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Diodes Incorporated BZX84C20S-7
- Part No.:
- BZX84C20S-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Zener Diode Arrays
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
BZX84C20S-7.pdf
- Description:
- DIODE ZENER ARRAY 20V SOT363
- Quantity:
- Payment:
- Shipping:
Inventory:2,477
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Product details
Overview
BZX84C20S-7 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), 55 Ω maximum Zener impedance at test current, and −3.5 to +0.2 mV/°C temperature coefficient. It provides precision voltage regulation in compact power management circuits such as voltage reference and overvoltage protection.
For engineers reviewing the BZX84C20S-7 datasheet, BZX84C20S-7 pinout, BZX84C20S-7 application, or BZX84C20S-7 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (625 °C/W), reverse leakage (<0.1 µA at 14.0 V), low-capacitance operation (<10 pF), and RoHS-compliant lead-free plating.
Technical Context
This dual-Zener device integrates two independent Zener junctions in a single SOT-363 package with common cathode configuration (C1/A1/A2/C2/NC/NC pinout). It operates under standard 25 °C ambient conditions with 5 mA test current and supports stable regulation across −65 to +150 °C operating temperature range.
The device uses planar die construction for repeatable breakdown characteristics and features ultra-low moisture sensitivity (Level 1 per J-STD-020D) and UL 94V-0 flammability-rated molding compound. Its thermal resistance of 625 °C/W assumes mounting on FR4 PCB with recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20 V nominal, 18.8–21.2 V range at 5 mA - defines regulated output voltage window under standard bias |
| Power Dissipation (PD) | 200 mW - limits continuous DC power handling without derating above 25 °C ambient |
| Zener Impedance (ZZT) | 55 Ω max at 5 mA - determines regulation stiffness and AC ripple rejection capability |
| Reverse Leakage (IR) | 0.1 µA max at 14.0 V - ensures minimal standby current in voltage-sense or clamping paths |
| Temp Coefficient (αVZ) | −3.5 to +0.2 mV/°C - quantifies drift of regulation point over industrial temperature range |
| Thermal Resistance (RθJA) | 625 °C/W - sets junction-to-ambient temperature rise per milliwatt dissipated |
| Package | SOT-363 - 6-pin ultra-small outline transistors package with dual anode/cathode topology |
Pinout & Package
SOT-363 plastic molded package with 6 terminals, UL 94V-0 flammability rating, 0.006 g mass, and matte tin-plated Alloy 42 leadframe. Moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| C1 | Cathode 1 | Primary cathode connection for first Zener junction |
| A1 | Anode 1 | Anode terminal for first Zener junction |
| A2 | Anode 2 | Anode terminal for second Zener junction |
| C2 | Cathode 2 | Secondary cathode connection for second Zener junction |
| NC | No Connect | Unbonded pin - electrically isolated, must not be soldered or tied |
| NC | No Connect | Unbonded pin - electrically isolated, must not be soldered or tied |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent Zener junctions | Enables dual-rail voltage reference or bidirectional clamping in one footprint |
| 200 mW power rating | Supports moderate-current regulation without external heat sinking on FR4 PCB |
| Lead-free / RoHS compliant | Meets global environmental compliance requirements for commercial and industrial assembly |
| Planar die construction | Delivers tight Zener voltage distribution and stable long-term parametric performance |
| Ultra-small SOT-363 package | Reduces board area by >50% vs. SO-8 or SOT-23 dual-diode alternatives |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Precision 20 V reference generation for ADC voltage reference or DAC feedback loop. IC Role / Device Role / Timing Role: Zener diode providing stable, low-drift DC reference voltage. Use Value: 55 Ω Zener impedance and ±0.6 V tolerance ensure <0.5% reference error at 5 mA bias. | Use Scenario: Protection of microcontroller I/O pins against transient surges exceeding 20 V. IC Role / Device Role / Timing Role: Bidirectional shunt clamp limiting voltage swing to safe levels. Use Value: Dual-junction structure allows symmetrical clamping without external series components. |
| Signal Level Shifting | Temperature-Stable Biasing |
Use Scenario: Level-shifting analog sensor outputs to match 20 V full-scale input range of industrial DAQ systems. IC Role / Device Role / Timing Role: Zener-based offset generator establishing fixed DC bias point. Use Value: −3.5 to +0.2 mV/°C tempco enables <±10 mV drift over −40 to +85 °C operating range. | Use Scenario: Biasing op-amp input stages requiring stable quiescent voltage in wide-temperature environments. IC Role / Device Role / Timing Role: Precision voltage source setting operating point for analog circuitry. Use Value: Low 0.1 µA reverse leakage minimizes error current injection into high-impedance nodes. |
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 12 V Zener, SOT-363, 225 mW, 30 Ω ZZT | Lower voltage, single-junction only - requires two devices for dual-rail use | Select when only one regulated rail is needed and tighter ZZT is critical |
| BZX84C20LT1G | Single 20 V Zener, SOT-23, 350 mW, 50 Ω ZZT, higher PD | Higher power, single-device solution - lacks dual-junction integration | Select when board space permits larger SOT-23 and higher dissipation is required |
Compared with MMBZ5242BS-7-F and BZX84C20LT1G, BZX84C20S-7 uniquely delivers dual 20 V Zener functionality in SOT-363, enabling space-constrained dual-rail designs without sacrificing regulation accuracy or thermal margin.
Availability
BZX84C20S-7 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and medical sensor interfaces requiring stable component supply and RoHS-compliant sourcing.
Supply support for BZX84C20S-7 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, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.
This part belongs to the BZX84C series of dual Zener diodes designed specifically for compact, high-reliability voltage regulation and transient suppression in space-constrained consumer, industrial, and automotive electronics.
FAQ
What is the maximum reverse voltage this device can withstand before breakdown?
The BZX84C20S-7 has a nominal Zener voltage of 20 V with a guaranteed range of 18.8–21.2 V at 5 mA test current. Breakdown occurs within this range; it is not rated for sustained reverse voltage beyond its specified VZ window. Operation above 21.2 V risks irreversible avalanche degradation unless current-limited.
Can this dual-Zener device be used for bidirectional ESD protection?
No - the BZX84C20S-7 is not characterized or rated for ESD protection. Its 200 mW power rating and lack of defined clamping waveform response make it unsuitable for IEC 61000-4-2 events. Dedicated TVS diodes like D3V3M1U2SOT-7-F are recommended for ESD-critical interfaces.
Is the SOT-363 package compatible with standard reflow profiles?
Yes - the SOT-363 package is qualified for lead-free reflow per J-STD-020D Level 1 moisture sensitivity. Peak reflow temperature up to 260 °C is supported with standard ramp rates and dwell times; no pre-bake is required prior to assembly.
How does temperature affect regulation accuracy in practical use?
At 5 mA test current, the temperature coefficient ranges from −3.5 to +0.2 mV/°C. Over a −40 to +85 °C ambient range, total VZ drift is ≤ ±150 mV - verified in production testing and reflected in the 18.8–21.2 V min/max spec at 25 °C.
BZX84C20S-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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 FAQ
1.How can I place an order for BZX84C20S-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C20S-7 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 reliable?
The price and inventory of BZX84C20S-7 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 is usually 5 days.
3.What payment methods are accepted for BZX84C20S-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C20S-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C20S-7?
BZX84C20S-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C20S-7 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?
For technical support, including BZX84C20S-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C20S-7 requirements.
6.How does Aetrix verify that BZX84C20S-7 is sourced from the original manufacturer or authorized distributors?
All BZX84C20S-7 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 meets industry standards.
7.What is the process for return or replacement of BZX84C20S-7?
All BZX84C20S-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C20S-7, 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 part is unused and in its original packaging.
Return procedure for BZX84C20S-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84C20S-7 Tags
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