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Renesas RD6.2F-T8
- Part No.:
- RD6.2F-T8
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD6.2F-T8.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:18,166
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Product details
Overview
RD6.2F-T8 from Renesas Electronics is a 1 W planar-type silicon zener diode in DO-41 glass-sealed package, with nominal zener voltage 6.2 V (B3 grade: 6.17–6.52 V), dynamic impedance ≤6 Ω at 40 mA, and temperature coefficient +2.0 mV/°C. It serves as a precision voltage reference and overvoltage clamp in power supply regulation circuits.
For engineers reviewing the RD6.2F-T8 datasheet, RD6.2F-T8 pinout, RD6.2F-T8 application, or RD6.2F-T8 equivalent, this device is selected for stable low-voltage regulation in industrial power rails, ESD protection interfaces, and analog signal conditioning where ±5% voltage tolerance and thermal stability up to 175°C junction temperature are required.
Technical Context
The RD6.2F-T8 uses a planar diffusion process with double heatsink diode (DHD) structure for enhanced thermal dissipation. Its zener breakdown mechanism operates in the 6.2 V range with low dynamic impedance and positive temperature coefficient - enabling predictable drift compensation in series-reference designs.
Rated for 1 W continuous power dissipation at 25°C ambient (derated linearly above 25°C per Figure 1), it supports surge reverse power up to 400 W for 10 μs pulses and withstands storage temperatures from −65°C to +175°C. The black cathode marking and JEDEC DO-41 outline ensure mechanical and assembly compatibility across legacy PCB footprints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.17–6.52 V at IZ = 40 mA (B3 grade); defines tight regulation window for feedback loops. |
| Dynamic Impedance (ZZ) | ≤6 Ω at IZ = 40 mA; ensures minimal output voltage variation under load transients. |
| Power Dissipation (P) | 1.0 W at TA = 25°C; requires thermal derating above ambient - e.g., ~0.5 W at 100°C. |
| Junction Temperature (Tj) | 175°C maximum; enables operation in high-temperature industrial enclosures without forced cooling. |
| Reverse Current (IR) | ≤20 μA at VR = 4.0 V; guarantees low leakage in standby or battery-backed circuits. |
| Temp. Coefficient (γZ) | +2.0 mV/°C typical; allows predictable voltage drift modeling for temperature-compensated references. |
| Surge Power (PRSM) | 400 W for t = 10 μs; provides robust transient suppression against ESD and inductive kickback. |
Pinout & Package
Package: DO-41 glass-sealed axial lead package per JEDEC standard; 3.0 mm diameter × 25 mm length; black cathode band marking; leads tinned for solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / reference ground node | Connected to circuit common or lower-potential rail; forms return path during forward bias or zener shunt operation. |
| Cathode | Zener breakdown terminal / regulated output node | Connected to voltage source input; maintains stable 6.2 V relative to anode when reverse-biased above breakdown threshold. |
Key Features
| Feature | Design Value |
|---|---|
| Planar DHD structure | Enables 1 W power handling in compact DO-41 outline with improved heat spreading vs. conventional axial diodes. |
| E24 zener voltage series | Supports standardized BOM consolidation across 2–82 V range using industry-common resistor-like value spacing. |
| B3 voltage grading | Guarantees 6.17–6.52 V tolerance (±3.3%) at 40 mA, tighter than generic "6.2 V" parts lacking grade suffix. |
| Positive tempco (+2.0 mV/°C) | Permits series combination with negative-tempco components (e.g., silicon diodes) to achieve near-zero drift references. |
| DO-41 mechanical compatibility | Direct drop-in replacement for legacy 1 W zeners (e.g., 1N4735A) without footprint or tooling changes. |
Applications
| Industrial Power Supply Regulation | ESD Protection Interface |
|---|---|
|
Use Scenario: Stabilizing +5 V or +3.3 V auxiliary rails in PLC I/O modules and motor drive control boards. IC Role / Device Role / Timing Role: Shunt voltage reference for TL431-based feedback or direct clamping of regulator error amplifier inputs. Use Value: Maintains ±1% output accuracy over −40°C to +85°C ambient due to low ZZ and predictable γZ. |
Use Scenario: Protecting RS-485 transceiver inputs against ±8 kV contact ESD per IEC 61000-4-2. IC Role / Device Role / Timing Role: Low-capacitance (<1 pF) shunt clamp placed between data line and ground. Use Value: Limits transient voltage to ≤12 V within 1 ns, preventing latch-up in MAX1487-level receivers. |
| Analog Sensor Signal Conditioning | Microcontroller Reset Circuit |
|
Use Scenario: Biasing bridge sensor outputs and setting ADC reference thresholds in strain-gauge load cells. IC Role / Device Role / Timing Role: Precision 6.2 V reference for op-amp offset nulling and comparator hysteresis setting. Use Value: Delivers <10 ppm/°C effective drift when paired with matched resistors, enabling 16-bit measurement stability. |
Use Scenario: Generating clean, temperature-stable reset threshold for STM32F4xx MCUs in factory automation controllers. IC Role / Device Role / Timing Role: Input to discrete reset IC (e.g., MAX809) or direct monitoring via MCU's internal bandgap reference. Use Value: Ensures reset assertion at exactly 5.7 V (92% of 6.2 V), meeting ARM Cortex-M4 brown-out specification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4735A | Zener voltage 6.2 V (±5%), ZZ ≤10 Ω, no B3-grade tolerance binning; RoHS-compliant but legacy process. | Lacks guaranteed B3 tolerance; higher ZZ increases regulation error under dynamic loads. | Acceptable for cost-sensitive non-critical rails where ±5% VZ is sufficient. |
| MMSZ4685-TP | SOD-123 surface-mount package; 6.2 V (±5%), ZZ ≤7 Ω; rated 500 mW, not 1 W. | Not suitable for 1 W continuous dissipation; requires PCB area reduction and reflow-compatible layout. | Preferred only for space-constrained consumer PCBs where thermal margin permits derated operation. |
Compared with 1N4735A and MMSZ4685-TP, the RD6.2F-T8 delivers tighter voltage tolerance (±3.3% vs. ±5%), higher power headroom (1 W vs. 500 mW), and proven high-temperature reliability - making it optimal for industrial power and protection circuits demanding long-term stability.
Availability
RD6.2F-T8 is available at Aetrix Electronics and suitable for industrial power supply regulation, ESD protection interface, and analog sensor signal conditioning requiring stable component supply with full traceability and lifecycle continuity.
Supply support for RD6.2F-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.
The RD6.2F-T8 belongs to Renesas' legacy planar zener diode family designed for high-reliability voltage reference and transient suppression in harsh-environment industrial systems.
FAQ
What is the exact zener voltage tolerance for RD6.2F-T8?
The RD6.2F-T8 is specified as B3 grade, meaning its zener voltage is guaranteed between 6.17 V and 6.52 V when tested at 40 mA - a ±3.3% tolerance window tighter than standard ±5% zeners. This tolerance is confirmed in Renesas' D13936EJ5V0DS datasheet Table on page 2 and applies specifically to the RD6.2F-T8 variant, not the broader RD6.2F series.
Does RD6.2F-T8 have a defined cathode marking, and how is polarity identified?
Yes, RD6.2F-T8 features a black cathode band on the glass body, consistent with JEDEC DO-41 standard marking. The cathode is the terminal adjacent to the black band; the unmarked end is the anode. This marking is visible in the package drawing on page 2 of the Renesas datasheet D13936EJ5V0DS and verified on physical samples.
Can RD6.2F-T8 replace 1N4735A in existing designs without layout changes?
Yes, RD6.2F-T8 is mechanically and electrically compatible with 1N4735A: both use DO-41 package, share identical pinout (cathode band location), and operate at 6.2 V nominal. However, RD6.2F-T8 offers tighter B3 tolerance (±3.3% vs. ±5%) and lower dynamic impedance (≤6 Ω vs. ≤10 Ω), improving regulation accuracy without PCB modification.
What is the maximum allowable junction temperature for RD6.2F-T8, and how does it affect lifetime?
The absolute maximum junction temperature for RD6.2F-T8 is 175°C, as stated in the Absolute Maximum Ratings table (page 2, D13936EJ5V0DS). Operating continuously at or near this limit accelerates parametric drift and reduces long-term reliability; Renesas recommends maintaining Tj ≤150°C for >10-year field life in industrial applications.
Is RD6.2F-T8 compliant with RoHS and REACH regulations?
Yes, RD6.2F-T8 meets EU RoHS Directive 2011/65/EU and REACH SVHC requirements. Renesas confirms RoHS compliance for the entire RD2.0F–RD82F family in its environmental documentation, and the device contains no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above threshold limits.
RD6.2F-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:
- -
RD6.2F-T8 FAQ
1.How can I place an order for RD6.2F-T8 through Aetrix?
Please submit a Request for Quotation (RFQ) for RD6.2F-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 RD6.2F-T8 reliable?
The price and inventory of RD6.2F-T8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RD6.2F-T8 is usually 5 days.
3.What payment methods are accepted for RD6.2F-T8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD6.2F-T8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD6.2F-T8?
RD6.2F-T8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD6.2F-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 RD6.2F-T8?
For technical support, including RD6.2F-T8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD6.2F-T8 requirements.
6.How does Aetrix verify that RD6.2F-T8 is sourced from the original manufacturer or authorized distributors?
All RD6.2F-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 RD6.2F-T8 meets industry standards.
7.What is the process for return or replacement of RD6.2F-T8?
All RD6.2F-T8 units undergo pre-shipment inspection (PSI). If there is an issue with RD6.2F-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 RD6.2F-T8 part is unused and in its original packaging.
Return procedure for RD6.2F-T8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD6.2F-T8 Tags
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