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Nexperia USA Inc. BZX585-C2V4,135
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- Part No.:
- BZX585-C2V4,135
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX585-C2V4,135.pdf
- Description:
- DIODE ZENER 2.4V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:3,675
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX585-C2V4,135 from Nexperia is a 2.4 V ±5 % Zener voltage regulator diode in SOD523 (SC-79) package, rated for 300 mW total power dissipation and 40 W non-repetitive peak reverse power, used for precision low-voltage reference and overvoltage clamping in space-constrained consumer and industrial power rails.
For engineers reviewing the BZX585-C2V4,135 datasheet, BZX585-C2V4,135 pinout, BZX585-C2V4,135 application, or BZX585-C2V4,135 equivalent, key selection criteria include Zener voltage tolerance (±5 %), differential resistance (275 Ω at IZ = 5 mA), thermal resistance (65 K/W junction-to-solder point), and SC-79 footprint compatibility with high-density PCB layouts.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable 2.4 V regulation across 1–5 mA test currents, with a negative temperature coefficient of −3.5 to −1.3 mV/K ensuring predictable drift under thermal variation. Its low 275 Ω differential resistance at 5 mA supports tight regulation under dynamic load changes.
The device features ultra-small SOD523 packaging with cathode-marked anisotropic leadframe, enabling surface-mount assembly on FR4 PCBs with ≥35 mm² copper area at the cathode tab for thermal management. It withstands 40 W non-repetitive surge pulses (tp = 100 µs, square wave) at 25 °C ambient prior to surge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.28 V to 2.52 V at IZ = 5 mA - defines nominal regulation point with ±5 % tolerance for stable low-voltage reference generation |
| Differential Resistance (rdiff) | 275 Ω (typ) at IZ = 5 mA - determines output impedance and regulation sensitivity to current variation |
| Reverse Current (IR) | ≤ 50 µA at VR = 1.0 V - ensures minimal leakage before breakdown, critical for low-power standby circuits |
| Total Power Dissipation (Ptot) | 300 mW at Tamb = 25 °C on FR4 with 35 mm² cathode copper - sets continuous thermal limit for PCB-level power handling |
| Junction-to-Solder-Point Thermal Resistance (Rth(j-sp)) | 65 K/W - quantifies heat transfer efficiency from die to PCB solder joint, enabling accurate thermal design |
| Non-Repetitive Peak Reverse Power (PZSM) | 40 W for tp = 100 µs square wave - defines transient surge immunity for ESD and inductive spike suppression |
| Forward Voltage (VF) | 1.1 V at IF = 100 mA - specifies conduction loss when used as forward-biased clamp or protection element |
Pinout & Package
SOD523 (SC-79) ultra-small flat-lead plastic package with 2 terminals, 1.25 mm × 0.85 mm body size, 0.65 mm height, and cathode band marking on terminal 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marked by bar on package; carries reverse breakdown current during regulation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-compact SOD523 footprint | Enables placement in <1.1 mm² board area, supporting miniaturized wearables and IoT sensor nodes |
| ±5 % Zener voltage tolerance | Guarantees 2.28–2.52 V regulation window at 5 mA, suitable for cost-sensitive voltage reference applications |
| Low 275 Ω differential resistance | Minimizes output voltage deviation under ±1 mA load current change, improving regulation accuracy |
| 65 K/W junction-to-solder-point Rth | Allows direct thermal coupling to PCB copper, simplifying thermal design without external heatsinking |
| 40 W non-repetitive surge rating | Provides robust transient protection against 100 µs ESD events per IEC 61000-4-2 Level 4 without derating |
Applications
| USB Port Overvoltage Clamp | Microcontroller Reset Circuit Reference |
|---|---|
|
Use Scenario: Clamps 5 V USB supply transients to prevent damage to downstream 3.3 V logic ICs. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to shunt excess voltage above 2.4 V to ground. Use Value: Leverages 40 W surge rating and 275 Ω rdiff to absorb 100 µs spikes while holding clamped voltage within safe margin for 3.3 V I/O. |
Use Scenario: Provides precise 2.4 V threshold for reset supervisor ICs monitoring 3.3 V system rails. IC Role / Device Role / Timing Role: Stable Zener reference source feeding comparator input in voltage-monitoring reset generator. Use Value: ±5 % tolerance and low temperature coefficient (−3.5 to −1.3 mV/K) ensure consistent reset assertion across −40 °C to +85 °C. |
| Low-Power Sensor Bias Supply | EEPROM Write-Protection Clamp |
|
Use Scenario: Generates stable 2.4 V bias for analog front-end op-amps in battery-powered environmental sensors. IC Role / Device Role / Timing Role: Low-current Zener regulator supplying reference voltage to signal conditioning circuitry. Use Value: 50 µA max reverse leakage at 1.0 V enables operation from microamp-level coin-cell sources without significant drain. |
Use Scenario: Protects EEPROM write-enable pin from accidental 5 V programming voltage in mixed-voltage systems. IC Role / Device Role / Timing Role: Shunt clamp limiting pin voltage to 2.4 V, preventing unintended write cycles during power-up sequencing. Use Value: Fast 100 µs surge response and 1.1 V forward drop allow bidirectional clamping without interfering with normal 3.3 V logic signaling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX585-B2V4,135 | ±2 % Zener tolerance (2.35–2.45 V) vs. ±5 %; otherwise identical electrical specs and package | Preferred where tighter regulation stability is required, e.g., precision ADC references | Select BZX585-B2V4,135 only if ±2 % tolerance is mandatory; BZX585-C2V4,135 offers better cost-performance balance for general-purpose use |
| MMSZ4678T1G | 2.4 V ±5 %, SOD-123 package (2.7 mm × 1.4 mm), 500 mW Ptot, higher rdiff (350 Ω) | Used where larger footprint is acceptable and higher power dissipation is needed | Choose MMSZ4678T1G only if board layout allows SOD-123 and >300 mW continuous dissipation is required |
Compared with BZX585-B2V4,135, the C-grade offers relaxed tolerance at lower cost without sacrificing surge capability or thermal performance; versus MMSZ4678T1G, it delivers identical regulation in half the board area but with reduced absolute power headroom.
Availability
BZX585-C2V4,135 is available at Aetrix Electronics and suitable for USB power protection, microcontroller reset supervision, low-power sensor biasing, and EEPROM write-protection requiring stable component supply in high-volume consumer electronics manufacturing.
Supply support for BZX585-C2V4,135 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, serving automotive, industrial, and consumer markets with scalable manufacturing and rigorous quality control.
The BZX585 series belongs to Nexperia's general-purpose Zener diode product line, engineered specifically for compact, cost-effective voltage regulation and transient suppression in space- and power-constrained SMT applications.
FAQ
What is the maximum continuous reverse current this diode can handle?
The BZX585-C2V4,135 has a maximum continuous forward current (IF) of 200 mA, but its Zener operation relies on controlled reverse current. At 25 °C ambient on FR4 with 35 mm² cathode copper, it sustains up to ~125 mA reverse current continuously without exceeding 300 mW Ptot, calculated as VZ × IZ ≤ 300 mW → IZ ≤ 125 mA.
Can this diode be used in parallel for higher power handling?
No - Zener diodes exhibit negative temperature coefficients and parameter spread; paralleling BZX585-C2V4,135 units causes current hogging and thermal runaway. For higher power, use a single higher-rated Zener or active regulation. The 40 W surge rating applies only to individual devices under specified pulse conditions.
How does the cathode marking align with the SOD523 package outline?
The cathode is marked by a visible bar on the top surface of the SOD523 package, aligned with terminal 1 per Nexperia's package drawing (Fig. 11). When viewed from above with the marking bar leftmost, terminal 1 (cathode) is the left pad and terminal 2 (anode) is the right pad - confirmed in Table 2 and Figure 11 of the datasheet.
Is this part suitable for automotive applications?
No - the BZX585-C2V4,135 is not AEC-Q200 qualified and lacks automotive-grade screening, temperature range validation (−40 °C to +150 °C junction), or PPAP documentation. Nexperia explicitly states non-automotive qualification in Section 14; use only in commercial/industrial environments per its specified −65 °C to +150 °C storage and operating ranges.
BZX585-C2V4,135 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:
- ±5%
- 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-C2V4,135 FAQ
1.How can I place an order for BZX585-C2V4,135 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX585-C2V4,135 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-C2V4,135 reliable?
The price and inventory of BZX585-C2V4,135 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX585-C2V4,135 is usually 5 days.
3.What payment methods are accepted for BZX585-C2V4,135?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX585-C2V4,135 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX585-C2V4,135?
BZX585-C2V4,135 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX585-C2V4,135 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-C2V4,135?
For technical support, including BZX585-C2V4,135 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX585-C2V4,135 requirements.
6.How does Aetrix verify that BZX585-C2V4,135 is sourced from the original manufacturer or authorized distributors?
All BZX585-C2V4,135 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-C2V4,135 meets industry standards.
7.What is the process for return or replacement of BZX585-C2V4,135?
All BZX585-C2V4,135 units undergo pre-shipment inspection (PSI). If there is an issue with BZX585-C2V4,135, 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-C2V4,135 part is unused and in its original packaging.
Return procedure for BZX585-C2V4,135:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX585-C2V4,135 Tags
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