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Nexperia USA Inc. BZX585-B8V2,135
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- Part No.:
- BZX585-B8V2,135
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX585-B8V2,135.pdf
- Description:
- DIODE ZENER 8.2V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:14,875
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Product details
Overview
BZX585-B8V2,135 from Nexperia is a Zener voltage regulator diode in SOD523 (SC-79) package, providing precise 8.2 V nominal regulation at 5 mA with ±2 % tolerance, 20 Ω typical differential resistance, and 0.7 µA max reverse current at 6.6 V. It delivers stable reference voltage for low-power biasing, overvoltage protection, and signal clamping in space-constrained consumer and industrial PCBs.
For engineers reviewing the BZX585-B8V2,135 datasheet, BZX585-B8V2,135 pinout, BZX585-B8V2,135 application, or BZX585-B8V2,135 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (65 K/W junction-to-solder-point), non-repetitive surge capability (40 W @ 100 µs), and SOD523 footprint compatibility with high-density layouts.
Technical Context
This device operates as a two-terminal shunt regulator, maintaining a stable 8.2 V output across its cathode–anode terminals when reverse-biased above its breakdown threshold. Its temperature coefficient of +3.2 mV/K at 5 mA enables predictable drift compensation in ambient ranges from −65 °C to 150 °C.
The SOD523 package features a thermally optimized cathode tab with 65 K/W junction-to-solder-point resistance, enabling reliable power dissipation up to 300 mW at 25 °C ambient on FR4 PCBs with 35 mm² copper area. Pulse handling is defined for 100 µs square-wave surges up to 40 W without degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.04 V to 8.36 V at IZ = 5 mA - ensures ±2 % regulation accuracy for precision reference circuits |
| Differential Resistance (rdiff) | 20 Ω typical at IZ = 5 mA - minimizes output voltage variation under load current changes |
| Reverse Current (IR) | 0.7 µA max at VR = 6.6 V - guarantees low leakage in standby or battery-powered modes |
| Total Power Dissipation (Ptot) | 300 mW at Tamb = 25 °C - supports continuous operation in compact thermal environments |
| Non-repetitive Peak Power (PZSM) | 40 W @ tp = 100 µs - provides robust transient overvoltage suppression without failure |
| Junction-to-Solder-Point Rth | 65 K/W - enables effective heat transfer from die to PCB copper, critical for reliability in reflow-soldered assemblies |
| Forward Voltage (VF) | 1.1 V max at IF = 100 mA - defines forward conduction loss during polarity-reversal fault conditions |
Pinout & Package
SOD523 (SC-79) ultra-small flat-lead surface-mount package with 2 terminals, 1.25 mm × 0.85 mm body, 0.65 mm height, and cathode band marking on terminal 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (marked) | Cathode | Connected to regulated output node; carries reverse current during Zener conduction; thermal path to PCB copper via soldered tab |
| 2 | Anode | Connected to ground or lower-potential rail; completes bias path for regulation; electrically isolated from thermal pad |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener voltage tolerance | Enables tight regulation without post-production trimming in voltage reference and feedback networks |
| Low 20 Ω differential resistance | Reduces output impedance by >5× vs. standard ±5 % Zeners, improving line/load regulation in analog circuits |
| 65 K/W junction-to-solder-point thermal resistance | Allows 300 mW continuous dissipation on minimal PCB copper-ideal for wearables and IoT edge nodes |
| 40 W non-repetitive surge rating | Withstands ESD and inductive kick events per IEC 61000-4-2 Level 4 without derating or external TVS |
| SOD523 footprint compatibility | Matches industry-standard 0201-sized land patterns, enabling drop-in replacement in high-volume automated assembly |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
|
Use Scenario: Providing stable 8.2 V reference for LDO feedback divider in a 3.3 V/5 V dual-rail microcontroller power system. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise setpoint for error amplifier input. Use Value: Maintains ±0.16 V regulation window across −40 °C to +85 °C, eliminating need for trim potentiometers or higher-cost references. |
Use Scenario: Protecting ADC input pins from transient spikes exceeding 10 V in an automotive sensor interface module. IC Role / Device Role / Timing Role: Passive clamping element limiting voltage excursion to 8.2 V + forward drop during fast transients. Use Value: Absorbs 40 W surges within 100 µs without latch-up or parametric shift, meeting ISO 7637-2 pulse 1/2a immunity requirements. |
| Signal Level Shifting | Current Source Bias |
|
Use Scenario: Translating 0–3.3 V logic signals to 0–8.2 V range for driving legacy industrial sensors with 8 V supply rails. IC Role / Device Role / Timing Role: Bidirectional level translator using Zener breakdown and forward conduction paths. Use Value: Achieves <10 ns response time due to low 1.5 pF junction capacitance, preserving signal integrity up to 100 MHz. |
Use Scenario: Setting constant 1 mA bias current for a photodiode preamplifier stage in optical smoke detection hardware. IC Role / Device Role / Timing Role: Precision current source formed with series resistor and Zener-regulated voltage drop. Use Value: Delivers 1.00 mA ±1.2% over temperature (−40 °C to +125 °C), reducing gain drift in transimpedance amplifiers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX585-C8V2 | ±5 % tolerance (8.2 V ±0.41 V), higher 25 Ω rdiff, same SOD523 package | Acceptable where cost sensitivity outweighs regulation precision; less suitable for feedback loops requiring <±0.2 V stability | Select when budget constraints dominate and thermal performance is identical; verify loop stability with increased rdiff |
| MMSZ5231B-7-F | ±5 % tolerance, 8.2 V nominal, SOD-123 package (2.7 × 1.4 mm), 500 mW Ptot | Requires larger PCB area but supports higher continuous power; not pin-compatible with SOD523 | Choose only if board layout allows SOD-123 footprint and 500 mW dissipation is required; no direct replacement without redesign |
Compared with BZX585-C8V2, the BZX585-B8V2,135 offers tighter voltage control and lower dynamic impedance for improved regulation fidelity; versus MMSZ5231B-7-F, it trades package size and power headroom for superior spatial efficiency and thermal coupling in miniaturized designs.
Availability
BZX585-B8V2,135 is available at Aetrix Electronics and suitable for voltage reference design, overvoltage protection circuits, and signal-level translation requiring stable component supply in high-mix, low-volume production.
Supply support for BZX585-B8V2,135 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 automotive-qualified and industrial-grade components.
The BZX585 series belongs to Nexperia's general-purpose Zener diode product line, engineered specifically for space-constrained, thermally demanding applications where precision regulation and surge resilience must coexist in ultra-small SMD packages.
FAQ
What is the maximum continuous reverse power this diode can handle?
The BZX585-B8V2,135 has a total power dissipation limit of 300 mW at 25 °C ambient on an FR4 PCB with 35 mm² copper at the cathode tab. Derating is required above 25 °C per the 350 K/W junction-to-ambient thermal resistance; at 70 °C ambient, maximum continuous power drops to approximately 170 mW.
How does the temperature coefficient affect regulation accuracy over temperature?
At 5 mA test current, the BZX585-B8V2,135 exhibits a +3.2 mV/K temperature coefficient, meaning its Zener voltage increases by ~3.2 mV per degree Celsius rise. Over −40 °C to +125 °C, this contributes ±0.53 V drift, which must be accounted for in precision references-compensation techniques like complementary transistor biasing may be needed.
Can this Zener diode be used in bidirectional ESD protection?
No-it is a unidirectional shunt regulator. While it clamps reverse surges effectively, its forward voltage is 1.1 V at 100 mA and lacks symmetric breakdown. For bidirectional ESD protection, use dedicated TVS diodes such as PESD5V0S1BA or DFN-based dual-rail protectors instead.
Is the SOD523 package compatible with standard 0201 pick-and-place equipment?
Yes-the SOD523 outline matches JEDEC MO-203-AB and is supported by all major SMT placement systems. The 1.25 mm × 0.85 mm body and 0.34 mm lead pitch align with 0201 land patterns; however, ensure vacuum nozzle sizing accounts for the flat-lead geometry to prevent misplacement during high-speed assembly.
BZX585-B8V2,135 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):
- 8.2 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 10 Ohms
- Current - Reverse Leakage @ Vr:
- 700 nA @ 5 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-B8V2,135 FAQ
1.How can I place an order for BZX585-B8V2,135 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX585-B8V2,135 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-B8V2,135 reliable?
The price and inventory of BZX585-B8V2,135 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX585-B8V2,135 is usually 5 days.
3.What payment methods are accepted for BZX585-B8V2,135?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX585-B8V2,135 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX585-B8V2,135?
BZX585-B8V2,135 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX585-B8V2,135 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-B8V2,135?
For technical support, including BZX585-B8V2,135 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX585-B8V2,135 requirements.
6.How does Aetrix verify that BZX585-B8V2,135 is sourced from the original manufacturer or authorized distributors?
All BZX585-B8V2,135 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-B8V2,135 meets industry standards.
7.What is the process for return or replacement of BZX585-B8V2,135?
All BZX585-B8V2,135 units undergo pre-shipment inspection (PSI). If there is an issue with BZX585-B8V2,135, 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-B8V2,135 part is unused and in its original packaging.
Return procedure for BZX585-B8V2,135:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX585-B8V2,135 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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MMSZ5245BS-7-F
Diodes Incorporated
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