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Nexperia USA Inc. BZX84W-C20-QF
- Part No.:
- BZX84W-C20-QF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-C20-QF.pdf
- Description:
- DIODE ZENER 20V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:6,929
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Product details
Overview
BZX84W-C20-QF from Nexperia is a ±5% tolerance Zener voltage regulator diode with 20 V nominal breakdown voltage, 225 Ω typical differential resistance at 5 mA, and 16.4 mV/K temperature coefficient, housed in a SOT323 (SC-70) package for space-constrained automotive power rail stabilization.
For engineers reviewing the BZX84W-C20-QF datasheet, BZX84W-C20-QF pinout, BZX84W-C20-QF application, or BZX84W-C20-QF equivalent, this part supports precision voltage reference, overvoltage clamping, and low-power biasing in AEC-Q101-compliant systems where thermal stability and small-footprint packaging are critical.
Technical Context
This Zener diode operates in reverse-bias breakdown mode to maintain stable voltage across its cathode-anode terminals under varying load and temperature conditions. Its 20 V nominal Zener voltage is specified at IZ = 5 mA with ±5% tolerance, and it exhibits a positive temperature coefficient of +16.4 mV/K above 10 V, enabling predictable drift compensation in reference circuits.
The device delivers 275 mW total power dissipation on FR4 PCB with single-sided copper, supports non-repetitive surge currents up to 1.2 A (at tp = 100 µs), and maintains <100 nA reverse leakage at 14 V, ensuring low quiescent current in always-on monitoring functions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20 V nominal at IZ = 5 mA; ±5% tolerance ensures predictable clamping within 18.8–21.2 V range |
| Differential Resistance (rdif) | 225 Ω max at IZ = 5 mA; defines output impedance and voltage regulation stiffness under load variation |
| Temperature Coefficient (SZ) | +16.4 mV/K at IZ = 5 mA; enables accurate thermal drift modeling for high-stability references |
| Reverse Leakage (IR) | 100 nA max at VR = 14 V; minimizes standby current in battery-backed or low-power sensing nodes |
| Total Power Dissipation (Ptot) | 275 mW at Tamb = 25 °C on standard FR4; sets maximum continuous DC power handling in compact layouts |
| Junction Temperature (Tj) | 150 °C max; supports operation in under-hood automotive environments without derating below 125 °C ambient |
| Package | SOT323 (SC-70); 2.2 mm × 1.35 mm footprint with 0.65 mm pitch enables high-density routing on space-limited PCBs |
Pinout & Package
SOT323 (SC-70) leadless surface-mount package with 3 terminals: anode (Pin 1), not connected (Pin 2), cathode (Pin 3). The n.c. terminal provides mechanical symmetry and thermal relief but carries no electrical function.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Forward current entry point; connects to lower-potential node in reverse-bias regulation configuration |
| 2 | Not Connected | Electrically isolated terminal; used for mechanical balance and thermal pad alignment-no PCB trace required |
| 3 | Cathode | Zener breakdown terminal; connects to regulated voltage rail and serves as reference output node |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including HTOL, TC, and ESD testing per JESD22 standards |
| ±5% Zener voltage tolerance | Enables cost-effective selection for non-critical regulation where tighter tolerance is unnecessary |
| Low capacitance (1.5 pF) | Minimizes signal distortion in high-frequency clamp or RF detector applications up to 100 MHz |
| 150 °C junction rating | Supports uninterrupted operation in engine control units, ADAS modules, and other high-temperature zones |
| 275 mW power rating on FR4 | Provides sufficient headroom for transient suppression in 12 V/24 V vehicle subsystems without heatsinking |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Stabilizing 5 V microcontroller supply rail against battery voltage transients during cold-crank or load-dump events. IC Role / Device Role / Timing Role: Zener shunt regulator providing passive overvoltage clamping and reference voltage anchoring. Use Value: Limits peak rail voltage to ≤21.2 V while drawing only 100 nA at 14 V, preserving low-power sleep mode integrity. |
Use Scenario: Biasing bridge amplifier inputs in strain-gauge or RTD measurement circuits requiring stable excitation. IC Role / Device Role / Timing Role: Precision voltage reference source with +16.4 mV/K drift compensation for ratiometric error correction. Use Value: Enables <±0.5% full-scale accuracy over −40 °C to +125 °C by matching sensor and reference thermal coefficients. |
| USB-C Power Delivery Protection | Smart Lighting Driver Feedback |
Use Scenario: Clamping CC line voltage during hot-plug insertion to prevent false PD contract negotiation. IC Role / Device Role / Timing Role: Fast-response transient suppressor protecting USB PD controller GPIO pins. Use Value: Responds within nanoseconds to 100 µs surges up to 40 W, limiting voltage to 21.2 V without latch-up. |
Use Scenario: Setting LED string current threshold in constant-current buck drivers via feedback divider reference. IC Role / Device Role / Timing Role: Stable voltage reference for optocoupler-based isolation feedback loop. Use Value: Maintains ±1.2% current regulation accuracy across 0–100% dimming range due to low rdif and thermal stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84W-B20-Q | ±2% tolerance (19.6–20.4 V), lower rdif (150 Ω), identical package and thermal specs | Required where tighter regulation is needed for analog reference or ADC biasing | Select when absolute voltage accuracy outweighs cost sensitivity |
| MMSZ5248B-TP | ±5% tolerance (19.0–21.0 V), 220 Ω rdif, SOD-123 package (3.7 mm × 1.6 mm) | Preferred where higher power (500 mW) or legacy footprint compatibility is mandatory | Choose for industrial designs needing larger thermal mass or existing SOD-123 layout reuse |
Compared with BZX84W-C20-QF, the BZX84W-B20-Q offers tighter voltage control at higher cost, while MMSZ5248B-TP trades miniaturization for greater power handling and legacy compatibility-making the C20-QF optimal for AEC-Q101-compliant, space-constrained automotive regulation.
Availability
BZX84W-C20-QF is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, USB-C protection circuits, and smart lighting driver feedback requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZX84W-C20-QF 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 BZX84W-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for robust voltage regulation and transient suppression in harsh automotive environments.
FAQ
What is the maximum continuous reverse current this diode can sustain at 25 °C?
The BZX84W-C20-QF has no defined maximum continuous reverse current rating; instead, its safe operating limit is governed by total power dissipation. At 25 °C ambient on FR4 PCB, it sustains up to 13.75 mA continuously (275 mW ÷ 20 V) before exceeding 275 mW Ptot. Derating is required above 25 °C per Rth(j-a) = 455 K/W.
Does Pin 2 serve any electrical function in circuit design?
No-Pin 2 is explicitly designated "not connected" in Nexperia's official pinning documentation. It is a mechanical dummy terminal with no internal bond wire or semiconductor connection. PCB layout may omit a copper trace to this pad, though solder mask clearance should be maintained per JEDEC SOT323 outline.
How does the +16.4 mV/K temperature coefficient impact regulation accuracy over temperature?
At 20 V nominal Zener voltage, +16.4 mV/K translates to +0.082%/°C drift. Over a −40 °C to +125 °C range (165 K ΔT), total drift is ≈2.7 V-so regulation shifts from ~18.7 V to ~21.4 V. This is fully characterized and repeatable, enabling software or hardware compensation in closed-loop systems.
Can this diode replace older BZX84C20 parts in existing designs?
Yes-BZX84W-C20-QF is a direct functional and pin-compatible upgrade to legacy BZX84C20 in SOT23 packages, but with improved AEC-Q101 qualification, tighter thermal resistance control, and SC-70 (SOT323) footprint. Layout adaptation is required due to smaller 2.2 mm × 1.35 mm body and 0.65 mm pitch versus SOT23's 2.9 mm × 1.3 mm and 0.95 mm pitch.
BZX84W-C20-QF 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):
- 20 V
- Tolerance:
- ±6%
- Power - Max:
- 275 mW
- Impedance (Max) (Zzt):
- 55 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 14 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-C20-QF FAQ
1.How can I place an order for BZX84W-C20-QF through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-C20-QF 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-C20-QF reliable?
The price and inventory of BZX84W-C20-QF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-C20-QF is usually 5 days.
3.What payment methods are accepted for BZX84W-C20-QF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-C20-QF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-C20-QF?
BZX84W-C20-QF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-C20-QF 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-C20-QF?
For technical support, including BZX84W-C20-QF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-C20-QF requirements.
6.How does Aetrix verify that BZX84W-C20-QF is sourced from the original manufacturer or authorized distributors?
All BZX84W-C20-QF 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-C20-QF meets industry standards.
7.What is the process for return or replacement of BZX84W-C20-QF?
All BZX84W-C20-QF units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-C20-QF, 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-C20-QF part is unused and in its original packaging.
Return procedure for BZX84W-C20-QF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-C20-QF Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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