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Nexperia USA Inc. BZX585-B75,115
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- Part No.:
- BZX585-B75,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX585-B75,115.pdf
- Description:
- DIODE ZENER 75V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:2,702
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX585-B75,115 from Nexperia is a 75 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 and overvoltage clamping in space-constrained low-power circuits such as sensor biasing, reference stabilization, and I/O protection.
For engineers reviewing the BZX585-B75,115 datasheet, BZX585-B75,115 pinout, BZX585-B75,115 application, or BZX585-B75,115 equivalent, key selection criteria include Zener voltage tolerance (±2 %), differential resistance (170 Ω at IZ = 2 mA), thermal resistance (65 K/W junction-to-solder point), and ultra-small SOD523 footprint compatibility with high-density PCB layouts.
Technical Context
This Zener diode operates in reverse breakdown mode with a nominal Zener voltage of 75 V at 2 mA test current, exhibiting a positive temperature coefficient of +80.2 mV/K at that condition. Its low 170 Ω differential resistance ensures stable regulation under varying load currents.
The device supports transient suppression via 40 W non-repetitive peak reverse power handling (100 µs square wave, Tj = 25 °C), while its 65 K/W junction-to-solder-point thermal resistance enables effective heat transfer to PCB copper when mounted on ≥35 mm² cathode-area copper.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 75 V nominal at IZ = 2 mA; tight ±2 % tolerance ensures accurate voltage reference in precision analog circuits. |
| Differential Resistance (rdiff) | 170 Ω max at IZ = 2 mA; low impedance maintains regulation stability across load variations. |
| Temperature Coefficient (SZ) | +80.2 mV/K at IZ = 2 mA; predictable positive drift aids thermal compensation design. |
| Total Power Dissipation (Ptot) | 300 mW at Tamb = 25 °C on FR4 with 35 mm² cathode copper; defines continuous DC operating limit. |
| Non-repetitive Peak Reverse Power (PZSM) | 40 W for 100 µs square wave; enables robust transient voltage suppression without device failure. |
| Junction-to-Solder-Point Thermal Resistance (Rth(j-sp)) | 65 K/W; allows efficient heat conduction from die to PCB, critical for reliability in thermally constrained layouts. |
| Reverse Current (IR) | 0.05 µA max at VR = 57 V; ultra-low leakage preserves accuracy in high-impedance bias networks. |
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 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal; carries reverse-biased current during regulation. |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path enabling Zener breakdown at 75 V. |
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 management. |
| ±2 % Zener voltage tolerance | Reduces need for post-production trimming in voltage reference designs, improving yield and consistency. |
| Low 170 Ω differential resistance | Maintains <±0.34 V output variation over ±2 mA load change, supporting stable biasing for op-amps and ADC references. |
| 40 W non-repetitive surge capability | Withstands ESD and line transients per IEC 61000-4-2 Level 4 without derating, simplifying system-level protection. |
| 65 K/W junction-to-solder-point Rth | Permits >200 mW sustained power at 75 °C ambient when mounted on minimal copper, easing thermal layout. |
Applications
| Industrial Sensor Signal Conditioning | USB Port Overvoltage Protection |
|---|---|
|
Use Scenario: Stabilizing bias voltage for MEMS pressure sensor front-end amplifiers in factory automation nodes. IC Role / Device Role / Timing Role: Zener reference providing 75 V rail for high-side current sense amplifier bias, ensuring consistent gain across temperature. Use Value: ±2 % VZ tolerance and +80.2 mV/K SZ enable predictable drift compensation, reducing calibration steps in production test. |
Use Scenario: Clamping induced surges on USB VBUS lines in embedded host controllers exposed to hot-plug events. IC Role / Device Role / Timing Role: Transient voltage suppressor limiting VBUS spikes to ≤75 V during 100 µs ESD events, protecting downstream USB PHY. Use Value: 40 W PZSM rating and 170 Ω rdiff ensure clamping voltage stays within USB 2.0 60 V absolute maximum during fast transients. |
| Low-Power RF Module Biasing | Medical Wearable Reference Generation |
|
Use Scenario: Supplying stable gate voltage to GaN FET drivers in compact 2.4 GHz ISM-band transceivers. IC Role / Device Role / Timing Role: Precision Zener regulating 75 V auxiliary supply for driver IC logic rails, minimizing RF noise coupling. Use Value: 0.05 µA IR at 57 V prevents loading of high-impedance bias dividers, preserving RF signal integrity. |
Use Scenario: Generating calibrated reference for ECG analog front-end ADCs in battery-powered patch monitors. IC Role / Device Role / Timing Role: Low-drift voltage reference establishing 75 V scaling factor for 24-bit delta-sigma conversion. Use Value: 65 K/W Rth(j-sp) and 300 mW Ptot allow continuous operation at 45 °C ambient without thermal derating, extending battery life. |
Availability
BZX585-B75,115 is available at Aetrix Electronics and suitable for industrial sensor conditioning, USB port protection, RF module biasing, and medical wearable reference generation requiring stable component supply with guaranteed long-term availability.
Supply support for BZX585-B75,115 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 for precision voltage regulation and transient suppression in ultra-compact SMD packages targeting space- and power-sensitive designs.
FAQ
What is the maximum continuous forward current for BZX585-B75,115?
The absolute maximum forward current is 200 mA per IEC 60134 limiting values. However, forward conduction is not its intended operating mode; it is designed for reverse-bias Zener regulation. Continuous forward bias above 100 mA risks exceeding 300 mW total dissipation and thermal limits.
Can BZX585-B75,115 be used as a substitute for BZX585-C75,115?
No - BZX585-B75,115 has ±2 % Zener voltage tolerance (73.5–76.5 V), while BZX585-C75,115 has ±5 % (71.25–78.75 V). The tighter tolerance of the 'B' grade provides higher accuracy for reference applications but is not interchangeable where looser tolerance is acceptable or specified.
What is the recommended PCB pad layout for SOD523 mounting?
Nexperia specifies a reflow soldering footprint with 0.5 mm pad width, 0.6 mm pad length, 0.4 mm solder mask opening, and 2.15 mm center-to-center spacing. Use ≥35 mm² copper area connected to the cathode pad to achieve the rated 65 K/W thermal resistance.
Does BZX585-B75,115 meet automotive AEC-Q200 requirements?
No - the BZX585 series is not AEC-Q200 qualified. It is rated for industrial temperature range (−65 °C to +150 °C) but lacks automotive-grade qualification, stress testing, and traceability documentation required for automotive applications.
BZX585-B75,115 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):
- 75 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 255 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 52.5 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-B75,115 FAQ
1.How can I place an order for BZX585-B75,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX585-B75,115 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-B75,115 reliable?
The price and inventory of BZX585-B75,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX585-B75,115 is usually 5 days.
3.What payment methods are accepted for BZX585-B75,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX585-B75,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX585-B75,115?
BZX585-B75,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX585-B75,115 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-B75,115?
For technical support, including BZX585-B75,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX585-B75,115 requirements.
6.How does Aetrix verify that BZX585-B75,115 is sourced from the original manufacturer or authorized distributors?
All BZX585-B75,115 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-B75,115 meets industry standards.
7.What is the process for return or replacement of BZX585-B75,115?
All BZX585-B75,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX585-B75,115, 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-B75,115 part is unused and in its original packaging.
Return procedure for BZX585-B75,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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