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Renesas RD9.1JS-T1-AZ
- Part No.:
- RD9.1JS-T1-AZ
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD9.1JS-T1-AZ.pdf
- Description:
- DIODE ZENER
- Quantity:
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Inventory:11,000
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Product details
Overview
RD9.1JS-T1-AZ from Renesas Electronics is a 400 mW DO-34 glass-sealed Zener diode with nominal zener voltage 9.1 V (±5% tolerance), dynamic impedance ≤15 Ω at 5 mA, reverse current ≤0.5 µA at 6.0 V, and maximum junction temperature of 175 °C. It serves as a precision voltage reference or waveform clipper in low-noise analog signal conditioning circuits.
For engineers reviewing the RD9.1JS-T1-AZ datasheet, RD9.1JS-T1-AZ pinout, RD9.1JS-T1-AZ application, or RD9.1JS-T1-AZ equivalent, this page delivers verified electrical specs, thermal behavior, package dimensions, and real-world use cases for stable voltage regulation in industrial and consumer electronics.
Technical Context
The RD9.1JS-T1-AZ operates in reverse breakdown mode with sharp knee characteristics and low noise-critical for reference stability in power supply feedback loops and sensor biasing. Its DHD (Double Heatsink Diode) construction enables 400 mW continuous dissipation at 25 °C ambient, derating linearly to zero at 175 °C junction temperature.
It exhibits a positive zener voltage temperature coefficient (+0.05 %/°C typical at 9.1 V), low dynamic impedance (Zz ≤15 Ω), and knee impedance (Zzk ≤100 Ω), supporting accurate regulation under varying load and temperature conditions without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage Vz | 8.56–9.55 V at 5 mA; ensures ±5% tolerance band for reliable voltage clamping in 9 V rail monitoring. |
| Power Dissipation P | 400 mW at TA = 25 °C; supports sustained operation in compact PCB layouts with minimal heatsinking. |
| Dynamic Impedance Zz | ≤15 Ω at Iz = 5 mA; minimizes output voltage variation under load transients in reference circuits. |
| Reverse Current IR | ≤0.5 µA at VR = 6.0 V; guarantees high off-state impedance for low-leakage bias networks. |
| Junction Temperature Tj | 175 °C max; allows deployment in thermally demanding environments like enclosed power supplies. |
| Surge Power PRSM | 2.4 W for t = 10 µs; withstands brief overvoltage events without degradation in protection circuits. |
| Package | DO-34 (JEDEC); 2.4 mm body length, axial leads-compatible with standard through-hole assembly and wave soldering. |
Pinout & Package
DO-34 glass-sealed axial package: cathode indicated by blue band; anode and cathode terminals only. No internal multi-pin structure-two-terminal device.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node | Connected to circuit common or lower-potential node; defines polarity for reverse-bias operation. |
| Cathode | Zener breakdown terminal / Voltage clamp node | Marked with blue band; connected to regulated node or input side of shunt regulator; carries controlled reverse current. |
Key Features
| Feature | Design Value |
|---|---|
| Low noise performance | en ≤ 50 µV (10–500 kHz); preserves SNR in audio preamps and precision ADC references. |
| Sharp breakdown knee | Zzk ≤ 100 Ω; enables clean transition into regulation-reduces ambiguity in threshold detection circuits. |
| DHD construction | Enhanced thermal path via double heatsink geometry; improves reliability under pulsed power stress. |
| E24-standard Vz grading | Vz values aligned to E24 series (±5%); simplifies BOM consolidation across 9 V-class Zener applications. |
Applications
| Industrial Power Supply Feedback | Audio Signal Clipping |
|---|---|
Use Scenario: Shunt regulation in isolated flyback converter feedback loop using optocoupler-coupled TL431 alternative. IC Role / Device Role / Timing Role: Voltage reference and error-sensing element replacing higher-complexity ICs in cost-sensitive AC/DC adapters. Use Value: Delivers ±5% output voltage accuracy with <15 Ω dynamic impedance, reducing component count versus three-terminal regulators. | Use Scenario: Symmetrical soft-clipping stage in guitar effects pedal input buffer. IC Role / Device Role / Timing Role: Bidirectional waveform limiter protecting op-amp inputs from overdrive while preserving harmonic character. Use Value: Low-noise (<50 µV) and sharp knee behavior yield clean distortion onset-no added hiss or compression artifacts. |
| Sensor Biasing Network | Overvoltage Protection Clamp |
Use Scenario: Stable 9.1 V bias for bridge-based pressure transducers in HVAC control modules. IC Role / Device Role / Timing Role: Precision excitation source ensuring consistent bridge output scaling across temperature. Use Value: +0.05 %/°C tempco and 175 °C max Tj enable drift <±10 mV over –40 to +125 °C operating range. | Use Scenario: Input-stage transient clamp on 12 V automotive accessory line exposed to load-dump spikes. IC Role / Device Role / Timing Role: First-line passive protection element absorbing 2.4 W surges for 10 µs per IEC 61000-4-5. Use Value: Fast response and robust surge rating prevent downstream TVS overstress and extend system-level ESD immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4739A | 9.1 V nominal, 1 W rating, DO-41 package, Zz ≈ 10 Ω at 20 mA | Higher power handling but larger footprint; requires layout change | Choose when >400 mW continuous dissipation is needed and board space permits DO-41. |
| BZX55-C9V1 | 9.1 V nominal, 500 mW rating, DO-35 package, Zz ≈ 15 Ω at 5 mA, RoHS-compliant | Same electrical performance, smaller DO-35 body (1.8 mm), different marking and thermal profile | Choose for RoHS compliance and tighter board spacing where DO-34 mechanical fit is not mandatory. |
Compared with RD9.1JS-T1-AZ, the 1N4739A offers higher power margin but demands PCB redesign, while the BZX55-C9V1 matches key electricals in a smaller, RoHS-compliant package-making it ideal for new designs prioritizing environmental compliance and miniaturization.
Availability
RD9.1JS-T1-AZ is available at Aetrix Electronics and suitable for industrial power supplies, audio signal processing, sensor excitation, and overvoltage protection circuits requiring stable component supply and long-term obsolescence management.
Supply support for RD9.1JS-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 through the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power devices.
The RDx.JS series was designed for general-purpose voltage regulation and waveform shaping in Standard-grade applications-including office equipment, consumer electronics, and industrial controls-emphasizing low noise, sharp breakdown, and DO-34 manufacturability.
FAQ
What is the exact zener voltage tolerance for RD9.1JS-T1-AZ?
The RD9.1JS-T1-AZ has a nominal zener voltage of 9.1 V with a guaranteed range of 8.56 V to 9.55 V at 5 mA test current, corresponding to ±5% tolerance per E24 standard grading. This tolerance is confirmed in the official Renesas datasheet D13937EJ5V0DS00, Table on page 2, for suffix AB1/AB2/AB3 variants under the RD9.1JS designation.
Does RD9.1JS-T1-AZ support surface-mount assembly?
No, RD9.1JS-T1-AZ uses a DO-34 axial glass package with leaded terminations and is intended for through-hole mounting only. It lacks SMD-compatible geometry or tape-and-reel packaging-Renesas does not list any SMT variant of RD9.1JS-T1-AZ in its documentation or product family roadmap.
What is the maximum allowable reverse surge power for RD9.1JS-T1-AZ?
The RD9.1JS-T1-AZ supports a non-repetitive surge reverse power of 2.4 W for pulse width t = 10 µs, as specified in Figure 9 of the Renesas datasheet D13937EJ5V0DS00. This rating applies only to single-event transients; repetitive surges require derating based on thermal time constants shown in Figure 10.
Is RD9.1JS-T1-AZ RoHS compliant?
Yes, RD9.1JS-T1-AZ is RoHS compliant. Renesas confirms environmental compliance for the RDx.JS series in its corporate environmental statements and product change notices, aligning with EU Directive 2011/65/EU. The "-T1-AZ" suffix denotes tape-and-reel packaging and lead-free termination per J-STD-609.
How does the temperature coefficient affect RD9.1JS-T1-AZ in precision applications?
The RD9.1JS-T1-AZ exhibits a positive zener voltage temperature coefficient of approximately +0.05 %/°C (or +4.6 mV/°C) near 9.1 V, as shown in Figure 6 of the datasheet. In precision applications, this means Vz increases ~0.46 V over a 100 °C rise-designers must compensate via circuit topology (e.g., complementary diode pairing) or select tighter-tolerance units if drift <±20 mV is required.
RD9.1JS-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:
- -
RD9.1JS-T1-AZ FAQ
1.How can I place an order for RD9.1JS-T1-AZ through Aetrix?
Please submit a Request for Quotation (RFQ) for RD9.1JS-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 RD9.1JS-T1-AZ reliable?
The price and inventory of RD9.1JS-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 RD9.1JS-T1-AZ is usually 5 days.
3.What payment methods are accepted for RD9.1JS-T1-AZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD9.1JS-T1-AZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD9.1JS-T1-AZ?
RD9.1JS-T1-AZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD9.1JS-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 RD9.1JS-T1-AZ?
For technical support, including RD9.1JS-T1-AZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD9.1JS-T1-AZ requirements.
6.How does Aetrix verify that RD9.1JS-T1-AZ is sourced from the original manufacturer or authorized distributors?
All RD9.1JS-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 RD9.1JS-T1-AZ meets industry standards.
7.What is the process for return or replacement of RD9.1JS-T1-AZ?
All RD9.1JS-T1-AZ units undergo pre-shipment inspection (PSI). If there is an issue with RD9.1JS-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 RD9.1JS-T1-AZ part is unused and in its original packaging.
Return procedure for RD9.1JS-T1-AZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD9.1JS-T1-AZ Tags
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