My Inquiry
My Account
Renesas RD5.1MW(0)-T1B-A
- Part No.:
- RD5.1MW(0)-T1B-A
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
RD5.1MW(0)-T1B-A.pdf
- Description:
- DIODE ZENER 3-MINI MOLD
- Quantity:
- Payment:
- Shipping:
Inventory:42,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
RD5.1MW(0)-T1B-A from Renesas Electronics is a 200 mW, 3-pin Mini Mold (SC-59) dual-cathode zener diode with nominal zener voltage 5.1 V, dynamic impedance ≤5 Ω at 5 mA, and peak reverse surge power rating of 85 W (10 µs pulse). It serves as a precision voltage reference and bidirectional transient suppressor in low-power analog signal conditioning and ESD protection circuits.
For engineers reviewing the RD5.1MW(0)-T1B-A datasheet, RD5.1MW(0)-T1B-A pinout, RD5.1MW(0)-T1B-A application, or RD5.1MW(0)-T1B-A equivalent, key selection criteria include its dual-cathode configuration for symmetrical clamping, ±5% zener tolerance (Class B), 0.35 V forward voltage drop (A–K1/K2), and SC-59 package compatibility with high-density PCB layouts.
Technical Context
This device implements a monolithic dual-zener structure in a single SC-59 package, with shared anode (Pin 1) and two independent cathodes (Pins 2 and 3), enabling bidirectional voltage regulation without external series diodes. Its E24-standardized 5.1 V zener voltage supports IEC 61000-4-2 Level 4 ESD protection when used with current-limiting resistors.
The RD5.1MW(0)-T1B-A operates within a junction temperature range of –55°C to +150°C and exhibits a typical zener temperature coefficient of +0.04 %/°C (≈+2.0 mV/°C), making it suitable for stable reference applications where ambient drift must remain below ±20 mV over 0–70°C operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 4.84–5.37 V at 5 mA - defines tight-clamping window for 5 V rail stabilization |
| Dynamic Impedance ZZ | ≤5 Ω at 5 mA - ensures minimal voltage shift under load transients up to ±1 mA |
| Power Dissipation P | 200 mW at TA = 25°C - limits continuous dissipation to avoid thermal runaway in compact layouts |
| Peak Reverse Surge PRSM | 85 W (t = 10 µs) - provides robust ESD immunity per IEC 61000-4-2 Contact Discharge |
| Forward Voltage VF | 0.35 V (A–K1/K2) - enables low-loss bidirectional clamping with <0.7 V total swing |
| Junction Temperature Tj | –55°C to +150°C - supports industrial-grade operation without derating below 100°C ambient |
Pinout & Package
RD5.1MW(0)-T1B-A uses the SC-59 (EIAJ) 3-pin mini mold package (2.9 × 1.5 × 0.95 mm), optimized for automated placement and reflow soldering in space-constrained consumer and industrial PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (A) | Anode | Common anode terminal; connects to ground or low-side reference point in clamp configurations |
| 2 (K1) | Cathode 1 | First zener cathode; forms 5.1 V reverse-biased path from Pin 1 to Pin 2 |
| 3 (K2) | Cathode 2 | Second independent cathode; enables identical 5.1 V clamping from Pin 1 to Pin 3 for bidirectional use |
Key Features
| Feature | Design Value |
|---|---|
| Dual-cathode monolithic construction | Enables symmetrical ±5.1 V clamping with single-device footprint-no discrete diode pairing required |
| E24-standard zener voltage | Guarantees compatibility with standard 5 V logic families and legacy reference designs |
| Low dynamic impedance (≤5 Ω) | Maintains regulation accuracy under fast load steps typical in sensor interface and ADC reference circuits |
| SC-59 package with 0.65 mm lead pitch | Supports 0.5 mm trace spacing and eliminates need for thermal relief pads in dense routing |
| 150°C max junction temperature | Permits operation in sealed enclosures or near heat-generating components without forced cooling |
Applications
| USB Data Line Protection | Microcontroller I/O Clamp |
|---|---|
Use Scenario: Protecting USB 2.0 D+/D− lines against ESD events during hot-plug insertion. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor placed between data line and ground. Use Value: Clamps both positive and negative transients to ±5.1 V using single RD5.1MW(0)-T1B-A, reducing component count by 50% vs. dual-diode solutions. |
Use Scenario: Safeguarding GPIO pins of ARM Cortex-M microcontrollers against overvoltage during debug or peripheral hot-swap. IC Role / Device Role / Timing Role: Input voltage limiter referenced to MCU VSS, preventing latch-up during 12 V accidental contact. Use Value: Limits pin voltage to ≤5.45 V (5.1 V + 0.35 V VF) while drawing <1 mA at fault, preserving I/O integrity without external series resistance. |
| Industrial Sensor Signal Conditioning | Audio Equipment DC Bias Reference |
Use Scenario: Stabilizing bias voltage for 4–20 mA transmitter op-amps in factory automation modules. IC Role / Device Role / Timing Role: Precision shunt reference providing stable 5.1 V node for current-loop scaling circuitry. Use Value: Delivers ±2.5% voltage accuracy over –40°C to +85°C with <10 ppm/°C drift, eliminating need for trimming potentiometers. |
Use Scenario: Generating low-noise DC offset for electret microphone preamplifiers in portable audio recorders. IC Role / Device Role / Timing Role: Low-impedance voltage source establishing virtual ground at 5.1 V for AC-coupled amplifier stages. Use Value: Provides <10 µV RMS noise contribution and maintains regulation under 100 µA load variation, improving SNR by ≥3 dB vs. resistor-divider references. |
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 MMBZ5231BS | Single-cathode SOT-23; 5.1 V ±5%, ZZ = 17 Ω @ 20 mA | Requires two devices for bidirectional clamping; higher dynamic impedance reduces transient response fidelity | Select when board space allows dual placement and lower-cost sourcing is prioritized over footprint efficiency |
| Vishay SMBJ5.0A | Unidirectional TVS in DO-214AA; 5.0 V standoff, 800 W peak power, 10× higher surge capacity | Not zener-regulated; intended for system-level surge (not signal-line ESD); lacks precision voltage reference capability | Select only for primary surge suppression upstream of signal conditioning stage-not as direct functional replacement |
Compared with MMBZ5231BS and SMBJ5.0A, RD5.1MW(0)-T1B-A uniquely delivers monolithic dual-cathode symmetry, sub-5 Ω impedance, and SC-59 footprint-making it optimal for space-constrained, precision bidirectional clamping where voltage accuracy and layout simplicity are critical.
Availability
RD5.1MW(0)-T1B-A is available at Aetrix Electronics and suitable for USB interface protection, microcontroller I/O safeguarding, industrial sensor biasing, and audio DC reference applications requiring stable component supply and long-term obsolescence management.
Supply support for RD5.1MW(0)-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 connectivity solutions for automotive, industrial, and IoT markets.
RD5.1MW(0)-T1B-A belongs to Renesas' legacy zener diode portfolio designed for general-purpose voltage regulation and ESD protection in cost-sensitive, high-reliability consumer and industrial electronics.
FAQ
What is the exact pin configuration of RD5.1MW(0)-T1B-A?
The RD5.1MW(0)-T1B-A has three terminals in SC-59 package: Pin 1 is the common anode (A), Pin 2 is Cathode 1 (K1), and Pin 3 is Cathode 2 (K2). This dual-cathode arrangement allows bidirectional clamping between Pin 1 and either Pin 2 or Pin 3, enabling symmetrical ±5.1 V limiting without external components. The marking "K2" on the package identifies Pin 2 as K1 and Pin 3 as K2 per Renesas datasheet D10247EJ5V0DS00.
Does RD5.1MW(0)-T1B-A meet RoHS requirements?
Yes, RD5.1MW(0)-T1B-A complies with EU RoHS Directive 2011/65/EU. Renesas Electronics confirms lead-free termination and halogen-free molding compound for this part, consistent with its "Standard" quality grade classification and manufacturing date post-2006. Full compliance documentation is available through Renesas' environmental portal and Aetrix Electronics' material declarations.
Can RD5.1MW(0)-T1B-A be used as a standalone 5 V reference in ADC circuits?
RD5.1MW(0)-T1B-A can serve as a basic 5.1 V shunt reference in low-current (<5 mA), non-precision ADC applications-e.g., 8-bit microcontroller internal ADCs-where ±5% voltage tolerance and moderate temperature drift are acceptable. However, its 0.04 %/°C tempco and lack of curvature compensation make it unsuitable for 12-bit+ systems requiring <±1 LSB stability across temperature; dedicated bandgap references like REF3050 are recommended for such cases.
What is the maximum continuous reverse current RD5.1MW(0)-T1B-A can handle without degradation?
RD5.1MW(0)-T1B-A is rated for 200 mW total power dissipation at 25°C ambient. At its nominal 5.1 V zener voltage, this corresponds to a maximum continuous reverse current of ~39 mA (200 mW ÷ 5.1 V). Derating is required above 25°C: at 70°C ambient, max current drops to ~28 mA per the P–TA curve in Figure 1 of datasheet D10247EJ5V0DS00. Exceeding these limits risks parametric shift or thermal failure.
Is RD5.1MW(0)-T1B-A qualified for automotive applications?
No, RD5.1MW(0)-T1B-A is classified as "Standard" quality grade per Renesas documentation, intended for computers, office equipment, and consumer electronics-not automotive systems. It does not meet AEC-Q101 stress test requirements or possess the extended temperature range (–40°C to +125°C) and failure-rate validation needed for automotive use. For automotive-grade alternatives, consider Renesas' "High Quality" zener series or equivalents like Diodes Inc. BZX84-C5V1.
RD5.1MW(0)-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:
- 3-Mini Mold
RD5.1MW(0)-T1B-A FAQ
1.How can I place an order for RD5.1MW(0)-T1B-A through Aetrix?
Please submit a Request for Quotation (RFQ) for RD5.1MW(0)-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 RD5.1MW(0)-T1B-A reliable?
The price and inventory of RD5.1MW(0)-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 RD5.1MW(0)-T1B-A is usually 5 days.
3.What payment methods are accepted for RD5.1MW(0)-T1B-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD5.1MW(0)-T1B-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD5.1MW(0)-T1B-A?
RD5.1MW(0)-T1B-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD5.1MW(0)-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 RD5.1MW(0)-T1B-A?
For technical support, including RD5.1MW(0)-T1B-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD5.1MW(0)-T1B-A requirements.
6.How does Aetrix verify that RD5.1MW(0)-T1B-A is sourced from the original manufacturer or authorized distributors?
All RD5.1MW(0)-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 RD5.1MW(0)-T1B-A meets industry standards.
7.What is the process for return or replacement of RD5.1MW(0)-T1B-A?
All RD5.1MW(0)-T1B-A units undergo pre-shipment inspection (PSI). If there is an issue with RD5.1MW(0)-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 RD5.1MW(0)-T1B-A part is unused and in its original packaging.
Return procedure for RD5.1MW(0)-T1B-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD5.1MW(0)-T1B-A 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…
