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onsemi ICTE-12RL4G
- Part No.:
- ICTE-12RL4G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
ICTE-12RL4G.pdf
- Description:
- TVS DIODE 12VWM 21.2VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:3,861
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Product details
Overview
ICTE-12RL4G from onsemi is a unidirectional transient voltage suppressor (TVS) diode in axial-leaded Surmetic package, designed for parallel protection of sensitive electronics against high-energy transients. It features 12 V working peak reverse voltage (VRWM), 1500 W peak pulse power (1 ms), clamping voltage of 21.2 V at 70 A peak pulse current (IPP), and sub-1 ns response time. It is used in industrial power supplies and communication interfaces to safeguard CMOS/MOS ICs.
For engineers reviewing the ICTE-12RL4G datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM matching system DC bias, VC margin relative to IC absolute maximum ratings, surge current capability under IEC 61000-4-5 waveform, and axial lead thermal derating above 75°C.
Technical Context
The ICTE-12RL4G operates as a Zener-based clamping device with avalanche breakdown triggered at nominal 14.1 V (VBR @ IT = 1 A). Its low dynamic impedance ensures stable clamping during 8.3 ms half-sine surges up to 70 A, while its <1 ns intrinsic response minimizes voltage overshoot when mounted close to protected circuitry.
Designed for non-repetitive transient suppression, it complies with Class 3 ESD (>16 kV HBM) and exhibits <2 μA leakage at 12 V. Thermal performance is defined by 20 °C/W junction-to-lead resistance and 5.0 W steady-state dissipation at TL ≤ 75°C with 3/8″ lead length.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 12 V - Maximum continuous reverse operating voltage before clamping begins; must exceed circuit's DC or peak AC rail. |
| VC @ IPP | 21.2 V @ 70 A - Clamped voltage during 1 ms transient; defines worst-case stress on downstream ICs. |
| PPK | 1500 W @ 1 ms - Peak surge energy handling per non-repetitive pulse; validated per Figure 5 waveform. |
| VBR | 14.1 V (nominal) @ 1 A - Breakdown onset voltage; controls turn-on threshold and clamping consistency. |
| Response Time | <1 ns - Intrinsic avalanche delay; enables suppression before most logic-level transients propagate. |
| Leakage Current | <2 μA @ 12 V - Negligible standby power loss; avoids loading low-power sensor or control rails. |
| ESD Rating | Class 3 (>16 kV HBM) - Meets IEC 61000-4-2 Level 4 for robust board-level ESD immunity. |
Pinout & Package
ICTE-12RL4G uses an axial-leaded plastic package (Case 41A), with cathode identified by a polarity band. Leads are tin-plated, solderable at 260°C for 10 seconds at 1/16″ from case.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path | Connected to ground or low-impedance reference; completes clamping loop during overvoltage events. |
| Cathode | Protected line connection | Connected to signal/power line being safeguarded; conducts avalanche current when VRWM exceeded. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse rating | Supports IEC 61000-4-5 Level 4 surge testing (4 kV line-to-earth) without failure. |
| Clamping ratio VC/VBR = 1.5 | Ensures predictable voltage margin between breakdown and clamp; simplifies safe operating area analysis. |
| Low zener impedance | Maintains tight VC tolerance across production lot and temperature; critical for consistent protection in automotive ECUs. |
| Pb-Free Surmetic package | Meets RoHS Directive 2011/65/EU; compatible with lead-free reflow and wave soldering processes. |
| −65°C to +175°C operation | Enables deployment in under-hood automotive modules and industrial motor drives with wide ambient swings. |
Applications
| Industrial Power Supply Protection | Telecom Line Interface |
|---|---|
Use Scenario: Protects 12 V DC output rails of switch-mode power supplies against load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Unidirectional TVS clamps reverse transients on regulated output, preventing latch-up or gate oxide damage in downstream regulators and microcontrollers. Use Value: Withstands 1500 W surges while limiting voltage to 21.2 V-well below 24 V absolute max ratings of common PMICs and LDOs. | Use Scenario: Shields RS-485 transceivers and line drivers connected to long external cables exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Placed across differential pair or single-ended data lines to shunt common-mode transients before they reach IC input structures. Use Value: Sub-1 ns response prevents transient propagation into receiver front-end; 70 A IPP handles 10/700 µs telecom surge waveforms. |
| Medical Equipment Input Stage | PLC Digital I/O Protection |
Use Scenario: Guards isolated 12 V auxiliary rails powering analog front-ends and ADC references in diagnostic imaging systems. IC Role / Device Role / Timing Role: Mounted at board edge to clamp ESD and fast-rising transients entering via connectors or sensors. Use Value: Class 3 ESD rating (>16 kV HBM) and <2 μA leakage preserve signal integrity and low-noise performance in precision measurement paths. | Use Scenario: Protects 24 V digital input circuits in programmable logic controllers from field-wiring induced transients and relay coil kickback. IC Role / Device Role / Timing Role: Connected between input terminal and ground to clamp positive-going surges on dry-contact or PNP-sourced inputs. Use Value: 12 V VRWM matches standard 24 V PLC input thresholds; 21.2 V VC stays below 30 V abs-max ratings of optocoupler input LEDs and interface ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12A | Surface-mount SMB package; 12 V VRWM; 23.2 V VC @ 62.1 A; 600 W PPK | Lower peak power and different form factor limit use in high-energy industrial surges; better suited for PCB space-constrained designs. | Select SMBJ12A only if layout allows SMT placement and surge requirements are ≤600 W. |
| 1N6376RL4G | Same axial package, Pb-Free, identical electrical specs; ON Semiconductor direct variant with JEDEC marking | No functional difference; identical VRWM, VC, IPP, and thermal specs; differs only in part numbering convention. | 1N6376RL4G is a functionally identical alternative with same datasheet and qualification-use where JEDEC-compliant labeling is required. |
Compared with ICTE-12RL4G, SMBJ12A offers smaller footprint but reduced surge capacity, while 1N6376RL4G provides identical protection in JEDEC-marked format-enabling drop-in substitution where documentation mandates JEDEC nomenclature.
Availability
ICTE-12RL4G is available at Aetrix Electronics and suitable for industrial power supplies, telecom line interfaces, medical equipment input stages, and PLC digital I/O circuits requiring stable component supply and long-term obsolescence management.
Supply support for ICTE-12RL4G 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 ICTE series belongs to onsemi's Mosorb transient voltage suppressor product line, engineered specifically for high-reliability, high-surge industrial and communications infrastructure where axial-leaded robustness and repeatable clamping performance are essential.
FAQ
What is the clamping voltage of ICTE-12RL4G at its rated peak pulse current?
The ICTE-12RL4G has a maximum clamping voltage (VC) of 21.2 V at 70 A peak pulse current (IPP), measured under the standardized 1 ms exponential waveform per Figure 5 in the datasheet. This value defines the upper voltage limit imposed on protected circuitry during a full-rated surge event and is critical for ensuring compatibility with downstream ICs' absolute maximum ratings. The ICTE-12RL4G maintains this clamping performance across its qualified temperature range.
Is ICTE-12RL4G suitable for bidirectional transient protection?
No, ICTE-12RL4G is a unidirectional TVS diode and is not rated for reverse surge suppression. Its design clamps only positive transients on the cathode side relative to anode (ground). For bidirectional protection-such as AC lines or differential data buses-two ICTE-12RL4G devices in series-opposing configuration or a dedicated bidirectional part like P6SMB12CA must be used. The ICTE-12RL4G datasheet explicitly specifies unidirectional operation.
What is the maximum steady-state power dissipation for ICTE-12RL4G at 75°C lead temperature?
The ICTE-12RL4G has a steady-state power dissipation (PD) rating of 5.0 W at a lead temperature (TL) of 75°C with 3/8″ lead length. Above 75°C, PD derates linearly at 20 mW/°C, reaching zero at 100°C. This thermal limit applies only to continuous DC or low-frequency reverse bias conditions-not transient events-and must be verified using actual board-level thermal measurements. The ICTE-12RL4G's RJL of 20 °C/W supports this rating.
Does ICTE-12RL4G meet RoHS and lead-free soldering requirements?
Yes, ICTE-12RL4G is a Pb-Free device compliant with the EU RoHS Directive 2011/65/EU. Its Surmetic axial package is qualified for lead-free soldering at 260°C for 10 seconds at 1/16″ from the case body. The "G" suffix in the part number explicitly denotes Pb-Free construction, and the device meets J-STD-020 moisture sensitivity level (MSL) requirements for standard assembly processes. ICTE-12RL4G's finish is compatible with both wave and reflow soldering.
How does the leakage current of ICTE-12RL4G compare to other 12 V TVS diodes?
The ICTE-12RL4G specifies maximum reverse leakage current (IR) of 2.0 μA at its 12 V VRWM, which is typical for high-reliability Zener TVS diodes in this voltage class. This value is lower than many legacy 1N6xxx-series parts and comparable to modern alternatives like SMBJ12A (5.0 μA). Low leakage preserves signal integrity in high-impedance sensor or reference circuits and reduces standby power loss in battery-operated systems. The ICTE-12RL4G's leakage remains stable across −65°C to +175°C.
ICTE-12RL4G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-201AD, Axial
- Series:
- Mosorb™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 12V
- Voltage - Breakdown (Min):
- 14.1V
- Voltage - Clamping (Max) @ Ipp:
- 21.2V
- Current - Peak Pulse (10/1000µs):
- 70A (8/20µs)
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
ICTE-12RL4G FAQ
1.How can I place an order for ICTE-12RL4G through Aetrix?
Please submit a Request for Quotation (RFQ) for ICTE-12RL4G 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 ICTE-12RL4G reliable?
The price and inventory of ICTE-12RL4G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICTE-12RL4G is usually 5 days.
3.What payment methods are accepted for ICTE-12RL4G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICTE-12RL4G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICTE-12RL4G?
ICTE-12RL4G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICTE-12RL4G 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 ICTE-12RL4G?
For technical support, including ICTE-12RL4G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICTE-12RL4G requirements.
6.How does Aetrix verify that ICTE-12RL4G is sourced from the original manufacturer or authorized distributors?
All ICTE-12RL4G 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 ICTE-12RL4G meets industry standards.
7.What is the process for return or replacement of ICTE-12RL4G?
All ICTE-12RL4G units undergo pre-shipment inspection (PSI). If there is an issue with ICTE-12RL4G, 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 ICTE-12RL4G part is unused and in its original packaging.
Return procedure for ICTE-12RL4G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ICTE-12RL4G 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
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