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Nexperia USA Inc. BZX585-C6V8,135
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- Part No.:
- BZX585-C6V8,135
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX585-C6V8,135.pdf
- Description:
- DIODE ZENER 6.8V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:7,087
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Product details
Overview
BZX585-C6V8,135 from Nexperia is a ±5 % tolerance Zener diode in SOD523 (SC-79) package, rated for 6.8 V nominal regulation voltage at 5 mA, with 30 Ω typical differential resistance and 300 mW total power dissipation. It delivers stable voltage reference and overvoltage clamping in space-constrained consumer and industrial power rails.
For engineers reviewing the BZX585-C6V8,135 datasheet, BZX585-C6V8,135 pinout, BZX585-C6V8,135 application, or BZX585-C6V8,135 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (65 K/W junction-to-solder-point), non-repetitive surge capability (215 A peak reverse current), and SC-79 footprint compatibility with high-density PCB layouts.
Technical Context
This Zener diode operates in reverse breakdown to maintain a stable 6.8 V reference across load and line variations, with temperature coefficient of +1.2 mV/K at 5 mA - enabling predictable drift compensation in precision analog circuits. Its low 30 Ω differential resistance ensures minimal output impedance under dynamic current changes.
The device uses silicon planar epitaxial construction with cathode-marked SOD523 packaging, supporting reflow soldering per JEDEC J-STD-020. Thermal performance is defined by Rth(j-sp) = 65 K/W to the cathode solder point, making it suitable for thermally constrained board-level regulation where heatsinking is impractical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.46 V to 7.14 V at IZ = 5 mA - defines regulation window for stable 6.8 V reference under nominal bias |
| Differential Resistance (rdiff) | 30 Ω typical at IZ = 5 mA - determines output impedance and load regulation error sensitivity |
| Power Dissipation (Ptot) | 300 mW at Tamb = 25 °C on FR4 with 35 mm² copper - sets continuous DC power handling limit |
| Non-repetitive Peak Current (IZSM) | 215 A at tp = 100 µs - enables transient overvoltage suppression without failure |
| Forward Voltage (VF) | 1.1 V max at IF = 100 mA - defines conduction loss when used as clamp in forward direction |
| Temperature Coefficient (SZ) | +1.2 mV/K at IZ = 5 mA - quantifies voltage drift per degree Celsius for thermal design margining |
| Junction-to-Solder-Point Rth | 65 K/W - critical for estimating junction temperature rise above PCB copper during sustained operation |
Pinout & Package
SOD523 (SC-79) ultra-small flat-lead surface-mount plastic 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 (K) | Cathode | Connected to regulated output node; marking bar identifies this terminal; carries reverse breakdown current |
| 2 (A) | Anode | 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 - ideal for wearables, IoT sensors, and miniaturized power modules |
| ±5 % Zener voltage tolerance | Guarantees 6.46–7.14 V regulation band at 5 mA - balances cost and precision for non-critical biasing |
| Low 30 Ω differential resistance | Minimizes output voltage shift under ±10 mA load variation - improves stability in feedback networks |
| 215 A non-repetitive surge rating | Withstands ESD and inductive kickback events without degradation - eliminates need for external TVS in many cases |
| 65 K/W junction-to-solder-point thermal resistance | Allows direct thermal coupling to PCB copper - supports >200 mW derated power in 60 °C ambient with minimal layout effort |
Applications
| USB Port Overvoltage Protection | Microcontroller Reset Circuit Reference |
|---|---|
Use Scenario: Clamping 5 V USB VBUS against transient surges up to ±15 V during hot-plug or ESD events. IC Role / Device Role / Timing Role: Zener diode functions as shunt regulator and transient voltage suppressor between VBUS and ground. Use Value: Leverages 215 A peak surge rating and 1.1 V forward drop to absorb energy without latch-up, protecting downstream USB PHY ICs. |
Use Scenario: Providing stable 6.8 V reference to RC network generating reset pulse for ARM Cortex-M microcontrollers. IC Role / Device Role / Timing Role: Zener establishes precise threshold voltage triggering reset assertion when supply drops below 6.8 V × 0.9 = 6.12 V. Use Value: ±5 % tolerance and +1.2 mV/K tempco ensure reset threshold remains within 100 mV over −40 to +85 °C operating range. |
| Low-Power Sensor Biasing | Industrial Signal Conditioning Input Clamp |
Use Scenario: Generating 6.8 V bias for analog front-end op-amps in battery-powered environmental sensors. IC Role / Device Role / Timing Role: Zener acts as passive voltage reference sourcing ≤1 mA quiescent current to amplifier input stage. Use Value: 300 mW Ptot and 30 Ω rdiff enable stable 6.8 V output even with 5 % supply ripple, minimizing sensor offset drift. |
Use Scenario: Limiting 0–10 V analog input signals to prevent ADC saturation in PLC I/O modules. IC Role / Device Role / Timing Role: Zener placed between signal line and 6.8 V rail to clamp positive excursions above 7.14 V (max VZ). Use Value: 30 Ω rdiff ensures clamping voltage stays within 100 mV of nominal during 1 mA fault current - preserving 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 |
|---|---|---|---|
| BZX585-B6V8,135 | ±2 % tolerance (6.66–6.94 V), higher cost, tighter rdiff (40 Ω typ) | Required where regulation accuracy > ±3 % is mandated, e.g., precision ADC references | Select when absolute voltage accuracy outweighs cost and board space constraints |
| MMSZ5236B-7-F | Same 6.8 V nominal, ±5 %, but SOD-123 package (2.7 × 1.4 mm) and higher Ptot (500 mW) | Preferred for higher-power clamping where thermal margin exceeds 300 mW | Choose when board layout allows larger footprint and >300 mW continuous dissipation is needed |
Compared with BZX585-B6V8,135, the C-grade offers lower cost and adequate accuracy for general-purpose use; versus MMSZ5236B-7-F, it trades thermal headroom for 55 % smaller PCB area - critical in ultra-dense portable designs.
Availability
BZX585-C6V8,135 is available at Aetrix Electronics and suitable for USB protection circuits, microcontroller reset networks, low-power sensor biasing, and industrial analog input clamping requiring stable component supply and rapid prototyping support.
Supply support for BZX585-C6V8,135 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 logic, discrete, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in high-volume electronics.
The BZX585 series targets space-constrained voltage regulation and transient suppression, emphasizing ultra-small SOD523 packaging, tight thermal resistance, and robust surge capability for modern portable and industrial systems.
FAQ
What is the maximum continuous reverse current for BZX585-C6V8,135 at 25 °C?
The maximum continuous reverse current is derived from its 300 mW total power dissipation and 6.8 V Zener voltage, yielding approximately 44 mA (300 mW ÷ 6.8 V). This assumes no additional ambient temperature derating and full thermal coupling to PCB copper per datasheet test conditions.
Can BZX585-C6V8,135 be used in place of a 6.8 V TL431-based shunt regulator?
No - the BZX585-C6V8,135 is a passive two-terminal Zener diode without adjustable reference or active feedback. It lacks the 2.5 V internal reference, sink current capability, and temperature-stable 0.5 % initial accuracy of the TL431, making it unsuitable for precision programmable regulation.
How does the +1.2 mV/K temperature coefficient affect long-term voltage stability?
Over a 100 °C temperature range (−40 to +60 °C), the coefficient causes a +120 mV shift in Zener voltage (1.2 mV/K × 100 K), resulting in a final regulation value between 6.58 V and 6.90 V. This is acceptable for non-critical biasing but requires compensation in precision analog references.
Is the SOD523 package compatible with standard reflow profiles for lead-free assembly?
Yes - Nexperia specifies compatibility with JEDEC J-STD-020 Class 3 reflow profiles. The recommended peak temperature is 260 °C for ≤ 30 seconds, with ramp rates and soak zones matching IPC-7531 guidelines for small-outline plastic packages.
BZX585-C6V8,135 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):
- 6.8 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 4 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-C6V8,135 FAQ
1.How can I place an order for BZX585-C6V8,135 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX585-C6V8,135 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-C6V8,135 reliable?
The price and inventory of BZX585-C6V8,135 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX585-C6V8,135 is usually 5 days.
3.What payment methods are accepted for BZX585-C6V8,135?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX585-C6V8,135 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX585-C6V8,135?
BZX585-C6V8,135 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX585-C6V8,135 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-C6V8,135?
For technical support, including BZX585-C6V8,135 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX585-C6V8,135 requirements.
6.How does Aetrix verify that BZX585-C6V8,135 is sourced from the original manufacturer or authorized distributors?
All BZX585-C6V8,135 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-C6V8,135 meets industry standards.
7.What is the process for return or replacement of BZX585-C6V8,135?
All BZX585-C6V8,135 units undergo pre-shipment inspection (PSI). If there is an issue with BZX585-C6V8,135, 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-C6V8,135 part is unused and in its original packaging.
Return procedure for BZX585-C6V8,135:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX585-C6V8,135 Tags
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