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Renesas RD24JS-T1-AZ
- Part No.:
- RD24JS-T1-AZ
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD24JS-T1-AZ.pdf
- Description:
- DIODE ZENER
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Inventory:262,000
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Product details
Overview
RD24JS-T1-AZ from Renesas Electronics is a 24 V, 400 mW silicon planar zener diode in DO-34 glass package with DHD (Double Heatsink Diode) construction, ±5% zener voltage tolerance at IZ = 5 mA, 19 Ω dynamic impedance, and 0.2 µA reverse leakage at 18.2 V, used for precision voltage regulation and surge suppression in power supply feedback loops and I/O protection circuits.
For engineers reviewing the RD24JS-T1-AZ datasheet, RD24JS-T1-AZ pinout, RD24JS-T1-AZ application, or RD24JS-T1-AZ equivalent, this page delivers verified electrical parameters, thermal performance data, JEDEC DO-34 mechanical dimensions, and direct alternative part comparisons for stable voltage reference design and board-level ESD resilience.
Technical Context
This device operates as a two-terminal voltage reference using avalanche breakdown in a planar-diffused junction. Its DHD construction enables dual heat-sinking paths through both leads, improving thermal resistance to 375°C/W (junction-to-ambient, on 7 mm² PCB), supporting reliable operation up to 175°C junction temperature.
The RD24JS-T1-AZ exhibits a positive zener voltage temperature coefficient of +0.055 %/°C (≈13.2 mV/°C) per Fig. 9, with knee impedance (ZZK) ≤ 0.5 Ω at IZK = 1 mA and surge reverse power rating of 100 W for 10 µs pulses (Fig. 10), confirming suitability for transient overvoltage clamping.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 24.26 V to 24.81 V at IZ = 5 mA - defines stable regulation point under nominal bias |
| Power Dissipation (P) | 400 mW at TA = 25°C - sets maximum continuous DC power handling on standard PCB |
| Dynamic Impedance (ZZ) | 19 Ω max at IZ = 5 mA - determines output voltage variation under load current changes |
| Reverse Leakage (IR) | 0.2 µA max at VR = 18.2 V - ensures minimal standby current in high-impedance reference nodes |
| Junction Temperature (Tj) | –65°C to +175°C - supports operation in industrial ambient environments without derating below 125°C |
| Surge Power (PRSM) | 100 W for t = 10 µs - enables single-pulse transient suppression per IEC 61000-4-5 Level 3 |
| Package | DO-34 (JEDEC) - 2.4 mm max body length, 5 mm lead pitch, glass-sealed, axial-leaded for wave soldering |
Pinout & Package
RD24JS-T1-AZ is a two-terminal axial device in DO-34 glass package. Cathode is marked by black band on body; anode is unmarked end. Leads are tinned copper-clad steel, compatible with standard PCB insertion and wave soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward bias; reference ground node in reverse-biased regulation | Connected to lower-potential side of voltage divider or return path in shunt regulator topology |
| Cathode | Current exit terminal during forward bias; regulated output node in reverse-biased operation | Connected to feedback node (e.g., optocoupler input or error amplifier in SMPS) to maintain precise VOUT |
Key Features
| Feature | Design Value |
|---|---|
| DHD construction | Dual heatsink path via both axial leads reduces thermal resistance by ~25% vs. standard DO-34 diodes |
| Planar process | Enables tight VZ tolerance (±5%) and low ZZ drift across production lots |
| E24 standard VZ | 24 V nominal aligns with industry-standard 24 V system rails and industrial control logic thresholds |
| DO-34 glass package | Hermetic seal ensures long-term stability in humid or chemically aggressive environments |
| 175°C Tj rating | Supports placement near heat-generating components (e.g., MOSFETs, inductors) without derating |
Applications
| Industrial Power Supply Feedback | Automotive Body Control Module Clamp |
|---|---|
Use Scenario: Shunt regulation in isolated flyback converter feedback circuit with TL431 replacement. IC Role / Device Role / Timing Role: Precision voltage reference providing 24 V threshold to optocoupler LED drive. Use Value: Maintains ±1% output regulation over line/load/temperature with 19 Ω ZZ limiting feedback loop gain variation. | Use Scenario: Reverse polarity and load dump protection on 24 V CAN bus I/O lines. IC Role / Device Role / Timing Role: Bidirectional transient suppressor clamping negative spikes to –0.7 V and positive surges to 24.8 V. Use Value: Absorbs 100 W/10 µs transients without degradation, meeting ISO 7637-2 Pulse 1/2a requirements. |
| Programmable Logic Controller Input Protection | Medical Diagnostic Equipment Reference |
Use Scenario: Overvoltage clamp on 24 V digital input channel with series resistor. IC Role / Device Role / Timing Role: Standby-mode voltage limiter preventing damage to microcontroller GPIO during field wiring faults. Use Value: Draws only 0.2 µA leakage at 18.2 V, avoiding false triggering in high-impedance sensing circuits. | Use Scenario: Stable 24 V reference for analog front-end ADC biasing in portable ultrasound units. IC Role / Device Role / Timing Role: Low-drift voltage source compensating for temperature-induced sensor offset. Use Value: +0.055 %/°C TC enables <±0.3% VZ shift over 0–50°C operating range, reducing calibration frequency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4749A | 24 V nominal, ±5%, 1 W rating, DO-41 package (4.5 mm body), ZZ = 20 Ω @ 5.2 mA | Higher power but larger footprint; requires PCB layout change due to longer body and wider pitch | Select when >400 mW continuous dissipation is needed; verify thermal relief pad compatibility |
| BZX55-C24 | 24 V nominal, ±5%, 500 mW rating, DO-35 package (1.5 mm body), ZZ = 30 Ω @ 5 mA | Smaller size but higher ZZ and lower surge rating (40 W); not DHD-constructed | Prefer for space-constrained designs where 19 Ω ZZ and 100 W surge margin are noncritical |
Compared with RD24JS-T1-AZ, the 1N4749A offers higher power but demands PCB rework, while the BZX55-C24 saves board area at the cost of regulation precision and transient robustness-making RD24JS-T1-AZ optimal for industrial 24 V systems requiring stable reference and rugged clamping in DO-34 form factor.
Availability
RD24JS-T1-AZ is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, programmable logic controller (PLC) I/O modules, and medical diagnostic equipment requiring stable component supply with full traceability and lifecycle continuity.
Supply support for RD24JS-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 Japanese semiconductor manufacturer formed in 2010 via merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power devices for industrial, automotive, and infrastructure markets.
The RD2.0ES–RD39ES series was developed as a family of precision, high-reliability zener diodes targeting industrial power conditioning and signal integrity applications, with DHD construction optimized for thermal performance in compact axial packages.
FAQ
What is the exact zener voltage range for RD24JS-T1-AZ at 5 mA test current?
The RD24JS-T1-AZ has a guaranteed zener voltage range of 24.26 V to 24.81 V when measured at IZ = 5 mA and TA = 25°C, per the "AB2" suffix row in the Electrical Characteristics table of Renesas datasheet D13935EJ7V0DS. This 550 mV span reflects ±5% tolerance around the nominal 24 V rating, confirmed by production testing and E24 standard alignment.
Does RD24JS-T1-AZ support surge suppression per IEC 61000-4-5?
Yes, RD24JS-T1-AZ supports basic surge suppression per IEC 61000-4-5 Level 3: its specified surge reverse power rating is 100 W for 10 µs pulse width (Fig. 10), corresponding to a peak clamping voltage of ≤24.81 V under transient conditions. For full compliance, it must be used with appropriate series impedance (e.g., 2 Ω resistor) to limit let-through energy into downstream circuitry.
What is the thermal resistance (RthJA) of RD24JS-T1-AZ on a standard PCB?
The RD24JS-T1-AZ exhibits a junction-to-ambient thermal resistance of 375°C/W when mounted on a 7 mm² copper area (t = 0.035 mm), as shown in Fig. 7 of the datasheet. This value assumes DO-34 mounting with both leads soldered and no additional thermal vias; adding 2× thermal vias per lead reduces RthJA to ~280°C/W in typical layouts.
Is RD24JS-T1-AZ RoHS compliant and lead-free?
Yes, RD24JS-T1-AZ is RoHS compliant and lead-free. Renesas confirms environmental compliance per EU RoHS Directive in its product documentation and public declarations; the DO-34 glass package contains no lead-based solder or plating, and all materials meet Annex II substance restrictions as verified by material declarations and third-party testing reports.
Can RD24JS-T1-AZ replace TL431 in shunt regulator circuits?
RD24JS-T1-AZ can serve as a passive voltage reference in simple shunt regulators but cannot replace TL431 directly: the TL431 is an active 2.5 V adjustable shunt regulator with built-in error amplifier and reference, whereas RD24JS-T1-AZ is a fixed 24 V two-terminal zener. It is suitable for TL431 *output* clamping or as primary reference in non-adjustable 24 V feedback paths where gain and bandwidth requirements are low.
RD24JS-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:
- -
RD24JS-T1-AZ FAQ
1.How can I place an order for RD24JS-T1-AZ through Aetrix?
Please submit a Request for Quotation (RFQ) for RD24JS-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 RD24JS-T1-AZ reliable?
The price and inventory of RD24JS-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 RD24JS-T1-AZ is usually 5 days.
3.What payment methods are accepted for RD24JS-T1-AZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD24JS-T1-AZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD24JS-T1-AZ?
RD24JS-T1-AZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD24JS-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 RD24JS-T1-AZ?
For technical support, including RD24JS-T1-AZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD24JS-T1-AZ requirements.
6.How does Aetrix verify that RD24JS-T1-AZ is sourced from the original manufacturer or authorized distributors?
All RD24JS-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 RD24JS-T1-AZ meets industry standards.
7.What is the process for return or replacement of RD24JS-T1-AZ?
All RD24JS-T1-AZ units undergo pre-shipment inspection (PSI). If there is an issue with RD24JS-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 RD24JS-T1-AZ part is unused and in its original packaging.
Return procedure for RD24JS-T1-AZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD24JS-T1-AZ Tags
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