My Inquiry
My Account
Renesas RD2.2UM-T1-A
- Part No.:
- RD2.2UM-T1-A
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- 2-SMD, Gull Wing
- Datasheet:
-
RD2.2UM-T1-A.pdf
- Description:
- RD2.2UM-T1-A - ZENER DIODES 2PIN
- Quantity:
- Payment:
- Shipping:
Inventory:27,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
RD2.2UM-T1-A from Renesas Electronics is a 2-pin Ultra Super Mini Mold (USM) surface-mount Zener diode with nominal zener voltage 2.2 V, 150 mW power dissipation, and dynamic impedance ≤0.7 Ω at 5 mA test current-designed for precision low-voltage regulation in space-constrained consumer and industrial control circuits.
For engineers reviewing the RD2.2UM-T1-A datasheet, RD2.2UM-T1-A pinout, RD2.2UM-T1-A application, or RD2.2UM-T1-A equivalent, this device serves as a compact, E24-standard-compliant voltage reference for constant-voltage biasing, waveform clipping, and transient suppression where tight VZ tolerance (±0.15 V), low ZZ, and stable thermal coefficient are critical.
Technical Context
This Zener diode operates in reverse breakdown mode with sharp knee characteristics, enabling accurate clamping and reference functions at low currents (5–100 mA). Its USM package supports high-density PCB layouts while maintaining thermal performance up to 150 °C junction temperature.
Rated for 85 W surge reverse power at 10 µs pulse width, RD2.2UM-T1-A delivers robust transient immunity without external protection components. The device exhibits a typical temperature coefficient of +0.02 %/°C near 2.2 V, ensuring minimal drift across ambient operating ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 2.10–2.40 V at IZ = 5 mA - ensures precise low-voltage reference within ±0.15 V tolerance for analog biasing and feedback networks. |
| Dynamic Impedance ZZ | ≤0.7 Ω at IZ = 5 mA - maintains stable output voltage under varying load conditions in regulator and clamp circuits. |
| Power Dissipation P | 150 mW at TA = 25 °C - defines maximum continuous DC power handling on standard FR-4 or ceramic PCBs. |
| Reverse Surge Power | 85 W at t = 10 µs (single pulse) - provides inherent protection against short-duration transients without added TVS devices. |
| Junction Temperature | 150 °C - allows operation in thermally demanding environments such as enclosed power supplies and motor drivers. |
| Package | 2-pin Ultra Super Mini Mold (USM) - 2.1 × 1.3 mm footprint with 0.3 mm cathode marking height, optimized for automated SMT assembly. |
| Reverse Current IR | ≤120 µA at VR = 0.5 V - guarantees low leakage in standby and battery-powered applications. |
Pinout & Package
RD2.2UM-T1-A uses a 2-pin Ultra Super Mini Mold (USM) package with anode and cathode terminals. Cathode is marked by a visible band on the top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node | Connected to circuit ground or lower-potential rail when used in reverse-biased Zener configuration. |
| Cathode | Zener breakdown terminal / Output reference node | Provides regulated voltage relative to anode; polarity must be observed to avoid forward conduction failure. |
Key Features
| Feature | Design Value |
|---|---|
| Sharp breakdown knee | Enables clean voltage clamping at low currents (5 mA), reducing need for series resistors in reference paths. |
| E24-standard VZ | Supports standardized BOM selection and interchangeability across common low-voltage design points. |
| Low dynamic impedance | 0.7 Ω at 5 mA minimizes output voltage variation under load changes in precision shunt regulators. |
| Ultra compact USM package | 2.1 × 1.3 mm footprint saves >40% board area vs. standard SOD-323, critical for wearables and IoT sensors. |
| High surge power rating | 85 W peak capability eliminates need for parallel transient suppressors in cost-sensitive ESD-prone interfaces. |
Applications
| USB Port Protection | Microcontroller Reset Circuit |
|---|---|
|
Use Scenario: Clamping 5 V USB VBUS line against ESD and hot-swap transients in portable peripherals. IC Role / Device Role / Timing Role: Shunt-type transient absorber placed between VBUS and GND, conducting above 2.4 V to limit downstream voltage. Use Value: Leverages 85 W surge rating and 0.7 Ω ZZ to clamp spikes below IC damage thresholds without adding TVS diodes. |
Use Scenario: Generating a stable 2.2 V reference for microcontroller reset comparator threshold. IC Role / Device Role / Timing Role: Precision voltage reference source feeding into reset IC input or internal bandgap comparator. Use Value: Tight 2.10–2.40 V tolerance and low temperature coefficient ensure reliable reset assertion across –40 to +85 °C. |
| LED Current Regulation | Op-Amp Bias Network |
|
Use Scenario: Setting fixed bias point for constant-current LED driver using shunt-regulated topology. IC Role / Device Role / Timing Role: Zener-based current-setting element in emitter-follower or op-amp-controlled LED sink. Use Value: Low 0.7 Ω impedance maintains stable current despite supply ripple, improving LED brightness consistency. |
Use Scenario: Providing matched reference voltage for dual-supply op-amp input biasing in audio preamps. IC Role / Device Role / Timing Role: Low-noise DC reference node stabilizing virtual ground or common-mode level. Use Value: Sharp breakdown and minimal leakage (<120 µA) prevent offset drift and signal distortion in high-gain stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584-C2V2 (Nexperia) | VZ = 2.2 V ±5%, ZZ = 15 Ω @ 5 mA - higher impedance, larger SOD-323 package (3.7 × 1.6 mm). | Limited to non-critical biasing due to higher ZZ; unsuitable for low-current precision references. | Select when legacy SOD-323 footprint compatibility is required and tighter regulation is not needed. |
| MMSZ4678 (ON Semiconductor) | VZ = 2.0 V ±5%, ZZ = 100 Ω @ 1 mA - lower nominal voltage, significantly higher impedance, same SOD-123 footprint. | Higher ZZ causes greater voltage droop under load; less effective for active regulation or clamping. | Choose only for basic overvoltage limiting where 2.0 V threshold suffices and board space permits SOD-123. |
Compared with BZX584-C2V2 and MMSZ4678, RD2.2UM-T1-A delivers superior regulation accuracy (±0.15 V), ultra-low dynamic impedance (0.7 Ω), and 60% smaller USM footprint-making it optimal for high-density, low-drift applications where space and stability are constrained.
Availability
RD2.2UM-T1-A is available at Aetrix Electronics and suitable for USB interface protection, microcontroller reset circuits, LED biasing, and op-amp reference networks requiring stable component supply and RoHS-compliant sourcing.
Supply support for RD2.2UM-T1-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.
RD2.2UM-T1-A belongs to the RD2.0UM–RD39UM Zener diode family engineered for compact, high-reliability voltage regulation in space-limited consumer electronics and industrial controls.
FAQ
What is the zener voltage tolerance of RD2.2UM-T1-A?
The RD2.2UM-T1-A has a specified zener voltage range of 2.10 V to 2.40 V at IZ = 5 mA, corresponding to a ±0.15 V absolute tolerance. This tight window meets E24 standard grading and enables predictable performance in low-voltage reference designs without post-production trimming.
Can RD2.2UM-T1-A be used in place of a standard 2.2 V Zener in SOD-323 packages?
No-RD2.2UM-T1-A uses the proprietary Ultra Super Mini Mold (USM) package (2.1 × 1.3 mm), which is physically smaller than SOD-323 (3.7 × 1.6 mm). Direct substitution requires PCB layout revision. Its electrical specs differ too: RD2.2UM-T1-A offers 0.7 Ω ZZ, versus ~15 Ω for typical SOD-323 2.2 V Zeners like BZX584-C2V2.
What is the maximum reverse surge power rating for RD2.2UM-T1-A?
RD2.2UM-T1-A is rated for 85 W of reverse surge power at a pulse width of 10 µs (single pulse), per Figure 6 in Renesas datasheet D13562EJ2V0DS00. This rating applies at TA = 25 °C and supports transient suppression in I/O lines without external TVS devices.
Does RD2.2UM-T1-A meet RoHS requirements?
Yes-RD2.2UM-T1-A complies with EU RoHS Directive 2011/65/EU. Renesas confirms environmental compliance in its product documentation and supports material declarations upon request. No lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE substances exceed allowable limits.
What is the thermal resistance characteristic of RD2.2UM-T1-A?
RD2.2UM-T1-A exhibits a transient thermal impedance (Zth) of 833 °C/W at t = 1 ms on a 30 × 30 × 1.6 mm glass epoxy PCB (Fig. 5, D13562EJ2V0DS00). This value decreases with longer time constants, supporting safe operation under pulsed power conditions typical in surge events.
RD2.2UM-T1-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 2-SMD, Gull Wing
- 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:
- 2-Ultra Super Mini Mold
RD2.2UM-T1-A FAQ
1.How can I place an order for RD2.2UM-T1-A through Aetrix?
Please submit a Request for Quotation (RFQ) for RD2.2UM-T1-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 RD2.2UM-T1-A reliable?
The price and inventory of RD2.2UM-T1-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RD2.2UM-T1-A is usually 5 days.
3.What payment methods are accepted for RD2.2UM-T1-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RD2.2UM-T1-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RD2.2UM-T1-A?
RD2.2UM-T1-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RD2.2UM-T1-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 RD2.2UM-T1-A?
For technical support, including RD2.2UM-T1-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RD2.2UM-T1-A requirements.
6.How does Aetrix verify that RD2.2UM-T1-A is sourced from the original manufacturer or authorized distributors?
All RD2.2UM-T1-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 RD2.2UM-T1-A meets industry standards.
7.What is the process for return or replacement of RD2.2UM-T1-A?
All RD2.2UM-T1-A units undergo pre-shipment inspection (PSI). If there is an issue with RD2.2UM-T1-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 RD2.2UM-T1-A part is unused and in its original packaging.
Return procedure for RD2.2UM-T1-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RD2.2UM-T1-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…
