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Renesas RD16F-T6-AZ
- Part No.:
- RD16F-T6-AZ
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD16F-T6-AZ.pdf
- Description:
- DIODE ZENER
- Quantity:
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Inventory:2,500
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Product details
Overview
RD16F-T6-AZ from Renesas Electronics is a 1 W planar-type silicon Zener diode with nominal zener voltage of 16 V (B grade, min 15.89 V / max 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 protection in power supply rails and reference circuits.
For engineers reviewing the RD16F-T6-AZ datasheet, RD16F-T6-AZ pinout, RD16F-T6-AZ application, or RD16F-T6-AZ equivalent, this device serves as a stable 16 V shunt regulator in industrial power supplies, analog sensor biasing, and overvoltage clamp circuits where ±5% voltage tolerance and low thermal drift are required.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified test current of 20 mA and maintains regulation across ambient temperatures from −65°C to +175°C. Its DO-41 glass-sealed package provides mechanical robustness and thermal dissipation capability up to 1 W at 25°C, derating linearly above that temperature per Figure 1.
The device exhibits a positive zener voltage temperature coefficient (+13 mV/°C) and low dynamic impedance (12 Ω), enabling stable regulation under varying load conditions. It supports surge reverse power of 400 W for 10 μs pulses, making it suitable for transient suppression in DC power interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15.89 V to 16.71 V at IZ = 20 mA - defines regulated output voltage range for shunt reference applications. |
| Power Dissipation (P) | 1.0 W at TA = 25°C - sets maximum continuous DC power handling before thermal derating applies. |
| Dynamic Impedance (ZZ) | 12 Ω at IZ = 20 mA - indicates small-signal AC resistance affecting regulation accuracy under load transients. |
| Temperature Coefficient (γZ) | +13 mV/°C - quantifies voltage drift with temperature; positive value enables compensation pairing with negative-coefficient devices. |
| Reverse Current (IR) | ≤10 μA at VR = 12 V - ensures minimal leakage in standby or high-impedance bias networks. |
| Junction Temperature (Tj) | 175°C maximum - determines safe operating envelope under power dissipation and PCB thermal design. |
| Surge Reverse Power (PRSM) | 400 W for t = 10 μs - supports single-event transient suppression without failure in unprotected input stages. |
Pinout & Package
RD16F-T6-AZ uses a DO-41 axial-leaded glass package (JEDEC standard), with cathode indicated by a black band. The device has two terminals: anode and cathode - no internal circuitry or multi-pin configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / reference ground node in shunt configuration | Connected to system ground or lower-potential rail; carries forward current up to 200 mA. |
| Cathode | Zener breakdown terminal / regulated output node | Connected to voltage rail being clamped; sinks reverse current to maintain VZ during regulation. |
Key Features
| Feature | Design Value |
|---|---|
| 1 W Planar Zener Structure | Enables stable, repeatable breakdown characteristics and improved reliability vs. alloy-junction diodes. |
| E24 Standard Voltage Series | Ensures compatibility with common BOM libraries and simplifies voltage selection across design generations. |
| DO-41 Glass Package | Provides hermetic sealing, high-voltage isolation (>1000 V), and proven thermal performance on FR-4 PCBs. |
| Positive Temperature Coefficient | Allows series combination with negative-TC devices (e.g., forward-biased diodes) for near-zero-drift references. |
| B Grade Voltage Tolerance | ±5% (15.89–16.71 V) balances cost and precision for non-critical regulation tasks like power rail clamping. |
Applications
| Industrial Power Supply Clamp | Analog Sensor Bias Reference |
|---|---|
|
Use Scenario: Clamping 24 V DC input rail against ESD and load-dump transients in PLC I/O modules. IC Role / Device Role / Timing Role: Shunt regulator and transient suppressor placed between rail and ground. Use Value: Limits voltage excursions to ≤16.71 V, protecting downstream LDOs and microcontrollers rated for 18 V absolute max. |
Use Scenario: Providing stable 16 V bias to op-amp-based current-sense amplifiers in motor drives. IC Role / Device Role / Timing Role: Precision voltage reference source for analog front-end gain-setting networks. Use Value: Maintains <±0.5% output stability over −40°C to +85°C due to predictable +13 mV/°C TC and low ZZ. |
| DC-DC Converter Feedback Divider | Overvoltage Protection Circuit |
|
Use Scenario: Acting as upper leg of feedback divider in isolated flyback converters requiring 16 V output. IC Role / Device Role / Timing Role: Zener element setting reference point for optocoupler feedback loop. Use Value: Replaces TL431 in cost-sensitive designs where 1% initial tolerance is acceptable and external compensation is used. |
Use Scenario: Secondary-side overvoltage detection in battery charger adapters with 19 V nominal output. IC Role / Device Role / Timing Role: Threshold detector triggering shutdown via comparator when rail exceeds 16.71 V. Use Value: Delivers fast response (<100 ns) to overvoltage events with negligible standby current (≤10 μA at 12 V). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4744A | Zener voltage 14 V (13.3–14.7 V), 1 W, DO-41, γZ = +8.5 mV/°C, ZZ = 14 Ω | Lower voltage rating; less suitable for 16 V rail clamping but better for 15 V logic supply regulation. | Select when 14 V regulation is sufficient and tighter γZ consistency across batches is prioritized. |
| BZX85C16 | Zener voltage 16 V (15.2–16.8 V), 1.3 W, DO-41, γZ = +12 mV/°C, ZZ = 15 Ω | Slightly higher power rating and wider voltage tolerance; same thermal profile but marginally higher ZZ. | Choose for enhanced surge margin in high-reliability industrial environments where 1.3 W headroom matters. |
Compared with RD16F-T6-AZ, 1N4744A offers lower voltage and tighter TC but cannot regulate at 16 V, while BZX85C16 matches voltage closely and adds 0.3 W power headroom - both require validation of leakage and transient response in the target circuit.
Availability
RD16F-T6-AZ is available at Aetrix Electronics and suitable for industrial power supplies, analog sensor interfaces, and overvoltage protection circuits requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for RD16F-T6-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 discrete power components.
The RD16F-T6-AZ belongs to the RD2.0F–RD82F planar Zener diode family, engineered for general-purpose voltage regulation and transient suppression in standard-grade industrial and consumer equipment.
FAQ
What is the zener voltage tolerance of RD16F-T6-AZ?
The RD16F-T6-AZ has a B-grade zener voltage specification of 15.89 V minimum to 16.71 V maximum at 20 mA test current, representing a ±5% tolerance band around the nominal 16 V rating. This tolerance is verified per the D13936EJ5V0DS datasheet and applies under standard 40 ms pulse testing conditions.
Does RD16F-T6-AZ have a cathode marking, and how is it identified?
Yes, RD16F-T6-AZ features a black cathode band on its DO-41 glass body, consistent with JEDEC DO-41 polarity convention. The banded end is the cathode terminal, and the unmarked end is the anode - critical for correct orientation in shunt regulation and clamping configurations.
What is the maximum surge reverse power rating for RD16F-T6-AZ?
RD16F-T6-AZ supports a surge reverse power of 400 W for a 10 μs pulse width at TA = 25°C, as defined in Figure 7 of the D13936EJ5V0DS datasheet. This rating enables reliable transient suppression without degradation when used with appropriate series current limiting.
Can RD16F-T6-AZ be used in place of a TL431 in feedback circuits?
RD16F-T6-AZ can serve as a basic shunt reference in simplified feedback paths where 16 V regulation and ±5% tolerance are acceptable, but it lacks the adjustable output, low output impedance, and built-in error amplifier of the TL431. Use RD16F-T6-AZ only in fixed-voltage, low-bandwidth applications without dynamic compensation requirements.
Is RD16F-T6-AZ compliant with RoHS and lead-free soldering standards?
Yes, RD16F-T6-AZ meets EU RoHS Directive requirements and is compatible with lead-free reflow soldering processes. Renesas Electronics confirms environmental compliance in accordance with applicable regulations, and the device carries no restricted substances above threshold limits.
RD16F-T6-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-T6-AZ FAQ
1.How can I place an order for RD16F-T6-AZ through Aetrix?
Please submit a Request for Quotation (RFQ) for RD16F-T6-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-T6-AZ reliable?
The price and inventory of RD16F-T6-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-T6-AZ is usually 5 days.
3.What payment methods are accepted for RD16F-T6-AZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD16F-T6-AZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD16F-T6-AZ?
RD16F-T6-AZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD16F-T6-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-T6-AZ?
For technical support, including RD16F-T6-AZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD16F-T6-AZ requirements.
6.How does Aetrix verify that RD16F-T6-AZ is sourced from the original manufacturer or authorized distributors?
All RD16F-T6-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-T6-AZ meets industry standards.
7.What is the process for return or replacement of RD16F-T6-AZ?
All RD16F-T6-AZ units undergo pre-shipment inspection (PSI). If there is an issue with RD16F-T6-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-T6-AZ part is unused and in its original packaging.
Return procedure for RD16F-T6-AZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD16F-T6-AZ Tags
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