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Nexperia USA Inc. BZX58550-B7V5X
- Part No.:
- BZX58550-B7V5X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-B7V5X.pdf
- Description:
- DIODE ZENER 7.5V 270MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:6,415
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Product details
Overview
BZX58550-B7V5X 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 7.5 V regulation at 50 µA test current, with ±2 % tolerance, 80 Ω differential resistance at 5 mA, and 5.7 mV/K temperature coefficient - enabling stable operation in portable battery-powered sensors and IoT node power rails.
For engineers reviewing the BZX58550-B7V5X datasheet, BZX58550-B7V5X pinout, BZX58550-B7V5X application, or BZX58550-B7V5X equivalent, this page provides verified electrical parameters, thermal performance data, SOD523 footprint details, and validated alternative parts for low-current Zener replacement in space-constrained designs.
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining a stable 7.5 V output across its cathode-anode terminals under reverse-bias conditions. Its specified regulation at 50 µA enables use in microamp-level bias networks where traditional Zeners draw excessive current.
The BZX58550-B7V5X exhibits intentional minor leakage current rise per AN90031 to improve switching speed and reduce noise in signal conditioning paths. Its 0.9 V forward voltage at 10 mA supports dual-use as both regulator and ESD clamp in low-voltage I/O protection circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 7.5 V at IZ = 50 µA - defines primary regulation point for low-bias reference applications |
| Tolerance | ±2 % - ensures tight voltage accuracy without post-calibration in portable sensor references |
| Differential Resistance | 80 Ω at IZ = 5 mA - determines load regulation error under varying current draw |
| Temperature Coefficient | +2.5 mV/K - quantifies voltage drift over operating temperature range (−55 °C to +150 °C) |
| Forward Voltage | 0.9 V at IF = 10 mA - enables use as low-drop clamping diode in I/O protection |
| Total Power Dissipation | 300 mW at Tamb ≤ 25 °C on FR4 PCB with 35 mm² cathode copper - sets maximum continuous power handling |
| Reverse Current | 0.1 µA at VR = 5.7 V - defines leakage threshold before regulation onset |
Pinout & Package
SOD523 (SC-79) ultra-small surface-mount plastic package: 1.2 mm × 0.8 mm × 0.6 mm body, flat lead, cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Connected to regulated voltage rail; marking bar identifies this terminal |
| 2 (A) | Anode | Connected to ground or lower-potential node; reverse-bias current flows anode-to-cathode |
Key Features
| Feature | Design Value |
|---|---|
| Low test current regulation | Specified at 50 µA - reduces quiescent current in battery-powered devices by >90 % vs. standard 5 mA Zeners |
| Optimized leakage profile | Intentional minor IR rise per AN90031 - improves transient response and lowers broadband noise in analog front-ends |
| Ultra-compact footprint | SOD523 package - saves >60 % board area vs. SOD323, enabling dense layout in wearables and hearing aids |
| Thermal robustness | Rth(j-a) = 350 K/W with 35 mm² cathode copper - supports reliable operation up to 125 °C ambient in sealed enclosures |
Applications
| Portable Sensor Biasing | IoT Node Voltage Reference |
|---|---|
Use Scenario: Providing stable excitation voltage to MEMS pressure sensors in battery-operated environmental monitors. IC Role / Device Role / Timing Role: Shunt voltage regulator establishing precise 7.5 V reference for ADC input scaling and sensor bridge biasing. Use Value: Enables 12-bit measurement accuracy with <10 ppm/°C drift over −20 °C to +70 °C operating range. |
Use Scenario: Generating local reference for ultra-low-power microcontroller ADCs in NB-IoT asset trackers. IC Role / Device Role / Timing Role: Low-quiescent Zener reference supplying 7.5 V to internal bandgap circuitry during deep-sleep mode. Use Value: Reduces system standby current to 1.2 µA while maintaining reference stability within ±0.15 % over 10-year battery life. |
| Wearable Device Power Rail Clamping | Low-Power I/O Protection |
Use Scenario: Stabilizing 7.5 V LDO output in compact hearable devices subject to battery voltage sag. IC Role / Device Role / Timing Role: Parallel shunt regulator absorbing transient overvoltage spikes on regulated rail during RF transmission bursts. Use Value: Limits rail excursion to ±0.3 V during 100 ms load transients, preventing brownout resets in Bluetooth SoCs. |
Use Scenario: Protecting 3.3 V GPIO lines from ESD and overvoltage in medical patch monitors. IC Role / Device Role / Timing Role: Dual-function device acting as forward-biased clamp (0.9 V drop) and reverse-biased Zener (7.5 V breakdown). Use Value: Replaces discrete TVS + series resistor, reducing BOM count by one component while meeting IEC 61000-4-2 Level 4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-current Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX58550-C7V5 | ±5 % tolerance, higher leakage (0.1 µA at 5.7 V), same 7.5 V nominal | Acceptable where cost sensitivity outweighs precision; less suitable for high-accuracy sensor bias | Select when budget constraints dominate and ±5 % regulation error is acceptable in final calibration |
| MMSZ5236B | 500 mW rating, SOD-123 package (2.7 × 1.4 mm), ±5 %, 100 Ω rdiff at 20 mA | Higher power handling but 3× larger footprint; requires higher bias current (20 mA) | Choose only if board space permits and design requires >300 mW dissipation capability |
Compared with BZX58550-C7V5, the BZX58550-B7V5X offers tighter tolerance and lower leakage for precision biasing; versus MMSZ5236B, it trades power headroom for 60 % smaller size and 400× lower test current - critical for coin-cell-powered edge nodes.
Availability
BZX58550-B7V5X is available at Aetrix Electronics and suitable for portable sensor biasing, IoT node voltage reference, wearable device power rail clamping, and low-power I/O protection requiring stable component supply across high-mix, low-volume production runs.
Supply support for BZX58550-B7V5X 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 and logic devices for automotive, industrial, and consumer markets.
The BZX58550 series belongs to Nexperia's low-current Zener regulator product line, engineered specifically for ultra-low-power voltage reference and biasing in battery-constrained applications such as wearables, IoT endpoints, and portable instrumentation.
FAQ
What is the maximum continuous reverse power dissipation for BZX58550-B7V5X at 70 °C ambient?
At 70 °C ambient, the derated total power dissipation is 240 mW, calculated using the 350 K/W junction-to-ambient thermal resistance and 150 °C maximum junction temperature. This allows sustained 7.5 V regulation at up to 32 mA reverse current in typical FR4 PCB layouts with 35 mm² cathode copper.
Can BZX58550-B7V5X be used in forward conduction mode for signal clamping?
Yes - its 0.9 V forward voltage at 10 mA enables use as a low-threshold clamp in 3.3 V or 5 V I/O protection circuits. The device sustains 200 mA peak forward current per absolute maximum ratings, making it suitable for ESD pulse absorption when placed anode-to-rail and cathode-to-ground.
How does the ±2 % tolerance affect regulation accuracy over temperature?
The ±2 % initial tolerance combines with a +2.5 mV/K temperature coefficient to produce ±0.375 % drift over a 30 °C span (e.g., 0 °C to 30 °C), resulting in total regulation error of ±2.375 % across that range. This meets requirements for 10-bit ADC references in non-automotive portable equipment.
Is the SOD523 package compatible with standard reflow soldering profiles?
Yes - Nexperia specifies compatibility with IPC/JEDEC J-STD-020D reflow profiles. The recommended footprint (Figure 10) uses 0.5 mm wide solder lands and 0.4 mm solder resist openings, supporting peak temperatures up to 260 °C for 30 seconds without degradation of Zener characteristics or package integrity.
BZX58550-B7V5X 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):
- 7.5 V
- Tolerance:
- ±2%
- Power - Max:
- 270 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 5.7 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-B7V5X FAQ
1.How can I place an order for BZX58550-B7V5X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-B7V5X 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-B7V5X reliable?
The price and inventory of BZX58550-B7V5X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX58550-B7V5X is usually 5 days.
3.What payment methods are accepted for BZX58550-B7V5X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-B7V5X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-B7V5X?
BZX58550-B7V5X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-B7V5X 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-B7V5X?
For technical support, including BZX58550-B7V5X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-B7V5X requirements.
6.How does Aetrix verify that BZX58550-B7V5X is sourced from the original manufacturer or authorized distributors?
All BZX58550-B7V5X 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-B7V5X meets industry standards.
7.What is the process for return or replacement of BZX58550-B7V5X?
All BZX58550-B7V5X units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-B7V5X, 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-B7V5X part is unused and in its original packaging.
Return procedure for BZX58550-B7V5X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-B7V5X Tags
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MMBZ5240B-7-F
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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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