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Diodes Incorporated 1.5KE30A-T
- Part No.:
- 1.5KE30A-T
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE30A-T.pdf
- Description:
- TVS DIODE 25.6VWM 41.4VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:6,202
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Product details
Overview
1.5KE30A-T from Diodes Incorporated is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 axial package, designed for primary overvoltage protection of DC power rails and signal lines. It features a 25.6V reverse standoff voltage, 28.5V minimum breakdown voltage at 1mA test current, 41.4V maximum clamping voltage at 36A peak pulse current, and operates across –55°C to +175°C.
For engineers reviewing the 1.5KE30A-T datasheet, 1.5KE30A-T pinout, 1.5KE30A-T application, or 1.5KE30A-T equivalent, this device is selected for robust surge immunity in industrial power supplies, automotive body electronics, and telecom interface protection where fast response (<1ns), low leakage (<5μA @ 25.6V), and stable voltage temperature coefficient (+0.097%/°C) are critical.
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction to achieve sub-nanosecond response to ESD and lightning-induced transients. Its clamping behavior is defined by a sharp avalanche breakdown with tightly controlled VBR tolerance (±5%) and low dynamic impedance under 1.0ms 8/20μs pulse conditions.
The device is rated for 1500W peak pulse power (tP = 1.0ms), 5.0W steady-state dissipation at 75°C lead temperature, and supports 200A non-repetitive forward surge current. Its DO-201 package enables axial through-hole mounting with tin-plated leads compliant to MIL-STD-202 Method 208.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500 W - sustains single 1.0ms transient surges without failure |
| Reverse Standoff Voltage (VRWM) | 25.6 V - maximum continuous DC voltage before significant leakage |
| Breakdown Voltage (VBR) | 28.5 V min @ 1.0 mA - precise avalanche initiation threshold for reliable clamping onset |
| Clamping Voltage (VC) | 41.4 V max @ 36 A - limits downstream circuit voltage during worst-case 8/20μs surge |
| Leakage Current (IR) | <5.0 μA @ 25.6 V - ensures minimal standby power loss in always-on systems |
| Operating Temperature | –55°C to +175°C - qualified for under-hood automotive and industrial environments |
| Temp. Coefficient (αVBR) | +0.097 %/°C - predictable VBR drift enables accurate system-level margining |
Pinout & Package
Package: DO-201 axial leaded package with transfer-molded epoxy body (UL 94V-0), 1.12g mass, and tin-plated leads. Cathode identified by band marking on unidirectional variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink during reverse-biased clamping | Connected to protected line; conducts surge current to ground when VLINE exceeds VRWM |
| Cathode | Reference terminal / clamping control node | Connected to system ground or lower-potential rail; defines polarity and clamping reference point |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die construction | Enables stable avalanche characteristics and long-term reliability under repeated surge stress |
| 1500W peak pulse rating (1.0ms) | Provides headroom for IEC 61000-4-5 Level 4 (4kV) surge compliance in 2Ω/12Ω source impedance setups |
| Fast response time (<1 ns) | Clamps transients before sensitive ICs experience overstress, reducing need for additional filtering |
| RoHS-compliant, halogen-free "Green" design | Meets automotive and industrial environmental requirements without compromising electrical performance |
| Axial DO-201 package with solderable leads | Supports wave and hand-soldering per MIL-STD-202 Method 208; compatible with legacy PCB layouts |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Protecting 24V DC input rails in programmable logic controllers (PLCs) against load dump and inductive switching spikes. IC Role / Device Role: Primary overvoltage clamp placed between input connector and upstream DC-DC converter. Use Value: Limits transient voltage to ≤41.4V, preventing damage to 36V-rated input capacitors and controller ICs. |
Use Scenario: Safeguarding LIN bus transceivers and microcontroller I/O pins from battery reversal and jump-start surges. IC Role / Device Role: Unidirectional TVS on VCC supply line upstream of LDO regulators. Use Value: Withstands 200A surge pulses while maintaining <5μA leakage at 25.6V, preserving sleep-mode current budget. |
| Telecom Interface Surge Protection | Renewable Energy Charge Controller |
Use Scenario: Shielding RS-485 transceiver power and data lines from induced lightning surges in outdoor base stations. IC Role / Device Role: Rail-to-rail TVS pair (with bidirectional counterpart) on VDD and differential bus lines. Use Value: Clamps 1kV/0.5kA 10/700μs telecom surges within 41.4V, meeting ITU-T K.21 basic protection level. |
Use Scenario: Protecting MPPT controller MOSFET gate drivers and sensor inputs from solar panel string voltage transients. IC Role / Device Role: Input-stage TVS on PV+ and battery+ terminals exposed to open-circuit voltage spikes up to 300V. Use Value: Stable +0.097%/°C VBR drift ensures consistent clamping across –40°C to +85°C ambient operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30A (Diodes Inc.) | Same VRWM (25.6V) but SMB package; 600W PPK, lower IPP (32.4A), surface-mount only | Used where board space is constrained and surge levels are ≤IEC 61000-4-5 Level 3 | Select when transitioning from through-hole to SMT and peak surge energy is reduced |
| 1.5SMC30A (ON Semiconductor) | Identical DO-201 package and ratings (1500W, VRWM=25.6V, VC=41.4V), but ±5% VBR tolerance vs. ±3.5% for 1.5KE30A-T | Acceptable in cost-sensitive industrial designs where tighter VBR distribution is not required | Choose for second-source assurance with identical mechanical fit and thermal profile |
Compared with SMBJ30A and 1.5SMC30A, the 1.5KE30A-T offers superior surge handling in axial through-hole form factor and tighter breakdown voltage control-critical for high-reliability 24V systems where clamping consistency directly impacts downstream component lifetime.
Availability
1.5KE30A-T is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, and telecom interface protection requiring stable component supply and long-lifecycle support.
Supply support for 1.5KE30A-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 manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The 1.5KE series belongs to Diodes' high-power TVS portfolio, engineered specifically for robust front-end surge protection in harsh-environment applications including automotive, industrial automation, and infrastructure equipment.
FAQ
Is 1.5KE30A-T RoHS and REACH compliant?
Yes, 1.5KE30A-T meets EU Directive 2011/65/EU (RoHS 2) and 2015/863/EU (RoHS 3), with lead-free finish and halogen/antimony-free "Green" construction (<900ppm Br, <900ppm Cl, <1000ppm Sb). Compliance documentation is available via Diodes Incorporated's quality portal.
What is the maximum allowable lead temperature during soldering?
The DO-201 package supports lead temperatures up to 260°C for 10 seconds during wave or hand soldering, per MIL-STD-202 Method 208. Preheating to 150°C is recommended to minimize thermal shock; peak temperature must not exceed 260°C at the lead-to-body junction.
Can 1.5KE30A-T be used in bidirectional configurations?
No-1.5KE30A-T is unidirectional only. For bidirectional protection at the same voltage rating, use 1.5KE30CA-T, which has identical standoff, breakdown, and clamping parameters but symmetrical avalanche behavior for AC or floating-line applications.
How does temperature affect its clamping performance?
VBR increases linearly with junction temperature at +0.097%/°C; thus, at 125°C, VBR rises ~9.7% above its 25°C value. Clamping voltage VC also increases slightly with temperature, requiring derating of surge energy in high-ambient designs above 75°C.
1.5KE30A-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):
- 25.6V
- Voltage - Breakdown (Min):
- 28.5V
- Voltage - Clamping (Max) @ Ipp:
- 41.4V
- Current - Peak Pulse (10/1000µs):
- 36A
- 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
1.5KE30A-T FAQ
1.How can I place an order for 1.5KE30A-T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE30A-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 1.5KE30A-T reliable?
The price and inventory of 1.5KE30A-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE30A-T is usually 5 days.
3.What payment methods are accepted for 1.5KE30A-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE30A-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE30A-T?
1.5KE30A-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE30A-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 1.5KE30A-T?
For technical support, including 1.5KE30A-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE30A-T requirements.
6.How does Aetrix verify that 1.5KE30A-T is sourced from the original manufacturer or authorized distributors?
All 1.5KE30A-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 1.5KE30A-T meets industry standards.
7.What is the process for return or replacement of 1.5KE30A-T?
All 1.5KE30A-T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE30A-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 1.5KE30A-T part is unused and in its original packaging.
Return procedure for 1.5KE30A-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE30A-T Tags
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Diodes Incorporated
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Diodes Incorporated
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