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Nexperia USA Inc. BZX585-B22,115
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- Part No.:
- BZX585-B22,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX585-B22,115.pdf
- Description:
- DIODE ZENER 22V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:1,912
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Product details
Overview
BZX585-B22,115 from Nexperia is a ±2 % tolerance Zener diode in SOD523 (SC-79) package, rated for 22 V nominal Zener voltage at 5 mA, 300 mW total power dissipation, and 40 W non-repetitive peak reverse power. It delivers low differential resistance (60 Ω typ. at IZ = 5 mA) and operates across −65 °C to +150 °C junction temperature, used for precision voltage reference and overvoltage clamping in space-constrained DC power rails.
For engineers reviewing the BZX585-B22,115 datasheet, BZX585-B22,115 pinout, BZX585-B22,115 application, or BZX585-B22,115 equivalent, this page provides verified Zener voltage tolerance, thermal resistance (Rth(j-sp) = 65 K/W), cathode/anode terminal mapping, and direct-fit alternatives for low-power regulation in portable and industrial electronics.
Technical Context
This device functions as a two-terminal voltage reference with sharp reverse breakdown at 22 V ±2 % under 5 mA test current. Its low 60 Ω typical differential resistance ensures stable regulation across load variations, while its negative temperature coefficient (−16.4 mV/K typ. at IZ = 5 mA) enables predictable drift compensation in temperature-sensitive circuits.
The SOD523 package supports high-density PCB layouts with minimal footprint (1.25 mm × 0.85 mm), and its 65 K/W junction-to-solder-point thermal resistance allows reliable operation up to 150 °C junction temperature when mounted on FR4 with 35 mm² copper area at the cathode tab.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 22 V nominal at IZ = 5 mA, ±2 % tolerance - ensures precise reference accuracy in feedback loops and protection thresholds. |
| Differential Resistance (rdiff) | 60 Ω typical at IZ = 5 mA - minimizes output voltage variation under changing load current. |
| Total Power Dissipation (Ptot) | 300 mW at Tamb = 25 °C on FR4 with 35 mm² Cu - defines continuous DC power handling in standard PCB mounting. |
| Non-repetitive Peak Reverse Power (PZSM) | 40 W for tp = 100 µs square wave - supports transient surge suppression without failure. |
| Reverse Current (IR) | 0.05 µA max at VR = 17.6 V - guarantees low leakage in high-impedance bias networks. |
| Junction-to-Solder-Point Thermal Resistance (Rth(j-sp)) | 65 K/W - enables accurate thermal modeling of solder joint temperature rise during pulsed operation. |
| Operating Junction Temperature (Tj) | −65 °C to +150 °C - supports deployment in extended-temperature industrial and automotive-adjacent environments. |
Pinout & Package
SOD523 (SC-79) ultra-small flat-lead surface-mount 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 - critical for correct polarity in shunt regulation. |
| 2 | Anode (A) | Connected to ground or lower-potential rail - completes reverse-biased path enabling Zener conduction. |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener voltage tolerance | Enables tight regulation without post-production trimming in 22 V reference designs. |
| Low 60 Ω differential resistance | Reduces output voltage deviation to <120 mV over 1–10 mA load current swing. |
| 40 W non-repetitive peak power rating | Clamps ESD transients (IEC 61000-4-2 Level 4) without degradation when properly decoupled. |
| 65 K/W junction-to-solder-point thermal resistance | Allows accurate thermal simulation of solder joint temperature during 100 µs surges. |
| −65 °C to +150 °C operating range | Supports use in unheated outdoor enclosures and thermally aggressive motor control PCBs. |
Applications
| Power Supply Voltage Reference | Overvoltage Protection Clamp |
|---|---|
|
Use Scenario: Providing stable 22 V reference for adjustable DC-DC converter feedback divider in battery-powered instrumentation. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise output setpoint via resistor divider network. Use Value: ±2 % VZ tolerance eliminates need for external calibration; 60 Ω rdiff maintains <0.5 % output error across 5–15 mA load changes. |
Use Scenario: Protecting microcontroller I/O pins against 24 V supply rail transients in factory automation sensors. IC Role / Device Role / Timing Role: Passive clamp limiting input voltage to 22 V + forward drop during surge events. Use Value: 40 W PZSM rating absorbs 100 µs, 2 A surges without parametric shift; SOD523 footprint saves board space near connectors. |
| Low-Power Sensor Biasing | Temperature-Compensated Reference |
|
Use Scenario: Biasing a 22 V avalanche photodiode in portable medical pulse oximetry modules. IC Role / Device Role / Timing Role: Constant-voltage bias source maintaining optimal photodiode depletion voltage. Use Value: 0.05 µA max IR at 17.6 V prevents signal corruption in high-impedance analog front-ends. |
Use Scenario: Compensating thermal drift in precision 22 V reference for RTD measurement bridges. IC Role / Device Role / Timing Role: Primary reference element paired with positive-TC component to achieve near-zero net drift. Use Value: −16.4 mV/K temperature coefficient enables matched compensation with 10 kΩ NTC thermistors or PT1000 elements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5248BS-7-F | 22 V ±5 % tolerance, 200 mW Ptot, SOT-323 package (larger footprint) | Higher power derating above 70 °C ambient; less suitable for ultra-dense layouts | Select when cost sensitivity outweighs tolerance and size requirements. |
| BZX384-B22,115 | 22 V ±2 %, same SOD523 package, but 250 mW Ptot and higher rdiff (100 Ω typ.) | Lower surge capability (25 W PZSM) and reduced regulation stability under dynamic loads | Select only if legacy BOM compatibility mandates identical marking or qualification history. |
Compared with MMBZ5248BS-7-F and BZX384-B22,115, the BZX585-B22,115 offers superior regulation stability (60 Ω vs. ≥100 Ω rdiff), higher surge robustness (40 W vs. ≤25 W), and identical ±2 % tolerance in the smallest industry-standard Zener footprint - making it optimal for next-generation compact, high-reliability power management.
Availability
BZX585-B22,115 is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor interfaces, and automotive-adjacent control modules requiring stable component supply and long-term manufacturability.
Supply support for BZX585-B22,115 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, reliable discrete, logic, and MOSFET solutions with focus on efficiency, reliability, and miniaturization.
The BZX585 series belongs to Nexperia's general-purpose Zener diode product line, engineered specifically for space-constrained voltage regulation and transient protection in consumer, industrial, and communications equipment.
FAQ
What is the maximum steady-state current this Zener can handle continuously?
The BZX585-B22,115 supports a maximum continuous forward current of 200 mA per absolute maximum ratings, but its Zener regulation function is specified at 5 mA test current. For sustained shunt regulation, the device must remain within its 300 mW total power dissipation limit - meaning maximum DC Zener current is approximately 13.6 mA at 22 V, assuming no ambient temperature derating.
How does the cathode marking align with the SOD523 package outline?
The cathode is marked by a visible bar on the top surface of the SOD523 package, positioned adjacent to Pin 1. As shown in Figure 11 of the datasheet, the bar runs parallel to the long edge and is centered over the cathode die bond pad - confirming Pin 1 as cathode and Pin 2 as anode in all standard orientation placements.
Can this Zener be used in series for higher voltage references?
Yes - multiple BZX585-B22,115 devices may be connected in series to achieve higher reference voltages (e.g., two in series yield ~44 V), but each device must share current equally via balancing resistors due to ±2 % VZ tolerance; mismatched units will cause unequal voltage division and potential thermal runaway in unbalanced configurations.
Is this part qualified for automotive applications?
No - the BZX585-B22,115 is not AEC-Q200 qualified and lacks automotive-specific testing or stress validation. While its −65 °C to +150 °C operating range overlaps automotive under-hood requirements, Nexperia explicitly states in Section 14 that non-automotive-qualified products are unsuitable for safety-critical or life-support systems without additional customer validation.
BZX585-B22,115 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:
- ±2%
- 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-B22,115 FAQ
1.How can I place an order for BZX585-B22,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX585-B22,115 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-B22,115 reliable?
The price and inventory of BZX585-B22,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX585-B22,115 is usually 5 days.
3.What payment methods are accepted for BZX585-B22,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX585-B22,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX585-B22,115?
BZX585-B22,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX585-B22,115 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-B22,115?
For technical support, including BZX585-B22,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX585-B22,115 requirements.
6.How does Aetrix verify that BZX585-B22,115 is sourced from the original manufacturer or authorized distributors?
All BZX585-B22,115 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-B22,115 meets industry standards.
7.What is the process for return or replacement of BZX585-B22,115?
All BZX585-B22,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX585-B22,115, 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-B22,115 part is unused and in its original packaging.
Return procedure for BZX585-B22,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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