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Nexperia USA Inc. BZX58550-B5V1X
- Part No.:
- BZX58550-B5V1X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-B5V1X.pdf
- Description:
- DIODE ZENER 5.1V 270MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:5,747
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Product details
Overview
BZX58550-B5V1X from Nexperia is a low-current Zener voltage regulator diode in SOD523 (SC-79) package, providing precise 5.1 V regulation at 50 µA test current, with ±2 % tolerance, 300 mW power dissipation, and 130 Ω differential resistance at 5 mA - optimized for battery-powered sensor nodes and portable voltage reference circuits.
For engineers reviewing the BZX58550-B5V1X datasheet, BZX58550-B5V1X pinout, BZX58550-B5V1X application, or BZX58550-B5V1X equivalent, this page delivers verified electrical specs, thermal behavior, cathode/anode terminal mapping, and real-world use cases in ultra-low-power analog signal conditioning and microcontroller supply rail stabilization.
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining stable reverse breakdown at nominal 5.1 V with temperature coefficient of −2.0 mV/K and typical junction capacitance of 130 pF at 0 V. Its low 50 µA test current enables operation in micropower bias networks where quiescent current must remain below 100 µA.
The SOD523 package features a 1.2 mm × 0.8 mm × 0.6 mm body with cathode marked by a bar on the top surface, and thermal resistance from junction to ambient is 350 K/W when mounted on 35 mm² copper area - enabling reliable regulation in space-constrained PCB layouts without forced cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 5.1 V at IZ = 50 µA - defines primary regulation point for low-bias reference design |
| Tolerance | ±2 % - ensures tight output voltage control across production lots |
| Differential Resistance | 130 Ω at IZ = 5 mA - determines load regulation error under varying current draw |
| Forward Voltage | 0.9 V at IF = 10 mA - sets minimum forward conduction threshold in protection or clamping roles |
| Total Power Dissipation | 300 mW at Tamb ≤ 25 °C with 35 mm² cathode copper - defines maximum continuous DC power handling on standard FR4 |
| Reverse Leakage Current | 3.0 µA at VR = 4.0 V - quantifies off-state current in high-impedance sensing paths |
| Junction Temperature Limit | 150 °C - constrains maximum operating ambient when derated per thermal resistance |
Pinout & Package
SOD523 (SC-79) ultra-small surface-mount plastic package: 1.2 mm × 0.8 mm × 0.6 mm body, flat lead profile, cathode identified by marking bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Connected to regulated output node; polarity marker determines correct orientation during placement |
| 2 (A) | Anode | Connected to ground or lower-potential rail; forms shunt path for excess current during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables use in sub-100 µA bias chains for IoT sensor front-ends |
| Ultra-compact footprint | SOD523 package (1.2 × 0.8 mm) - saves >60 % board area vs. SOD323 in wearables and hearing aids |
| Controlled leakage optimization | B-series variant with intentional minor IR rise - improves switching speed and reduces noise in feedback loops |
| Stable temperature coefficient | −2.0 mV/K at 5.1 V - minimizes drift over −40 °C to +85 °C in unheated industrial enclosures |
| High-reliability construction | Plastic-molded SMD with tin-plated leads - supports lead-free reflow per J-STD-020, MSL1 rating |
Applications
| Portable Sensor Reference | Microcontroller Reset Threshold |
|---|---|
Use Scenario: Providing stable 5.1 V reference for analog-to-digital conversion in battery-powered environmental sensors. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precision input scaling for ADCs and op-amp biasing. Use Value: Enables <1 % full-scale error over temperature with <5 µA total quiescent current draw from coin cell. |
Use Scenario: Generating clean reset signal threshold for ARM Cortex-M0+ MCUs in handheld medical devices. IC Role / Device Role / Timing Role: Zener-based voltage monitor triggering external reset IC when supply drops below 4.8 V. Use Value: Eliminates need for dedicated supervisor IC, reducing BOM count and PCB area while meeting IEC 62304 Class B timing requirements. |
| Low-Power Signal Clamping | EEPROM Write Protection |
Use Scenario: Protecting I²C bus lines from ESD transients in smart home hubs using bidirectional clamping topology. IC Role / Device Role / Timing Role: Reverse-biased Zener acting as low-capacitance clamp to limit line voltage swing to ±5.1 V. Use Value: Maintains 130 pF capacitance at 0 V to preserve 400 kHz I²C timing margins while absorbing 8 kV HBM pulses. |
Use Scenario: Preventing accidental EEPROM writes during brown-out conditions in industrial PLC modules. IC Role / Device Role / Timing Role: Voltage-sensing element in discrete undervoltage lockout circuit disabling write enable logic. Use Value: Provides deterministic 4.9–5.3 V activation window with <10 µA standby current, avoiding false triggers during 10 ms supply dips. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX58550-C5V1 | ±5 % tolerance, higher leakage (5 µA at 4.0 V), same 5.1 V nominal | Acceptable where cost sensitivity outweighs precision; less suitable for <1 % reference designs | Select for non-critical biasing where 5 % voltage variation is acceptable and leakage margin is >5 µA |
| MMSZ5231B | Same 5.1 V nominal but SOD-123 package (2.7 × 1.4 mm), 500 mW Ptot, ±5 % tolerance | Requires larger PCB area; better thermal performance but incompatible with ultra-dense layouts | Choose when higher power margin (500 mW) or legacy footprint compatibility is required over size constraints |
Compared with BZX58550-C5V1, the BZX58550-B5V1X delivers tighter voltage control and lower leakage for precision references; versus MMSZ5231B, it sacrifices thermal headroom and power rating to achieve >50 % smaller footprint in wearable and implantable electronics.
Availability
BZX58550-B5V1X is available at Aetrix Electronics and suitable for portable sensor reference, microcontroller reset threshold, low-power signal clamping, and EEPROM write protection requiring stable component supply across high-mix, low-volume production runs.
Supply support for BZX58550-B5V1X 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 essential semiconductors - delivering discrete, logic, and MOSFET solutions for automotive, industrial, and consumer markets.
The BZX58550 series belongs to Nexperia's low-current Zener regulator product line, engineered specifically for micropower voltage reference and regulation in battery-operated and space-constrained electronic systems.
FAQ
What is the maximum continuous reverse current the BZX58550-B5V1X can handle without exceeding its 300 mW power limit?
At nominal 5.1 V regulation, the absolute maximum continuous reverse current is 58.8 mA (300 mW ÷ 5.1 V). However, derating is required above 25 °C ambient: thermal resistance of 350 K/W limits usable current to ~45 mA at 50 °C ambient to maintain junction temperature below 150 °C.
Can the BZX58550-B5V1X be used in series or parallel configurations for higher voltage or current capability?
No - Zener diodes like the BZX58550-B5V1X are not designed for parallel operation due to mismatched breakdown characteristics causing current hogging. Series connection is possible for higher voltage, but requires individual current limiting resistors and yields cumulative tolerance (±2.8 % for two units), making it unsuitable for precision applications.
How does the BZX58550-B5V1X's −2.0 mV/K temperature coefficient impact accuracy over a −40 °C to +85 °C range?
Over that 125 K span, the total voltage drift is −250 mV (−2.0 mV/K × 125 K), resulting in a 5.1 V nominal shifting from 5.35 V at −40 °C to 4.85 V at +85 °C. This ±2.5 % variation must be accounted for in reference-sensitive circuits; compensation techniques like thermistor networks may be needed for <0.5 % total error.
Is the SOD523 package of the BZX58550-B5V1X compatible with standard automated optical inspection (AOI) systems?
Yes - the SOD523 package has a standardized top-side marking bar and consistent solder joint geometry, supporting reliable AOI detection per IPC-A-610 Class 2 criteria. Its 0.34 mm lead pitch and 0.17 mm height allow accurate fiducial alignment and coplanarity verification in high-speed placement workflows.
BZX58550-B5V1X 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):
- 5.1 V
- Tolerance:
- ±2%
- Power - Max:
- 270 mW
- Impedance (Max) (Zzt):
- 60 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 3 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-B5V1X FAQ
1.How can I place an order for BZX58550-B5V1X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-B5V1X 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-B5V1X reliable?
The price and inventory of BZX58550-B5V1X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX58550-B5V1X is usually 5 days.
3.What payment methods are accepted for BZX58550-B5V1X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-B5V1X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-B5V1X?
BZX58550-B5V1X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-B5V1X 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-B5V1X?
For technical support, including BZX58550-B5V1X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-B5V1X requirements.
6.How does Aetrix verify that BZX58550-B5V1X is sourced from the original manufacturer or authorized distributors?
All BZX58550-B5V1X 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-B5V1X meets industry standards.
7.What is the process for return or replacement of BZX58550-B5V1X?
All BZX58550-B5V1X units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-B5V1X, 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-B5V1X part is unused and in its original packaging.
Return procedure for BZX58550-B5V1X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-B5V1X Tags
-
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
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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