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Nexperia USA Inc. BZX585-B9V1,115
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- Part No.:
- BZX585-B9V1,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX585-B9V1,115.pdf
- Description:
- DIODE ZENER 9.1V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:309
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Product details
Overview
BZX585-B9V1,115 from Nexperia is a ±2 % tolerance Zener diode in SOD523 (SC-79) package, rated for 9.1 V nominal regulation at 5 mA, with 300 mW total power dissipation and 40 W non-repetitive peak reverse power capability. It serves as a precision voltage reference or overvoltage clamp in low-power analog signal conditioning, microcontroller I/O protection, and battery-powered sensor interface circuits.
For engineers reviewing the BZX585-B9V1,115 datasheet, BZX585-B9V1,115 pinout, BZX585-B9V1,115 application, or BZX585-B9V1,115 equivalent, key selection criteria include its 9.1 V Zener voltage tolerance, 20 Ω typical differential resistance at 5 mA, −3.5 to +5.2 mV/K temperature coefficient range, and ultra-small SOD523 footprint for space-constrained PCB layouts.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying current loads. Its low 20 Ω differential resistance ensures minimal voltage deviation over 1–10 mA operating range, while the ±2 % tolerance enables tight regulation without post-production trimming.
The device features a cathode-marked SOD523 package optimized for reflow soldering on FR4 PCBs with ≥35 mm² copper area at the cathode tab, delivering 65 K/W junction-to-solder-point thermal resistance for reliable power handling up to 300 mW at 25 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1 V nominal at IZ = 5 mA; defines precise clamping/reference point in voltage-sensitive circuits |
| Tolerance | ±2 %; enables use in applications requiring tighter regulation than standard ±5 % Zeners |
| Differential Resistance (rdiff) | 20 Ω typical at IZ = 5 mA; ensures <100 mV output shift over ±2 mA load variation |
| Total Power Dissipation (Ptot) | 300 mW at Tamb = 25 °C on FR4 with 35 mm² cathode copper; sets continuous DC power limit |
| Non-repetitive Peak Reverse Power (PZSM) | 40 W at tp = 100 µs square wave; supports transient surge suppression in ESD-prone interfaces |
| Forward Voltage (VF) | 1.1 V max at IF = 100 mA; defines conduction loss when used in series forward-biased configurations |
| Junction Temperature Range | −65 °C to +150 °C; permits operation in extended industrial and automotive-adjacent environments |
Pinout & Package
SOD523 (SC-79) ultra-small flat-lead surface-mount 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 for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; reverse-biased during Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-compact SOD523 footprint | Enables placement in high-density layouts where 0603 or larger packages are prohibitive |
| Low differential resistance | 20 Ω typical improves regulation stability in low-current reference paths (e.g., ADC bias networks) |
| Controlled temperature coefficient | −3.5 to +5.2 mV/K allows predictable drift compensation in temperature-critical references |
| High surge robustness | 40 W non-repetitive peak power rating supports transient suppression in I/O line protection |
| Two-tolerance option | ±2 % grade provides tighter initial accuracy than ±5 % variants for precision analog designs |
Applications
| Power Supply Rail Clamp | Microcontroller I/O Protection |
|---|---|
|
Use Scenario: Clamping 3.3 V or 5 V supply rails against overvoltage transients in portable electronics. IC Role / Device Role / Timing Role: Zener diode connected between rail and ground, conducting only during overvoltage events. Use Value: Limits rail excursion to ≤9.1 V + diode forward drop, preventing damage to downstream LDOs or logic ICs. |
Use Scenario: Protecting GPIO pins of ARM Cortex-M microcontrollers from ESD or bus contention. IC Role / Device Role / Timing Role: Bidirectional clamp formed with series resistor and BZX585-B9V1,115 to ground. Use Value: Absorbs >40 W surges for 100 µs without degradation, maintaining pin integrity per IEC 61000-4-2 Level 4. |
| Low-Power Sensor Reference | ADC Input Bias Network |
|
Use Scenario: Providing stable 9.1 V reference for op-amp-based signal conditioning of thermistor or RTD sensors. IC Role / Device Role / Timing Role: Shunt regulator supplying bias current to instrumentation amplifier feedback network. Use Value: Delivers ±2 % accuracy and <0.1 %/°C drift contribution over −40 °C to +85 °C operating range. |
Use Scenario: Setting mid-rail bias voltage for single-supply op-amps driving SAR ADC inputs. IC Role / Device Role / Timing Role: Zener referenced to ground, buffered via unity-gain op-amp to drive ADC input impedance. Use Value: 20 Ω rdiff ensures <5 mV error under 250 µA load, preserving 12-bit ADC accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5240BS-7-F | 9.1 V, ±5 % tolerance, SOT-323 package, 200 mW Ptot | Larger footprint and looser tolerance reduce suitability for high-accuracy, space-constrained designs | Select when cost sensitivity outweighs precision and board area requirements |
| BZX384-B9V1,115 | 9.1 V, ±2 %, SOD-323 package, 300 mW Ptot, 30 Ω rdiff | Higher differential resistance increases regulation error under load variation | Prefer for legacy designs using SOD-323 footprints where 10 Ω higher rdiff is acceptable |
Compared with MMBZ5240BS-7-F and BZX384-B9V1,115, the BZX585-B9V1,115 delivers superior regulation accuracy and smaller size-critical for modern wearables and IoT nodes-while maintaining identical power handling and thermal performance on compatible PCB layouts.
Availability
BZX585-B9V1,115 is available at Aetrix Electronics and suitable for low-power sensor interfaces, microcontroller I/O protection, and compact voltage reference circuits requiring stable component supply across production volumes.
Supply support for BZX585-B9V1,115 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 focused on high-volume, high-reliability discrete and logic devices, with leadership in advanced packaging and automotive-qualified components.
The BZX585 series belongs to Nexperia's general-purpose Zener diode product line, engineered for precision voltage regulation and transient suppression in consumer, industrial, and communication equipment where miniaturization and parametric consistency are critical.
FAQ
What is the maximum continuous reverse current for BZX585-B9V1,115 at 25 °C ambient?
The device supports up to 200 mA forward current, but its continuous reverse (Zener) current is limited by thermal design. At 25 °C ambient on an FR4 PCB with 35 mm² cathode copper, the 300 mW power limit corresponds to approximately 33 mA at 9.1 V, assuming negligible forward drop. Derating is required above 25 °C per the 350 K/W junction-to-ambient thermal resistance.
How does the cathode marking appear on the SOD523 package?
A distinct dark bar is printed on the top surface of the SOD523 package adjacent to pin 1, which is the cathode terminal. This marking aligns with the standardized SC-79 outline and is visible under 10× magnification; it must be oriented toward the regulated node during PCB layout to ensure correct reverse-bias operation.
Can BZX585-B9V1,115 replace BZX585-C9V1,115 in a design?
No-BZX585-C9V1,115 has ±5 % tolerance (8.65–9.56 V), while BZX585-B9V1,115 is ±2 % (8.92–9.28 V). Substituting introduces up to 0.33 V additional uncertainty in regulation voltage, potentially violating system-level accuracy specs in precision references or clamps. The parts share identical package and thermal specs but differ in voltage distribution.
What is the typical Zener impedance at 1 mA for this part?
Per Table 8, the typical differential resistance (rdiff) at IZ = 1 mA is 100 Ω. This value reflects dynamic impedance near the knee of the Zener curve and impacts regulation stability under light-load conditions, such as in high-impedance bias networks where current may dip below 5 mA.
BZX585-B9V1,115 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):
- 9.1 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 10 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 6 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-B9V1,115 FAQ
1.How can I place an order for BZX585-B9V1,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX585-B9V1,115 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-B9V1,115 reliable?
The price and inventory of BZX585-B9V1,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX585-B9V1,115 is usually 5 days.
3.What payment methods are accepted for BZX585-B9V1,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX585-B9V1,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX585-B9V1,115?
BZX585-B9V1,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX585-B9V1,115 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-B9V1,115?
For technical support, including BZX585-B9V1,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX585-B9V1,115 requirements.
6.How does Aetrix verify that BZX585-B9V1,115 is sourced from the original manufacturer or authorized distributors?
All BZX585-B9V1,115 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-B9V1,115 meets industry standards.
7.What is the process for return or replacement of BZX585-B9V1,115?
All BZX585-B9V1,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX585-B9V1,115, 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-B9V1,115 part is unused and in its original packaging.
Return procedure for BZX585-B9V1,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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