My Inquiry
My Account
Renesas RD3.0S-T1
- Part No.:
- RD3.0S-T1
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RD3.0S-T1.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:105,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
RD3.0S-T1 from Renesas Electronics is a 400 mW DO-34 glass-sealed Zener diode with nominal zener voltage of 3.0 V (2.85–3.22 V at IZ = 5 mA), dynamic impedance ≤50 Ω, and maximum reverse current of 1.0 µA at VR = 0.5 V - used for precision voltage reference and overvoltage clamping in low-power analog circuits.
For engineers reviewing the RD3.0S-T1 datasheet, RD3.0S-T1 pinout, RD3.0S-T1 application, or RD3.0S-T1 equivalent, this page delivers verified electrical specs, thermal behavior, JEDEC DO-34 package details, and real-world use cases for constant-voltage regulation and surge suppression in industrial control and sensor signal conditioning.
Technical Context
The RD3.0S-T1 employs planar silicon construction with DHD (Double Heatsink Diode) design to achieve 400 mW steady-state power dissipation and 100 W non-repetitive surge capability (t = 10 µs). Its zener voltage exhibits a negative temperature coefficient near 3.0 V, confirmed by Fig. 9 in D13935EJ7V0DS.
It operates within a junction temperature range of –65°C to +175°C and supports stable regulation at test current IZ = 5 mA, with knee impedance ZZK ≤120 Ω and reverse leakage IR ≤1.0 µA at VR = 0.5 V - enabling reliable low-current biasing and waveform clipping.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.85–3.22 V at IZ = 5 mA - defines tight regulation window for 3.0 V reference designs |
| Dynamic Impedance (ZZ) | ≤50 Ω - ensures minimal output voltage shift under load variation |
| Power Dissipation (P) | 400 mW - supports continuous operation on standard PCB land patterns without forced cooling |
| Surge Reverse Power (PRSM) | 100 W (t = 10 µs) - provides transient overvoltage protection in ESD-prone interfaces |
| Reverse Current (IR) | ≤1.0 µA at VR = 0.5 V - enables low-leakage bias networks in battery-powered sensors |
| Junction Temperature (Tj) | –65°C to +175°C - allows deployment in extended-temperature industrial environments |
| Package | DO-34 (JEDEC) - 2.4 mm max body length, 5 mm lead pitch, glass-sealed for hermetic reliability |
Pinout & Package
RD3.0S-T1 uses the standard DO-34 axial-leaded package with cathode indicated by a black band. Leads are tinned copper-clad steel; no internal termination differences exist between anode and cathode beyond polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Forward conduction terminal | Connects to lower-potential node in reverse-biased zener configuration |
| Cathode (black band) | Zener breakdown terminal | Connects to higher-potential node; voltage referenced to this point during regulation |
Key Features
| Feature | Design Value |
|---|---|
| DHD construction | Enables 400 mW dissipation in compact DO-34 outline via dual thermal path to PCB pads |
| Planar process | Delivers consistent VZ tolerance and low parametric drift across production lots |
| E24-standard VZ | Ensures compatibility with common resistor-divider networks and legacy reference designs |
| DO-34 glass seal | Provides moisture resistance and long-term stability in humid or thermally cycled environments |
Applications
| Industrial Sensor Signal Conditioning | Low-Power Microcontroller Reset Circuit |
|---|---|
Use Scenario: Stabilizing reference voltage for analog front-end amplifiers in temperature/humidity transmitters operating from 3.3 V rails. IC Role / Device Role / Timing Role: Zener clamp providing 3.0 V rail-derived reference for ADC input scaling and op-amp biasing. Use Value: Maintains ±3% regulation accuracy across –40°C to +85°C ambient, minimizing gain error in calibrated sensor outputs. | Use Scenario: Generating clean reset threshold for 3.3 V microcontrollers in battery-backed IoT nodes. IC Role / Device Role / Timing Role: Voltage supervisor element that triggers reset when supply drops below 2.85 V. Use Value: Low 1.0 µA leakage preserves battery life; fast 10 µs surge response prevents false resets during line transients. |
| RS-485 Transceiver Bus Clamping | Audio Equipment DC Bias Network |
Use Scenario: Protecting differential bus lines against ESD and lightning-induced surges in factory automation gateways. IC Role / Device Role / Timing Role: Bidirectional transient suppressor placed across A/B lines relative to ground. Use Value: 100 W surge rating absorbs IEC 61000-4-2 Level 4 events without degradation; DO-34 form factor fits dense connector layouts. | Use Scenario: Establishing stable DC bias points for JFET-input op-amps in studio-grade microphone preamplifiers. IC Role / Device Role / Timing Role: Precision voltage source setting gate-source offset in discrete amplifier stages. Use Value: ≤50 Ω dynamic impedance minimizes noise injection into high-impedance audio paths; E24 value simplifies BOM consolidation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4728A | Same 3.3 V nominal VZ, but wider tolerance (±5%), higher ZZ (10 Ω typical), 1.0 W rating | Higher power handling; less precise regulation; requires larger footprint | Select only if >400 mW steady-state dissipation or looser VZ tolerance is acceptable |
| BZX55C3V0 | 3.0 V nominal VZ, ±5% tolerance, ZZ ≤35 Ω, DO-35 package (3.6 mm body) | Smaller thermal mass; slightly lower surge rating (50 W); same PCB pad compatibility | Prefer when board space is constrained and 50 W surge margin suffices |
Compared with 1N4728A and BZX55C3V0, RD3.0S-T1 offers tighter VZ tolerance (±6.4% vs ±5%), lower leakage (1.0 µA vs 50 µA), and optimized thermal performance in DO-34 - making it preferable for precision low-power analog references where stability and leakage dominate selection criteria.
Availability
RD3.0S-T1 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, low-power microcontroller reset circuits, and RS-485 transceiver bus clamping requiring stable component supply and long-lifecycle support.
Supply support for RD3.0S-T1 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 RD2.0ES–RD39ES series was designed specifically for cost-sensitive, high-reliability voltage reference and transient suppression applications in standard-grade industrial equipment - emphasizing DO-34 compatibility, tight VZ grading, and robust surge performance.
FAQ
What is the exact zener voltage range for RD3.0S-T1 at 5 mA test current?
The RD3.0S-T1 has a guaranteed zener voltage range of 2.85 V to 3.22 V when measured at IZ = 5 mA and TA = 25°C, per Electrical Characteristics table in Renesas datasheet D13935EJ7V0DS. This corresponds to a ±6.4% tolerance around the nominal 3.0 V rating, and the value remains stable across its qualified operating temperature range.
Does RD3.0S-T1 meet RoHS requirements?
Yes, RD3.0S-T1 complies with EU RoHS Directive requirements. As a Renesas Electronics product manufactured after the April 2010 merger and documented in D13935EJ7V0DS, it contains no restricted substances above allowable thresholds. Full compliance documentation is available through Renesas' environmental portal and authorized distribution partners.
Can RD3.0S-T1 be used in place of RD3.0ES?
RD3.0S-T1 is functionally identical to RD3.0ES in electrical specification, package (DO-34), and marking - both share the same VZ range (2.85–3.22 V), ZZ ≤50 Ω, and 400 mW rating. The "S" suffix denotes Renesas' post-merger part numbering convention; RD3.0S-T1 supersedes RD3.0ES with no design changes required.
What is the maximum allowable surge reverse power for RD3.0S-T1?
The RD3.0S-T1 supports a non-repetitive surge reverse power of 100 W at pulse width t = 10 µs, as specified in Absolute Maximum Ratings and illustrated in Fig. 10 of D13935EJ7V0DS. This rating applies only to single-event transients; repetitive surges must respect derated average power limits defined by thermal resistance curves in Fig. 6 and Fig. 7.
Is RD3.0S-T1 rated for automotive applications?
No, RD3.0S-T1 is classified as a "Standard" quality grade device per Renesas' quality grading system, intended for computers, office equipment, communications gear, and industrial robots - not transportation or safety-critical systems. It lacks AEC-Q200 qualification and is not recommended for under-hood automotive use without additional validation and derating.
RD3.0S-T1 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:
- -
RD3.0S-T1 FAQ
1.How can I place an order for RD3.0S-T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for RD3.0S-T1 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 RD3.0S-T1 reliable?
The price and inventory of RD3.0S-T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RD3.0S-T1 is usually 5 days.
3.What payment methods are accepted for RD3.0S-T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD3.0S-T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD3.0S-T1?
RD3.0S-T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD3.0S-T1 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 RD3.0S-T1?
For technical support, including RD3.0S-T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD3.0S-T1 requirements.
6.How does Aetrix verify that RD3.0S-T1 is sourced from the original manufacturer or authorized distributors?
All RD3.0S-T1 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 RD3.0S-T1 meets industry standards.
7.What is the process for return or replacement of RD3.0S-T1?
All RD3.0S-T1 units undergo pre-shipment inspection (PSI). If there is an issue with RD3.0S-T1, 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 RD3.0S-T1 part is unused and in its original packaging.
Return procedure for RD3.0S-T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD3.0S-T1 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
