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Diodes Incorporated 1.5KE24A-T
- Part No.:
- 1.5KE24A-T
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE24A-T.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:5,440
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Product details
Overview
1.5KE24A-T from Diodes Incorporated is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, designed for primary overvoltage protection at DC power inputs and signal lines. It features a 20.5V reverse standoff voltage, 22.8V minimum breakdown voltage at 1mA test current, 33.2V maximum clamping voltage at 45A peak pulse current, and operates across -55°C to +175°C.
For engineers reviewing the 1.5KE24A-T datasheet, 1.5KE24A-T pinout, 1.5KE24A-T application, or 1.5KE24A-T equivalent, this part supports robust surge immunity in automotive body electronics, industrial PLC I/O modules, and telecom power supply rails where fast-response, high-energy clamping is required under IEC 61000-4-5 Level 4 stress conditions.
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction to achieve sub-nanosecond response time and stable clamping performance under repetitive 1.0ms 8/20μs surge waveforms. Its axial-leaded DO-201 package enables through-hole mounting with 9.5mm lead length thermal derating and 1.12g mass for mechanical stability.
The device exhibits a voltage temperature coefficient of +0.094%/°C and maintains ≤5μA reverse leakage at 20.5V, ensuring low standby power loss in always-on protection circuits. Its 1500W peak pulse rating is defined at TA = +25°C with linear derating above that ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500W at 1.0ms pulse - sustains single high-energy transients like lightning-induced surges on 24V DC bus lines |
| Reverse Standoff Voltage | 20.5V - maximum continuous operating voltage before significant leakage begins; sets system DC rail margin |
| Breakdown Voltage | 22.8V min @ 1mA - guaranteed conduction onset under controlled test; defines lower bound of clamping threshold |
| Clamping Voltage | 33.2V max @ 45A - limits voltage seen by downstream ICs during worst-case 8/20μs surge events |
| Operating Temperature | -55°C to +175°C - supports under-hood automotive and industrial environments without derating |
| Leakage Current | ≤5.0μA @ 20.5V - negligible standby power draw in battery-backed or energy-sensitive systems |
| Package | DO-201 - axial-leaded, transfer-molded epoxy housing rated UL 94V-0; compatible with standard wave-solder processes |
Pinout & Package
DO-201 package: axial-leaded, cylindrical glass-passivated body with cathode band marking for unidirectional polarity. Leads are tin-finished, solderable per MIL-STD-202 Method 208, and spaced for 0.2" PCB pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to circuit ground or lowest potential point; establishes clamping reference for positive transients |
| Cathode | Protected line input | Connected to line being protected (e.g., 24V rail); conducts surge current to ground when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die construction | Enables stable long-term reliability and reduced parameter drift under thermal cycling and humidity exposure |
| 1500W peak pulse rating | Meets IEC 61000-4-5 Level 4 (4kV/2Ω) surge immunity requirements for industrial and automotive applications |
| Fast response time | Sub-nanosecond junction turn-on ensures clamping occurs before sensitive downstream components experience overvoltage stress |
| RoHS-compliant, halogen-free | Meets EU Directive 2015/863/EU with <900ppm Br, <900ppm Cl, <1000ppm Sb - supports green manufacturing and end-of-life compliance |
| Wide operating temperature range | -55°C to +175°C operation allows deployment in engine control units, motor drives, and outdoor telecom equipment |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Module |
|---|---|
|
Use Scenario: Protecting 24V CAN/LIN bus power rails against load dump and jump-start transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed between fused 24V supply and LDO regulator input. Use Value: Limits transient voltage to ≤33.2V, preventing damage to 3.3V/5V logic supplies and microcontroller power domains. |
Use Scenario: Safeguarding 24V optocoupler input circuits from field-wiring induced surges in factory automation. IC Role / Device Role / Timing Role: Front-end surge suppression before signal conditioning and isolation stages. Use Value: Absorbs up to 1500W for 1ms without degradation, maintaining signal integrity and reducing false-trigger events. |
| Telecom AC/DC Adapter Output | Medical Diagnostic Equipment Power Entry |
|
Use Scenario: Secondary-side clamping on 24V output of isolated flyback converters used in base station radios. IC Role / Device Role / Timing Role: Final-stage transient filter before connector interface to external peripherals. Use Value: Clamps ESD and conducted noise to safe levels while adding no capacitance or leakage that affects regulation accuracy. |
Use Scenario: Overvoltage protection on auxiliary 24V DC power inputs for imaging subsystems subject to hospital-grade surge testing. IC Role / Device Role / Timing Role: Fail-safe shunt element compliant with IEC 60601-1 3rd edition surge requirements. Use Value: Maintains specified clamping performance across full medical temperature range (-25°C to +60°C ambient). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24A | Lower 600W peak power; SMC (DO-214AB) surface-mount package; 36.5V clamping at 24.2A | Designed for PCB space-constrained designs requiring automated assembly; not suitable for high-energy 1.5kW surges | Select SMBJ24A only when board layout mandates SMT and surge threat level is ≤IEC 61000-4-5 Level 3 |
| 1N6267A | Same DO-201 package; 1500W rating; higher 36.0V clamping at 42A; 21.2V standoff | Looser voltage tolerance increases risk of nuisance clamping on noisy 24V rails with ripple | Prefer 1.5KE24A-T where precise 20.5V standoff and tighter 33.2V clamping are required for margin-critical designs |
Compared with SMBJ24A and 1N6267A, the 1.5KE24A-T delivers superior clamping precision (33.2V vs. ≥36V), tighter voltage tolerance (±5% vs. ±10%), and verified DO-201 axial-leaded robustness for high-reliability through-hole deployments.
Availability
1.5KE24A-T is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O protection, and telecom power supply design requiring stable component supply and traceable sourcing.
Supply support for 1.5KE24A-T 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
Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal devices, with design centers across Asia, Europe, and the US.
The 1.5KE series belongs to Diodes' transient voltage suppressor product line, engineered specifically for high-energy surge protection in automotive, industrial, and communications infrastructure applications.
FAQ
What is the difference between 1.5KE24A-T and 1.5KE24CA-T?
The 1.5KE24A-T is unidirectional with cathode band marking and clamps only positive transients relative to ground; the 1.5KE24CA-T is bidirectional, marked without cathode band, and clamps both polarities symmetrically. Their breakdown voltages differ slightly: 22.8V min (A) vs. 22.8V min (CA), but CA has identical standoff and clamping specs for AC-coupled or floating-line protection.
Can 1.5KE24A-T be used in place of a Zener diode for voltage regulation?
No - it is not designed for continuous regulation. The 1.5KE24A-T operates only during transient overvoltage events and lacks the stable dynamic impedance and low-power dissipation characteristics of Zener regulators. Its 5W steady-state rating applies only at TL = 75°C with specific lead length; sustained DC operation will cause thermal runaway.
Is 1.5KE24A-T qualified to AEC-Q101 for automotive use?
No - while Diodes offers AEC-Q101-qualified TVS diodes (e.g., DZxx family), the 1.5KE24A-T is not AEC-Q101 certified. Its datasheet states automotive qualification requires special change control and PPAP capability; this part is intended for general industrial and commercial applications unless explicitly requalified.
What is the maximum surge current 1.5KE24A-T can handle without degradation?
It handles 45A peak pulse current at 33.2V clamping voltage under standardized 1.0ms exponential waveform (per JEDEC JESD22-A115). Repeated surges must respect thermal derating curves; single-event survivability is confirmed up to 45A, but cumulative energy exceeding 1500W·ms causes permanent parametric shift or failure.
1.5KE24A-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 20.5V
- Voltage - Breakdown (Min):
- 22.8V
- Voltage - Clamping (Max) @ Ipp:
- 33.2V
- Current - Peak Pulse (10/1000µs):
- 45A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201
1.5KE24A-T FAQ
1.How can I place an order for 1.5KE24A-T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE24A-T 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 1.5KE24A-T reliable?
The price and inventory of 1.5KE24A-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE24A-T is usually 5 days.
3.What payment methods are accepted for 1.5KE24A-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE24A-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE24A-T?
1.5KE24A-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE24A-T 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 1.5KE24A-T?
For technical support, including 1.5KE24A-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE24A-T requirements.
6.How does Aetrix verify that 1.5KE24A-T is sourced from the original manufacturer or authorized distributors?
All 1.5KE24A-T 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 1.5KE24A-T meets industry standards.
7.What is the process for return or replacement of 1.5KE24A-T?
All 1.5KE24A-T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE24A-T, 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 1.5KE24A-T part is unused and in its original packaging.
Return procedure for 1.5KE24A-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE24A-T Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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