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Nexperia USA Inc. BZX585-C3V0,135
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- Part No.:
- BZX585-C3V0,135
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX585-C3V0,135.pdf
- Description:
- DIODE ZENER 3V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:6,594
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Product details
Overview
BZX585-C3V0,135 from Nexperia is a ±5 % tolerance Zener diode in SOD523 (SC-79) package, rated for 3.0 V nominal regulation at 5 mA, with 325 Ω typical differential resistance and 10 µA max reverse current at 2.4 V, used for precision voltage reference and overvoltage protection in space-constrained power rails.
For engineers reviewing the BZX585-C3V0,135 datasheet, BZX585-C3V0,135 pinout, BZX585-C3V0,135 application, or BZX585-C3V0,135 equivalent, this device supports low-power biasing, ESD clamp staging, and analog sensor reference stabilization where ultra-small footprint and tight voltage tolerance are critical.
Technical Context
This Zener operates in reverse breakdown mode with a specified 3.0 V working voltage at IZ = 5 mA, exhibiting a temperature coefficient of −1.6 mV/K across 25 °C to 150 °C, enabling stable regulation under thermal drift conditions in portable and battery-powered systems.
Its non-repetitive peak reverse power dissipation is rated at 40 W for 100 µs square-wave pulses, while total DC power dissipation is limited to 300 mW at 25 °C ambient on FR4 PCB with 35 mm² copper area-supporting transient suppression without thermal runaway.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 3.0 V at IZ = 5 mA - defines precise regulation point for low-voltage reference circuits |
| Voltage Tolerance | ±5 % - ensures predictable clamping within 2.85 V to 3.15 V under production variation |
| Differential Resistance | 325 Ω typ. at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Reverse Current | ≤10 µA at VR = 2.4 V - guarantees minimal leakage before breakdown onset |
| Total Power Dissipation | 300 mW at Tamb = 25 °C - sets maximum continuous DC power handling on standard PCB layout |
| Non-repetitive Peak Power | 40 W for tp = 100 µs - enables robust surge immunity against short-duration transients |
| Junction Temperature Range | −65 °C to +150 °C - supports operation in extended industrial and automotive-adjacent environments |
Pinout & Package
The BZX585-C3V0,135 is housed in an SOD523 (SC-79) ultra-small flat-lead surface-mount plastic package measuring 1.25 mm × 0.85 mm × 0.65 mm, optimized for high-density PCB layouts and automated reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal for correct orientation during placement |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms reverse-biased junction for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-compact SMD package | SOD523 footprint (1.25 × 0.85 mm) reduces board area by >50 % vs. SOD323, enabling wearables and miniaturized IoT nodes |
| Low differential resistance | 325 Ω typ. improves regulation accuracy under varying load currents in feedback loops and reference dividers |
| Controlled temperature coefficient | −1.6 mV/K minimizes drift-induced error in 3 V rail monitoring over −40 °C to +85 °C operating range |
| High surge robustness | 40 W non-repetitive peak power rating allows integration into primary-side ESD protection chains without external TVS stacking |
| Two-tolerance option | ±5 % grade balances cost and performance for non-critical biasing, while ±2 % variants available for tighter references |
Applications
| Portable Sensor Biasing | USB Port Overvoltage Clamp |
|---|---|
|
Use Scenario: Providing stable 3.0 V reference to MEMS accelerometer and humidity sensor ICs in Bluetooth earbuds. IC Role / Device Role / Timing Role: Zener diode functions as shunt voltage reference, maintaining constant bias voltage despite battery discharge from 4.2 V to 3.0 V. Use Value: Enables <1 % full-scale measurement error across operating temperature range due to low rdiff and controlled SZ. |
Use Scenario: Clamping D+ line voltage during hot-plug events on USB 2.0 host ports in embedded gateways. IC Role / Device Role / Timing Role: Acts as secondary overvoltage protector downstream of primary TVS, absorbing residual surges below 3.3 V logic threshold. Use Value: Prevents false enumeration and PHY latch-up by limiting D+ to ≤3.15 V with <10 ns response and no forward conduction penalty. |
| Low-Power Microcontroller Reset Circuit | Industrial Analog Input Protection |
|
Use Scenario: Generating clean 3.0 V reset threshold for ARM Cortex-M0+ MCU in smart meter front-end modules. IC Role / Device Role / Timing Role: Zener establishes precise undervoltage detection level in RC-based reset generator, triggering reset when VDD drops below 3.0 V. Use Value: Guarantees deterministic reset assertion with ±0.15 V window, eliminating brown-out instability during AC line sags. |
Use Scenario: Protecting 12-bit SAR ADC input from field-induced transients in 4–20 mA loop receivers. IC Role / Device Role / Timing Role: Placed in series with current-limiting resistor to clamp input to 3.0 V, preventing ADC input stage damage or latch-up. Use Value: Limits fault current to <100 mA during 1 kV EFT bursts while preserving signal integrity via low capacitance (<1 pF). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5223BS-7-F | 3.0 V, ±5 %, SOT-323 package (2.1 × 1.3 mm), 350 mW Ptot, rdiff = 350 Ω | Larger footprint and higher thermal resistance (Rth(j-a) ≈ 450 K/W) reduce suitability for ultra-dense layouts | Select when existing PCB land pattern uses SOT-323 or higher power margin is required |
| BZX384-C3V0 | 3.0 V, ±5 %, SOD-323 package (1.7 × 1.3 mm), 300 mW Ptot, rdiff = 300 Ω, Rth(j-a) = 300 K/W | Lower differential resistance but 40 % larger area; not compatible with SOD523 footprints | Choose for improved regulation stability where board space permits and thermal performance is prioritized |
Compared with MMBZ5223BS-7-F and BZX384-C3V0, the BZX585-C3V0,135 delivers identical voltage accuracy in the smallest possible footprint, making it optimal for next-generation wearables and miniaturized industrial sensors where PCB real estate is constrained and thermal mass is minimal.
Availability
BZX585-C3V0,135 is available at Aetrix Electronics and suitable for portable sensor biasing, USB port overvoltage clamping, and low-power microcontroller reset circuits requiring stable component supply and guaranteed long-term manufacturability.
Supply support for BZX585-C3V0,135 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 high-volume, high-reliability discrete and logic devices, with leadership in advanced packaging and automotive-qualified components.
The BZX585 series belongs to Nexperia's general-purpose Zener diode product line, engineered specifically for compact, cost-effective voltage regulation and transient protection in consumer, industrial, and communications equipment.
FAQ
What is the maximum continuous reverse current the BZX585-C3V0,135 can sustain at 25 °C?
The device is rated for a maximum DC reverse current of 200 mA per Absolute Maximum Ratings (Table 5), but practical continuous operation is limited by its 300 mW total power dissipation. At 3.0 V Zener voltage, this corresponds to ~100 mA average current on FR4 PCB with 35 mm² copper at cathode-exceeding this risks thermal runaway.
Does the BZX585-C3V0,135 have a specified junction-to-solder-point thermal resistance?
Yes-Rth(j-sp) is 65 K/W (Table 6), measured from junction to solder point of the cathode tab. This value enables accurate thermal modeling when the cathode is connected to a dedicated thermal pad or large copper pour, improving power handling beyond the 300 mW free-air rating.
How does the −1.6 mV/K temperature coefficient affect regulation accuracy over temperature?
Over a 100 °C span (25 °C to 125 °C), the Zener voltage shifts by −0.16 V, resulting in a 3.0 V nominal device operating between 2.84 V and 3.16 V. This 5.3 % deviation remains within the ±5 % initial tolerance band and is fully characterized in Figure 6 of the datasheet.
Can the BZX585-C3V0,135 be used in series or parallel configurations for higher voltage or current capability?
No-Zener diodes must not be paralleled due to mismatched breakdown characteristics causing current hogging. Series connection is possible but requires individual current limiting resistors per device; however, the SOD523 package is not rated for such configurations, and Nexperia specifies only single-device operation per datasheet.
BZX585-C3V0,135 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):
- 3 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 1 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-C3V0,135 FAQ
1.How can I place an order for BZX585-C3V0,135 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX585-C3V0,135 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-C3V0,135 reliable?
The price and inventory of BZX585-C3V0,135 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX585-C3V0,135 is usually 5 days.
3.What payment methods are accepted for BZX585-C3V0,135?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX585-C3V0,135 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX585-C3V0,135?
BZX585-C3V0,135 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX585-C3V0,135 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-C3V0,135?
For technical support, including BZX585-C3V0,135 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX585-C3V0,135 requirements.
6.How does Aetrix verify that BZX585-C3V0,135 is sourced from the original manufacturer or authorized distributors?
All BZX585-C3V0,135 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-C3V0,135 meets industry standards.
7.What is the process for return or replacement of BZX585-C3V0,135?
All BZX585-C3V0,135 units undergo pre-shipment inspection (PSI). If there is an issue with BZX585-C3V0,135, 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-C3V0,135 part is unused and in its original packaging.
Return procedure for BZX585-C3V0,135:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX585-C3V0,135 Tags
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