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Nexperia USA Inc. BZX585-B11,135
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- Part No.:
- BZX585-B11,135
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX585-B11,135.pdf
- Description:
- DIODE ZENER 11V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:9,705
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Product details
Overview
BZX585-B11,135 from Nexperia is a ±2 % 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, used for precision voltage reference and overvoltage clamping in space-constrained consumer and industrial power rails.
For engineers reviewing the BZX585-B11,135 datasheet, BZX585-B11,135 pinout, BZX585-B11,135 application, or BZX585-B11,135 equivalent, this part supports compact voltage stabilization in battery management, sensor interface biasing, and microcontroller reset circuitry where tight tolerance and ultra-small footprint are critical.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified 11 V nominal working voltage (VZ = 10.78–11.22 V at IZ = 5 mA), exhibiting a positive temperature coefficient of +5.4 to +9.0 mV/K across its operating current range. Its low thermal resistance (Rth(j-sp) = 65 K/W) enables reliable surge handling when soldered directly to PCB copper.
The device features two-terminal construction with cathode-marked anode-cathode polarity, optimized for DC voltage regulation and transient suppression in low-power analog and digital subsystems - not intended for high-frequency signal routing or switching applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 11 V (min 10.78 V, max 11.22 V at IZ = 5 mA); defines stable regulation point for reference circuits |
| Tolerance | ±2 %; ensures tight output voltage consistency without post-production trimming |
| Total Power Dissipation | 300 mW at Tamb = 25 °C on FR4 PCB with 35 mm² cathode copper; sets continuous DC load limit |
| Non-repetitive Peak Reverse Power | 40 W (tp = 100 µs square wave); supports ESD and surge protection in transient events |
| Differential Resistance | 25 Ω typical at IZ = 5 mA; determines regulation stiffness under load variation |
| Reverse Current @ VR = 8.8 V | ≤ 0.1 µA; confirms sharp knee and low leakage below breakdown threshold |
| Junction Temperature Range | −65 °C to +150 °C; validates operation in extended industrial and automotive-adjacent environments |
Pinout & Package
SOD523 (SC-79) ultra-small flat-lead surface-mount package: 1.70 mm × 0.85 mm × 0.65 mm body, cathode marked by band 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 during Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-compact SMD footprint | SOD523 package enables placement in <1.0 mm² board area - ideal for wearables and IoT edge nodes |
| Low differential resistance | 25 Ω typical at 5 mA ensures minimal output voltage shift under ±1 mA load change |
| High surge capability | 40 W non-repetitive peak power withstand allows use in IEC 61000-4-2 level 4 ESD protection networks |
| Stable temperature coefficient | +5.4 to +9.0 mV/K enables predictable drift compensation in temperature-sensitive references |
| Wide operating temperature range | −65 °C to +150 °C junction rating supports deployment in unheated outdoor enclosures and engine bay-adjacent modules |
Applications
| Power Supply Rail Clamping | Sensor Bias Reference |
|---|---|
Use Scenario: Protecting 12 V input rails against load dump transients in automotive accessory modules. IC Role / Device Role / Timing Role: Zener diode acting as shunt clamp to limit voltage excursion above 11 V during 40 W surge events. Use Value: Prevents damage to downstream LDOs and MCU I/O pins without requiring external TVS or active circuitry. | Use Scenario: Providing stable 11 V bias to op-amp input stages in industrial pressure transducer signal conditioning. IC Role / Device Role / Timing Role: Precision voltage reference source with ±2 % tolerance and low tempco for analog front-end calibration. Use Value: Enables <0.1 % full-scale error contribution from reference drift across −40 °C to +85 °C ambient. |
| Microcontroller Reset Circuit | USB Port Overvoltage Protection |
Use Scenario: Generating clean reset signal for ARM Cortex-M0+ MCUs during brown-out conditions. IC Role / Device Role / Timing Role: Zener-regulated threshold detector feeding RC delay network into reset pin. Use Value: Guarantees reset assertion at ≤10.78 V with <10 µA quiescent current, extending battery life in portable devices. | Use Scenario: Safeguarding USB 2.0 data lines and VBUS detection circuitry against accidental 12 V misconnection. IC Role / Device Role / Timing Role: Low-capacitance (≤0.1 pF) shunt clamp limiting VBUS to 11 V before damage occurs. Use Value: Maintains signal integrity (<0.5 pF added capacitance) while surviving 100 µs surges per IEC 61000-4-5. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX585-C11,135 | ±5 % tolerance (vs. ±2 %), identical VZ range and package | Lower cost for non-critical biasing where 11.55 V max regulation is acceptable | Select when budget constraints outweigh need for tight voltage accuracy |
| MMSZ5240B-7-F | Same 11 V nominal, ±5 %, SOD-123 package (2.7 × 1.6 mm vs. 1.7 × 0.85 mm) | Higher thermal mass but 3× larger footprint; 500 mW Ptot rating | Choose only if board layout permits larger size and higher continuous power is required |
Compared with BZX585-C11,135 and MMSZ5240B-7-F, the BZX585-B11,135 uniquely balances ultra-miniature packaging, ±2 % precision, and 40 W surge capability - making it optimal for next-generation miniaturized systems where both accuracy and space are constrained.
Availability
BZX585-B11,135 is available at Aetrix Electronics and suitable for power supply rail clamping, sensor bias reference, and microcontroller reset circuitry requiring stable component supply with guaranteed long-term continuity.
Supply support for BZX585-B11,135 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 focused on essential efficiency technologies, delivering 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 specifically for compact, high-precision voltage regulation and transient suppression in space-limited applications.
FAQ
What is the maximum continuous forward current for BZX585-B11,135?
The absolute maximum forward current is 200 mA per IEC 60134 limiting values. However, forward conduction is not its intended operating mode - it is designed for reverse-bias Zener regulation. Continuous forward bias exceeds safe thermal limits and risks permanent degradation.
Can BZX585-B11,135 replace a 12 V Zener diode in a 12 V system?
No - its nominal Zener voltage is 11 V (10.78–11.22 V), not 12 V. Using it as a 12 V clamp would allow up to 1.22 V of unregulated overvoltage, risking damage to downstream 12 V-rated components. Select BZX585-B12,135 for true 12 V regulation.
Does this diode require a series resistor in regulation applications?
Yes - a current-limiting resistor is mandatory to set IZ within 1–20 mA range and prevent thermal runaway. For 12 V input and 11 V output at 5 mA, a 200 Ω ±1 % resistor provides proper bias while maintaining ±2 % regulation accuracy.
Is BZX585-B11,135 qualified for automotive applications?
No - it is not AEC-Q200 qualified. While its −65 °C to +150 °C junction rating meets some automotive temperature requirements, Nexperia explicitly states this series is non-automotive qualified and unsuitable for safety-critical vehicle systems without additional validation.
BZX585-B11,135 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:
- ±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-B11,135 FAQ
1.How can I place an order for BZX585-B11,135 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX585-B11,135 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-B11,135 reliable?
The price and inventory of BZX585-B11,135 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX585-B11,135 is usually 5 days.
3.What payment methods are accepted for BZX585-B11,135?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX585-B11,135 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX585-B11,135?
BZX585-B11,135 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX585-B11,135 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-B11,135?
For technical support, including BZX585-B11,135 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX585-B11,135 requirements.
6.How does Aetrix verify that BZX585-B11,135 is sourced from the original manufacturer or authorized distributors?
All BZX585-B11,135 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-B11,135 meets industry standards.
7.What is the process for return or replacement of BZX585-B11,135?
All BZX585-B11,135 units undergo pre-shipment inspection (PSI). If there is an issue with BZX585-B11,135, 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-B11,135 part is unused and in its original packaging.
Return procedure for BZX585-B11,135:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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