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Nexperia USA Inc. BZX84W-B7V5-QX
- Part No.:
- BZX84W-B7V5-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-B7V5-QX.pdf
- Description:
- DIODE ZENER 7.5V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:3,896
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Product details
Overview
BZX84W-B7V5-QX from Nexperia is a ±2 % tolerance Zener diode in SOT323 (SC-70) package, rated for 7.5 V nominal regulation voltage at 5 mA, with 80 Ω differential resistance and 4.0 mV/K temperature coefficient. It delivers 275 mW total power dissipation on FR4 PCB and supports automotive-grade voltage reference and overvoltage clamping in space-constrained DC-DC feedback paths.
For engineers reviewing the BZX84W-B7V5-QX datasheet, BZX84W-B7V5-QX pinout, BZX84W-B7V5-QX application, or BZX84W-B7V5-QX equivalent, this part is selected for precision low-current biasing, ESD-tolerant voltage clamping, and AEC-Q101-compliant reference generation where thermal stability and tight voltage tolerance are critical.
Technical Context
This Zener diode operates in reverse breakdown mode with a nominal 7.5 V regulation voltage at IZ = 5 mA, exhibiting 80 Ω differential resistance and a positive 4.0 mV/K temperature coefficient-enabling predictable drift compensation in temperature-varying environments. Its 1 µA reverse current at VR = 5 V ensures low leakage in standby circuits.
The device is qualified to AEC-Q101, with junction temperature rated to 150 °C and ambient operating range from −55 °C to +150 °C. Thermal resistance from junction-to-ambient is 455 K/W on standard FR4, defining its derating envelope under continuous DC load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 7.5 V at IZ = 5 mA - defines stable regulation point for feedback networks and reference rails |
| Tolerance | ±2 % (B-series) - enables tighter output voltage control vs. ±5 % C-series variants |
| Differential Resistance | 80 Ω at IZ = 5 mA - determines regulation stiffness and line/load regulation sensitivity |
| Temperature Coefficient | +4.0 mV/K - quantifies voltage drift per degree rise; supports thermal compensation design |
| Reverse Current | 1 µA at VR = 5 V - confirms low leakage for battery-backed or ultra-low-power monitoring |
| Total Power Dissipation | 275 mW on FR4 PCB - sets maximum continuous DC power handling under standard mounting |
| Forward Voltage | 0.9 V at IF = 10 mA - defines conduction threshold when used in forward-biased protection paths |
Pinout & Package
Package: SOT323 (SC-70), leadless surface-mount plastic package with 3 terminals, footprint dimensions per Figure 9 (reflow) and Figure 10 (wave soldering); compatible with automated pick-and-place and reflow processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-bias terminal; connects to lower-potential node in Zener operation (reverse-biased) |
| 2 | Not Connected (n.c.) | Internally unconnected; must remain floating-no routing or grounding permitted |
| 3 | Cathode (K) | Reverse-bias terminal; connects to higher-potential node; carries regulated Zener current |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics |
| ±2 % voltage tolerance | Reduces need for post-production trimming in precision voltage reference designs |
| Low 1 µA reverse leakage at 5 V | Minimizes quiescent current draw in always-on sensor biasing and wake-up circuits |
| 80 Ω differential resistance | Enables stable regulation under ±1 mA load variation without significant voltage shift |
| SOT323 package footprint | Occupies only 2.65 mm × 1.3 mm area-ideal for dense power management IC layouts |
Applications
| Automotive Sensor Biasing | DC-DC Feedback Reference |
|---|---|
|
Use Scenario: Providing stable bias voltage to analog pressure/temperature sensors in engine bay modules. IC Role / Device Role / Timing Role: Zener voltage reference establishing fixed reference potential for sensor signal conditioning circuitry. Use Value: ±2 % tolerance and +4.0 mV/K TC ensure <±15 mV drift across −40 °C to +125 °C, meeting ASIL-B sensor accuracy requirements. |
Use Scenario: Setting output voltage in isolated flyback or buck converter feedback loops. IC Role / Device Role / Timing Role: Precision shunt regulator in optocoupler-coupled feedback path. Use Value: 80 Ω dynamic impedance maintains <0.5 % output voltage error under 10–20 mA loop current variation. |
| ESD-Suppressed Signal Clamping | Low-Power Microcontroller Reset Circuit |
|
Use Scenario: Protecting UART/I²C lines from transient overvoltage in infotainment head units. IC Role / Device Role / Timing Role: Bidirectional clamping element (anode-to-ground, cathode-to-rail) limiting excursion to ±0.9 V / +7.5 V. Use Value: 275 mW power rating sustains 40 W non-repetitive surges (tp = 100 µs), exceeding IEC 61000-4-2 Level 4. |
Use Scenario: Generating clean reset threshold for 3.3 V microcontrollers during brown-out conditions. IC Role / Device Role / Timing Role: Zener-based voltage detector feeding comparator input in supervisor IC or discrete reset circuit. Use Value: 1 µA leakage at 5 V ensures <100 nA loading on weak pull-up networks, preserving timing integrity in deep-sleep modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84W-C7V5-Q | ±5 % tolerance (vs. ±2 %), same 7.5 V nominal, 150 Ω rdif at 5 mA | Acceptable where cost sensitivity outweighs regulation precision; higher impedance increases output ripple | Select for non-critical biasing where 7.5 V ±0.375 V suffices and BOM cost reduction is prioritized |
| MMSZ5236B-7-F | ±5 % tolerance, 7.5 V nominal, 100 Ω rdif, SOD-123 package (larger footprint, higher thermal mass) | Higher Ptot (500 mW) but lacks AEC-Q101 qualification; unsuitable for automotive deployment | Choose only for industrial/non-automotive use requiring higher power margin and no automotive qualification |
Compared with BZX84W-C7V5-Q, the BZX84W-B7V5-QX offers tighter regulation and lower impedance for improved stability; versus MMSZ5236B-7-F, it trades power headroom for automotive compliance and miniaturization-making it optimal for AEC-Q101-mandated, space-constrained designs.
Availability
BZX84W-B7V5-QX is available at Aetrix Electronics and suitable for automotive sensor biasing, DC-DC feedback referencing, and ESD-clamped signal line protection requiring stable component supply across production lifecycles.
Supply support for BZX84W-B7V5-QX 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 automotive-qualified components and advanced packaging.
The BZX84W-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for robust voltage regulation and clamping in harsh automotive and industrial environments.
FAQ
What is the maximum continuous reverse current the BZX84W-B7V5-QX can sustain at 25 °C?
The device is rated for 200 mA maximum forward current, but as a Zener diode, its continuous reverse (Zener) current is limited by power dissipation. At 25 °C ambient and 275 mW Ptot, the maximum sustainable Zener current is 36.7 mA (275 mW ÷ 7.5 V). Derating applies above 25 °C per the 455 K/W Rth(j-a).
Is pin 2 truly unconnected, or does it serve a mechanical or thermal function?
Pin 2 is electrically unconnected (n.c.) per Table 2 and the simplified outline graphic. It has no internal bond wire or semiconductor connection. While it may provide minor mechanical anchoring or contribute marginally to thermal conduction via the leadframe, it must not be routed or grounded-doing so risks shorting or violating the specified SOT323 footprint.
How does the +4.0 mV/K temperature coefficient impact long-term stability in a 125 °C under-hood environment?
From 25 °C to 125 °C (ΔT = 100 K), the Zener voltage shifts +400 mV (4.0 mV/K × 100 K), resulting in a 7.5 V → 7.9 V regulation point. This 5.3 % drift is fully characterized and repeatable; designers compensate by selecting complementary TC components or using the diode within narrower temperature bands where drift remains within system tolerance.
Can BZX84W-B7V5-QX replace BZX84-C7V5 in an existing design without layout changes?
Yes-both share identical SOT323 (SC-70) package, pinout (anode/cathode/n.c.), and footprint. However, the B-series offers ±2 % tolerance and lower rdif (80 Ω vs. 150 Ω), improving regulation accuracy and load response. No PCB change is needed, but verify that tighter tolerance doesn't over-constrain downstream circuit margins.
BZX84W-B7V5-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX84W-Q
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 7.5 V
- Tolerance:
- ±2%
- Power - Max:
- 275 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 5 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BZX84W-B7V5-QX FAQ
1.How can I place an order for BZX84W-B7V5-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-B7V5-QX 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 BZX84W-B7V5-QX reliable?
The price and inventory of BZX84W-B7V5-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-B7V5-QX is usually 5 days.
3.What payment methods are accepted for BZX84W-B7V5-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-B7V5-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-B7V5-QX?
BZX84W-B7V5-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-B7V5-QX 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 BZX84W-B7V5-QX?
For technical support, including BZX84W-B7V5-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-B7V5-QX requirements.
6.How does Aetrix verify that BZX84W-B7V5-QX is sourced from the original manufacturer or authorized distributors?
All BZX84W-B7V5-QX 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 BZX84W-B7V5-QX meets industry standards.
7.What is the process for return or replacement of BZX84W-B7V5-QX?
All BZX84W-B7V5-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-B7V5-QX, 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 BZX84W-B7V5-QX part is unused and in its original packaging.
Return procedure for BZX84W-B7V5-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-B7V5-QX Tags
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BZT52C5V6T-7
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MMSZ5231B-7-F
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BZX84C3V3LT1G
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MM5Z5V1ST1G
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