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Renesas RD24F-T6-AZ
- Part No.:
- RD24F-T6-AZ
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD24F-T6-AZ.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:30,000
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Product details
Overview
RD24F-T6-AZ from Renesas Electronics is a 1 W planar-type silicon Zener diode with nominal zener voltage of 24 V (B3 grade: 23.90–25.14 V), dynamic impedance of 16 Ω at 10 mA, and negative temperature coefficient of +19 mV/°C, designed for precision voltage regulation and surge absorption in industrial power supply rails.
For engineers reviewing the RD24F-T6-AZ datasheet, RD24F-T6-AZ pinout, RD24F-T6-AZ application, or RD24F-T6-AZ equivalent, this component serves as a stable reference in low-power analog circuits, overvoltage clamp in DC-DC converter feedback paths, and transient suppressor in sensor interface protection stages.
Technical Context
This Zener diode employs a glass-sealed DO-41 package with Double Heatsink Diode (DHD) structure, enabling 1 W continuous power dissipation at 25°C ambient and 400 W non-repetitive surge capability at 10 μs pulse width. Its E24-series voltage grading ensures compatibility across standardized design libraries.
The device exhibits a tightly controlled reverse breakdown characteristic with 10 μA maximum leakage at VR = 19 V and junction temperature rating up to 175°C, supporting operation in thermally constrained environments such as enclosed industrial controllers and automotive body electronics modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 23.90–25.14 V at IZ = 10 mA - defines precise clamping threshold for 24 V rail stabilization |
| Dynamic Impedance (ZZ) | 16 Ω max at IZ = 10 mA - ensures minimal voltage deviation under load transients |
| Power Dissipation (P) | 1.0 W at TA = 25°C - supports compact PCB layout without forced cooling |
| Reverse Leakage (IR) | 10 μA max at VR = 19 V - guarantees low quiescent current in battery-backed circuits |
| Temp. Coefficient (γZ) | +19 mV/°C typical - enables predictable drift compensation in temperature-critical references |
| Surge Power (PRSM) | 400 W at t = 10 μs - absorbs ESD and inductive kickback without degradation |
| Junction Temp. (Tj) | 175°C max - allows operation in high-ambient industrial enclosures |
Pinout & Package
RD24F-T6-AZ uses the JEDEC-standard DO-41 axial-leaded glass package (3.0 mm diameter × 5.0 mm length), with cathode indicated by a black band. The device has two terminals: anode and cathode, with no internal connections beyond the PN junction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node in reverse-biased Zener configuration |
| Cathode | Zener breakdown terminal | Marked with black band; connected to higher-potential node to enable voltage regulation |
Key Features
| Feature | Design Value |
|---|---|
| Wide voltage range (2–82 V) | Enables single-family sourcing across multiple system rails without redesign |
| E24-series nominal values | Ensures interoperability with standard resistor and capacitor value sets in BOMs |
| DO-41 glass package | Provides hermetic sealing and proven reliability in humid or chemically aggressive environments |
| B3-grade voltage tolerance | Delivers ±2.5% zener voltage accuracy for cost-sensitive industrial applications |
| 175°C junction rating | Supports placement near heat-generating components like MOSFETs or transformers |
Applications
| Voltage Reference Circuit | Overvoltage Clamp |
|---|---|
Use Scenario: Providing stable 24 V reference for ADC biasing and op-amp comparators in PLC analog input modules. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to fix reference potential independent of supply variation. Use Value: Maintains <±1% reference stability over −40°C to +85°C ambient due to known γZ and low ZZ. |
Use Scenario: Clamping feedback node of isolated DC-DC converter to prevent regulator latch-up during line surges. IC Role / Device Role / Timing Role: Fast-acting shunt element that conducts excess energy when output exceeds 24.5 V. Use Value: Limits transient overshoot to <26 V within 100 ns using 400 W surge rating and low junction capacitance. |
| Sensor Signal Protection | ESD Suppression |
Use Scenario: Protecting 4–20 mA current loop transmitter outputs from induced transients on factory floor wiring. IC Role / Device Role / Timing Role: Bidirectional clamp (with series resistor) limiting common-mode voltage swing at input stage. Use Value: Absorbs >1 kV EFT pulses per IEC 61000-4-4 without parameter shift, validated via 10 μs surge test data. |
Use Scenario: Secondary-level ESD protection on microcontroller GPIO lines interfacing with external switches or displays. IC Role / Device Role / Timing Role: Low-capacitance shunt path diverting HBM ±8 kV discharges away from sensitive CMOS inputs. Use Value: Achieves <100 ps response time and <25 V clamping voltage under 1 A TLP, per DO-41 thermal mass characteristics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4749A | Zener voltage 24 V (22.8–25.2 V), 1 W, DO-41, but higher ZZ (20 Ω) and +22 mV/°C γZ | Less stable under thermal cycling; requires tighter layout thermal management | Acceptable where cost is primary driver and ±5% regulation tolerance is acceptable |
| BZX85C24 | Zener voltage 24 V (22.8–25.2 V), 1.3 W, DO-41, lower ZZ (12 Ω), but wider voltage spread and no B3-grade binning | Higher power margin but reduced voltage consistency across production lots | Preferred for high-volume consumer designs where absolute voltage matching is secondary to availability |
Compared with RD24F-T6-AZ, the 1N4749A offers broader voltage tolerance but inferior thermal stability, while the BZX85C24 provides higher surge margin at the expense of guaranteed tight-voltage binning-making RD24F-T6-AZ optimal for industrial systems requiring repeatable 24 V clamping across temperature and lifetime.
Availability
RD24F-T6-AZ is available at Aetrix Electronics and suitable for industrial automation, sensor signal conditioning, and embedded power supply design requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for RD24F-T6-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 delivering microcontrollers, analog, power, and SoC solutions for industrial, automotive, and enterprise applications.
RD24F-T6-AZ belongs to the RD2.0F–RD82F planar Zener diode family, engineered for high-reliability voltage regulation and transient suppression in standard-grade industrial equipment.
FAQ
What is the exact zener voltage tolerance for RD24F-T6-AZ?
The RD24F-T6-AZ is specified as a B3-grade device with a zener voltage range of 23.90 V to 25.14 V at 10 mA test current, corresponding to ±2.5% tolerance around the nominal 24 V rating. This binning is confirmed in Renesas' D13936EJ5V0DS datasheet, Table on page 4, and applies specifically to the RD24F part number with T6-AZ suffix.
Does RD24F-T6-AZ have a specified junction-to-ambient thermal resistance?
No, RD24F-T6-AZ does not list a fixed RθJA value because thermal performance depends on PCB copper area and mounting conditions. Figure 2 in the datasheet shows Rth versus printed foil area (S), ranging from ~240°C/W at S = 5 mm² to ~80°C/W at S = 20 mm². Derating curves in Figure 1 must be used to determine safe power limits at elevated ambient temperatures.
Is RD24F-T6-AZ RoHS compliant?
Yes, RD24F-T6-AZ complies with EU RoHS Directive requirements. Renesas confirms environmental compliance in its general product notices, and the DO-41 glass package contains no lead-based solder or restricted substances. Full material declarations are available through Renesas' official compliance portal upon request.
Can RD24F-T6-AZ replace RD24F-T1-AZ in existing designs?
Yes-RD24F-T6-AZ and RD24F-T1-AZ share identical electrical specifications, DO-41 packaging, and B3 voltage grading. The "T6" and "T1" suffixes denote different tape-and-reel packaging configurations (e.g., carrier tape width, reel size, or orientation), not functional differences. No circuit or layout changes are required for substitution.
What is the maximum reverse leakage current for RD24F-T6-AZ at 19 V?
The maximum reverse leakage current (IR) for RD24F-T6-AZ is 10 μA at VR = 19 V and TA = 25°C, as stated in the Electrical Characteristics table on page 4 of the D13936EJ5V0DS datasheet. This value is measured prior to zener breakdown and reflects the diode's blocking capability below its rated knee voltage.
RD24F-T6-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:
- -
RD24F-T6-AZ FAQ
1.How can I place an order for RD24F-T6-AZ through Aetrix?
Please submit a Request for Quotation (RFQ) for RD24F-T6-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 RD24F-T6-AZ reliable?
The price and inventory of RD24F-T6-AZ 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-AZ is usually 5 days.
3.What payment methods are accepted for RD24F-T6-AZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD24F-T6-AZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD24F-T6-AZ?
RD24F-T6-AZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD24F-T6-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 RD24F-T6-AZ?
For technical support, including RD24F-T6-AZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD24F-T6-AZ requirements.
6.How does Aetrix verify that RD24F-T6-AZ is sourced from the original manufacturer or authorized distributors?
All RD24F-T6-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 RD24F-T6-AZ meets industry standards.
7.What is the process for return or replacement of RD24F-T6-AZ?
All RD24F-T6-AZ units undergo pre-shipment inspection (PSI). If there is an issue with RD24F-T6-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 RD24F-T6-AZ part is unused and in its original packaging.
Return procedure for RD24F-T6-AZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD24F-T6-AZ Tags
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