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Renesas RD13JS-AZ
- Part No.:
- RD13JS-AZ
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD13JS-AZ.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
RD13JS-AZ from Renesas Electronics is a 400 mW DO-34 glass-sealed Zener diode with nominal zener voltage 12.7 V (AB2 suffix), sharp breakdown characteristic, low noise, and E24-standard voltage tolerance. It operates as a precision voltage reference or shunt regulator in low-power analog circuits, power supply feedback paths, and waveform clippers.
For engineers reviewing the RD13JS-AZ datasheet, RD13JS-AZ pinout, RD13JS-AZ application, or RD13JS-AZ equivalent, key selection criteria include its 12.7 V ±4.2% zener voltage at 5 mA, 37 µA max reverse current at 10 V, 0.1 µA max leakage at VR = 10 V, and DO-34 package thermal resistance of 375 °C/W under standard PCB mounting.
Technical Context
The RD13JS-AZ implements a silicon planar Zener junction optimized for stable reverse-biased operation at low to medium currents (5–80 mA). Its sharp breakdown knee and low dynamic impedance (Zz = 15 Ω typical at Iz = 5 mA) support tight regulation in voltage-reference applications where load transients are moderate.
Designed for ambient temperatures up to +125 °C derated power dissipation, it features a junction temperature limit of 175 °C and storage range from –65 °C to +175 °C. The blue-marked cathode indicates polarity on the DO-34 glass body, and surge capability supports 2.4 W non-repetitive pulses (t = 10 µs).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage Vz | 12.7 V (AB2 suffix) at Iz = 5 mA - defines stable regulation point for reference or clamp circuits |
| Dynamic Impedance Zz | 15 Ω max at Iz = 5 mA - ensures minimal output voltage shift under load current variation |
| Reverse Current IR | 37 µA max at VR = 10 V - guarantees low standby leakage in battery-powered or high-impedance nodes |
| Power Dissipation P | 400 mW at TA = 25 °C - sets maximum continuous DC power handling on standard PCB |
| Junction Temp Tj | 175 °C - determines thermal design margin for enclosure or heatsink requirements |
| Surge Power PRSM | 2.4 W (t = 10 µs) - enables transient overvoltage suppression without failure |
| Package | DO-34 glass axial - provides hermetic sealing, low parasitic capacitance (<2 pF), and JEDEC-standard footprint |
Pinout & Package
DO-34 glass axial package: 2.4 mm max body length, 25° min lead angle, blue cathode band. Leads are tinned copper, suitable for wave or hand soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection | Connected to lower potential node; carries forward current up to 150 mA during transient conduction |
| Cathode | Zener regulation terminal / reference output | Marked with blue band; delivers stable voltage when reverse-biased above Vz; connects to regulated rail or error amplifier input |
Key Features
| Feature | Design Value |
|---|---|
| Low noise performance | en ≤ 30 µV/√Hz (f = 10–500 kHz) - minimizes added noise in precision analog references and sensor signal chains |
| Sharp breakdown knee | Zzk = 400 Ω max at Iz = 1 mA - enables clean transition into regulation, reducing ambiguity in threshold detection |
| E24-standard voltage grading | Vz tolerance ±4.2% (AB2) - simplifies BOM consolidation across 12 V-class reference designs |
| High surge robustness | PRSM = 2.4 W (10 µs pulse) - withstands common-mode transients in industrial I/O and power supply inputs |
| Wide temperature operation | Tstg = –65 to +175 °C - supports deployment in automotive under-hood, industrial control, and outdoor equipment |
Applications
| Power Supply Feedback | Overvoltage Clamp |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback or buck-derived DC-DC converters using optocoupler feedback. IC Role / Device Role / Timing Role: Zener reference providing precise 12.7 V threshold to TL431-like shunt controller or error amplifier input. Use Value: Enables ±1% output regulation accuracy with minimal external components and no active bias circuitry. | Use Scenario: Protecting microcontroller GPIO or ADC inputs from ESD or inductive kickback in motor drive interfaces. IC Role / Device Role / Timing Role: Shunt limiter clamping voltage to 13.96 V (Vz max) before damage threshold of downstream ICs. Use Value: Absorbs 2.4 W transient surges without degradation, eliminating need for TVS diodes in cost-sensitive designs. |
| Reference Voltage Source | Waveform Clipper |
Use Scenario: Generating stable bias for op-amp comparators, analog multiplexers, or sensor excitation circuits. IC Role / Device Role / Timing Role: Passive voltage reference delivering 12.7 V with <15 Ω dynamic impedance to maintain stability under varying load. Use Value: Replaces more expensive IC references where 1% initial accuracy and low drift over time suffice. | Use Scenario: Limiting AC signal amplitude in audio preamplifiers or test equipment front-ends. IC Role / Device Role / Timing Role: Bidirectional clipper (anode-to-ground + cathode-to-rail) shaping sine waves to ±12.7 V peaks. Use Value: Provides symmetrical clipping with sharp knee and low distortion due to low Zzk and minimal capacitance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4742A | 12 V nominal, 1 W rating, DO-41 package, Zz = 22 Ω at 21 mA | Higher power, larger footprint, higher leakage (5 µA at 9 V) | Choose when >400 mW continuous dissipation or higher surge margin is required; requires PCB layout change |
| BZX55-C12 | 12 V nominal, 500 mW, DO-35 package, Zz = 25 Ω at 5 mA, tighter tolerance (±5%) | Same power class but different package geometry and thermal profile (Rth ≈ 500 °C/W) | Prefer for legacy DO-35 footprints; verify thermal derating on target PCB due to higher Rth |
Compared with RD13JS-AZ, 1N4742A offers higher power and surge capacity but requires board rework, while BZX55-C12 matches power class but trades off thermal performance and noise for wider availability - both serve as functional alternatives where exact DO-34 form factor isn't mandatory.
Availability
RD13JS-AZ is available at Aetrix Electronics and suitable for power supply feedback, overvoltage protection, and precision reference applications requiring stable component supply, long-lifecycle support, and RoHS-compliant sourcing.
Supply support for RD13JS-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 manufacturer specializing in microcontrollers, analog, power, and timing solutions for industrial, automotive, and consumer systems.
The RD series Zener diodes were developed for general-purpose voltage regulation and clamping in Standard-grade applications including office equipment, communications gear, and industrial controls - emphasizing reliability, low noise, and JEDEC-standard packaging.
FAQ
What is the exact zener voltage tolerance for RD13JS-AZ?
The RD13JS-AZ uses the AB2 suffix, specifying a zener voltage range of 12.91 V to 13.49 V at 5 mA test current. This corresponds to a ±4.2% tolerance around the nominal 13.2 V center value, aligned with E24 standard resistor/voltage grading for simplified inventory management.
Can RD13JS-AZ be used in place of a 12 V Zener like 1N4742A?
RD13JS-AZ is not a direct replacement for 1N4742A due to its higher nominal voltage (13.2 V vs. 12 V), lower power rating (400 mW vs. 1 W), and DO-34 vs. DO-41 package. Substitution requires verifying circuit headroom, thermal layout, and regulation accuracy - RD13JS-AZ suits low-power 13 V references, not 12 V high-current rails.
What is the maximum reverse leakage current for RD13JS-AZ at 10 V?
The RD13JS-AZ exhibits a maximum reverse leakage current of 0.1 µA at VR = 10 V, per the "IR (µA) MAX." column in the Electrical Characteristics table. This ultra-low leakage supports use in high-impedance sensing nodes and battery-backed circuits where standby current must remain below 100 nA.
Does RD13JS-AZ meet RoHS requirements?
Yes, RD13JS-AZ complies with EU RoHS Directive requirements. Renesas Electronics confirms environmental compatibility for this device, and the DO-34 glass package contains no lead in solderable terminations - full compliance documentation is available through Renesas' official product environmental reports.
How does the thermal resistance of RD13JS-AZ affect PCB layout?
RD13JS-AZ has a junction-to-ambient thermal resistance of 375 °C/W on a standard 3 mm × 3 mm copper pad. To maintain Tj ≤ 175 °C at 400 mW dissipation, ambient temperature must stay below +75 °C - requiring either adequate copper area, airflow, or derating above 25 °C ambient per Fig. 5 in the datasheet.
RD13JS-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:
- -
RD13JS-AZ FAQ
1.How can I place an order for RD13JS-AZ through Aetrix?
Please submit a Request for Quotation (RFQ) for RD13JS-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 RD13JS-AZ reliable?
The price and inventory of RD13JS-AZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RD13JS-AZ is usually 5 days.
3.What payment methods are accepted for RD13JS-AZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD13JS-AZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD13JS-AZ?
RD13JS-AZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD13JS-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 RD13JS-AZ?
For technical support, including RD13JS-AZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD13JS-AZ requirements.
6.How does Aetrix verify that RD13JS-AZ is sourced from the original manufacturer or authorized distributors?
All RD13JS-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 RD13JS-AZ meets industry standards.
7.What is the process for return or replacement of RD13JS-AZ?
All RD13JS-AZ units undergo pre-shipment inspection (PSI). If there is an issue with RD13JS-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 RD13JS-AZ part is unused and in its original packaging.
Return procedure for RD13JS-AZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD13JS-AZ Tags
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