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Nexperia USA Inc. BZX585-B2V4,135
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- Part No.:
- BZX585-B2V4,135
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX585-B2V4,135.pdf
- Description:
- DIODE ZENER 2.4V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:8,941
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Product details
Overview
BZX585-B2V4,135 from Nexperia is a 2.4 V ±2 % tolerance Zener diode in SOD523 (SC-79) package, rated for 300 mW total power dissipation and 40 W non-repetitive peak reverse power, used for precision voltage regulation in low-power analog and digital supply rail stabilization circuits.
For engineers reviewing the BZX585-B2V4,135 datasheet, BZX585-B2V4,135 pinout, BZX585-B2V4,135 application, or BZX585-B2V4,135 equivalent, this device is selected for compact voltage reference design, overvoltage clamping in I/O protection, and biasing in sensor signal conditioning where tight tolerance and ultra-small footprint are critical.
Technical Context
This Zener diode operates in reverse breakdown with a nominal working voltage of 2.4 V at 5 mA test current, exhibiting low differential resistance (275 Ω typ. at 5 mA) and negative temperature coefficient (−3.5 to −1.3 mV/K), enabling stable reference generation across −65 °C to +150 °C junction temperature range.
Its SOD523 package delivers thermal resistance of 65 K/W from junction to solder point, supporting reliable operation under pulsed surge conditions up to 100 µs square wave with peak reverse current of 6.0 A, while maintaining forward voltage ≤1.1 V at 100 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.4 V nominal, 2.35–2.45 V min–max at IZ = 5 mA - defines precise clamping threshold for 3.3 V or 5 V rail monitoring |
| Tolerance | ±2 % - ensures tight regulation without post-production trimming in production-grade references |
| Total Power Dissipation | 300 mW at Tamb = 25 °C on FR4 PCB with 35 mm² copper - supports continuous DC regulation in space-constrained IoT nodes |
| Non-repetitive Peak Reverse Power | 40 W at tp = 100 µs - enables transient overvoltage suppression in ESD-prone interfaces |
| Differential Resistance | 275 Ω typical at IZ = 5 mA - limits output impedance drift under load variation in feedback networks |
| Reverse Current (IR) | 50 µA max at VR = 1.0 V - ensures low leakage in battery-backed standby circuits |
| Forward Voltage | 1.1 V max at IF = 100 mA - allows use as low-drop rectifier or polarity protection element |
Pinout & Package
SOD523 (SC-79) ultra-small flat-lead surface-mount package: 1.25 mm × 0.85 mm body, 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-biased terminal where Zener breakdown occurs |
| 2 | Anode (A) | Connected to ground or lower-potential rail; establishes reference polarity and current return path |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-compact SOD523 footprint | Enables placement in 0402-class board area (1.25 × 0.85 mm), ideal for wearables and miniaturized sensors |
| Low differential resistance | 275 Ω typ. at 5 mA improves regulation accuracy under varying load currents in feedback loops |
| Two tolerance options | ±2 % (B-series) and ±5 % (C-series) allow cost/performance trade-off without redesigning layout |
| High surge robustness | 40 W non-repetitive peak power rating supports IEC 61000-4-2 Level 4 ESD protection integration |
| Wide operating temperature | −65 °C to +150 °C junction range permits use in automotive under-hood and industrial motor control environments |
Applications
| Power Supply Rail Clamping | Sensor Bias Reference |
|---|---|
|
Use Scenario: Clamp 3.3 V microcontroller I/O pins against transient overvoltage during hot-plug events. IC Role / Device Role / Timing Role: Zener diode configured in shunt mode between I/O line and ground to limit voltage excursion to 2.4 V. Use Value: Prevents latch-up and gate oxide damage with <50 µA leakage below 1.0 V, ensuring system-level ESD resilience. |
Use Scenario: Provide stable 2.4 V bias for analog front-end amplifiers in temperature-sensing modules. IC Role / Device Role / Timing Role: Precision voltage reference source for op-amp input biasing and ADC reference scaling. Use Value: ±2 % tolerance and −3.5 mV/K tempco enable <±1.5 % reference stability over −40 °C to +85 °C ambient. |
| Low-Power Voltage Monitor | USB Interface Protection |
|
Use Scenario: Detect brown-out condition on 5 V USB-powered peripheral by comparing divided rail to 2.4 V Zener threshold. IC Role / Device Role / Timing Role: Threshold comparator reference element in discrete undervoltage lockout (UVLO) circuit. Use Value: 275 Ω rdiff minimizes threshold shift under sensing resistor loading, improving trip-point repeatability. |
Use Scenario: Protect USB D+ and D− lines from ESD surges using bidirectional Zener clamp configuration. IC Role / Device Role / Timing Role: Low-capacitance (450 pF) shunt element absorbing 6.0 A peak surge current per line. Use Value: 40 W surge rating and 100 µs pulse capability meet IEC 61000-4-2 requirements without degrading high-speed signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5221BS-7-F | 2.4 V ±5 %, SOT-323 package (2.1 × 1.25 mm), 200 mW Ptot, 300 Ω rdiff | Larger footprint and lower surge rating (25 W); less suitable for ultra-dense layouts | Select when legacy SOT-323 compatibility or higher-volume pricing outweighs size constraints |
| BZX384-B2V4 | 2.4 V ±2 %, SOD-323 package (1.7 × 1.25 mm), 300 mW, 250 Ω rdiff, 150 °C Tj | 1.7 mm length increases board area by 40 %; identical thermal and electrical specs otherwise | Choose when existing SOD-323 land pattern reuse eliminates NRE cost, despite larger size |
Compared with MMBZ5221BS-7-F and BZX384-B2V4, BZX585-B2V4,135 offers the smallest available footprint for 2.4 V ±2 % Zeners while matching their thermal and surge performance-critical for next-generation portable electronics where board area is at a premium.
Availability
BZX585-B2V4,135 is available at Aetrix Electronics and suitable for low-power voltage reference design, I/O line clamping, and sensor biasing requiring stable component supply across high-mix, low-volume production runs.
Supply support for BZX585-B2V4,135 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 devices optimized for efficiency and miniaturization in consumer, industrial, and automotive applications.
The BZX585 series belongs to Nexperia's general-purpose Zener diode product line, engineered specifically for space-constrained voltage regulation and transient suppression in modern SMT designs where ultra-small packaging and tight tolerances are mandatory.
FAQ
What is the maximum continuous reverse current this Zener can handle at 25 °C?
The BZX585-B2V4,135 has a maximum continuous forward current of 200 mA, but its Zener operation relies on controlled reverse current. At 25 °C ambient, it sustains 5 mA nominal Zener current with 300 mW total dissipation limit; sustained reverse current must stay below ~125 mA to avoid exceeding Ptot given VZ = 2.4 V.
Does the cathode marking align with standard SOD523 orientation conventions?
Yes-the marking bar on the BZX585-B2V4,135 corresponds to Pin 1 (cathode), consistent with JEDEC SOD523 outline and Nexperia's package drawing. When viewed from top with marking bar leftmost, Pin 1 is left, Pin 2 is right, matching standard SC-79 pinning.
Can this device be used in series to achieve higher Zener voltages?
No-stacking Zener diodes in series is not recommended due to mismatched temperature coefficients and dynamic impedance variations. The BZX585 series offers discrete types up to 75 V; for 4.8 V, use BZX585-B4V7 or BZX585-C4V7 instead of cascading two 2.4 V units.
How does its thermal resistance compare to larger-package Zeners?
With Rth(j-sp) = 65 K/W to solder point, the BZX585-B2V4,135 achieves thermal performance comparable to SOD-323 devices despite its smaller size, thanks to optimized cathode tab thermal path-enabling full 300 mW dissipation on standard FR4 with 35 mm² copper area.
BZX585-B2V4,135 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):
- 2.4 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 50 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-B2V4,135 FAQ
1.How can I place an order for BZX585-B2V4,135 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX585-B2V4,135 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-B2V4,135 reliable?
The price and inventory of BZX585-B2V4,135 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX585-B2V4,135 is usually 5 days.
3.What payment methods are accepted for BZX585-B2V4,135?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX585-B2V4,135 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX585-B2V4,135?
BZX585-B2V4,135 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX585-B2V4,135 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-B2V4,135?
For technical support, including BZX585-B2V4,135 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX585-B2V4,135 requirements.
6.How does Aetrix verify that BZX585-B2V4,135 is sourced from the original manufacturer or authorized distributors?
All BZX585-B2V4,135 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-B2V4,135 meets industry standards.
7.What is the process for return or replacement of BZX585-B2V4,135?
All BZX585-B2V4,135 units undergo pre-shipment inspection (PSI). If there is an issue with BZX585-B2V4,135, 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-B2V4,135 part is unused and in its original packaging.
Return procedure for BZX585-B2V4,135:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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