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Renesas RD2.4ES-AZ
- Part No.:
- RD2.4ES-AZ
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD2.4ES-AZ.pdf
- Description:
- DIODE ZENER
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Inventory:9,250
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Product details
Overview
RD2.4ES-AZ from Renesas Electronics is a 2.4 V, 400 mW glass-encapsulated zener diode in DO-34 package with DHD (Double Heatsink Diode) construction, ±5% zener voltage tolerance at 5 mA test current, 120 Ω dynamic impedance, and 1.0 µA reverse leakage at 0.5 V, used for precision voltage reference and overvoltage protection in low-power analog circuits.
For engineers reviewing the RD2.4ES-AZ datasheet, RD2.4ES-AZ pinout, RD2.4ES-AZ application, or RD2.4ES-AZ equivalent, this page delivers verified electrical specs, thermal performance data, DO-34 mechanical dimensions, and validated alternative parts for voltage regulation design-in.
Technical Context
This planar-processed zener diode operates in reverse breakdown with stable voltage regulation across 5–100 mA zener current range. Its DHD construction enables enhanced thermal dissipation from both ends of the axial leaded DO-34 package, supporting reliable operation up to 175°C junction temperature.
The device complies with E24 standard zener voltage grading and exhibits a negative temperature coefficient typical of low-voltage zeners (<5 V), with measured γZ ≈ −3.5 mV/°C per Fig. 9 - critical for temperature-sensitive biasing networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 2.33–2.52 V at IZ = 5 mA - defines tight regulation window for 2.4 V reference designs |
| Power Dissipation P | 400 mW at TA = 25°C - sets maximum continuous DC power handling before thermal derating |
| Dynamic Impedance ZZ | 120 Ω max at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Reverse Leakage IR | 1.0 µA max at VR = 0.5 V - ensures minimal error current in high-impedance reference nodes |
| Surge Power PRSM | 100 W for t = 10 µs - supports transient overvoltage clamping without failure |
| Junction Temperature Tj | −65 to +175°C - enables operation in industrial ambient environments with adequate PCB copper area |
| Package | DO-34 (JEDEC) - 2.4 mm max body length, 5 mm lead pitch, glass-sealed axial leads |
Pinout & Package
DO-34 package: axial-leaded, glass-encapsulated cylindrical body (φ2.0 mm max, L 2.4 mm max), cathode indicated by black band near one end. Leads are tinned copper, suitable for wave or hand soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection in shunt regulator | Connected to circuit ground or lowest potential node when used as voltage clamp |
| Cathode | Zener breakdown terminal / regulated output node | Connected to input supply via series resistor; provides stable 2.4 V reference at this node |
Key Features
| Feature | Design Value |
|---|---|
| DHD construction | Double heatsink path through both axial leads reduces thermal resistance, improving power handling at elevated ambient temperatures |
| Planar process | Enables precise control of breakdown voltage and low parametric drift over time and temperature |
| E24-standard VZ | Guarantees compatibility with standard resistor and capacitor value series for predictable analog design scaling |
| DO-34 glass seal | Provides hermetic reliability and moisture resistance without requiring conformal coating in non-condensing environments |
| Short-pitch mounting | 5 mm lead spacing allows dense placement on compact PCBs without lead bending or stress concentration |
Applications
| Voltage Reference for Op-Amp Biasing | Overvoltage Clamp in Sensor Interface |
|---|---|
Use Scenario: Providing stable 2.4 V reference to set common-mode voltage for rail-to-rail op-amps in battery-powered instrumentation. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise DC bias point independent of supply variation. Use Value: Maintains amplifier linearity and offset stability across 2.7–5.5 V supply range with <±10 mV drift over −40°C to +85°C. | Use Scenario: Protecting 3.3 V ADC input from ESD transients during field deployment of environmental sensors. IC Role / Device Role / Timing Role: Low-capacitance shunt clamp diverting surge energy before it reaches sensitive analog front-end. Use Value: Limits input voltage to ≤2.8 V during 10 µs surges up to 100 W, preventing latch-up or damage to downstream ICs. |
| Waveform Clipping in Audio Preamp | Constant Current Source for LED Bias |
Use Scenario: Soft-clipping symmetric audio signal peaks in portable microphone preamplifier to prevent digital clipping. IC Role / Device Role / Timing Role: Bidirectional voltage limiter (with series diode) shaping harmonic content at signal zero-crossings. Use Value: Delivers repeatable 2.4 V threshold with <5 ns response, preserving transient fidelity while reducing distortion by 12 dB THD. | Use Scenario: Setting fixed bias current for indicator LEDs in industrial HMI panels operating from unregulated 12 V rails. IC Role / Device Role / Timing Role: Zener-based current source using emitter-degenerated BJT topology. Use Value: Delivers 15 mA ±3% LED current across 10–14 V input range, eliminating need for precision resistors or IC regulators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4730A | 2.4 V nominal, 400 mW, DO-41 package (4.5 mm body length), 100 Ω ZZ, 1.0 µA IR | Larger footprint; higher thermal resistance due to longer body and plastic encapsulation | Preferred where legacy DO-41 layout exists and board space permits larger package |
| BZX55-C2V4 | 2.4 V nominal, 500 mW, DO-35 package (2.0 mm body), 150 Ω ZZ, 5.0 µA IR | Higher leakage and impedance; tighter tolerance not specified; RoHS-compliant lead finish | Suitable for cost-sensitive consumer designs where 5 µA leakage is acceptable and RoHS compliance is mandatory |
Compared with RD2.4ES-AZ, 1N4730A offers lower dynamic impedance but requires PCB rework for DO-41 pitch; BZX55-C2V4 fits smaller footprints but sacrifices regulation accuracy and leakage performance - choice depends on thermal, space, and compliance priorities.
Availability
RD2.4ES-AZ is available at Aetrix Electronics and suitable for voltage reference, overvoltage protection, waveform clipping, and constant current source applications requiring stable component supply and long-term industrial availability.
Supply support for RD2.4ES-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 Japanese semiconductor manufacturer formed in 2010 via merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power devices.
The RD2.4ES-AZ belongs to the RD2.0ES–RD39ES zener diode family designed for precision DC voltage regulation and transient suppression in industrial, office, and communications equipment under Standard quality grade.
FAQ
What is the zener voltage tolerance of RD2.4ES-AZ at 5 mA test current?
The RD2.4ES-AZ has a zener voltage range of 2.33 V to 2.52 V at IZ = 5 mA, corresponding to ±4.2% tolerance about the nominal 2.4 V rating. This specification is confirmed in the Electrical Characteristics table of Renesas datasheet D13935EJ7V0DS and applies strictly to the AB1 suffix variant of RD2.4ES-AZ.
Does RD2.4ES-AZ support surge protection, and what is its rated surge power?
Yes, RD2.4ES-AZ supports non-repetitive surge suppression with a rated surge reverse power (PRSM) of 100 W for pulse width t = 10 µs, as specified in the Absolute Maximum Ratings table. This capability enables use in transient voltage suppression applications such as I/O line clamping, provided series impedance limits peak current within safe operating area.
What is the thermal resistance characteristic of RD2.4ES-AZ, and how does PCB copper area affect it?
RD2.4ES-AZ exhibits junction-to-ambient thermal resistance (RthJA) that varies with PCB copper area: ~375°C/W on minimal copper, dropping to ~200°C/W with 10 mm² copper pad per lead (Fig. 7). The DHD construction leverages both leads for heat conduction, so symmetric copper pours significantly improve power derating above 25°C ambient.
Is RD2.4ES-AZ RoHS compliant, and what is its lead finish?
RD2.4ES-AZ was originally manufactured prior to full RoHS enforcement and uses standard tin-lead (SnPb) solderable leads. While Renesas does not list RoHS status for this legacy part in D13935EJ7V0DS, Aetrix Electronics confirms current stock carries matte tin finish per J-STD-609 Category 1, meeting RoHS Directive 2011/65/EU requirements without exemption.
What is the temperature coefficient of RD2.4ES-AZ, and how does it impact reference stability?
RD2.4ES-AZ has a negative zener voltage temperature coefficient (γZ) of approximately −3.5 mV/°C, as shown in Fig. 9 of the datasheet. This means its regulated voltage decreases by ~0.15% per °C rise - a key factor when designing precision references for wide-temperature industrial applications; compensation may be required above ±10°C deviation from 25°C.
RD2.4ES-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:
- -
RD2.4ES-AZ FAQ
1.How can I place an order for RD2.4ES-AZ through Aetrix?
Please submit a Request for Quotation (RFQ) for RD2.4ES-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 RD2.4ES-AZ reliable?
The price and inventory of RD2.4ES-AZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RD2.4ES-AZ is usually 5 days.
3.What payment methods are accepted for RD2.4ES-AZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD2.4ES-AZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD2.4ES-AZ?
RD2.4ES-AZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD2.4ES-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 RD2.4ES-AZ?
For technical support, including RD2.4ES-AZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD2.4ES-AZ requirements.
6.How does Aetrix verify that RD2.4ES-AZ is sourced from the original manufacturer or authorized distributors?
All RD2.4ES-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 RD2.4ES-AZ meets industry standards.
7.What is the process for return or replacement of RD2.4ES-AZ?
All RD2.4ES-AZ units undergo pre-shipment inspection (PSI). If there is an issue with RD2.4ES-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 RD2.4ES-AZ part is unused and in its original packaging.
Return procedure for RD2.4ES-AZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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