My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5KE24A-E3/51
- Part No.:
- 1.5KE24A-E3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE24A-E3/51.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:5,043
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5KE24A-E3/51 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection of DC power rails and signal lines. It features a 22.8 V to 25.2 V breakdown voltage (VBR) at 1 mA, 20.5 V maximum standoff voltage (VWM), 33.2 V clamping voltage (VC) at 45.2 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - used in automotive power supply inputs and industrial sensor interfaces.
For engineers reviewing the 1.5KE24A-E3/51 datasheet, 1.5KE24A-E3/51 pinout, 1.5KE24A-E3/51 application, or 1.5KE24A-E3/51 equivalent, this page delivers verified electrical parameters, JEDEC 1.5KE package dimensions, clamping performance under surge conditions, thermal resistance (RθJA = 75 °C/W), and AEC-Q101-qualified alternatives where applicable.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: when transient voltage exceeds VBR, it avalanches into low-impedance conduction to divert surge current away from downstream ICs. Its glass-passivated junction ensures stable breakdown characteristics and fast response (<1 ns), while the molded epoxy case meets UL 94 V-0 flammability rating.
It supports single-pulse surge handling up to 200 A IFSM (8.3 ms half-sine), with thermal derating above 25 °C per Fig. 2 and power dissipation limited to 6.5 W on infinite heatsink at TL = 75 °C. Polarity is marked by cathode band; no marking on bidirectional variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 22.8 V / 25.2 V at IT = 1 mA - defines precise avalanche initiation threshold for reliable overvoltage triggering |
| VWM | 20.5 V maximum - ensures no conduction during normal 24 V rail operation with 10 % margin |
| VC @ IPPM | 33.2 V at 45.2 A - limits protected circuit voltage during 1500 W transient, critical for 3.3 V/5 V logic survival |
| PPPM | 1500 W with 10/1000 µs waveform - sustains high-energy surges common in automotive load dump and inductive switching |
| IPPM | 45.2 A peak pulse current - quantifies maximum surge current the device can safely clamp without degradation |
| RθJA | 75 °C/W - determines junction temperature rise under steady-state power dissipation; requires PCB copper area for thermal management |
| TJ range | –55 °C to +175 °C - enables deployment in under-hood automotive and industrial environments with wide ambient swings |
Pinout & Package
Package: JEDEC Case Style 1.5KE - axial-lead, molded epoxy body (0.375" lead length), UL 94 V-0 rated, matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry during forward conduction | Connected to system ground or low-side return path; not used in standard unidirectional TVS configuration |
| Cathode | Protected line connection point | Marked by color band; connects to line being protected (e.g., 24 V supply rail); conducts surge current to ground when V > VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable, repeatable VBR tolerance (±5 %) and long-term reliability under thermal cycling |
| 1500 W peak pulse power (10/1000 µs) | Handles high-energy transients from relay coil decay, motor commutation, and ISO 7637-2 Pulse 5a load dump |
| Clamping voltage ≤ 33.2 V at 45.2 A | Keeps downstream 24 V systems within safe operating area of 36 V-rated components |
| AEC-Q101 qualified option available | 1.5KE24AHE3_B variant meets automotive stress testing requirements for engine control and body electronics |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD, lightning-induced surges) |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: 24 V battery-fed ECUs exposed to ISO 7637-2 load dump pulses up to 60 V for 400 ms. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between power rail and chassis ground; clamps within <1 ns to limit voltage seen by LDOs and microcontrollers. Use Value: Prevents permanent damage to 36 V max-rated power management ICs during 120 J load dump events. |
Use Scenario: 4–20 mA current loop sensors in factory automation subject to cable-induced surges from nearby motor drives. IC Role / Device Role / Timing Role: TVS connected across sensor output terminals to suppress common-mode transients before analog front-end amplifiers. Use Value: Maintains signal integrity by limiting transient voltage to <33.2 V, avoiding ADC saturation or op-amp latch-up. |
| Telecom DC Power Feeds | Consumer Appliance Motor Control Boards |
Use Scenario: Central office power supplies delivering –48 V DC to remote terminal units via long outdoor cables vulnerable to lightning induction. IC Role / Device Role / Timing Role: Primary protection stage upstream of DC/DC converters; unidirectional configuration blocks reverse polarity while clamping positive surges. Use Value: Withstands 1500 W surges without failure, enabling compliance with ITU-T K.20 and Telcordia GR-1089-CORE. |
Use Scenario: Washing machine main board with brushed motor driver circuits generating repetitive inductive kickback on 24 V control lines. IC Role / Device Role / Timing Role: TVS mounted at motor driver IC outputs to absorb flyback energy from relay coils and H-bridge freewheeling paths. Use Value: Eliminates need for snubber RC networks; reduces BOM count while maintaining 100,000-cycle reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24A | DO-214AA package (SMB), 24 V VWM, 38.9 V VC @ 38.8 A, 600 W PPPM | Lower power rating; suited for space-constrained PCBs where 1500 W is not required | Select SMBJ24A when board area is limited and surge threat level is moderate (IEC 61000-4-5 Level 3) |
| 1.5KE24CA | Bidirectional version; same VBR, VC, and PPPM; symmetric clamping for AC or floating lines | Required for differential signal lines (e.g., RS-485, CAN bus) or AC-coupled interfaces | Choose 1.5KE24CA only when protecting bidirectional or AC-signaled paths; not drop-in for unidirectional 1.5KE24A-E3/51 |
Compared with SMBJ24A, the 1.5KE24A-E3/51 delivers 2.5× higher surge power handling in a through-hole package ideal for high-reliability industrial power rails; versus 1.5KE24CA, it provides optimized unidirectional clamping with cathode marking for simplified layout and lower leakage in DC-biased applications.
Availability
1.5KE24A-E3/51 is available at Aetrix Electronics and suitable for automotive power input protection, industrial sensor interface hardening, and telecom DC feed protection requiring stable component supply and full traceability.
Supply support for 1.5KE24A-E3/51 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive-grade qualification.
The 1.5KE series was engineered for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where sustained surge immunity and long-term parametric stability are mandatory.
FAQ
What is the breakdown voltage tolerance for 1.5KE24A-E3/51?
The 1.5KE24A-E3/51 has a guaranteed breakdown voltage range of 22.8 V to 25.2 V at test current IT = 1 mA, corresponding to ±5 % tolerance around the nominal 24 V rating. This tight VBR window ensures predictable clamping onset across production lots and temperature extremes from –55 °C to +175 °C.
Is 1.5KE24A-E3/51 RoHS compliant and lead-free?
Yes, the "E3" suffix in 1.5KE24A-E3/51 indicates full RoHS compliance per Directive 2011/65/EU, with matte tin-plated leads and lead-free solder compatibility validated per J-STD-002 and JESD 22-B102. Whisker resistance meets JESD 201 Class 1A, making it suitable for high-reliability commercial applications.
Can 1.5KE24A-E3/51 be used in automotive applications?
The base 1.5KE24A-E3/51 is commercial grade; however, the AEC-Q101-qualified variant 1.5KE24AHE3_B is available for automotive use. That part undergoes stress testing including HTOL, temperature cycling, and ESD per AEC-Q101 Rev D, and is approved for engine control, body electronics, and infotainment power rails.
What is the maximum clamping voltage of 1.5KE24A-E3/51 during a surge event?
The maximum clamping voltage (VC) of 1.5KE24A-E3/51 is 33.2 V at peak pulse current IPPM = 45.2 A, measured with a 10/1000 µs waveform. This value represents the upper limit of voltage imposed on the protected circuit during worst-case surge conditions, ensuring compatibility with 36 V-rated downstream components.
How does thermal resistance affect the long-term reliability of 1.5KE24A-E3/51?
With RθJA = 75 °C/W, the 1.5KE24A-E3/51 junction temperature rises significantly under continuous power dissipation. For example, at 1 W steady-state dissipation, ΔT = 75 °C - exceeding safe limits. Therefore, the device must be applied only for transient suppression (not steady-state), and PCB copper area should be maximized to reduce effective RθJA in high-surge-frequency applications.
1.5KE24A-E3/51 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Bulk
- 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):
- 45.2A
- 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:
- 1.5KE
1.5KE24A-E3/51 FAQ
1.How can I place an order for 1.5KE24A-E3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE24A-E3/51 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-E3/51 reliable?
The price and inventory of 1.5KE24A-E3/51 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-E3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE24A-E3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE24A-E3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE24A-E3/51?
1.5KE24A-E3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE24A-E3/51 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-E3/51?
For technical support, including 1.5KE24A-E3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE24A-E3/51 requirements.
6.How does Aetrix verify that 1.5KE24A-E3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE24A-E3/51 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-E3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE24A-E3/51?
All 1.5KE24A-E3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE24A-E3/51, 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-E3/51 part is unused and in its original packaging.
Return procedure for 1.5KE24A-E3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE24A-E3/51 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
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
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 …
