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Vishay General Semiconductor - Diodes Division 1.5KE7.5A-E3/51
- Part No.:
- 1.5KE7.5A-E3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE7.5A-E3/51.pdf
- Description:
- TVS DIODE 6.4VWM 11.3VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:2,093
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Product details
Overview
1.5KE7.5A-E3/51 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for primary overvoltage protection on DC power rails and signal lines. It features a 7.13 V to 7.88 V breakdown voltage (VBR) at 10 mA, 6.40 V maximum standoff voltage (VWM), 11.3 V clamping voltage (VC) at 133 A peak pulse current, 1500 W peak pulse power rating with 10/1000 µs waveform, and operates across -55 °C to +175 °C junction temperature range - used in automotive power supply input stages and industrial sensor interface protection.
For engineers reviewing the 1.5KE7.5A-E3/51 datasheet, 1.5KE7.5A-E3/51 pinout, 1.5KE7.5A-E3/51 application, or 1.5KE7.5A-E3/51 equivalent, this page delivers verified electrical parameters, polarity marking guidance, thermal resistance (RθJA = 75 °C/W), JEDEC 1.5KE package dimensions, and AEC-Q101 qualification status for automotive-grade selection.
Technical Context
The 1.5KE7.5A-E3/51 uses a glass-passivated silicon junction optimized for fast transient response (<1 ns) and low incremental surge resistance. Its unidirectional polarity is marked by a cathode band, enabling precise placement in series with protected IC inputs or parallel to DC rails. The device meets UL 94 V-0 flammability requirements and supports soldering per J-STD-002 and JESD 22-B102.
It delivers 1500 W peak pulse power handling under 10/1000 µs waveform with 0.01 % duty cycle, derated linearly above 25 °C ambient per Fig. 2. Thermal performance is characterized by RθJL = 15.4 °C/W (junction-to-lead), supporting high-reliability mounting on PCBs with adequate copper pour or lead-frame heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 7.13 V / 7.88 V at 10 mA - defines reliable conduction onset threshold for overvoltage detection |
| VWM | 6.40 V - maximum continuous reverse operating voltage before leakage exceeds 500 µA |
| VC @ IPPM | 11.3 V at 133 A - clamped voltage during worst-case 1500 W transient, limiting stress on downstream components |
| PPPM | 1500 W - peak transient energy absorption capability with 10/1000 µs waveform |
| IFSM | 200 A - non-repetitive forward surge current rating (8.3 ms half-sine), critical for inrush or load-dump survival |
| TJ Range | -55 °C to +175 °C - enables deployment in under-hood automotive and industrial environments without derating |
| RθJA | 75 °C/W - thermal resistance from junction to ambient, informs minimum PCB copper area needed for 6.5 W steady-state dissipation |
Pinout & Package
Package: JEDEC-standard Case Style 1.5KE - molded epoxy body with matte tin-plated leads, RoHS-compliant (E3 suffix), UL 94 V-0 rated, 0.375" (9.5 mm) lead length, 0.042" (1.07 mm) lead diameter.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or return path; forms current path during reverse-biased clamping |
| Cathode (marked with band) | High-side connection point | Connected to protected line; reverse voltage applied here triggers avalanche breakdown |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Enables stable, repeatable avalanche characteristics and long-term reliability under repeated transients |
| 1500 W peak pulse power (10/1000 µs) | Supports robust protection against ISO 7637-2 Load Dump Pulse 5a (up to 130 V, 100 ms) when combined with upstream impedance |
| Clamping time < 1 ns | Responds faster than MOVs or polymer-based protectors, preserving timing-critical signal integrity |
| AEC-Q101 qualified option available | Validated for automotive electronics per stress test requirements including HTGB, HTRB, and TCT |
| Matte tin plating, J-STD-002 compliant | Ensures reliable solder wetting and intermetallic formation in reflow and wave solder processes |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting microcontroller power pins against load dump transients in 12 V vehicle systems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VIN and GND to clamp surges above 7.88 V while remaining inert below 6.40 V. Use Value: Limits voltage seen by MCU to ≤11.3 V during 133 A transient, preventing latch-up or gate oxide damage. | Use Scenario: Shielding analog outputs of pressure sensors from ESD events in factory automation equipment. IC Role / Device Role / Timing Role: TVS mounted directly at connector entry point to shunt ±8 kV contact discharge per IEC 61000-4-2. Use Value: Sub-1 ns response ensures clamping occurs before sensitive op-amp input stages experience overstress. |
| Consumer USB Port Surge Suppression | Telecom DSL Line Transient Protection |
Use Scenario: Safeguarding USB 2.0 data lines and VBUS against AC adapter surge coupling in portable docking stations. IC Role / Device Role / Timing Role: Dual unidirectional 1.5KE7.5A-E3/51 devices (one per line) referenced to local ground. Use Value: 11.3 V clamping prevents damage to USB transceivers rated for 5.5 V absolute maximum. | Use Scenario: Front-end protection of ADSL line drivers exposed to lightning-induced surges on outdoor copper pairs. IC Role / Device Role / Timing Role: Mounted between tip/ring and ground in hybrid coupler circuitry to absorb common-mode transients. Use Value: 1500 W rating handles 10/1000 µs surges up to 133 A without degradation, meeting ITU-T K.20/21 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.0A | Lower PPPM (600 W), smaller SMB package (vs. axial 1.5KE), VBR = 7.78–8.6 V, VC = 12.0 V @ 50 A | Better suited for space-constrained PCBs; lower surge capacity limits use to Class I/II IEC 61000-4-5 | Select SMBJ7.0A when board area is constrained and peak surge current remains ≤50 A. |
| 1.5KE7.5AHE3_B | Identical electrical specs; AEC-Q101 qualified, HE3 suffix denotes whisker-tested matte tin plating (JESD 201 Class 2) | Required for automotive production programs requiring PPAP documentation and qualification traceability | Choose 1.5KE7.5AHE3_B for Tier 1 automotive designs where AEC-Q101 compliance is mandatory. |
Compared with SMBJ7.0A, the 1.5KE7.5A-E3/51 offers 2.5× higher surge power handling and proven axial-leaded mechanical robustness for high-energy transients; versus 1.5KE7.5AHE3_B, it lacks formal AEC-Q101 certification but shares identical clamping behavior and thermal performance for commercial/industrial use.
Availability
1.5KE7.5A-E3/51 is available at Aetrix Electronics and suitable for automotive power input protection, industrial sensor interface hardening, consumer USB port surge suppression, and telecom DSL line transient protection requiring stable component supply and full traceability.
Supply support for 1.5KE7.5A-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, rectifiers, MOSFETs, and protection devices with emphasis on reliability and application-specific validation.
The 1.5KE series was developed for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom infrastructure where sustained surge immunity and thermal stability are critical.
FAQ
What is the polarity configuration of the 1.5KE7.5A-E3/51?
The 1.5KE7.5A-E3/51 is a unidirectional TVS diode with cathode indicated by a color band on the body. It conducts only when reverse-biased beyond its breakdown voltage (7.13–7.88 V), making it suitable for DC rail protection where polarity is fixed. Bidirectional variants use "CA" suffixes (e.g., 1.5KE7.5CA); the 1.5KE7.5A-E3/51 must not be substituted for bidirectional use without circuit redesign.
Does the 1.5KE7.5A-E3/51 meet AEC-Q101 qualification?
No - the 1.5KE7.5A-E3/51 carries the E3 suffix denoting RoHS-compliant commercial grade construction. AEC-Q101 qualification is available only on variants with the HE3 suffix (e.g., 1.5KE7.5AHE3_B). The 1.5KE7.5A-E3/51 is rated for -55 °C to +175 °C operation and passes JESD 201 Class 1A whisker testing, but lacks the full stress-test validation required for automotive PPAP release.
What is the maximum clamping voltage of the 1.5KE7.5A-E3/51 under surge conditions?
The 1.5KE7.5A-E3/51 exhibits a maximum clamping voltage (VC) of 11.3 V when subjected to its rated peak pulse current (IPPM) of 133 A using a 10/1000 µs waveform. This value is measured per JEDEC standards and represents the upper limit of voltage imposed on protected circuitry during worst-case transient events - critical for ensuring downstream ICs remain within their absolute maximum ratings.
Can the 1.5KE7.5A-E3/51 be used in parallel to increase surge current handling?
Yes - multiple 1.5KE7.5A-E3/51 devices may be paralleled to distribute surge current, provided matched VBR tolerance (±5 %) and symmetrical PCB layout minimize current imbalance. However, total clamping voltage remains ~11.3 V; parallel use increases effective IPPM capacity but does not reduce VC. Derating guidelines in Fig. 2 must still be observed for ambient temperature effects on both devices.
What is the thermal resistance and how does it affect PCB layout for the 1.5KE7.5A-E3/51?
The 1.5KE7.5A-E3/51 has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W. To sustain its 6.5 W steady-state power dissipation (PD) without exceeding 175 °C junction temperature, PCB copper area and via count must be optimized - e.g., ≥1 in² (6.5 cm²) of 2 oz copper with 4+ thermal vias per lead reduces RθJA significantly. Layout directly impacts reliability during repetitive surge events.
1.5KE7.5A-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):
- 6.4V
- Voltage - Breakdown (Min):
- 7.13V
- Voltage - Clamping (Max) @ Ipp:
- 11.3V
- Current - Peak Pulse (10/1000µs):
- 133A
- 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
1.5KE7.5A-E3/51 FAQ
1.How can I place an order for 1.5KE7.5A-E3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE7.5A-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 1.5KE7.5A-E3/51 reliable?
The price and inventory of 1.5KE7.5A-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 1.5KE7.5A-E3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE7.5A-E3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE7.5A-E3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE7.5A-E3/51?
1.5KE7.5A-E3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE7.5A-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 1.5KE7.5A-E3/51?
For technical support, including 1.5KE7.5A-E3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE7.5A-E3/51 requirements.
6.How does Aetrix verify that 1.5KE7.5A-E3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE7.5A-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 1.5KE7.5A-E3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE7.5A-E3/51?
All 1.5KE7.5A-E3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE7.5A-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 1.5KE7.5A-E3/51 part is unused and in its original packaging.
Return procedure for 1.5KE7.5A-E3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE7.5A-E3/51 Tags
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