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Nexperia USA Inc. BZX585-B7V5,135
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- Part No.:
- BZX585-B7V5,135
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX585-B7V5,135.pdf
- Description:
- DIODE ZENER 7.5V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:8,804
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Product details
Overview
BZX585-B7V5,135 from Nexperia is a 7.5 V ±2 % Zener voltage regulator diode in an SOD523 (SC-79) ultra-small surface-mount 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 consumer and industrial power rails.
For engineers reviewing the BZX585-B7V5,135 datasheet, BZX585-B7V5,135 pinout, BZX585-B7V5,135 application, or BZX585-B7V5,135 equivalent, this device is selected for stable 7.5 V regulation at 5 mA test current, low 15 Ω differential resistance, and tight ±2 % tolerance-critical for feedback loops in DC-DC converters and voltage monitoring circuits where board area and thermal budget are constrained.
Technical Context
This Zener diode operates in reverse breakdown to maintain a stable 7.5 V reference across its cathode–anode terminals under controlled bias conditions. Its 15 Ω typical differential resistance at IZ = 5 mA ensures minimal output voltage variation with load current changes, while its +2.5 mV/K temperature coefficient enables predictable drift compensation in ambient-temperature-varying environments.
The device supports pulsed surge handling up to 40 W (100 µs square wave, Tj = 25 °C), with a maximum forward voltage of 1.1 V at 100 mA, and is characterized for operation from −65 °C to +150 °C junction temperature, making it suitable for both steady-state regulation and transient suppression roles in compact power management stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener voltage (VZ) | 7.35 V to 7.65 V at IZ = 5 mA - defines nominal regulation point with ±2 % tolerance for accurate voltage reference design |
| Differential resistance (rdiff) | 15 Ω typical at IZ = 5 mA - determines output impedance and load regulation error in feedback networks |
| Temperature coefficient (SZ) | +2.5 mV/K at IZ = 5 mA - quantifies voltage drift per degree Celsius for thermal stability analysis |
| Total power dissipation (Ptot) | 300 mW at Tamb = 25 °C on FR4 PCB with 35 mm² copper - sets continuous thermal limit for PCB layout and derating |
| Non-repetitive peak reverse power (PZSM) | 40 W at tp = 100 µs - defines single-pulse surge energy handling capability for ESD/transient clamping |
| Reverse current (IR) | ≤ 1.0 µA at VR = 5.3 V - specifies leakage level below breakdown, critical for low-power standby circuits |
| Forward voltage (VF) | 1.1 V max at IF = 100 mA - constrains conduction loss when used in series or bidirectional protection configurations |
Pinout & Package
SOD523 (SC-79) plastic surface-mounted package with 2 leads; dimensions: 1.25 mm × 0.85 mm × 0.65 mm (L × W × H); cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity-sensitive terminal where Zener breakdown occurs; marked by bar on package |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path required for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SOD523 footprint | Enables placement in high-density layouts where board space is limited to <1.1 mm² per device |
| ±2 % Zener voltage tolerance | Reduces need for post-production trimming in precision reference applications such as ADC voltage references |
| Low 15 Ω differential resistance | Minimizes output voltage shift under ±1 mA load variation, improving regulation accuracy in feedback paths |
| 40 W non-repetitive surge rating | Provides robustness against short-duration transients without external TVS, simplifying protection circuitry |
| −65 °C to +150 °C operating range | Supports deployment in automotive under-hood, industrial motor control, and outdoor electronics without derating |
Applications
| Power Supply Feedback Reference | Overvoltage Clamp in USB Port |
|---|---|
|
Use Scenario: Stabilizing output voltage of a 12 V buck converter via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Zener diode provides precise 7.5 V reference to TL431 shunt regulator input, setting converter output voltage. Use Value: Tight ±2 % tolerance and low 15 Ω rdiff ensure output accuracy remains within ±1.2 % over line/load/temperature, meeting Class II power supply specs. |
Use Scenario: Protecting downstream 5 V logic from accidental 12 V insertion into USB Type-A receptacle. IC Role / Device Role / Timing Role: Connected between VBUS and GND to clamp surges above 7.5 V before they reach USB controller IC. Use Value: 40 W pulse rating absorbs 100 µs transients up to 12 V × 3.3 A without failure, preventing latch-up in connected SoCs. |
| Low-Power Sensor Biasing | Microcontroller Reset Threshold |
|
Use Scenario: Providing stable 7.5 V bias to a MEMS pressure sensor's analog front-end in battery-powered IoT node. IC Role / Device Role / Timing Role: Zener supplies regulated excitation voltage to sensor bridge, referenced to system ground. Use Value: Sub-µA leakage at 5.3 V ensures <10 nA quiescent current draw during sleep mode, extending 10-year battery life. |
Use Scenario: Generating a clean reset signal for an ARM Cortex-M0+ MCU when main 3.3 V rail drops below safe operating voltage. IC Role / Device Role / Timing Role: Used in comparator-based reset circuit with resistor divider to detect 3.3 V rail collapse. Use Value: Predictable +2.5 mV/K temperature coefficient allows accurate thermal compensation of reset threshold across −40 °C to +85 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX585-C7V5,135 | ±5 % tolerance (vs. ±2 %), same 7.5 V nominal, identical SOD523 package and thermal specs | Acceptable where cost sensitivity outweighs precision requirement; higher IR at VR = 5.3 V (≤3.0 µA vs. ≤1.0 µA) | Select for cost-driven consumer designs where ±5 % regulation is sufficient and leakage is not critical |
| MMSZ5231B-7-F | Same 7.5 V nominal, ±5 % tolerance, SOD-123 package (2.7 × 1.4 mm), Ptot = 500 mW | Larger footprint but higher continuous power; rdiff = 30 Ω typical - less stable under dynamic load | Choose when board area permits and higher continuous dissipation (500 mW) is needed for sustained clamping duty |
Compared with BZX585-C7V5,135, the BZX585-B7V5,135 offers tighter tolerance and lower leakage for precision references; versus MMSZ5231B-7-F, it trades off power headroom for 55 % smaller footprint and better regulation stability-making it optimal for miniaturized, accuracy-critical designs.
Availability
BZX585-B7V5,135 is available at Aetrix Electronics and suitable for DC-DC converter feedback networks, USB port overvoltage protection, low-power sensor biasing, and microcontroller reset supervision requiring stable component supply and guaranteed traceability.
Supply support for BZX585-B7V5,135 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 delivering high-performance, reliable discrete, logic, and MOSFET devices optimized for efficiency, size, and thermal performance in high-volume electronics.
The BZX585 series belongs to Nexperia's general-purpose Zener diode product line, engineered specifically for space-constrained voltage regulation and transient suppression in consumer, industrial, and computing applications.
FAQ
What is the maximum continuous reverse current this Zener can handle at 7.5 V?
The BZX585-B7V5,135 is not rated for continuous reverse current at full Zener voltage. Its maximum steady-state power dissipation is 300 mW, so at 7.5 V, the absolute maximum average reverse current is 40 mA (300 mW ÷ 7.5 V). Operation above this requires thermal derating per the Rth(j-a) = 350 K/W specification.
Can this diode be used in a bidirectional ESD protection configuration?
No - the BZX585-B7V5,135 is a unidirectional Zener diode optimized for reverse-bias regulation. Its forward voltage is 1.1 V max, but it lacks symmetric clamping characteristics or specified forward surge ratings. For bidirectional ESD protection, purpose-built TVS diodes like PESD5V0S1BA should be used instead.
How does the +2.5 mV/K temperature coefficient affect long-term voltage reference stability?
A +2.5 mV/K coefficient means the Zener voltage increases by 2.5 mV per °C rise in junction temperature. Over a 100 °C range (−40 °C to +60 °C ambient, assuming ~30 °C self-heating), this yields ~250 mV drift - approximately ±3.3 % of 7.5 V. For high-stability references, this must be compensated via circuit design or paired with negative-TC components.
Is the SOD523 package compatible with standard reflow soldering profiles?
Yes - the SOD523 package is qualified for lead-free reflow per JEDEC J-STD-020. The recommended profile includes peak temperature ≤ 260 °C for ≤ 30 seconds, with ramp rates ≤ 3 °C/s. Figure 12 in the datasheet provides the exact solder land pattern (1.4 mm × 0.5 mm pads, 0.4 mm gap) for reliable assembly yield.
BZX585-B7V5,135 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:
- ±2%
- 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-B7V5,135 FAQ
1.How can I place an order for BZX585-B7V5,135 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX585-B7V5,135 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-B7V5,135 reliable?
The price and inventory of BZX585-B7V5,135 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX585-B7V5,135 is usually 5 days.
3.What payment methods are accepted for BZX585-B7V5,135?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX585-B7V5,135 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX585-B7V5,135?
BZX585-B7V5,135 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX585-B7V5,135 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-B7V5,135?
For technical support, including BZX585-B7V5,135 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX585-B7V5,135 requirements.
6.How does Aetrix verify that BZX585-B7V5,135 is sourced from the original manufacturer or authorized distributors?
All BZX585-B7V5,135 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-B7V5,135 meets industry standards.
7.What is the process for return or replacement of BZX585-B7V5,135?
All BZX585-B7V5,135 units undergo pre-shipment inspection (PSI). If there is an issue with BZX585-B7V5,135, 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-B7V5,135 part is unused and in its original packaging.
Return procedure for BZX585-B7V5,135:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX585-B7V5,135 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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