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Renesas RD13JS
- Part No.:
- RD13JS
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD13JS.pdf
- Description:
- DIODE ZENER
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Inventory:19,000
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Product details
Overview
RD13JS from Renesas Electronics is a 400 mW, DO-34 glass-sealed Zener diode with nominal zener voltage 12.7 V (AB1), 13.2 V (AB2), or 13.7 V (AB3), sharp breakdown characteristic, low noise, and dynamic impedance ≤80 Ω at 5 mA - used for precision voltage reference and waveform clipping in analog signal conditioning circuits.
For engineers reviewing the RD13JS datasheet, RD13JS pinout, RD13JS application, or RD13JS equivalent, this page delivers verified electrical specs, thermal behavior, package dimensions, and real-world selection guidance for constant-voltage regulation, overvoltage protection, and reference design in industrial control and instrumentation systems.
Technical Context
The RD13JS operates as a two-terminal voltage-reference device relying on controlled reverse-biased avalanche breakdown. Its DHD (Double Heatsink Diode) construction in DO-34 improves thermal dissipation versus standard axial packages, enabling stable operation up to 175 °C junction temperature.
It exhibits a positive zener voltage temperature coefficient (γz ≈ +0.04 %/°C at 12–14 V range), low knee impedance (Zzk ≤ 10 Ω at 0.5 mA), and specified surge reverse power of 2.4 W for 10 µs pulses - confirming suitability for transient suppression in low-energy bias networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Vz) | 12.47–13.03 V (AB1), 12.91–13.49 V (AB2), 13.37–13.96 V (AB3) - tight tolerance enables ±3% regulation without trimming in 12 V reference rails. |
| Power Dissipation (P) | 400 mW at 25 °C ambient - defines maximum continuous DC power handling before thermal derating applies. |
| Dynamic Impedance (Zz) | ≤80 Ω at Iz = 5 mA - ensures minimal output voltage variation under load current changes in feedback references. |
| Reverse Current (IR) | ≤0.1 µA at VR = 10 V - guarantees negligible leakage in high-impedance bias networks and sample-hold circuits. |
| Surge Reverse Power (PRSM) | 2.4 W for t = 10 µs - supports transient clamping of ESD or inductive spikes without degradation. |
| Junction Temperature (Tj) | −65 to +175 °C - allows deployment in extended-temperature industrial environments without external heatsinking. |
| Noise Level (en) | ≈30 µV (10–500 kHz) - low enough for use in precision ADC reference buffers and sensor excitation circuits. |
Pinout & Package
RD13JS uses a DO-34 (JEDEC) axial glass package with cathode indicated by blue band. Body length ≤2.4 mm, diameter φ1.8–2.0 mm. No polarity-sensitive internal structure - terminals are anode and cathode only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node | Connected to circuit ground or lower-potential rail when used in reverse-biased zener mode. |
| Cathode | Zener breakdown terminal / Output reference node | Provides stable regulated voltage relative to anode; marked with blue band for identification. |
Key Features
| Feature | Design Value |
|---|---|
| DO-34 glass seal | Hermetic encapsulation ensures long-term stability and moisture resistance in humid environments. |
| Sharp breakdown characteristic | Low knee voltage (≤10 V) and steep I–V slope enable clean clamping and precise threshold detection. |
| Low noise performance | 30 µV RMS noise (10–500 kHz) supports use in high-resolution analog front-ends without added filtering. |
| DHD thermal construction | Enhanced heat transfer from junction to leads reduces thermal resistance, improving reliability at elevated ambient temperatures. |
| E24-standard Vz grading | Voltage bins align with EIA E24 series, simplifying BOM consolidation and cross-referencing across voltage grades. |
Applications
| Industrial Voltage Reference | Overvoltage Protection Clamp |
|---|---|
|
Use Scenario: Stable 12 V reference for 12-bit SAR ADC biasing in PLC analog input modules. IC Role / Device Role / Timing Role: Two-terminal shunt voltage reference providing fixed potential for op-amp feedback networks and DAC reference dividers. Use Value: Maintains ±0.3% output stability over −40 to +85 °C due to predictable γz and low Zz, eliminating need for active reference ICs. |
Use Scenario: Input-stage clamp protecting microcontroller GPIO pins from 15 V transients in factory automation sensors. IC Role / Device Role / Timing Role: Passive overvoltage limiter absorbing short-duration surges before they reach sensitive CMOS inputs. Use Value: Withstands 2.4 W/10 µs pulses and exhibits <0.1 µA leakage at 10 V, ensuring no signal distortion during normal operation. |
| Waveform Clipping Circuit | Constant-Current Bias Source |
|
Use Scenario: Symmetric ±12 V clipping in audio preamplifier limiting stages for distortion control. IC Role / Device Role / Timing Role: Dual-diode configuration (back-to-back RD13JS) defining hard clipping thresholds independent of supply rail variance. Use Value: Sharp breakdown and low Zz ensure consistent clipping level across unit-to-unit and temperature, critical for repeatable harmonic content. |
Use Scenario: LED driver bias current stabilization in optical encoder feedback circuits. IC Role / Device Role / Timing Role: Zener-based current source where RD13JS sets reference voltage across emitter resistor of PNP transistor. Use Value: 400 mW rating supports ≥20 mA bias current with margin; low noise avoids modulation of optical signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4742A (ON Semiconductor) | 12 V nominal, 1 W rating, DO-41 package, Zz = 9 Ω @ 21 mA - higher power but larger footprint and different thermal profile. | Preferred where higher surge energy absorption or longer pulse handling is required; unsuitable for space-constrained DO-34 layouts. | Select when board area permits larger package and >400 mW continuous dissipation is needed. |
| BZX55C12 (Vishay) | 12 V nominal, 500 mW, DO-35 package, Zz = 25 Ω @ 5 mA - slightly higher impedance and wider Vz tolerance (±5%). | Used in cost-sensitive consumer electronics where ±5% regulation is acceptable and DO-35 fits existing tooling. | Choose for legacy DO-35 assembly lines or where tighter Vz binning is not required. |
Compared with 1N4742A and BZX55C12, RD13JS offers superior noise performance and DO-34 compactness ideal for high-density industrial PCBs, while maintaining tighter Vz grading and lower leakage - making it optimal for precision analog and space-limited embedded systems.
Availability
RD13JS is available at Aetrix Electronics and suitable for industrial control systems, sensor signal conditioning, and analog reference design requiring stable component supply, long-lifecycle support, and RoHS-compliant discrete semiconductors.
Supply support for RD13JS 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 specializing in microcontrollers, analog, power, and timing solutions for industrial, automotive, and infrastructure markets.
The RD13JS belongs to the RDxJS family of low-noise, sharp-breakdown Zener diodes designed specifically for precision voltage regulation and waveform shaping in industrial instrumentation and control equipment.
FAQ
What is the nominal zener voltage range for RD13JS?
The RD13JS is offered in three suffix variants: AB1 (12.47–13.03 V), AB2 (12.91–13.49 V), and AB3 (13.37–13.96 V), all tested at 5 mA. These ranges reflect E24-standard grading and ensure predictable regulation within ±3% tolerance bands for stable reference design using RD13JS.
Can RD13JS be used in surface-mount designs?
No - RD13JS uses a through-hole DO-34 axial glass package with lead-forming requirements for radial mounting. It is not compatible with SMT reflow or pick-and-place processes. For SMT alternatives, consider Renesas' NSZ series or equivalent SOD-123 Zeners, not RD13JS.
What is the maximum allowable reverse current for RD13JS at 10 V?
At VR = 10 V, the reverse current IR for RD13JS is guaranteed ≤0.1 µA per the datasheet's Electrical Characteristics table. This ultra-low leakage supports high-impedance bias networks and prevents loading errors in precision reference circuits using RD13JS.
How does RD13JS handle thermal derating above 25 °C?
RD13JS follows a linear derating curve: power dissipation decreases from 400 mW at 25 °C to zero at 175 °C. Derating factor is ~3.33 mW/°C above 25 °C, per Fig. 5 (P-TA Rating). This must be applied in thermal design when using RD13JS in enclosed or high-ambient environments.
Is RD13JS suitable for automotive applications?
RD13JS is rated as "Standard" quality grade per Renesas documentation, intended for computers, office equipment, and industrial robots - not for automotive (High Quality) or safety-critical (Specific) applications. Use only in non-safety automotive subsystems after full qualification; RD13JS is not AEC-Q200 qualified.
RD13JS 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 FAQ
1.How can I place an order for RD13JS through Aetrix?
Please submit a Request for Quotation (RFQ) for RD13JS 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 reliable?
The price and inventory of RD13JS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RD13JS is usually 5 days.
3.What payment methods are accepted for RD13JS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD13JS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD13JS?
RD13JS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD13JS 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?
For technical support, including RD13JS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD13JS requirements.
6.How does Aetrix verify that RD13JS is sourced from the original manufacturer or authorized distributors?
All RD13JS 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 meets industry standards.
7.What is the process for return or replacement of RD13JS?
All RD13JS units undergo pre-shipment inspection (PSI). If there is an issue with RD13JS, 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 part is unused and in its original packaging.
Return procedure for RD13JS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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