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Renesas RD24F-T6
- Part No.:
- RD24F-T6
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD24F-T6.pdf
- Description:
- DIODE ZENER
- Quantity:
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- Shipping:
Inventory:242,500
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Product details
Overview
RD24F-T6 from Renesas Electronics is a 1 W planar-type silicon Zener diode in DO-41 glass-sealed DHD package, with nominal zener voltage 24 V (B3 grade: 23.90–25.14 V), dynamic impedance ≤16 Ω at 10 mA, and temperature coefficient +19 mV/°C, used for precision voltage regulation and surge protection in power supply feedback loops.
For engineers reviewing the RD24F-T6 datasheet, RD24F-T6 pinout, RD24F-T6 application, or RD24F-T6 equivalent, this page delivers verified electrical specs, thermal behavior, JEDEC DO-41 terminal mapping, and direct alternative options for voltage reference and transient suppression circuits.
Technical Context
This Zener diode operates in reverse breakdown mode with tightly controlled voltage tolerance (±2.6% for B3 grade), low dynamic impedance enabling stable regulation under varying load currents, and a positive temperature coefficient (+19 mV/°C) that supports temperature-compensated reference designs when paired with negative-coefficient devices.
Its DO-41 package provides 175°C junction temperature rating, 400 W surge reverse power capability at 10 μs pulse width, and thermal resistance optimized for PCB copper area ≥20 mm² - making it suitable for industrial power rails where transient immunity and long-term stability are required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 23.90–25.14 V (B3 grade, tested at 40 ms after power-on; defines regulation setpoint accuracy) |
| Power Dissipation (P) | 1.0 W at TA = 25°C; derates linearly above 25°C per Figure 1 - sets max continuous DC power handling |
| Dynamic Impedance (ZZ) | ≤16 Ω at IZ = 10 mA; ensures minimal output voltage shift under load transients |
| Zener Voltage Tempco (γZ) | +19 mV/°C (typical); enables predictable drift compensation in reference circuits |
| Surge Reverse Power (PRSM) | 400 W at t = 10 μs (non-repetitive); supports ESD and lightning-induced transient clamping |
| Junction Temperature (Tj) | −65 to +175°C; allows operation in harsh ambient environments without thermal runaway |
| Reverse Current (IR) | ≤10 μA at VR = 19 V; guarantees low leakage in high-impedance bias networks |
Pinout & Package
RD24F-T6 uses the JEDEC DO-41 axial-leaded glass package (3.0 mm Ø × 5.0 mm max length), with cathode indicated by black band. The device has two terminals: anode and cathode - no internal circuitry or multi-pin functionality.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node in reverse-bias regulation; carries forward current up to 200 mA |
| Cathode | Zener breakdown terminal | Marked with black band; connected to higher-potential node; sustains regulated reverse voltage during operation |
Key Features
| Feature | Design Value |
|---|---|
| Wide zener voltage range (2–82 V) | Enables single-family standardization across diverse supply rail voltages in industrial and consumer systems |
| E24 series nominal values | Ensures compatibility with standard resistor/capacitor value selection and simplifies BOM consolidation |
| Planar-type glass-sealed DHD structure | Delivers superior thermal cycling reliability and hermetic moisture resistance vs. epoxy-packaged alternatives |
| B1/B2/B3 grading option | Allows precise binning for tight-tolerance applications (e.g., B3 ±2.6% for RD24F-T6) without custom design |
| 175°C maximum junction temperature | Supports deployment in engine control units, motor drives, and other high-ambient-temperature environments |
Applications
| Voltage Reference Circuit | Surge Absorption Circuit |
|---|---|
Use Scenario: Providing stable 24 V reference for op-amp comparators and ADC voltage dividers in programmable logic controllers. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to clamp reference node at precise DC potential. Use Value: Maintains ±2.6% regulation over temperature and line variations, reducing calibration drift in analog signal chains. | Use Scenario: Protecting microcontroller I/O pins from inductive kickback in 24 V solenoid driver modules. IC Role / Device Role / Timing Role: Transient voltage suppressor shunting surge energy to ground before reaching sensitive inputs. Use Value: Withstands 400 W non-repetitive surges at 10 μs, preventing latch-up or permanent damage to downstream logic. |
| Constant-Current Source | Waveform Clipper Circuit |
Use Scenario: Biasing LED strings in industrial status indicators requiring stable current despite input voltage fluctuations. IC Role / Device Role / Timing Role: Zener diode combined with series transistor to form active current regulator. Use Value: Dynamic impedance ≤16 Ω ensures <1% current variation over 10–100 mA load range. | Use Scenario: Limiting audio signal peaks in analog mixer front-ends to prevent amplifier saturation. IC Role / Device Role / Timing Role: Bidirectional clipping element (with second diode) constraining signal amplitude to ±24 V envelope. Use Value: Sharp reverse breakdown knee and low ZZ enable clean, repeatable clipping without distortion or hysteresis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4749A | 24 V nominal, ±5% tolerance (vs. RD24F-T6's ±2.6%), 1.0 W, DO-41, ZZ ≤20 Ω at 10 mA | Higher voltage tolerance reduces precision in reference designs but sufficient for general-purpose clamping | Select when cost sensitivity outweighs tight regulation needs; verify thermal layout for same power dissipation |
| BZX85C24 | 24 V nominal, ±5%, 1.3 W, DO-41, ZZ ≤35 Ω at 5 mA, Tj = 175°C | Higher power rating allows greater surge margin but higher impedance degrades regulation fidelity | Prefer for higher-energy transient environments where absolute clamping robustness > voltage accuracy |
Compared with RD24F-T6, 1N4749A offers broader availability and lower cost but sacrifices voltage precision and thermal stability; BZX85C24 trades tighter regulation for higher surge capacity and relaxed impedance - making RD24F-T6 optimal for applications demanding both accuracy and industrial-grade reliability.
Availability
RD24F-T6 is available at Aetrix Electronics and suitable for industrial power supplies, motor drive feedback networks, and embedded system voltage references requiring stable component supply, long-lifecycle support, and RoHS-compliant sourcing.
Supply support for RD24F-T6 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 delivering microcontrollers, analog, power, and timing solutions for automotive, industrial, and IoT applications.
RD24F-T6 belongs to the RD2.0F–RD82F planar Zener diode family, engineered for high-reliability voltage regulation and transient suppression in industrial-grade power management systems.
FAQ
What is the exact zener voltage tolerance for RD24F-T6?
The RD24F-T6 is specified in the B3 grade, with a zener voltage range of 23.90 V to 25.14 V at test current IZ = 10 mA and TA = 25°C. This corresponds to a ±2.6% tolerance about the nominal 24 V value, confirmed in the official Renesas datasheet D13936EJ5V0DS.
Does RD24F-T6 have a defined cathode marking, and how is polarity identified?
Yes, RD24F-T6 features a black band on the glass body indicating the cathode terminal. This marking aligns with JEDEC DO-41 standards and is visible under standard visual inspection - critical for correct orientation in reverse-bias regulation circuits where cathode connects to the higher-potential node.
What is the maximum allowable surge reverse power for RD24F-T6, and under what conditions?
RD24F-T6 supports a non-repetitive surge reverse power of 400 W at pulse width t = 10 μs and ambient temperature TA = 25°C, as specified in Figure 7 of the Renesas datasheet. This rating assumes single-event stress and requires adequate PCB copper area (≥20 mm²) for thermal dissipation between surges.
How does the temperature coefficient of RD24F-T6 affect its performance in a voltage reference design?
The RD24F-T6 exhibits a typical zener voltage temperature coefficient of +19 mV/°C. In voltage reference applications, this positive drift must be compensated - for example, by pairing with a negative-tempco component or using it in a temperature-stabilized oven-controlled circuit - to maintain sub-0.1% reference stability over −40°C to +85°C.
Is RD24F-T6 compliant with RoHS and lead-free assembly requirements?
Yes, RD24F-T6 meets EU RoHS Directive requirements for restricted substances. As a Renesas Electronics product manufactured post-2006, it is lead-free compatible and qualified for reflow soldering per J-STD-020, with no exemptions required - supporting environmentally compliant industrial and consumer manufacturing.
RD24F-T6 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:
- -
RD24F-T6 FAQ
1.How can I place an order for RD24F-T6 through Aetrix?
Please submit a Request for Quotation (RFQ) for RD24F-T6 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 RD24F-T6 reliable?
The price and inventory of RD24F-T6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RD24F-T6 is usually 5 days.
3.What payment methods are accepted for RD24F-T6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD24F-T6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD24F-T6?
RD24F-T6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD24F-T6 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 RD24F-T6?
For technical support, including RD24F-T6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD24F-T6 requirements.
6.How does Aetrix verify that RD24F-T6 is sourced from the original manufacturer or authorized distributors?
All RD24F-T6 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 RD24F-T6 meets industry standards.
7.What is the process for return or replacement of RD24F-T6?
All RD24F-T6 units undergo pre-shipment inspection (PSI). If there is an issue with RD24F-T6, 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 RD24F-T6 part is unused and in its original packaging.
Return procedure for RD24F-T6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD24F-T6 Tags
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