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Nexperia USA Inc. BZX58550-B2V4-QX
- Part No.:
- BZX58550-B2V4-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-B2V4-QX.pdf
- Description:
- DIODE ZENER 2.4V 270MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:5,891
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Product details
Overview
BZX58550-B2V4-QX from Nexperia is a low-current Zener voltage regulator diode in SOD523 (SC-79) package, providing 2.4 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 biasing, automotive microcontroller reference rails, and low-power analog signal conditioning.
For engineers reviewing the BZX58550-B2V4-QX datasheet, BZX58550-B2V4-QX pinout, BZX58550-B2V4-QX application, or BZX58550-B2V4-QX equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance data, and automotive-grade leakage performance per AN90031.
Technical Context
This device operates as a two-terminal shunt voltage reference, maintaining stable reverse breakdown at 2.4 V with differential resistance ≤600 Ω at 50 µA and ≤100 Ω at 1 mA. Its intentional minor leakage rise improves switching speed and noise suppression in low-current bias networks.
Qualified to AEC-Q101, it supports junction temperatures from −55 °C to +150 °C and features thermal resistance from junction to ambient of 460 K/W on standard FR4 PCB - critical for thermally constrained automotive cabin modules and portable IoT edge nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 2.4 V ±2 % at IZ = 50 µA - enables precise low-bias reference for 3.3 V/5 V rail monitoring |
| Forward Voltage | 0.9 V max at IF = 10 mA - ensures minimal drop in series bias paths |
| Total Power Dissipation | 300 mW at Tamb ≤ 25 °C on 35 mm² cathode copper - supports continuous operation in compact automotive PCBs |
| Differential Resistance | ≤600 Ω at 50 µA; ≤100 Ω at 1 mA - maintains regulation stability under varying load currents |
| Reverse Current | ≤2 µA at VR = 1 V - minimizes quiescent drain in always-on vehicle subsystems |
| Temperature Coefficient | −3.5 mV/K - predictable drift behavior for temperature-compensated designs |
| Junction Temperature Range | −55 °C to +150 °C - meets under-hood and infotainment module thermal requirements |
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 - must be routed to higher-potential side in shunt configuration |
| 2 | Anode (A) | Connected to ground or lower-potential reference; completes reverse-biased path for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including body control modules and ADAS sensor interfaces |
| Low test current operation | Specified at 50 µA - enables use in nanoampere-bias circuits without compromising regulation accuracy |
| Optimized leakage profile | Intentional minor IR rise per AN90031 - reduces switching transients and broadband noise in precision references |
| Ultra-compact SOD523 footprint | 1.2 mm × 0.8 mm area - saves board space in multi-rail PMIC supervision and wearable medical sensors |
| Thermal robustness | Rth(j-a) = 460 K/W on standard FR4 - allows reliable operation without thermal vias in cost-sensitive designs |
Applications
| Automotive Cabin Sensor Biasing | Portable Medical Device Reference |
|---|---|
Use Scenario: Providing stable 2.4 V reference for MEMS pressure sensor front-end amplifiers in HVAC control units. IC Role / Device Role / Timing Role: Shunt voltage reference regulating bias current for op-amp input stage. Use Value: ±2 % tolerance and −3.5 mV/K TC ensure <±10 mV drift over −40 °C to +85 °C operating range. |
Use Scenario: Supplying precision reference to ADC in battery-powered pulse oximeter. IC Role / Device Role / Timing Role: Low-current Zener reference replacing larger TL431-based solutions. Use Value: 50 µA test current and 2 µA max IR at 1 V enable >7-year battery life in standby mode. |
| Industrial PLC Analog Input Protection | Smart Meter Voltage Monitoring |
Use Scenario: Clamping and regulating input protection circuitry for 4–20 mA loop receivers. IC Role / Device Role / Timing Role: Overvoltage shunt limiter and precision reference for DAC feedback. Use Value: 300 mW Ptot and 40 W non-repetitive surge rating handle transient surges per IEC 61000-4-5. |
Use Scenario: Monitoring main supply rail integrity in Class 0.5 smart electricity meters. IC Role / Device Role / Timing Role: Reference source for comparator-based undervoltage detection. Use Value: AEC-Q101 qualification and 150 °C Tj rating support long-term reliability in sealed meter enclosures. |
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-C2V4-Q | ±5 % tolerance; higher leakage (≤5 µA at 1 V); same SOD523 package | Suitable for non-critical biasing where cost sensitivity outweighs precision | Select when ±2 % tolerance is unnecessary and BOM cost reduction is prioritized |
| MMSZ4682T1G | 2.4 V ±5 %; 500 mW Ptot; SOD-123 package (2.7 mm × 1.6 mm) | Higher power handling but 3.4× larger footprint - incompatible with ultra-dense layouts | Choose only if thermal margin requires >300 mW dissipation and board space permits larger package |
Compared with BZX58550-C2V4-Q, the BZX58550-B2V4-QX offers tighter regulation and lower leakage for precision analog stages; versus MMSZ4682T1G, it trades power headroom for 65 % smaller PCB area and AEC-Q101 compliance - making it optimal for space-constrained automotive and portable electronics.
Availability
BZX58550-B2V4-QX is available at Aetrix Electronics and suitable for automotive cabin electronics, portable medical instrumentation, industrial PLC analog inputs, and smart meter voltage monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZX58550-B2V4-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 delivering high-performance, reliable discrete, logic, and MOSFET devices with focus on efficiency, miniaturization, and automotive-grade quality.
The BZX58550-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for low-power, high-stability voltage regulation in automotive and portable electronics where size, leakage, and thermal performance are critical.
FAQ
What is the maximum reverse voltage the BZX58550-B2V4-QX can withstand before breakdown?
The device is rated for nominal Zener voltage of 2.4 V ±2 % at 50 µA test current. Its absolute maximum reverse voltage is not specified independently - operation beyond VZ + tolerance induces uncontrolled conduction. The limiting value table confirms non-repetitive peak reverse power dissipation up to 40 W for 100 µs pulses, but sustained reverse bias must remain within the 2.35–2.45 V range for stable regulation.
Does the BZX58550-B2V4-QX require a series resistor in all applications?
Yes - as a shunt regulator, it requires an external current-limiting resistor to set the operating point between minimum knee current (typically ~1 µA) and maximum rated current (200 mA). For 50 µA operation from a 5 V supply, a 52 kΩ resistor establishes proper bias while keeping power dissipation within 300 mW limits on standard FR4 PCB.
How does the "intentional minor rise of leakage current" benefit circuit performance?
Per AN90031, this controlled increase in reverse leakage (e.g., ≤2 µA at 1 V for B-series) reduces minority-carrier storage time, enabling faster turn-off during transient events and lowering high-frequency noise generation - particularly beneficial in precision ADC reference buffers and fast-switching sensor interfaces where low EMI is critical.
Can BZX58550-B2V4-QX replace older BZX585xx or BZX79 parts in existing designs?
No direct drop-in replacement: BZX58550-B2V4-QX uses SOD523 (1.2 mm × 0.8 mm), whereas BZX79 is DO-35 (4.5 mm × 2.5 mm) and legacy BZX585xx may use SOD-123. Electrical characteristics differ - BZX58550 specifies at 50 µA (vs. 5 mA for BZX79), yielding lower dynamic impedance at microampere bias but requiring layout revision for footprint and thermal relief.
BZX58550-B2V4-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX58550-Q
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 2.4 V
- Tolerance:
- ±2%
- Power - Max:
- 270 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 1 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-B2V4-QX FAQ
1.How can I place an order for BZX58550-B2V4-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-B2V4-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-B2V4-QX reliable?
The price and inventory of BZX58550-B2V4-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-B2V4-QX is usually 5 days.
3.What payment methods are accepted for BZX58550-B2V4-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-B2V4-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-B2V4-QX?
BZX58550-B2V4-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-B2V4-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-B2V4-QX?
For technical support, including BZX58550-B2V4-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-B2V4-QX requirements.
6.How does Aetrix verify that BZX58550-B2V4-QX is sourced from the original manufacturer or authorized distributors?
All BZX58550-B2V4-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-B2V4-QX meets industry standards.
7.What is the process for return or replacement of BZX58550-B2V4-QX?
All BZX58550-B2V4-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-B2V4-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-B2V4-QX part is unused and in its original packaging.
Return procedure for BZX58550-B2V4-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-B2V4-QX 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
-
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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