My Inquiry
My Account
Renesas RD16F-T8
- Part No.:
- RD16F-T8
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD16F-T8.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
RD16F-T8 from Renesas Electronics is a 1 W planar-type 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 suppression in DC power rails and reference circuits.
For engineers reviewing the RD16F-T8 datasheet, RD16F-T8 pinout, RD16F-T8 application, or RD16F-T8 equivalent, this device serves as a stable 16 V voltage reference in industrial power supplies, overvoltage clamping circuits, and analog signal conditioning stages where ±5% tolerance and low thermal drift are required.
Technical Context
The RD16F-T8 operates as a two-terminal voltage-reference device relying on controlled reverse-breakdown conduction. 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.
It exhibits a positive zener voltage temperature coefficient (+13 mV/°C) typical of mid-voltage Zeners (>10 V), ensuring predictable voltage drift across −65°C to +175°C storage range and stable operation in ambient temperatures up to 150°C with derated power.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15.89–16.71 V (B3 grade, tested at 20 mA); ensures tight 16 V regulation under standard bias conditions. |
| Power Dissipation (P) | 1.0 W at TA = 25°C; defines maximum continuous DC power handling before thermal shutdown or degradation. |
| Dynamic Impedance (ZZ) | 12 Ω at IZ = 20 mA; indicates low AC impedance for stable regulation against load transients. |
| Reverse Current (IR) | ≤10 μA at VR = 12.8 V; confirms minimal leakage below breakdown, critical for low-power standby circuits. |
| Temp. Coefficient (γZ) | +13 mV/°C (typical); quantifies voltage drift per degree - enables accurate thermal compensation in precision references. |
| Junction Temperature (Tj) | 175°C max; sets absolute upper thermal limit for reliable long-term operation without parametric shift. |
| Surge Reverse Power (PRSM) | 400 W (t = 10 μs); supports transient overvoltage absorption in ESD/surge protection stages. |
Pinout & Package
RD16F-T8 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 and cathode - no internal circuitry or control pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / reference ground node | Connected to lower-potential side in reverse-bias configuration; establishes return path for zener current. |
| Cathode | Zener breakdown terminal / regulated output node | Marked with black band; delivers stable 16 V when reverse-biased above VZ with appropriate series resistance. |
Key Features
| Feature | Design Value |
|---|---|
| 1 W Planar Zener Structure | Enables higher reliability and tighter parameter distribution vs. diffused-junction alternatives, supporting industrial-grade life cycles. |
| E24-Series Voltage Standardization | Aligns with IEC 60063 E24 preferred values, simplifying BOM consolidation across 2–82 V zener families. |
| B3 Voltage Grade Tolerance | ±0.82 V (5.1% max deviation from 16 V nominal), enabling interchangeability within defined design margins. |
| DO-41 Glass Package | Provides hermetic sealing and proven thermal performance in wave-soldered or hand-soldered PCB assemblies. |
| Positive Tempco at 16 V | +13 mV/°C allows predictable upward voltage shift with temperature - useful for compensating negative-drift components. |
Applications
| Industrial Power Supply Regulation | Overvoltage Clamping Circuit |
|---|---|
|
Use Scenario: Stabilizing feedback reference in 24 V DC-DC converter secondary-side error amplifiers. IC Role / Device Role / Timing Role: Zener diode providing fixed 16 V reference to optocoupler input or TL431 cathode. Use Value: Maintains ±1% output regulation across line/load/temperature with <12 Ω dynamic impedance limiting error amplifier noise coupling. |
Use Scenario: Protecting microcontroller I/O pins from 24 V field-wire transients in factory automation PLC modules. IC Role / Device Role / Timing Role: Shunt clamp absorbing >400 W surges (10 μs) before TVS activation threshold. Use Value: Extends system-level surge immunity beyond IEC 61000-4-5 Level 3 by limiting clamping voltage to ≤18 V during fast transients. |
| Analog Signal Level Shifting | Temperature-Compensated Reference |
|
Use Scenario: Biasing op-amp inputs in 4–20 mA transmitter circuits operating from unregulated 12–36 V supply rails. IC Role / Device Role / Timing Role: Provides stable 16 V rail for active circuitry while rejecting supply ripple. Use Value: Delivers <10 μA leakage at 12.8 V, minimizing offset errors in high-impedance sensor front-ends. |
Use Scenario: Compensating thermistor-based temperature sensors in HVAC control boards requiring <0.5°C accuracy. IC Role / Device Role / Timing Role: Paired with negative-tempco component to cancel net drift in reference ladder network. Use Value: +13 mV/°C tempco matches known NTC curves, enabling passive cancellation without active circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4744A (ON Semiconductor) | 15 V nominal, ±5% tolerance, 16 Ω ZZ at 25 mA, DO-41 package. | Slightly lower voltage and higher dynamic impedance; less suitable for tight 16 V references. | Select when 15 V is acceptable and cost sensitivity outweighs 1 V regulation precision. |
| BZX85C16 (Nexperia) | 16 V nominal, ±5% tolerance, 20 Ω ZZ at 5 mA, DO-41 package, 1.3 W rating. | Higher ZZ and lower test current reduce regulation stability under varying loads. | Prefer for general-purpose clamping where 12 Ω impedance is not critical and higher surge margin is needed. |
Compared with RD16F-T8, the 1N4744A offers lower cost but sacrifices 1 V headroom and regulation fidelity, while the BZX85C16 trades dynamic impedance performance for marginally higher surge capability - making RD16F-T8 optimal for precision 16 V references demanding low-Z stability and predictable +13 mV/°C drift.
Availability
RD16F-T8 is available at Aetrix Electronics and suitable for industrial power supplies, overvoltage protection circuits, and analog signal conditioning systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for RD16F-T8 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.
RD16F-T8 belongs to Renesas' legacy planar Zener diode family designed for high-reliability voltage reference and transient suppression in standard-grade industrial equipment.
FAQ
What is the exact zener voltage tolerance for RD16F-T8?
The RD16F-T8 is specified in the B3 voltage grade, with a minimum zener voltage of 15.89 V and maximum of 16.71 V at 20 mA test current - representing a total tolerance of ±0.41 V (±2.6%) around the nominal 16 V point. This tighter spread than generic B-grade devices supports designs requiring predictable regulation without post-production binning.
Does RD16F-T8 support surge protection per IEC 61000-4-5?
Yes, RD16F-T8 supports transient suppression with a rated surge reverse power of 400 W for 10 μs pulses at 25°C ambient, as confirmed in Figure 7 of the official datasheet. While not certified to IEC 61000-4-5 alone, it functions effectively as a first-stage clamp in coordinated protection schemes when paired with series impedance and downstream TVS devices.
What is the thermal resistance junction-to-ambient for RD16F-T8 in free air?
RD16F-T8 has a typical thermal resistance (RthJA) of approximately 200°C/W in free air (no heatsink), derived from Figure 2 in the datasheet showing Rth ≈ 200°C/W at S = 10 mm² foil area. This value assumes standard DO-41 mounting on 10 mm² copper pad and defines safe continuous power derating above 25°C ambient.
Can RD16F-T8 be used in place of RD16F without the "-T8" suffix?
Yes - the "-T8" suffix denotes tape-and-reel packaging per JEDEC standard; electrically and thermally, RD16F-T8 is identical to bulk-packaged RD16F. Both share identical zener voltage, dynamic impedance, temperature coefficient, and absolute maximum ratings - only packaging format differs for automated assembly compatibility.
Is RD16F-T8 compliant with RoHS and lead-free soldering processes?
RD16F-T8 meets EU RoHS Directive requirements as confirmed by Renesas' environmental compliance documentation. It supports lead-free reflow profiles (JEDEC J-STD-020) with peak temperatures up to 260°C, and its glass-passivated DO-41 package withstands multiple thermal cycles without parameter shift or mechanical failure.
RD16F-T8 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 FAQ
1.How can I place an order for RD16F-T8 through Aetrix?
Please submit a Request for Quotation (RFQ) for RD16F-T8 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 reliable?
The price and inventory of RD16F-T8 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 is usually 5 days.
3.What payment methods are accepted for RD16F-T8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD16F-T8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD16F-T8?
RD16F-T8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD16F-T8 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?
For technical support, including RD16F-T8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD16F-T8 requirements.
6.How does Aetrix verify that RD16F-T8 is sourced from the original manufacturer or authorized distributors?
All RD16F-T8 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 meets industry standards.
7.What is the process for return or replacement of RD16F-T8?
All RD16F-T8 units undergo pre-shipment inspection (PSI). If there is an issue with RD16F-T8, 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 part is unused and in its original packaging.
Return procedure for RD16F-T8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD16F-T8 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
