My Inquiry
My Account
onsemi 1.5KE15CARL4
- Part No.:
- 1.5KE15CARL4
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- -
- Datasheet:
-
1.5KE15CARL4.pdf
- Description:
- TRANS VOLTAGE SUPPRESSOR DIODE
- Quantity:
- Payment:
- Shipping:
Inventory:9,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5KE15CARL4 from ON Semiconductor is a bidirectional 1500 W transient voltage suppressor (TVS) diode designed for parallel clamping protection of sensitive electronics against ESD, lightning surges, and inductive switching transients. It features a 12.8 V working peak reverse voltage (VRWM), 21.2 V maximum clamping voltage at 71 A peak pulse current, and <5 μA leakage above VRWM, commonly deployed in industrial power supplies and communication interface circuits.
For engineers reviewing the 1.5KE15CARL4 datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage margin relative to protected IC VCC, peak pulse current handling under IEC 61000-4-5 waveforms, UL 497B recognition for isolated loop protection, and axial leaded Case 41A mechanical compatibility with through-hole PCB layouts.
Technical Context
This device operates as a voltage-clamping Zener-based TVS, leveraging avalanche breakdown in both polarities to limit transient overvoltage across protected lines. Its bidirectional symmetry ensures identical clamping behavior for positive and negative transients without polarity dependence.
It delivers 1500 W nonrepetitive peak pulse power per 1 ms waveform (Figure 4), with thermal resistance of 20 °C/W from junction to lead and operating temperature range from −65 °C to +175 °C - enabling robust performance in high-ambient industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 12.8 V - Maximum continuous DC or peak AC voltage the device blocks without clamping; sets minimum system operating voltage margin. |
| VC @ IPP | 21.2 V @ 71 A - Clamped voltage during 1 ms surge; defines worst-case overvoltage seen by downstream circuitry. |
| IPP | 71 A - Peak pulse current capability at rated clamping voltage; determines survivability under IEC 61000-4-5 Level 4 (4 kV/2 Ω) surges. |
| Leakage Current | <5 μA @ VRWM - Negligible standby power loss and signal integrity impact in high-impedance monitoring or bias networks. |
| Response Time | <1 ns - Fast enough to clamp ESD events (IEC 61000-4-2) before damage occurs to CMOS/MOS inputs. |
| UL Recognition | UL 497B - Certified for use in isolated loop circuit protection, meeting safety requirements for telecom and process control interfaces. |
Pinout & Package
Package: Axial-leaded plastic case per ON Semiconductor Case 41A (ISSUE D), with void-free thermosetting molding, corrosion-resistant finish, and solderable leads rated for 230 °C at 1/16″ from case for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during negative transients | Connects to line being protected; bidirectional operation means no fixed polarity assignment required. |
| Cathode | Current entry terminal during positive transients | Marked with band but does not imply unidirectional polarity; functions identically to anode under reverse surge conditions. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical electrical response for ± transients - eliminates need for dual-device placement or polarity-aware layout. |
| 1500 W peak pulse rating | Supports high-energy surge immunity per IEC 61000-4-5 up to 4 kV open-circuit / 2 Ω source impedance. |
| ESD Class 3 (>16 kV HBM) | Meets stringent electrostatic discharge immunity for handling and board-level integration without additional ESD buffers. |
| Low zener impedance | Minimizes voltage overshoot during fast-rising transients due to reduced dynamic impedance near breakdown. |
Applications
| Industrial Power Supply Input Protection | RS-485/422 Data Line Clamp |
|---|---|
Use Scenario: Protecting AC/DC converter input stages from lightning-induced surges on mains-connected equipment. IC Role / Device Role / Timing Role: Parallel-connected voltage clamp placed between line and neutral or line and earth to shunt surge energy away from rectifier and bulk capacitor. Use Value: Limits transient voltage to ≤21.2 V, preventing overvoltage failure of bridge rectifiers and electrolytic capacitors rated for 25–35 V. | Use Scenario: Safeguarding differential bus transceivers in factory automation networks exposed to ground potential differences. IC Role / Device Role / Timing Role: Bidirectional TVS placed across A/B data lines and referenced to signal ground to clamp common-mode and differential surges. Use Value: Maintains signal integrity by clamping transients before they exceed receiver input absolute maximum ratings (±12 V typical), avoiding latch-up or permanent damage. |
| Medical Equipment ESD Shielding | Programmable Logic Controller (PLC) I/O Protection |
Use Scenario: Adding secondary surge immunity to front-panel USB or serial ports on diagnostic imaging devices. IC Role / Device Role / Timing Role: Low-leakage (<5 μA) TVS installed at connector entry point to absorb HBM ESD without loading low-power sensor interfaces. Use Value: Enables compliance with IEC 61000-4-2 Level 4 (15 kV air/8 kV contact) while preserving microamp-level bias currents in analog front-ends. | Use Scenario: Protecting digital input modules from inductive kickback when switching solenoids or relays in harsh industrial settings. IC Role / Device Role / Timing Role: Mounted directly at terminal block to clamp fast-rising transients induced by relay coil de-energization (dV/dt > 100 V/ns). Use Value: Prevents false triggering or latch-up in optocoupler input stages by limiting transient voltage to safe levels within 1 ns response window. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15CA | 600 W peak power, SMC package, lower IPP (32.4 A), same VRWM (12.8 V) and VC (21.2 V) | Suitable for space-constrained PCBs but lacks 1500 W surge headroom for high-energy mains-side protection. | Select SMBJ15CA only when board area is critical and surge threat level is limited to IEC 61000-4-5 Level 2 (1 kV). |
| 1.5SMC15CA | Same 1500 W rating and electrical specs, but SMC surface-mount package instead of axial leaded Case 41A | Requires rework of footprint and assembly process; not drop-in compatible with through-hole designs. | Choose 1.5SMC15CA only for new SMT-only designs where automated placement and smaller footprint justify redesign effort. |
Compared with SMBJ15CA and 1.5SMC15CA, the 1.5KE15CARL4 provides higher surge robustness in axial-leaded form factor - making it optimal for legacy through-hole industrial power supplies and field-serviceable equipment where mechanical reliability and hand-soldering compatibility are prioritized.
Availability
1.5KE15CARL4 is available at Aetrix Electronics and suitable for industrial power supplies, RS-485 communication interfaces, medical equipment ESD shielding, and PLC I/O protection requiring stable component supply and long-term obsolescence management.
Supply support for 1.5KE15CARL4 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
ON Semiconductor is a global semiconductor manufacturer specializing in power management, analog, sensors, and discrete devices for automotive, industrial, and cloud power applications.
The 1.5KExxCA series belongs to ON Semiconductor's Mosorb™ TVS portfolio, engineered specifically for high-energy transient suppression in rugged industrial and infrastructure systems where reliability under repeated surge stress is mandatory.
FAQ
What is the clamping voltage of the 1.5KE15CARL4 under maximum rated surge current?
The 1.5KE15CARL4 has a maximum clamping voltage (VC) of 21.2 V when subjected to its rated peak pulse current (IPP) of 71 A, measured using the standard 1 ms exponential waveform defined in Figure 4 of the datasheet. This value ensures protected circuits remain below critical overvoltage thresholds during surge events. The 1.5KE15CARL4 maintains this clamping performance across its full operating temperature range.
Is the 1.5KE15CARL4 suitable for protecting RS-485 bus lines?
Yes, the 1.5KE15CARL4 is widely used for RS-485 bus protection due to its bidirectional clamping, 21.2 V clamping voltage compatible with ±12 V transceiver rails, and 71 A surge current capability sufficient for IEC 61000-4-5 Level 3 (2 kV). Its axial leaded Case 41A package allows direct mounting at connectors. The 1.5KE15CARL4 meets UL 497B for isolated loop applications, reinforcing its suitability for industrial data links.
Does the 1.5KE15CARL4 have UL recognition, and for what standard?
Yes, the 1.5KE15CARL4 carries UL recognition under UL 497B for protectors, with File #116110. This certification validates its use in isolated loop circuit protection - including telecom interfaces, process control signal conditioning, and medical isolation barriers. UL 497B testing covers strike voltage breakdown, endurance conditioning, dielectric withstand, and discharge performance. The 1.5KE15CARL4 shares this recognition with the full 1.5KE6.8CA–1.5KE250CA family.
What is the working peak reverse voltage (VRWM) specification for the 1.5KE15CARL4?
The 1.5KE15CARL4 has a working peak reverse voltage (VRWM) of 12.8 V, meaning it reliably blocks voltages up to this level in normal operation without entering conduction. This parameter is critical for selecting appropriate overvoltage margin - for example, pairing the 1.5KE15CARL4 with a 12 V nominal system ensures ≥0.8 V headroom before clamping initiates. The 1.5KE15CARL4's VRWM is guaranteed across its full −65 °C to +175 °C operating temperature range.
How does the 1.5KE15CARL4 differ from unidirectional TVS diodes like the 1.5KE15A?
The 1.5KE15CARL4 is bidirectional, providing symmetrical clamping for both positive and negative transients, whereas the 1.5KE15A is unidirectional and only clamps in one polarity. This makes the 1.5KE15CARL4 ideal for AC-coupled or floating signal lines (e.g., RS-485, audio, sensor bridges), while the 1.5KE15A suits DC-biased rails like VCC or ground-referenced signals. Both share identical VRWM (12.8 V), VC (21.2 V), and PPK (1500 W), but the 1.5KE15CARL4's bidirectionality eliminates polarity concerns in layout.
1.5KE15CARL4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- -
- Series:
- *
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- -
- Unidirectional Channels:
- -
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- -
- Voltage - Breakdown (Min):
- -
- Voltage - Clamping (Max) @ Ipp:
- -
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- -
- Power Line Protection:
- -
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
1.5KE15CARL4 FAQ
1.How can I place an order for 1.5KE15CARL4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE15CARL4 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 1.5KE15CARL4 reliable?
The price and inventory of 1.5KE15CARL4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE15CARL4 is usually 5 days.
3.What payment methods are accepted for 1.5KE15CARL4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE15CARL4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE15CARL4?
1.5KE15CARL4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE15CARL4 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 1.5KE15CARL4?
For technical support, including 1.5KE15CARL4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE15CARL4 requirements.
6.How does Aetrix verify that 1.5KE15CARL4 is sourced from the original manufacturer or authorized distributors?
All 1.5KE15CARL4 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 1.5KE15CARL4 meets industry standards.
7.What is the process for return or replacement of 1.5KE15CARL4?
All 1.5KE15CARL4 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE15CARL4, 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 1.5KE15CARL4 part is unused and in its original packaging.
Return procedure for 1.5KE15CARL4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE15CARL4 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…
