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Renesas RD3.6F
- Part No.:
- RD3.6F
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD3.6F.pdf
- Description:
- DIODE ZENER
- Quantity:
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Inventory:10,700
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Product details
Overview
RD3.6F from Renesas Electronics is a 1 W planar-type silicon Zener diode in DO-41 glass-sealed DHD package, with nominal zener voltage 3.6 V (B2 grade: 3.58–3.83 V), dynamic impedance ≤60 Ω at 40 mA, and temperature coefficient −2.5 mV/°C - used for precision voltage reference and overvoltage clamping in power supply feedback loops.
For engineers reviewing the RD3.6F datasheet, RD3.6F pinout, RD3.6F application, or RD3.6F equivalent, this page delivers verified electrical specs, JEDEC DO-41 terminal mapping, real-world use cases in voltage regulation and surge suppression, and two confirmed alternative Zener diodes with documented parameter alignment.
Technical Context
The RD3.6F operates as a reverse-biased voltage reference device with tight tolerance (±3.5% for B2 grade) and low dynamic impedance (≤60 Ω at IZ = 40 mA), enabling stable regulation under varying load conditions. Its −2.5 mV/°C temperature coefficient ensures predictable drift across industrial ambient ranges.
Designed for 1 W steady-state dissipation at TA = 25°C with derating above 25°C (see Figure 1), it supports surge reverse power up to 400 W for t = 10 μs and withstands junction temperatures up to 175°C - consistent with standard-grade reliability for non-safety-critical electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.58–3.83 V (B2 grade, tested at 40 ms after power-on; defines stable regulation point) |
| Power Dissipation (P) | 1.0 W at TA = 25°C (derates linearly above 25°C per Figure 1; sets max continuous thermal load) |
| Dynamic Impedance (ZZ) | ≤60 Ω at IZ = 40 mA (low AC impedance enables fast transient response in feedback paths) |
| Reverse Current (IR) | ≤20 μA at VR = 1.0 V (ensures minimal leakage in high-impedance bias networks) |
| Temperature Coefficient (γZ) | −2.5 mV/°C (predictable negative drift supports compensation in multi-diode references) |
| Junction Temperature (Tj) | 175°C maximum (defines upper thermal limit for reliability margin in enclosed designs) |
| Surge Reverse Power (PRSM) | 400 W for t = 10 μs (enables single-pulse transient suppression without failure) |
Pinout & Package
RD3.6F uses JEDEC DO-41 glass-sealed axial package (3.0 mm Ø × 5.0 mm max length) with cathode indicated by black band. Terminals are unidirectional: anode (unmarked end) and cathode (banded end).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower potential node in reverse-bias configuration; carries forward current up to 200 mA |
| Cathode | Zener breakdown terminal | Connected to higher potential node; establishes regulated voltage drop when reverse-biased above VZ |
Key Features
| Feature | Design Value |
|---|---|
| 1 W Planar Zener Structure | Enables stable voltage reference with low noise and repeatable breakdown characteristics in compact DO-41 form factor |
| E24-Series Voltage Selection | Supports standardized BOM consolidation across 2–82 V range without custom binning |
| B1/B2/B3 Grade Options | Allows precise voltage targeting (e.g., RD3.6F B2 = 3.58–3.83 V) for tighter regulation than generic Zeners |
| −65 to +175°C Storage Range | Permits use in harsh environments including automotive under-hood and industrial control cabinets |
| DO-41 Mechanical Compatibility | Ensures drop-in replacement in legacy PCB footprints designed for industry-standard axial Zeners |
Applications
| Power Supply Feedback Reference | Overvoltage Clamp Circuit |
|---|---|
Use Scenario: Stabilizing output voltage in isolated flyback or buck converter feedback loop using optocoupler-coupled TL431-like topology. IC Role / Device Role / Timing Role: Provides precise 3.6 V reference to comparator input, defining regulation threshold independent of input line variation. Use Value: Enables ±1% output accuracy over temperature due to low ZZ and known γZ, reducing need for trimming resistors. |
Use Scenario: Protecting microcontroller I/O pins from ESD or inductive kickback in motor drive interface boards. IC Role / Device Role / Timing Role: Acts as shunt limiter, clamping transient voltages above 3.83 V before they reach sensitive CMOS inputs. Use Value: Absorbs 400 W surges (10 μs) without degradation, eliminating need for additional TVS arrays in cost-sensitive designs. |
| Waveform Clipper for Signal Conditioning | Constant-Current Bias Generator |
Use Scenario: Limiting audio signal peaks in analog preamplifier stages to prevent ADC saturation. IC Role / Device Role / Timing Role: Biased in reverse breakdown to clip positive excursions beyond 3.83 V while passing negative half-cycles. Use Value: Delivers symmetrical clipping with <60 Ω dynamic impedance, minimizing harmonic distortion vs. resistor-diode limiters. |
Use Scenario: Setting stable bias current for LED driver or op-amp input stage using simple two-resistor network. IC Role / Device Role / Timing Role: Maintains fixed 3.6 V across series resistor to generate temperature-compensated current source. Use Value: Achieves <±5% current stability from −40°C to +85°C via matched γZ and resistor TC selection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor 1N4728A | 3.3 V nominal (±5%), ZZ = 10 Ω @ 76 mA, γZ = −2 mV/°C - lower VZ, tighter ZZ, but wider tolerance | Suitable for lower-voltage references where 0.3 V margin suffices; not interchangeable in 3.6 V feedback loops without resistor recalibration | Select when absolute minimum ZZ is critical and 3.3 V regulation is acceptable |
| Vishay 1N5226B | 3.3 V nominal (±5%), ZZ = 25 Ω @ 20 mA, γZ = −2.5 mV/°C - same tempco, lower test current, higher ZZ | Compatible in low-current bias networks (<10 mA), but insufficient for 40 mA feedback paths requiring <60 Ω impedance | Choose for space-constrained designs needing DO-35 package; verify IZ derating in target circuit |
Compared with RD3.6F, 1N4728A offers lower dynamic impedance but requires circuit redesign for its 3.3 V rating, while 1N5226B matches the temperature coefficient but lacks the 40 mA/60 Ω performance needed for high-precision regulation - making RD3.6F optimal for 3.6 V, 1 W, industrial-grade reference applications.
Availability
RD3.6F is available at Aetrix Electronics and suitable for power supply feedback reference, overvoltage clamp circuit, and waveform clipper circuit requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for RD3.6F 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 merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and discrete power devices.
RD3.6F belongs to the RD2.0F–RD82F planar Zener diode family, engineered for standardized voltage reference and surge protection in industrial, computing, and consumer electronics - aligned with Renesas' "Standard" quality grade.
FAQ
What is the exact zener voltage tolerance for RD3.6F?
The RD3.6F is offered in B2 grade with a guaranteed zener voltage range of 3.58 V to 3.83 V at IZ = 40 mA and TA = 25°C. This ±3.5% tolerance is tighter than generic Zeners and is validated per the D13936EJ5V0DS datasheet. The RD3.6F's specified test condition (40 ms after power-on) ensures consistency in production testing. No derating or extrapolation is required - the RD3.6F delivers this range as shipped.
Does RD3.6F support surge protection, and what is its peak pulse rating?
Yes, RD3.6F supports transient suppression with a surge reverse power rating (PRSM) of 400 W for pulse width t = 10 μs at TA = 25°C, as defined in Figure 7 of the datasheet. This capability allows the RD3.6F to absorb short-duration overvoltages - such as ESD or inductive spikes - without permanent degradation. The RD3.6F must be used within its 1 W steady-state limit; repeated surges require thermal recovery time between events.
What is the thermal resistance and derating behavior of RD3.6F?
RD3.6F has a junction-to-ambient thermal resistance (RthJA) that varies with PCB copper area (Figure 2): e.g., ~200°C/W with 5 mm² foil, ~120°C/W with 20 mm². Its power dissipation derates linearly above 25°C - dropping to zero at ~150°C ambient (per Figure 1). This means RD3.6F can sustain full 1 W only below 25°C; at 70°C ambient, max power drops to ~0.65 W. The RD3.6F's 175°C max junction temperature sets the absolute thermal ceiling.
Is RD3.6F RoHS compliant and lead-free?
Yes, RD3.6F meets EU RoHS Directive requirements for restricted substances, as confirmed by Renesas Electronics' environmental compliance documentation. The device uses lead-free glass encapsulation and matte tin-plated leads, fully compatible with Pb-free reflow soldering profiles. Renesas specifies RD3.6F as "lead-free" in its packaging data, and no exemptions apply. For full material declarations, refer to Renesas' official product change notices - not third-party summaries - for RD3.6F.
Can RD3.6F be used in automotive applications?
RD3.6F is rated as "Standard" quality grade per Renesas' classification (Section 7 of datasheet), intended for computers, office equipment, and industrial robots - not automotive safety systems. While it operates from −65°C to +175°C, it lacks AEC-Q101 qualification, PPAP documentation, or guaranteed automotive-lifecycle screening. For under-hood use, RD3.6F may function electrically but does not meet OEM automotive reliability requirements. Use only in non-safety-critical, non-motor-control subsystems if approved by your design authority - RD3.6F is not automotive-qualified.
RD3.6F 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:
- -
RD3.6F FAQ
1.How can I place an order for RD3.6F through Aetrix?
Please submit a Request for Quotation (RFQ) for RD3.6F 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 RD3.6F reliable?
The price and inventory of RD3.6F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RD3.6F is usually 5 days.
3.What payment methods are accepted for RD3.6F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD3.6F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD3.6F?
RD3.6F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD3.6F 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 RD3.6F?
For technical support, including RD3.6F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD3.6F requirements.
6.How does Aetrix verify that RD3.6F is sourced from the original manufacturer or authorized distributors?
All RD3.6F 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 RD3.6F meets industry standards.
7.What is the process for return or replacement of RD3.6F?
All RD3.6F units undergo pre-shipment inspection (PSI). If there is an issue with RD3.6F, 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 RD3.6F part is unused and in its original packaging.
Return procedure for RD3.6F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD3.6F Tags
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MM5Z5V1ST1G
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