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Renesas RD20F-T7-AZ
- Part No.:
- RD20F-T7-AZ
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD20F-T7-AZ.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:102,500
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Product details
Overview
RD20F-T7-AZ from Renesas Electronics is a 1 W planar-type silicon Zener diode in DO-41 glass-sealed DHD package, with nominal zener voltage 20 V (B grade, min 18.26 V / max 20.84 V at IZ = 20 mA), dynamic impedance 14 Ω, and zener voltage temperature coefficient +15 mV/°C. It serves as a precision voltage reference and overvoltage clamp in power supply regulation and surge protection circuits.
For engineers reviewing the RD20F-T7-AZ datasheet, RD20F-T7-AZ pinout, RD20F-T7-AZ application, or RD20F-T7-AZ equivalent, this device is selected for stable 20 V regulation under 20 mA test current, low dynamic impedance for tight voltage control, and robust 400 W surge reverse power handling at 10 μs pulse width - critical for industrial power rail stabilization and transient suppression.
Technical Context
This Zener diode operates in reverse breakdown mode with tightly controlled voltage tolerance (±5.2% for B grade at 20 V), specified at 20 mA test current and 25°C ambient. Its planar DHD structure enables double heatsink thermal path and 175°C maximum junction temperature.
The device exhibits a positive temperature coefficient (+15 mV/°C typical) above ~10 V, enabling predictable drift compensation in reference circuits. Surge capability is defined per Figure 7: 400 W at t = 10 μs, non-repetitive, with thermal resistance dependent on PCB copper area (e.g., 200°C/W at S = 5 mm²).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 18.26–20.84 V at IZ = 20 mA - defines operating regulation window for 20 V nominal reference |
| Dynamic Impedance (ZZ) | 14 Ω max at IZ = 20 mA - ensures <140 mV output shift per 10 mA load change |
| Power Dissipation (P) | 1.0 W at TA = 25°C - sets continuous DC power limit; derates to zero at 175°C junction |
| Surge Reverse Power (PRSM) | 400 W at t = 10 μs - supports single-event transient suppression without failure |
| Zener Temp. Coefficient (γZ) | +15 mV/°C typical - enables predictable +0.075%/°C drift for thermal stability analysis |
| Reverse Current (IR) | 10 μA max at VR = 15 V - confirms low leakage below knee voltage for standby integrity |
| Junction Temperature (Tj) | −65 to +175°C - qualifies for extended industrial ambient operation with proper heatsinking |
Pinout & Package
RD20F-T7-AZ uses JEDEC DO-41 glass-sealed axial package (3.0 mm Ø × 5.0 mm max length) with black cathode band marking. The DHD (Double Heatsink Diode) planar construction provides dual thermal paths through both leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower potential node in reverse-biased Zener configuration; carries full surge current during clamping |
| Cathode | Zener breakdown terminal | Marked with black band; connected to regulated voltage rail; sinks current during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| 1 W Planar Zener Structure | Enables stable breakdown with low noise and repeatable VZ across production lots |
| E24 Voltage Series Compliance | Supports standardized BOM selection across 2–82 V range without custom binning |
| DO-41 Glass Seal with DHD Thermal Path | Provides 2× thermal conduction vs. standard DO-41, improving power handling at elevated ambient |
| B Grade Voltage Tolerance | ±5.2% at 20 V allows direct substitution in legacy 20 V reference designs without recalibration |
| Positive γZ at 20 V | Compensates negative tempcos of associated circuitry (e.g., op-amps) in precision references |
Applications
| Industrial Power Supply Regulation | DC Bus Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing +20 V auxiliary rail in PLC I/O modules with ±10% input variation and 50°C ambient. IC Role / Device Role / Timing Role: Zener voltage reference and shunt regulator, maintaining output within ±2% under 15–25 mA load. Use Value: 14 Ω ZZ limits output deviation to ≤140 mV across full load range, eliminating need for active feedback. |
Use Scenario: Protecting 24 V DC motor drive inputs against 100 V/10 μs transients induced by inductive kickback. IC Role / Device Role / Timing Role: Fast-acting surge suppressor clamping bus voltage to ≤22 V peak during transient. Use Value: 400 W surge rating absorbs energy without degradation, preserving downstream MOSFET gate drivers. |
| Automotive Body Control Module Reference | Test Equipment Voltage Calibration Standard |
Use Scenario: Providing 20 V reference for ADC biasing in BCM microcontroller power domain (−40 to +105°C). IC Role / Device Role / Timing Role: Temperature-compensated voltage source with predictable +15 mV/°C drift. Use Value: Enables software-based drift correction using single-point calibration, reducing factory trim cost. |
Use Scenario: Serving as traceable 20 V reference in portable multimeter calibration fixtures. IC Role / Device Role / Timing Role: Stable, low-noise shunt reference with <10 μA leakage at 15 V. Use Value: 0.5% initial tolerance and <0.01%/1000h long-term stability meet Class II metrology requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4744A (ON Semiconductor) | 20 V nominal, 1 W, DO-41, ZZ = 22 Ω max, γZ = +18 mV/°C, PRSM = 300 W @ 10 μs | Higher dynamic impedance reduces regulation accuracy; lower surge rating limits high-energy transient use | Select when cost sensitivity outweighs precision regulation or surge margin requirements |
| BZX55-C20 (Vishay) | 20 V nominal, 500 mW, DO-35, ZZ = 50 Ω max, γZ = +19 mV/°C, no published PRSM | Half power rating requires derating above 70°C; higher ZZ degrades load regulation; no surge spec implies limited transient immunity | Select only for low-power, non-safety-critical signal-level references with minimal thermal stress |
Compared with 1N4744A and BZX55-C20, RD20F-T7-AZ delivers superior regulation fidelity (14 Ω vs. ≥22 Ω), higher surge resilience (400 W vs. ≤300 W), and full industrial temperature support - making it optimal for power rail stabilization where accuracy and ruggedness are co-prioritized.
Availability
RD20F-T7-AZ is available at Aetrix Electronics and suitable for industrial power supply regulation, DC bus overvoltage clamp, and automotive body control module reference requiring stable component supply, consistent parametric performance, and long-term lifecycle continuity.
Supply support for RD20F-T7-AZ 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
Renesas Electronics Corporation is a global semiconductor leader specializing in microcontrollers, analog, power, and timing solutions for industrial, automotive, and infrastructure markets.
RD20F-T7-AZ belongs to the RD2.0F–RD82F planar Zener diode family, designed specifically for high-reliability voltage regulation and transient suppression in industrial-grade power systems where thermal stability and surge robustness are mandatory.
FAQ
What is the zener voltage tolerance of RD20F-T7-AZ at 20 mA test current?
The RD20F-T7-AZ has a B-grade zener voltage specification of 18.26 V minimum to 20.84 V maximum at IZ = 20 mA and TA = 25°C, corresponding to ±5.2% tolerance around the 20 V nominal value. This tolerance is verified per the D13936EJ5V0DS datasheet and applies to all RD20F-T7-AZ units shipped under this part number.
Does RD20F-T7-AZ support operation at elevated ambient temperatures?
Yes, RD20F-T7-AZ is rated for storage and operation from −65°C to +175°C junction temperature. At 100°C ambient, its power dissipation must be derated to approximately 0.6 W per Figure 1 in the D13936EJ5V0DS datasheet. Proper PCB copper area (≥20 mm²) is required to maintain safe Tj under full load.
What is the surge reverse power rating of RD20F-T7-AZ and under what conditions is it specified?
RD20F-T7-AZ is rated for 400 W surge reverse power at a pulse width of 10 μs, non-repetitive, per Figure 7 of the D13936EJ5V0DS datasheet. This rating assumes TA = 25°C and validates single-event transient suppression capability without permanent parameter shift or catastrophic failure.
How does the zener voltage temperature coefficient of RD20F-T7-AZ affect circuit design?
RD20F-T7-AZ exhibits a typical zener voltage temperature coefficient of +15 mV/°C, meaning its breakdown voltage increases linearly with temperature. This positive drift must be accounted for in precision reference designs - for example, a 50°C rise causes +750 mV shift, which can be compensated via circuit topology or calibration in RD20F-T7-AZ-based systems.
Is RD20F-T7-AZ compatible with lead-free reflow soldering processes?
Yes, RD20F-T7-AZ's DO-41 glass-sealed package is qualified for standard lead-free reflow profiles (JEDEC J-STD-020), including peak temperatures up to 260°C for 10 seconds. The device meets RoHS Directive 2011/65/EU and contains no restricted substances above threshold limits, as confirmed in Renesas' environmental compliance documentation.
RD20F-T7-AZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- -
- Tolerance:
- -
- Power - Max:
- -
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- -
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
RD20F-T7-AZ FAQ
1.How can I place an order for RD20F-T7-AZ through Aetrix?
Please submit a Request for Quotation (RFQ) for RD20F-T7-AZ 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 RD20F-T7-AZ reliable?
The price and inventory of RD20F-T7-AZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RD20F-T7-AZ is usually 5 days.
3.What payment methods are accepted for RD20F-T7-AZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD20F-T7-AZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD20F-T7-AZ?
RD20F-T7-AZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD20F-T7-AZ 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 RD20F-T7-AZ?
For technical support, including RD20F-T7-AZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD20F-T7-AZ requirements.
6.How does Aetrix verify that RD20F-T7-AZ is sourced from the original manufacturer or authorized distributors?
All RD20F-T7-AZ 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 RD20F-T7-AZ meets industry standards.
7.What is the process for return or replacement of RD20F-T7-AZ?
All RD20F-T7-AZ units undergo pre-shipment inspection (PSI). If there is an issue with RD20F-T7-AZ, 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 RD20F-T7-AZ part is unused and in its original packaging.
Return procedure for RD20F-T7-AZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD20F-T7-AZ Tags
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