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Nexperia USA Inc. BZX58550-B3V6X
- Part No.:
- BZX58550-B3V6X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-B3V6X.pdf
- Description:
- DIODE ZENER 3.6V 270MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:8,914
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Product details
Overview
BZX58550-B3V6X 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 3.6 V regulation at 50 µA test current, with ±2 % tolerance, 600 Ω differential resistance at 5 mA, and 2.0 µA max reverse current at 3.0 V, enabling stable operation in portable battery-powered sensors and wearables.
For engineers reviewing the BZX58550-B3V6X datasheet, BZX58550-B3V6X pinout, BZX58550-B3V6X application, or BZX58550-B3V6X equivalent, this page provides verified electrical parameters, thermal behavior under PCB copper area constraints, cathode/anode terminal mapping, and validated alternatives for low-leakage Zener replacement in space-constrained designs.
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining stable output by conducting reverse current above its specified Zener voltage (3.53–3.67 V at 50 µA). Its low 50 µA test current enables accurate regulation in micro-power monitoring circuits where supply current must remain below 100 µA.
The BZX58550-B3V6X exhibits a negative temperature coefficient of −3.5 mV/K and 160 pF junction capacitance at 0 V, making it suitable for DC reference generation rather than high-frequency noise suppression. Its thermal resistance to ambient is 350 K/W when mounted on 35 mm² cathode copper area - critical for derating in sealed enclosures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.53 V to 3.67 V at IZ = 50 µA - defines precise regulation threshold for low-bias analog rails |
| Tolerance | ±2 % - ensures tight voltage accuracy without post-production trimming in production-grade references |
| Differential Resistance (rdiff) | 600 Ω max at IZ = 5 mA - limits regulation error under load variation in sensor bias networks |
| Reverse Current (IR) | 2.0 µA max at VR = 3.0 V - guarantees minimal quiescent drain in battery-critical standby modes |
| Forward Voltage (VF) | 0.9 V max at IF = 10 mA - supports use as polarity indicator or low-drop rectifier in dual-function layouts |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C on FR4 with 35 mm² cathode Cu - sets maximum continuous power in thermally isolated PCB zones |
Pinout & Package
SOD523 (SC-79) plastic surface-mount package: 1.2 mm × 0.8 mm × 0.6 mm body, ultra-small footprint optimized for high-density portable PCBs. Cathode identified by marking bar on package top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; carries reverse current during Zener conduction; requires thermal copper pour for power handling |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms reference return path; no thermal pad requirement |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables stable regulation in nanoampere-bias circuits like CMOS reset monitors |
| Ultra-small SOD523 package | 1.2 mm × 0.8 mm footprint - fits within 0402 land patterns, reducing board area by 60 % vs. SOD323 |
| Controlled leakage performance | 2.0 µA max IR at 3.0 V - prevents excessive battery drain in multi-year IoT endpoint deployments |
| Negative tempco | −3.5 mV/K - compensates for positive tempcos in adjacent circuitry (e.g., op-amp input stages) |
Applications
| Portable Sensor Biasing | Microcontroller Reset Reference |
|---|---|
Use Scenario: Providing stable 3.6 V reference for analog front-end amplifiers in wearable heart-rate monitors powered by coin-cell batteries. IC Role / Device Role / Timing Role: Shunt voltage reference regulating bias voltage for instrumentation amplifier input stage. Use Value: Enables sub-10 µA total system standby current while maintaining <±10 mV reference drift across −20 °C to +70 °C. |
Use Scenario: Generating precise reset threshold for ultra-low-power ARM Cortex-M0+ MCUs in asset trackers. IC Role / Device Role / Timing Role: Zener-based reset supervisor reference element defining brown-out detection level. Use Value: Delivers 3.6 V trigger point with ±72 mV tolerance over temperature, eliminating need for external resistor divider. |
| RF Front-End Local Oscillator Bias | Smart Card Power Management |
Use Scenario: Stabilizing gate voltage of GaAs FETs in 2.4 GHz BLE transceiver LNA stages. IC Role / Device Role / Timing Role: Low-noise DC bias source minimizing phase noise contribution in LO chain. Use Value: 160 pF capacitance and <2 µA leakage prevent RF signal coupling and preserve 30 dBm OIP3 linearity. |
Use Scenario: Regulating 3.3 V supply rail for ISO/IEC 14443 contactless smart card ICs operating from NFC field energy. IC Role / Device Role / Timing Role: Passive voltage clamp limiting peak rail voltage during dynamic coupling events. Use Value: 300 mW power rating withstands 100 µs surge pulses from antenna coupling transients without degradation. |
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-C3V6 | ±5 % tolerance (vs. ±2 %), 1.2 µA max IR at 3.0 V (vs. 2.0 µA) | Acceptable where cost sensitivity outweighs precision; higher leakage may affect multi-year battery life | Select for cost-driven consumer electronics where 3.42–3.78 V regulation range is acceptable |
| MMSZ5226B | Same 3.3 V nominal but ±5 % tolerance; SOD-123 package (2.7 mm × 1.4 mm); 500 mW Ptot | Larger footprint and higher power dissipation unsuitable for wearables; better for industrial PCBs with thermal relief | Choose only when board space allows larger package and higher power margin is required |
Compared with BZX58550-C3V6 and MMSZ5226B, the BZX58550-B3V6X uniquely balances ultra-miniature size, ±2 % accuracy, and sub-2 µA leakage - making it the sole option for space- and current-constrained medical sensor references.
Availability
BZX58550-B3V6X is available at Aetrix Electronics and suitable for portable sensor biasing, microcontroller reset reference, RF front-end local oscillator bias, and smart card power management requiring stable component supply across high-mix, low-volume production runs.
Supply support for BZX58550-B3V6X 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, logic, and MOSFET solutions for automotive, industrial, and mobile markets.
The BZX58550 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for battery-powered applications demanding minimal leakage, tight voltage tolerance, and ultra-small packaging in harsh thermal environments.
FAQ
What is the maximum reverse voltage before breakdown for BZX58550-B3V6X?
The device begins controlled Zener conduction at 3.53 V (minimum specified VZ) under 50 µA test current. It does not have a distinct "breakdown" threshold; instead, it enters regulated conduction gradually above 3.53 V, with differential resistance of 600 Ω ensuring predictable current rise up to 200 mA absolute maximum forward current.
Can BZX58550-B3V6X be used in place of a 3.3 V Zener diode?
No - its nominal regulation voltage is 3.6 V (range 3.53–3.67 V), not 3.3 V. Substituting it for a 3.3 V part would raise the reference level by ~300 mV, potentially violating MCU reset thresholds or ADC reference tolerances. Use BZX58550-B3V3 (3.23–3.37 V) for 3.3 V applications.
How does the SOD523 package affect thermal performance compared to SOD323?
The SOD523's smaller 1.2 mm × 0.8 mm body reduces copper pad area, increasing thermal resistance to ambient by ~40 % versus SOD323. With 35 mm² cathode copper, Rth(j-a) is 350 K/W - requiring strict derating above 25 °C ambient to stay within 300 mW Ptot limit.
Is BZX58550-B3V6X suitable for automotive applications?
No - this device is not AEC-Q200 qualified. Nexperia explicitly states in its legal disclaimers that non-automotive qualified products like BZX58550-B3V6X are unsuitable for safety-critical or life-support systems, including automotive ECUs, ADAS modules, or infotainment power rails.
BZX58550-B3V6X 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):
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
BZX58550-B3V6X FAQ
1.How can I place an order for BZX58550-B3V6X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-B3V6X 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-B3V6X reliable?
The price and inventory of BZX58550-B3V6X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX58550-B3V6X is usually 5 days.
3.What payment methods are accepted for BZX58550-B3V6X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-B3V6X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-B3V6X?
BZX58550-B3V6X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-B3V6X 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-B3V6X?
For technical support, including BZX58550-B3V6X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-B3V6X requirements.
6.How does Aetrix verify that BZX58550-B3V6X is sourced from the original manufacturer or authorized distributors?
All BZX58550-B3V6X 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-B3V6X meets industry standards.
7.What is the process for return or replacement of BZX58550-B3V6X?
All BZX58550-B3V6X units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-B3V6X, 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-B3V6X part is unused and in its original packaging.
Return procedure for BZX58550-B3V6X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-B3V6X 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
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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
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SMAZ12-13-F
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