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Nexperia USA Inc. BZX58550-B7V5-QX
- Part No.:
- BZX58550-B7V5-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-B7V5-QX.pdf
- Description:
- DIODE ZENER 7.5V 270MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:6,888
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Product details
Overview
BZX58550-B7V5-Q 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, 300 mW power dissipation, and AEC-Q101 qualification for automotive load-dump protection and sensor biasing.
For engineers reviewing the BZX58550-B7V5-Q datasheet, BZX58550-B7V5-Q pinout, BZX58550-B7V5-Q application, or BZX58550-B7V5-Q equivalent, this page delivers verified Zener voltage, differential resistance, thermal resistance, reverse leakage, and automotive qualification status - critical for low-power rail stabilization in battery-powered ECUs and IoT sensor nodes.
Technical Context
This device operates as a two-terminal shunt regulator, maintaining stable 7.5 V output across 50 µA to 5 mA reverse bias current, with low 80 Ω differential resistance at IZ = 5 mA and +2.5 mV/K temperature coefficient ensuring predictable drift over −55 °C to +150 °C ambient range.
Its ultra-small SOD523 footprint (1.2 mm × 0.8 mm × 0.6 mm) and cathode-marked anisotropic package support high-density PCB layouts, while AEC-Q101 qualification confirms robustness against mechanical shock, temperature cycling, and humidity exposure required for under-hood automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 7.35 V to 7.65 V at IZ = 50 µA - tight ±2 % tolerance enables precise reference generation in low-bias circuits |
| Differential Resistance rdiff | 80 Ω max at IZ = 5 mA - ensures minimal output voltage shift under dynamic load changes |
| Reverse Current IR | 0.1 µA max at VR = 5.7 V - ultra-low leakage preserves battery life in always-on monitoring systems |
| Forward Voltage VF | 0.9 V max at IF = 10 mA - supports efficient polarity-check or ESD clamp integration without excessive forward drop |
| Total Power Dissipation Ptot | 300 mW at Tamb ≤ 25 °C on FR4 with 35 mm² cathode copper - defines safe continuous operating envelope for compact thermal design |
| Junction Temperature Tj | −55 °C to +150 °C - validated operation across full automotive under-hood temperature range |
| AEC-Q101 Qualified | Yes - certified for automotive discrete semiconductor stress testing including HTGB, HTRB, and TC1000 |
Pinout & Package
SOD523 (SC-79) plastic surface-mounted package: 2-pin, ultra-compact 1.2 mm × 0.8 mm × 0.6 mm body with cathode band marking on terminal 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marked by bar on package; carries reverse bias current during regulation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes Zener conduction path when reverse voltage exceeds VZ |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables regulation in micro-power sensor interfaces where supply current must stay below 100 µA |
| Optimized leakage profile | Intentional minor rise in IR per AN90031 - reduces switching noise and improves transient response in fast-switching regulators |
| Automotive-grade reliability | AEC-Q101 qualified - meets stress test requirements for automotive electronics including temperature cycling and high-temperature reverse bias |
| Ultra-small footprint | SOD523 package - saves >60 % board area vs. SOT23, enabling placement near space-constrained ICs like CAN transceivers or ADC references |
| Stable temperature coefficient | +2.5 mV/K at 7.5 V - predictable positive drift allows accurate compensation in temperature-sensitive analog front-ends |
Applications
| Automotive Sensor Biasing | Portable Medical Device Reference |
|---|---|
Use Scenario: Providing stable 7.5 V bias to MEMS pressure sensors in engine control units under wide temperature and vibration conditions. IC Role / Device Role / Timing Role: Shunt voltage reference regulating sensor excitation rail; no timing function. Use Value: Tight ±2 % VZ tolerance and AEC-Q101 qualification ensure consistent sensor output accuracy across −40 °C to +125 °C engine bay operation. |
Use Scenario: Generating precision reference voltage for analog front-end of handheld blood glucose meters powered by coin-cell batteries. IC Role / Device Role / Timing Role: Low-current Zener reference stabilizing ADC reference input; no timing function. Use Value: 50 µA test current and 0.1 µA max leakage at 5.7 V extend battery life beyond 2 years in intermittent-use diagnostic devices. |
| IoT Node Power Rail Clamp | Industrial PLC Input Protection |
Use Scenario: Clamping 3.3 V logic rail against ESD and line transients in battery-operated LoRaWAN sensor nodes. IC Role / Device Role / Timing Role: Transient voltage suppressor acting as shunt clamp; no timing function. Use Value: 80 Ω rdiff and 300 mW Ptot enable fast clamping with minimal overshoot during 8 kV contact discharge events. |
Use Scenario: Protecting 24 V digital input channels in programmable logic controllers from field-wiring surges and inductive kickback. IC Role / Device Role / Timing Role: Overvoltage clamp limiting input voltage to safe levels for downstream optocouplers; no timing function. Use Value: 150 °C max junction temperature and 440 mW peak dissipation capability sustain repeated 100 µs surge events without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX58550-C7V5-Q | ±5 % tolerance (7.13–7.88 V), higher leakage (0.1 µA at 5.7 V vs. same), identical package and thermal specs | Acceptable where tighter regulation not required; lower cost for non-critical bias rails | Select for cost-sensitive industrial controls where ±5 % VZ meets system margin |
| MMSZ5236B-7-F | Same 7.5 V nominal, ±5 % tolerance, SOD-123 package (2.7 mm × 1.4 mm), 500 mW Ptot, no AEC-Q101 rating | Larger footprint, higher power handling, but unqualified for automotive use | Choose only for non-automotive applications requiring higher surge energy absorption |
Compared with BZX58550-C7V5-Q, the BZX58550-B7V5-Q offers tighter regulation and lower leakage for precision biasing; versus MMSZ5236B-7-F, it trades off power capacity for AEC-Q101 compliance and 44 % smaller board area - making it optimal for space- and reliability-constrained automotive modules.
Availability
BZX58550-B7V5-Q is available at Aetrix Electronics and suitable for automotive sensor biasing, portable medical device references, IoT node rail clamping, and industrial PLC input protection requiring stable component supply with guaranteed long-term continuity.
Supply support for BZX58550-B7V5-Q 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.
BZX58550-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for low-current, high-reliability voltage regulation in space-constrained automotive and portable electronics.
FAQ
What is the maximum reverse voltage before breakdown for BZX58550-B7V5-Q?
The nominal Zener voltage is 7.5 V with a tolerance of ±2 %, meaning breakdown occurs between 7.35 V and 7.65 V at IZ = 50 µA. The absolute maximum non-repetitive peak reverse voltage is limited by PZSM = 40 W for 100 µs pulses, but sustained operation above 7.65 V risks exceeding power limits and thermal runaway.
Can BZX58550-B7V5-Q be used in place of a standard 1N4733A?
No - the 1N4733A is a 500 mW, 5.1 V Zener in DO-41 package with ±5 % tolerance and no automotive qualification. BZX58550-B7V5-Q has different voltage (7.5 V), lower power (300 mW), ultra-small SOD523 package, ±2 % tolerance, and AEC-Q101 rating; direct substitution would require circuit redesign for voltage level, layout, and thermal management.
How does the "intentional minor rise of leakage current" affect circuit performance?
Per AN90031, this controlled increase in reverse leakage (e.g., 0.1 µA at 5.7 V) reduces high-frequency noise and improves transient response during fast voltage transitions, making the diode more effective in low-noise analog references and switching regulator feedback paths - without compromising DC regulation accuracy.
Is thermal derating required above 25 °C ambient?
Yes - total power dissipation drops from 300 mW at Tamb ≤ 25 °C to 270 mW at Tamb = 25 °C on standard FR4, and further to 440 mW only with 1 cm² cathode copper pad. Derating follows Rth(j-a) = 350 K/W (with 35 mm² Cu), requiring linear reduction of Ptot by ~2.1 mW/°C above 25 °C to maintain Tj ≤ 150 °C.
BZX58550-B7V5-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):
- 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
BZX58550-B7V5-QX FAQ
1.How can I place an order for BZX58550-B7V5-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-B7V5-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-B7V5-QX reliable?
The price and inventory of BZX58550-B7V5-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-B7V5-QX is usually 5 days.
3.What payment methods are accepted for BZX58550-B7V5-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-B7V5-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-B7V5-QX?
BZX58550-B7V5-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-B7V5-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-B7V5-QX?
For technical support, including BZX58550-B7V5-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-B7V5-QX requirements.
6.How does Aetrix verify that BZX58550-B7V5-QX is sourced from the original manufacturer or authorized distributors?
All BZX58550-B7V5-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-B7V5-QX meets industry standards.
7.What is the process for return or replacement of BZX58550-B7V5-QX?
All BZX58550-B7V5-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-B7V5-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-B7V5-QX part is unused and in its original packaging.
Return procedure for BZX58550-B7V5-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-B7V5-QX Tags
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