My Inquiry
My Account
Diodes Incorporated 1.5KE300A-T
- Part No.:
- 1.5KE300A-T
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE300A-T.pdf
- Description:
- TVS DIODE 256VWM 414VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:7,920
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5KE300A-T from Diodes Incorporated is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, designed for primary overvoltage protection of DC power rails and signal lines. It features a 256V reverse standoff voltage (VRWM), 285–315V breakdown range (VBR), 414V clamping voltage (VC) at 5A peak pulse current, and operates across –55°C to +175°C.
For engineers reviewing the 1.5KE300A-T datasheet, 1.5KE300A-T pinout, 1.5KE300A-T application, or 1.5KE300A-T equivalent, key selection criteria include clamping voltage margin relative to protected IC VDD, peak pulse power handling under IEC 61000-4-5 surge waveforms, thermal derating above +25°C, and axial lead solderability per MIL-STD-202.
Technical Context
This TVS diode uses a glass-passivated silicon junction to achieve fast response time (<1.0 ns) and stable clamping under repetitive transients. Its unidirectional configuration provides low-leakage operation below VRWM (5.0 µA max @ 256V) while enabling robust surge suppression during positive-going surges on grounded-line systems.
The device is rated for 1500W non-repetitive peak pulse power (tp = 1.0 ms, 10/1000 µs waveform), with steady-state power dissipation of 5.0W at TL = 75°C. Its voltage temperature coefficient (+0.110%/°C) ensures predictable VBR drift across automotive and industrial operating ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500W - withstands IEC 61000-4-5 Level 4 (4kV) surge without failure |
| Reverse Standoff Voltage (VRWM) | 256V - maximum continuous DC voltage before significant leakage begins |
| Breakdown Voltage (VBR) | 285–315V @ 1mA - guaranteed conduction onset window for reliable triggering |
| Clamping Voltage (VC) | 414V @ 5A - limits downstream voltage stress during transient events |
| Peak Pulse Current (IPP) | 5.0A - maximum surge current supported at specified VC |
| Operating Temperature | –55°C to +175°C - supports under-hood automotive and industrial power supply designs |
| Leakage Current (IR) | 5.0 µA max @ VRWM - minimizes standby power loss in high-impedance circuits |
Pinout & Package
Package: DO-201 axial-lead glass-passivated epoxy package (UL 94V-0 rated), 1.12g weight, tin-plated leads solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink during forward conduction | Connected to ground or low-side return path in unidirectional clamp configuration |
| Cathode | Protected line connection point | Marked with band; connects to rail requiring overvoltage protection (e.g., +28V aircraft bus) |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die construction | Enables stable VBR and low leakage over lifetime, even under humidity and thermal cycling |
| 1500W peak pulse rating | Supports single-event surge immunity up to 4kV (10/1000 µs) without degradation |
| RoHS-compliant, halogen-free "Green" finish | Meets EU Directive 2015/863/EU with Br+Cl <1500 ppm and Sb <1000 ppm |
| Axial lead form factor | Enables through-hole mounting in legacy power supplies and high-reliability industrial controls |
Applications
| Industrial Motor Drives | Telecom Power Feeds |
|---|---|
|
Use Scenario: Protection of 24–48V DC input stages against lightning-induced surges on factory floor motor controllers. IC Role / Device Role: Primary shunt clamp placed between input rail and chassis ground. Use Value: Limits transient voltage to ≤414V, preventing damage to upstream rectifiers and downstream DC-DC controllers. |
Use Scenario: Overvoltage safeguard on -48V telecom power distribution boards exposed to accidental AC mains contact. IC Role / Device Role: Unidirectional TVS connected cathode-to-rail, anode-to-ground to clamp positive excursions only. Use Value: Withstands 200A surge (8.3ms half-sine) without failure, preserving system uptime during field faults. |
| Automotive Body Control Modules | Renewable Energy Inverters |
|
Use Scenario: Input protection for 12V/24V BCMs subjected to load dump (ISO 7637-2 Pulse 5a). IC Role / Device Role: First-line defense parallel to bulk capacitor on battery feed. Use Value: Clamps 120V load dump transients to 414V within nanoseconds, protecting MCU I/O and CAN transceivers. |
Use Scenario: DC-link surge suppression in solar string inverters where PV array inputs face induced surges. IC Role / Device Role: Mounted across DC bus terminals to absorb energy from nearby lightning strikes. Use Value: 1500W rating enables single-device protection without parallel stacking, reducing BOM count and layout area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ300A | DO-214AA package, 600W rating, lower clamping (390V @ 3.3A), smaller footprint | Better suited for space-constrained PCBs but requires derating for >2kV IEC 61000-4-5 | Select when board area is critical and surge energy is ≤600W; verify thermal relief for repeated events. |
| 1N5388B | Same DO-201 package, 5W steady-state, no 1500W pulse rating; Zener-based, not TVS-optimized | Limited to low-energy regulation; lacks fast response and controlled clamping for surge events | Only acceptable for voltage reference or low-power biasing-not for surge protection. |
Compared with SMBJ300A and 1N5388B, the 1.5KE300A-T delivers higher surge energy absorption in the same axial form factor, making it uniquely suitable for legacy industrial and automotive designs where mechanical robustness and proven field reliability outweigh miniaturization needs.
Availability
1.5KE300A-T is available at Aetrix Electronics and suitable for industrial motor drives, telecom power feeds, automotive body control modules, and renewable energy inverters requiring stable component supply and long-term obsolescence management.
Supply support for 1.5KE300A-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 manufacturing certified to IATF 16949 and quality systems aligned to AEC-Q200.
The 1.5KE series targets high-energy transient suppression in harsh environments, emphasizing reliability, wide temperature operation, and compliance with industrial and automotive surge immunity standards.
FAQ
Is 1.5KE300A-T suitable for bidirectional surge protection?
No. The "A" suffix denotes unidirectional configuration. For bidirectional protection at the same voltage level, use 1.5KE300CA-T, which has symmetrical clamping for both polarities and no cathode band marking. The unidirectional version must be oriented with cathode toward the protected rail and anode to ground.
What is the maximum allowable ambient temperature for continuous operation?
At TA = +25°C, the device dissipates up to 5.0W continuously. Derating is required above +25°C: linear reduction to zero at +175°C junction temperature. For PCB-mounted operation, thermal resistance from junction to ambient is ~150°C/W; heatsinking or airflow is recommended above +75°C ambient.
Does 1.5KE300A-T meet AEC-Q200 qualification?
No. While manufactured in IATF 16949-certified facilities, the 1.5KE300A-T is not AEC-Q200 qualified. Diodes offers AEC-Q200-compliant alternatives (e.g., P6SMB300A) for automotive applications requiring formal PPAP documentation and change control.
Can this TVS replace a MOV in AC line protection?
No. MOVs handle higher energy at AC line frequencies and tolerate repetitive surges better. The 1.5KE300A-T is optimized for DC or low-frequency DC-biased transients (e.g., automotive load dump, telecom DC feeds). Using it on AC mains risks thermal runaway due to leakage current under continuous 50/60Hz voltage.
1.5KE300A-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):
- 256V
- Voltage - Breakdown (Min):
- 285V
- Voltage - Clamping (Max) @ Ipp:
- 414V
- Current - Peak Pulse (10/1000µs):
- 5A
- 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
1.5KE300A-T FAQ
1.How can I place an order for 1.5KE300A-T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE300A-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 1.5KE300A-T reliable?
The price and inventory of 1.5KE300A-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE300A-T is usually 5 days.
3.What payment methods are accepted for 1.5KE300A-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE300A-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE300A-T?
1.5KE300A-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE300A-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 1.5KE300A-T?
For technical support, including 1.5KE300A-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE300A-T requirements.
6.How does Aetrix verify that 1.5KE300A-T is sourced from the original manufacturer or authorized distributors?
All 1.5KE300A-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 1.5KE300A-T meets industry standards.
7.What is the process for return or replacement of 1.5KE300A-T?
All 1.5KE300A-T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE300A-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 1.5KE300A-T part is unused and in its original packaging.
Return procedure for 1.5KE300A-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE300A-T 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
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…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
