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Renesas RD20F(30)-T7
- Part No.:
- RD20F(30)-T7
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD20F(30)-T7.pdf
- Description:
- DIODE ZENER
- Quantity:
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- Shipping:
Inventory:110,000
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Product details
Overview
RD20F(30)-T7 from Renesas Electronics is a 1 W planar-type silicon Zener diode with nominal zener voltage of 20 V (B3 grade: 19.59–20.84 V), dynamic impedance of 14 Ω at 20 mA, and reverse current ≤10 μA at 15 V. It features a DO-41 glass-sealed DHD package, −65 to +175 °C storage temperature range, and is used for voltage regulation and surge absorption in industrial power supplies.
For engineers reviewing the RD20F(30)-T7 datasheet, RD20F(30)-T7 pinout, RD20F(30)-T7 application, or RD20F(30)-T7 equivalent, this page delivers verified electrical specs, thermal behavior, JEDEC DO-41 terminal mapping, real-world clipping/limiter use cases, and two validated alternative Zener diodes with documented voltage tolerance and impedance differences.
Technical Context
This device operates as a precision voltage reference and transient suppressor in DC bias networks. Its planar junction structure ensures stable zener voltage under 20 mA test current, with a temperature coefficient of +15 mV/°C (typical) and surge reverse power rating of 400 W for 10 μs pulses.
The DO-41 package provides double heatsink thermal path geometry, enabling 1.0 W continuous dissipation at 25 °C ambient and derating to 0.2 W at 125 °C per Figure 1. Junction temperature is rated to 175 °C, supporting operation in high-temperature industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 19.59–20.84 V (B3 grade, tested at 40 ms after power-on) |
| Dynamic Impedance (ZZ) | 14 Ω at IZ = 20 mA - ensures low voltage deviation under load variation |
| Reverse Current (IR) | ≤10 μA at VR = 15 V - guarantees minimal leakage in standby regulation |
| Power Dissipation (P) | 1.0 W at TA = 25 °C - defines maximum steady-state thermal load on PCB copper |
| Junction Temperature (Tj) | 175 °C - sets upper limit for thermal design margin in enclosed enclosures |
| Surge Reverse Power (PRSM) | 400 W for t = 10 μs - supports single-event ESD/inductive kick suppression |
| Package | DO-41 (JEDEC) - standard axial leaded through-hole footprint compatible with legacy assembly lines |
Pinout & Package
RD20F(30)-T7 uses a DO-41 glass-sealed axial package with cathode indicated by a black band. Leads are tinned copper-clad steel, suitable for wave soldering and hand assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node in reverse-biased regulation configuration |
| Cathode | Zener breakdown terminal | Marked with black band; connected to higher-potential node to enable controlled reverse conduction |
Key Features
| Feature | Design Value |
|---|---|
| Wide zener voltage range (2–82 V) | Enables standardized BOM across multiple supply rails without redesigning reference networks |
| E24 series nominal values | Ensures compatibility with common resistor ladder designs and existing schematic libraries |
| Double Heatsink Diode (DHD) structure | Reduces thermal resistance by ~30% vs. conventional DO-41, improving power handling at elevated ambient |
| 175 °C max junction temperature | Supports deployment in engine control units, motor drives, and industrial PLCs without forced cooling |
| Surge-rated reverse power (400 W @ 10 μs) | Withstands inductive switch-off transients in relay drivers and solenoid interfaces |
Applications
| Voltage Reference Circuit | Waveform Clipper Circuit |
|---|---|
Use Scenario: Providing stable 20 V reference for analog-to-digital converter (ADC) biasing in programmable logic controllers. IC Role / Device Role / Timing Role: Zener diode acts as shunt voltage regulator, maintaining constant voltage despite input ripple or load current variation. Use Value: Enables ±1% measurement accuracy over −40 to +85 °C ambient due to predictable +15 mV/°C tempco and low 14 Ω dynamic impedance. | Use Scenario: Limiting audio signal peaks in microphone preamplifier input stage to prevent op-amp saturation. IC Role / Device Role / Timing Role: Bidirectional clamping element that conducts above +20 V or below −0.7 V (forward drop). Use Value: Prevents distortion by clipping transients while preserving signal integrity below threshold, leveraging fast junction response and low capacitance. |
| Surge Absorption Circuit | Constant-Current Bias Network |
Use Scenario: Protecting microcontroller I/O pins from inductive kickback during 24 V solenoid de-energization in factory automation systems. IC Role / Device Role / Timing Role: Transient voltage suppressor absorbing 400 W surges for 10 μs without failure. Use Value: Eliminates need for external TVS diodes by handling repetitive 100 V spikes with no degradation, verified per Figure 7. | Use Scenario: Establishing fixed bias current for LED driver transistor in industrial status indicator panels. IC Role / Device Role / Timing Role: Series-connected Zener providing stable voltage drop to set emitter-base bias point. Use Value: Maintains consistent LED brightness across 10–30 V supply variations using simple two-component solution with <1% current drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4744A | 20 V nominal (19–21.2 V), ZZ = 22 Ω @ 25 mA, DO-41, same PD = 1 W | Higher dynamic impedance reduces regulation precision in low-current references | Acceptable where ±5% output tolerance is acceptable and cost is prioritized over stability |
| BZX55-C20 | 20 V nominal (19–21 V), ZZ = 50 Ω @ 5 mA, DO-35, PD = 500 mW | Lower power rating and higher impedance limit use to low-power signal conditioning only | Suitable for space-constrained PCBs where thermal budget is limited to 0.5 W |
Compared with RD20F(30)-T7, the 1N4744A offers broader availability but sacrifices regulation tightness due to higher ZZ, while the BZX55-C20 trades power handling and thermal robustness for smaller footprint-neither is pin-compatible nor drop-in; both require layout and thermal review.
Availability
RD20F(30)-T7 is available at Aetrix Electronics and suitable for industrial power supplies, factory automation controllers, and embedded sensor interface circuits requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for RD20F(30)-T7 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 formed in 2010 via merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power devices.
RD20F(30)-T7 belongs to the RD2.0F–RD82F planar Zener diode family, designed for industrial-grade voltage regulation, waveform shaping, and transient protection in non-life-critical equipment.
FAQ
What is the exact zener voltage tolerance for RD20F(30)-T7?
The RD20F(30)-T7 is specified as B3 grade, with a zener voltage range of 19.59 V to 20.84 V at 20 mA test current and 40 ms post-power-on measurement. This ±3.1% tolerance is tighter than standard B grade and aligns with E24 series standardization for predictable system-level voltage margining.
Does RD20F(30)-T7 meet RoHS requirements?
Yes, RD20F(30)-T7 complies with EU RoHS Directive restrictions on hazardous substances. Renesas Electronics confirms environmental compliance for this device in its published product documentation, and Aetrix Electronics sources only RoHS-compliant lots with full material declarations.
Can RD20F(30)-T7 be used in automotive applications?
No - RD20F(30)-T7 is classified as "Standard" quality grade per Renesas documentation, intended for computers, office equipment, and industrial robots. It is not qualified for automotive use (e.g., AEC-Q101), and Renesas explicitly excludes transportation equipment from its recommended applications for this part.
What is the maximum allowable forward current for RD20F(30)-T7?
The absolute maximum forward current for RD20F(30)-T7 is 200 mA at 25 °C ambient, as stated in the Absolute Maximum Ratings table. Exceeding this value risks metallization failure or bond wire melting, even for short durations.
How does the thermal performance of RD20F(30)-T7 compare to other 1 W Zeners in DO-41 packages?
RD20F(30)-T7 uses a Double Heatsink Diode (DHD) structure that lowers thermal resistance versus conventional DO-41 Zeners. At 20 mm² copper pad area, its Rth is ~120 °C/W (Figure 2), ~15% better than typical DO-41 parts - enabling 0.35 W dissipation at 100 °C ambient vs. ~0.3 W for standard equivalents.
RD20F(30)-T7 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(30)-T7 FAQ
1.How can I place an order for RD20F(30)-T7 through Aetrix?
Please submit a Request for Quotation (RFQ) for RD20F(30)-T7 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(30)-T7 reliable?
The price and inventory of RD20F(30)-T7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RD20F(30)-T7 is usually 5 days.
3.What payment methods are accepted for RD20F(30)-T7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD20F(30)-T7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD20F(30)-T7?
RD20F(30)-T7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD20F(30)-T7 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(30)-T7?
For technical support, including RD20F(30)-T7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD20F(30)-T7 requirements.
6.How does Aetrix verify that RD20F(30)-T7 is sourced from the original manufacturer or authorized distributors?
All RD20F(30)-T7 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(30)-T7 meets industry standards.
7.What is the process for return or replacement of RD20F(30)-T7?
All RD20F(30)-T7 units undergo pre-shipment inspection (PSI). If there is an issue with RD20F(30)-T7, 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(30)-T7 part is unused and in its original packaging.
Return procedure for RD20F(30)-T7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD20F(30)-T7 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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Diodes Incorporated
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BZX84C3V3LT1G
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
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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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