My Inquiry
My Account
Nexperia USA Inc. BZX585-B4V7,135
.jpg)
- Part No.:
- BZX585-B4V7,135
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX585-B4V7,135.pdf
- Description:
- DIODE ZENER 4.7V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:7,600
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX585-B4V7,135 from Nexperia is a ±2 % tolerance Zener diode in SOD523 (SC-79) package, rated for 4.7 V nominal regulation at 5 mA, with 300 mW total power dissipation and 425 Ω typical differential resistance at IZ = 5 mA - used for precision voltage reference and low-power rail stabilization in space-constrained consumer and industrial PCBs.
For engineers reviewing the BZX585-B4V7,135 datasheet, BZX585-B4V7,135 pinout, BZX585-B4V7,135 application, or BZX585-B4V7,135 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (Rth(j-sp) = 65 K/W), non-repetitive surge capability (40 W, 100 µs), and SC-79 footprint compatibility with high-density reflow assembly.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load and temperature conditions. Its ±2 % tolerance and low 425 Ω differential resistance at 5 mA ensure tight regulation in feedback paths and reference nodes.
Designed for surface-mount use on FR4 PCBs with ≥35 mm² copper at the cathode tab, it delivers Rth(j-a) = 350 K/W (free air) and Rth(j-sp) = 65 K/W (solder point), enabling reliable operation up to 150 °C junction temperature with controlled thermal rise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.61 V to 4.79 V at IZ = 5 mA - defines precise regulation point for low-voltage reference circuits |
| Tolerance | ±2 % - ensures predictable voltage accuracy without post-production trimming |
| Differential Resistance (rdiff) | 425 Ω typ. at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Total Power Dissipation (Ptot) | 300 mW at Tamb = 25 °C - sets maximum continuous DC power handling on standard FR4 layout |
| Non-repetitive Peak Power (PZSM) | 40 W for 100 µs square wave - supports transient overvoltage clamping in ESD-protected interfaces |
| Reverse Current (IR) | ≤3.0 µA at VR = 3.0 V - guarantees minimal leakage in battery-backed or ultra-low-power standby modes |
| Thermal Resistance (Rth(j-sp)) | 65 K/W - enables direct thermal coupling to PCB copper for efficient heat transfer from cathode tab |
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; optimized for automated placement and reflow soldering per IPC-7351B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal; carries reverse current during Zener conduction |
| 2 | Anode (A) | Connected to circuit ground or lower-potential rail; completes reverse-biased path for voltage reference operation |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMD package | SOD523 footprint (1.25 × 0.85 mm) enables routing under QFNs and in 0.4 mm pitch BGA escape zones |
| High surge robustness | Withstands 40 W non-repetitive reverse pulses (100 µs), supporting IEC 61000-4-2 Level 4 ESD protection circuits |
| Precision voltage regulation | ±2 % VZ tolerance and 425 Ω rdiff enable stable 4.7 V references in ADC biasing and op-amp feedback networks |
| Low thermal resistance | Rth(j-sp) = 65 K/W allows >100 mW sustained dissipation with <7 °C rise above solder point on 35 mm² Cu |
Applications
| USB-C Port Protection | IoT Sensor Reference |
|---|---|
Use Scenario: Clamping transient voltages on CC and VCONN lines during hot-plug events. IC Role / Device Role / Timing Role: Zener clamp placed between signal line and ground to limit voltage excursions below IC absolute maximum ratings. Use Value: 40 W surge rating absorbs IEC 61000-4-2 contact discharge energy without degradation; ±2 % VZ ensures consistent clamping threshold across production lots. |
Use Scenario: Providing stable 4.7 V reference for analog front-end of environmental sensor nodes. IC Role / Device Role / Timing Role: Passive voltage reference for ADC reference input or op-amp bias network in ultra-low-power sleep/wake cycles. Use Value: ≤3.0 µA reverse leakage at 3.0 V preserves battery life in multi-year deployments; SOD523 size minimizes board area in compact sensor modules. |
| Industrial PLC Input Conditioning | White Goods Control Board Regulation |
Use Scenario: Stabilizing 5 V logic supply rails feeding optocoupler inputs in noisy factory environments. IC Role / Device Role / Timing Role: Shunt regulator maintaining clean 4.7 V reference for level-shifting and noise filtering circuits. Use Value: 425 Ω differential resistance limits output voltage shift to <2 mV per 1 mA load variation, improving analog input accuracy. |
Use Scenario: Regulating auxiliary 4.7 V rail powering microcontroller reset supervisors and EEPROM interfaces. IC Role / Device Role / Timing Role: Low-power Zener shunt providing fail-safe voltage monitoring and brown-out detection thresholds. Use Value: Rth(j-sp) = 65 K/W permits continuous operation at 85 °C ambient with no derating on standard 2-layer control boards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX585-C4V7,135 | ±5 % tolerance, higher 500 Ω rdiff at 5 mA, identical SOD523 package and PZSM | Acceptable where cost sensitivity outweighs voltage accuracy; less suitable for precision feedback loops | Select when budget constraints dominate and ±5 % regulation drift is acceptable in final system calibration |
| MMSZ4685T1G | ±5 % tolerance, 500 mW Ptot, SOD-123 package (2.7 × 1.6 mm), 220 Ω rdiff at 5 mA | Larger footprint but higher power margin; better for higher-current reference sinks | Choose when board space allows larger package and >300 mW continuous dissipation is required |
Compared with BZX585-C4V7,135, the BZX585-B4V7,135 offers tighter voltage control critical for analog sensing; versus MMSZ4685T1G, it trades 2× board area reduction for 30 % lower surge power and 1.9× higher dynamic impedance - favoring miniaturized, low-leakage designs over raw power handling.
Availability
BZX585-B4V7,135 is available at Aetrix Electronics and suitable for USB-C interface protection, IoT sensor reference design, and industrial PLC input conditioning requiring stable component supply and full traceability.
Supply support for BZX585-B4V7,135 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 essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and consumer markets.
The BZX585 series belongs to Nexperia's general-purpose Zener diode product line, engineered specifically for compact, high-reliability voltage regulation in space-constrained SMT applications with demanding thermal and surge requirements.
FAQ
What is the maximum continuous forward current for BZX585-B4V7,135?
The device is not intended for forward conduction; its absolute maximum forward current is 200 mA per limiting values table, but forward operation exceeds design intent. It must be operated in reverse-biased Zener mode, where forward voltage is specified only for characterization (1.1 V at 100 mA pulse).
Can BZX585-B4V7,135 replace a 5.1 V Zener in an existing design?
No - its nominal Zener voltage is 4.7 V (4.61–4.79 V range), not 5.1 V. Substituting it for a 5.1 V part would cause under-regulation, potentially violating downstream IC supply tolerances. Use BZX585-B5V1,135 for 5.1 V applications.
How does the SOD523 package affect thermal performance compared to SOD-323?
SOD523 has lower Rth(j-sp) (65 K/W) than typical SOD-323 Zeners (~100–120 K/W) due to optimized cathode tab geometry and shorter internal thermal path, enabling ~30 % higher sustained power dissipation on identical PCB copper areas.
Is BZX585-B4V7,135 suitable for automotive applications?
No - this part is not AEC-Q200 qualified. Nexperia explicitly states in legal disclaimers that non-automotive qualified products like BZX585-B4V7,135 are unsuitable for safety-critical or automotive use; automotive designs require verified AEC-Q200-compliant alternatives.
BZX585-B4V7,135 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):
- 4.7 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 2 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-B4V7,135 FAQ
1.How can I place an order for BZX585-B4V7,135 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX585-B4V7,135 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-B4V7,135 reliable?
The price and inventory of BZX585-B4V7,135 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX585-B4V7,135 is usually 5 days.
3.What payment methods are accepted for BZX585-B4V7,135?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX585-B4V7,135 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX585-B4V7,135?
BZX585-B4V7,135 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX585-B4V7,135 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-B4V7,135?
For technical support, including BZX585-B4V7,135 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX585-B4V7,135 requirements.
6.How does Aetrix verify that BZX585-B4V7,135 is sourced from the original manufacturer or authorized distributors?
All BZX585-B4V7,135 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-B4V7,135 meets industry standards.
7.What is the process for return or replacement of BZX585-B4V7,135?
All BZX585-B4V7,135 units undergo pre-shipment inspection (PSI). If there is an issue with BZX585-B4V7,135, 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-B4V7,135 part is unused and in its original packaging.
Return procedure for BZX585-B4V7,135:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX585-B4V7,135 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…
