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Nexperia USA Inc. BZX58550-B3V6-QX
- Part No.:
- BZX58550-B3V6-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-B3V6-QX.pdf
- Description:
- DIODE ZENER 3.6V 270MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:9,295
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Product details
Overview
BZX58550-B3V6-Q from Nexperia is a low-current Zener voltage regulator diode in SOD523 (SC-79) package, designed for precision biasing and voltage reference in space-constrained portable electronics. It delivers a nominal 3.6 V regulation at 50 µA test current, with ±2 % tolerance, 300 mW total power dissipation, and 160 Ω differential resistance at 5 mA - enabling stable operation in battery-powered sensor nodes and automotive microcontroller supply rails.
For engineers reviewing the BZX58550-B3V6-Q datasheet, BZX58550-B3V6-Q pinout, BZX58550-B3V6-Q application, or BZX58550-B3V6-Q equivalent, this page provides verified electrical parameters, AEC-Q101 qualification status, thermal resistance data, cathode/anode terminal mapping, and automotive-grade replacement guidance - all extracted from Nexperia's official Rev. 4 product data sheet dated 6 August 2026.
Technical Context
This device operates as a two-terminal silicon Zener diode optimized for low-bias regulation: it achieves stable reverse breakdown at 3.6 V with minimal leakage (≤0.8 µA at VR = 3.0 V), specified under IZ = 50 µA to support ultra-low-power circuitry. Its −3.5 mV/K temperature coefficient ensures predictable drift across −55 °C to +150 °C ambient range.
The SOD523 package enables high-density PCB layouts while maintaining thermal performance: Rth(j-a) is 350 K/W with 35 mm² copper area at cathode tab, and junction temperature remains ≤150 °C at 300 mW dissipation under defined mounting conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage (VZ) | 3.6 V at IZ = 50 µA - precise reference for low-current bias networks |
| Tolerance | ±2 % - tight regulation for analog sensor excitation and ADC reference stability |
| Differential Resistance (rdiff) | 160 Ω at IZ = 5 mA - low dynamic impedance minimizes output voltage variation under load shifts |
| Forward Voltage (VF) | 0.9 V at IF = 10 mA - enables use as clamping diode in bidirectional protection circuits |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C on FR4 with 35 mm² cathode copper - defines safe continuous operating envelope |
| Junction Temperature (Tj) | 150 °C maximum - supports under-hood automotive environments without derating |
| AEC-Q101 Qualified | Yes - validated for automotive applications including body control modules and infotainment power supplies |
Pinout & Package
Package: SOD523 (SC-79), plastic surface-mounted, 2-lead, 1.2 mm × 0.8 mm × 0.6 mm body. Cathode identified by marking bar.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar indicates this terminal - critical for correct polarity in shunt regulation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-biased path for Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| Low test current specification | Rated at 50 µA - reduces quiescent current in always-on battery circuits, extending shelf life |
| Optimized leakage profile | Controlled IR ≤ 0.8 µA at VR = 3.0 V - prevents unintended loading of high-impedance signal paths |
| Ultra-small footprint | SOD523 package (1.2 × 0.8 mm) - fits within 0402 land patterns, enabling miniaturized wearable PCBs |
| Automotive qualification | AEC-Q101 compliant - qualified for temperature cycling, humidity, and mechanical shock per automotive stress standards |
| Thermal robustness | Rth(j-sp) = 65 K/W - efficient heat transfer from junction to solder point improves reliability in thermally dense layouts |
Applications
| Automotive Body Control Unit (BCU) | Portable Medical Sensor Node |
|---|---|
Use Scenario: Regulating 3.3 V supply rail for LIN transceiver and EEPROM in door module. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable bias to LDO input and MCU reset circuitry. Use Value: ±2 % tolerance and −3.5 mV/K TC ensure <±15 mV output shift over −40 °C to +105 °C, meeting ISO 16750-2 requirements. |
Use Scenario: Supplying excitation voltage to piezoresistive pressure sensor in handheld spirometer. IC Role / Device Role / Timing Role: Precision low-current reference replacing larger 3.6 V TL431-based solution. Use Value: 50 µA test current enables operation from coin-cell battery for >5 years standby, verified via IEC 62304 Class B power budget analysis. |
| Industrial IoT Edge Controller | Consumer Wearable Display Backlight Bias |
Use Scenario: Providing reference voltage for 12-bit SAR ADC measuring 4–20 mA loop current. IC Role / Device Role / Timing Role: Low-noise Zener source feeding ADC reference input and op-amp gain-setting network. Use Value: 160 Ω rdiff limits reference error to <0.1 LSB across full-scale input range, eliminating need for external buffer. |
Use Scenario: Generating stable 3.6 V bias for OLED display gamma correction DAC in smartwatch. IC Role / Device Role / Timing Role: Compact shunt regulator stabilizing charge-pump output under variable display brightness loads. Use Value: SOD523 footprint saves 0.42 mm² vs. SOT23 alternative, directly enabling 1.2 mm reduction in bezel width. |
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-C3V6-Q | ±5 % tolerance (vs. ±2 %), higher max leakage (2.0 µA at VR = 3.0 V) | Acceptable where cost sensitivity outweighs precision; not recommended for ADC references | Select only if BOM cost reduction is prioritized over voltage accuracy and long-term drift stability |
| MMSZ5227B-TP | Same 3.6 V nominal, but ±5 % tolerance and 500 mW Ptot; SOD-123 package (2.7 × 1.4 mm) | Higher power handling suits higher-current biasing; larger footprint incompatible with ultra-dense layouts | Choose when thermal margin >300 mW is required and board space permits 3.8× larger package |
Compared with BZX58550-C3V6-Q, the BZX58550-B3V6-Q offers tighter regulation and lower leakage for precision analog functions; versus MMSZ5227B-TP, it trades power capacity for 65 % smaller footprint and AEC-Q101 qualification - making it optimal for automotive and portable designs where size and reliability are primary constraints.
Availability
BZX58550-B3V6-Q is available at Aetrix Electronics and suitable for automotive body control units, portable medical sensor nodes, industrial IoT edge controllers, and consumer wearable display biasing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZX58550-B3V6-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 mobile markets.
The BZX58550-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for low-power voltage reference and regulation in space-constrained, thermally demanding automotive and portable electronics applications.
FAQ
What is the maximum reverse current (IR) at 3.0 V for BZX58550-B3V6-Q?
The maximum reverse current is 0.8 µA at VR = 3.0 V and Tj = 25 °C, as specified in Table 8 of the Rev. 4 datasheet. This value reflects the device's tight leakage control, critical for preserving battery life in always-on applications such as automotive door modules and wearable sensors.
Can BZX58550-B3V6-Q be used in place of a 3.3 V Zener diode?
No - its nominal Zener voltage is 3.6 V with ±2 % tolerance (3.53 V to 3.67 V), not 3.3 V. Substituting it for a 3.3 V part would cause overvoltage in circuits relying on exact 3.3 V regulation, potentially damaging downstream ICs like 3.3 V logic or ADC references. Use BZX58550-B3V3-Q for 3.3 V applications.
Is the SOD523 package compatible with standard reflow profiles?
Yes - Nexperia specifies compatibility with IPC/JEDEC J-STD-020D reflow profiles. The recommended solder land pattern (Fig. 10) uses 0.5 mm pad width and 2.15 mm center-to-center spacing, and the device withstands peak temperatures up to 260 °C for ≤30 seconds, matching standard lead-free assembly processes.
Does BZX58550-B3V6-Q support bidirectional ESD protection?
No - it is a unidirectional Zener diode rated only for reverse-biased regulation. While forward voltage is 0.9 V at 10 mA, it lacks specified ESD ratings (e.g., IEC 61000-4-2) and is not characterized for transient suppression. For bidirectional protection, pair it with a dedicated TVS diode such as PESD5V0S1BA.
BZX58550-B3V6-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):
- 3.6 V
- Tolerance:
- ±2%
- Power - Max:
- 270 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 7.5 µA @ 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-B3V6-QX FAQ
1.How can I place an order for BZX58550-B3V6-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-B3V6-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-B3V6-QX reliable?
The price and inventory of BZX58550-B3V6-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-B3V6-QX is usually 5 days.
3.What payment methods are accepted for BZX58550-B3V6-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-B3V6-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-B3V6-QX?
BZX58550-B3V6-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-B3V6-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-B3V6-QX?
For technical support, including BZX58550-B3V6-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-B3V6-QX requirements.
6.How does Aetrix verify that BZX58550-B3V6-QX is sourced from the original manufacturer or authorized distributors?
All BZX58550-B3V6-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-B3V6-QX meets industry standards.
7.What is the process for return or replacement of BZX58550-B3V6-QX?
All BZX58550-B3V6-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-B3V6-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-B3V6-QX part is unused and in its original packaging.
Return procedure for BZX58550-B3V6-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-B3V6-QX Tags
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BZT52C5V6T-7
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