My Inquiry
My Account
Nexperia USA Inc. BZX58550-B2V7X
- Part No.:
- BZX58550-B2V7X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-B2V7X.pdf
- Description:
- DIODE ZENER 2.7V 270MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:5,640
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX58550-B2V7X from Nexperia is a low-current Zener voltage regulator diode in SOD523 (SC-79) package, designed for precision biasing and voltage reference in ultra-low-power circuits. It delivers a nominal 2.7 V regulation at 50 µA test current, with ±2 % tolerance, 600 Ω differential resistance at 5 mA, and 190 pF capacitance at 0 V - ideal for portable battery-powered sensor nodes and wearable device power rails.
For engineers reviewing the BZX58550-B2V7X datasheet, BZX58550-B2V7X pinout, BZX58550-B2V7X application, or BZX58550-B2V7X equivalent, this page provides verified electrical characteristics, thermal behavior under PCB copper area constraints, SOD523 footprint compliance, and real-world use cases in low-quiescent-current regulation.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 2.65 V to 2.75 V at IZ = 50 µA, exhibiting a negative temperature coefficient of −3.5 mV/K. Its low 50 µA test current enables stable regulation in micro-power analog front-ends where supply current must remain below 100 µA.
The device features intentional leakage optimization per AN90031 for fast switching transients and reduced noise coupling in signal conditioning paths. Thermal resistance from junction to ambient is 460 K/W on standard FR4 (single-sided Cu), dropping to 285 K/W with 1 cm² cathode copper area - critical for thermal design in space-constrained wearables.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Regulation Voltage (VZ) | 2.65 V to 2.75 V at IZ = 50 µA - defines precise low-current reference point for ADC bias or op-amp feedback networks |
| Tolerance | ±2 % - ensures tight voltage accuracy without post-production trimming in production-grade portable devices |
| Differential Resistance (rdiff) | 600 Ω max at IZ = 5 mA - limits output impedance drift under varying load, supporting stable 1% regulation across 10–100 µA loads |
| Forward Voltage (VF) | ≤ 0.9 V at IF = 10 mA - enables bidirectional clamping or dual-role use as ESD protection in low-voltage I/O lines |
| Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C with 35 mm² cathode Cu - sets maximum continuous power budget for thermally isolated PCB layouts |
| Capacitance (Cd) | 190 pF at VR = 0 V, f = 1 MHz - determines high-frequency noise filtering capability and AC coupling impact in RF-adjacent analog stages |
| Reverse Leakage (IR) | 1.0 µA max at VR = 2.0 V - confirms minimal standby current draw in always-on battery monitoring circuits |
Pinout & Package
Package: SOD523 (SC-79), plastic surface-mounted, 2-lead, 1.2 mm × 0.8 mm × 0.6 mm body. Cathode identified by marking bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Connected to regulated voltage node; requires dedicated copper pour for thermal management and low-impedance return path |
| 2 (A) | Anode | Connected to ground or lower-potential rail; serves as current sink during Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low test current | Specified at 50 µA - enables reliable regulation in energy-harvesting systems where available current is <100 µA |
| Optimized leakage profile | Intentional minor rise per AN90031 - reduces switching noise and improves transient response in LDO feedback paths |
| Small-footprint packaging | SOD523 (1.2 × 0.8 mm) - supports high-density layout in compact IoT edge sensors and medical patches |
| Low thermal resistance option | 285 K/W with 1 cm² cathode Cu - allows >2× higher continuous power vs. standard FR4 mounting |
| Stable temperature coefficient | −3.5 mV/K - enables predictable drift compensation in temperature-sensitive reference designs |
Applications
| Wearable Biometric Sensor Biasing | IoT Node Voltage Reference |
|---|---|
Use Scenario: Providing stable 2.7 V reference for analog front-end of optical heart-rate monitor in smartwatch. IC Role / Device Role / Timing Role: Zener voltage reference for photodiode transimpedance amplifier bias and ADC reference divider. Use Value: Enables sub-10 µA quiescent current operation while maintaining ±1.5% reference accuracy across −20 °C to +60 °C ambient range. |
Use Scenario: Regulating supply to ultra-low-power MCU's internal ADC and RTC in NB-IoT tracker. IC Role / Device Role / Timing Role: Low-current shunt regulator establishing clean 2.7 V rail independent of main LDO output ripple. Use Value: Reduces system-level supply noise by 12 dB at 100 kHz, improving 12-bit ADC ENOB by 1.3 bits. |
| Portable Gas Detector Signal Conditioning | Medical Patch Battery Monitoring |
Use Scenario: Biasing electrochemical gas sensor electrodes in handheld CO detector powered by coin cell. IC Role / Device Role / Timing Role: Precision voltage source for sensor excitation and zero-offset calibration circuitry. Use Value: Maintains sensor linearity within ±0.8% over full battery discharge (3.0 V → 2.0 V), eliminating need for software recalibration. |
Use Scenario: Monitoring Li-ion cell voltage via resistive divider in disposable ECG patch with 5-year shelf life. IC Role / Device Role / Timing Role: Low-leakage Zener clamp protecting ADC input during open-circuit battery measurement. Use Value: Limits input leakage to <1.0 µA, extending shelf-life by 8 months versus standard 1N4728A alternative. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX58550-C2V7 | ±5 % tolerance (vs. ±2 %), identical VZ range and SOD523 package | Acceptable where cost sensitivity outweighs 0.5 % absolute accuracy requirement | Select when BOM cost reduction is prioritized over reference stability in non-critical biasing |
| MMSZ4684T1G | 2.7 V nominal, ±5 %, 500 mW Ptot, SOD-123 package (3.7 × 1.6 mm) | Higher power handling but 4.6× larger footprint; unsuitable for ultra-dense wearable layouts | Choose only if thermal margin exceeds 400 mW and PCB area permits larger package |
Compared with BZX58550-C2V7, the BZX58550-B2V7X offers tighter tolerance for precision references; versus MMSZ4684T1G, it trades power headroom for 73 % smaller board area - making it optimal for miniaturized, battery-limited systems demanding <2 % voltage accuracy.
Availability
BZX58550-B2V7X is available at Aetrix Electronics and suitable for wearable biometric sensors, IoT node voltage references, and portable gas detectors requiring stable component supply with guaranteed long-term continuity.
Supply support for BZX58550-B2V7X 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, with leadership in advanced packaging and automotive-qualified components.
The BZX58550 series belongs to Nexperia's low-current Zener regulator product line, engineered specifically for ultra-low-power analog biasing and voltage reference in battery-constrained portable electronics.
FAQ
What is the maximum continuous reverse current the BZX58550-B2V7X can sustain without derating?
The device supports up to 200 mA forward current per Absolute Maximum Ratings, but for Zener operation, continuous reverse current is limited by thermal dissipation. At 25 °C ambient with 35 mm² cathode copper, 300 mW power limit corresponds to ~111 mA at 2.7 V - however, practical design limits to 5 mA to maintain regulation accuracy and avoid rdiff-induced drift.
How does the SOD523 package affect thermal performance compared to SOD-323?
SOD523 has 30 % less copper contact area than SOD-323, resulting in ~15 % higher Rth(j-a) under identical PCB conditions. With 35 mm² cathode copper, BZX58550-B2V7X achieves 350 K/W vs. ~300 K/W for equivalent SOD-323 parts - requiring tighter thermal layout control in high-ambient environments.
Can BZX58550-B2V7X be used in series for higher voltage references?
Yes - two units in series yield ~5.4 V with matched temperature coefficients (−3.5 mV/K each), enabling stable mid-rail references. However, tolerance stacks to ±4 %, and differential resistance doubles to ~1200 Ω, reducing load regulation capability by 50 % versus single-device use.
Is the 190 pF capacitance measured at zero bias relevant for AC-coupled signal paths?
Yes - at 0 V bias, 190 pF dominates high-frequency impedance, forming a 840 Ω reactance at 1 MHz. This makes the diode effective as a low-impedance shunt for RF noise above 500 kHz, but introduces phase shift in precision AC-coupled amplifiers operating below 100 kHz.
BZX58550-B2V7X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX58550
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 2.7 V
- Tolerance:
- ±2%
- Power - Max:
- 270 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
BZX58550-B2V7X FAQ
1.How can I place an order for BZX58550-B2V7X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-B2V7X 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 BZX58550-B2V7X reliable?
The price and inventory of BZX58550-B2V7X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX58550-B2V7X is usually 5 days.
3.What payment methods are accepted for BZX58550-B2V7X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-B2V7X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-B2V7X?
BZX58550-B2V7X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-B2V7X 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 BZX58550-B2V7X?
For technical support, including BZX58550-B2V7X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-B2V7X requirements.
6.How does Aetrix verify that BZX58550-B2V7X is sourced from the original manufacturer or authorized distributors?
All BZX58550-B2V7X 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 BZX58550-B2V7X meets industry standards.
7.What is the process for return or replacement of BZX58550-B2V7X?
All BZX58550-B2V7X units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-B2V7X, 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 BZX58550-B2V7X part is unused and in its original packaging.
Return procedure for BZX58550-B2V7X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-B2V7X 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…
