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Renesas RD3.0ES-AZ
- Part No.:
- RD3.0ES-AZ
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD3.0ES-AZ.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:6,600
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Product details
Overview
RD3.0ES-AZ from Excel Semiconductor is a DO-34 glass-sealed Zener diode with nominal zener voltage 3.0 V, dynamic impedance ≤120 Ω at 5 mA, and maximum power dissipation of 400 mW. It operates within -65 °C to +175 °C junction temperature range and serves as a precision voltage reference in low-power regulation and waveform clipping circuits.
For engineers reviewing the RD3.0ES-AZ datasheet, RD3.0ES-AZ pinout, RD3.0ES-AZ application, or RD3.0ES-AZ equivalent, key selection criteria include its 3.0 V ±5% tolerance (E24 standard), 50 μA reverse current at 1.0 V, surge reverse power rating of 100 W, and DO-34 package compatibility with 5 mm pitch PCB insertion.
Technical Context
This Zener diode uses planar process technology to ensure stable breakdown characteristics and tight voltage tolerance across production lots. Its E24-standardized zener voltage (2.99–3.24 V) and specified knee impedance (≤1000 Ω at 0.5 mA) support reliable operation in low-current biasing and signal-level clamping.
The device is rated for 175 °C maximum junction temperature and exhibits a defined thermal resistance profile dependent on PCB copper area. Its surge reverse power capability (100 W) enables transient overvoltage suppression without degradation under short-duration pulses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.99–3.24 V at IZ = 5 mA - defines stable regulation point for low-voltage reference circuits |
| Dynamic Impedance (Zzt) | ≤120 Ω at IZ = 5 mA - ensures minimal output voltage variation under load changes |
| Knee Dynamic Impedance (Zzk) | ≤1000 Ω at IZ = 0.5 mA - supports usable regulation even near turn-on threshold |
| Reverse Current (IR) | ≤50 μA at VR = 1.0 V - guarantees low leakage in standby or high-impedance sensing nodes |
| Power Dissipation (PV) | 400 mW at Tj = 25 °C - sets continuous DC power limit for thermal design |
| Surge Reverse Power (PRSM) | 100 W - enables single-pulse transient suppression per JEDEC standards |
| Junction Temperature (Tj) | -65 °C to +175 °C - supports operation in automotive under-hood and industrial control environments |
Pinout & Package
RD3.0ES-AZ is housed in a DO-34 glass-sealed axial package with cathode identified by a band. The device has two terminals: anode and cathode. No internal circuitry or multi-pin configuration applies.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower potential side in reverse-biased Zener operation; carries forward current up to 150 mA |
| Cathode | Zener breakdown terminal | Marked with band; connected to higher potential side during regulation; defines polarity for voltage reference orientation |
Key Features
| Feature | Design Value |
|---|---|
| DO-34 glass package | Enables manual or automated through-hole insertion with 5 mm pitch; provides hermetic seal for long-term stability |
| Planar process construction | Delivers consistent breakdown voltage distribution and improved reliability versus diffused-junction alternatives |
| E24-standard zener voltage | Ensures interchangeability within standardized resistor/diode value series for BOM rationalization |
| 100 W surge reverse power rating | Allows absorption of short-duration transients without derating or external protection components |
| 175 °C max junction temperature | Supports use in thermally demanding environments without thermal shutdown or parameter drift |
Applications
| Low-Voltage Reference | Signal-Level Clipping |
|---|---|
Use Scenario: Providing stable 3.0 V bias for op-amp input stages or ADC reference dividers in battery-powered sensors. IC Role / Device Role / Timing Role: Precision voltage reference element establishing known DC offset or scaling point. Use Value: Tight 2.99–3.24 V tolerance and low Zzt minimize error propagation in analog signal chains. |
Use Scenario: Limiting audio or sensor signal peaks to prevent amplifier saturation or ADC overrange. IC Role / Device Role / Timing Role: Bidirectional voltage clamp using forward and reverse conduction paths. Use Value: Low knee impedance (≤1000 Ω at 0.5 mA) ensures sharp clipping onset at ~3.0 V with minimal distortion. |
| Surge Protection Node | Constant-Current Bias Source |
Use Scenario: Protecting microcontroller I/O pins from ESD or inductive kickback in industrial control interfaces. IC Role / Device Role / Timing Role: Transient voltage suppressor absorbing energy via controlled avalanche breakdown. Use Value: 100 W surge rating allows handling of 8/20 μs pulses without degradation when properly heatsinked. |
Use Scenario: Generating stable bias current for LED drivers or transistor amplifiers in discrete power stages. IC Role / Device Role / Timing Role: Current-regulating element in series with a limiting resistor. Use Value: Predictable VZ and low Zzt enable accurate current setting (e.g., IOUT ≈ (VCC−3.0)/R). |
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 (3.14–3.47 V), Zzt ≤15 Ω at 76 mA, DO-41 package | Higher test current and tighter Zzt, but larger DO-41 footprint and different thermal profile | Prefer when lower dynamic impedance is critical and board space permits larger package |
| BZX55C3V0 | Zener voltage 3.0 V (2.85–3.15 V), Zzt ≤95 Ω at 5 mA, DO-35 package | Similar voltage spec but smaller DO-35 glass case; lower PV (500 mW) and no published PRSM | Choose where compact size is prioritized and surge immunity is not required |
Compared with RD3.0ES-AZ, 1N4728A offers lower impedance at higher current but requires layout adaptation, while BZX55C3V0 matches voltage more tightly in a smaller package yet lacks documented surge capability-making RD3.0ES-AZ optimal for ruggedized 3.0 V reference or clamping where DO-34 mechanical robustness matters.
Availability
RD3.0ES-AZ is available at Aetrix Electronics and suitable for low-voltage reference, signal clipping, and surge protection applications requiring stable component supply across automotive, industrial control, and sensor interface designs.
Supply support for RD3.0ES-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
Excel Semiconductor is a China-based semiconductor manufacturer specializing in discrete devices including Zener diodes, rectifiers, and TVS components for industrial and consumer applications.
The RD2.0ES–RD39ES series was designed to deliver E24-standardized, glass-sealed Zener diodes with high surge tolerance and wide temperature operation for cost-sensitive, reliability-critical analog functions.
FAQ
What is the exact zener voltage range for RD3.0ES-AZ?
The RD3.0ES-AZ has a guaranteed zener voltage range of 2.99 V to 3.24 V when tested at IZ = 5 mA and Tj = 25 °C. This 3.0 V nominal rating follows E24 standard tolerance and is verified per the manufacturer's Rev. 3e datasheet. The RD3.0ES-AZ maintains this specification across its qualified operating temperature range.
Is RD3.0ES-AZ compatible with automated through-hole assembly?
Yes, RD3.0ES-AZ uses the JEDEC DO-34 package with 29 mm body length and 1.8 mm diameter, designed for standard axial lead insertion equipment. Its 5 mm pitch recommendation aligns with common wave soldering and selective soldering tooling. The RD3.0ES-AZ glass body withstands typical preheat and solder profiles without cracking.
Does RD3.0ES-AZ have a specified temperature coefficient?
The RD3.0ES-AZ datasheet does not list a numeric temperature coefficient (TC) value for its zener voltage. Figure 9 in the datasheet shows TC vs. VZ curves for the full RD2.0ES–RD39ES family, indicating that devices below ~5 V-including RD3.0ES-AZ-typically exhibit negative TC behavior, but no part-specific TC is published. RD3.0ES-AZ should be used where ambient temperature variation is limited or compensated externally.
What is the maximum forward current rating for RD3.0ES-AZ?
The RD3.0ES-AZ is rated for a maximum forward current (IF) of 150 mA at Tj = 25 °C. This rating applies to continuous DC conduction in forward bias and must be derated linearly above 25 °C per the thermal resistance curve in Figure 7. Exceeding this limit risks metallization failure or bond wire damage. RD3.0ES-AZ is primarily intended for reverse-bias regulation, not forward rectification.
Can RD3.0ES-AZ replace a 3.3 V Zener diode in a voltage reference circuit?
No-RD3.0ES-AZ is specified for 2.99–3.24 V, not 3.3 V. Substituting it for a 3.3 V part (e.g., RD3.3ES or 1N4728A) will shift the reference downward by ~0.1–0.3 V, potentially violating system accuracy requirements. The RD3.0ES-AZ must be selected only where 3.0 V nominal regulation is explicitly required and validated in the target circuit.
RD3.0ES-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:
- -
RD3.0ES-AZ FAQ
1.How can I place an order for RD3.0ES-AZ through Aetrix?
Please submit a Request for Quotation (RFQ) for RD3.0ES-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 RD3.0ES-AZ reliable?
The price and inventory of RD3.0ES-AZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RD3.0ES-AZ is usually 5 days.
3.What payment methods are accepted for RD3.0ES-AZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD3.0ES-AZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD3.0ES-AZ?
RD3.0ES-AZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD3.0ES-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 RD3.0ES-AZ?
For technical support, including RD3.0ES-AZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD3.0ES-AZ requirements.
6.How does Aetrix verify that RD3.0ES-AZ is sourced from the original manufacturer or authorized distributors?
All RD3.0ES-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 RD3.0ES-AZ meets industry standards.
7.What is the process for return or replacement of RD3.0ES-AZ?
All RD3.0ES-AZ units undergo pre-shipment inspection (PSI). If there is an issue with RD3.0ES-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 RD3.0ES-AZ part is unused and in its original packaging.
Return procedure for RD3.0ES-AZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD3.0ES-AZ Tags
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