My Inquiry
My Account
onsemi SRDA05-4R2
- Part No.:
- SRDA05-4R2
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SRDA05-4R2.pdf
- Description:
- TVS DIODE 5VWM 12VC 8-SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,967
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SRDA05-4R2 from onsemi is a unidirectional low-capacitance TVS diode array in SO-8 package, designed for ESD/EFT/lightning protection of high-speed data interfaces. It features 6 V working peak reverse voltage, ≤10 pF inter-I/O capacitance, 9.8 V clamping at 1 A, and 500 W peak pulse power (8 × 20 µs), deployed in USB 2.0 and Ethernet PHY line protection.
For engineers reviewing the SRDA05-4R2 datasheet, pinout, applications, or equivalent options, key selection criteria include inter-pin capacitance (<10 pF), clamping voltage at 10 A (≤12 V), unidirectional configuration, SO-8 thermal and layout compatibility, and IEC 61000-4-2/4-4/4-5 compliance.
Technical Context
The SRDA05-4R2 implements a four-channel unidirectional TVS architecture with common-reference (REF) pins tied to ground, enabling independent protection of two differential pairs (I/O1–I/O2 and I/O3–I/O4). Each channel has a 6 V breakdown voltage and sub-10 pF inter-pin capacitance to preserve signal integrity on >480 Mbps links.
It operates within −55 °C to +150 °C junction temperature range and supports reflow soldering up to 260 °C for 10 s. Clamping performance is specified at 1 A and 10 A (8 × 20 µs), delivering 9.8 V and 12 V respectively - critical for maintaining receiver input thresholds during transient events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Peak Reverse Voltage | 5.0 V - sets maximum steady-state DC bias before leakage rises significantly |
| Breakdown Voltage @ 1 mA | 6.0 V - defines onset of avalanche conduction for reliable turn-on during transients |
| Clamping Voltage @ 1 A | 9.8 V - ensures protected IC inputs remain below absolute maximum ratings during ESD |
| Clamping Voltage @ 10 A | 12 V - maintains safe margin for lightning-surge-level energy (23 A, 8/20 µs) |
| Inter-I/O Capacitance | 5–8 pF @ 1 MHz - enables use in USB 2.0, HDMI, and LVDS without signal degradation |
| Peak Pulse Power | 500 W (8 × 20 µs) - sustains multi-pulse EFT bursts per IEC 61000-4-4 Level 4 |
| ESD Rating (IEC 61000-4-2) | ±15 kV air, ±8 kV contact - exceeds industrial immunity requirements for front-panel ports |
Pinout & Package
SRDA05-4R2 uses an SO-8 package (Case 751-07), 4.8–5.0 mm × 3.8–4.0 mm body, 1.35–1.75 mm height, with gull-wing leads and 1.27 mm pitch. Pin 1 marked by notch or bevel.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (I/O1) | Data line input/output channel A | Protected signal path paired with Pin 2 (REF1); connects to D+ or TX+ |
| 2 (REF1) | Common cathode reference for Channel A | Internally tied to ground; must be connected to system GND for unidirectional clamping |
| 3 (REF1) | Redundant REF1 terminal | Provides low-inductance ground return path parallel to Pin 2; improves ESD current distribution |
| 4 (I/O2) | Data line input/output channel A | Paired with Pin 1 as differential pair; connects to D− or TX− |
| 5 (REF2) | Common cathode reference for Channel B | Internally tied to ground; shares GND net with Pins 2 & 3 for dual-channel operation |
| 6 (I/O3) | Data line input/output channel B | Second protected differential pair; connects to RX+ or another high-speed line |
| 7 (I/O4) | Data line input/output channel B | Complement to Pin 6; completes second differential protection path |
| 8 (REF2) | Redundant REF2 terminal | Additional low-inductance ground connection point for Channel B; enhances surge current handling |
Key Features
| Feature | Design Value |
|---|---|
| Low inter-I/O capacitance | 5–8 pF enables <1% signal rise-time degradation on 480 Mbps USB 2.0 links |
| Four-channel unidirectional protection | Dual differential pair support (e.g., USB D+/D− and IDLE+/IDLE−) with shared ground references |
| IEC 61000-4-5 lightning surge rating | 23 A (8/20 µs) withstand capability meets EN 61000-4-5 Level 3 for industrial port protection |
| UL 94V-0 flammability rating | Ensures PCB-mounted device does not propagate flame during overvoltage fault conditions |
| SO-8 thermal robustness | Rated for 260 °C lead soldering (10 s) and −55 °C to +150 °C operating range |
Applications
| USB 2.0 Interface Protection | Ethernet PHY Line Protection |
|---|---|
Use Scenario: Protecting upstream/downstream USB 2.0 ports on embedded host controllers against user-handling ESD. IC Role / Device Role / Timing Role: Unidirectional TVS array clamping D+ and D− lines to GND before transceiver input pins. Use Value: 5–8 pF capacitance prevents eye-diagram closure; 9.8 V clamping preserves USB receiver's 3.6 V absolute max rating. | Use Scenario: Safeguarding 10/100BASE-TX PHY differential pairs from lightning-induced surges in industrial gateways. IC Role / Device Role / Timing Role: Dual-channel TVS suppressing common-mode transients on MDI/MDI-X pairs while preserving signal skew. Use Value: 500 W peak power and 23 A IEC 61000-4-5 rating enable direct placement before magnetics without external series impedance. |
| HDMI DDC Channel Protection | LVDS Camera Interface Protection |
Use Scenario: Securing HDMI DDC (I²C) lines (SCL/SDA) against hot-plug ESD in AV receivers and set-top boxes. IC Role / Device Role / Timing Role: Low-capacitance bidirectional-capable (via unidirectional topology with GND-referenced cathodes) clamping of 3.3 V I²C bus. Use Value: ≤10 pF inter-pin capacitance avoids violating I²C rise-time spec (≤1000 ns); 6 V VRWM matches 3.3 V rail. | Use Scenario: Shielding automotive-grade LVDS camera links (e.g., rear-view, surround-view) from cable discharge events. IC Role / Device Role / Timing Role: High-speed differential pair protector with matched trace routing support via symmetrical SO-8 pinout. Use Value: 12 V clamping at 10 A ensures CISPR 25 Class 5 transient immunity without degrading 600 Mbps pixel clock timing jitter. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode array applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SP1003-04UTG | Lower capacitance (0.5 pF), bidirectional, SOT-23-4 package, 12 V VBR | Better for RF/analog lines; unsuitable for 5 V digital buses due to higher VBR | Select when ultra-low capacitance is prioritized over multi-channel integration |
| TPD2E001DRYR | 2-channel, 5.5 V VRWM, 12 pF I/O–I/O, DRY (SOT-553) package | Higher capacitance limits use to ≤48 Mbps interfaces; smaller footprint but lower surge rating (350 W) | Choose for space-constrained designs where full 500 W rating is not required |
Compared with SP1003-04UTG and TPD2E001DRYR, the SRDA05-4R2 uniquely delivers four-channel protection in SO-8 with balanced 5–8 pF capacitance and full 500 W/23 A surge capability - making it optimal for integrated high-speed digital interface protection where layout area and multi-line coordination matter.
Availability
SRDA05-4R2 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, industrial Ethernet PHY safeguarding, and LVDS camera link hardening requiring stable component supply across production lifecycles.
Supply support for SRDA05-4R2 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The SRDA05-4R2 belongs to onsemi's transient voltage suppressor portfolio, engineered specifically for high-speed data line protection where low capacitance, precise clamping, and multi-channel integration are essential to maintain signal fidelity under ESD/EFT/lightning stress.
FAQ
What is the polarity configuration of the SRDA05-4R2?
The SRDA05-4R2 is a unidirectional TVS diode array. Its internal structure connects all anodes to I/O pins and cathodes to REF pins, requiring REF pins (2, 3, 5, 8) to be tied to system ground. This configuration protects against positive transients only - negative excursions are blocked by the forward-biased junction, making it ideal for DC-biased data lines like USB 2.0.
Does the SRDA05-4R2 support bidirectional signal lines such as RS-485?
No, the SRDA05-4R2 is unidirectional and not suitable for true bidirectional AC-coupled lines like RS-485 without external biasing. Its design assumes a grounded reference and positive-only clamping. For RS-485, a bidirectional TVS like the SRDA05-4R2's counterpart SRDA05-4R2U (if available) or dedicated bidirectional arrays such as NUP4105MR6T1G would be required.
What is the maximum allowable trace length between SRDA05-4R2 and protected IC inputs?
To maintain effective clamping, trace inductance must be minimized: recommended maximum trace length from SRDA05-4R2 I/O pins to protected IC inputs is 5 mm. Longer traces increase voltage overshoot during fast ESD events (e.g., 15 kV contact discharge), potentially exceeding the IC's absolute maximum rating despite the SRDA05-4R2's 9.8 V clamping specification.
Can SRDA05-4R2 be used to protect a 3.3 V PCIe reference clock line?
No - the SRDA05-4R2 has a 5.0 V working peak reverse voltage and 6.0 V breakdown, which exceeds typical 3.3 V PCIe REFCLK swing (peak-to-peak ~1.0 V, common-mode ~1.65 V). Using it risks forward conduction during normal operation. A lower-VRWM TVS such as the ESD5Z3.3ST5G (3.3 V) is appropriate for PCIe clock line protection.
Is the SRDA05-4R2 RoHS and REACH compliant?
Yes, the SRDA05-4R2 is manufactured in accordance with RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. onsemi confirms Pb-free terminations and halogen-free molding compound for this device, and full compliance documentation is available in the official SRDA05-4R2/D datasheet revision history and material declarations.
SRDA05-4R2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Steering (Rail to Rail)
- Unidirectional Channels:
- 4
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5V
- Voltage - Breakdown (Min):
- 6V
- Voltage - Clamping (Max) @ Ipp:
- 12V
- Current - Peak Pulse (10/1000µs):
- 10A (8/20µs)
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- Yes
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 10pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
SRDA05-4R2 FAQ
1.How can I place an order for SRDA05-4R2 through Aetrix?
Please submit a Request for Quotation (RFQ) for SRDA05-4R2 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 SRDA05-4R2 reliable?
The price and inventory of SRDA05-4R2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SRDA05-4R2 is usually 5 days.
3.What payment methods are accepted for SRDA05-4R2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SRDA05-4R2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SRDA05-4R2?
SRDA05-4R2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SRDA05-4R2 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 SRDA05-4R2?
For technical support, including SRDA05-4R2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SRDA05-4R2 requirements.
6.How does Aetrix verify that SRDA05-4R2 is sourced from the original manufacturer or authorized distributors?
All SRDA05-4R2 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 SRDA05-4R2 meets industry standards.
7.What is the process for return or replacement of SRDA05-4R2?
All SRDA05-4R2 units undergo pre-shipment inspection (PSI). If there is an issue with SRDA05-4R2, 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 SRDA05-4R2 part is unused and in its original packaging.
Return procedure for SRDA05-4R2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SRDA05-4R2 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
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…
