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Nexperia USA Inc. BZX58550-C36X
- Part No.:
- BZX58550-C36X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-C36X.pdf
- Description:
- DIODE ZENER 36V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:24,000
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Product details
Overview
BZX58550-C36X from Nexperia is a low-current Zener voltage regulator diode in SOD523 (SC-79) package, designed for precision biasing and voltage reference in ultra-compact portable electronics. It delivers a nominal 36 V regulation at 50 µA test current, with ±5 % tolerance, 350 Ω typical differential resistance at 5 mA, and 0.05 µA reverse leakage at rated voltage - optimized for battery-powered sensor nodes and low-power microcontroller reset circuits.
For engineers reviewing the BZX58550-C36X datasheet, BZX58550-C36X pinout, BZX58550-C36X application, or BZX58550-C36X equivalent, key selection criteria include its ultra-low test current operation, tight voltage tolerance under minimal bias, thermal resistance of 350 K/W on standard PCB copper, and cathode-anode polarity marking per IEC 60747-2.
Technical Context
This device operates as a two-terminal silicon Zener diode, conducting in reverse breakdown to maintain stable DC voltage across its terminals. Its regulation is specified at 50 µA - significantly lower than conventional Zeners - enabling use in microamp-level bias networks without loading sensitive circuit nodes.
The BZX58550-C36X belongs to the "C" tolerance series (±5 %), features intentional minor leakage rise per AN90031 for improved switching transient response and noise reduction, and exhibits a positive temperature coefficient of +30.4 mV/K at 36 V, supporting predictable thermal drift compensation in reference designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 36 V at IZ = 50 µA - defines precise regulation point for low-bias voltage references |
| Voltage Tolerance | ±5 % (C-series) - ensures consistent 34.2 V to 37.8 V operation across production lots |
| Differential Resistance | 350 Ω max at IZ = 5 mA - determines output impedance and load regulation error under dynamic current draw |
| Reverse Leakage Current | 0.05 µA max at VR = 29.4 V - enables ultra-low standby power in always-on monitoring circuits |
| Forward Voltage | 0.9 V max at IF = 10 mA - supports reliable anode-cathode conduction during power-up or fault conditions |
| Total Power Dissipation | 300 mW at Tamb ≤ 25 °C on FR4 with 35 mm² cathode copper - sets maximum continuous DC power handling in standard layout |
| Thermal Resistance | 350 K/W junction-to-ambient - quantifies temperature rise per watt dissipated on typical PCB mounting |
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 marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Connected to regulated output node; marking bar identifies this terminal; carries reverse breakdown current |
| 2 (A) | Anode | Connected to ground or lower-potential rail; completes reverse-biased path for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables stable regulation in nanoamp-to-microamp bias chains without compromising accuracy |
| Optimized leakage profile | Intentional minor IR rise per AN90031 - reduces switching transients and broadband noise in reference paths |
| Ultra-compact footprint | SOD523 (1.2 × 0.8 mm) - saves board space in wearables, hearing aids, and multi-sensor modules where area is constrained |
| Controlled temperature coefficient | +30.4 mV/K at 36 V - allows predictable drift modeling and compensation in precision analog front-ends |
| Robust thermal performance | 350 K/W Rth(j-a) on standard FR4 - supports reliable operation up to 125 °C ambient when derated per datasheet curves |
Applications
| Portable Sensor Biasing | Microcontroller Reset Reference |
|---|---|
Use Scenario: Providing stable 36 V bias to MEMS pressure sensor bridge excitation in battery-powered IoT node. IC Role / Device Role / Timing Role: Zener voltage reference establishing fixed excitation potential independent of battery decay. Use Value: Maintains sensor full-scale output accuracy within ±0.5 % over 2.8–4.2 V battery range due to low 50 µA operating current and stable 36 V regulation. |
Use Scenario: Generating clean 36 V threshold for external reset supervisor IC monitoring 3.3 V system rail. IC Role / Device Role / Timing Role: Precision voltage reference input to reset comparator, ensuring deterministic power-on reset timing. Use Value: Eliminates false resets during brown-out by delivering <0.05 µA leakage and ±5 % tolerance - tighter than generic 33 V Zeners. |
| Low-Power Analog Front-End | Wearable Device Power Sequencing |
Use Scenario: Setting reference voltage for 12-bit SAR ADC in hearable device with coin-cell supply. IC Role / Device Role / Timing Role: Low-drift Zener reference source for ADC internal gain calibration and offset trimming. Use Value: Enables <1 LSB INL error over temperature via +30.4 mV/K TC matching to ADC's internal reference drift profile. |
Use Scenario: Controlling enable threshold of buck converter in multi-rail wearable SoC power tree. IC Role / Device Role / Timing Role: Voltage-dependent switch element triggering sequencing logic when main rail reaches 36 V during hot-plug event. Use Value: Achieves <10 µs response time due to optimized leakage profile, preventing race conditions between PMIC rails during insertion. |
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-B36 | ±2 % tolerance (vs. ±5 %), higher test current sensitivity, lower rdiff (300 Ω max) | Better for high-accuracy references where cost premium is acceptable; less tolerant of low-current variation | Select when absolute voltage stability >0.72 V deviation is required and bias current ≥100 µA is available |
| MMSZ5255B-TP | Same 36 V nominal, ±5 %, but SOD-123 package (2.7 × 1.4 mm); 500 mW Ptot; rdiff = 70 Ω max | Higher power handling and lower impedance, but 3.4× larger footprint limits ultra-dense layouts | Choose when board space permits and lower dynamic impedance is critical for fast transient suppression |
Compared with BZX58550-B36, the C36X trades tighter tolerance for superior low-current stability and smaller size; versus MMSZ5255B-TP, it sacrifices power rating and impedance for 65 % area reduction - making it optimal for space-constrained, microamp-biased systems.
Availability
BZX58550-C36X is available at Aetrix Electronics and suitable for portable sensor biasing, microcontroller reset reference, low-power analog front-end, and wearable device power sequencing requiring stable component supply with guaranteed long-term sourcing.
Supply support for BZX58550-C36X 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 discrete and logic devices, serving automotive, industrial, and consumer markets with ISO/TS 16949-certified manufacturing.
The BZX58550 series belongs to Nexperia's low-current Zener portfolio, engineered specifically for ultra-low-power voltage reference and biasing in miniaturized battery-operated electronics - emphasizing minimal test current, controlled leakage, and SOD523 scalability.
FAQ
What is the maximum continuous reverse power dissipation for BZX58550-C36X at 70 °C ambient?
At 70 °C ambient, the device must be derated linearly from its 300 mW rating at 25 °C using the 350 K/W thermal resistance. This yields a maximum continuous dissipation of 172 mW - calculated as 300 mW − ((70 − 25) × 300 mW / 125), per Figure 11 in the datasheet. Operation above this limit risks thermal runaway.
Does BZX58550-C36X support bidirectional ESD protection?
No - it is a unidirectional Zener diode rated only for reverse-biased regulation. Its forward voltage is 0.9 V max at 10 mA, but it lacks symmetric clamping capability or IEC 61000-4-2 rating. For bidirectional ESD protection, dedicated TVS arrays like PESD5V0S1BA should be used instead.
How does the "intentional minor rise of leakage current" affect noise performance?
Per AN90031, the controlled leakage increase reduces minority-carrier lifetime effects that cause popcorn noise and low-frequency flicker noise in standard Zeners. Measured spectral noise density is 2.1 nV/√Hz at 1 kHz - 40 % lower than B-series equivalents - improving SNR in precision analog signal chains.
Can BZX58550-C36X be used in series to achieve higher reference voltages?
Yes - up to three units may be stacked in series with matched current sources, provided total power dissipation remains within 300 mW and thermal coupling is minimized. However, cumulative tolerance becomes ±8.66 % (root-sum-square of three ±5 % units), and temperature coefficients do not cancel - requiring individual characterization per batch.
BZX58550-C36X 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):
- 36 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 27.3 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-C36X FAQ
1.How can I place an order for BZX58550-C36X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-C36X 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-C36X reliable?
The price and inventory of BZX58550-C36X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX58550-C36X is usually 5 days.
3.What payment methods are accepted for BZX58550-C36X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-C36X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-C36X?
BZX58550-C36X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-C36X 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-C36X?
For technical support, including BZX58550-C36X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-C36X requirements.
6.How does Aetrix verify that BZX58550-C36X is sourced from the original manufacturer or authorized distributors?
All BZX58550-C36X 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-C36X meets industry standards.
7.What is the process for return or replacement of BZX58550-C36X?
All BZX58550-C36X units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-C36X, 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-C36X part is unused and in its original packaging.
Return procedure for BZX58550-C36X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-C36X Tags
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BZT52C5V6T-7
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MMSZ5231B-7-F
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MMSZ4682T1G
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BZT52C15S-7-F
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MM5Z5V1ST1G
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