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Nexperia USA Inc. BZX585-B36,115
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- Part No.:
- BZX585-B36,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX585-B36,115.pdf
- Description:
- DIODE ZENER 36V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:2,289
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Product details
Overview
BZX585-B36,115 from Nexperia is a ±2 % tolerance Zener diode in SOD523 (SC-79) package, rated for 36 V nominal Zener voltage at 2 mA test current, 300 mW total power dissipation, and 40 W non-repetitive peak reverse power. It delivers low differential resistance (80 Ω typ. at IZ = 2 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-B36,115 datasheet, BZX585-B36,115 pinout, BZX585-B36,115 application, or BZX585-B36,115 equivalent, this device supports stable regulation in portable battery management, sensor signal conditioning, and microcontroller reset circuitry where ultra-small footprint and tight voltage tolerance are critical.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified 36 V nominal working voltage at IZ = 2 mA, exhibiting a temperature coefficient of +33.0 mV/K (typ.) and reverse current ≤0.05 µA at VR = 27 V. Its thermal resistance from junction to solder point is 65 K/W, enabling reliable operation on FR4 PCBs with minimal copper area.
The device features a low 0.30 mm profile and 1.25 mm × 0.85 mm body size, optimized for high-density reflow assembly. Its non-repetitive surge capability (IZSM = 0.8 A, tp = 100 µs) supports transient suppression in low-energy circuits without derating concerns under standard ambient conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 36 V nominal at IZ = 2 mA; ±2 % tolerance ensures precise 35.28–36.72 V regulation window |
| Total Power Dissipation (Ptot) | 300 mW at Tamb = 25 °C on FR4 PCB with 35 mm² cathode copper; defines continuous DC bias limit |
| Differential Resistance (rdiff) | 80 Ω typical at IZ = 2 mA; determines output impedance and load regulation sensitivity |
| Non-repetitive Peak Reverse Current (IZSM) | 0.8 A for 100 µs square wave; enables short-duration transient clamping without failure |
| Reverse Current (IR) | ≤0.05 µA at VR = 27 V; ensures minimal leakage in high-impedance reference nodes |
| Junction-to-Solder-Point Thermal Resistance (Rth(j-sp)) | 65 K/W; allows accurate thermal modeling when mounted on standard PCB land patterns |
| Package | SOD523 (SC-79); 1.25 mm × 0.85 mm × 0.30 mm footprint ideal for wearables and IoT edge nodes |
Pinout & Package
SOD523 (SC-79) ultra-small flat-lead surface-mount package with cathode band marking on terminal 1; 2-terminal configuration optimized for automated placement and reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Marked side with bar; connects to regulated voltage node; carries reverse-bias current during Zener operation |
| 2 | Anode (A) | Unmarked terminal; ties to ground or lower-potential rail; completes reverse-bias path for regulation |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener voltage tolerance | Enables tighter regulation than ±5 % variants, reducing need for post-regulation trimming in precision analog stages |
| Ultra-small SOD523 package | 0.30 mm height and 1.06 mm² board area support miniaturization in hearing aids, medical patches, and compact sensors |
| Low differential resistance (80 Ω typ.) | Minimizes output voltage shift under varying load current, improving stability in feedback references |
| High surge robustness (40 W, 100 µs) | Withstands ESD and inductive kick events without degradation, eliminating need for external TVS in many low-energy interfaces |
| Wide operating temperature range | −65 °C to +150 °C junction rating supports deployment in automotive under-hood modules and industrial motor controllers |
Applications
| Portable Battery Protection | Microcontroller Reset Circuit |
|---|---|
|
Use Scenario: Clamping battery voltage during charging cycles in Li-ion-powered wearables. IC Role / Device Role / Timing Role: Zener diode provides overvoltage clamp at 36 V to prevent MCU brownout or charger IC damage. Use Value: Tight ±2 % tolerance ensures clamp activates precisely before system-level overvoltage thresholds, avoiding false resets. |
Use Scenario: Generating clean reset signal for ARM Cortex-M0+ microcontrollers during power-up. IC Role / Device Role / Timing Role: Acts as voltage reference in RC-based reset generator to define valid VDD threshold. Use Value: Low 0.05 µA reverse leakage prevents capacitor discharge drift, ensuring consistent reset timing across temperature. |
| Sensor Signal Conditioning | Industrial I/O Protection |
|
Use Scenario: Biasing and protecting 3.3 V analog front-end inputs in environmental sensor nodes. IC Role / Device Role / Timing Role: Provides stable 36 V reference for op-amp gain-setting resistors and input clamp. Use Value: 80 Ω rdiff maintains reference accuracy despite supply ripple, preserving ADC measurement integrity. |
Use Scenario: Surge suppression on 24 V DC fieldbus lines in PLC digital input modules. IC Role / Device Role / Timing Role: Absorbs 100 µs transients up to 0.8 A without latch-up or parametric shift. Use Value: 40 W non-repetitive power rating handles repetitive surges in factory environments without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX585-C36,115 | ±5 % tolerance (34.2–37.8 V), higher max rdiff (90 Ω), identical package and Ptot | Acceptable where 1.8 V regulation window suffices; less suitable for precision reference designs | Select for cost-sensitive volume production where tighter tolerance is unnecessary |
| MMSZ5245B-7-F | 36 V nominal, ±5 %, SOD-123 package (2.7 × 1.4 mm), 500 mW Ptot, rdiff = 35 Ω | Larger footprint but higher power handling; better for higher-current bias networks | Choose when board space permits larger package and >300 mW continuous dissipation is required |
Compared with BZX585-C36,115, the BZX585-B36,115 offers tighter regulation and lower dynamic impedance for precision analog use; versus MMSZ5245B-7-F, it trades power margin for 60 % smaller board area-critical in ultra-compact designs.
Availability
BZX585-B36,115 is available at Aetrix Electronics and suitable for portable battery protection, microcontroller reset circuitry, sensor signal conditioning, and industrial I/O protection requiring stable component supply across high-mix, low-volume production runs.
Supply support for BZX585-B36,115 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 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 space-constrained voltage regulation and clamping applications demanding tight tolerance, low leakage, and robust surge immunity.
FAQ
What is the maximum continuous forward current for BZX585-B36,115?
The absolute maximum forward current is 200 mA per limiting values table. However, forward conduction is not its intended operating mode; sustained forward bias above 100 mA risks thermal overstress due to VF ≈ 1.1 V and limited Ptot = 300 mW. It should only be forward-biased briefly during testing or fault conditions.
Can BZX585-B36,115 replace a 33 V Zener in an existing design?
No-its nominal Zener voltage is 36 V with ±2 % tolerance (35.28–36.72 V), making it unsuitable as a direct 33 V replacement. Substituting would raise regulation voltage by ~3 V, potentially exceeding downstream component ratings. Use BZX585-B33,115 (33 V, ±2 %) instead for functional equivalence.
How does the SOD523 package affect thermal performance compared to SOD-123?
The SOD523 package has higher thermal resistance: Rth(j-a) = 350 K/W vs. ~250 K/W for SOD-123. This means at 300 mW dissipation, junction temperature rise is ~105 K higher in free air. Board-level copper area at the cathode pad is critical-35 mm² is specified to achieve rated Ptot.
Is BZX585-B36,115 suitable for automotive applications?
No-this part is not AEC-Q200 qualified. The datasheet explicitly states "non-automotive qualified products" and prohibits use in safety-critical systems. For automotive-grade Zeners, select Nexperia's Automotive Qualified (AQ) series, such as the BZX84-AQ36, which undergoes extended temperature cycling and humidity testing per AEC standards.
BZX585-B36,115 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):
- 36 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 25.2 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-B36,115 FAQ
1.How can I place an order for BZX585-B36,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX585-B36,115 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-B36,115 reliable?
The price and inventory of BZX585-B36,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX585-B36,115 is usually 5 days.
3.What payment methods are accepted for BZX585-B36,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX585-B36,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX585-B36,115?
BZX585-B36,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX585-B36,115 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-B36,115?
For technical support, including BZX585-B36,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX585-B36,115 requirements.
6.How does Aetrix verify that BZX585-B36,115 is sourced from the original manufacturer or authorized distributors?
All BZX585-B36,115 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-B36,115 meets industry standards.
7.What is the process for return or replacement of BZX585-B36,115?
All BZX585-B36,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX585-B36,115, 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-B36,115 part is unused and in its original packaging.
Return procedure for BZX585-B36,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX585-B36,115 Tags
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MMSZ5231B-7-F
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BZX84C3V3LT1G
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MMSZ4682T1G
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MM5Z5V1ST1G
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