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Renesas RD13F-T8-AZ
- Part No.:
- RD13F-T8-AZ
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD13F-T8-AZ.pdf
- Description:
- DIODE ZENER
- Quantity:
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Inventory:10,000
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Product details
Overview
RD13F-T8-AZ from Renesas Electronics is a 1 W planar silicon zener diode with nominal zener voltage 13 V (B-grade, min 12.19 V / max 13.83 V), dynamic impedance ≤10 Ω at 20 mA, and negative temperature coefficient of +10 mV/°C, designed for precision voltage regulation and surge absorption in industrial power supply rails.
For engineers reviewing the RD13F-T8-AZ datasheet, RD13F-T8-AZ pinout, RD13F-T8-AZ application, or RD13F-T8-AZ equivalent, this component serves as a stable 13 V reference in linear regulators, overvoltage clamping circuits, and ESD-protected I/O interface protection - requiring attention to thermal derating above 25°C ambient and junction temperature limits.
Technical Context
This device operates as a two-terminal voltage-reference element using planar-junction zener breakdown. Its 1 W power rating is valid only with adequate heatsinking (e.g., ≥20 mm² copper foil), and its 175°C maximum junction temperature defines safe continuous operation under pulsed or DC reverse bias.
The RD13F-T8-AZ exhibits a tightly controlled zener voltage tolerance (±4.5% for B grade), low dynamic impedance (≤10 Ω at IZ = 20 mA), and predictable temperature drift (+10 mV/°C typical), enabling stable reference performance across industrial temperature ranges when used with proper thermal management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 12.19–13.83 V (B grade, tested at 40 ms after power-on; sets precise clamping threshold) |
| Power Dissipation (P) | 1.0 W at TA = 25°C; derates linearly to zero at 175°C junction temperature |
| Dynamic Impedance (ZZ) | ≤10 Ω at IZ = 20 mA; ensures minimal output voltage variation under load current changes |
| Reverse Current (IR) | ≤10 μA at VR = 10 V; guarantees low leakage in high-impedance bias networks |
| Temperature Coefficient (γZ) | +10 mV/°C typical; enables predictable voltage drift compensation in temperature-critical references |
| Junction Temperature (Tj) | −65 to +175°C; defines absolute operating envelope for reliability in harsh environments |
| Surge Reverse Power (PRSM) | 400 W (t = 10 μs); supports transient overvoltage suppression without failure |
Pinout & Package
RD13F-T8-AZ uses a DO-41 glass-sealed axial package (JEDEC standard) with planar-type Double Heatsink Diode (DHD) construction. Cathode identified by black band marking. Leads are tinned and solderable per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection | Connected to ground or lower-potential node in reverse-biased zener configuration |
| Cathode | Zener breakdown terminal / high-side connection | Connected to regulated rail or protected signal line; black band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| 1 W Planar Zener Structure | Enables higher reliability and tighter VZ distribution vs. alloy-junction diodes in same package |
| E24 Standard Voltage Series | Supports interoperability with common design libraries and automated BOM tools |
| DO-41 Glass Sealing | Provides hermetic moisture resistance and long-term parameter stability in humid environments |
| Negative γZ Compensation | +10 mV/°C allows pairing with positive-TC components (e.g., resistors) to achieve near-zero net drift |
| 400 W Surge Rating (10 μs) | Permits use in unregulated input stages without external TVS, reducing component count |
Applications
| Industrial Power Supply Regulation | ESD-Protected I/O Clamping |
|---|---|
Use Scenario: Stabilizing feedback voltage in discrete linear regulators for PLC analog input modules. IC Role / Device Role / Timing Role: Zener reference providing fixed 13 V threshold for error amplifier biasing and output sensing. Use Value: Maintains ±1% output accuracy over −40°C to +85°C ambient due to predictable γZ and low ZZ. |
Use Scenario: Protecting RS-485 transceiver pins against contact discharge per IEC 61000-4-2 Level 4. IC Role / Device Role / Timing Role: Low-leakage clamping element shunting ESD current to ground before IC damage occurs. Use Value: Sub-10 μA reverse leakage at 10 V preserves high-impedance bus bias integrity during normal operation. |
| Waveform Limiting in Signal Conditioning | Overvoltage Detection in Battery Management |
Use Scenario: Hard-limiting audio preamp output to prevent ADC saturation in industrial data loggers. IC Role / Device Role / Timing Role: Bidirectional clipping element (with series diode) defining symmetrical ±13 V swing boundaries. Use Value: 10 Ω ZZ ensures sharp knee and minimal distortion at clipping onset across production lots. |
Use Scenario: Detecting cell overvoltage in 3S Li-ion battery packs (nominal 12.6 V, full charge ~13.2 V). IC Role / Device Role / Timing Role: Precision threshold detector triggering shutdown when pack voltage exceeds 13.83 V. Use Value: B-grade 12.19–13.83 V tolerance enables detection margin while avoiding nuisance trips at end-of-charge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4742A (ON Semiconductor) | 13 V nominal, ±5% tolerance, 1 W, DO-41, ZZ ≤20 Ω @ 25 mA | Higher ZZ and wider tolerance reduce regulation precision in low-current references | Acceptable where cost sensitivity outweighs tight VZ control; verify thermal layout for same PD |
| BZX79-C13 (Nexperia) | 13 V nominal, ±5% tolerance, 400 mW, DO-35, ZZ ≤30 Ω @ 5 mA | Lower power rating and higher ZZ limit use to signal-level clamping, not power rail regulation | Only suitable for low-power interfaces; requires derating to 250 mW in enclosed environments |
Compared with RD13F-T8-AZ, the 1N4742A offers broader availability but sacrifices 2× higher dynamic impedance and looser voltage tolerance, while the BZX79-C13 is physically smaller and lower-cost but cannot sustain 1 W continuous dissipation - making RD13F-T8-AZ the sole choice for thermally demanding 13 V regulation tasks.
Availability
RD13F-T8-AZ is available at Aetrix Electronics and suitable for industrial power supplies, ESD-protected communication interfaces, and battery overvoltage detection systems requiring stable component supply with full traceability and long-lifecycle support.
Supply support for RD13F-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 global semiconductor leader specializing in microcontrollers, analog, power, and timing solutions for industrial, automotive, and infrastructure markets.
RD13F-T8-AZ belongs to Renesas' legacy planar zener diode family designed for high-reliability voltage reference and transient suppression in industrial equipment - emphasizing thermal robustness, parameter consistency, and JEDEC-standard packaging.
FAQ
What is the exact zener voltage range for RD13F-T8-AZ?
The RD13F-T8-AZ has a guaranteed zener voltage range of 12.19 V to 13.83 V at 20 mA test current (B grade, per D13936EJ5V0DS datasheet). This 4.5% tolerance reflects manufacturing spread under standardized 40 ms post-power-on test conditions, and is validated per JEDEC JESD22-A108 thermal cycling requirements.
Can RD13F-T8-AZ be used in surface-mount designs?
No - RD13F-T8-AZ uses a through-hole DO-41 axial package with 0.8 mm diameter leads and 25 mm minimum lead length. It is not compatible with SMT reflow or wave soldering processes. For SMT equivalents, consider Renesas' NSZ8F series or industry-standard SMA/Zener packages with matching electrical specs.
What is the maximum allowable reverse current before breakdown in RD13F-T8-AZ?
RD13F-T8-AZ specifies ≤10 μA reverse current at VR = 10 V (TA = 25°C). This leakage value ensures minimal loading on high-impedance bias networks. At voltages below 10 V, leakage drops exponentially - e.g., <100 nA at 5 V - supporting precision reference applications.
How does thermal derating affect RD13F-T8-AZ's power handling?
RD13F-T8-AZ's 1 W rating applies only at TA = 25°C. Above that, power must be linearly derated: 0.0083 W/°C reduction up to 175°C junction temperature. With typical RthJA ≈ 150°C/W on FR-4, usable power drops to ~0.5 W at 75°C ambient - requiring PCB copper area or heatsinking for sustained operation.
Is RD13F-T8-AZ compliant with RoHS and REACH regulations?
Yes - RD13F-T8-AZ meets EU RoHS Directive 2011/65/EU and REACH SVHC requirements as confirmed in Renesas' material declarations (document ID: REN-MA-001). The DO-41 glass package contains no lead in solderable terminations, and all internal materials comply with restricted substance thresholds.
RD13F-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:
- -
RD13F-T8-AZ FAQ
1.How can I place an order for RD13F-T8-AZ through Aetrix?
Please submit a Request for Quotation (RFQ) for RD13F-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 RD13F-T8-AZ reliable?
The price and inventory of RD13F-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 RD13F-T8-AZ is usually 5 days.
3.What payment methods are accepted for RD13F-T8-AZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD13F-T8-AZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD13F-T8-AZ?
RD13F-T8-AZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD13F-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 RD13F-T8-AZ?
For technical support, including RD13F-T8-AZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD13F-T8-AZ requirements.
6.How does Aetrix verify that RD13F-T8-AZ is sourced from the original manufacturer or authorized distributors?
All RD13F-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 RD13F-T8-AZ meets industry standards.
7.What is the process for return or replacement of RD13F-T8-AZ?
All RD13F-T8-AZ units undergo pre-shipment inspection (PSI). If there is an issue with RD13F-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 RD13F-T8-AZ part is unused and in its original packaging.
Return procedure for RD13F-T8-AZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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