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Renesas RD2.0MW-T1B-A
- Part No.:
- RD2.0MW-T1B-A
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
RD2.0MW-T1B-A.pdf
- Description:
- RD2.0MW-T1B-A - ZENER DIODES 200
- Quantity:
- Payment:
- Shipping:
Inventory:44,184
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Product details
Overview
RD2.0MW-T1B-A from Renesas Electronics is a 200 mW, 3-pin Mini Mold (SC-59) dual-cathode zener diode with nominal zener voltage 2.0 V (±5% tolerance, Class B), 100 Ω dynamic impedance at 5 mA, and 0.5 V reverse leakage threshold - used for precision voltage reference, ESD protection, and waveform clipping in low-power analog signal paths.
For engineers reviewing the RD2.0MW-T1B-A datasheet, RD2.0MW-T1B-A pinout, RD2.0MW-T1B-A application, or RD2.0MW-T1B-A equivalent, key selection criteria include its dual-cathode configuration (K1/K2), 200 mW power rating, 120 Ω max dynamic impedance, 150°C junction temperature limit, and SC-59 package compatibility with automated SMT assembly.
Technical Context
This device implements a monolithic dual-zener structure in a single SC-59 package, enabling bidirectional clamping or independent cathode referencing. Its E24-standardized 2.0 V zener voltage supports stable biasing in low-voltage logic interfaces and sensor conditioning circuits.
The RD2.0MW-T1B-A operates within a –55°C to +150°C storage range and delivers 85 W surge absorption capability at 10 µs pulse width. It exhibits a negative temperature coefficient below 5 V, with typical γZ of –0.06 %/°C, making it suitable for ambient-stable reference applications where thermal drift must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 1.90–2.20 V at IZ = 5 mA - defines precise clamping threshold for 2.0 V rail regulation |
| Dynamic Impedance ZZ | ≤100 Ω at IZ = 5 mA - ensures minimal voltage shift under load variation |
| Power Dissipation P | 200 mW at TA = 25°C - sets maximum continuous DC power handling in standard PCB layout |
| Peak Reverse Power PRSM | 85 W at t = 10 µs - enables robust transient suppression against ESD and fast surges |
| Reverse Leakage IR | ≤100 µA at VR = 0.5 V - guarantees low standby current in high-impedance bias networks |
| Junction Temperature Tj | 150°C maximum - determines thermal derating curve for operation above 25°C ambient |
| Forward Voltage VF | ≤0.35 V at IF = 5 mA - supports low-loss forward conduction in dual-cathode clamp configurations |
Pinout & Package
RD2.0MW-T1B-A uses the SC-59 (EIAJ) 3-pin Mini Mold package: 2.9 mm × 2.8 mm × 1.1–1.4 mm height, with gull-wing leads and standardized marking orientation (K2 on pin 2, K1 on pin 1, A on pin 3).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K1) | First Cathode | Enables independent zener operation between Anode and K1; used for primary clamping path |
| 2 (K2) | Second Cathode | Provides second zener junction for bidirectional protection or dual-reference generation |
| 3 (A) | Anode | Common anode terminal shared by both zener junctions; connects to ground or low-side reference |
Key Features
| Feature | Design Value |
|---|---|
| Dual-cathode monolithic construction | Enables compact bidirectional clamping without discrete diode pairing or board space penalty |
| E24-standardized zener voltage | Ensures interchangeability across design revisions and supplier sourcing without recalibration |
| 85 W surge absorption (10 µs) | Meets IEC 61000-4-2 Level 4 ESD immunity requirements when properly decoupled |
| SC-59 surface-mount package | Supports 0.65 mm lead pitch reflow assembly and automated optical inspection (AOI) |
| Negative temperature coefficient (–0.06 %/°C) | Compensates for positive drift in associated circuitry, improving overall thermal stability |
Applications
| USB Interface Protection | Sensor Signal Conditioning |
|---|---|
Use Scenario: Protecting USB D+ and D− lines from ESD events in portable host devices. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor placed between data lines and ground. Use Value: RD2.0MW-T1B-A's dual-cathode configuration allows symmetric clamping of both differential lines using a single device, reducing component count and layout area by 50% versus discrete solutions. | Use Scenario: Stabilizing bias voltage for analog-output temperature or pressure sensors operating near 2.0 V. IC Role / Device Role / Timing Role: Precision shunt reference providing low-drift excitation voltage. Use Value: RD2.0MW-T1B-A's 1.90–2.20 V zener range and ≤100 Ω dynamic impedance maintain sensor output linearity within ±0.5% over 0–70°C ambient. |
| Low-Voltage Logic Clamp | Waveform Shaping Circuit |
Use Scenario: Preventing overvoltage damage to 2.5 V or 3.3 V microcontroller GPIO pins during hot-plug events. IC Role / Device Role / Timing Role: Input-level clamp limiting pin voltage to safe margin below absolute maximum ratings. Use Value: RD2.0MW-T1B-A's 0.35 V forward voltage and 2.20 V zener ceiling ensure GPIO remains within 0.3 V of VDD during fault conditions, avoiding latch-up. | Use Scenario: Generating square-wave harmonics from sine-wave oscillator outputs in audio test equipment. IC Role / Device Role / Timing Role: Symmetric waveform clipper shaping AC signal peaks at ±2.0 V. Use Value: RD2.0MW-T1B-A's matched K1/K2 characteristics provide <10 mV asymmetry between positive/negative clipping thresholds, preserving waveform fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5221BS | Single-cathode, 2.0 V, 225 mW, SOT-23 package; no dual-cathode functionality | Requires two devices for bidirectional clamping; larger board footprint | Select when only unidirectional regulation is needed and SOT-23 footprint is preferred |
| Vishay SMBZ5221B | Single-cathode, 2.0 V, 350 mW, DO-214AA package; higher power but through-hole or larger SMD | Not suitable for space-constrained 3-pin Mini Mold layouts; lacks K1/K2 terminal separation | Select when higher surge energy handling (>85 W) is required and board area permits larger package |
Compared with MMBZ5221BS and SMBZ5221B, RD2.0MW-T1B-A uniquely integrates dual cathodes in SC-59, enabling true bidirectional clamping in minimal area - critical for USB, sensor, and low-voltage logic protection where layout density and symmetry matter.
Availability
RD2.0MW-T1B-A is available at Aetrix Electronics and suitable for USB interface protection, sensor signal conditioning, low-voltage logic clamp, and waveform shaping circuits requiring stable component supply and consistent parametric performance across production lots.
Supply support for RD2.0MW-T1B-A 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 automotive, industrial, and consumer systems.
The RD2.0MW-T1B-A belongs to Renesas' legacy zener diode portfolio designed for precision voltage reference and transient protection in cost-sensitive, space-constrained applications - emphasizing reliability, tight tolerances, and standardized packaging for high-volume manufacturing.
FAQ
What is the exact zener voltage tolerance for RD2.0MW-T1B-A?
The RD2.0MW-T1B-A has a guaranteed zener voltage range of 1.90 V to 2.20 V at 5 mA test current, corresponding to ±5% tolerance per E24 standard. This specification is verified per Renesas Data Sheet D10247EJ5V0DS00, Section "ELECTRICAL CHARACTERISTICS", and applies to all units shipped under this part number.
Does RD2.0MW-T1B-A support bidirectional ESD protection out of the box?
Yes - RD2.0MW-T1B-A integrates two independent zener junctions sharing a common anode (pin 3), with dedicated cathodes on pins 1 (K1) and 2 (K2). This allows symmetrical clamping between either cathode and the anode, enabling true bidirectional transient suppression without external components.
What is the maximum allowable surge pulse width for RD2.0MW-T1B-A at 85 W?
The 85 W peak reverse power rating for RD2.0MW-T1B-A is specified at a pulse width of 10 µs (t = 10 µs), as defined in the "MAXIMUM RATINGS" table of Renesas Data Sheet D10247EJ5V0DS00. Longer pulses require derating per the Fig. 6 Surge Reverse Power Ratings curve.
Can RD2.0MW-T1B-A be used as a replacement for standard 1N4728A in 3.3 V regulator feedback loops?
No - RD2.0MW-T1B-A is rated for 2.0 V nominal zener voltage and 200 mW dissipation, whereas 1N4728A is a 3.3 V, 1 W device. Substituting RD2.0MW-T1B-A would cause severe regulation failure. It is not a functional or electrical replacement for 1N4728A; use only in 2.0 V reference or clamping roles as specified in its datasheet.
Is RD2.0MW-T1B-A compliant with RoHS and lead-free assembly requirements?
Yes - RD2.0MW-T1B-A conforms to EU RoHS Directive 2011/65/EU and supports lead-free reflow soldering per J-STD-020. Renesas confirms environmental compliance in its product change notices and material declarations, and the device is marked "Pb-Free" in official packaging documentation.
RD2.0MW-T1B-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- -
- Tolerance:
- -
- Power - Max:
- -
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- -
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-59
RD2.0MW-T1B-A FAQ
1.How can I place an order for RD2.0MW-T1B-A through Aetrix?
Please submit a Request for Quotation (RFQ) for RD2.0MW-T1B-A 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 RD2.0MW-T1B-A reliable?
The price and inventory of RD2.0MW-T1B-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RD2.0MW-T1B-A is usually 5 days.
3.What payment methods are accepted for RD2.0MW-T1B-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD2.0MW-T1B-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD2.0MW-T1B-A?
RD2.0MW-T1B-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD2.0MW-T1B-A 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 RD2.0MW-T1B-A?
For technical support, including RD2.0MW-T1B-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD2.0MW-T1B-A requirements.
6.How does Aetrix verify that RD2.0MW-T1B-A is sourced from the original manufacturer or authorized distributors?
All RD2.0MW-T1B-A 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 RD2.0MW-T1B-A meets industry standards.
7.What is the process for return or replacement of RD2.0MW-T1B-A?
All RD2.0MW-T1B-A units undergo pre-shipment inspection (PSI). If there is an issue with RD2.0MW-T1B-A, 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 RD2.0MW-T1B-A part is unused and in its original packaging.
Return procedure for RD2.0MW-T1B-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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