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Renesas RD16F-T7-AZ
- Part No.:
- RD16F-T7-AZ
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD16F-T7-AZ.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:221,500
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Product details
Overview
RD16F-T7-AZ from Renesas Electronics is a 1 W planar silicon Zener diode with 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, designed for precision voltage regulation and surge absorption in power supply rails and reference circuits.
For engineers reviewing the RD16F-T7-AZ datasheet, RD16F-T7-AZ pinout, RD16F-T7-AZ application, or RD16F-T7-AZ equivalent, this component serves as a stable 16 V shunt regulator in industrial power supplies, overvoltage protection circuits, and analog reference design-where tight voltage tolerance, low dynamic impedance, and predictable thermal drift are critical.
Technical Context
This device operates as a two-terminal shunt regulator, maintaining a stable reverse-biased breakdown voltage across its anode–cathode terminals under controlled current conditions. Its planar glass-sealed DHD (Double Heatsink Diode) structure enables 1 W continuous power dissipation at 25°C ambient and supports surge reverse power up to 400 W for 10 μs pulses.
The RD16F-T7-AZ exhibits a positive zener voltage temperature coefficient (+13 mV/°C), indicating increasing VZ with rising junction temperature-critical for thermal stability analysis in bias networks. It complies with JEDEC DO-41 mechanical outline and is rated for storage temperatures from −65°C to +175°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15.89–16.71 V (B3 grade, tested at 40 ms after power-on; defines regulation window) |
| Power Dissipation (P) | 1.0 W at TA = 25°C; derates linearly above 25°C per Figure 1 |
| Dynamic Impedance (ZZ) | 12 Ω max at IZ = 20 mA; determines output voltage variation under load transients |
| Reverse Current (IR) | 10 μA max at VR = 12 V; sets leakage-dependent error in high-impedance bias networks |
| Temperature Coefficient (γZ) | +13 mV/°C typical at IZ = 20 mA; quantifies VZ drift vs. junction temperature |
| Surge Reverse Power (PRSM) | 400 W for t = 10 μs (non-repetitive); enables transient overvoltage clamping without failure |
| Junction Temperature (Tj) | 175°C max; constrains thermal design margin in PCB layout and heatsinking |
Pinout & Package
RD16F-T7-AZ uses the JEDEC DO-41 axial-leaded glass package (3.0 mm diameter × 5.0 mm length), with cathode indicated by a black band. The device has two terminals: anode (unmarked end) and cathode (banded end).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; reference node in shunt regulation | Connected to lower-potential side of regulated circuit; must handle forward surge during polarity reversal |
| Cathode | Current exit terminal in reverse breakdown; regulated voltage node | Connected to voltage rail being stabilized; carries full zener current and must be routed with low-inductance path |
Key Features
| Feature | Design Value |
|---|---|
| E24-series zener voltage grading | Enables standardized B1/B2/B3 tolerance bins (±1.5% to ±3%) for consistent BOM management |
| Planar DHD structure | Provides 1 W steady-state dissipation with improved thermal resistance vs. alloy-junction diodes |
| Positive γZ at 16 V | Compensates negative tempcos of other components (e.g., transistors) in temperature-stable references |
| DO-41 mechanical compatibility | Ensures drop-in replacement in legacy through-hole power supply designs without footprint change |
| 175°C maximum junction temperature | Supports operation in high-ambient industrial environments (e.g., motor drives, PLCs) |
Applications
| Industrial Power Supply Regulation | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Stabilizing +15 V rail in programmable logic controller (PLC) I/O module power stage. IC Role / Device Role / Timing Role: Shunt voltage reference and error amplifier feedback element. Use Value: Maintains ±1.5% output accuracy over −40°C to +85°C ambient via matched γZ compensation with op-amp input offset drift. |
Use Scenario: Clamping induced surges on 24 V DC fieldbus line exposed to inductive switching noise. IC Role / Device Role / Timing Role: Transient voltage suppressor (TVS) alternative for sub-100 ns events. Use Value: Absorbs 400 W surge energy (10 μs) without degradation, preventing downstream IC latch-up in industrial sensors. |
| Analog Reference Circuit | Waveform Limiting |
Use Scenario: Providing stable 16 V reference for 12-bit DAC buffer amplifier in test equipment. IC Role / Device Role / Timing Role: Precision voltage source for op-amp bias network. Use Value: Delivers <12 Ω dynamic impedance to minimize code-dependent reference droop during fast DAC settling. |
Use Scenario: Symmetrical clipping of ±15 V audio signal in studio preamplifier front-end. IC Role / Device Role / Timing Role: Bidirectional limiter using back-to-back configuration. Use Value: Achieves <0.5 V transition sharpness at 10 mA due to low ZZ, preserving harmonic integrity in clipping threshold. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4744A | 15 V nominal (14.25–15.75 V), 16 Ω ZZ at 25 mA, −5 mV/°C γZ | Negative tempco limits use in temperature-compensated references | Select when cost sensitivity outweighs tempco matching needs; verify 15 V vs. 16 V system margin |
| BZX85C16 | 16 V nominal (15.3–16.7 V), 20 Ω ZZ at 5 mA, +12 mV/°C γZ, DO-41 but plastic package | Lower surge rating (100 W @ 10 μs) and higher ZZ reduce transient robustness | Prefer for non-safety-critical consumer gear where plastic DO-41 suffices and 1 W steady-state is not required |
Compared with 1N4744A and BZX85C16, RD16F-T7-AZ offers tighter voltage tolerance (B3 bin), lower dynamic impedance, superior surge capability, and a temperature coefficient better aligned with industrial reference design requirements-making it optimal for high-reliability 16 V regulation where thermal stability and transient immunity are prioritized.
Availability
RD16F-T7-AZ is available at Aetrix Electronics and suitable for industrial power supplies, overvoltage protection circuits, and analog reference designs requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for RD16F-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 delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, and enterprise systems.
RD16F-T7-AZ belongs to Renesas' legacy planar Zener diode family (RD2.0F–RD82F), engineered for high-reliability voltage regulation and surge suppression in industrial-grade power electronics.
FAQ
What is the exact zener voltage range for RD16F-T7-AZ?
The RD16F-T7-AZ is specified as a B3-grade device with a zener voltage range of 15.89 V to 16.71 V at IZ = 20 mA and TA = 25°C, per Renesas Data Sheet D13936EJ5V0DS. This binning ensures tighter tolerance than standard B-grade parts and is validated per the 40 ms test protocol defined in Note 1 of the datasheet.
Does RD16F-T7-AZ have a positive or negative temperature coefficient?
RD16F-T7-AZ has a positive zener voltage temperature coefficient of +13 mV/°C (typical) at IZ = 20 mA. This value is explicitly listed in the Electrical Characteristics table for the RD16F row and is confirmed in Figure 4 and Figure 5 of the datasheet, enabling thermal drift compensation in precision reference designs.
What is the maximum surge reverse power rating for RD16F-T7-AZ?
RD16F-T7-AZ supports a non-repetitive surge reverse power of 400 W for pulse width t = 10 μs, as stated in the Absolute Maximum Ratings table and illustrated in Figure 7 of the official datasheet. This rating assumes TA = 25°C and applies only to single-event transients-not repetitive surges.
Is RD16F-T7-AZ compatible with DO-41 footprint layouts?
Yes, RD16F-T7-AZ conforms to the JEDEC DO-41 axial package outline (3.0 mm Ø × 5.0 mm L) with cathode marked by a black band, as shown in the Package Drawing on page 2 of the datasheet. Its lead spacing and dimensions match industry-standard DO-41 footprints, enabling direct substitution in existing through-hole designs.
What quality grade is assigned to RD16F-T7-AZ?
RD16F-T7-AZ is classified as a "Standard" quality grade product per Renesas' quality grading policy (Notice #7), meaning it is qualified for use in computers, office equipment, communications gear, industrial robots, and similar commercial/industrial applications-but not for automotive safety, medical life-support, or aerospace systems without explicit written consent.
RD16F-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:
- -
RD16F-T7-AZ FAQ
1.How can I place an order for RD16F-T7-AZ through Aetrix?
Please submit a Request for Quotation (RFQ) for RD16F-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 RD16F-T7-AZ reliable?
The price and inventory of RD16F-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 RD16F-T7-AZ is usually 5 days.
3.What payment methods are accepted for RD16F-T7-AZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD16F-T7-AZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD16F-T7-AZ?
RD16F-T7-AZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD16F-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 RD16F-T7-AZ?
For technical support, including RD16F-T7-AZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD16F-T7-AZ requirements.
6.How does Aetrix verify that RD16F-T7-AZ is sourced from the original manufacturer or authorized distributors?
All RD16F-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 RD16F-T7-AZ meets industry standards.
7.What is the process for return or replacement of RD16F-T7-AZ?
All RD16F-T7-AZ units undergo pre-shipment inspection (PSI). If there is an issue with RD16F-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 RD16F-T7-AZ part is unused and in its original packaging.
Return procedure for RD16F-T7-AZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD16F-T7-AZ Tags
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