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Renesas RD33JS-T1-AZ
- Part No.:
- RD33JS-T1-AZ
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD33JS-T1-AZ.pdf
- Description:
- DIODE ZENER
- Quantity:
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Inventory:8,000
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Product details
Overview
RD33JS-T1-AZ from Renesas Electronics is a 33 V, 400 mW DO-34 glass-sealed Zener diode with sharp breakdown characteristics, low noise (≤50 µV at 10–500 kHz), and ±3% zener voltage tolerance at 5 mA, used for precision voltage regulation in power supply reference circuits.
For engineers reviewing the RD33JS-T1-AZ datasheet, RD33JS-T1-AZ pinout, RD33JS-T1-AZ application, or RD33JS-T1-AZ equivalent, key selection criteria include zener voltage accuracy (32.18–34.83 V), dynamic impedance (≤250 Ω at 5 mA), thermal resistance (375 °C/W), and DO-34 package compatibility with through-hole PCB layouts.
Technical Context
This device operates as a two-terminal voltage reference using avalanche breakdown in silicon, optimized for stable DC regulation under reverse bias. Its DHD (Double Heatsink Diode) construction enables 400 mW continuous power dissipation at 25 °C ambient with derating to zero at 175 °C junction temperature.
The RD33JS-T1-AZ exhibits a positive zener voltage temperature coefficient (+0.06 %/°C typical at 33 V), low knee impedance (Zzk ≤ 250 Ω), and surge capability of 2.4 W for 10 µs pulses - enabling reliable operation in transient-prone power rails and analog reference nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Vz) | 32.18–34.83 V at 5 mA - defines tight regulation window for 33 V nominal reference designs |
| Power Dissipation (P) | 400 mW at TA = 25 °C - sets maximum steady-state heat load on PCB copper area |
| Dynamic Impedance (Zz) | ≤250 Ω at Iz = 5 mA - ensures minimal output voltage shift under load current variation |
| Reverse Current (IR) | ≤0.1 µA at VR = 25 V - guarantees low leakage in high-impedance bias networks |
| Noise Level (en) | ≤50 µV RMS (10–500 kHz) - supports low-noise analog references and sensor excitation |
| Junction Temp (Tj) | −65 to +175 °C - allows operation in industrial environments without active cooling |
| Package | DO-34 glass axial - compatible with legacy through-hole assembly and manual prototyping |
Pinout & Package
DO-34 glass axial package with cathode indicated by blue band; total length ≤2.4 mm, diameter ≤0.4 mm; leads are tinned copper alloy suitable for wave or hand soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node | Connected to circuit common; establishes reference potential when diode is reverse-biased |
| Cathode | Zener breakdown terminal / Regulated output node | Provides stable 33 V reference when reverse-biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| Sharp Breakdown Characteristic | Low knee impedance (Zzk ≤ 250 Ω) enables clean transition into regulation without soft rollover |
| Low Noise Performance | ≤50 µV RMS noise (10–500 kHz) preserves signal integrity in precision analog stages |
| DHD Construction | Double heatsink design improves thermal coupling to PCB, supporting full 400 mW rating with minimal copper area |
| E24 Standard Voltage | Vz conforms to IEC 60063 E24 series - simplifies BOM standardization across 33 V reference points |
| Surge Withstand | 2.4 W non-repetitive surge (10 µs) protects against inductive switching transients in power supplies |
Applications
| Power Supply Reference | Analog Sensor Excitation |
|---|---|
Use Scenario: Providing stable 33 V reference for linear regulators and op-amp feedback networks in industrial power modules. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to clamp and stabilize reference node voltage. Use Value: Tight 32.18–34.83 V tolerance and ≤250 Ω dynamic impedance ensure <±1% output drift under line/load variation. | Use Scenario: Biasing bridge sensors (e.g., strain gauges, RTDs) requiring low-noise, stable excitation voltage. IC Role / Device Role / Timing Role: Low-noise voltage reference source replacing higher-cost IC references where 33 V matches sensor full-scale range. Use Value: ≤50 µV RMS noise (10–500 kHz) prevents signal degradation in 16-bit+ measurement systems. |
| Waveform Clipping | Overvoltage Protection |
Use Scenario: Limiting AC signal peaks in audio preamplifier inputs or test equipment front-ends. IC Role / Device Role / Timing Role: Two-terminal shunt limiter clamping positive excursions to +33 V and negative to −0.7 V (forward drop). Use Value: Sharp breakdown onset minimizes distortion at clipping threshold; DO-34 package allows direct placement near input jacks. | Use Scenario: Protecting microcontroller I/O pins or ADC inputs from transient overvoltage events. IC Role / Device Role / Timing Role: Fast-acting shunt clamp diverting surge energy to ground before damage occurs. Use Value: 2.4 W surge rating (10 µs) absorbs common ESD and inductive kick events without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4749A | 33 V, 1 W, DO-41 package; higher power but larger footprint and looser tolerance (±5%) | Suitable for higher-power regulation where board space permits larger axial package | Choose 1N4749A only if >400 mW dissipation or DO-41 compatibility is required |
| BZX55-C33 | 33 V, 500 mW, DO-35 package; tighter tolerance (±5%) but higher noise (>100 µV) and no DHD thermal enhancement | Better for cost-sensitive consumer designs where noise and thermal performance are secondary | Select BZX55-C33 when DO-35 footprint is mandated and 500 mW margin suffices |
Compared with 1N4749A and BZX55-C33, RD33JS-T1-AZ delivers superior thermal efficiency in compact DO-34 form factor, lower noise for analog use cases, and tighter voltage tolerance - making it optimal for space-constrained industrial references where stability and signal integrity are critical.
Availability
RD33JS-T1-AZ is available at Aetrix Electronics and suitable for industrial power supplies, analog sensor interfaces, waveform conditioning circuits, and overvoltage protection nodes requiring stable component supply and long-term obsolescence management.
Supply support for RD33JS-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 specializing in microcontrollers, analog, and power devices for industrial, automotive, and infrastructure markets.
The RDJS series Zener diodes were designed for precision voltage reference and regulation in industrial-grade equipment, emphasizing thermal robustness, low noise, and tight parametric control in miniature DO-34 packaging.
FAQ
What is the exact zener voltage range for RD33JS-T1-AZ at 5 mA test current?
The RD33JS-T1-AZ has a guaranteed zener voltage range of 32.18 V to 34.83 V when measured at 5 mA reverse current and 25 °C ambient temperature, per Renesas datasheet D13937EJ5V0DS00. This ±3% tolerance reflects E24 standard compliance and is verified during production screening. RD33JS-T1-AZ maintains this specification across its qualified operating temperature range.
Can RD33JS-T1-AZ be used in surface-mount designs?
No - RD33JS-T1-AZ uses a DO-34 glass axial package with radial leads intended for through-hole mounting only. It lacks solder pads or terminations compatible with reflow or wave soldering for SMT assembly. For surface-mount equivalents, consider Renesas' NSZ series or other SOD-123 packaged Zeners; RD33JS-T1-AZ must be manually or wave-soldered into plated-through holes.
What is the maximum allowable junction temperature for RD33JS-T1-AZ?
The absolute maximum junction temperature for RD33JS-T1-AZ is +175 °C, as specified in the Absolute Maximum Ratings table of Renesas datasheet D13937EJ5V0DS00. Operation beyond this limit risks irreversible degradation of the silicon junction. Derating begins at 25 °C ambient, with power dissipation reduced linearly to zero at 175 °C junction temperature - requiring appropriate PCB copper area for thermal management.
Does RD33JS-T1-AZ meet RoHS requirements?
Yes - RD33JS-T1-AZ complies with the EU RoHS Directive (2011/65/EU) as confirmed by Renesas Electronics' environmental compliance documentation. The DO-34 glass package contains no lead in solderable terminations, and all materials meet restricted substance thresholds. Full compliance data is available via Renesas' material declaration portal; RD33JS-T1-AZ is rated for "Standard" quality grade applications.
How does the noise performance of RD33JS-T1-AZ compare to general-purpose Zeners?
RD33JS-T1-AZ delivers ≤50 µV RMS noise (10–500 kHz), significantly lower than typical general-purpose Zeners (often >100 µV). This is achieved via optimized DHD construction and low-noise epitaxial processing. In precision applications like sensor excitation or ADC reference buffering, RD33JS-T1-AZ's noise floor directly improves effective resolution - a measurable advantage over alternatives such as 1N4749A or BZX55-C33.
RD33JS-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:
- -
RD33JS-T1-AZ FAQ
1.How can I place an order for RD33JS-T1-AZ through Aetrix?
Please submit a Request for Quotation (RFQ) for RD33JS-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 RD33JS-T1-AZ reliable?
The price and inventory of RD33JS-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 RD33JS-T1-AZ is usually 5 days.
3.What payment methods are accepted for RD33JS-T1-AZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD33JS-T1-AZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD33JS-T1-AZ?
RD33JS-T1-AZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD33JS-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 RD33JS-T1-AZ?
For technical support, including RD33JS-T1-AZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD33JS-T1-AZ requirements.
6.How does Aetrix verify that RD33JS-T1-AZ is sourced from the original manufacturer or authorized distributors?
All RD33JS-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 RD33JS-T1-AZ meets industry standards.
7.What is the process for return or replacement of RD33JS-T1-AZ?
All RD33JS-T1-AZ units undergo pre-shipment inspection (PSI). If there is an issue with RD33JS-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 RD33JS-T1-AZ part is unused and in its original packaging.
Return procedure for RD33JS-T1-AZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD33JS-T1-AZ Tags
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