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Nexperia USA Inc. BZX585-B9V1,135
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- Part No.:
- BZX585-B9V1,135
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX585-B9V1,135.pdf
- Description:
- DIODE ZENER 9.1V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:7,796
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Product details
Overview
BZX585-B9V1,135 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 delivers low differential resistance (20 Ω typ. at IZ = 5 mA) and operates across −65 °C to +150 °C junction temperature, serving as a precision voltage reference in compact power management circuits.
For engineers reviewing the BZX585-B9V1,135 datasheet, BZX585-B9V1,135 pinout, BZX585-B9V1,135 application, or BZX585-B9V1,135 equivalent, this device is selected for space-constrained 9.1 V regulation, low-current biasing, and transient-suppressed reference generation where thermal resistance to solder point (65 K/W) and cathode-marked polarity are critical layout considerations.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified nominal Zener voltage of 9.1 V at 5 mA test current, exhibiting a temperature coefficient of +3.8 mV/K (typ.) that ensures predictable drift over temperature. Its differential resistance of 20 Ω (typ.) at 5 mA enables stable regulation under small-signal load variations.
The device uses a planar epitaxial silicon process optimized for tight voltage tolerance and low leakage, with reverse current limited to 0.5 µA max at 7.3 V and 150 °C. Its ultra-small SOD523 footprint supports high-density PCB layouts while maintaining thermal resistance from junction to solder point at 65 K/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1 V nominal at IZ = 5 mA; defines precise regulation point for reference and clamp circuits |
| Tolerance | ±2 %; ensures tight voltage accuracy without post-production trimming |
| Differential Resistance (rdiff) | 20 Ω typical at IZ = 5 mA; minimizes output voltage variation under load changes |
| 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 Power (PZSM) | 40 W for tp = 100 µs square wave; enables short-duration surge clamping |
| Reverse Current (IR) | 0.5 µA max at VR = 7.3 V and Tj = 150 °C; guarantees low leakage in high-impedance bias networks |
| Junction Temperature Range | −65 °C to +150 °C; supports operation in extended industrial and automotive-adjacent environments |
Pinout & Package
SOD523 (SC-79) ultra-small flat-lead surface-mount plastic package with cathode band marking; dimensions: 1.25 mm × 0.85 mm × 0.65 mm (L × W × H), 2-terminal configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marked by bar on package; carries reverse-biased current during regulation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path for Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-compact SMD package | SOD523 footprint (1.25 × 0.85 mm) enables placement in high-density portable and IoT PCBs |
| Low differential resistance | 20 Ω typical at 5 mA improves regulation stability against load transients |
| Controlled temperature coefficient | +3.8 mV/K typical enables predictable voltage drift compensation in reference designs |
| High surge robustness | 40 W non-repetitive peak power rating supports ESD and transient suppression in input stages |
| Low leakage performance | 0.5 µA max reverse current at 7.3 V/150 °C maintains accuracy in high-impedance feedback paths |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
|
Use Scenario: Providing stable 9.1 V reference for LDO feedback divider or ADC reference buffer in battery-powered sensor nodes. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to fix reference potential independent of supply variation. Use Value: ±2 % tolerance and 20 Ω rdiff ensure <10 mV error across 0–1 mA load range, enabling 12-bit ADC accuracy without trimming. |
Use Scenario: Protecting microcontroller GPIO pins from 12 V rail transients in automotive body control modules. IC Role / Device Role / Timing Role: Transient voltage suppressor clamping excursions above 9.1 V to safe levels before IC damage occurs. Use Value: 40 W peak power handling (100 µs) absorbs ISO 7637-2 pulse 1/2a surges without degradation, preserving system reliability. |
| Current Source Bias | Signal Level Shifting |
|
Use Scenario: Generating stable bias current for op-amp input stage in precision analog front-ends. IC Role / Device Role / Timing Role: Fixed-voltage drop element establishing constant current through series resistor into high-impedance node. Use Value: Low 0.5 µA leakage at 150 °C prevents bias current drift in thermally stressed industrial enclosures. |
Use Scenario: Shifting logic-level signals between 3.3 V and 5 V domains in mixed-voltage FPGA interfaces. IC Role / Device Role / Timing Role: Clamping diode limiting signal swing to 9.1 V + VF (≈10.2 V) to prevent overvoltage on 12 V tolerant receivers. Use Value: Cathode-band polarity marking ensures correct orientation during automated placement, eliminating reverse-bias failure in volume production. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX585-C9V1,135 | ±5 % tolerance (vs. ±2 %); identical package, VZ, Ptot, and rdiff | Acceptable where cost sensitivity outweighs precision requirement | Select when budget constraints dominate and 9.1 V ±0.455 V variation is acceptable |
| MMSZ5240B-7-F | Same 9.1 V nominal but SOD-123 package (2.7 × 1.4 mm); 500 mW Ptot; 10 Ω rdiff | Higher power and lower impedance, but occupies >3× board area | Choose only if thermal margin or regulation stiffness demands higher Ptot and smaller rdiff, accepting larger footprint |
Compared with BZX585-C9V1,135, the BZX585-B9V1,135 provides tighter voltage control essential for metrology-grade references; versus MMSZ5240B-7-F, it trades 20 Ω rdiff and 300 mW rating for 60 % smaller PCB area-critical in wearables and miniaturized edge devices.
Availability
BZX585-B9V1,135 is available at Aetrix Electronics and suitable for precision voltage reference, overvoltage protection, and current-source biasing requiring stable component supply in high-volume consumer, industrial, and automotive-adjacent electronics.
Supply support for BZX585-B9V1,135 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-performance, reliable standard-logic and power devices, with leadership in discrete, logic, and MOSFET technologies.
The BZX585 series belongs to Nexperia's general-purpose Zener diode product line, engineered for compact, high-accuracy voltage regulation in space-constrained and thermally demanding applications.
FAQ
What is the maximum continuous forward current for BZX585-B9V1,135?
The absolute maximum forward current is 200 mA per the limiting values table. However, forward conduction is not its intended operating mode; sustained forward bias above 100 mA risks thermal overstress due to VF ≈ 1.1 V and limited 300 mW power dissipation capacity.
Can BZX585-B9V1,135 be used in parallel for higher power dissipation?
No-Zener diodes exhibit negative temperature coefficients below ~5 V and positive above, causing current hogging and thermal runaway when paralleled. The BZX585-B9V1,135 has +3.8 mV/K coefficient, making forced current sharing impractical without individual ballast resistors.
How does the SOD523 package affect thermal performance compared to SOD-123?
The SOD523 package has higher thermal resistance: Rth(j-a) = 350 K/W vs. ~250 K/W for SOD-123. Its Rth(j-sp) = 65 K/W relies heavily on cathode-tab solder connection; inadequate copper area (<35 mm²) reduces effective power handling below 300 mW.
Is BZX585-B9V1,135 suitable for automotive applications?
No-this part is not AEC-Q200 qualified. While its −65 °C to +150 °C junction rating meets ambient extremes, Nexperia explicitly states non-automotive qualification in legal disclaimers; automotive use requires explicit AEC-Q200 validation and PPAP documentation.
BZX585-B9V1,135 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:
- ±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-B9V1,135 FAQ
1.How can I place an order for BZX585-B9V1,135 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX585-B9V1,135 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-B9V1,135 reliable?
The price and inventory of BZX585-B9V1,135 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX585-B9V1,135 is usually 5 days.
3.What payment methods are accepted for BZX585-B9V1,135?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX585-B9V1,135 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX585-B9V1,135?
BZX585-B9V1,135 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX585-B9V1,135 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-B9V1,135?
For technical support, including BZX585-B9V1,135 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX585-B9V1,135 requirements.
6.How does Aetrix verify that BZX585-B9V1,135 is sourced from the original manufacturer or authorized distributors?
All BZX585-B9V1,135 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-B9V1,135 meets industry standards.
7.What is the process for return or replacement of BZX585-B9V1,135?
All BZX585-B9V1,135 units undergo pre-shipment inspection (PSI). If there is an issue with BZX585-B9V1,135, 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-B9V1,135 part is unused and in its original packaging.
Return procedure for BZX585-B9V1,135:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX585-B9V1,135 Tags
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MM5Z5V1ST1G
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