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Nexperia USA Inc. BZX585-B11,115
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- Part No.:
- BZX585-B11,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX585-B11,115.pdf
- Description:
- DIODE ZENER 11V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:2,735
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Product details
Overview
BZX585-B11,115 from Nexperia is a 11 V ±2 % Zener voltage regulator diode in SOD523 (SC-79) ultra-small SMD 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 space-constrained consumer and industrial power rails.
For engineers reviewing the BZX585-B11,115 datasheet, BZX585-B11,115 pinout, BZX585-B11,115 application, or BZX585-B11,115 equivalent, key selection criteria include Zener voltage tolerance (±2 %), differential resistance (25 Ω at IZ = 5 mA), thermal resistance (65 K/W junction-to-solder point), and SC-79 package compatibility with high-density PCB layouts.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable 11 V regulation across 5 mA test current, with low 25 Ω typical differential resistance ensuring minimal voltage shift under load variation. Its temperature coefficient of +5.4 mV/K at IZ = 5 mA supports predictable drift behavior in ambient ranges from −65 °C to +150 °C.
The device features two-terminal construction with cathode-marked anode-cathode polarity, optimized for low-capacitance (0.1 pF at VR = 0 V, f = 1 MHz) and fast transient response in clamping circuits. It complies with IEC 60134 absolute maximum ratings, including 200 mA forward current limit and 40 W surge capability at tp = 100 µs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 10.78 V to 11.22 V at IZ = 5 mA - tight ±2 % tolerance enables accurate 11 V reference without trimming |
| Differential Resistance (rdiff) | 25 Ω typ. at IZ = 5 mA - low impedance ensures stable regulation under varying load currents |
| Power Dissipation (Ptot) | 300 mW at Tamb = 25 °C on FR4 PCB with 35 mm² copper - defines continuous thermal operating envelope |
| Non-repetitive Peak Power (PZSM) | 40 W at tp = 100 µs square wave - supports transient overvoltage suppression in surge events |
| Reverse Current (IR) | 0.1 µA max. at VR = 8.8 V - guarantees low leakage in standby and battery-powered modes |
| Junction-to-Solder-Point Rth | 65 K/W - enables effective heat transfer to PCB copper, critical for reliability in compact designs |
| Capacitance (Cd) | 0.1 pF at f = 1 MHz, VR = 0 V - negligible signal loading in high-frequency bias/reference networks |
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 indicated by marking bar on terminal 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; reverse-biased operation requires anode at lower voltage than cathode |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-compact SOD523 footprint | Enables placement in <1.1 mm² board area - ideal for wearables, IoT sensors, and miniaturized power modules |
| ±2 % Zener voltage tolerance | Reduces need for post-assembly calibration in 11 V reference applications such as ADC biasing and LDO feedback |
| Low 25 Ω differential resistance | Maintains regulation stability across ±1 mA load variation - critical for noise-sensitive analog subsystems |
| 65 K/W junction-to-solder-point thermal resistance | Allows >200 mW sustained power handling on standard FR4 with minimal copper - simplifies thermal design |
| 0.1 pF junction capacitance | Minimizes high-frequency coupling in RF bias networks and clock generator references |
Applications
| USB Port Overvoltage Protection | Microcontroller Reset Circuit Reference |
|---|---|
|
Use Scenario: Clamps transient surges on 5 V USB VBUS lines during hot-plug or ESD events. IC Role / Device Role / Timing Role: Zener clamp placed between VBUS and ground, conducting above 11 V to shunt excess energy. Use Value: 40 W non-repetitive peak power rating absorbs IEC 61000-4-2 level 4 ESD pulses without degradation. |
Use Scenario: Provides stable 11 V reference for RC-based reset timing in 3.3 V microcontrollers. IC Role / Device Role / Timing Role: Reverse-biased Zener supplies precise threshold voltage to reset supervisor IC input. Use Value: ±2 % tolerance and 25 Ω rdiff ensure reset assertion within ±1.5 % voltage window across temperature. |
| Industrial Sensor Signal Conditioning | Low-Power Battery Monitor Reference |
|
Use Scenario: Stabilizes excitation voltage for bridge-based pressure/temperature sensors in 24 V systems. IC Role / Device Role / Timing Role: Shunt regulator maintaining constant 11 V across sensor Wheatstone bridge. Use Value: 0.1 µA max. IR at 8.8 V minimizes quiescent current drain in always-on monitoring nodes. |
Use Scenario: Supplies reference voltage to comparator in Li-ion battery voltage monitor circuit. IC Role / Device Role / Timing Role: Zener sets upper threshold for 4.2 V cell overvoltage detection via resistor divider. Use Value: +5.4 mV/K temperature coefficient enables predictable compensation of battery voltage drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5232BS-7-F | 11 V ±5 %, SOT-323 package (1.7 mm × 1.3 mm), 200 mW Ptot, 30 Ω rdiff | Larger footprint and looser tolerance reduce suitability for high-precision, space-constrained designs | Select when cost sensitivity outweighs size and accuracy requirements |
| BZX384-B11,115 | 11 V ±2 %, SOD-323 package (1.7 mm × 1.25 mm), 300 mW Ptot, 30 Ω rdiff | 25 % larger footprint and higher 350 K/W junction-to-ambient resistance limit thermal performance | Prefer only if existing layout accommodates SOD-323 and thermal margin exceeds 100 °C/W |
Compared with MMBZ5232BS-7-F and BZX384-B11,115, the BZX585-B11,115 delivers superior volumetric efficiency (40 % smaller area), tighter regulation (±2 % vs ±5 %), and lower thermal resistance (65 K/W vs ≥350 K/W), making it optimal for next-generation miniaturized power management.
Availability
BZX585-B11,115 is available at Aetrix Electronics and suitable for USB power protection, microcontroller reset circuits, industrial sensor excitation, and low-power battery monitoring requiring stable component supply and long-term obsolescence mitigation.
Supply support for BZX585-B11,115 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 leading semiconductor manufacturer specializing in high-performance, reliable discrete and logic devices for automotive, industrial, and consumer markets.
The BZX585 series belongs to Nexperia's general-purpose Zener diode product line, engineered for precision voltage regulation and transient suppression in ultra-compact SMD applications where board space and thermal performance are critical.
FAQ
What is the maximum continuous reverse current the BZX585-B11,115 can sustain?
The device has no specified maximum continuous reverse current; its steady-state operation is governed by power dissipation limits. At 11 V Zener voltage, the maximum DC reverse current is 27.3 mA (300 mW ÷ 11 V), assuming full derating at 25 °C ambient and adequate PCB copper thermal relief.
Can the BZX585-B11,115 be used in series or parallel configurations?
Series connection is permissible for higher voltage references but requires matched units to avoid current imbalance; parallel use is not recommended due to manufacturing spread in Zener knee characteristics, which causes unequal current sharing and potential thermal runaway.
How does the +5.4 mV/K temperature coefficient affect circuit performance?
This positive coefficient means the Zener voltage increases by 5.4 mV per degree Celsius rise in junction temperature. In a 11 V reference, that equates to +0.049 %/°C drift - acceptable for non-precision applications but requires compensation in high-accuracy analog systems operating across wide temperature ranges.
Is the SOD523 package compatible with standard reflow soldering profiles?
Yes - the BZX585-B11,115 is qualified for lead-free reflow per JEDEC J-STD-020, with peak temperature up to 260 °C. The recommended solder land pattern (1.4 mm × 0.5 mm pads, 0.4 mm gap) is defined in Figure 12 of the datasheet to ensure reliable joint formation and mechanical stability.
BZX585-B11,115 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):
- 11 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 10 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 8 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-B11,115 FAQ
1.How can I place an order for BZX585-B11,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX585-B11,115 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-B11,115 reliable?
The price and inventory of BZX585-B11,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX585-B11,115 is usually 5 days.
3.What payment methods are accepted for BZX585-B11,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX585-B11,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX585-B11,115?
BZX585-B11,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX585-B11,115 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-B11,115?
For technical support, including BZX585-B11,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX585-B11,115 requirements.
6.How does Aetrix verify that BZX585-B11,115 is sourced from the original manufacturer or authorized distributors?
All BZX585-B11,115 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-B11,115 meets industry standards.
7.What is the process for return or replacement of BZX585-B11,115?
All BZX585-B11,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX585-B11,115, 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-B11,115 part is unused and in its original packaging.
Return procedure for BZX585-B11,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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