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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Zener Diode Arrays

Diodes Incorporated BZX84C20S-7-F

Name: BZX84C20S-7-F
Brand: Diodes Incorporated
SKU: BZX84C20S-7-F
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX84C20S-7-F

Manufacturer:: Diodes Incorporated

Category:: Zener Diode Arrays

Package:: 6-TSSOP, SC-88, SOT-363

Datasheet:: BZX84C20S-7-F.pdf

Description:: DIODE ZENER ARRAY 20V SOT363

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Inventory:5,000

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Product details

Overview

BZX84C20S-7-F from Diodes Incorporated is a dual 200 mW surface-mount Zener diode in SOT-363 package, rated for 20 V nominal Zener voltage (18.8–21.2 V range at 5 mA), with 55 Ω maximum Zener impedance at test current and 0.1 µA maximum reverse leakage at 14 V. It serves as a precision voltage reference or overvoltage clamp in low-power analog signal conditioning circuits.

For engineers reviewing the BZX84C20S-7-F datasheet, BZX84C20S-7-F pinout, BZX84C20S-7-F application, or BZX84C20S-7-F equivalent, key selection criteria include Zener voltage tolerance, dynamic impedance at operating current, thermal resistance (625 °C/W), and SOT-363 footprint compatibility with high-density PCB layouts.

Technical Context

This device implements a planar silicon Zener junction optimized for stable reverse-breakdown regulation under DC or low-frequency transient conditions. Its dual-die SOT-363 configuration shares common cathode terminals (C1, C2) and independent anodes (A1, A2), enabling two independent clamping paths in one compact footprint.

Thermal performance is defined by FR4 board mounting per Diodes Inc. recommended pad layout (AP02001), delivering 200 mW power dissipation with 625 °C/W junction-to-ambient thermal resistance. Temperature coefficient is +14.4 to +18.0 mV/°C at 5 mA, indicating positive drift above 6 V nominal rating.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	20 V nominal, 18.8–21.2 V min/max at I_ZT = 5 mA - defines regulated output voltage window under standard test conditions
Zener Impedance (Z_ZT)	55 Ω max at I_ZT = 5 mA - determines voltage deviation under load current changes
Power Dissipation (P_D)	200 mW at T_A = 25 °C - sets maximum continuous DC power handling on standard FR4 layout
Reverse Leakage (I_R)	0.1 µA max at V_R = 14 V - ensures minimal quiescent current in standby clamp configurations
Thermal Resistance (R_θJA)	625 °C/W - quantifies temperature rise per watt dissipated; requires thermal-aware layout for >100 mW operation
Temperature Coefficient	+14.4 to +18.0 mV/°C at I_ZT = 5 mA - specifies voltage drift magnitude and polarity across operating temperature range

Pinout & Package

SOT-363 (SC-70-6) plastic surface-mount package with six terminals: two cathodes (C1, C2), two anodes (A1, A2), and two no-connect (NC) pins. Molded UL 94V-0 plastic case; matte tin-plated Alloy 42 leadframe; moisture sensitivity level 1.

Pin/Terminal	Circuit Role	Design Meaning
C1	Cathode 1	Common return path for first Zener element; tied to ground or reference rail in shunt regulator
A1	Anode 1	Input node for first Zener; connects to voltage source requiring clamping or regulation
NC	No Connect	Unbonded terminal; must remain unconnected and unstubbed on PCB
NC	No Connect	Unbonded terminal; must remain unconnected and unstubbed on PCB
A2	Anode 2	Input node for second Zener; enables independent clamping of dual signals or rails
C2	Cathode 2	Common return path for second Zener element; may be tied separately or shared with C1

Key Features

Feature	Design Value
Dual Zener elements in single SOT-363	Reduces board space by ~40% vs. two discrete SOT-23 Zeners; supports dual-rail protection without interposer routing
200 mW total power rating	Enables use in low-power sensor interfaces and microcontroller I/O protection where <200 mW dissipation is typical
Lead-free and RoHS-compliant construction	Meets IPC-J-STD-020D Level 1 moisture sensitivity; eliminates post-reflow baking for standard assembly
Planar die construction	Delivers tight Zener voltage distribution (±5% at 20 V) and stable long-term parametric drift under thermal cycling

Applications

Industrial Sensor Signal Conditioning

Microcontroller I/O Protection

Use Scenario: Clamping analog output of 4–20 mA transmitter to prevent overvoltage damage to ADC input.

IC Role / Device Role / Timing Role: Shunt Zener clamp limiting signal swing to ±20 V during ESD transients or wiring faults.

Use Value: Maintains signal integrity below 20 V while drawing <0.1 µA leakage at 14 V, minimizing offset error in precision measurement paths.

Use Scenario: Protecting GPIO pins of ARM Cortex-M0+ MCU against 12 V accidental contact in factory automation HMI.

IC Role / Device Role / Timing Role: Dual-anode Zener providing independent clamping for two adjacent I/O lines sharing one ground return.

Use Value: Enables simultaneous protection of UART TX/RX or SPI CLK/MOSI with single-component footprint and matched Zener characteristics.

Low-Power Reference Voltage Source

DC-DC Converter Feedback Divider Clamp

Use Scenario: Generating stable 20 V reference for comparator threshold in battery-powered smoke detector.

IC Role / Device Role / Timing Role: Precision Zener operating at 5 mA test current to deliver low-drift reference under varying load conditions.

Use Value: Achieves ±1.2 V regulation window (18.8–21.2 V) with +14.4 to +18.0 mV/°C TC, sufficient for non-critical threshold detection.

Use Scenario: Limiting feedback node voltage in adjustable buck converter using TLV431-based compensation.

IC Role / Device Role / Timing Role: Secondary clamp preventing feedback pin overvoltage during startup or light-load instability events.

Use Value: Prevents TLV431 latch-up by capping feedback voltage at 20 V before control loop responds, improving system robustness.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener regulation applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBZ5242BS-7-F	Single-element SOT-363 Zener; 12 V nominal; 100 mW rating; 30 Ω Z_ZT	Limited to single-rail clamping; lower power and voltage rating reduces headroom in 20 V systems	Select when only one regulated rail is needed and board area allows separate placement
BZX84C20LT1G	Single-element SOT-23; same 20 V rating; identical electrical specs but different package and pinout	Requires redesign of footprint and layout; lacks dual-element integration benefit	Choose if legacy SOT-23 compatibility is mandatory and dual functionality is unnecessary

Compared with MMBZ5242BS-7-F and BZX84C20LT1G, BZX84C20S-7-F uniquely delivers dual 20 V Zener functions in one SOT-363, reducing component count and interconnect in-space-constrained designs-critical for multi-signal sensor modules and compact industrial controllers.

Availability

BZX84C20S-7-F is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, microcontroller I/O protection, low-power reference voltage sources, and DC-DC converter feedback divider clamp applications requiring stable component supply and RoHS-compliant sourcing.

Supply support for BZX84C20S-7-F 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability, cost-optimized components for industrial, computing, and consumer markets.

The BZX84C series belongs to Diodes Inc.'s general-purpose Zener diode product line, designed specifically for voltage regulation, overvoltage protection, and reference generation in space-constrained surface-mount applications.

FAQ

What is the maximum continuous power dissipation for BZX84C20S-7-F?

The device is rated for 200 mW power dissipation at 25 °C ambient temperature when mounted on an FR4 PCB using Diodes Inc.'s recommended pad layout (AP02001). Derating begins linearly above 25 °C at 0.32 mW/°C, reaching zero at 150 °C ambient.

How are the dual Zener elements configured internally?

The SOT-363 package contains two independent Zener junctions sharing no internal connection: Cathode 1 (C1) and Anode 1 (A1) form the first element; Cathode 2 (C2) and Anode 2 (A2) form the second. The two NC pins are electrically isolated and unbonded.

Is BZX84C20S-7-F suitable for ESD protection per IEC 61000-4-2?

No - this part is not rated or characterized for ESD surge immunity. Its 200 mW DC power rating and 55 Ω dynamic impedance make it appropriate for low-energy clamping and voltage regulation, not transient suppression. Use dedicated TVS diodes like PESD5V0S1BA for IEC 61000-4-2 compliance.

What does the "-7-F" suffix indicate in the part number?

The "-7-F" denotes tape-and-reel packaging: 3000 units per reel, 8 mm tape width, with RoHS-compliant (lead-free) plating and Diodes Inc.'s green molding compound. It follows the ordering convention defined in DS30108 Rev. 17, Page 3.

BZX84C20S-7-F Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 6-TSSOP, SC-88, SOT-363

Packaging:: Tape & Reel (TR)

Product Status:: Active

Configuration:: 2 Independent

Voltage - Zener (Nom) (Vz):: 20 V

Tolerance:: ±6%

Power - Max:: 200 mW

Impedance (Max) (Zzt):: 55 Ohms

Current - Reverse Leakage @ Vr:: 100 nA @ 14 V

Voltage - Forward (Vf) (Max) @ If:: 900 mV @ 10 mA

Operating Temperature:: -65°C ~ 150°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-363

BZX84C20S-7-F FAQ

1.How can I place an order for BZX84C20S-7-F through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX84C20S-7-F 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 BZX84C20S-7-F reliable?

The price and inventory of BZX84C20S-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C20S-7-F is usually 5 days.

3.What payment methods are accepted for BZX84C20S-7-F?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C20S-7-F transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX84C20S-7-F?

BZX84C20S-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX84C20S-7-F 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 BZX84C20S-7-F?

For technical support, including BZX84C20S-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C20S-7-F requirements.

6.How does Aetrix verify that BZX84C20S-7-F is sourced from the original manufacturer or authorized distributors?

All BZX84C20S-7-F 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 BZX84C20S-7-F meets industry standards.

7.What is the process for return or replacement of BZX84C20S-7-F?

All BZX84C20S-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C20S-7-F, 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 BZX84C20S-7-F part is unused and in its original packaging.

Return procedure for BZX84C20S-7-F:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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