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Nexperia USA Inc. BZX585-C9V1,135
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- Part No.:
- BZX585-C9V1,135
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX585-C9V1,135.pdf
- Description:
- DIODE ZENER 9.1V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:9,850
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Product details
Overview
BZX585-C9V1,135 from Nexperia is a ±5 % tolerance Zener diode in SOD523 (SC-79) package, rated for 9.1 V nominal reverse breakdown voltage at 5 mA, 300 mW total power dissipation, and 40 W non-repetitive peak reverse power. It delivers low differential resistance (20 Ω typ. at IZ = 5 mA) and operates across −65 °C to +150 °C junction temperature, supporting precision voltage reference and overvoltage clamping in space-constrained consumer and industrial PCBs.
For engineers reviewing the BZX585-C9V1,135 datasheet, BZX585-C9V1,135 pinout, BZX585-C9V1,135 application, or BZX585-C9V1,135 equivalent, key selection criteria include its 9.1 V Zener voltage tolerance, thermal resistance (Rth(j-sp) = 65 K/W), cathode-marked SOD523 footprint, and suitability for low-power regulation in battery-powered sensors and USB interface protection circuits.
Technical Context
This Zener diode operates in reverse-biased avalanche mode with a specified 9.1 V nominal breakdown voltage at 5 mA test current. Its temperature coefficient of +3.8 mV/K at IZ = 5 mA indicates positive drift with rising junction temperature, enabling predictable biasing in temperature-stable references.
The device features ultra-small SOD523 packaging with two terminals (anode and cathode), optimized for high-density layouts. Its 120 pF diode capacitance at 0 V and 0.5 µA max reverse leakage at 7.3 V support stable DC regulation without significant AC coupling effects in signal-path applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1 V nominal at IZ = 5 mA; defines precise DC reference level for regulation or clamping |
| Tolerance | ±5 %; ensures voltage accuracy within ±0.455 V for production-level consistency |
| Differential Resistance (rdiff) | 20 Ω typical at IZ = 5 mA; determines load regulation error under varying current |
| Total Power Dissipation (Ptot) | 300 mW at Tamb = 25 °C on FR4 PCB with 35 mm² copper; sets continuous thermal operating limit |
| Non-repetitive Peak Reverse Power (PZSM) | 40 W for tp = 100 µs square wave; enables transient surge suppression in ESD-prone interfaces |
| Thermal Resistance (Rth(j-sp)) | 65 K/W from junction to solder point; informs thermal design margin when mounted on PCB |
| Reverse Leakage (IR) | 0.5 µA max at VR = 7.3 V; guarantees minimal quiescent current in standby regulation |
Pinout & Package
Package: SOD523 (SC-79), ultra-small flat-lead surface-mount plastic package with cathode marked by bar on top surface. Dimensions: 1.25 mm × 0.85 mm × 0.65 mm (L × W × H), 0.34 mm lead pitch.
| 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; completes reverse-bias path during Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-compact SOD523 footprint | Enables placement in <1.1 mm² board area-critical for wearables and miniaturized IoT nodes |
| Low differential resistance | 20 Ω typical improves regulation stability against load current variations up to ±10 mA |
| Controlled temperature coefficient | +3.8 mV/K allows predictable voltage shift in ambient ranges from −40 °C to +85 °C |
| High surge robustness | 40 W non-repetitive peak power withstands IEC 61000-4-2 Level 4 ESD events without degradation |
| Low reverse leakage | ≤0.5 µA at 80 % of VZ minimizes standby power loss in always-on sensor circuits |
Applications
| USB Interface Protection | Low-Power Sensor Reference |
|---|---|
|
Use Scenario: Clamping transient voltages on USB D+ and D− lines during hot-plug or ESD events. IC Role / Device Role / Timing Role: Zener diode acting as bidirectional shunt clamp between data line and ground. Use Value: 9.1 V breakdown prevents damage to 3.3 V USB transceivers while maintaining signal integrity via 120 pF capacitance. |
Use Scenario: Providing stable bias voltage for analog front-end amplifiers in battery-operated environmental sensors. IC Role / Device Role / Timing Role: Precision DC reference source for ADC input scaling and op-amp offset compensation. Use Value: ±5 % tolerance and +3.8 mV/K TC ensure reference drift remains under ±20 mV over −25 °C to +70 °C operating range. |
| Microcontroller Reset Circuit | LED Current Regulation |
|
Use Scenario: Generating clean reset threshold for 3.3 V microcontrollers during brown-out conditions. IC Role / Device Role / Timing Role: Zener-based voltage detector feeding comparator input in power-monitoring circuit. Use Value: 300 mW Ptot and 65 K/W Rth(j-sp) allow reliable operation without heatsinking in compact MCU modules. |
Use Scenario: Setting constant forward current for indicator LEDs in portable medical devices. IC Role / Device Role / Timing Role: Shunt regulator maintaining fixed voltage drop across current-setting resistor. Use Value: 20 Ω rdiff limits current variation to <±1.5 mA across 2.5–3.6 V supply range, ensuring consistent LED brightness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX585-B9V1,135 | ±2 % tolerance (vs. ±5 %); tighter VZ spec but identical package and thermal specs | Preferred where reference accuracy > ±0.2 V is required, e.g., calibration circuits | Select when higher initial accuracy justifies cost premium and tighter TC spread (+3.2 to +4.4 mV/K) |
| MMSZ5240B-7-F | SOD-123 package (2.7 × 1.4 mm); 9.1 V ±5 %, 500 mW Ptot, 30 Ω rdiff | Higher power handling but 2.3× larger footprint; unsuitable for ultra-dense layouts | Choose only if thermal margin requires >300 mW continuous dissipation or legacy SOD-123 compatibility is mandatory |
Compared with BZX585-B9V1,135, the C-series offers relaxed tolerance at lower cost and identical thermal performance; versus MMSZ5240B-7-F, it trades power headroom for 60 % board area reduction-critical in sub-10 mm² wearable PCBs.
Availability
BZX585-C9V1,135 is available at Aetrix Electronics and suitable for USB interface protection, low-power sensor reference, microcontroller reset circuits, and LED current regulation requiring stable component supply across high-mix, low-volume production runs.
Supply support for BZX585-C9V1,135 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, serving automotive, industrial, and consumer markets with ISO/TS 16949-certified manufacturing.
The BZX585 series targets general-purpose voltage regulation in space-constrained applications, emphasizing ultra-small packaging, tight parametric control, and robust surge immunity for modern portable electronics.
FAQ
What is the maximum continuous reverse current for BZX585-C9V1,135 at 25 °C ambient?
The device supports a maximum continuous forward current of 200 mA per Absolute Maximum Ratings, but for Zener operation, the recommended DC reverse current is limited to 5 mA for nominal VZ specification. At 300 mW Ptot, sustained reverse current must remain ≤33 mA to avoid exceeding thermal limits on standard FR4 PCBs.
How does the cathode marking appear on the SOD523 package?
A single dark bar printed on the top surface of the SOD523 package identifies Pin 1 as the cathode. This marking aligns with the package outline drawing in Figure 11 of the datasheet and matches the "K" designation in Table 2's pinning information.
Can BZX585-C9V1,135 be used in place of a 9.1 V Zener in an existing SOD-123 design?
No-it uses the smaller SOD523 (SC-79) footprint (1.25 × 0.85 mm) versus SOD-123 (2.7 × 1.4 mm). Direct replacement requires PCB redesign, including new solder pads, stencil apertures, and reflow profile validation due to differing thermal mass and solder wetting behavior.
What is the typical Zener voltage drift over the full −65 °C to +150 °C junction temperature range?
Based on Figure 7 in the datasheet, the temperature coefficient is +3.8 mV/K at IZ = 5 mA. Over a 215 K span, this yields ~817 mV total drift-approximately ±4.5 % of nominal 9.1 V. Actual drift is nonlinear and minimized near room temperature where most applications operate.
BZX585-C9V1,135 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):
- 9.1 V
- Tolerance:
- ±5%
- 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-C9V1,135 FAQ
1.How can I place an order for BZX585-C9V1,135 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX585-C9V1,135 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-C9V1,135 reliable?
The price and inventory of BZX585-C9V1,135 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX585-C9V1,135 is usually 5 days.
3.What payment methods are accepted for BZX585-C9V1,135?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX585-C9V1,135 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX585-C9V1,135?
BZX585-C9V1,135 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX585-C9V1,135 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-C9V1,135?
For technical support, including BZX585-C9V1,135 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX585-C9V1,135 requirements.
6.How does Aetrix verify that BZX585-C9V1,135 is sourced from the original manufacturer or authorized distributors?
All BZX585-C9V1,135 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-C9V1,135 meets industry standards.
7.What is the process for return or replacement of BZX585-C9V1,135?
All BZX585-C9V1,135 units undergo pre-shipment inspection (PSI). If there is an issue with BZX585-C9V1,135, 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-C9V1,135 part is unused and in its original packaging.
Return procedure for BZX585-C9V1,135:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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