My Inquiry
My Account
Nexperia USA Inc. BZX585-B3V0,135
.jpg)
- Part No.:
- BZX585-B3V0,135
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX585-B3V0,135.pdf
- Description:
- DIODE ZENER 3V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:7,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX585-B3V0,135 from Nexperia is a ±2 % tolerance Zener diode in SOD523 (SC-79) package, rated for 3.0 V nominal regulation voltage at 5 mA, with 325 Ω typical differential resistance and 10 µA maximum reverse current at 2.4 V, used for precision low-power voltage reference and overvoltage clamping in space-constrained consumer and industrial power rails.
For engineers reviewing the BZX585-B3V0,135 datasheet, BZX585-B3V0,135 pinout, BZX585-B3V0,135 application, or BZX585-B3V0,135 equivalent, this part supports stable 3.0 V reference generation under 200 mA forward current, handles 40 W non-repetitive surge pulses, and operates across −65 °C to +150 °C junction temperature - critical for compact DC-DC feedback networks and ESD-sensitive signal line protection.
Technical Context
This Zener diode operates in reverse breakdown mode with tightly controlled 2.94 V to 3.06 V working voltage range at IZ = 5 mA, exhibiting −3.5 mV/K to −1.6 mV/K temperature coefficient depending on bias current. Its low 325 Ω differential resistance ensures minimal output voltage drift under load variation.
The device uses planar epitaxial construction for stable avalanche characteristics and integrates a cathode-marked SOD523 package optimized for high-density reflow assembly. Thermal resistance from junction to solder point is 65 K/W, enabling reliable operation up to 300 mW total power dissipation on FR4 PCBs with 35 mm² copper area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 3.0 V at 5 mA - defines precise regulation point for low-voltage reference circuits |
| Voltage Tolerance | ±2 % - enables tighter output voltage control than ±5 % variants in feedback loops |
| Differential Resistance | 325 Ω typ. at 5 mA - limits regulation error to <16.5 mV per 50 µA load change |
| Max Reverse Current | 10 µA at 2.4 V - ensures low leakage in standby power domains |
| Non-repetitive Peak Power | 40 W for 100 µs - provides transient overvoltage suppression without thermal runaway |
| Total Power Dissipation | 300 mW at 25 °C ambient - sets continuous operating limit on standard FR4 PCB |
| Junction Temperature Range | −65 °C to +150 °C - supports operation in automotive under-hood and industrial motor-control 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 during placement |
| 2 | Anode (A) | Connected to ground or lower-potential rail; reverse-biased configuration enables Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-compact SOD523 footprint | Enables placement in <1.1 mm² board area - ideal for wearables and IoT sensor nodes |
| Low differential resistance | 325 Ω typ. minimizes output impedance shift across 1–10 mA bias range |
| Controlled temperature coefficient | −3.5 to −1.6 mV/K allows predictable drift compensation in temperature-critical references |
| High surge robustness | 40 W non-repetitive pulse rating protects against ESD and inductive kickback transients |
| Low leakage performance | 10 µA max IR at VR = 2.4 V reduces quiescent current in battery-powered regulators |
Applications
| USB Port Overvoltage Protection | Low-Power Microcontroller Reference |
|---|---|
Use Scenario: Clamps 5 V USB supply rail during hot-plug transients or regulator overshoot. IC Role / Device Role / Timing Role: Zener diode acts as shunt clamp between VBUS and GND, conducting only above 3.0 V threshold. Use Value: Limits peak voltage to 3.3 V-compatible levels using 40 W surge capability, preventing damage to downstream USB PHY ICs. |
Use Scenario: Provides stable 3.0 V reference for ADC voltage scaling in battery-operated sensors. IC Role / Device Role / Timing Role: Functions as precision voltage reference in ratiometric measurement circuits with microcontroller internal ADC. Use Value: ±2 % tolerance and 325 Ω rdiff ensure <±6 mV absolute error across 1–5 mA bias, improving 12-bit ADC accuracy. |
| Industrial Sensor Signal Conditioning | White LED Bias Control |
Use Scenario: Stabilizes excitation voltage for resistive bridge sensors in 4–20 mA loop transmitters. IC Role / Device Role / Timing Role: Supplies regulated 3.0 V bias to Wheatstone bridge, rejecting supply ripple via low dynamic impedance. Use Value: 325 Ω differential resistance attenuates 100 Hz supply noise by >40 dB, reducing bridge output offset drift. |
Use Scenario: Sets constant forward current for single white LED in portable lighting modules. IC Role / Device Role / Timing Role: Used in series with LED and current-limiting resistor to fix cathode voltage at 3.0 V, stabilizing LED brightness. Use Value: Low 10 µA leakage at 2.4 V prevents unintended LED glow during sleep mode, extending battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX585-C3V0,135 | ±5 % tolerance (vs. ±2 %), identical 3.0 V nominal, same SOD523 package | Acceptable where cost sensitivity outweighs tight regulation needs | Select when budget constraints dominate and ±5 % output variation is acceptable in feedback paths |
| MMSZ4675T1G | 3.0 V ±5 %, SOD-123 package (2.7 × 1.6 mm vs. SOD523's 1.25 × 0.85 mm), 300 mW rating | Larger footprint but higher thermal mass; less suitable for ultra-dense layouts | Choose when board-level thermal management requires lower junction-to-ambient resistance (250 K/W vs. 350 K/W) |
Compared with BZX585-C3V0,135, the BZX585-B3V0,135 delivers tighter regulation for precision analog circuits; versus MMSZ4675T1G, it saves >70 % board area while maintaining equivalent surge handling - making it optimal for miniaturized power management where layout density and voltage accuracy are both critical.
Availability
BZX585-B3V0,135 is available at Aetrix Electronics and suitable for USB power protection, microcontroller reference design, industrial sensor conditioning, and LED biasing requiring stable component supply across high-mix, low-volume production runs.
Supply support for BZX585-B3V0,135 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, energy-efficient logic, discrete, and MOSFET devices with focus on reliability and manufacturability for high-volume electronics.
The BZX585 series belongs to Nexperia's general-purpose Zener diode product line, engineered specifically for compact, low-power voltage regulation and transient suppression in consumer, computing, and industrial applications.
FAQ
What is the maximum continuous reverse current the BZX585-B3V0,135 can sustain?
The device is rated for 200 mA maximum forward current, but in Zener operation, continuous reverse current is limited by power dissipation. At 25 °C ambient on FR4 with 35 mm² copper, 300 mW total power allows ~100 mA at 3.0 V before exceeding thermal limits - actual safe operating current depends on PCB layout and ambient conditions.
Does the BZX585-B3V0,135 have automotive qualification?
No. The BZX585-B3V0,135 is not AEC-Q200 qualified and is intended for commercial and industrial applications only. It has not undergone automotive-grade stress testing, and Nexperia explicitly states non-automotive qualification in its legal disclaimers.
How does the cathode marking appear on the SOD523 package?
A visible dark bar is printed on the top surface of the SOD523 package, aligned with Pin 1 (cathode). This marking is consistent across all BZX585-B/C variants and matches the simplified outline in Figure 11 of the datasheet.
Can the BZX585-B3V0,135 replace a 3.3 V Zener in an existing design?
No - its 3.0 V nominal Zener voltage differs from 3.3 V parts by 90 mV, which may cause regulation failure in circuits relying on exact 3.3 V thresholds. Substitution requires verification of voltage margin in the target application, especially in feedback loops or clamping circuits.
BZX585-B3V0,135 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):
- 3 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 1 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-B3V0,135 FAQ
1.How can I place an order for BZX585-B3V0,135 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX585-B3V0,135 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-B3V0,135 reliable?
The price and inventory of BZX585-B3V0,135 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX585-B3V0,135 is usually 5 days.
3.What payment methods are accepted for BZX585-B3V0,135?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX585-B3V0,135 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX585-B3V0,135?
BZX585-B3V0,135 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX585-B3V0,135 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-B3V0,135?
For technical support, including BZX585-B3V0,135 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX585-B3V0,135 requirements.
6.How does Aetrix verify that BZX585-B3V0,135 is sourced from the original manufacturer or authorized distributors?
All BZX585-B3V0,135 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-B3V0,135 meets industry standards.
7.What is the process for return or replacement of BZX585-B3V0,135?
All BZX585-B3V0,135 units undergo pre-shipment inspection (PSI). If there is an issue with BZX585-B3V0,135, 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-B3V0,135 part is unused and in its original packaging.
Return procedure for BZX585-B3V0,135:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX585-B3V0,135 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
