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Nexperia USA Inc. BZX585-C13F
- Part No.:
- BZX585-C13F
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX585-C13F.pdf
- Description:
- DIODE ZENER 13V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:6,735
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Product details
Overview
BZX585-C13F from Nexperia is a Zener voltage regulator diode in SOD523 (SC-79) package, designed for precision low-power voltage reference and clamping in space-constrained circuits. It delivers a nominal 13 V Zener voltage at 5 mA, ±5 % tolerance, with 25 Ω typical differential resistance and 105 mA non-repetitive peak reverse current - used in power supply feedback loops and overvoltage protection for microcontroller I/O rails.
For engineers reviewing the BZX585-C13F datasheet, BZX585-C13F pinout, BZX585-C13F application, or BZX585-C13F equivalent, this page provides verified electrical parameters, thermal behavior, cathode/anode terminal mapping, real-world regulation use cases, and validated alternative parts for voltage reference design and ESD-tolerant biasing.
Technical Context
This device operates as a two-terminal silicon Zener diode, conducting in reverse breakdown to maintain stable voltage across its terminals under controlled current. Its 13 V nominal Zener voltage is specified at IZ = 5 mA with ±5 % tolerance, and exhibits a positive temperature coefficient of +7.0 mV/K at that condition.
The SOD523 package enables high-density PCB layouts while limiting total power dissipation to 300 mW at Tamb = 25 °C. Thermal resistance from junction to solder point is 65 K/W, supporting reliable operation in thermally constrained consumer and industrial modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 12.35 V to 13.65 V at IZ = 5 mA - defines stable regulation window for feedback or clamp circuits |
| Tolerance | ±5 % - ensures predictable voltage setpoint without binning or calibration |
| Differential Resistance (rdiff) | 25 Ω typ. at IZ = 5 mA - determines output impedance and load regulation error |
| Non-repetitive Peak Reverse Current (IZSM) | 105 mA at tp = 100 µs - supports transient surge suppression in signal line protection |
| Total Power Dissipation (Ptot) | 300 mW at Tamb = 25 °C on FR4 with 35 mm² copper - sets maximum continuous DC or average pulsed power handling |
| Forward Voltage (VF) | 1.1 V max at IF = 100 mA - defines conduction loss when used in series forward-biased configurations |
| Junction Temperature Range | −65 °C to +150 °C - enables deployment in extended-temperature industrial and automotive-adjacent environments |
Pinout & Package
SOD523 (SC-79) ultra-small flat-lead surface-mount package: 1.25 mm × 0.85 mm footprint, 0.65 mm height, cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; reverse-bias anode-to-cathode voltage establishes Zener breakdown |
| 2 | Anode (A) | Connected to reference ground or lower-potential rail; current flows into cathode during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low differential resistance | 25 Ω typical at 5 mA - minimizes output voltage variation under load current changes |
| Ultra-small SMD package | SOD523 (1.25 × 0.85 mm) - enables placement in tight spaces such as wearable sensor PCBs and IoT edge nodes |
| Wide Zener voltage range | 13 V nominal within E24 series - matches common logic-level and analog reference requirements without custom trimming |
| Controlled temperature coefficient | +7.0 mV/K at IZ = 5 mA - allows predictable drift compensation in temperature-sensitive references |
| High surge capability | 40 W non-repetitive peak power (100 µs square wave) - absorbs short-duration transients without degradation |
Applications
| Power Supply Feedback Reference | Microcontroller I/O Clamp |
|---|---|
|
Use Scenario: Stabilizing output voltage of a buck converter's optocoupler-based feedback loop. IC Role / Device Role / Timing Role: Zener diode provides precise 13 V reference to drive optocoupler LED, enabling isolated voltage sensing. Use Value: Tight ±5 % tolerance and low 25 Ω rdiff ensure <1 % output regulation error across line/load variations. |
Use Scenario: Protecting 3.3 V GPIO pins from accidental 12 V misconnection or ESD events. IC Role / Device Role / Timing Role: Connected cathode-to-GPIO, anode-to-ground; clamps voltage above 13 V to prevent latch-up. Use Value: 105 mA IZSM safely shunts transient energy without failure, preserving MCU integrity. |
| Low-Power Sensor Biasing | Reference Voltage Divider |
|
Use Scenario: Providing stable bias to a photodiode amplifier in battery-powered environmental sensors. IC Role / Device Role / Timing Role: Acts as low-current (5 mA) voltage source for op-amp input stage, replacing higher-quiescent LDOs. Use Value: 300 mW Ptot limit and 1.1 V VF allow efficient operation from coin-cell or energy-harvesting sources. |
Use Scenario: Generating a 13 V reference for ADC input scaling in industrial data acquisition modules. IC Role / Device Role / Timing Role: Used with precision resistors to create ratiometric reference; Zener voltage anchors full-scale definition. Use Value: +7.0 mV/K temperature coefficient enables predictable drift modeling and software compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX585-B13 | ±2 % tolerance, 25 Ω rdiff, same 13 V nominal, identical SOD523 package | Higher precision required in closed-loop feedback where ±5 % introduces measurable error | Select when tighter regulation stability outweighs cost sensitivity |
| MMSZ5243B | 13 V nominal, ±5 %, SOD-123 package (2.7 × 1.4 mm), 500 mW Ptot, 30 Ω rdiff | Larger footprint but higher power margin; less suitable for ultra-dense layouts | Choose when board space permits and higher surge robustness is prioritized over miniaturization |
Compared with BZX585-B13, the C13F trades precision for cost and availability; versus MMSZ5243B, it sacrifices power headroom and thermal margin to achieve 55 % smaller PCB area - making it optimal for miniaturized, cost-sensitive, and thermally managed designs.
Availability
BZX585-C13F is available at Aetrix Electronics and suitable for power supply feedback references, microcontroller I/O clamping, low-power sensor biasing, and reference voltage divider circuits requiring stable component supply and consistent parametric performance.
Supply support for BZX585-C13F 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 high-volume, high-reliability standard products including logic, discretes, MOSFETs, and bipolar devices - headquartered in Nijmegen, Netherlands.
The BZX585 series belongs to Nexperia's general-purpose Zener diode product line, engineered specifically for compact, low-power voltage regulation and transient clamping in consumer, computing, and industrial electronics.
FAQ
What is the maximum continuous reverse current for BZX585-C13F at 25 °C ambient?
The device does not specify a maximum continuous reverse current independent of power dissipation. At 25 °C ambient on FR4 with 35 mm² copper, its 300 mW total power dissipation limit corresponds to approximately 23 mA at 13 V (P = V × I). Exceeding this causes junction temperature rise beyond safe operating limits.
Can BZX585-C13F be used in series with another Zener to achieve higher reference voltage?
Yes, but with caution: series connection increases total dynamic impedance and temperature coefficient uncertainty. The combined rdiff becomes additive (e.g., two 25 Ω devices yield ~50 Ω), degrading regulation accuracy under varying load. Parallel use is not recommended due to mismatched Zener voltages causing current hogging.
How does the cathode marking appear on the SOD523 package?
A single dark band is printed on the top surface of the SOD523 package, aligned with Pin 1 (cathode). This marking is visible under standard optical inspection and matches the "K" designation in the pinning diagram - critical for correct orientation during automated placement and manual rework.
Is BZX585-C13F suitable for automotive applications?
No - this part is not AEC-Q200 qualified and lacks automotive-grade screening, qualification testing, or guaranteed extended-temperature performance beyond its stated −65 °C to +150 °C junction range. Nexperia explicitly states non-automotive qualification in its legal disclaimers; use requires full customer validation for each target vehicle subsystem.
BZX585-C13F 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):
- 13 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 (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
BZX585-C13F FAQ
1.How can I place an order for BZX585-C13F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX585-C13F 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-C13F reliable?
The price and inventory of BZX585-C13F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX585-C13F is usually 5 days.
3.What payment methods are accepted for BZX585-C13F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX585-C13F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX585-C13F?
BZX585-C13F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX585-C13F 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-C13F?
For technical support, including BZX585-C13F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX585-C13F requirements.
6.How does Aetrix verify that BZX585-C13F is sourced from the original manufacturer or authorized distributors?
All BZX585-C13F 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-C13F meets industry standards.
7.What is the process for return or replacement of BZX585-C13F?
All BZX585-C13F units undergo pre-shipment inspection (PSI). If there is an issue with BZX585-C13F, 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-C13F part is unused and in its original packaging.
Return procedure for BZX585-C13F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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