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Vishay General Semiconductor - Diodes Division 1.5KE30A-E3/54
- Part No.:
- 1.5KE30A-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE30A-E3/54.pdf
- Description:
- TVS DIODE 25.6VWM 41.4VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:14,763
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Product details
Overview
1.5KE30A-E3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 30 V nominal breakdown voltage (VBR = 28.5–31.5 V at 1.0 mA), 25.6 V maximum standoff voltage (VWM), 41.4 V clamping voltage at 36.2 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - used to safeguard MOSFETs, ICs, and sensor interfaces in industrial and automotive electronics.
For engineers reviewing the 1.5KE30A-E3/54 datasheet, 1.5KE30A-E3/54 pinout, 1.5KE30A-E3/54 application, or 1.5KE30A-E3/54 equivalent, this device delivers verified transient suppression performance for 24 V system rails, meets JEDEC 1.5KE package mechanical standards, supports RoHS-compliant reflow and wave soldering, and provides traceable AEC-Q101-qualified variants under HE3 suffixes.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR, it avalanches rapidly (<1 ns response) to divert surge current away from downstream components. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while the molded epoxy case meets UL 94 V-0 flammability rating.
Thermal design is supported by RθJA = 75 °C/W and RθJL = 15.4 °C/W, enabling reliable operation up to TJ = +175 °C. The device sustains 200 A non-repetitive forward surge (8.3 ms half-sine) and exhibits VF = 3.5 V at 100 A - critical for minimizing conduction loss during fault conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 28.5 V / 31.5 V at 1.0 mA - defines precise avalanche initiation threshold for repeatable clamping behavior |
| VWM | 25.6 V - maximum continuous reverse operating voltage before leakage rises significantly |
| VC @ IPPM | 41.4 V at 36.2 A - clamping voltage under 1500 W 10/1000 µs surge, limiting stress on protected ICs |
| PPPM | 1500 W - peak pulse power handling capability, sufficient for IEC 61000-4-5 Level 4 surges |
| IFSM | 200 A - surge current rating for 8.3 ms half-sine waveform, supporting robust input-stage protection |
| TJ range | –55 °C to +175 °C - wide junction temperature range enabling use in under-hood automotive and industrial environments |
| Package | DO-201AD (Case Style 1.5KE) - industry-standard axial leaded package with 0.375" lead length, UL 94 V-0 compliant |
Pinout & Package
1.5KE30A-E3/54 uses the DO-201AD axial-leaded package (Case Style 1.5KE), with cathode identified by a color band on the body. Leads are matte tin-plated and solderable per J-STD-002 and JESD 22-B102. Package dimensions: 1.0" (25.4 mm) body length min., 0.375" (9.5 mm) lead length, 0.210"–0.285" (5.3–7.2 mm) body diameter.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected circuit; carries full surge current during reverse avalanche |
| Cathode | Avalanche clamping terminal | Marked with color band; referenced to system ground or return path; establishes VBR and VC thresholds |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance (±5%), low leakage (<1 µA), and long-term reliability under thermal cycling |
| 1500 W peak pulse power (10/1000 µs) | Supports high-energy transients including lightning-induced surges per IEC 61000-4-5 and ISO 7637-2 |
| Ultrafast response time (<1 ns) | Clamps before sensitive logic or analog circuits experience damaging overvoltage |
| RoHS-compliant E3 suffix | Meets JESD 201 Class 1A whisker resistance; suitable for commercial-grade automated assembly |
| UL 94 V-0 molding compound | Provides flame-retardant housing essential for safety-critical industrial and transportation applications |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of 24 V DC input stage against load dump and inductive switching spikes in PLC I/O modules and servo drives. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed across input terminals to clamp transients before they reach DC-DC converters and microcontrollers. Use Value: Limits voltage to ≤41.4 V during 36.2 A surges, preventing damage to 36 V-rated input capacitors and 5 V LDO regulators. |
Use Scenario: Safeguarding LIN bus transceivers and microcontroller GPIOs from battery line transients during jump-start or alternator load dump events. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12 V supply rail feeding BCM power management ICs and sensor interfaces. Use Value: Withstands 200 A 8.3 ms surge and maintains <1 µA leakage at 25.6 V, ensuring low quiescent current in always-on domains. |
| Telecom Power Supplies | Consumer Appliance Control Boards |
Use Scenario: Input-stage protection for AC/DC adapters and PoE-powered equipment exposed to AC mains surges and Ethernet cable ESD. IC Role / Device Role / Timing Role: First-line defense on secondary-side 24–48 V DC outputs, coordinated with upstream MOVs and fuses. Use Value: Clamps 1500 W surges within 1 ns, reducing stress on downstream TVS arrays and enabling smaller secondary-side filtering. |
Use Scenario: Overvoltage protection for microcontroller reset lines and relay driver circuits in washing machines and HVAC controllers. IC Role / Device Role / Timing Role: Localized clamping element on 5 V or 3.3 V rails adjacent to noise-generating loads like solenoids and fans. Use Value: Low incremental surge resistance minimizes VC overshoot, preserving reset timing integrity and preventing false MCU resets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30A | DO-214AA package (SMB), 600 W PPPM, same VBR range but lower surge capacity | Surface-mount alternative for space-constrained PCBs; unsuitable for >30 A surge requirements | Select SMBJ30A only if board layout mandates SMD and peak surge current remains ≤22 A |
| 1.5KE30CA | Bidirectional variant with identical VBR/VC specs but symmetrical clamping in both polarities | Required for AC-coupled lines or differential buses where polarity reversal occurs (e.g., RS-485, CAN) | Choose 1.5KE30CA only when protecting bidirectional signals; 1.5KE30A-E3/54 is optimal for unidirectional DC rails |
Compared with SMBJ30A, 1.5KE30A-E3/54 delivers 2.5× higher surge power handling and axial-leaded mechanical robustness; versus 1.5KE30CA, it offers lower capacitance and tighter leakage control for DC bias applications - making it the preferred choice for 24 V industrial power rail protection.
Availability
1.5KE30A-E3/54 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power supplies, and consumer appliance control boards requiring stable component supply and full traceability.
Supply support for 1.5KE30A-E3/54 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, rectifiers, and protection devices with emphasis on reliability, precision, and automotive qualification.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments, targeting industrial automation, transportation, and infrastructure systems where failure resilience is mandatory.
FAQ
What is the breakdown voltage tolerance for 1.5KE30A-E3/54?
The 1.5KE30A-E3/54 has a specified breakdown voltage range of 28.5 V to 31.5 V at 1.0 mA test current, representing a ±5 % tolerance around the nominal 30 V rating. This tight tolerance ensures consistent clamping behavior across production lots and enables predictable system-level overvoltage margining in designs using the 1.5KE30A-E3/54.
Is 1.5KE30A-E3/54 suitable for automotive applications?
Yes - while the 1.5KE30A-E3/54 itself is commercial-grade (E3 suffix), the identical 1.5KE30AHE3_B variant is AEC-Q101 qualified and shares all electrical and thermal specifications. Engineers designing for automotive use should specify the HE3 version; the 1.5KE30A-E3/54 remains appropriate for non-automotive industrial or telecom applications where AEC-Q101 is not mandated.
How does the clamping voltage of 1.5KE30A-E3/54 compare to its standoff voltage?
The 1.5KE30A-E3/54 has a maximum standoff voltage (VWM) of 25.6 V and a clamping voltage (VC) of 41.4 V at 36.2 A. This 15.8 V differential ensures safe margin between normal operating voltage and clamping onset, allowing reliable operation on 24 V systems while limiting transient overshoot to levels compatible with 36 V-rated downstream components.
What is the thermal resistance of 1.5KE30A-E3/54 and how does it affect derating?
The 1.5KE30A-E3/54 has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead (RθJL) of 15.4 °C/W. At elevated ambient temperatures, power dissipation must be reduced per the derating curve in Figure 5 - for example, at 75 °C ambient, the device's continuous power rating drops to ~3.25 W, though its 1500 W surge capability remains intact for short-duration transients.
Can 1.5KE30A-E3/54 be used in parallel for higher surge current handling?
Yes - multiple 1.5KE30A-E3/54 devices can be paralleled to increase total surge current capacity, provided matched units are selected and layout symmetry minimizes current imbalance. However, due to VBR tolerance, derating of total IPPM by ≥20 % is recommended; for applications exceeding 40 A, consider higher-rated alternatives like 3KP30A instead of parallel 1.5KE30A-E3/54 units.
1.5KE30A-E3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- 36.2A
- 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
1.5KE30A-E3/54 FAQ
1.How can I place an order for 1.5KE30A-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE30A-E3/54 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-E3/54 reliable?
The price and inventory of 1.5KE30A-E3/54 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-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE30A-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE30A-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE30A-E3/54?
1.5KE30A-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE30A-E3/54 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-E3/54?
For technical support, including 1.5KE30A-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE30A-E3/54 requirements.
6.How does Aetrix verify that 1.5KE30A-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE30A-E3/54 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-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE30A-E3/54?
All 1.5KE30A-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE30A-E3/54, 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-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE30A-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE30A-E3/54 Tags
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