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Renesas RD16ES-T4-AZ
- Part No.:
- RD16ES-T4-AZ
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD16ES-T4-AZ.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:20,000
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Product details
Overview
RD16ES-T4-AZ from Renesas Electronics is a 16 V, ±5% tolerance zener diode in DO-34 glass package with 400 mW power dissipation, DHD (Double Heatsink Diode) construction, and 0.5 µA reverse current at 12 V. It delivers stable voltage regulation in compact board space and is rated for 175°C junction temperature.
For engineers reviewing the RD16ES-T4-AZ datasheet, RD16ES-T4-Az pinout, RD16ES-T4-AZ application, or RD16ES-T4-AZ equivalent, this part serves as a precision low-power shunt regulator in analog reference, overvoltage clamping, and biasing circuits where thermal stability and tight voltage tolerance are required.
Technical Context
This planar-processed zener diode uses DHD construction to enhance thermal performance by enabling dual heat paths through both leads. Its dynamic impedance of 25 Ω at 5 mA and knee impedance of 150 Ω at 0.5 mA support stable regulation under varying load conditions.
The device exhibits a positive zener voltage temperature coefficient of +8.0 mV/°C (typical), consistent with its 16 V nominal rating, and maintains operation across –65°C to +175°C storage and junction temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 14.87–16.50 V at IZ = 5 mA - defines regulated output range for reference or clamp circuits |
| Power Dissipation (P) | 400 mW at TA = 25°C - sets maximum continuous DC power handling on standard PCB |
| Dynamic Impedance (ZZ) | 25 Ω max at IZ = 5 mA - determines regulation stiffness against load current variation |
| Knee Impedance (ZZK) | 150 Ω max at IZK = 0.5 mA - indicates onset of stable regulation at low bias currents |
| Reverse Current (IR) | 0.2 µA max at VR = 12 V - ensures minimal leakage in high-impedance bias networks |
| Surge Power (PRSM) | 100 W non-repetitive at t = 10 µs - supports transient overvoltage suppression without failure |
| Junction Temperature (Tj) | 175°C max - enables reliable operation in thermally constrained industrial environments |
Pinout & Package
RD16ES-T4-AZ is housed in a DO-34 (JEDEC) glass-sealed axial package with cathode indicated by black band. Leads are tinned for solderability and designed for 5 mm PCB pitch insertion.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node when used in shunt regulation |
| Cathode | Zener breakdown terminal / regulated output node | Provides stable 16 V reference when reverse-biased; marked with black band |
Key Features
| Feature | Design Value |
|---|---|
| DHD (Double Heatsink Diode) construction | Enables dual thermal paths via both axial leads, improving power derating on minimal copper area |
| DO-34 glass package | Allows 5 mm lead pitch insertion and withstands reflow and wave soldering per JEDEC standards |
| E24-standard zener voltage grading | Ensures interchangeability within ±5% tolerance bands across production lots and suppliers |
| 175°C maximum junction temperature | Supports deployment in under-hood automotive modules and industrial motor drive control boards |
| Low knee current (0.5 mA) | Permits stable regulation in ultra-low-power sensor biasing and battery-monitoring applications |
Applications
| Voltage Reference Generator | Overvoltage Clamp Circuit |
|---|---|
|
Use Scenario: Providing stable 16 V reference for ADC biasing and op-amp feedback networks in data acquisition systems. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise DC operating point for analog signal conditioning. Use Value: Tight 14.87–16.50 V tolerance and 25 Ω dynamic impedance ensure <±0.5% reference drift under 1 mA load variation. |
Use Scenario: Protecting microcontroller I/O pins from ESD-induced transients exceeding 16 V in industrial HMI panels. IC Role / Device Role / Timing Role: Passive clamping element diverting surge energy to ground before IC damage occurs. Use Value: 100 W surge rating at 10 µs enables absorption of IEC 61000-4-2 Level 4 contact discharge events without degradation. |
| Constant Current Source Bias | Waveform Clipper Stage |
|
Use Scenario: Setting bias current for LED drivers and phototransistor amplifiers using resistor-zener topology. IC Role / Device Role / Timing Role: Fixed-voltage drop element defining emitter/base bias in discrete transistor current sources. Use Value: 0.2 µA reverse leakage at 12 V minimizes error in sub-10 µA bias current generation. |
Use Scenario: Limiting audio signal peaks to ±16 V in analog mixer front-ends to prevent amplifier saturation. IC Role / Device Role / Timing Role: Symmetric clipping diode pair (with complementary unit) shaping AC waveform amplitude. Use Value: Sharp 16 V breakdown knee and low ZZK enable clean, repeatable clipping with <10 ns response to fast edges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4742A | 12 V nominal, 1 W rating, DO-41 package, 22 Ω ZZ at 21 mA | Higher power, larger footprint, different thermal profile; not drop-in for space-constrained DO-34 layouts | Select when >400 mW continuous dissipation is required and board area permits DO-41 |
| BZX55C16 | 16 V nominal, 500 mW rating, DO-35 package, 40 Ω ZZ at 5 mA | Same voltage grade but higher dynamic impedance and 0.5 µA IR at 12 V - less precise low-current regulation | Choose for cost-sensitive consumer applications where ±5% tolerance and moderate ZZ are acceptable |
Compared with RD16ES-T4-AZ, 1N4742A offers higher power but requires PCB redesign, while BZX55C16 matches voltage but trades off regulation accuracy and leakage for lower cost - RD16ES-T4-AZ remains optimal for space-limited, thermally demanding 16 V reference designs requiring tight tolerance and low knee impedance.
Availability
RD16ES-T4-AZ is available at Aetrix Electronics and suitable for voltage reference generator, overvoltage clamp circuit, and constant current source bias applications requiring stable component supply, long-term lifecycle continuity, and RoHS-compliant sourcing.
Supply support for RD16ES-T4-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 timing solutions for industrial, automotive, and infrastructure markets.
RD16ES-T4-AZ belongs to the legacy RDx.xES series of planar zener diodes engineered for high-reliability voltage regulation in compact, thermally efficient packages targeting industrial control and instrumentation applications.
FAQ
What is the zener voltage tolerance for RD16ES-T4-AZ?
The RD16ES-T4-AZ has a zener voltage range of 14.87 V to 16.50 V at 5 mA test current, corresponding to ±5% tolerance about the nominal 16 V rating. This tolerance is guaranteed per E24 standard grading and verified during production testing per Renesas datasheet D13935EJ7V0DS.
Does RD16ES-T4-AZ support surface-mount assembly?
No, RD16ES-T4-AZ is a through-hole DO-34 axial package device with tinned leads intended for wave or hand soldering. It is not compatible with SMT reflow processes due to glass body construction and axial lead geometry. For SMT alternatives, consider SOD-123 or SOD-323 packaged zeners with equivalent ratings.
What is the maximum surge power rating for RD16ES-T4-AZ?
The RD16ES-T4-AZ supports a non-repetitive surge reverse power of 100 W at pulse width t = 10 µs, as specified in Figure 10 of the Renesas datasheet. This rating enables protection against short-duration transients such as ESD or inductive switching spikes without permanent degradation.
How does the DHD construction benefit RD16ES-T4-AZ in thermal management?
The DHD (Double Heatsink Diode) construction of RD16ES-T4-AZ allows heat to dissipate through both axial leads into the PCB copper, effectively doubling thermal conduction paths. This improves power derating - for example, maintaining 300 mW capability at 70°C ambient versus 400 mW at 25°C - without requiring external heatsinks.
Is RD16ES-T4-AZ compliant with RoHS requirements?
Yes, RD16ES-T4-AZ meets EU RoHS Directive requirements for restricted substances. Renesas Electronics confirms RoHS compliance for this product family in accordance with environmental specifications published on their official website and supporting documentation including datasheet D13935EJ7V0DS.
RD16ES-T4-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:
- -
RD16ES-T4-AZ FAQ
1.How can I place an order for RD16ES-T4-AZ through Aetrix?
Please submit a Request for Quotation (RFQ) for RD16ES-T4-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 RD16ES-T4-AZ reliable?
The price and inventory of RD16ES-T4-AZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RD16ES-T4-AZ is usually 5 days.
3.What payment methods are accepted for RD16ES-T4-AZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD16ES-T4-AZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD16ES-T4-AZ?
RD16ES-T4-AZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD16ES-T4-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 RD16ES-T4-AZ?
For technical support, including RD16ES-T4-AZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD16ES-T4-AZ requirements.
6.How does Aetrix verify that RD16ES-T4-AZ is sourced from the original manufacturer or authorized distributors?
All RD16ES-T4-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 RD16ES-T4-AZ meets industry standards.
7.What is the process for return or replacement of RD16ES-T4-AZ?
All RD16ES-T4-AZ units undergo pre-shipment inspection (PSI). If there is an issue with RD16ES-T4-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 RD16ES-T4-AZ part is unused and in its original packaging.
Return procedure for RD16ES-T4-AZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD16ES-T4-AZ Tags
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