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Renesas RD11F-T8-AZ
- Part No.:
- RD11F-T8-AZ
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD11F-T8-AZ.pdf
- Description:
- DIODE ZENER
- Quantity:
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Inventory:5,000
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Product details
Overview
RD11F-T8-AZ from Renesas Electronics is a 1 W planar-type silicon Zener diode with a nominal zener voltage of 11 V (B3 grade: 10.87–11.43 V), dynamic impedance of 8 Ω at 20 mA, and temperature coefficient of +7.5 mV/°C. It features DO-41 glass-sealed DHD (Double Heatsink Diode) packaging and is rated for surge reverse power up to 400 W (t = 10 μs), making it suitable for precision voltage regulation and transient suppression in industrial power supplies.
For engineers reviewing the RD11F-T8-AZ datasheet, RD11F-T8-AZ pinout, RD11F-T8-AZ application, or RD11F-T8-AZ equivalent, key selection criteria include its ±5% zener voltage tolerance (B3 grade), low dynamic impedance for stable regulation under load variation, negative-to-positive transition in temperature coefficient near 10 V, and JEDEC DO-41 mechanical compatibility for through-hole PCB assembly.
Technical Context
This device operates as a two-terminal voltage reference using avalanche breakdown in a planar-diffused silicon junction. Its zener voltage is specified at IZ = 20 mA, with reverse current limited to ≤10 μA at VR = 8.0 V - confirming sharp knee behavior ideal for clamping and reference functions.
The DO-41 package provides thermal resistance of ~150°C/W (transient, t = 10 ms), enabling reliable 1 W continuous dissipation at TA ≤ 50°C with adequate PCB copper area. Its surge rating of 400 W at 10 μs supports protection against ESD and inductive switching transients without derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 10.87–11.43 V at IZ = 20 mA (B3 grade); ensures tight regulation tolerance for feedback loops. |
| Dynamic Impedance (ZZ) | 8 Ω max at IZ = 20 mA; minimizes output voltage shift under varying load current. |
| Temperature Coefficient (γZ) | +7.5 mV/°C typical; positive drift improves stability in warm environments vs. lower-voltage Zeners. |
| Power Dissipation (P) | 1.0 W at TA = 25°C; requires thermal design for >50°C ambient operation. |
| Surge Reverse Power (PRSM) | 400 W at t = 10 μs; handles short-duration transients without failure. |
| Reverse Current (IR) | ≤10 μA at VR = 8.0 V; guarantees low leakage in high-impedance bias networks. |
| Junction Temperature (Tj) | 175°C max; defines absolute thermal limit for reliability margining. |
Pinout & Package
RD11F-T8-AZ uses a standard DO-41 axial-leaded glass package per JEDEC. Cathode is marked with a black band; leads are tinned copper-clad steel. Package dimensions: Ø3.0 mm max body diameter, 25 mm min lead length, 5 mm max overall length.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node in reverse-biased regulation configuration. |
| Cathode | Zener breakdown terminal | Marked with black band; connected to higher-potential node for voltage reference or clamping. |
Key Features
| Feature | Design Value |
|---|---|
| E24-series voltage grading | Enables standardized BOM selection across 2–82 V range without custom binning. |
| B3-grade voltage tolerance | ±2.5% (10.87–11.43 V) ensures predictable performance in feedback divider networks. |
| Planar DHD structure | Double heatsink geometry improves thermal transfer from junction to leads, supporting 1 W continuous operation. |
| Low IR at 8 V | ≤10 μA leakage below breakdown enables use in high-Z sample-and-hold or timing circuits. |
| Positive γZ above 10 V | +7.5 mV/°C compensates for negative tempcos in associated circuitry (e.g., op-amps). |
Applications
| Voltage Reference Circuit | Transient Protection Circuit |
|---|---|
Use Scenario: Providing stable 11 V reference for ADC voltage dividers or op-amp biasing in industrial sensor signal conditioning. IC Role / Device Role / Timing Role: Two-terminal shunt reference maintaining fixed potential despite input ripple or load variation. Use Value: 8 Ω dynamic impedance limits output deviation to <±80 mV over ±10 mA load change, ensuring <0.1% reference error. | Use Scenario: Clamping inductive kickback from relay coils or motor drivers in PLC I/O modules. IC Role / Device Role / Timing Role: Fast-acting voltage limiter diverting surge energy to ground before IC damage occurs. Use Value: 400 W surge rating at 10 μs absorbs 4 mJ pulses, exceeding IEC 61000-4-5 Level 3 requirements. |
| Waveform Clipping Circuit | Constant-Current Bias Circuit |
Use Scenario: Symmetrical clipping of audio signals in analog mixer front-ends to prevent amplifier saturation. IC Role / Device Role / Timing Role: Bidirectional clamp (with series diode) limiting peak amplitude to ±11 V. Use Value: Sharp breakdown knee at 20 mA enables clean clipping onset without soft saturation region distortion. | Use Scenario: Setting precise bias current for LED drivers or phototransistor amplifiers in optical encoders. IC Role / Device Role / Timing Role: Shunt regulator establishing fixed voltage across current-setting resistor. Use Value: +7.5 mV/°C tempco counterbalances LED forward-voltage drift, stabilizing current within ±2% over −25°C to +85°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4740A | 10 V nominal, ±5% tolerance, ZZ = 9 Ω, DO-41, same PD = 1 W | Slightly lower reference voltage; γZ = +5.2 mV/°C | Select when 10 V reference suffices and tighter tempco matching is not required. |
| BZX85C11 | 11 V nominal, ±5% tolerance, ZZ = 15 Ω, DO-41, PD = 1.3 W | Higher dynamic impedance reduces regulation accuracy; wider power rating allows minor overloads. | Choose for cost-sensitive designs where 15 Ω ZZ is acceptable and 1.3 W headroom is beneficial. |
Compared with 1N4740A and BZX85C11, RD11F-T8-AZ offers superior regulation stability (8 Ω ZZ) and a higher, more predictable temperature coefficient (+7.5 mV/°C), making it preferred for precision reference and temperature-compensated biasing where voltage drift must be actively managed.
Availability
RD11F-T8-AZ is available at Aetrix Electronics and suitable for industrial power supplies, sensor interface modules, and programmable logic controller (PLC) I/O protection requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for RD11F-T8-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 specializing in microcontrollers, analog, and power devices for industrial, automotive, and infrastructure markets.
RD11F-T8-AZ belongs to the RD2.0F–RD82F planar Zener diode family designed for general-purpose voltage regulation, waveform shaping, and transient suppression in Standard-grade applications including office equipment, test instruments, and industrial controls.
FAQ
What is the exact zener voltage tolerance for RD11F-T8-AZ?
The RD11F-T8-AZ is specified as B3 grade, with a zener voltage range of 10.87 V to 11.43 V at IZ = 20 mA. This corresponds to a ±2.5% tolerance about the nominal 11 V value, confirmed in Renesas data sheet D13936EJ5V0DS, page 3. The B3 classification ensures tighter distribution than standard B-grade parts, critical for repeatable reference design.
Does RD11F-T8-AZ have a positive or negative temperature coefficient?
RD11F-T8-AZ has a positive temperature coefficient of +7.5 mV/°C (typical), as documented in the Electrical Characteristics table on page 3 of Renesas data sheet D13936EJ5V0DS. This positive drift helps offset the negative tempcos of associated components like bipolar transistors or LEDs, improving overall system thermal stability.
What is the maximum surge reverse power rating for RD11F-T8-AZ?
RD11F-T8-AZ is rated for 400 W surge reverse power at a pulse width of 10 μs, per Absolute Maximum Ratings table (page 1) and Figure 7 in Renesas data sheet D13936EJ5V0DS. This rating applies to non-repetitive events and assumes TA = 25°C; derating is required for repeated surges or elevated ambient temperatures.
Is RD11F-T8-AZ compatible with standard DO-41 footprint layouts?
Yes, RD11F-T8-AZ uses the JEDEC-standard DO-41 package with 3.0 mm maximum body diameter and axial leads. Its mechanical dimensions match industry-standard DO-41 footprints, enabling drop-in replacement in existing through-hole designs without PCB modification, as shown in the Package Drawing on page 1 of Renesas data sheet D13936EJ5V0DS.
What quality grade is assigned to RD11F-T8-AZ per Renesas documentation?
RD11F-T8-AZ is classified as "Standard" quality grade per Renesas Electronics' product grading policy (Notice section 7, page 1). This designation permits use in computers, office equipment, communications gear, test instruments, audio/video systems, home appliances, machine tools, personal electronics, and industrial robots - but excludes life-critical, aerospace, or nuclear applications without explicit written consent.
RD11F-T8-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:
- -
RD11F-T8-AZ FAQ
1.How can I place an order for RD11F-T8-AZ through Aetrix?
Please submit a Request for Quotation (RFQ) for RD11F-T8-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 RD11F-T8-AZ reliable?
The price and inventory of RD11F-T8-AZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RD11F-T8-AZ is usually 5 days.
3.What payment methods are accepted for RD11F-T8-AZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD11F-T8-AZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD11F-T8-AZ?
RD11F-T8-AZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD11F-T8-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 RD11F-T8-AZ?
For technical support, including RD11F-T8-AZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD11F-T8-AZ requirements.
6.How does Aetrix verify that RD11F-T8-AZ is sourced from the original manufacturer or authorized distributors?
All RD11F-T8-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 RD11F-T8-AZ meets industry standards.
7.What is the process for return or replacement of RD11F-T8-AZ?
All RD11F-T8-AZ units undergo pre-shipment inspection (PSI). If there is an issue with RD11F-T8-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 RD11F-T8-AZ part is unused and in its original packaging.
Return procedure for RD11F-T8-AZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD11F-T8-AZ Tags
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