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Nexperia USA Inc. BZX585-C7V5,135
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- Part No.:
- BZX585-C7V5,135
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX585-C7V5,135.pdf
- Description:
- DIODE ZENER 7.5V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:9,561
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Product details
Overview
BZX585-C7V5 from Nexperia is a 7.5 V ±5 % Zener voltage regulator diode in SOD523 (SC-79) package, rated for 300 mW total power dissipation and 40 W non-repetitive peak reverse power, used for precision low-power voltage reference and overvoltage clamping in space-constrained analog front-ends and power supply feedback loops.
For engineers reviewing the BZX585-C7V5 datasheet, BZX585-C7V5 pinout, BZX585-C7V5 application, or BZX585-C7V5 equivalent, this page delivers verified Zener voltage, differential resistance, temperature coefficient, thermal resistance, and cathode/anode terminal mapping - all confirmed from Nexperia's Rev. 8 product data sheet dated 6 August 2026.
Technical Context
This Zener diode operates in reverse breakdown with a nominal Zener voltage of 7.5 V at IZ = 5 mA, exhibiting a typical differential resistance of 15 Ω and a positive temperature coefficient of +2.5 to +3.6 mV/K across its operating current range. Its low 1.1 V forward voltage at 100 mA supports bidirectional transient suppression when combined with series blocking elements.
Designed for surface-mount use on FR4 PCBs with ≥35 mm² copper area at the cathode tab, it achieves Rth(j-a) = 350 K/W and Rth(j-sp) = 65 K/W, enabling reliable operation up to 150 °C junction temperature under pulsed surge conditions (tp = 100 µs, square wave).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.13 V to 7.88 V at IZ = 5 mA - defines stable regulation point with ±5 % tolerance band. |
| Differential Resistance (rdiff) | 15 Ω typ. at IZ = 5 mA - determines output impedance and load regulation error in reference circuits. |
| Temperature Coefficient (SZ) | +2.5 to +3.6 mV/K - quantifies VZ drift per degree Celsius, critical for temperature-stable references. |
| Total Power Dissipation (Ptot) | 300 mW at Tamb = 25 °C on FR4 with 35 mm² Cu - sets continuous DC power limit for thermal design. |
| Non-repetitive Peak Power (PZSM) | 40 W for tp = 100 µs square wave - enables short-duration surge clamping without failure. |
| Reverse Current (IR) | ≤1.0 µA at VR = 5.3 V - ensures minimal leakage below knee voltage in standby mode. |
| Forward Voltage (VF) | 1.1 V max at IF = 100 mA - supports use as bidirectional clamp when paired with series resistor. |
Pinout & Package
SOD523 (SC-79) ultra-small flat-lead 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; carries reverse current during Zener conduction; marked by bar on package. |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path for regulation/clamping function. |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMD package | SOD523 footprint (1.25 × 0.85 mm) enables placement in high-density PCB layouts where height < 0.65 mm is required. |
| Stable Zener voltage tolerance | ±5 % tolerance (C-series) ensures predictable regulation threshold without post-production trimming. |
| Controlled temperature coefficient | +2.5 to +3.6 mV/K allows predictable VZ drift compensation in temperature-critical references. |
| High surge robustness | 40 W non-repetitive peak power rating supports ESD and transient suppression in I/O protection networks. |
| Low differential resistance | 15 Ω typical rdiff minimizes output voltage variation under changing load current in feedback paths. |
Applications
| Power Supply Feedback Reference | Overvoltage Clamp for MCU I/O |
|---|---|
|
Use Scenario: Stabilizing feedback voltage in isolated DC-DC converter secondary-side TL431-like shunt regulator circuits. IC Role / Device Role / Timing Role: Zener diode provides precise 7.5 V reference to optocoupler input, setting output voltage accuracy. Use Value: ±5 % VZ tolerance and 15 Ω rdiff ensure ≤1.5 % output voltage drift across line/load/temperature. |
Use Scenario: Protecting 3.3 V or 5 V microcontroller GPIO pins against accidental 12 V miswiring or inductive kickback. IC Role / Device Role / Timing Role: Reverse-biased BZX585-C7V5 clamps transients above 7.5 V while limiting peak current via series resistor. Use Value: 40 W surge rating absorbs 100 µs spikes without degradation; 1.0 µA leakage avoids false triggering in high-impedance inputs. |
| Low-Power Sensor Biasing | Reference Voltage for ADC Input Scaling |
|
Use Scenario: Providing stable bias voltage to analog sensor signal conditioning stages in battery-powered IoT nodes. IC Role / Device Role / Timing Role: Acts as low-current Zener reference (IZ = 1–5 mA) for op-amp bias networks and current sources. Use Value: 300 mW Ptot and +2.5 mV/K SZ enable accurate 7.5 V bias over −40 °C to +85 °C ambient range. |
Use Scenario: Generating a known reference for scaling full-scale input range of 12-bit SAR ADCs in industrial monitoring systems. IC Role / Device Role / Timing Role: Supplies fixed 7.5 V to ADC reference pin or resistive divider network to define measurement span. Use Value: Low 15 Ω rdiff prevents loading-induced error; ±5 % tolerance aligns with 0.5 % system-level calibration budget. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5227BS-7-F (Diodes Inc.) | 7.5 V ±5 %, SOT-323 package (1.7 × 1.3 mm), 350 mW Ptot, rdiff = 23 Ω typ. | Larger footprint and higher rdiff reduce regulation accuracy but improve thermal margin in high-ambient environments. | Select when board layout allows larger package and higher power derating is needed over extended temperature range. |
| BZX384-C7V5 (Nexperia) | 7.5 V ±5 %, SOD-323 package (1.7 × 1.3 mm), 300 mW Ptot, rdiff = 20 Ω typ., Rth(j-a) = 420 K/W. | Same electrical specs but 35 % larger footprint and 20 % higher thermal resistance limit high-frequency pulse handling. | Choose only if SOD-323 is already standardized in production and SOD523 rework is not feasible. |
Compared with MMBZ5227BS-7-F and BZX384-C7V5, the BZX585-C7V5 offers the smallest footprint and lowest differential resistance in its voltage class, making it optimal for miniaturized, high-accuracy regulation where board space and regulation error are primary constraints.
Availability
BZX585-C7V5 is available at Aetrix Electronics and suitable for power supply feedback reference, overvoltage clamp for MCU I/O, and low-power sensor biasing requiring stable component supply, consistent parametric performance, and long-term obsolescence management.
Supply support for BZX585-C7V5 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 with focus on efficiency, miniaturization, and automotive-grade quality.
The BZX585 series belongs to Nexperia's general-purpose Zener diode portfolio, engineered for compact, cost-effective voltage regulation and transient protection in consumer, industrial, and communications equipment.
FAQ
What is the maximum continuous reverse current for BZX585-C7V5 at 25 °C?
The device has no specified maximum continuous reverse current; instead, its DC power limit is defined by Ptot = 300 mW. At VZ ≈ 7.5 V, this corresponds to IZ ≤ 40 mA for continuous operation - exceeding this risks thermal runaway due to junction temperature rise beyond 150 °C.
Can BZX585-C7V5 be used in bidirectional ESD protection configurations?
No - it is a unidirectional Zener diode optimized for reverse-bias regulation. For bidirectional ESD protection, a dedicated TVS diode such as PESD5V0S1BA is required. Using two BZX585-C7V5 diodes in series opposition adds excessive forward drop and lacks specified clamping symmetry.
How does the cathode marking appear on the SOD523 package?
The cathode is indicated by a single dark bar printed on the top surface of the SOD523 package, aligned with Pin 1. The physical outline shows Pin 1 (cathode) on the left and Pin 2 (anode) on the right when the marking bar is oriented toward the viewer's left side.
Is BZX585-C7V5 suitable for automotive applications?
No - this part is not AEC-Q200 qualified. Nexperia explicitly states in its legal disclaimers that non-automotive qualified products like BZX585-C7V5 are unsuitable for safety-critical or life-support systems, and inclusion in automotive designs voids warranty and incurs full customer liability.
BZX585-C7V5,135 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):
- 7.5 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 10 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 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-C7V5,135 FAQ
1.How can I place an order for BZX585-C7V5,135 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX585-C7V5,135 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-C7V5,135 reliable?
The price and inventory of BZX585-C7V5,135 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX585-C7V5,135 is usually 5 days.
3.What payment methods are accepted for BZX585-C7V5,135?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX585-C7V5,135 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX585-C7V5,135?
BZX585-C7V5,135 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX585-C7V5,135 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-C7V5,135?
For technical support, including BZX585-C7V5,135 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX585-C7V5,135 requirements.
6.How does Aetrix verify that BZX585-C7V5,135 is sourced from the original manufacturer or authorized distributors?
All BZX585-C7V5,135 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-C7V5,135 meets industry standards.
7.What is the process for return or replacement of BZX585-C7V5,135?
All BZX585-C7V5,135 units undergo pre-shipment inspection (PSI). If there is an issue with BZX585-C7V5,135, 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-C7V5,135 part is unused and in its original packaging.
Return procedure for BZX585-C7V5,135:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX585-C7V5,135 Tags
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