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Nexperia USA Inc. BZX585-C11YL
- Part No.:
- BZX585-C11YL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX585-C11YL.pdf
- Description:
- DIODE ZENER 11V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:5,120
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Product details
Overview
BZX585-C11YL from Nexperia is a Zener diode in SOD523 (SC-79) package, rated for 11 V nominal Zener voltage with ±5 % tolerance, 300 mW total power dissipation, and 40 W non-repetitive peak reverse power handling. It provides precision voltage regulation in space-constrained low-power circuits such as sensor biasing, reference voltage generation, and overvoltage clamping in portable electronics.
For engineers reviewing the BZX585-C11YL datasheet, BZX585-C11YL pinout, BZX585-C11YL application, or BZX585-C11YL equivalent, this page delivers verified electrical parameters, thermal resistance values, differential resistance at 5 mA, temperature coefficient behavior, and real-world use context for rapid component selection and layout integration.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under varying load and temperature conditions. Its 11 V nominal Zener voltage is specified at IZ = 5 mA, with typical differential resistance of 25 Ω and temperature coefficient of +5.4 mV/K at that current.
The device features ultra-small SOD523 packaging with cathode-indicating marking bar, optimized for high-density PCB layouts. Thermal resistance from junction to solder point is 65 K/W, enabling 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) | 10.45 V to 11.55 V at IZ = 5 mA - defines stable regulation window for reference or clamp function |
| Total Power Dissipation (Ptot) | 300 mW at Tamb = 25 °C - sets maximum continuous DC power handling on standard FR4 PCB |
| Non-repetitive Peak Reverse Power (PZSM) | 40 W for tp = 100 µs square wave - enables transient surge suppression without failure |
| Differential Resistance (rdiff) | 25 Ω typ. at IZ = 5 mA - determines regulation accuracy under load variation |
| Temperature Coefficient (SZ) | +5.4 mV/K typ. at IZ = 5 mA - quantifies voltage drift per degree Celsius rise in junction temperature |
| Reverse Current (IR) | ≤ 0.1 µA at VR = 8.8 V - ensures minimal leakage below knee voltage during standby |
| Forward Voltage (VF) | 1.1 V max at IF = 100 mA - supports bidirectional protection or dual-use in clamp+forward paths |
Pinout & Package
SOD523 (SC-79) ultra-small flat-lead surface-mount plastic package with cathode band marking; dimensions: 1.25 mm × 0.85 mm × 0.65 mm (L × W × H), 0.34 mm lead pitch.
| 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; forms reverse-biased junction for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Low differential resistance | 25 Ω typical at 5 mA - improves regulation stability against load current changes |
| Wide working voltage range | 11 V nominal with ±5 % tolerance - supports design margin for supply variations and aging |
| High surge capability | 40 W non-repetitive peak power - protects downstream circuitry from short-duration transients |
| Ultra-compact footprint | SOD523 package (1.25 × 0.85 mm) - enables placement in dense portable and wearable PCB layouts |
| Controlled temperature coefficient | +5.4 mV/K at 5 mA - allows predictable voltage shift in thermally variable environments |
Applications
| Power Supply Rail Clamping | Sensor Bias Reference |
|---|---|
Use Scenario: Protecting microcontroller I/O pins from ESD-induced voltage spikes on 3.3 V or 5 V rails. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to clamp transient voltages above 11 V while sinking surge current. Use Value: Limits voltage excursion to ≤11.55 V, preventing latch-up or gate oxide damage in connected ICs. |
Use Scenario: Providing stable bias voltage for analog front-end amplifiers in environmental sensors. IC Role / Device Role / Timing Role: Precision voltage reference source delivering 10.45–11.55 V to op-amp bias networks. Use Value: Maintains <±0.5 % regulation error over 0–70 °C ambient due to low rdiff and known SZ. |
| Low-Power Voltage Regulation | Overvoltage Protection Circuit |
Use Scenario: Regulating auxiliary 11 V supply for RF modules in battery-powered IoT nodes. IC Role / Device Role / Timing Role: Shunt regulator maintaining constant voltage across load by diverting excess current through cathode-anode path. Use Value: Delivers stable 11 V output with ≤25 Ω dynamic impedance, minimizing ripple under 1–10 mA load swings. |
Use Scenario: Safeguarding USB-C port power delivery circuitry against input overvoltage events. IC Role / Device Role / Timing Role: Fast-acting crowbar element triggered when input exceeds 11.55 V, shunting fault current to ground. Use Value: Responds within nanoseconds and withstands 40 W surges, preventing damage to downstream PMICs or controllers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX585-B11 | ±2 % tolerance (vs. ±5 %); same 11 V nominal, SOD523 package, 300 mW rating | Higher precision required in metrology-grade references or feedback loops demanding tighter VZ stability | Select when absolute voltage accuracy outweighs cost sensitivity; otherwise BZX585-C11YL offers better value for general-purpose clamping |
| MMSZ5240B | Same 11 V nominal, SOD-123 package (larger: 2.7 × 1.4 mm), 500 mW Ptot, higher rdiff (~30 Ω) | Preferred where board space allows larger footprint and higher continuous power is needed | Choose for legacy designs using SOD-123 land patterns or where thermal margin requires >300 mW dissipation |
Compared with BZX585-B11, BZX585-C11YL trades 3 % tolerance for lower unit cost and sufficient stability for non-critical regulation; versus MMSZ5240B, it sacrifices 200 mW continuous power for 54 % smaller footprint and improved high-frequency response due to lower capacitance.
Availability
BZX585-C11YL is available at Aetrix Electronics and suitable for portable medical monitors, industrial sensor nodes, and consumer wearables requiring stable component supply with tight lead-time control and full traceability.
Supply support for BZX585-C11YL 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 specializing in high-performance logic, discrete, and MOSFET devices, with leadership in automotive-grade and energy-efficient components.
The BZX585 series belongs to Nexperia's general-purpose Zener diode product line, engineered for compact, reliable voltage regulation and transient suppression in consumer, industrial, and computing applications.
FAQ
What is the maximum continuous reverse current the BZX585-C11YL can handle at 25 °C?
The device supports up to 200 mA forward current, but for Zener operation, maximum continuous reverse current is derived from Ptot/VZ: 300 mW ÷ 10.45 V ≈ 28.7 mA at 25 °C ambient. Exceeding this without thermal derating risks junction overheating beyond 150 °C.
How does the cathode marking appear on the BZX585-C11YL package?
A single dark band on the top surface of the SOD523 case identifies Pin 1 as the cathode. This matches the simplified outline in Nexperia's datasheet Figure 11 and aligns with industry-standard SC-79 polarity marking conventions for Zener diodes.
Can BZX585-C11YL be used in parallel for higher power handling?
No - Zener diodes exhibit manufacturing spread in VZ, causing current hogging in parallel configurations. Even matched units require ballast resistors, which defeat the purpose of compact regulation. For >300 mW, select a higher-rated single device like BZX84-C11 or use active regulation.
What is the typical junction-to-solder-point thermal resistance for this diode?
Rth(j-sp) is 65 K/W under standard mounting conditions (FR4 PCB with 35 mm² copper at cathode tab). This value enables accurate thermal modeling when estimating junction temperature rise during pulsed or continuous operation.
BZX585-C11YL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX585
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 11 V
- Tolerance:
- ±5%
- 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 (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
BZX585-C11YL FAQ
1.How can I place an order for BZX585-C11YL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX585-C11YL 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-C11YL reliable?
The price and inventory of BZX585-C11YL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX585-C11YL is usually 5 days.
3.What payment methods are accepted for BZX585-C11YL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX585-C11YL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX585-C11YL?
BZX585-C11YL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX585-C11YL 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-C11YL?
For technical support, including BZX585-C11YL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX585-C11YL requirements.
6.How does Aetrix verify that BZX585-C11YL is sourced from the original manufacturer or authorized distributors?
All BZX585-C11YL 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-C11YL meets industry standards.
7.What is the process for return or replacement of BZX585-C11YL?
All BZX585-C11YL units undergo pre-shipment inspection (PSI). If there is an issue with BZX585-C11YL, 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-C11YL part is unused and in its original packaging.
Return procedure for BZX585-C11YL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX585-C11YL Tags
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