My Inquiry
My Account
Diodes Incorporated 1.5KE20A-T
- Part No.:
- 1.5KE20A-T
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE20A-T.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:4,632
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5KE20A-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 17.1V reverse standoff voltage, 19.0V minimum breakdown voltage at 1mA test current, 27.7V maximum clamping voltage at 54A peak pulse current, and operates across -55°C to +175°C.
For engineers reviewing the 1.5KE20A-T datasheet, 1.5KE20A-T pinout, 1.5KE20A-T application, or 1.5KE20A-T equivalent, this device serves as a robust, RoHS-compliant, lead-free surge protector for automotive power supplies, industrial control I/O, telecom line cards, and DC-DC converter input stages where fast response (<1ns), low leakage (<5μA @ 17.1V), and stable temperature coefficient (0.090%/°C) are critical.
Technical Context
This unidirectional TVS diode uses glass-passivated silicon junction technology to achieve precise breakdown characteristics and excellent clamping ratio (VC/VBR ≈ 1.46). Its DO-201 axial-leaded package supports high thermal dissipation during 1.0ms 8/20μs surge events while maintaining mechanical robustness under vibration and thermal cycling.
The device exhibits a tightly controlled 19.0–21.0V breakdown range at 1.0mA, with <5μA reverse leakage at VRWM and a temperature coefficient of +0.090%/°C - enabling predictable performance across wide ambient ranges without derating complexity in automotive or industrial designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500W at 1.0ms - sustains single-event lightning-induced surges per IEC 61000-4-5 Level 4 (4kV) |
| Reverse Standoff Voltage | 17.1V - maximum continuous DC operating voltage before significant leakage begins |
| Breakdown Voltage | 19.0V min / 21.0V max @ 1.0mA - defines precise conduction onset for reliable overvoltage triggering |
| Clamping Voltage | 27.7V @ 54A IPP - limits downstream circuit stress during worst-case surge transients |
| Leakage Current | <5.0μA @ 17.1V - ensures minimal standby power loss and signal integrity in high-impedance circuits |
| Operating Temperature | -55°C to +175°C - qualified for under-hood automotive, motor drive, and industrial environments |
| Package | DO-201 - axial-leaded, transfer-molded epoxy housing rated UL 94V-0, 1.12g mass |
Pinout & Package
DO-201 package with axial leads: cathode indicated by band on body; anode and cathode terminals support through-hole mounting. Leads are tin-finished, solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge return path | Connected to system ground or low-impedance reference; carries full surge current during clamping |
| Cathode | Protected line connection | Connected to line being protected (e.g., 12V rail); forward-biased during negative transients only in bidirectional variants (not applicable here) |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die construction | Ensures stable breakdown voltage and long-term reliability under repeated surge stress without parameter drift |
| 1500W peak pulse rating | Provides margin against IEC 61000-4-5 4kV open-circuit surge (8/20μs) on 12V/24V systems |
| RoHS-compliant, halogen-free | Meets automotive and industrial environmental requirements (Br+Cl <1500ppm, Sb <1000ppm) |
| Fast response time | <1.0ns turn-on - clamps before sensitive ICs experience overvoltage damage |
| Low temperature coefficient | +0.090%/°C - enables stable clamping across extended temperature ranges without recalibration |
Applications
| Automotive Power Rail Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: 12V battery-supplied ECU power input subjected to load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed upstream of DC-DC converter input. Use Value: Limits transient excursions to ≤27.7V, protecting 36V-rated input capacitors and controller ICs without crowbar action. |
Use Scenario: 24V digital input module exposed to field-wiring induced surges (IEC 61000-4-4 EFT). IC Role / Device Role / Timing Role: Line-side TVS on optocoupler input stage. Use Value: Clamps 4kV EFT bursts within 1ns, preserving signal integrity and preventing false triggering of isolation barriers. |
| Telecom Line Card Surge Suppression | DC-DC Converter Input Stage |
Use Scenario: -48V telecom power feed encountering lightning-induced longitudinal surges on copper pairs. IC Role / Device Role / Timing Role: Unidirectional shunt protector on power entry before hot-swap controller. Use Value: Absorbs 1500W surge energy without failure, maintaining uninterrupted operation during telecom central office surge events. |
Use Scenario: 48V-to-12V isolated DC-DC converter input subjected to back-EMF from relay coils and motor drivers. IC Role / Device Role / Timing Role: Secondary-level transient clamp after primary filter inductors. Use Value: Prevents voltage overshoot beyond 27.7V, avoiding MOSFET avalanche stress and gate oxide degradation in synchronous rectifiers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20A | Lower peak power (600W), smaller SMB package (surface-mount), 21.1V VBR min | Better suited for space-constrained PCBs; insufficient for 4kV IEC 61000-4-5 Level 4 | Select when board area is critical and surge threat level is ≤2kV (IEC Level 3) |
| 1N6267A | Same DO-201 package, 1500W rating, but higher clamping (29.2V @ 51.7A) and wider VBR tolerance (17.1–23.1V) | Less precise clamping margin; higher risk of overvoltage stress on downstream 30V-rated components | Acceptable where cost is prioritized over tight clamping ratio and temperature stability |
Compared with SMBJ20A and 1N6267A, the 1.5KE20A-T delivers superior clamping precision (27.7V), tighter VBR tolerance (±5%), and lower temperature drift (0.090%/°C), making it optimal for automotive and industrial designs requiring repeatable surge immunity at full IEC 61000-4-5 Level 4 compliance.
Availability
1.5KE20A-T is available at Aetrix Electronics and suitable for automotive power distribution, industrial PLC I/O modules, telecom line cards, and DC-DC converter input stages requiring stable component supply across extended product lifecycles.
Supply support for 1.5KE20A-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, manufacturing, and test facilities certified to IATF 16949 and ISO 9001 standards.
The 1.5KE series targets high-reliability transient suppression in automotive, industrial, and telecom infrastructure, emphasizing robust surge handling, wide temperature operation, and environmental compliance.
FAQ
Is 1.5KE20A-T suitable for bidirectional surge protection?
No. The 1.5KE20A-T is unidirectional and protects only positive-going transients on the cathode-connected line. For bidirectional protection (e.g., AC lines or differential signals), use the 1.5KE20CA variant, which has symmetrical breakdown in both polarities and no cathode marking.
What is the maximum allowable surge repetition rate for 1.5KE20A-T?
The 1500W rating applies to non-repetitive 1.0ms pulses. Per datasheet, the duty cycle must not exceed 4 pulses per minute at full amplitude. Higher repetition rates require derating based on thermal time constants of the DO-201 package and PCB copper area.
Does 1.5KE20A-T meet AEC-Q101 qualification?
No. While manufactured in IATF 16949-certified facilities, the 1.5KE20A-T is not AEC-Q101 qualified. Diodes offers AEC-Q101-qualified alternatives like the P4SMA20A in SMA package for automotive applications requiring formal qualification.
How does the 0.090%/°C temperature coefficient affect clamping voltage at 125°C?
At +125°C, the breakdown voltage increases by approximately 9.5% (0.090%/°C × 105°C delta), shifting VBR from 19.0V to ~20.8V. Clamping voltage rises proportionally, remaining within 29.5V - still below typical 30V system overvoltage thresholds.
1.5KE20A-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):
- 17.1V
- Voltage - Breakdown (Min):
- 19V
- Voltage - Clamping (Max) @ Ipp:
- 27.7V
- Current - Peak Pulse (10/1000µs):
- 54A
- 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
1.5KE20A-T FAQ
1.How can I place an order for 1.5KE20A-T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE20A-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 1.5KE20A-T reliable?
The price and inventory of 1.5KE20A-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE20A-T is usually 5 days.
3.What payment methods are accepted for 1.5KE20A-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE20A-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE20A-T?
1.5KE20A-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE20A-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 1.5KE20A-T?
For technical support, including 1.5KE20A-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE20A-T requirements.
6.How does Aetrix verify that 1.5KE20A-T is sourced from the original manufacturer or authorized distributors?
All 1.5KE20A-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 1.5KE20A-T meets industry standards.
7.What is the process for return or replacement of 1.5KE20A-T?
All 1.5KE20A-T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE20A-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 1.5KE20A-T part is unused and in its original packaging.
Return procedure for 1.5KE20A-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE20A-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…
