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Nexperia USA Inc. BZX585-C11,135
- Part No.:
- BZX585-C11,135
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX585-C11,135.pdf
- Description:
- DIODE ZENER 11V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:9,999
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Product details
Overview
BZX585-C11,135 from Nexperia is a ±5 % tolerance Zener diode in SOD523 (SC-79) package, rated for 11 V nominal regulation at 5 mA, with 300 mW total power dissipation and 40 W non-repetitive peak reverse power handling. It delivers low differential resistance (25 Ω typ. at IZ = 5 mA) and operates across −65 °C to +150 °C junction temperature, supporting precision voltage reference and overvoltage clamping in space-constrained DC power rails.
For engineers reviewing the BZX585-C11,135 datasheet, BZX585-C11,135 pinout, BZX585-C11,135 application, or BZX585-C11,135 equivalent, this device serves as a compact, thermally efficient Zener solution where tight voltage tolerance, low dynamic impedance, and ultra-small footprint are required in portable electronics, sensor signal conditioning, and microcontroller I/O protection circuits.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified nominal Zener voltage of 11 V at 5 mA test current, exhibiting a typical temperature coefficient of +5.4 mV/K and reverse current ≤ 0.1 µA at 8.8 V. Its thermal resistance from junction to solder point is 65 K/W, enabling stable regulation under transient surge conditions when mounted on FR4 PCB with 35 mm² copper area at the cathode tab.
The device features a low forward voltage drop of 1.1 V at 100 mA and maintains differential resistance below 25 Ω (typ.) and 150 Ω (max) at 5 mA, ensuring minimal output voltage variation under load changes. Its non-repetitive peak reverse current capability reaches 2.5 A for 100 µs square-wave pulses at 25 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11 V nominal at IZ = 5 mA; ±5 % tolerance ensures predictable clamping level in reference and protection circuits |
| Total Power Dissipation (Ptot) | 300 mW at Tamb = 25 °C; defines continuous DC power handling on standard FR4 PCB |
| Differential Resistance (rdiff) | 25 Ω typical at IZ = 5 mA; determines regulation stiffness and output voltage ripple suppression |
| Non-repetitive Peak Reverse Power (PZSM) | 40 W for tp = 100 µs; enables robust transient overvoltage absorption without failure |
| Reverse Current (IR) | ≤ 0.1 µA at VR = 8.8 V; guarantees low leakage in high-impedance bias networks |
| Thermal Resistance (Rth(j-sp)) | 65 K/W to solder point; supports reliable thermal transfer in densely packed layouts |
| Package | SOD523 (SC-79); 1.25 mm × 0.85 mm footprint with 0.65 mm height - optimized for 0201-class board space |
Pinout & Package
SOD523 (SC-79) ultra-small flat-lead surface-mount package with cathode-indicating marking bar; 2-terminal configuration optimized for automated placement and reflow soldering per IPC-7095 guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Marked side) | Cathode (K) | Connected to regulated output node; polarity must be observed for correct Zener conduction |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-compact SMD package | SOD523 footprint (1.25 × 0.85 mm) reduces PCB area by >50 % vs. SOD323, enabling high-density layout |
| Low differential resistance | 25 Ω typical at 5 mA improves regulation accuracy under varying load currents in feedback networks |
| High surge robustness | 40 W non-repetitive peak power rating allows safe absorption of ESD and inductive kickback transients |
| Stable temperature coefficient | +5.4 mV/K at 11 V minimizes drift over industrial temperature range (−40 °C to +85 °C ambient) |
| Low leakage performance | 0.1 µA max reverse current at 80 % VZ preserves signal integrity in high-impedance sensor interfaces |
Applications
| Power Supply Reference | Microcontroller I/O Protection |
|---|---|
|
Use Scenario: Providing stable 11 V reference for ADC voltage dividers and analog comparators in battery-powered IoT nodes. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to clamp reference node voltage with minimal drift. Use Value: Tight ±5 % tolerance and 25 Ω rdiff ensure <±110 mV absolute error and <1.1 mV/mA load regulation error. |
Use Scenario: Clamping 3.3 V or 5 V GPIO lines against ESD events and bus overvoltage in embedded controllers. IC Role / Device Role / Timing Role: Bidirectional transient suppressor leveraging Zener breakdown in reverse and low VF forward conduction. Use Value: 40 W surge rating and 1.1 V forward drop enable fast clamping without damaging downstream logic inputs. |
| Sensor Signal Conditioning | DC Rail Overvoltage Detection |
|
Use Scenario: Biasing photodiode or RTD bridge circuits requiring precise, low-noise 11 V excitation voltage. IC Role / Device Role / Timing Role: Low-leakage (0.1 µA) Zener reference stabilizing bias current sources in analog front-ends. Use Value: Sub-microampere IR prevents measurement offset errors in picoampere-level sensor current paths. |
Use Scenario: Triggering shutdown circuitry when 12 V supply exceeds safe threshold in automotive body control modules. IC Role / Device Role / Timing Role: Voltage-sensing element feeding comparator input to detect overvoltage condition. Use Value: 11 V nominal VZ with +5.4 mV/K TC provides predictable trip point shift of +0.43 V over 80 °C ambient range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX585-B11,115 | ±2 % tolerance (vs. ±5 %), higher cost, identical SOD523 package and thermal specs | Required where tighter regulation stability is critical, e.g., precision DAC reference buffers | Select when VZ accuracy dominates cost and board space constraints |
| MMSZ5240B-7-F | Same 11 V nominal, ±5 %, but SOD-123 package (2.7 × 1.4 mm); 500 mW Ptot; higher rdiff (30 Ω typ.) | Better thermal margin for continuous operation, but occupies >3× more PCB area | Prefer when long-term power dissipation >200 mW is expected and layout space permits |
Compared with BZX585-B11,115, the BZX585-C11,135 trades ±2 % accuracy for lower unit cost and identical size; versus MMSZ5240B-7-F, it offers 40 % smaller footprint and superior regulation stiffness at the expense of 200 mW lower continuous power headroom.
Availability
BZX585-C11,135 is available at Aetrix Electronics and suitable for portable medical monitors, industrial sensor nodes, automotive body electronics, and consumer wearables requiring stable component supply with guaranteed lead-time visibility and full traceability.
Supply support for BZX585-C11,135 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, miniaturization, and robustness for high-volume electronics.
The BZX585 series belongs to Nexperia's general-purpose Zener diode product line, engineered specifically for space-constrained voltage regulation and transient suppression in consumer, industrial, and computing applications.
FAQ
What is the maximum continuous reverse current the BZX585-C11,135 can sustain at 25 °C ambient?
The device has no defined maximum continuous reverse current rating; instead, its DC power limit is governed by Ptot = 300 mW. At 11 V Zener voltage, this corresponds to a maximum average reverse current of 27.3 mA (300 mW ÷ 11 V), assuming negligible forward drop and ideal thermal conditions on FR4 with 35 mm² copper.
Can the BZX585-C11,135 be used in series or parallel configurations for higher voltage or current handling?
Series connection is viable for higher voltage references but requires matched units to avoid uneven voltage distribution due to Zener voltage tolerance and temperature coefficient variance. Parallel use is not recommended - mismatched rdiff and VZ cause current hogging and thermal runaway, even with ballast resistors.
How does the SOD523 package affect thermal performance compared to larger Zener packages like SOD-123?
The SOD523 package exhibits higher thermal resistance: Rth(j-a) = 350 K/W (free air) and Rth(j-sp) = 65 K/W (to solder point), versus ~200 K/W and ~40 K/W for SOD-123. This limits continuous power handling but remains sufficient for pulsed or low-duty-cycle regulation when PCB copper area is optimized at the cathode pad.
Is the BZX585-C11,135 suitable for automotive applications per AEC-Q200?
No - the BZX585-C11,135 is not AEC-Q200 qualified. Nexperia explicitly states in its legal disclaimers that non-automotive qualified products are unsuitable for automotive use. For automotive-grade Zeners, select the BZX84-Axx or PZMxx series, which undergo extended temperature cycling, humidity testing, and qualification per AEC-Q200 Rev D.
BZX585-C11,135 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:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 10 Ohms
- Current - Reverse Leakage @ Vr:
- 100 µA @ 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-C11,135 FAQ
1.How can I place an order for BZX585-C11,135 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX585-C11,135 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-C11,135 reliable?
The price and inventory of BZX585-C11,135 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX585-C11,135 is usually 5 days.
3.What payment methods are accepted for BZX585-C11,135?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX585-C11,135 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX585-C11,135?
BZX585-C11,135 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX585-C11,135 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-C11,135?
For technical support, including BZX585-C11,135 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX585-C11,135 requirements.
6.How does Aetrix verify that BZX585-C11,135 is sourced from the original manufacturer or authorized distributors?
All BZX585-C11,135 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-C11,135 meets industry standards.
7.What is the process for return or replacement of BZX585-C11,135?
All BZX585-C11,135 units undergo pre-shipment inspection (PSI). If there is an issue with BZX585-C11,135, 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-C11,135 part is unused and in its original packaging.
Return procedure for BZX585-C11,135:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX585-C11,135 Tags
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MMSZ4682T1G
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MM5Z5V1ST1G
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