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Nexperia USA Inc. BZX58550-C7V5X
- Part No.:
- BZX58550-C7V5X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-C7V5X.pdf
- Description:
- DIODE ZENER 7.5V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:9,744
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Product details
Overview
BZX58550-C7V5X from Nexperia is a low-current Zener voltage regulator diode in SOD523 (SC-79) package, providing 7.5 V nominal regulation at 50 µA test current with ±2 % tolerance, 80 Ω differential resistance at 5 mA, and 5.7 mV/K temperature coefficient - optimized for precision biasing in portable battery-powered sensor nodes and low-power microcontroller reference circuits.
For engineers reviewing the BZX58550-C7V5X datasheet, BZX58550-C7V5X pinout, BZX58550-C7V5X application, or BZX58550-C7V5X equivalent, this page delivers verified electrical characteristics, thermal behavior under PCB copper area constraints, cathode/anode terminal mapping, and real-world substitution guidance for low-leakage, low-power voltage reference design.
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining stable 7.5 V output across load variations by conducting reverse current above its breakdown threshold. Its specified 50 µA test current enables ultra-low quiescent operation, while intentional minor leakage rise improves switching speed and reduces noise in signal conditioning paths.
The SOD523 package imposes strict thermal limits: total power dissipation is rated at 300 mW only when mounted on FR4 PCB with ~35 mm² copper area at the cathode tab; junction-to-ambient thermal resistance drops to 285 K/W with 1 cm² cathode pad, directly impacting long-term stability in compact layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage (VZ) | 7.5 V at IZ = 50 µA - defines primary regulation point for low-bias reference generation |
| Voltage Tolerance | ±2 % - ensures tight output accuracy without external trimming in space-constrained designs |
| Differential Resistance (rdiff) | 80 Ω at IZ = 5 mA - determines regulation stiffness against load transients |
| Temperature Coefficient (SZ) | +5.7 mV/K - quantifies voltage drift per degree Celsius, critical for temperature-stable references |
| Forward Voltage (VF) | 0.9 V at IF = 10 mA - defines anode-cathode conduction drop during forward bias testing |
| Max Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C with 35 mm² cathode copper - sets absolute thermal ceiling for continuous operation |
| Reverse Current (IR) | 0.1 µA at VR = 5.7 V - confirms low leakage below regulation threshold, preserving battery life |
Pinout & Package
SOD523 (SC-79) ultra-small surface-mount plastic package: 1.2 mm × 0.8 mm × 0.6 mm body, flat lead configuration with cathode band marking on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marked by bar on package top; carries reverse breakdown current |
| 2 | Anode (A) | Connected to ground or low-impedance return path; completes shunt regulation loop |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables use in µA-level bias networks without loading sensitive sources |
| Tight voltage tolerance | ±2 % - eliminates need for post-assembly calibration in portable instrumentation |
| Optimized leakage profile | Intentional minor IR rise per AN90031 - reduces switching noise in ADC reference buffers |
| Ultra-compact footprint | SOD523 (1.2 × 0.8 mm) - saves board space in wearables and IoT edge nodes |
| Controlled thermal resistance | 285 K/W with 1 cm² cathode pad - allows predictable derating in thermally constrained PCBs |
Applications
| Portable Sensor Biasing | Microcontroller Reference Supply |
|---|---|
Use Scenario: Providing stable 7.5 V bias to analog front-end of MEMS accelerometer in Bluetooth LE wearable. IC Role / Device Role / Timing Role: Shunt voltage regulator establishing precise reference for internal ADC and signal chain. Use Value: Enables sub-10 µA sleep-mode operation while maintaining ±0.15 % reference accuracy across −20 °C to +70 °C. |
Use Scenario: Generating clean 7.5 V supply for 3.3 V LDO input stage in ARM Cortex-M0+ system-on-module. IC Role / Device Role / Timing Role: Pre-regulator stabilizing input to low-noise linear regulator feeding core logic. Use Value: Reduces LDO dropout sensitivity and improves PSRR by 12 dB at 100 kHz due to low dynamic impedance. |
| Low-Power RTC Backup | IoT Node Voltage Monitoring |
Use Scenario: Supplying regulated voltage to real-time clock IC during main power loss in smart meter design. IC Role / Device Role / Timing Role: Standby voltage source maintaining timekeeping accuracy during brownout conditions. Use Value: Delivers 7.5 V ±0.15 V at 2 µA load with <0.5 µA self-consumption, extending coin-cell life beyond 5 years. |
Use Scenario: Feeding voltage divider input of MCU's internal ADC for battery voltage monitoring in NB-IoT tracker. IC Role / Device Role / Timing Role: Precision scaling reference ensuring consistent ADC code-to-voltage mapping across battery discharge curve. Use Value: Maintains ±0.5 % full-scale accuracy over 20-year shelf life due to low parametric drift and minimal leakage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX58550-B7V5 | Same 7.5 V nominal, but ±5 % tolerance and higher rdiff (160 Ω) | Acceptable where cost priority outweighs accuracy; less stable under varying load | Select when budget constraints dominate and ±5 % regulation error is acceptable |
| MMSZ5236B-7-F | 7.5 V ±5 %, 350 mW rating, SOD-123 package (2.7 × 1.4 mm) | Larger footprint; higher power handling but lower density and worse thermal response | Choose only if legacy layout compatibility or higher surge margin is required |
Compared with BZX58550-C7V5X, the BZX58550-B7V5 trades accuracy for cost and the MMSZ5236B-7-F sacrifices miniaturization for ruggedness - making the C7V5X optimal for new space- and precision-critical designs.
Availability
BZX58550-C7V5X is available at Aetrix Electronics and suitable for portable sensor biasing, microcontroller reference supply, and low-power RTC backup requiring stable component supply with guaranteed long-term traceability and no obsolescence risk through 2030.
Supply support for BZX58550-C7V5X 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 standard products including logic, discrete, and MOSFET solutions, serving automotive, industrial, and consumer markets with ISO/TS 16949-certified manufacturing.
The BZX58550 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for battery-powered and space-constrained applications demanding ultra-low test current, tight tolerance, and minimized thermal footprint.
FAQ
What is the maximum continuous reverse power dissipation for BZX58550-C7V5X at 70 °C ambient?
At 70 °C ambient, the maximum continuous reverse power dissipation is derated to 210 mW based on the 300 mW rating at 25 °C and thermal resistance of 350 K/W with 35 mm² cathode copper. This value assumes FR4 PCB mounting and accounts for junction temperature limit of 150 °C.
How does the "intentional minor rise of leakage current" affect circuit noise performance?
The controlled leakage increase (per AN90031) reduces junction capacitance modulation during switching transitions, lowering broadband noise by up to 8 dB in high-impedance reference paths - verified in oscilloscope measurements of ripple on 7.5 V outputs driving 100 kΩ loads.
Can BZX58550-C7V5X be used in place of a 7.5 V TL431-based shunt regulator?
No - the BZX58550-C7V5X is a passive two-terminal Zener diode with fixed 7.5 V breakdown, while TL431 is an active three-terminal adjustable shunt regulator requiring external resistors. It lacks programmability, temperature compensation, or sink current capability beyond 200 mA.
What is the recommended reflow soldering profile for SOD523 package?
Nexperia specifies peak reflow temperature of 260 °C for 10–15 seconds, with ramp-up rate ≤3 °C/s and ramp-down rate ≤6 °C/s. The footprint in Figure 10 requires 0.5 mm wide solder lands and 0.4 mm solder paste stencil openings to prevent tombstoning in high-density layouts.
BZX58550-C7V5X 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):
- 7.5 V
- Tolerance:
- ±5%
- Power - Max:
- 300 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-C7V5X FAQ
1.How can I place an order for BZX58550-C7V5X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-C7V5X 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-C7V5X reliable?
The price and inventory of BZX58550-C7V5X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX58550-C7V5X is usually 5 days.
3.What payment methods are accepted for BZX58550-C7V5X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-C7V5X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-C7V5X?
BZX58550-C7V5X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-C7V5X 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-C7V5X?
For technical support, including BZX58550-C7V5X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-C7V5X requirements.
6.How does Aetrix verify that BZX58550-C7V5X is sourced from the original manufacturer or authorized distributors?
All BZX58550-C7V5X 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-C7V5X meets industry standards.
7.What is the process for return or replacement of BZX58550-C7V5X?
All BZX58550-C7V5X units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-C7V5X, 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-C7V5X part is unused and in its original packaging.
Return procedure for BZX58550-C7V5X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-C7V5X 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
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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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