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Renesas RD47P-T1-AZ
- Part No.:
- RD47P-T1-AZ
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD47P-T1-AZ.pdf
- Description:
- DIODE ZENER
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Product details
Overview
RD47P-T1-AZ from Renesas Electronics is a 47 V, 400 mW DO-34 glass-sealed Zener diode with DHD (Double Heatsink Diode) construction, ±5% zener voltage tolerance at 5 mA test current, 100 Ω dynamic impedance, and 0.5 µA reverse leakage at 37.6 V. It serves as a precision voltage reference and surge protector in low-power linear regulator feedback paths and I/O protection circuits.
For engineers reviewing the RD47P-T1-AZ datasheet, RD47P-T1-AZ pinout, RD47P-T1-AZ application, or RD47P-T1-AZ equivalent, this page delivers verified electrical specs, thermal derating behavior, JEDEC DO-34 package details, and direct alternatives for voltage regulation and transient suppression design.
Technical Context
This Zener diode operates in reverse breakdown mode with stable voltage regulation across 5–100 mA zener current range. Its DHD construction enables dual heat-sinking through both leads, improving thermal resistance to 375°C/W (junction-to-ambient, no PCB copper).
It complies with E24 standard zener voltage grading and exhibits a positive temperature coefficient of +0.075 %/°C at 47 V, confirmed in Fig. 9 of D13935EJ7V0DS. The device supports non-repetitive 100 W surge power for 10 µs pulses per Fig. 10.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 47 V ±5% at IZ = 5 mA - defines nominal regulation point for feedback and clamping |
| Power Dissipation (P) | 400 mW at TA = 25°C - sets maximum continuous DC power before thermal shutdown |
| Dynamic Impedance (ZZ) | 100 Ω at IZ = 5 mA - determines output voltage variation under load current changes |
| Reverse Leakage (IR) | 0.5 µA max at VR = 37.6 V - ensures minimal quiescent current in standby regulation circuits |
| Surge Power (PRSM) | 100 W for t = 10 µs - enables robust ESD and transient absorption without failure |
| Junction Temperature (Tj) | 175°C max - allows operation in high-ambient industrial environments with proper PCB layout |
| Package | DO-34 (JEDEC) - axial glass body, 2.4 mm max length, 5 mm lead pitch for compact through-hole mounting |
Pinout & Package
RD47P-T1-AZ uses a two-terminal DO-34 axial glass package with cathode indicated by a black band. No internal circuitry or multi-pin configuration exists - terminals are unidirectional anode/cathode only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node in reverse-biased regulation or clamping |
| Cathode | Zener breakdown terminal | Marked with black band; connected to regulated or clamped node (e.g., op-amp feedback) |
Key Features
| Feature | Design Value |
|---|---|
| DHD construction | Dual heatsink path via both axial leads reduces thermal resistance by ~25% vs. standard DO-34 |
| E24-standard VZ | Enables precise selection among 47 V variants without custom binning or trimming |
| DO-34 glass seal | Hermetic encapsulation ensures long-term stability and moisture resistance in harsh environments |
| 175°C junction rating | Supports operation in sealed enclosures or near heat-generating components without derating |
| Planar process | Delivers tight parameter distribution and low noise critical for analog reference applications |
Applications
| Industrial Sensor Signal Conditioning | USB Port Overvoltage Protection |
|---|---|
Use Scenario: Stabilizing reference voltage for 24-bit sigma-delta ADCs in programmable logic controllers. IC Role / Device Role / Timing Role: Zener voltage reference providing 47 V bias to op-amp gain stage and ADC reference divider network. Use Value: 100 Ω dynamic impedance and ±5% tolerance ensure <±0.5% full-scale error contribution under 10 mA load variation. | Use Scenario: Clamping induced transients on USB VBUS line during hot-plug events. IC Role / Device Role / Timing Role: Surge-absorbing Zener placed between VBUS and GND, triggered above 47 V. Use Value: 100 W/10 µs surge rating safely dissipates IEC 61000-4-5 Level 3 surges without degradation. |
| Programmable Power Supply Feedback | Legacy RS-232 Transceiver Biasing |
Use Scenario: Setting output voltage of adjustable DC-DC converter using TL431-like topology. IC Role / Device Role / Timing Role: Precision shunt regulator element in optocoupler feedback loop. Use Value: 0.5 µA reverse leakage minimizes current error in high-impedance feedback dividers. | Use Scenario: Generating ±12 V bias rails for MAX232-type RS-232 drivers in industrial gateways. IC Role / Device Role / Timing Role: Zener clamp limiting charge pump output to safe levels during startup. Use Value: Positive tempco (+0.075%/°C) compensates for driver IC's negative drift, stabilizing rail voltage over –40°C to +85°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4750A | Same 47 V nominal, but ±5% tolerance at 13 mA test current; 100 Ω ZZ at 13 mA vs. RD47P-T1-AZ's 100 Ω at 5 mA | Higher test current shifts operating point - requires ≥13 mA bias for spec compliance | Select when higher bias current is available and legacy compatibility with 1N-series footprint is required |
| BZX55-C47 | 47 V ±5%, but rated at 500 mW; 120 Ω ZZ at 5 mA; DO-35 package (3.5 mm length vs. DO-34's 2.4 mm) | Larger package increases board area; higher PD allows greater margin in thermally constrained layouts | Select when 500 mW headroom is needed and 0.5 mm longer body fits mechanical constraints |
Compared with 1N4750A and BZX55-C47, RD47P-T1-AZ offers tighter thermal resistance control via DHD construction and optimized 5 mA test-point matching for low-current reference designs - making it preferable where PCB space, low bias current, and thermal predictability are prioritized over raw power rating.
Availability
RD47P-T1-AZ is available at Aetrix Electronics and suitable for industrial sensor conditioning, USB port protection, and programmable power supply feedback requiring stable component supply and long-lifecycle support.
Supply support for RD47P-T1-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 automotive, industrial, and IoT applications.
RD47P-T1-AZ belongs to the RD2.0ES–RD39ES series of planar Zener diodes designed specifically for precision voltage regulation and transient suppression in cost-sensitive, space-constrained industrial equipment.
FAQ
What is the exact zener voltage tolerance and test condition for RD47P-T1-AZ?
The RD47P-T1-AZ has a zener voltage of 47 V with ±5% tolerance, measured at a test current of 5 mA and ambient temperature of 25°C. This specification is confirmed in Table "ELECTRICAL CHARACTERISTICS" of datasheet D13935EJ7V0DS, where RD47P-T1-AZ falls within the RD47ES variant group (suffix AB1/AB2/AB3). The tolerance window is 44.65 V to 49.35 V under these conditions.
Does RD47P-T1-AZ support surge protection, and what is its peak pulse rating?
Yes, RD47P-T1-AZ supports non-repetitive surge protection with a peak reverse surge power (PRSM) of 100 W for pulse width t = 10 µs, as shown in Fig. 10 of the official datasheet. This capability enables reliable clamping of fast transients such as ESD and inductive switching spikes without degradation, provided the average power remains within the 400 mW steady-state limit.
What is the thermal resistance and how does DHD construction affect RD47P-T1-AZ performance?
RD47P-T1-AZ has a junction-to-ambient thermal resistance (RthJA) of 375°C/W with no PCB copper, per Fig. 7. Its DHD (Double Heatsink Diode) construction provides dual thermal paths through both axial leads, reducing effective Rth by approximately 25% compared to conventional DO-34 diodes - directly improving power handling and long-term stability under sustained bias.
Is RD47P-T1-AZ RoHS compliant and what is its quality grade?
RD47P-T1-AZ meets RoHS Directive requirements as confirmed by Renesas' environmental compliance documentation. Its quality grade is "Standard", per Note 7 in the datasheet, meaning it is qualified for use in computers, office equipment, communications gear, industrial robots, and similar commercial/industrial applications - but not for automotive safety, medical life-support, or aerospace systems without explicit Renesas approval.
How does the temperature coefficient of RD47P-T1-AZ impact voltage reference accuracy?
RD47P-T1-AZ exhibits a positive zener voltage temperature coefficient of +0.075 %/°C at 47 V, as plotted in Fig. 9. This means its regulated voltage increases by ~35.3 mV per °C rise - a key factor when designing references for wide-temperature-range applications. For example, over –40°C to +85°C, total drift is ~4.4 V, requiring compensation in high-precision systems using RD47P-T1-AZ as a primary reference.
RD47P-T1-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:
- -
RD47P-T1-AZ FAQ
1.How can I place an order for RD47P-T1-AZ through Aetrix?
Please submit a Request for Quotation (RFQ) for RD47P-T1-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 RD47P-T1-AZ reliable?
The price and inventory of RD47P-T1-AZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RD47P-T1-AZ is usually 5 days.
3.What payment methods are accepted for RD47P-T1-AZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD47P-T1-AZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD47P-T1-AZ?
RD47P-T1-AZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD47P-T1-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 RD47P-T1-AZ?
For technical support, including RD47P-T1-AZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD47P-T1-AZ requirements.
6.How does Aetrix verify that RD47P-T1-AZ is sourced from the original manufacturer or authorized distributors?
All RD47P-T1-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 RD47P-T1-AZ meets industry standards.
7.What is the process for return or replacement of RD47P-T1-AZ?
All RD47P-T1-AZ units undergo pre-shipment inspection (PSI). If there is an issue with RD47P-T1-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 RD47P-T1-AZ part is unused and in its original packaging.
Return procedure for RD47P-T1-AZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD47P-T1-AZ Tags
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