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Vishay General Semiconductor - Diodes Division 1.5KE30-E3/54
- Part No.:
- 1.5KE30-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE30-E3/54.pdf
- Description:
- TVS DIODE 24.3VWM 43.5VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:9,690
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Product details
Overview
1.5KE30-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 breakdown voltage (VBR = 28.5–31.5 V at 1.0 mA), 41.4 V maximum clamping voltage (VC) 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 against lightning-induced surges and inductive switching transients.
For engineers reviewing the 1.5KE30-E3/54 datasheet, 1.5KE30-E3/54 pinout, 1.5KE30-E3/54 application, or 1.5KE30-E3/54 equivalent, this device is selected for robust, low-clamping-voltage transient suppression in automotive body electronics, industrial PLC I/O modules, and telecom power supply front-ends where fast response (<1 ns), high surge current tolerance, and AEC-Q101-compliant variants are critical.
Technical Context
This unidirectional TVS operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 µA leakage at 25.6 V stand-off), but triggers into low-impedance conduction when transient voltage exceeds its 28.5–31.5 V breakdown range. Its glass-passivated junction ensures stable VBR tolerance and low incremental surge resistance.
It delivers 1500 W peak pulse power handling per JEDEC-standard 10/1000 µs waveform, with thermal resistance of 75 °C/W (junction-to-ambient) and 15.4 °C/W (junction-to-lead), enabling reliable operation up to 175 °C junction temperature. The E3 suffix confirms RoHS compliance and JESD 201 Class 1A whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 28.5 V / 31.5 V at 1.0 mA - defines precise clamping onset threshold for design margining |
| VWM | 25.6 V - maximum continuous working voltage; sets safe DC operating ceiling |
| VC @ IPPM | 41.4 V at 36.2 A - actual clamped voltage during worst-case surge; determines protected circuit stress |
| PPPM | 1500 W - peak transient energy absorption capability with 10/1000 µs waveform |
| IFSM | 200 A - single half-sine surge current rating (8.3 ms), critical for inductive load switch protection |
| TJ max | +175 °C - enables use in under-hood automotive and high-temperature industrial environments |
| Package | DO-201AD (Case Style 1.5KE) - axial-leaded, through-hole package with 0.375" lead length for mechanical robustness |
Pinout & Package
Package: DO-201AD molded epoxy case with matte tin-plated leads; meets UL 94 V-0 flammability rating and J-STD-002 solderability requirements. Cathode indicated by color band on body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to ground or lower-potential rail in unidirectional clamp configuration |
| Cathode | Current exit point during forward conduction; marked with band | Connected to protected line (e.g., +12 V rail); conducts surge current to ground when VIN > VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling |
| 1500 W peak pulse power (10/1000 µs) | Supports protection against severe lightning-induced surges per IEC 61000-4-5 Level 4 |
| Clamping ratio VC/VBR ≈ 1.45 | Minimizes overvoltage stress on downstream components compared to MOVs or varistors |
| Response time < 1 ns | Protects sensitive CMOS inputs before damage occurs during fast-rising transients |
| E3 suffix RoHS & whisker compliant | Meets JESD 201 Class 1A; suitable for high-reliability consumer and industrial assembly |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Module |
|---|---|
Use Scenario: Protects 12 V supply rail and LIN bus interface from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between VCC and GND, triggered within nanoseconds to clamp spikes above 30 V. Use Value: Prevents latch-up or gate oxide rupture in microcontrollers and LIN transceivers during ISO 7637-2 Pulse 5a events. |
Use Scenario: Shields 24 V digital input optocoupler circuitry from field-wiring induced surges in factory automation. IC Role / Device Role / Timing Role: Primary-level transient suppressor mounted at terminal block entry, absorbing 1 kV/500 A surge per IEC 61000-4-5. Use Value: Eliminates need for secondary protection stages, reducing BOM count and PCB footprint while maintaining SIL-2 functional safety margins. |
| Telecom Power Supply Front-End | Consumer Appliance Motor Drive Board |
Use Scenario: Clamps induced surges on -48 V DC telecom rectifier output caused by nearby lightning strikes. IC Role / Device Role / Timing Role: Unidirectional TVS connected cathode-to-rail, conducting only during positive overvoltage events on negative supply. Use Value: Maintains <50 V clamping level across full surge current range, preserving hold-up capacitor integrity and downstream DC/DC converter operation. |
Use Scenario: Safeguards MCU GPIO and H-bridge gate drivers from back-EMF spikes generated by brushed DC motor commutation. IC Role / Device Role / Timing Role: Localized TVS at motor driver IC supply pins, responding faster than ceramic capacitors alone. Use Value: Reduces EMI-induced reset events and extends gate driver lifetime by limiting VDS overshoot to <45 V during turn-off. |
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; 30 V VBR; 43.5 V VC @ 34.4 A; 600 W PPPM | Lower power rating; surface-mount only; better suited for space-constrained PCBs | Select SMBJ30A when board area is limited and surge energy is ≤600 W; not drop-in for through-hole layouts. |
| 1.5KE30AHE3_B | Same DO-201AD package and electrical specs; AEC-Q101 qualified; HE3 suffix denotes whisker Class 2 | Qualified for automotive under-hood use; required for OEM Tier 1 production | Choose 1.5KE30AHE3_B for automotive applications requiring AEC-Q101 certification and extended temperature validation. |
Compared with 1.5KE30-E3/54, SMBJ30A offers smaller footprint but sacrifices 40% peak power handling and lacks axial-leaded mechanical robustness, while 1.5KE30AHE3_B provides identical protection performance with certified automotive qualification - making it the direct upgrade path for mission-critical vehicle systems.
Availability
1.5KE30-E3/54 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O protection, and telecom power supply front-end designs requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.
Supply support for 1.5KE30-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 high-reliability diodes, MOSFETs, and passive components for industrial, automotive, and computing markets.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments, balancing clamping precision, surge endurance, and manufacturability in axial-leaded packages for legacy and new industrial platforms.
FAQ
What is the breakdown voltage tolerance of the 1.5KE30-E3/54?
The 1.5KE30-E3/54 has a specified breakdown voltage range of 28.5 V to 31.5 V at 1.0 mA test current, corresponding to ±10% tolerance around the nominal 30 V rating. This tight VBR window ensures predictable clamping behavior across production lots and temperature ranges, critical for protecting circuits with narrow voltage margins. The 1.5KE30-E3/54 maintains this specification per Vishay Document 88301 Rev. 09-Aug-2022.
Is the 1.5KE30-E3/54 suitable for bidirectional transient suppression?
No, the 1.5KE30-E3/54 is a unidirectional TVS diode - it conducts only when the cathode is more positive than the anode by ≥28.5 V. For bidirectional protection, Vishay offers the 1.5KE30CA variant. Using the 1.5KE30-E3/54 in AC or floating applications without polarity awareness risks failure during reverse surges. Always verify polarity alignment in schematic placement for the 1.5KE30-E3/54.
What is the maximum clamping voltage of the 1.5KE30-E3/54 under surge conditions?
The 1.5KE30-E3/54 exhibits a maximum clamping voltage (VC) of 41.4 V when subjected to its rated peak pulse current of 36.2 A using the standard 10/1000 µs waveform. This value is measured per JEDEC test conditions and represents the highest voltage seen by downstream components during worst-case transient events. Designers must ensure all protected devices tolerate this 41.4 V peak when specifying the 1.5KE30-E3/54.
Does the 1.5KE30-E3/54 meet automotive qualification standards?
The base 1.5KE30-E3/54 is commercial-grade and not AEC-Q101 qualified. However, Vishay offers the pin-compatible 1.5KE30AHE3_B variant - identical in electrical and mechanical specs - which carries full AEC-Q101 qualification for automotive under-hood use. For automotive production, specify 1.5KE30AHE3_B; the 1.5KE30-E3/54 remains appropriate for industrial and telecom applications where AEC-Q101 is not mandated.
How does the 1.5KE30-E3/54 compare to MOV-based protection in terms of response time?
The 1.5KE30-E3/54 responds in less than 1 nanosecond, significantly faster than metal-oxide varistors (MOVs), which typically exhibit 20–50 ns response. This sub-ns speed allows the 1.5KE30-E3/54 to clamp transients before voltage overshoot damages sensitive CMOS inputs or gate oxides - a key advantage in protecting high-speed interfaces and microcontrollers where MOVs may permit destructive overvoltage excursions. The 1.5KE30-E3/54 leverages silicon junction physics for deterministic timing.
1.5KE30-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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 24.3V
- Voltage - Breakdown (Min):
- 27V
- Voltage - Clamping (Max) @ Ipp:
- 43.5V
- Current - Peak Pulse (10/1000µs):
- 34.5A
- 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:
- 1.5KE
1.5KE30-E3/54 FAQ
1.How can I place an order for 1.5KE30-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE30-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 1.5KE30-E3/54 reliable?
The price and inventory of 1.5KE30-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 1.5KE30-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE30-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE30-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE30-E3/54?
1.5KE30-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE30-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 1.5KE30-E3/54?
For technical support, including 1.5KE30-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE30-E3/54 requirements.
6.How does Aetrix verify that 1.5KE30-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE30-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 1.5KE30-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE30-E3/54?
All 1.5KE30-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE30-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 1.5KE30-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE30-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE30-E3/54 Tags
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