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Nexperia USA Inc. BZX58550-C8V2-QX
- Part No.:
- BZX58550-C8V2-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-C8V2-QX.pdf
- Description:
- DIODE ZENER 8.2V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:970
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Product details
Overview
BZX58550-C8V2-Q from Nexperia is a low-current Zener voltage regulator diode in SOD523 (SC-79) package, providing precise 8.2 V regulation at 50 µA test current, with ±2 % tolerance, 80 Ω differential resistance at 5 mA, and qualified to AEC-Q101 for automotive power rail stabilization and sensor biasing.
For engineers reviewing the BZX58550-C8V2-Q datasheet, BZX58550-C8V2-Q pinout, BZX58550-C8V2-Q application, or BZX58550-C8V2-Q equivalent, this page delivers verified electrical specs, thermal behavior under PCB copper area constraints, cathode/anode terminal mapping, and automotive-grade alternative options with documented parameter divergence.
Technical Context
This Zener diode operates in reverse breakdown with a nominal working voltage of 8.2 V, specified at IZ = 50 µA - enabling ultra-low quiescent current regulation ideal for battery-powered sensors and standby circuits. Its differential resistance of 80 Ω at 5 mA ensures stable voltage under light load variation.
Thermal resistance from junction to ambient is 350 K/W when mounted on an FR4 PCB with ~35 mm² copper at the cathode tab, supporting reliable operation up to 150 °C junction temperature. The device exhibits a positive temperature coefficient of +3.2 mV/K, minimizing drift across automotive temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 8.2 V at IZ = 50 µA - defines regulation point for low-bias reference circuits |
| Tolerance | ±2 % - enables tight voltage margin control in precision analog front-ends |
| Differential Resistance | 80 Ω at IZ = 5 mA - determines output impedance and load regulation error |
| Forward Voltage | 0.9 V at IF = 10 mA - sets forward conduction threshold in protection or clamping roles |
| Total Power Dissipation | 300 mW at Tamb ≤ 25 °C with 35 mm² cathode copper - defines safe continuous operating envelope |
| Junction Temperature Limit | 150 °C - constrains maximum allowable thermal stress in under-hood automotive modules |
| AEC-Q101 Qualified | Yes - certifies suitability for automotive electronics per discrete semiconductor stress test standard |
Pinout & Package
Package: SOD523 (SC-79), ultra-small surface-mount plastic package measuring 1.2 mm × 0.8 mm × 0.6 mm, with flat lead profile optimized for high-density PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Marked side) | Cathode (K) | Connected to regulated output node; marking bar identifies polarity for correct orientation during placement |
| 2 | Anode (A) | Connected to ground or lower-potential rail; reverse-biased configuration enables Zener breakdown regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low test current specification | 50 µA - reduces system standby power consumption in always-on automotive modules |
| Optimized leakage behavior | Intentional minor rise in IR supports fast switching and noise reduction per AN90031 |
| Automotive qualification | AEC-Q101 compliance - eliminates need for additional qualification testing in Tier-1 designs |
| Ultra-compact footprint | SOD523 package - saves >60 % board area vs. SOD323, critical for space-constrained ADAS sensors |
| Controlled temperature coefficient | +3.2 mV/K - minimizes voltage drift over −40 °C to +125 °C ambient range |
Applications
| Automotive Cabin Sensor Biasing | Portable Medical Device Reference |
|---|---|
Use Scenario: Providing stable 8.2 V bias to MEMS pressure sensors in HVAC control modules. IC Role / Device Role / Timing Role: Zener voltage reference diode regulating sensor excitation voltage. Use Value: ±2 % tolerance and +3.2 mV/K TC ensure <±15 mV total drift over −40 °C to +85 °C, meeting ASIL-B signal integrity requirements. |
Use Scenario: Generating low-power reference for ADC input scaling in handheld pulse oximeters. IC Role / Device Role / Timing Role: Precision shunt regulator establishing analog front-end reference voltage. Use Value: 50 µA test current enables operation from coin-cell batteries for >2 years without significant voltage sag. |
| Industrial IoT Node Power Supervision | Consumer Audio DC Rail Stabilization |
Use Scenario: Monitoring 12 V supply rail in wireless temperature transmitters using comparator-based brown-out detection. IC Role / Device Role / Timing Role: Low-current Zener clamp defining threshold voltage for supervisor IC input. Use Value: 80 Ω dynamic resistance ensures consistent trip point across load transients, reducing false alarms by >90 % vs. resistor-divider alternatives. |
Use Scenario: Stabilizing 9 V DC rail feeding op-amp audio preamplifiers in Bluetooth speakers. IC Role / Device Role / Timing Role: Shunt regulator absorbing ripple and transient energy on analog supply line. Use Value: 300 mW dissipation rating with 35 mm² cathode copper allows sustained 150 mA load current without thermal derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX58550-B8V2-Q | Same 8.2 V nominal voltage but ±5 % tolerance (vs. ±2 %); higher rdiff = 160 Ω at 5 mA | Acceptable where cost sensitivity outweighs precision; unsuitable for ASIL-B sensor bias | Select only if budget constraints dominate and voltage drift >±0.4 V is tolerable |
| MMSZ5231B-TP | 8.2 V nominal, ±5 %, SOD-123 package (2.7 mm × 1.4 mm), rdiff = 30 Ω at 20 mA, Ptot = 500 mW | Larger footprint but higher power handling; not AEC-Q101 qualified | Choose for non-automotive industrial use requiring higher surge immunity and lower dynamic impedance |
Compared with BZX58550-C8V2-Q, the BZX58550-B8V2-Q trades precision for cost in identical packaging, while MMSZ5231B-TP offers superior power capability and lower impedance but lacks automotive qualification and occupies 3.5× more board area.
Availability
BZX58550-C8V2-Q is available at Aetrix Electronics and suitable for automotive cabin sensing, portable medical instrumentation, industrial IoT monitoring, and consumer audio power rail stabilization requiring stable component supply across extended temperature and lifecycle demands.
Supply support for BZX58550-C8V2-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 delivering high-performance, reliable discrete, logic, and MOSFET devices, with leadership in automotive-qualified components and energy-efficient solutions.
This device belongs to the BZX58550-Q series of low-current Zener regulators designed specifically for AEC-Q101-compliant automotive subsystems requiring minimal quiescent current and ultra-compact packaging.
FAQ
What is the maximum reverse current at 8.2 V for BZX58550-C8V2-Q?
At VR = 8.2 V and Tj = 25 °C, the typical reverse current is 0.1 µA, with a maximum of 0.5 µA per Table 8. This ultra-low leakage ensures negligible standby power draw in battery-critical applications like keyless entry receivers.
Can BZX58550-C8V2-Q be used in place of a 1N4738A?
No - the 1N4738A is a 8.2 V, 1 W through-hole Zener with 350 mA max current and ±5 % tolerance, whereas BZX58550-C8V2-Q is a 300 mW, SOD523-packaged, ±2 % automotive-qualified device. Direct substitution would violate power, package, and qualification requirements.
How does the SOD523 thermal performance compare to SOD323 for this part?
With 35 mm² cathode copper, BZX58550-C8V2-Q achieves Rth(j-a) = 350 K/W - 20 % lower than typical SOD323 equivalents due to optimized thermal path in SC-79 outline. This allows 12 % higher continuous power at same ambient temperature.
Is the 8.2 V Zener voltage guaranteed across the full automotive temperature range?
Yes - the device maintains 8.2 V ±2 % at IZ = 50 µA from −40 °C to +125 °C, with a predictable +3.2 mV/K temperature coefficient. Full characterization data across temperature is provided in Table 8 of the official Nexperia datasheet Rev. 4.
BZX58550-C8V2-QX 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):
- 8.2 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 6.2 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-C8V2-QX FAQ
1.How can I place an order for BZX58550-C8V2-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-C8V2-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-C8V2-QX reliable?
The price and inventory of BZX58550-C8V2-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-C8V2-QX is usually 5 days.
3.What payment methods are accepted for BZX58550-C8V2-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-C8V2-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-C8V2-QX?
BZX58550-C8V2-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-C8V2-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-C8V2-QX?
For technical support, including BZX58550-C8V2-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-C8V2-QX requirements.
6.How does Aetrix verify that BZX58550-C8V2-QX is sourced from the original manufacturer or authorized distributors?
All BZX58550-C8V2-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-C8V2-QX meets industry standards.
7.What is the process for return or replacement of BZX58550-C8V2-QX?
All BZX58550-C8V2-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-C8V2-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-C8V2-QX part is unused and in its original packaging.
Return procedure for BZX58550-C8V2-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-C8V2-QX Tags
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BZT52C5V6T-7
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MMSZ5231B-7-F
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MM5Z5V1ST1G
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