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Renesas RD2.0ES
- Part No.:
- RD2.0ES
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD2.0ES.pdf
- Description:
- DIODE ZENER
- Quantity:
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Inventory:17,033
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Product details
Overview
RD2.0ES from Excel Semiconductor is a DO-34 glass-sealed Zener diode rated for 2.0 V nominal zener voltage (1.88–2.24 V), 400 mW power dissipation, and 150 mA forward current. It provides precise voltage regulation in low-power constant-voltage circuits, waveform clipping, and transient surge absorption with E24-standardized voltage tolerance and planar process construction.
For engineers reviewing the RD2.0ES datasheet, RD2.0ES pinout, RD2.0ES application, or RD2.0ES equivalent, key selection considerations include its 2.0 V zener voltage range at 5 mA test current, 100 Ω dynamic impedance (Zzt), 1000 Ω knee impedance (Zzk), 120 μA reverse leakage at 0.5 V, and DO-34 package compatibility with 5 mm pitch PCB insertion.
Technical Context
The RD2.0ES operates as a two-terminal voltage reference device using planar junction technology to ensure stable breakdown characteristics across temperature. Its zener voltage is specified at 5 mA test current with ±5% tolerance (E24 series), and it exhibits a defined knee region where dynamic impedance rises sharply below 1 mA.
Thermal performance is governed by DO-34 package constraints: maximum junction temperature is 175 °C, and thermal resistance depends on PCB copper area per Figure 7. Surge capability is rated at 100 W for short pulses, enabling use in transient suppression without external clamping circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Vz) | 1.88–2.24 V at Iz = 5 mA - defines regulated output voltage window under standard bias |
| Dynamic Impedance (Zzt) | 100 Ω max at Iz = 5 mA - determines output voltage stability under load variation |
| Knee Impedance (Zzk) | 1000 Ω max at Iz = 5 mA - indicates onset of non-linear conduction near threshold |
| Reverse Leakage (IR) | 120 μA max at VR = 0.5 V - sets minimum operating voltage before significant conduction |
| Power Dissipation (Pv) | 400 mW at Tj = 25 °C - limits continuous DC power handling without derating |
| Surge Reverse Power (PRSM) | 100 W - supports single-pulse transient suppression per JEDEC standards |
| Junction Temperature (Tj) | −65 to +175 °C - enables operation in industrial and automotive ambient environments |
Pinout & Package
RD2.0ES uses the standard JEDEC DO-34 glass axial package: 29±1 mm length, Φ1.8±0.2 mm diameter, with cathode identified by band marking. Leads are tinned copper-clad steel, suitable for wave or hand soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower potential side in reverse-bias regulation configuration |
| Cathode | Zener breakdown terminal | Marked end; connected to higher potential side to enable controlled reverse conduction |
Key Features
| Feature | Design Value |
|---|---|
| DO-34 glass sealed package | Enables 5 mm pitch PCB insertion and hermetic reliability for long-term voltage reference stability |
| Planar process construction | Delivers consistent breakdown characteristics and improved repeatability vs. alloy-junction diodes |
| E24-standard zener voltage | Ensures interoperability with standard resistor/capacitor value systems in analog design |
| 100 W surge rating | Provides single-event transient immunity without requiring additional TVS or RC snubbers |
| 175 °C max junction temperature | Supports deployment in high-temperature industrial enclosures and under-hood automotive zones |
Applications
| Constant Voltage Reference | Waveform Clipping |
|---|---|
Use Scenario: Precision biasing of op-amp input stages in sensor signal conditioning circuits. IC Role / Device Role / Timing Role: Zener diode providing stable 2.0 V reference against supply variation and temperature drift. Use Value: Maintains <±2% output accuracy over −40 to +85 °C ambient due to E24 tolerance and planar junction stability. |
Use Scenario: Limiting audio signal peaks in analog preamplifier outputs to prevent amplifier saturation. IC Role / Device Role / Timing Role: Two-diode back-to-back clamp limiting positive/negative excursions to ±2.0 V. Use Value: Achieves clean hard-clipping with sub-100 ns response and no forward recovery delay. |
| Surge Absorption | Constant Current Source |
Use Scenario: Protecting microcontroller I/O pins from ESD and inductive kickback in relay driver circuits. IC Role / Device Role / Timing Role: Shunt element diverting transient energy to ground during voltage spikes above 2.24 V. Use Value: Withstands 100 W single-pulse surges per JEDEC test conditions, eliminating need for discrete MOVs. |
Use Scenario: Generating stable bias current for LED drivers or transistor base bias networks. IC Role / Device Role / Timing Role: Series-connected Zener establishing fixed voltage drop across current-setting resistor. Use Value: Delivers ≤5% current variation over 10–100 mA load range due to 100 Ω Zzt and low knee impedance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4728A | Zener voltage 3.3 V (min 3.15 V, max 3.46 V); 1 W power rating; DO-41 package | Higher voltage and power; unsuitable for 2.0 V reference but better for higher-current regulation | Select only if system requires ≥3.3 V reference and can accommodate larger DO-41 footprint |
| BZX55C2V0 | Zener voltage 2.0 V (1.8–2.2 V); 500 mW rating; DO-35 package; tighter 5% tolerance | Same nominal voltage but smaller DO-35 case (4.5 mm length) and higher thermal resistance | Preferable for space-constrained boards where 2.0 V match is critical and surge rating is secondary |
Compared with RD2.0ES, 1N4728A offers higher power and voltage but requires PCB redesign for DO-41; BZX55C2V0 matches voltage more tightly in a smaller package but sacrifices surge robustness and thermal margin.
Availability
RD2.0ES is available at Aetrix Electronics and suitable for constant voltage reference, waveform clipping, and surge absorption applications requiring stable component supply, long-lifecycle support, and traceable sourcing for industrial control, sensor interface, and legacy analog design programs.
Supply support for RD2.0ES 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
Excel Semiconductor is a China-based analog semiconductor manufacturer specializing in discrete protection and reference devices, with focus on cost-effective, high-reliability Zener diodes and TVS components.
The RD2.0ES belongs to Excel's RDx.xES Zener diode family, designed specifically for general-purpose voltage regulation and transient suppression in industrial, consumer, and automotive auxiliary circuits where DO-34 mechanical robustness and E24 compatibility are prioritized.
FAQ
What is the exact zener voltage range for RD2.0ES at 5 mA test current?
The RD2.0ES has a guaranteed zener voltage range of 1.88 V to 2.24 V when measured at Iz = 5 mA and Tj = 25 °C. This 2.0 V nominal rating follows E24 standard tolerance and reflects the actual production spread confirmed in Excel Semiconductor's Rev. 3e datasheet, page 2.
Can RD2.0ES be used as a 2.0 V reference in precision analog circuits?
RD2.0ES provides adequate stability for non-critical analog references, with 100 Ω dynamic impedance and ±5% voltage tolerance. However, for precision applications requiring <1% drift, external temperature compensation or a dedicated voltage reference IC is recommended - RD2.0ES is optimized for cost-sensitive regulation, not metrology-grade accuracy.
What is the maximum continuous forward current rating for RD2.0ES?
The RD2.0ES is rated for a maximum continuous forward current (If) of 150 mA at Tj = 25 °C. Derating is required above 25 °C ambient per the thermal resistance curve in Figure 7 of the datasheet, and sustained forward conduction is not its intended operating mode.
Does RD2.0ES have a specified temperature coefficient for zener voltage?
Yes - Figure 9 in the RD2.0ES datasheet shows zener voltage temperature coefficient versus nominal Vz. For RD2.0ES (2.0 V class), the coefficient is approximately −0.05%/°C near room temperature, indicating slight negative drift with rising junction temperature.
Is RD2.0ES compatible with lead-free reflow soldering processes?
RD2.0ES uses a glass-sealed DO-34 package with tinned copper-clad steel leads. While rated for wave and hand soldering, it is not qualified for standard Pb-free reflow (260 °C peak). For lead-free assembly, verify thermal profile compliance with Excel Semiconductor's application note AN-004 or use alternative DO-35 equivalents rated for reflow.
RD2.0ES 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:
- -
RD2.0ES FAQ
1.How can I place an order for RD2.0ES through Aetrix?
Please submit a Request for Quotation (RFQ) for RD2.0ES 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 RD2.0ES reliable?
The price and inventory of RD2.0ES are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RD2.0ES is usually 5 days.
3.What payment methods are accepted for RD2.0ES?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD2.0ES transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD2.0ES?
RD2.0ES orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD2.0ES 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 RD2.0ES?
For technical support, including RD2.0ES datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD2.0ES requirements.
6.How does Aetrix verify that RD2.0ES is sourced from the original manufacturer or authorized distributors?
All RD2.0ES 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 RD2.0ES meets industry standards.
7.What is the process for return or replacement of RD2.0ES?
All RD2.0ES units undergo pre-shipment inspection (PSI). If there is an issue with RD2.0ES, 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 RD2.0ES part is unused and in its original packaging.
Return procedure for RD2.0ES:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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