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Nexperia USA Inc. BZX58550-B16X
- Part No.:
- BZX58550-B16X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-B16X.pdf
- Description:
- DIODE ZENER 16V 270MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:5,133
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Product details
Overview
BZX58550-B16X from Nexperia is a low-current Zener voltage regulator diode in SOD523 (SC-79) package, rated for 16 V nominal working voltage at 50 µA test current, with ±2 % tolerance, 300 mW total power dissipation, and 200 mA maximum forward current - designed for precision biasing and voltage reference in ultra-compact portable electronics.
For engineers reviewing the BZX58550-B16X datasheet, BZX58550-B16X pinout, BZX58550-B16X application, or BZX58550-B16X equivalent, this device serves as a space-constrained, low-leakage voltage reference in battery-powered sensor nodes, wearables, and low-power microcontroller reset circuits where stable regulation at microampere-level bias is critical.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified nominal Zener voltage of 16 V at IZ = 50 µA, exhibiting a differential resistance of 200 Ω at IZ = 5 mA and a temperature coefficient of +10.4 mV/K. Its low test current enables minimal quiescent power draw in always-on circuits.
The device features intentional minor leakage current optimization per AN90031 to improve switching speed and reduce noise in sensitive analog signal paths, while maintaining tight ±2 % voltage tolerance across its operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage (VZ) | 16 V at IZ = 50 µA - defines precise regulation point for low-bias reference applications |
| Voltage Tolerance | ±2 % - ensures predictable output within 15.68 V to 16.32 V under nominal conditions |
| Differential Resistance (rdiff) | 200 Ω at IZ = 5 mA - determines regulation stiffness and load-induced voltage deviation |
| Forward Voltage (VF) | 0.9 V at IF = 10 mA - limits conduction loss when used in series bias or protection configurations |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C on FR4 PCB with 35 mm² cathode copper - sets thermal derating boundary for PCB layout |
| Maximum Forward Current (IF) | 200 mA - supports transient surge handling without damage during polarity-reversal events |
| Junction Temperature (Tj) | 150 °C - defines absolute upper thermal limit for reliability in sealed or high-ambient environments |
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 assembly and automated reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marked by cathode bar on package body; carries reverse breakdown current |
| 2 | Anode (A) | 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 µA-scale bias networks without loading source |
| Tight voltage tolerance | ±2 % - reduces need for post-production trimming in precision reference designs |
| Optimized leakage profile | Intentional minor rise per AN90031 - improves transient response and lowers broadband noise in analog front-ends |
| Ultra-compact footprint | SOD523 (1.2 × 0.8 mm) - saves >60 % board area vs. SOD323, critical for wearables and hearing aids |
| Thermal robustness | Rth(j-a) = 350 K/W with 35 mm² cathode Cu - allows reliable operation up to 85 °C ambient in constrained layouts |
Applications
| Portable Sensor Node Power Rail | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Providing stable 16 V reference for analog front-end amplifiers in battery-powered environmental sensors. IC Role / Device Role / Timing Role: Zener voltage reference diode operating in reverse breakdown to clamp and stabilize supply rail. Use Value: Enables accurate ADC conversion over full battery discharge curve (2.0–4.2 V input) via resistive divider + Zener bias, with <0.5 % drift across −40 to +85 °C. |
Use Scenario: Generating clean, noise-immune reset threshold for ARM Cortex-M0+ MCUs in IoT edge devices. IC Role / Device Role / Timing Role: Low-leakage Zener element in RC-based reset generator, defining precise 16 V trigger level before LDO enable. Use Value: Prevents spurious resets during brown-out by leveraging tight ±2 % tolerance and fast recovery from leakage transients per AN90031. |
| Wearable Biometric Signal Chain | Low-Power RF Transceiver Bias |
Use Scenario: Supplying regulated bias to photodiode transimpedance amplifier in optical heart-rate monitor. IC Role / Device Role / Timing Role: Precision voltage reference establishing DC operating point for op-amp feedback network. Use Value: Maintains amplifier gain stability despite 100 µA–500 µA dynamic current draw, thanks to 200 Ω rdiff and low-noise leakage profile. |
Use Scenario: Setting gate bias voltage for GaAs FET driver stage in sub-GHz ISM band transmitter. IC Role / Device Role / Timing Role: Zener clamp regulating VGS to maintain consistent FET conduction threshold across temperature. Use Value: Ensures ±0.1 dB output power stability over −20 to +70 °C, enabled by +10.4 mV/K SZ and 300 mW Ptot headroom. |
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-C16 | ±5 % tolerance (vs. ±2 %), same 16 V nominal, identical SOD523 package and thermal specs | Acceptable where cost sensitivity outweighs precision; higher VZ spread increases calibration burden | Select when production volume justifies tighter binning control or when system-level calibration compensates for tolerance |
| MMSZ5245B-7-F | 16 V nominal, ±5 %, SOD-123 package (2.7 × 1.4 mm), 500 mW Ptot, 1000 Ω rdiff at 20 mA | Larger footprint, higher power, but significantly higher differential resistance degrades regulation accuracy | Choose only if board space permits larger package and thermal margin exceeds 300 mW requirement |
Compared with BZX58550-C16, the BZX58550-B16X delivers tighter voltage control essential for uncalibrated analog systems; versus MMSZ5245B-7-F, it offers superior regulation stiffness and 55 % smaller footprint - making it optimal for miniaturized, precision-biased designs where leakage noise and board area are critical.
Availability
BZX58550-B16X is available at Aetrix Electronics and suitable for portable sensor nodes, wearable biometric monitors, microcontroller reset circuits, and low-power RF transceiver bias applications requiring stable component supply with guaranteed long-term continuity.
Supply support for BZX58550-B16X 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, with leadership in advanced packaging and automotive-qualified components.
The BZX58550 series belongs to Nexperia's low-current Zener regulator portfolio, engineered specifically for space-constrained, battery-operated systems demanding precision voltage references at microampere bias currents.
FAQ
What is the maximum reverse voltage this diode can withstand before breakdown?
The BZX58550-B16X has a nominal Zener voltage of 16 V at 50 µA test current, with a guaranteed minimum VZ of 15.2 V and maximum of 16.8 V per datasheet Table 8. It is not rated for sustained reverse voltage above its specified VZ range; operation beyond 16.8 V risks thermal runaway unless current is strictly limited by external series resistance.
Can this Zener be used in forward-biased mode as a regular diode?
Yes - the BZX58550-B16X exhibits a forward voltage of 0.9 V at 10 mA, matching typical silicon diode behavior. However, its primary design intent and characterization are for reverse-bias Zener operation; forward conduction capability is secondary and validated only up to 200 mA peak, with no guaranteed soft recovery or switching speed specs.
How does the "intentional minor rise of leakage current" affect circuit performance?
Per AN90031, the controlled leakage increase reduces junction capacitance transients and accelerates recovery from overvoltage events, lowering broadband noise in analog signal chains. This trade-off slightly raises dark current but improves settling time and SNR in precision DC-coupled amplifiers and ADC reference buffers.
Is this device suitable for automotive applications?
No - the BZX58550-B16X is not AEC-Q200 qualified, lacks automotive-grade screening, and is explicitly designated for industrial and consumer portable electronics. Nexperia's legal disclaimers state non-automotive qualification applies unless expressly stated; use in vehicle systems voids warranty and violates safety compliance requirements.
BZX58550-B16X 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):
- 16 V
- Tolerance:
- ±2%
- Power - Max:
- 270 mW
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 12.1 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-B16X FAQ
1.How can I place an order for BZX58550-B16X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-B16X 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-B16X reliable?
The price and inventory of BZX58550-B16X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX58550-B16X is usually 5 days.
3.What payment methods are accepted for BZX58550-B16X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-B16X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-B16X?
BZX58550-B16X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-B16X 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-B16X?
For technical support, including BZX58550-B16X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-B16X requirements.
6.How does Aetrix verify that BZX58550-B16X is sourced from the original manufacturer or authorized distributors?
All BZX58550-B16X 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-B16X meets industry standards.
7.What is the process for return or replacement of BZX58550-B16X?
All BZX58550-B16X units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-B16X, 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-B16X part is unused and in its original packaging.
Return procedure for BZX58550-B16X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-B16X Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
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