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Nexperia USA Inc. BZX585-C22,115
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- Part No.:
- BZX585-C22,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX585-C22,115.pdf
- Description:
- DIODE ZENER 22V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:13,835
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Product details
Overview
BZX585-C22,115 from Nexperia is a 22 V ±5 % Zener voltage regulator diode in SOD523 (SC-79) surface-mount package, rated for 300 mW total power dissipation and 40 W non-repetitive peak reverse power, used for precision voltage reference and overvoltage protection in low-power analog circuits.
For engineers reviewing the BZX585-C22,115 datasheet, BZX585-C22,115 pinout, BZX585-C22,115 application, or BZX585-C22,115 equivalent, this device serves as a compact, low-capacitance (≤0.05 pF at 1 MHz) Zener solution with 60 Ω typical differential resistance at 5 mA and temperature coefficient of +16.4 mV/K - critical for stable biasing in sensor interfaces and portable power management.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain a stable 22 V reference across load variations, with specified test current IZ = 5 mA and maximum reverse current IR ≤ 0.05 µA at VR = 17.6 V. Its thermal resistance from junction to solder point is 65 K/W, enabling reliable operation on FR4 PCBs with minimal copper area.
The device exhibits a positive temperature coefficient (+16.4 mV/K at IZ = 5 mA), indicating increasing Zener voltage with rising junction temperature - a key consideration for high-accuracy references in thermally variable environments. It supports surge handling up to 1.25 A peak reverse current (tp = 100 µs, square wave).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20.9 V to 23.1 V at IZ = 5 mA - defines stable regulation window for 22 V nominal reference |
| Differential Resistance (rdiff) | 60 Ω typical at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Temperature Coefficient (SZ) | +16.4 mV/K at IZ = 5 mA - quantifies voltage drift per degree Celsius rise in junction temperature |
| Total Power Dissipation (Ptot) | 300 mW at Tamb = 25 °C on FR4 with 35 mm² cathode copper - sets continuous thermal operating limit |
| Non-repetitive Peak Reverse Power (PZSM) | 40 W for tp = 100 µs square wave - enables transient overvoltage clamping without failure |
| Reverse Current (IR) | ≤ 0.05 µA at VR = 17.6 V - ensures minimal leakage below regulation threshold |
| Diode Capacitance (Cd) | ≤ 0.05 pF at f = 1 MHz, VR = 0 V - preserves high-frequency signal integrity in RF-adjacent circuits |
Pinout & Package
SOD523 (SC-79) ultra-small flat-lead plastic package: 1.25 mm × 0.85 mm body, 0.65 mm height, cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal; carries reverse-bias current during regulation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path for Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-compact SMD footprint | SOD523 package (1.25 × 0.85 mm) enables high-density layout in space-constrained wearables and IoT sensors |
| Low dynamic impedance | 60 Ω typical rdiff ensures <1% output deviation under ±1 mA load change at 22 V |
| Controlled temperature behavior | +16.4 mV/K coefficient allows predictable compensation in temperature-stable reference designs |
| High surge robustness | Withstands 40 W transient pulses (100 µs), supporting ESD and inductive kick protection in DC-DC feedback paths |
| Low leakage performance | 0.05 µA max IR at 80% VZ minimizes quiescent current loss in battery-powered voltage monitors |
Applications
| Power Supply Reference | Sensor Biasing |
|---|---|
|
Use Scenario: Providing stable 22 V reference for op-amp comparators in industrial 24 V rail monitoring systems. IC Role / Device Role / Timing Role: Zener diode acts as shunt voltage reference, sinking excess current to maintain fixed node voltage. Use Value: Enables ±1% threshold detection accuracy over −40 °C to +85 °C due to known temperature coefficient and low rdiff. |
Use Scenario: Biasing bridge-based pressure sensors in handheld medical devices powered by single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Supplies precise excitation voltage to sensor Wheatstone bridge, independent of battery voltage sag. Use Value: 0.05 µA leakage ensures >10-year battery life in always-on diagnostic modes while maintaining 22 V stability. |
| Overvoltage Clamp | ADC Input Protection |
|
Use Scenario: Clamping transient spikes on 24 V CAN transceiver power rails in automotive body control modules. IC Role / Device Role / Timing Role: Shunt limiter that conducts only above 22 V, diverting surge energy to ground before IC damage occurs. Use Value: 40 W non-repetitive rating handles ISO 7637-2 pulse 1/2a surges without degradation, validated per 100 µs square-wave test. |
Use Scenario: Protecting 24-bit sigma-delta ADC inputs in precision data acquisition systems from accidental 24 V miswiring. IC Role / Device Role / Timing Role: Front-end clamp limiting input voltage to 22 V, preventing ESD-induced latch-up or gate oxide rupture. Use Value: 0.05 pF capacitance avoids signal distortion or bandwidth reduction in 100 kHz analog front-ends. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX585-B22,115 | ±2 % tolerance (21.56–22.44 V) vs. ±5 % (20.9–23.1 V); identical package and power ratings | Required where tighter regulation tolerance is needed for metrology-grade references | Select BZX585-B22,115 when absolute voltage accuracy outweighs cost sensitivity |
| MMSZ5247B-TP | 22 V ±5 %, SOD-123 package (2.7 × 1.4 mm), 500 mW Ptot, higher rdiff (≥100 Ω) | Suitable for higher-power, less space-constrained designs where thermal margin is prioritized over size | Choose MMSZ5247B-TP when board real estate permits larger footprint and higher continuous dissipation is required |
Compared with BZX585-C22,115, the BZX585-B22,115 offers tighter voltage control at same size and surge capability, while MMSZ5247B-TP trades miniaturization for higher power handling and relaxed impedance - making the C-series optimal for ultra-compact, low-leakage, mid-precision applications.
Availability
BZX585-C22,115 is available at Aetrix Electronics and suitable for voltage reference, overvoltage protection, sensor biasing, and ADC input conditioning requiring stable component supply in high-mix, low-volume production.
Supply support for BZX585-C22,115 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 delivering high-performance logic, discrete, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in consumer, industrial, and communications markets.
The BZX585 series targets general-purpose Zener regulation in space-critical applications, emphasizing ultra-small SOD523 packaging, tight parametric consistency, and robust transient immunity for modern portable and sensor-edge electronics.
FAQ
What is the maximum continuous forward current for BZX585-C22,115?
The device is not rated for continuous forward conduction; its primary function is reverse-bias Zener operation. Absolute maximum forward current is 200 mA per IEC 60134 limiting values, but sustained forward bias exceeds design intent and risks thermal runaway or parameter shift. Use only in reverse breakdown configuration.
Can BZX585-C22,115 be used in series for higher voltage references?
No - Zener diodes in series exhibit cumulative tolerance and temperature coefficient errors, and mismatched dynamic impedances cause uneven voltage division. For >22 V references, use dedicated multi-Zener ICs or precision voltage references with trimmed resistive dividers instead of discrete series stacking.
How does the 65 K/W junction-to-solder-point thermal resistance impact PCB layout?
This value means each watt of dissipated power raises junction temperature 65 °C above the cathode solder joint temperature. To maintain Tj ≤ 150 °C at full 300 mW, keep the cathode pad's solder point ≤ 130.5 °C - achievable with ≥35 mm² of 1-oz copper connected directly to the cathode tab, per Nexperia's thermal test condition.
Is BZX585-C22,115 suitable for automotive applications?
No - this part is not AEC-Q200 qualified and lacks automotive-grade screening, temperature range validation (−40 °C to +125 °C), or stress testing per automotive requirements. Nexperia explicitly states non-automotive qualification in legal disclaimers; use only in commercial or industrial environments.
BZX585-C22,115 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):
- 22 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 55 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 15.4 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
BZX585-C22,115 FAQ
1.How can I place an order for BZX585-C22,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX585-C22,115 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 BZX585-C22,115 reliable?
The price and inventory of BZX585-C22,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX585-C22,115 is usually 5 days.
3.What payment methods are accepted for BZX585-C22,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX585-C22,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX585-C22,115?
BZX585-C22,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX585-C22,115 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 BZX585-C22,115?
For technical support, including BZX585-C22,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX585-C22,115 requirements.
6.How does Aetrix verify that BZX585-C22,115 is sourced from the original manufacturer or authorized distributors?
All BZX585-C22,115 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 BZX585-C22,115 meets industry standards.
7.What is the process for return or replacement of BZX585-C22,115?
All BZX585-C22,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX585-C22,115, 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 BZX585-C22,115 part is unused and in its original packaging.
Return procedure for BZX585-C22,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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