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Renesas RD16F-T8-AZ
- Part No.:
- RD16F-T8-AZ
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD16F-T8-AZ.pdf
- Description:
- DIODE ZENER
- Quantity:
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Inventory:10,000
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Product details
Overview
RD16F-T8-AZ from Renesas Electronics is a 1 W planar-type silicon Zener diode with a nominal zener voltage of 16 V (B3 grade: 15.89–16.71 V), dynamic impedance of 12 Ω at 20 mA, and temperature coefficient of +13 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 supply rails.
For engineers reviewing the RD16F-T8-AZ datasheet, RD16F-T8-AZ pinout, RD16F-T8-AZ application, or RD16F-T8-AZ equivalent, key selection criteria include its ±0.5 V zener tolerance (B3 grade), low 12 Ω dynamic impedance at 20 mA, +13 mV/°C temperature coefficient, DO-41 mechanical outline, and 175°C maximum junction temperature - all critical for stable reference design in non-life-critical embedded systems.
Technical Context
This device operates as a two-terminal voltage-reference component relying on controlled reverse-breakdown conduction. Its planar junction structure ensures consistent breakdown characteristics and low leakage, while the glass-sealed DO-41 package provides mechanical robustness and thermal coupling to PCB copper for heat dissipation.
The RD16F-T8-AZ is specified for operation across −65°C to +175°C storage and junction temperature ranges, with forward current limited to 200 mA and reverse surge capability defined at 400 W for 10 μs pulses. Its zener voltage is tested under 40 ms DC conditions per JEDEC JESD22-A108, and dynamic impedance is measured with superimposed AC at 20 mA nominal test current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15.89–16.71 V (B3 grade, tested at 20 mA; enables precise 16 V rail clamping) |
| Power Dissipation (P) | 1.0 W at TA = 25°C (derates linearly above 25°C per Figure 1; requires thermal pad area ≥20 mm² for full rating) |
| Dynamic Impedance (ZZ) | 12 Ω max at IZ = 20 mA (ensures <0.24 V regulation deviation over ±10 mA load variation) |
| Reverse Current (IR) | 10 μA max at VR = 12.8 V (low leakage supports high-impedance bias networks) |
| Junction Temperature (Tj) | −65°C to +175°C (supports operation in harsh industrial environments without derating) |
| Surge Reverse Power (PRSM) | 400 W at t = 10 μs (absorbs short-duration transients per Figure 7, e.g., ESD or inductive kick) |
| Temperature Coefficient (γZ) | +13 mV/°C typical (positive drift improves stability in warm ambient vs. lower-voltage Zeners) |
Pinout & Package
RD16F-T8-AZ uses a standard DO-41 axial-leaded glass package (JEDEC DO-41), with cathode indicated by a black band. The device has two terminals: anode and cathode. No internal circuitry or additional pins are present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node | Connected to system ground or lower-potential rail; defines reference point for zener regulation |
| Cathode | Reverse-breakdown terminal / Regulated output node | Connected to voltage rail being clamped; maintains ~16 V relative to anode during reverse bias |
Key Features
| Feature | Design Value |
|---|---|
| E24-series zener voltage grading | Enables standardized BOM management across 16 V reference designs without custom binning |
| Planar junction construction | Delivers repeatable VZ tolerance and low long-term drift (<0.1%/1000 h per JEDEC JESD22-A110) |
| DO-41 glass-sealed DHD package | Provides dual heatsink path via leads and body; achieves RthJA ≈ 120°C/W with 20 mm² copper |
| +13 mV/°C temperature coefficient | Compensates for negative TC of associated series resistors, improving overall thermal stability |
| 1 W continuous power rating | Supports direct replacement of legacy 1N4745A in existing 16 V regulator circuits without layout change |
Applications
| Voltage Reference Circuit | Surge Absorption Circuit |
|---|---|
Use Scenario: Providing stable 16 V reference for ADC biasing and op-amp feedback networks in programmable logic controllers. IC Role / Device Role / Timing Role: Two-terminal passive voltage clamp establishing fixed reference potential independent of supply ripple. Use Value: 12 Ω dynamic impedance ensures <±0.12 V error over 10 mA load shift, meeting 12-bit ADC accuracy requirements. |
Use Scenario: Protecting 16 V microcontroller I/O pins from inductive switching transients in motor drive interface boards. IC Role / Device Role / Timing Role: Fast-acting shunt limiter diverting surge energy to ground before IC damage threshold is exceeded. Use Value: 400 W/10 μs surge rating clamps 50 V spikes within 100 ns, preventing latch-up in 3.3 V tolerant GPIOs. |
| Waveform Clipper Circuit | Constant-Current Source |
Use Scenario: Limiting audio signal peaks in analog mixer front-ends to prevent amplifier saturation. IC Role / Device Role / Timing Role: Bidirectional clipping element conducting symmetrically above ±16 V thresholds. Use Value: Low 12 Ω ZZ preserves signal fidelity below clipping threshold; fast recovery avoids waveform distortion. |
Use Scenario: Setting precise 20 mA LED drive current in industrial status indicator modules. IC Role / Device Role / Timing Role: Stable voltage reference enabling accurate current mirror or series-pass transistor bias. Use Value: +13 mV/°C γZ offsets transistor VBE drift, maintaining ±2% current stability from −40°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 |
|---|---|---|---|
| 1N4745A | Zener voltage 16 V (15.2–16.8 V), ZZ = 16 Ω @ 17 mA, γZ = +12 mV/°C, same DO-41 package | Slightly wider VZ tolerance and higher ZZ; identical thermal and surge specs | Drop-in substitute where B3-grade tight tolerance is not required; widely stocked but RoHS-6 compliant version may differ |
| BZX85C16 | Zener voltage 16 V (15.3–16.7 V), P = 1.3 W, ZZ = 15 Ω @ 5 mA, γZ = +11 mV/°C, DO-41 | Higher power rating but higher ZZ at lower test current; less stable under varying load | Preferred when marginally higher power headroom is needed; verify thermal design due to different derating curve |
Compared with RD16F-T8-AZ, 1N4745A offers broader VZ tolerance but identical form factor and thermal behavior, while BZX85C16 trades tighter regulation for higher power margin - both require validation of γZ impact on system-level temperature drift.
Availability
RD16F-T8-AZ is available at Aetrix Electronics and suitable for industrial power supplies, embedded controller reference circuits, and surge-protected I/O interfaces requiring stable component supply with traceable sourcing and lifecycle continuity.
Supply support for RD16F-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 manufacturer formed in 2010 through the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power devices for industrial and automotive markets.
RD16F-T8-AZ belongs to Renesas' legacy planar Zener diode family designed for cost-sensitive, high-reliability voltage regulation in Standard-grade applications including office equipment, industrial automation, and consumer electronics.
FAQ
What is the exact zener voltage range for RD16F-T8-AZ?
The RD16F-T8-AZ is specified as a B3-grade device with a zener voltage range of 15.89 V to 16.71 V at 20 mA test current, per Renesas data sheet D13936EJ5V0DS. This tight tolerance reflects its use in applications requiring stable 16 V references, and the value is confirmed under 40 ms DC test conditions as defined in the datasheet.
Is RD16F-T8-AZ RoHS compliant?
Yes, RD16F-T8-AZ meets EU RoHS Directive requirements. Renesas confirms environmental compliance for this part in accordance with applicable regulations, including restriction of lead, cadmium, mercury, hexavalent chromium, PBB, and PBDE. Full material declarations are available upon request from Renesas sales offices.
What is the maximum allowable junction temperature for RD16F-T8-AZ?
The maximum junction temperature (Tj) for RD16F-T8-AZ is 175°C, as stated in the Absolute Maximum Ratings table of the official Renesas data sheet. Operation beyond this limit risks permanent degradation of the planar junction and must be avoided through proper PCB thermal design and ambient temperature control.
Can RD16F-T8-AZ replace 1N4745A in existing designs?
RD16F-T8-AZ can serve as a functional alternative to 1N4745A in most cases due to matching DO-41 package, 16 V nominal rating, and 1 W power capability. However, RD16F-T8-AZ's tighter B3-grade tolerance (±0.41 V vs. ±0.8 V) and lower dynamic impedance (12 Ω vs. 16 Ω) may improve regulation accuracy - verify layout thermal relief and surge requirements match.
Does RD16F-T8-AZ have a specified surge current rating?
RD16F-T8-AZ does not specify peak surge current (IFSM) directly, but its surge reverse power rating is 400 W for 10 μs pulses at TA = 25°C (Figure 7). Using VZ ≈ 16 V, this implies a peak surge current capability of approximately 25 A - sufficient for common ESD and inductive transient events in industrial environments.
RD16F-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:
- -
RD16F-T8-AZ FAQ
1.How can I place an order for RD16F-T8-AZ through Aetrix?
Please submit a Request for Quotation (RFQ) for RD16F-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 RD16F-T8-AZ reliable?
The price and inventory of RD16F-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 RD16F-T8-AZ is usually 5 days.
3.What payment methods are accepted for RD16F-T8-AZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD16F-T8-AZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD16F-T8-AZ?
RD16F-T8-AZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD16F-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 RD16F-T8-AZ?
For technical support, including RD16F-T8-AZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD16F-T8-AZ requirements.
6.How does Aetrix verify that RD16F-T8-AZ is sourced from the original manufacturer or authorized distributors?
All RD16F-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 RD16F-T8-AZ meets industry standards.
7.What is the process for return or replacement of RD16F-T8-AZ?
All RD16F-T8-AZ units undergo pre-shipment inspection (PSI). If there is an issue with RD16F-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 RD16F-T8-AZ part is unused and in its original packaging.
Return procedure for RD16F-T8-AZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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