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Nexperia USA Inc. BZX585-B6V8,135
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- Part No.:
- BZX585-B6V8,135
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX585-B6V8,135.pdf
- Description:
- DIODE ZENER 6.8V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:5,483
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Product details
Overview
BZX585-B6V8,135 from Nexperia is a ±2 % tolerance Zener diode in SOD523 (SC-79) package, rated for 6.8 V nominal regulation at 5 mA, with 300 mW total power dissipation and 215 A non-repetitive peak reverse current, used for precision voltage reference and overvoltage protection in space-constrained consumer and industrial power rails.
For engineers reviewing the BZX585-B6V8,135 datasheet, BZX585-B6V8,135 pinout, BZX585-B6V8,135 application, or BZX585-B6V8,135 equivalent, this part supports low-current regulation where thermal resistance to solder point (65 K/W) and differential resistance (30 Ω at 5 mA) directly impact stability in battery-powered sensors and I/O clamp circuits.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified 6.66 V to 6.94 V working voltage range at 5 mA test current, exhibiting a positive temperature coefficient of +1.2 mV/K to +3.0 mV/K across 25 °C to 150 °C. Its low 30 Ω typical differential resistance ensures minimal output voltage variation under load shifts.
Designed for surface-mount use on FR4 PCBs with ≥35 mm² copper area at the cathode tab, it achieves 65 K/W junction-to-solder-point thermal resistance-critical for maintaining regulation accuracy during transient surges up to 40 W for 100 µs square-wave pulses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 6.8 V at IZ = 5 mA - defines stable regulation point for biasing or clamping circuits |
| Zener Voltage Tolerance | ±2 % - enables tighter voltage margin control than ±5 % variants in precision references |
| Differential Resistance | 30 Ω typ. at IZ = 5 mA - determines output impedance and load regulation error |
| Max Power Dissipation | 300 mW at Tamb = 25 °C - sets continuous DC power limit on standard FR4 layout |
| Non-repetitive Peak Current | 215 A at tp = 100 µs - supports ESD/overvoltage transient suppression without failure |
| Reverse Leakage Current | 2.0 µA max at VR = 4.5 V - ensures low standby power loss in always-on monitoring nodes |
| Junction-to-Solder-Point Rth | 65 K/W - enables predictable thermal rise during pulsed operation when mounted per recommended footprint |
Pinout & Package
The BZX585-B6V8,135 is housed in an ultra-small SOD523 (SC-79) plastic surface-mount package measuring 1.25 mm × 0.85 mm × 0.65 mm, with a cathode band marking on the top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity marker (bar) aligns with cathode for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms reverse-biased junction during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-compact SOD523 footprint | Enables placement in high-density layouts where board space is constrained to <1.1 mm² |
| Low differential resistance | 30 Ω typ. minimizes voltage deviation under ±1 mA load changes in reference circuits |
| Controlled temperature coefficient | +1.2 to +3.0 mV/K allows predictable drift compensation in ambient-varying environments |
| High surge robustness | Withstands 40 W non-repetitive pulses-supports IEC 61000-4-2 Level 4 ESD protection without external TVS |
| Low leakage at sub-Zener voltage | 2.0 µA max at 4.5 V ensures negligible current draw in sleep-mode microcontroller reset circuits |
Applications
| Power Supply Reference | I/O Pin Protection |
|---|---|
Use Scenario: Providing stable 6.8 V bias to op-amp input stages in portable medical sensor front-ends. IC Role / Device Role / Timing Role: Zener diode acts as two-terminal shunt voltage reference, absorbing excess current to maintain fixed node potential. Use Value: ±2 % tolerance and 30 Ω rdiff ensure output stays within ±45 mV of target under 0–1 mA load variation, meeting clinical-grade signal chain accuracy. |
Use Scenario: Clamping UART TX/RX lines against ESD events in industrial gateways. IC Role / Device Role / Timing Role: Functions as bidirectional transient suppressor by conducting reverse surge current above 6.8 V while blocking normal 3.3 V logic swings. Use Value: 215 A peak current rating and 100 µs pulse capability meet IEC 61000-4-2 contact discharge requirements without derating. |
| Microcontroller Reset Circuit | Low-Power Sensor Biasing |
Use Scenario: Generating clean reset threshold for ARM Cortex-M0+ MCUs operating from 3.3 V LDOs. IC Role / Device Role / Timing Role: Zener diode forms voltage divider with pull-up resistor to produce precise 2.4 V reset trigger level. Use Value: 2.0 µA max IR at 4.5 V prevents >10 nA loading on weak pull-ups-preserving nanowatt sleep current budgets. |
Use Scenario: Biasing photodiode amplifier inputs in battery-powered environmental monitors. IC Role / Device Role / Timing Role: Supplies stable 6.8 V reference to transimpedance amplifier feedback network. Use Value: 65 K/W Rth(j-sp) ensures <1.5 °C junction rise during 100 µs calibration pulses-avoiding thermally induced offset drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX585-C6V8,115 | ±5 % tolerance (vs. ±2 %), identical SOD523 package and 6.8 V nominal rating | Acceptable where cost sensitivity outweighs tight voltage margin requirements | Select for cost-driven consumer products where ±5 % regulation error is acceptable in non-critical rails |
| MMSZ4689T1G | 6.8 V ±5 %, SOD-123 package (2.7 mm × 1.4 mm), higher 500 mW Ptot, 100 Ω rdiff | Requires larger PCB area but supports higher continuous power in legacy designs | Choose when existing layout accommodates SOD-123 and thermal budget exceeds 300 mW |
Compared with BZX585-C6V8,115, the BZX585-B6V8,135 delivers tighter voltage control critical for analog sensing; versus MMSZ4689T1G, it trades package size and power headroom for superior space efficiency and lower dynamic impedance in miniaturized systems.
Availability
BZX585-B6V8,135 is available at Aetrix Electronics and suitable for precision voltage reference, I/O line clamping, microcontroller reset generation, and low-power sensor biasing requiring stable component supply across high-mix production runs.
Supply support for BZX585-B6V8,135 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 protection in battery-powered and high-density PCB designs.
FAQ
What is the maximum continuous forward current for BZX585-B6V8,135?
The absolute maximum forward current is 200 mA per limiting values table. However, forward conduction is not its intended operating mode; sustained forward bias risks exceeding junction temperature limits due to low thermal resistance design optimized for reverse breakdown. Use only in reverse-biased regulation or clamping roles.
Can BZX585-B6V8,135 replace a 6.2 V Zener in an existing circuit?
No-its 6.66 V to 6.94 V working voltage range at 5 mA is incompatible with 6.2 V circuits. Substituting would raise regulated voltage by ~0.6 V, potentially violating downstream IC input tolerances or altering bias points in analog stages. Always verify Zener voltage match before replacement.
How does the SOD523 package affect thermal performance compared to SOD-123?
SOD523's smaller size yields higher thermal resistance: 65 K/W junction-to-solder-point versus ~200 K/W for SOD-123 in equivalent mounting. This means faster junction temperature rise under same power-requiring stricter attention to copper area and pulse duty cycle to avoid exceeding 150 °C max junction temperature.
Is BZX585-B6V8,135 suitable for automotive applications?
No-it is not AEC-Q200 qualified or tested for automotive temperature cycling, humidity, or vibration requirements. Nexperia explicitly states non-automotive qualification in legal disclaimers; use only in commercial or industrial environments with ambient temperatures between −65 °C and +150 °C.
BZX585-B6V8,135 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:
- ±2%
- 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-B6V8,135 FAQ
1.How can I place an order for BZX585-B6V8,135 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX585-B6V8,135 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-B6V8,135 reliable?
The price and inventory of BZX585-B6V8,135 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX585-B6V8,135 is usually 5 days.
3.What payment methods are accepted for BZX585-B6V8,135?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX585-B6V8,135 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX585-B6V8,135?
BZX585-B6V8,135 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX585-B6V8,135 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-B6V8,135?
For technical support, including BZX585-B6V8,135 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX585-B6V8,135 requirements.
6.How does Aetrix verify that BZX585-B6V8,135 is sourced from the original manufacturer or authorized distributors?
All BZX585-B6V8,135 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-B6V8,135 meets industry standards.
7.What is the process for return or replacement of BZX585-B6V8,135?
All BZX585-B6V8,135 units undergo pre-shipment inspection (PSI). If there is an issue with BZX585-B6V8,135, 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-B6V8,135 part is unused and in its original packaging.
Return procedure for BZX585-B6V8,135:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX585-B6V8,135 Tags
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