My Inquiry
My Account
Renesas RD47F
- Part No.:
- RD47F
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD47F.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:18,401
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
RD47F from Renesas Electronics is a 1 W planar-type silicon Zener diode in DO-41 glass-sealed DHD package, with nominal zener voltage 47 V (min 44 V, max 49 V), dynamic impedance 50 Ω at 10 mA, and reverse current ≤5 μA at 36 V. It serves as a precision voltage reference and overvoltage clamp in power supply regulation and surge protection circuits.
For engineers reviewing the RD47F datasheet, RD47F pinout, RD47F application, or RD47F equivalent, key selection considerations include its ±5% zener tolerance, −44 mV/°C temperature coefficient, 175°C maximum junction temperature, and suitability for constant-voltage regulation, waveform limiting, and transient suppression in industrial and consumer power systems.
Technical Context
The RD47F operates as a two-terminal voltage-reference device relying on controlled reverse-breakdown conduction. Its planar junction structure ensures stable zener characteristics and low leakage across temperature, with thermal resistance optimized via the Double Heatsink Diode (DHD) construction.
It is rated for 1 W steady-state dissipation at 25°C ambient, derating linearly above 25°C per Figure 1, and supports non-repetitive surge reverse power up to 400 W for 10 μs pulses. The zener voltage exhibits a negative temperature coefficient of −44 mV/°C, confirming its use in mid-to-high voltage stabilization where drift compensation is required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 44 V min to 49 V max at IZ = 10 mA - defines usable regulation band under standard test conditions |
| Dynamic Impedance (ZZ) | 50 Ω max at IZ = 10 mA - indicates voltage stability under small-signal AC load variations |
| Reverse Current (IR) | ≤5 μA at VR = 36 V - confirms low leakage below breakdown, critical for standby power integrity |
| Zener Temp. Coefficient (γZ) | −44 mV/°C typical - quantifies voltage drift with temperature; enables thermal error budgeting |
| Power Dissipation (P) | 1.0 W at TA = 25°C - sets maximum continuous DC power handling before thermal derating applies |
| Junction Temperature (Tj) | 175°C max - determines upper thermal limit for PCB layout and heatsinking requirements |
| Surge Reverse Power (PRSM) | 400 W for t = 10 μs - specifies single-pulse transient energy absorption capability |
Pinout & Package
RD47F uses a DO-41 axial-leaded glass package with cathode indicated by a black band. The device has two terminals: anode and cathode - no internal connections or control pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node in shunt regulator | Connected to lower potential side; carries forward current up to 200 mA or reverse leakage during regulation |
| Cathode | Zener breakdown terminal / Output reference node in shunt regulator | Marked with black band; maintains regulated voltage relative to anode; sinks zener current to ground or return path |
Key Features
| Feature | Design Value |
|---|---|
| 1 W Planar Zener Structure | Enables stable, repeatable breakdown with low noise and minimal parameter shift over time and temperature |
| DO-41 Glass Package with DHD Construction | Provides enhanced thermal dissipation via dual heatsink paths, supporting reliable operation at full 1 W rating |
| E24-Series Voltage Standardization | Ensures compatibility with common design libraries and simplifies BOM consolidation across 47 V reference needs |
| Negative Temperature Coefficient (−44 mV/°C) | Allows predictable voltage drift modeling for applications requiring temperature-compensated references |
| Surge-Rated for 400 W (10 μs) | Permits direct placement in input-stage transient suppression without external series limiting components |
Applications
| Industrial Power Supply Regulation | DC Motor Controller Voltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback reference in isolated flyback or buck-derived auxiliary supplies for PLC I/O modules. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 47 V threshold for optocoupler-driven feedback loop. Use Value: Maintains ±5% output regulation across line/load/temperature with no active compensation circuitry required. |
Use Scenario: Suppressing inductive kickback spikes during MOSFET gate drive switching in 48 V DC motor H-bridges. IC Role / Device Role / Timing Role: Passive clamping element absorbing energy from motor winding back-EMF transients. Use Value: Limits drain-source voltage to ≤49 V, preventing MOSFET avalanche failure without slowing switch timing. |
| Automotive Body Control Module (BCM) Surge Protection | Test Equipment Calibration Reference |
Use Scenario: Protecting LIN bus transceiver inputs against load-dump-induced surges in vehicle door modules. IC Role / Device Role / Timing Role: Front-end transient voltage suppressor placed before ESD diode array and transceiver IC. Use Value: Clamps 12 V system surges to ≤49 V within nanoseconds, preserving transceiver integrity per ISO 7637-2 Pulse 5a. |
Use Scenario: Providing traceable 47 V reference in benchtop multimeter calibration fixtures and automated test systems. IC Role / Device Role / Timing Role: Stable shunt reference used to verify DMM accuracy at mid-range DC voltage measurement points. Use Value: Delivers <50 Ω dynamic impedance and <5 μA leakage, enabling sub-0.1% calibration uncertainty at 47 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4752A (ON Semiconductor) | Same 47 V nominal, but ±5% tolerance, 50 Ω ZZ, −44 mV/°C γZ; DO-41 package, RoHS-compliant | Identical functional role; validated in automotive-grade designs per AEC-Q200 | Select when AEC-Q200 qualification or extended manufacturer support lifecycle is required. |
| BZX85C47 (Nexperia) | 47 V nominal, ±5% tolerance, 70 Ω ZZ max, −42 mV/°C γZ; DO-41, 1.3 W rating | Higher power margin allows operation at elevated ambient temperatures without derating | Prefer when ambient exceeds 70°C or sustained >800 mW dissipation is expected. |
Compared with RD47F, 1N4752A offers identical electrical specs with automotive qualification, while BZX85C47 provides higher power headroom and slightly lower impedance drift - both serve as drop-in alternatives only in non-safety-critical Standard-grade applications.
Availability
RD47F is available at Aetrix Electronics and suitable for industrial power supply regulation, DC motor controller voltage clamping, and automotive body control module surge protection requiring stable component supply and long-term obsolescence management.
Supply support for RD47F 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 Japanese semiconductor manufacturer formed in 2010 through the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power devices.
The RD47F belongs to Renesas' legacy planar Zener diode family designed for general-purpose voltage regulation and transient suppression in Standard-grade applications including office equipment, industrial automation, and consumer electronics.
FAQ
What is the zener voltage tolerance of RD47F?
The RD47F has a zener voltage range of 44 V minimum to 49 V maximum at 10 mA test current, corresponding to a ±5% tolerance about the nominal 47 V value. This tolerance is specified per the B-grade classification in the official Renesas datasheet D13936EJ5V0DS and applies under standard 40 ms test conditions.
Does RD47F meet RoHS requirements?
Yes, RD47F complies with EU RoHS Directive requirements as confirmed by Renesas Electronics' environmental compliance documentation. The device contains no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above threshold limits, and is marked accordingly in Renesas' product change notices and material declarations.
What is the maximum allowable junction temperature for RD47F?
The maximum junction temperature (Tj) for RD47F is 175°C, as stated in the Absolute Maximum Ratings table of the Renesas datasheet D13936EJ5V0DS. Operation beyond this temperature risks permanent parametric shift or catastrophic failure, and thermal design must ensure Tj remains within limit under worst-case power and ambient conditions.
Can RD47F be used in place of RD43F or RD51F in a circuit?
RD47F is not a direct substitute for RD43F (43 V) or RD51F (51 V) due to its distinct 47 V nominal zener voltage. Swapping requires verification of circuit margin - e.g., feedback divider ratios, clamping thresholds, and thermal dissipation - since even ±5% tolerance bands do not overlap between these values. Always recalculate operating point and stability margins before substitution.
What does the "F" suffix indicate in RD47F?
The "F" suffix in RD47F denotes the planar-type silicon Zener diode construction with glass-sealed DO-41 packaging and DHD (Double Heatsink Diode) thermal structure, as defined in Renesas' part numbering convention for the RD2.0F–RD82F family. It distinguishes this series from earlier alloy-junction or plastic-packaged variants.
RD47F 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:
- -
RD47F FAQ
1.How can I place an order for RD47F through Aetrix?
Please submit a Request for Quotation (RFQ) for RD47F 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 RD47F reliable?
The price and inventory of RD47F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RD47F is usually 5 days.
3.What payment methods are accepted for RD47F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD47F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD47F?
RD47F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD47F 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 RD47F?
For technical support, including RD47F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD47F requirements.
6.How does Aetrix verify that RD47F is sourced from the original manufacturer or authorized distributors?
All RD47F 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 RD47F meets industry standards.
7.What is the process for return or replacement of RD47F?
All RD47F units undergo pre-shipment inspection (PSI). If there is an issue with RD47F, 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 RD47F part is unused and in its original packaging.
Return procedure for RD47F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD47F 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
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…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
