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Renesas RD5.1JS-T4-AZ
- Part No.:
- RD5.1JS-T4-AZ
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD5.1JS-T4-AZ.pdf
- Description:
- DIODE ZENER
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Inventory:35,000
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Product details
Overview
RD5.1JS-T4-AZ from Renesas Electronics is a 5.1 V, 400 mW DO-34 glass-sealed Zener diode with DHD (Double Heatsink Diode) construction, ±5% zener voltage tolerance at 5 mA test current, 15 Ω dynamic impedance, and 1.5 µA reverse leakage at 3.8 V, used for precision voltage regulation in low-power analog circuits and ESD protection clamping.
For engineers reviewing the RD5.1JS-T4-AZ datasheet, RD5.1JS-T4-AZ pinout, RD5.1JS-T4-AZ application, or RD5.1JS-T4-AZ equivalent, this page delivers verified electrical specs, JEDEC DO-34 package details, thermal derating curves, knee impedance behavior, and direct alternative parts with documented parameter differences.
Technical Context
This Zener diode employs planar diffusion technology and DHD construction to achieve enhanced thermal dissipation in the compact DO-34 package. Its zener voltage is specified per E24 standard with tight 5 mA test current condition, and its dynamic impedance is measured using small-signal AC superimposed on DC bias.
The device exhibits a positive temperature coefficient above ~5 V, confirmed by Fig. 9 in D13935EJ7V0DS - RD5.1JS-T4-AZ shows +0.04 %/°C typical drift - and supports non-repetitive surge power up to 100 W for 10 µs pulses per Fig. 10.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.85–5.35 V at IZ = 5 mA; ensures stable reference within ±5% across production lot and temperature range. |
| Power Dissipation (P) | 400 mW at TA = 25°C; derates linearly to zero at 150°C ambient per Fig. 6 - requires board-level thermal design. |
| Dynamic Impedance (ZZ) | 15 Ω max at IZ = 5 mA; determines output voltage stability under load transients in regulation circuits. |
| Knee Impedance (ZZK) | 1200 Ω max at IZK = 0.5 mA; defines minimum usable current for effective clamping in low-current bias networks. |
| Reverse Leakage (IR) | 1.5 µA max at VR = 3.8 V; critical for low-power standby circuits where quiescent current must remain sub-µA. |
| Surge Power (PRSM) | 100 W for t = 10 µs (non-repetitive); enables transient overvoltage suppression without device failure. |
| Junction Temperature (Tj) | 175°C maximum; allows operation in high-ambient industrial environments when properly heatsinked via DHD structure. |
Pinout & Package
RD5.1JS-T4-AZ is housed in a DO-34 (JEDEC) glass-sealed axial package with cathode indicated by black band. The DHD construction provides dual thermal paths through both leads, improving power handling versus standard DO-34 diodes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node; forms reference return path in shunt regulator topology. |
| Cathode | Zener breakdown terminal / regulated output node | Connected to input supply rail; maintains stable 5.1 V relative to anode during reverse-bias operation. |
Key Features
| Feature | Design Value |
|---|---|
| DO-34 glass package | Enables 5 mm PCB pitch insertion and hermetic sealing for long-term reliability in humid environments. |
| DHD construction | Dual thermal sink paths reduce junction-to-ambient thermal resistance by ~25% vs. standard DO-34, supporting full 400 mW rating. |
| E24-standard VZ | Guarantees compatibility with industry-standard resistor and reference libraries for rapid BOM rationalization. |
| Low knee impedance | ZZK ≤ 1200 Ω at 0.5 mA enables effective clamping even in micro-power sensor biasing networks. |
| 175°C Tj rating | Supports deployment in under-hood automotive modules and industrial motor drives without derating penalties. |
Applications
| Reference Voltage Source | Overvoltage Clamp |
|---|---|
|
Use Scenario: Providing stable 5.1 V reference for ADC biasing and op-amp feedback networks in battery-powered IoT sensors. IC Role / Device Role / Timing Role: Shunt voltage reference maintaining <±1% accuracy across –40°C to +85°C ambient. Use Value: Eliminates need for active reference ICs, reducing BOM count and quiescent current by >90% in sub-100 µA systems. |
Use Scenario: Clamping induced transients on 5 V logic rails during hot-plug events in industrial PLC I/O modules. IC Role / Device Role / Timing Role: Fast-acting surge suppressor limiting rail voltage to ≤5.88 V peak during 10 µs spikes. Use Value: Prevents latch-up in downstream MCU GPIOs without adding TVS capacitance that would distort signal integrity. |
| Waveform Clipper | Constant Current Sink |
|
Use Scenario: Limiting audio signal peaks in analog front-end stages of professional microphone preamplifiers. IC Role / Device Role / Timing Role: Bidirectional clipping element symmetrically truncating ±5.1 V excursions on AC-coupled lines. Use Value: Delivers clean hard-clipping with <1 ns response time and no forward-conduction distortion below threshold. |
Use Scenario: Setting precise LED drive current in status indicator circuits using single-resistor bias configuration. IC Role / Device Role / Timing Role: Stable voltage reference establishing fixed VBE drop across series transistor base-emitter junction. Use Value: Achieves ±3% current regulation across input voltage variations from 6 V to 24 V with no active components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4733A | 5.1 V nominal, 1 W rating, DO-41 package, 17 Ω ZZ, 5 µA IR at 4 V | Higher power but larger footprint; less suitable for space-constrained PCBs requiring DO-34 form factor | Select RD5.1JS-T4-AZ when board area is limited and 400 mW suffices; choose 1N4733A only if thermal margin demands >1 W capability. |
| BZX55-C5V1 | 5.1 V nominal, 500 mW rating, DO-35 package, 60 Ω ZZ, 10 µA IR at 4 V | Higher dynamic impedance degrades regulation accuracy under load variation; DO-35 not compatible with DO-34 tooling | RD5.1JS-T4-AZ offers superior regulation stability and legacy assembly compatibility; BZX55-C5V1 may be used only if ZZ >50 Ω is acceptable. |
Compared with 1N4733A and BZX55-C5V1, RD5.1JS-T4-AZ delivers tighter voltage tolerance (±5% vs. ±5% but tighter distribution), lower ZZ, and DO-34 compatibility - making it optimal for high-density, thermally constrained designs where precision and footprint matter most.
Availability
RD5.1JS-T4-AZ is available at Aetrix Electronics and suitable for voltage reference, overvoltage protection, and waveform clipping applications requiring stable component supply, consistent parametric performance, and long-lifecycle availability in industrial control, test equipment, and consumer electronics.
Supply support for RD5.1JS-T4-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 SoC solutions for automotive, industrial, and enterprise applications.
RD5.1JS-T4-AZ belongs to the legacy NEC RD-series Zener diode family, designed specifically for high-reliability, low-power voltage regulation and transient suppression in cost-sensitive, space-constrained analog circuits.
FAQ
What is the exact zener voltage tolerance and test condition for RD5.1JS-T4-AZ?
The RD5.1JS-T4-AZ has a zener voltage range of 4.85 V to 5.35 V, corresponding to ±5% tolerance at IZ = 5 mA and TA = 25°C, as specified in the D13935EJ7V0DS datasheet Table on page 3. This tolerance remains valid across the full operating temperature range of –65°C to +175°C, with voltage drift characterized in Fig. 9.
Does RD5.1JS-T4-AZ support surge protection, and what are its pulse ratings?
Yes, RD5.1JS-T4-AZ supports non-repetitive surge suppression with a rated surge reverse power (PRSM) of 100 W for pulse width t = 10 µs, per Fig. 10 in the official datasheet. It is not rated for repetitive surges; designers must ensure adequate cooling and duty cycle limits to avoid cumulative thermal stress on the RD5.1JS-T4-AZ junction.
What is the thermal resistance and derating behavior of RD5.1JS-T4-AZ?
RD5.1JS-T4-AZ exhibits junction-to-ambient thermal resistance dependent on PCB copper area, ranging from ~375°C/W on minimal 3 mm² board to ~100°C/W on 100 mm² copper (Fig. 7). Its power dissipation derates linearly from 400 mW at 25°C ambient to 0 mW at 150°C, as shown in Fig. 6 - confirming safe operation up to 175°C junction temperature.
How does the DHD construction improve RD5.1JS-T4-AZ performance compared to standard DO-34 diodes?
The DHD (Double Heatsink Diode) construction in RD5.1JS-T4-AZ provides two parallel thermal conduction paths through both axial leads, reducing effective thermal resistance by approximately 25% versus conventional DO-34 Zeners. This allows RD5.1JS-T4-AZ to sustain its full 400 mW rating at higher ambient temperatures and improves long-term reliability under cyclic thermal stress.
Is RD5.1JS-T4-AZ RoHS compliant and what is its quality grade?
RD5.1JS-T4-AZ meets RoHS Directive requirements per Renesas' environmental compliance documentation. As a Standard-grade product per Note 7 in the datasheet, it is qualified for use in computers, office equipment, communications gear, audio/video devices, and industrial robots - but not for automotive safety-critical, medical life-support, or aerospace applications without explicit Renesas approval.
RD5.1JS-T4-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:
- -
RD5.1JS-T4-AZ FAQ
1.How can I place an order for RD5.1JS-T4-AZ through Aetrix?
Please submit a Request for Quotation (RFQ) for RD5.1JS-T4-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 RD5.1JS-T4-AZ reliable?
The price and inventory of RD5.1JS-T4-AZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RD5.1JS-T4-AZ is usually 5 days.
3.What payment methods are accepted for RD5.1JS-T4-AZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD5.1JS-T4-AZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD5.1JS-T4-AZ?
RD5.1JS-T4-AZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD5.1JS-T4-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 RD5.1JS-T4-AZ?
For technical support, including RD5.1JS-T4-AZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD5.1JS-T4-AZ requirements.
6.How does Aetrix verify that RD5.1JS-T4-AZ is sourced from the original manufacturer or authorized distributors?
All RD5.1JS-T4-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 RD5.1JS-T4-AZ meets industry standards.
7.What is the process for return or replacement of RD5.1JS-T4-AZ?
All RD5.1JS-T4-AZ units undergo pre-shipment inspection (PSI). If there is an issue with RD5.1JS-T4-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 RD5.1JS-T4-AZ part is unused and in its original packaging.
Return procedure for RD5.1JS-T4-AZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD5.1JS-T4-AZ Tags
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