-79) package, providing 24 V ±5 % nominal regulation at 50 µA test current, with 300 mW total power dissipation and qualified to AEC-Q101 for automotive use in bias, reference, and low-power supply rail stabilization circuits.
For engineers reviewing the BZX58550-C24-QX datasheet, BZX58550-C24-QX pinout, BZX58550-C24-QX application, or BZX58550-C24-QX equivalent, this page delivers verified electrical specs, thermal behavior, automotive qualification status, and real-world design context for portable, battery-powered, and automotive subsystems requiring stable low-current voltage references.
Technical Context
This device operates as a two-terminal reverse-biased Zener diode, delivering precise DC voltage regulation via controlled avalanche or Zener breakdown depending on nominal voltage - for the 24 V variant, breakdown is predominantly avalanche-based, yielding low temperature coefficient (±0.05 mV/K typical) and low dynamic impedance (250 Ω max at IZ = 5 mA).
It is characterized at low test current (50 µA), enabling ultra-low quiescent current operation ideal for always-on sensor nodes and battery-backed systems; its SOD523 footprint supports high-density PCB layouts while maintaining thermal performance up to 150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 24 V ±5 % at IZ = 50 µA - defines stable reference point for low-bias circuits without load-dependent drift |
| Max Power Dissipation | 300 mW at Tamb ≤ 25 °C on FR4 with 35 mm² cathode copper - sets absolute upper limit for continuous DC power handling |
| Forward Voltage | ≤ 0.9 V at IF = 10 mA - ensures minimal forward drop when used in polarity-sensitive protection or clamping roles |
| Differential Resistance | ≤ 250 Ω at IZ = 5 mA - quantifies voltage regulation stiffness under small-signal load variations |
| Reverse Current | ≤ 0.05 µA at VR = 18.2 V - confirms sharp knee and low leakage below regulation threshold |
| Junction Temperature | −55 °C to +150 °C - enables operation in under-hood automotive environments and industrial edge nodes |
| AEC-Q101 Qualified | Yes - validated for automotive discrete semiconductor stress testing including HTGB, HTRB, and temperature cycling |
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; marking bar identifies this terminal - reverse-biased connection required for Zener operation |
| 2 | Anode (A) | Connected to circuit ground or lower-potential rail - completes bias path for controlled breakdown conduction |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables use in microamp-level bias networks without compromising regulation accuracy |
| Automotive qualification | AEC-Q101 compliant - supports deployment in engine control units, body electronics, and ADAS sensors without additional qualification effort |
| Optimized leakage profile | Intentional minor rise in leakage for C-series - improves switching speed and reduces noise in dynamic reference applications |
| Ultra-compact footprint | SOD523 package - saves >60 % board area vs. SOD-123, critical for space-constrained wearables and modules |
| Thermal robustness | Rth(j-a) = 350 K/W with 35 mm² cathode copper - sustains stable regulation under sustained ambient temperatures up to 105 °C |
Applications
| Automotive Cabin Sensors | Portable Medical Monitors |
|---|---|
Use Scenario: Voltage reference for analog front-end of tire pressure monitoring system (TPMS) sensor ICs operating from coin-cell batteries. IC Role / Device Role / Timing Role: Provides stable 24 V-derived reference for ADC calibration and LDO feedback, replacing larger 3-pin shunt regulators. Use Value: Enables 10-year battery life by drawing only 50 µA quiescent current while maintaining ±1 % reference stability over −40 °C to +125 °C. |
Use Scenario: Precision biasing of op-amps and transimpedance amplifiers in handheld pulse oximeters. IC Role / Device Role / Timing Role: Supplies low-noise, low-drift reference voltage for photodiode signal conditioning chain. Use Value: Delivers <0.5 % regulation error at 100 nA–100 µA load range, reducing gain drift and improving SpO₂ measurement repeatability. |
| Industrial IoT Node Power Rails | Automotive Infotainment USB Port Protection |
Use Scenario: Local regulation for microcontroller reset supervisor and RTC backup supply in wireless sensor nodes. IC Role / Device Role / Timing Role: Acts as shunt regulator for 3.3 V rail derived from energy-harvesting source with variable output. Use Value: Maintains clean 3.3 V reference during intermittent power events due to low capacitance (55 pF) and fast transient response. |
Use Scenario: Overvoltage clamp on 5 V USB data line in vehicle infotainment head unit. IC Role / Device Role / Timing Role: Fast-acting Zener clamp limiting transient spikes to <6.2 V during load dump events. Use Value: Survives 40 W non-repetitive surges (tp = 100 µs) per AEC-Q101, protecting downstream USB PHY without crowbar action. |
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-B24-Q | Same 24 V nominal voltage but ±2 % tolerance (vs. ±5 % for C-series); lower leakage and tighter rdiff | Better suited for precision analog references where tolerance and tempco dominate; less optimized for fast-switching noise reduction | Select B24-Q when absolute voltage accuracy and long-term stability outweigh switching speed requirements |
| MMSZ5245B-7-F | 24 V ±5 %, SOD-123 package (2.7 mm × 1.4 mm), 500 mW Ptot, higher rdiff (300 Ω), not AEC-Q101 qualified | Higher power margin but larger footprint and unqualified for automotive; suitable for industrial/commercial boards only | Choose MMSZ5245B-7-F only if board space allows larger package and automotive qualification is unnecessary |
Compared with BZX58550-B24-Q, the C24-Q trades tighter voltage tolerance for improved switching behavior and lower noise; versus MMSZ5245B-7-F, it offers AEC-Q101 compliance and 55 % smaller footprint at the cost of 40 % lower power rating - making it optimal for space- and qualification-constrained automotive and portable designs.
Availability
BZX58550-C24-QX is available at Aetrix Electronics and suitable for automotive cabin sensors, portable medical monitors, industrial IoT node power rails, and automotive infotainment USB port protection requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for BZX58550-C24-QX 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-qualified components and energy-efficient solutions.
The BZX58550-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, designed specifically for low-current voltage reference and regulation in battery-powered, space-constrained, and automotive-grade electronic systems.
FAQ
What is the maximum reverse voltage before breakdown for BZX58550-C24-QX?
The nominal Zener voltage is 24 V with ±5 % tolerance, meaning guaranteed breakdown occurs between 22.8 V and 25.2 V at IZ = 50 µA. The absolute maximum non-repetitive peak reverse voltage is limited by PZSM = 40 W for 100 µs pulses, corresponding to ~28.3 V at peak surge current. Continuous operation above 25.2 V risks thermal runaway.
Can BZX58550-C24-QX be used in forward-biased mode as a standard diode?
Yes - it exhibits ≤ 0.9 V forward voltage at 10 mA, matching typical silicon diode behavior. However, its primary design intent is reverse-biased Zener operation; forward conduction is specified only for clamping or dual-role protection schemes, not as a rectifier replacement.
How does the "C" suffix differ from "B" in the BZX58550-Q series?
The "C" suffix denotes ±5 % voltage tolerance and intentional minor leakage current optimization for faster switching and reduced noise, per AN90031. The "B" suffix indicates ±2 % tolerance and lower leakage, prioritizing precision over dynamic performance - both share identical package, thermal ratings, and AEC-Q101 qualification.
Is the SOD523 package hand-solderable using standard reflow profiles?
Yes - Nexperia provides a defined reflow soldering footprint (Fig. 10) compatible with standard lead-free profiles (peak 260 °C, 30 s max above 217 °C). The 0.34 mm lead pitch and 0.6 mm height allow reliable placement with 0402-class pick-and-place equipment and visual inspection via cathode band marking.
BZX58550-C24-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Voltage - Zener (Nom) (Vz):
- 24 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 70 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 18.2 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
BZX58550-C24-QX FAQ
1.How can I place an order for BZX58550-C24-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-C24-QX 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-C24-QX reliable?
The price and inventory of BZX58550-C24-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX58550-C24-QX is usually 5 days.
3.What payment methods are accepted for BZX58550-C24-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-C24-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-C24-QX?
BZX58550-C24-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-C24-QX 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-C24-QX?
For technical support, including BZX58550-C24-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-C24-QX requirements.
6.How does Aetrix verify that BZX58550-C24-QX is sourced from the original manufacturer or authorized distributors?
All BZX58550-C24-QX 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-C24-QX meets industry standards.
7.What is the process for return or replacement of BZX58550-C24-QX?
All BZX58550-C24-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-C24-QX, 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-C24-QX part is unused and in its original packaging.
Return procedure for BZX58550-C24-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-C24-QX Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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