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Nexperia USA Inc. BZX585-B3V6,135
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- Part No.:
- BZX585-B3V6,135
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX585-B3V6,135.pdf
- Description:
- DIODE ZENER 3.6V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:9,073
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Product details
Overview
BZX585-B3V6,135 from Nexperia is a 3.6 V ±2 % tolerance Zener diode in SOD523 (SC-79) package, rated for 300 mW total power dissipation and 40 W non-repetitive peak reverse power, used for precision voltage regulation in space-constrained low-power circuits such as sensor biasing and reference voltage generation.
For engineers reviewing the BZX585-B3V6,135 datasheet, BZX585-B3V6,135 pinout, BZX585-B3V6,135 application, or BZX585-B3V6,135 equivalent, key selection criteria include Zener voltage tolerance (±2 %), differential resistance (375 Ω at IZ = 5 mA), thermal resistance (65 K/W junction-to-solder point), and ultra-small SOD523 footprint compatibility with high-density PCB layouts.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable 3.6 V output across load and supply variations, with a temperature coefficient of −1.9 mV/K at IZ = 5 mA - enabling predictable drift compensation in ambient-temperature-sensitive references. Its low 375 Ω differential resistance ensures minimal voltage shift under 1–5 mA regulation current.
The device supports transient suppression via 40 W non-repetitive peak reverse power handling (tp = 100 µs, square wave), while its 300 mW steady-state dissipation and 65 K/W Rth(j-sp) allow reliable operation on FR4 PCBs with minimal copper area (35 mm² at cathode tab).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.53 V to 3.67 V at IZ = 5 mA - defines nominal regulation point with ±2 % tolerance for tight reference stability |
| Differential Resistance (rdiff) | 375 Ω (typ) at IZ = 5 mA - determines output impedance and load regulation error under varying current |
| Temperature Coefficient (SZ) | −1.9 mV/K at IZ = 5 mA - quantifies voltage drift per degree Celsius for thermal design margining |
| Total Power Dissipation (Ptot) | 300 mW at Tamb = 25 °C on FR4 PCB - sets maximum continuous DC power limit for thermal layout planning |
| Non-repetitive Peak Power (PZSM) | 40 W for tp = 100 µs - enables short-duration surge clamping without permanent damage |
| Forward Voltage (VF) | 1.1 V at IF = 100 mA - specifies forward conduction loss when used in series protection or dual-direction configurations |
| Junction-to-Solder-Point Rth | 65 K/W - critical for calculating junction temperature rise above solder point in compact thermal designs |
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 for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; reverse-biased during Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-compact SOD523 footprint | Enables placement in <1.5 mm² board area - ideal for wearables, IoT sensors, and miniaturized power rails |
| ±2 % Zener voltage tolerance | Reduces need for post-production trimming in precision 3.6 V reference designs (e.g., ADC bias, LDO feedback) |
| Low 375 Ω differential resistance | Limits output voltage deviation to <1.9 mV per 5 µA load change - improves regulation accuracy in low-current apps |
| 65 K/W junction-to-solder-point thermal resistance | Allows direct thermal coupling to PCB copper pour without thermal vias - simplifies thermal management |
| 40 W non-repetitive peak power rating | Withstands ESD transients (IEC 61000-4-2 Level 4) when placed at I/O interface points |
Applications
| Industrial Sensor Signal Conditioning | Portable Device Voltage Reference |
|---|---|
|
Use Scenario: Providing stable 3.6 V bias for analog front-end op-amps in temperature/humidity sensors. IC Role / Device Role / Timing Role: Zener voltage reference establishing precise input common-mode level for signal chain amplification. Use Value: ±2 % VZ tolerance and −1.9 mV/K TC ensure <±15 mV total drift over −40 °C to +85 °C, meeting industrial-grade accuracy. |
Use Scenario: Generating fixed reference for battery fuel gauging ICs in Bluetooth earbuds and smartwatches. IC Role / Device Role / Timing Role: Low-power shunt regulator supplying clean 3.6 V to ADC reference inputs during intermittent measurement cycles. Use Value: 300 mW Ptot and SOD523 size enable integration into sub-3 mm² modules without thermal derating or footprint penalty. |
| USB-C Port Overvoltage Clamp | Microcontroller Reset Circuit |
|
Use Scenario: Clamping VBUS line surges during hot-plug events in USB-C peripheral designs. IC Role / Device Role / Timing Role: Transient voltage suppressor absorbing 100 µs spikes up to 40 W before system-level protection triggers. Use Value: 40 W PZSM rating and fast 100 µs response match USB-IF surge test profiles, eliminating need for larger TVS diodes. |
Use Scenario: Setting threshold for RC-based manual reset circuit in Cortex-M0+ microcontrollers. IC Role / Device Role / Timing Role: Precision Zener defining exact 3.6 V trip point for reset assertion during brown-out conditions. Use Value: 375 Ω rdiff ensures consistent threshold despite supply ripple, reducing false resets in noisy embedded environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5226BS-7-F | 3.6 V ±5 %, SOT-323 package (2.1 × 1.25 mm), 200 mW Ptot, 300 Ω rdiff | Larger footprint and looser tolerance reduce suitability for high-accuracy, space-critical designs | Select when cost sensitivity outweighs size and tolerance requirements |
| BZX384-B3V6,115 | 3.6 V ±2 %, SOD-323 package (1.7 × 1.25 mm), 300 mW Ptot, 400 Ω rdiff | 15 % higher rdiff increases load regulation error; 0.45 mm taller profile limits ultra-thin assemblies | Choose only if SOD-323 reflow profile compatibility is mandatory and 375 Ω rdiff is not required |
Compared with MMBZ5226BS-7-F and BZX384-B3V6,115, BZX585-B3V6,135 delivers superior regulation accuracy (±2 % + 375 Ω rdiff) in the smallest available footprint (SOD523), making it optimal for next-generation miniaturized power management where thermal and spatial constraints dominate.
Availability
BZX585-B3V6,135 is available at Aetrix Electronics and suitable for industrial sensor conditioning, portable device voltage reference, USB-C port overvoltage clamp, and microcontroller reset circuit applications requiring stable component supply with guaranteed long-term continuity.
Supply support for BZX585-B3V6,135 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 robust, scalable components.
The BZX585 series belongs to Nexperia's general-purpose Zener diode product line, engineered specifically for space-constrained, low-power voltage regulation and transient suppression in consumer and industrial electronics.
FAQ
What is the maximum continuous reverse current for BZX585-B3V6,135 at 25 °C?
The maximum continuous reverse current is derived from its 300 mW total power dissipation and 3.6 V Zener voltage, yielding approximately 83 mA (IZ = Ptot/VZ). This assumes no ambient temperature rise and adequate PCB copper area (35 mm² at cathode tab) per datasheet thermal condition.
Can BZX585-B3V6,135 be used in place of a 3.3 V Zener diode?
No - BZX585-B3V6,135 is specified for 3.53–3.67 V at 5 mA, not 3.3 V. Substituting it for a 3.3 V Zener would cause ~0.3 V over-regulation, potentially exceeding downstream IC absolute maximum ratings. Use BZX585-B3V3,135 for 3.3 V applications.
How does the −1.9 mV/K temperature coefficient affect circuit performance?
A −1.9 mV/K coefficient means the Zener voltage decreases by 1.9 mV per °C rise in junction temperature. Over a 125 °C range (−40 °C to +85 °C), this results in ~237 mV total drift - acceptable for non-precision references but requires compensation in metrology-grade designs.
Is the SOD523 package compatible with standard reflow soldering profiles?
Yes - Nexperia provides a validated reflow footprint (Fig. 12) and recommends JEDEC J-STD-020-compliant profiles. Peak temperature must not exceed 260 °C, and time above 217 °C should be limited to 60–150 seconds to avoid package delamination or marking degradation.
BZX585-B3V6,135 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):
- 3.6 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 5 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-B3V6,135 FAQ
1.How can I place an order for BZX585-B3V6,135 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX585-B3V6,135 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-B3V6,135 reliable?
The price and inventory of BZX585-B3V6,135 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX585-B3V6,135 is usually 5 days.
3.What payment methods are accepted for BZX585-B3V6,135?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX585-B3V6,135 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX585-B3V6,135?
BZX585-B3V6,135 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX585-B3V6,135 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-B3V6,135?
For technical support, including BZX585-B3V6,135 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX585-B3V6,135 requirements.
6.How does Aetrix verify that BZX585-B3V6,135 is sourced from the original manufacturer or authorized distributors?
All BZX585-B3V6,135 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-B3V6,135 meets industry standards.
7.What is the process for return or replacement of BZX585-B3V6,135?
All BZX585-B3V6,135 units undergo pre-shipment inspection (PSI). If there is an issue with BZX585-B3V6,135, 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-B3V6,135 part is unused and in its original packaging.
Return procedure for BZX585-B3V6,135:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX585-B3V6,135 Tags
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