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Renesas RD3.0F-T7-AZ
- Part No.:
- RD3.0F-T7-AZ
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD3.0F-T7-AZ.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:4,642
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Product details
Overview
RD3.0F-T7-AZ from Renesas Electronics is a 1 W planar-type silicon Zener diode with nominal zener voltage of 3.0 V (B grade, min 2.97 V / max 3.22 V), dynamic impedance ≤15 Ω at 40 mA, and reverse current ≤100 μA at 0.5 V, designed for precision voltage regulation and surge absorption in low-voltage power rails and reference circuits.
For engineers reviewing the RD3.0F-T7-AZ datasheet, RD3.0F-T7-AZ pinout, RD3.0F-T7-AZ application, or RD3.0F-T7-AZ equivalent, this device serves as a stable 3.0 V shunt regulator in microcontroller reset circuits, analog sensor biasing, and overvoltage clamping where tight voltage tolerance and low dynamic impedance are critical.
Technical Context
This Zener diode employs a planar glass-sealed DHD (Double Heatsink Diode) structure enabling 1 W continuous power dissipation at 25°C ambient and junction temperature rating up to 175°C. Its E24-series voltage grading ensures compatibility with standard design libraries and B-grade binning provides controlled 2.97–3.22 V tolerance at 40 mA test current.
The device exhibits a negative zener voltage temperature coefficient of −2.0 mV/°C (typical), making it suitable for temperature-compensated references when paired with positive-TC components. Surge reverse power capability reaches 400 W for 10 μs pulses, supporting transient suppression in DC power inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.97–3.22 V at IZ = 40 mA - defines regulated output voltage window under standard test conditions |
| Dynamic Impedance (ZZ) | ≤15 Ω at IZ = 40 mA - ensures minimal output voltage variation under load current changes |
| Power Dissipation (P) | 1.0 W at TA = 25°C - sets maximum continuous DC power handling without heatsinking |
| Reverse Current (IR) | ≤100 μA at VR = 0.5 V - guarantees low leakage in standby or high-impedance bias networks |
| Temperature Coefficient (γZ) | −2.0 mV/°C (typ.) - enables predictable drift compensation in mixed-TC reference designs |
| Junction Temperature (Tj) | 175°C maximum - supports operation in thermally demanding industrial environments |
| Surge Reverse Power (PRSM) | 400 W (t = 10 μs) - provides robust transient immunity against ESD and inductive spikes |
Pinout & Package
RD3.0F-T7-AZ uses the JEDEC DO-41 axial-leaded glass package (3.0 mm diameter × 5.0 mm max length) with cathode indicated by a black band. The device has two terminals: anode and cathode - no internal connections or multi-pin functionality.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node in reverse-biased Zener configuration; carries forward current up to 200 mA |
| Cathode | Zener breakdown terminal | Marked with black band; connected to higher-potential node to enable reverse-bias regulation at 3.0 V |
Key Features
| Feature | Design Value |
|---|---|
| 1 W Planar Zener Structure | Enables stable regulation under sustained 1 W dissipation without thermal runaway in compact layouts |
| E24-Series Voltage Grading | Ensures interoperability with standard BOM libraries and simplifies voltage selection across 2–82 V family |
| B-Grade Voltage Bin (2.97–3.22 V) | Provides tighter tolerance than generic Zeners while maintaining cost-effective manufacturing yield |
| Negative Tempco (−2.0 mV/°C) | Allows predictable drift behavior for compensation in analog reference chains and sensor excitation |
| DO-41 Package with Black Cathode Band | Supports automated insertion and visual polarity verification in through-hole assembly |
Applications
| Microcontroller Reset Circuit | Low-Voltage Sensor Biasing |
|---|---|
Use Scenario: Provides clean, stable 3.0 V reference to reset ICs or supervisor circuits during power-up and brownout events. IC Role / Device Role / Timing Role: Shunt voltage regulator establishing precise threshold for reset assertion timing. Use Value: Ensures reliable reset activation within ±2.5% of 3.0 V across temperature, preventing premature or delayed MCU initialization. |
Use Scenario: Supplies regulated bias voltage to analog sensors (e.g., thermistors, RTDs) operating near 3 V supply rails. IC Role / Device Role / Timing Role: Precision voltage reference source delivering low-noise, low-drift excitation. Use Value: Reduces measurement error caused by supply ripple and thermal drift, improving sensor accuracy by >0.5% FS. |
| DC Power Rail Clamping | Overvoltage Protection Stage |
Use Scenario: Installed across 3.3 V logic rails to clamp transients exceeding 3.22 V before reaching sensitive digital ICs. IC Role / Device Role / Timing Role: Fast-acting shunt limiter absorbing short-duration surges without affecting steady-state operation. Use Value: Limits peak rail voltage to ≤3.22 V, protecting 3.3 V I/O pins from damage during ESD or switching noise events. |
Use Scenario: First-stage protection element in multi-tier overvoltage schemes for industrial power supplies. IC Role / Device Role / Timing Role: Primary crowbar element triggering downstream shutdown or limiting when input exceeds safe margin. Use Value: Activates at 2.97 V to initiate protective action before secondary regulators or LDOs reach unsafe dropout or thermal limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4728A (ON Semiconductor) | Same 3.3 V nominal rating (3.14–3.47 V), higher ZZ (10 Ω max), DO-41 package | Designed for general-purpose 3.3 V regulation; lacks −2.0 mV/°C tempco specification | Select when exact 3.0 V regulation is not required and higher voltage tolerance is acceptable |
| BZX55-C3V0 (Vishay) | 3.0 V nominal (2.85–3.15 V), ZZ ≤35 Ω at 20 mA, same DO-41 package | Lower test current (20 mA vs. 40 mA); less stable regulation under higher load currents | Prefer for low-power biasing where 100 μA leakage and 15 Ω ZZ are not critical |
Compared with 1N4728A and BZX55-C3V0, RD3.0F-T7-AZ delivers tighter 2.97–3.22 V tolerance at 40 mA, lower dynamic impedance (≤15 Ω), and a documented −2.0 mV/°C temperature coefficient - making it superior for precision 3.0 V reference and high-stability clamping where thermal drift control matters.
Availability
RD3.0F-T7-AZ is available at Aetrix Electronics and suitable for microcontroller reset circuits, low-voltage sensor biasing, and DC power rail clamping requiring stable component supply, long-term obsolescence management, and traceable sourcing for industrial control and embedded systems.
Supply support for RD3.0F-T7-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 specializing in microcontrollers, analog, power, and timing solutions for automotive, industrial, and consumer applications.
RD3.0F-T7-AZ belongs to the RD2.0F–RD82F planar Zener diode product line, engineered for high-reliability voltage regulation and surge suppression in standard-grade industrial and computing equipment.
FAQ
What is the exact zener voltage range for RD3.0F-T7-AZ at 40 mA test current?
The RD3.0F-T7-AZ has a guaranteed zener voltage range of 2.97 V to 3.22 V when tested at IZ = 40 mA per the Renesas D13936EJ5V0DS datasheet. This B-grade binning ensures consistent performance across production lots and supports designs requiring tighter regulation than generic 3.0 V Zeners.
Does RD3.0F-T7-AZ have a specified temperature coefficient, and what is its value?
Yes, RD3.0F-T7-AZ has a specified zener voltage temperature coefficient (γZ) of −2.0 mV/°C (typical) at 40 mA, as confirmed in the Electrical Characteristics table of the official Renesas datasheet. This enables predictable voltage drift modeling in thermal-aware reference designs.
What is the maximum surge reverse power rating for RD3.0F-T7-AZ, and under what conditions?
RD3.0F-T7-AZ supports a surge reverse power rating of 400 W for pulse width t = 10 μs at TA = 25°C, per Figure 7 in the Renesas datasheet. This rating applies to non-repetitive transients and validates its use in ESD and inductive spike suppression applications.
Is RD3.0F-T7-AZ compatible with automated through-hole assembly processes?
Yes, RD3.0F-T7-AZ uses the JEDEC-standard DO-41 axial package with 3.0 mm diameter and 5.0 mm maximum length, and features a visible black cathode band for polarity identification - fully compatible with standard wave soldering, selective soldering, and pick-and-place insertion equipment.
What quality grade is assigned to RD3.0F-T7-AZ according to Renesas documentation?
RD3.0F-T7-AZ is classified as "Standard" quality grade per Renesas documentation (Section 7 of D13936EJ5V0DS), meaning it is qualified for use in computers, office equipment, communications gear, industrial robots, and similar commercial/industrial applications - not for automotive, medical life-support, or aerospace systems.
RD3.0F-T7-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:
- -
RD3.0F-T7-AZ FAQ
1.How can I place an order for RD3.0F-T7-AZ through Aetrix?
Please submit a Request for Quotation (RFQ) for RD3.0F-T7-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 RD3.0F-T7-AZ reliable?
The price and inventory of RD3.0F-T7-AZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RD3.0F-T7-AZ is usually 5 days.
3.What payment methods are accepted for RD3.0F-T7-AZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD3.0F-T7-AZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD3.0F-T7-AZ?
RD3.0F-T7-AZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD3.0F-T7-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 RD3.0F-T7-AZ?
For technical support, including RD3.0F-T7-AZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD3.0F-T7-AZ requirements.
6.How does Aetrix verify that RD3.0F-T7-AZ is sourced from the original manufacturer or authorized distributors?
All RD3.0F-T7-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 RD3.0F-T7-AZ meets industry standards.
7.What is the process for return or replacement of RD3.0F-T7-AZ?
All RD3.0F-T7-AZ units undergo pre-shipment inspection (PSI). If there is an issue with RD3.0F-T7-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 RD3.0F-T7-AZ part is unused and in its original packaging.
Return procedure for RD3.0F-T7-AZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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