My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5KE12A-E3/51
- Part No.:
- 1.5KE12A-E3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE12A-E3/51.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:5,090
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5KE12A-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 12 V nominal breakdown voltage (VBR = 11.4–12.6 V at 1 mA), 16.7 V maximum clamping voltage at 89.8 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 power supplies.
For engineers reviewing the 1.5KE12A-E3/51 datasheet, 1.5KE12A-E3/51 pinout, 1.5KE12A-E3/51 application, or 1.5KE12A-E3/51 equivalent, this part delivers verified clamping performance, JEDEC-standard 1.5KE package compatibility, RoHS-compliant matte tin leads, and documented thermal derating behavior up to 175 °C junction temperature.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR, it avalanches into low-impedance conduction to divert surge current away from downstream circuitry. Its glass-passivated junction ensures stable breakdown characteristics and fast response (<1 ns), while the 1.5KE molded epoxy case provides UL 94 V-0 flammability compliance and mechanical robustness.
Designed for single-pulse transients (e.g., ESD, inductive switching, lightning-induced surges), the 1.5KE12A-E3/51 sustains 1500 W peak pulse power only under strict 10/1000 µs waveform conditions with ≤0.01% duty cycle. Its 6.5 W steady-state power dissipation and 75 °C/W junction-to-ambient thermal resistance require careful PCB copper area planning for thermal management in continuous operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 11.4 V / 12.6 V at 1 mA test current - defines precise avalanche onset threshold for reliable overvoltage triggering |
| VWM | 10.2 V maximum working voltage - sets safe DC operating limit below breakdown to prevent leakage-induced stress |
| VC @ IPPM | 16.7 V clamping voltage at 89.8 A peak pulse - determines worst-case voltage seen by protected IC during surge |
| PPPM | 1500 W peak pulse power (10/1000 µs) - quantifies single-event surge energy handling capability |
| IPPM | 89.8 A maximum peak pulse current - specifies absolute surge current limit before device failure |
| TJ max. | 175 °C maximum junction temperature - constrains ambient + self-heating budget in high-power or high-density layouts |
| RθJA | 75 °C/W junction-to-ambient thermal resistance - requires ≥1.5 cm² of 2-oz copper pour for safe 6.5 W continuous dissipation |
Pinout & Package
Package: JEDEC-standard 1.5KE axial-leaded DO-201AD molded epoxy case (1.0" × 0.210" body, 0.042" lead diameter), RoHS-compliant matte tin-plated leads solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., GND or return path) in unidirectional configuration |
| Cathode | Avalanche clamping terminal | Marked with color band; connected to protected line (e.g., 12 V rail or signal input) to clamp positive transients |
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) | Supports protection against IEC 61000-4-5 Level 4 surges (4 kV line-earth) without external series impedance |
| Clamping ratio VC/VBR ≈ 1.4 | Minimizes overvoltage overshoot during fast transients - critical for 3.3 V/5 V logic and automotive MCU inputs |
| Response time < 1 ns | Engages before most semiconductor junctions fail under ESD or lightning-induced dV/dt events |
| UL 94 V-0 compliant epoxy case | Meets flame-retardancy requirements for industrial and automotive end-equipment safety certifications |
Applications
| Industrial Power Supply Protection | Automotive Sensor Interface Protection |
|---|---|
Use Scenario: 12 V DC input rail in programmable logic controllers exposed to relay coil flyback and motor drive noise. IC Role / Device Role / Timing Role: Unidirectional shunt clamping element placed between rail and ground, triggered within 1 ns of overvoltage event. Use Value: Limits transient voltage to ≤16.7 V, preventing latch-up or gate oxide damage in downstream buck controllers and microcontrollers. |
Use Scenario: LIN bus or analog sensor signal line (e.g., pressure transducer) in engine control units subject to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary front-end transient suppressor mounted at connector entry point, absorbing >90% of surge energy before conditioning circuitry. Use Value: Maintains signal integrity by clamping induced spikes to <17 V while exhibiting <5 µA leakage at 10.2 V operating voltage. |
| Consumer Equipment AC/DC Adapter Output | Telecom Line Card Surge Protection |
Use Scenario: Secondary-side 12 V output of wall adapter powering USB hubs and peripheral controllers. IC Role / Device Role / Timing Role: Final-stage overvoltage guard on regulated output, coordinated with upstream OVP and current limiting. Use Value: Survives repeated 1500 W surges without parameter shift, enabling 10-year field reliability in CE-marked consumer products. |
Use Scenario: Protection of Ethernet PHY interface on DSLAM line cards exposed to induced lightning on copper pairs. IC Role / Device Role / Timing Role: First-line defense in hybrid protection circuit (with gas discharge tube and PTC), handling initial fast-rising edge. Use Value: Clamps 10/1000 µs surges to 16.7 V within 1 ns, reducing stress on secondary protection components and extending system MTBF. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12A | DO-214AA (SMB) surface-mount package; same VBR range but lower PPPM (600 W); 10× smaller footprint | Preferred for space-constrained PCBs where thermal mass is managed via copper pads; not suitable for through-hole legacy designs | Select SMBJ12A when board real estate is limited and peak surge energy is ≤600 W; verify thermal pad layout meets 600 W pulse requirements. |
| 1.5KE12CA | Bidirectional variant (no polarity marking); identical VBR, VC, and PPPM; same 1.5KE package | Required for AC-coupled or floating signal lines (e.g., RS-485, CAN bus) where voltage polarity reversal occurs | Choose 1.5KE12CA only when protecting bidirectional signals; unidirectional 1.5KE12A-E3/51 offers lower leakage and simpler layout for DC rails. |
Compared with SMBJ12A, the 1.5KE12A-E3/51 delivers 2.5× higher surge power handling in a through-hole package ideal for high-reliability industrial power stages; versus 1.5KE12CA, it provides tighter leakage control and simplified polarity-aware placement on unidirectional DC lines.
Availability
1.5KE12A-E3/51 is available at Aetrix Electronics and suitable for industrial power supply protection, automotive sensor interface hardening, and telecom line card surge mitigation requiring stable component supply across multi-year production cycles.
Supply support for 1.5KE12A-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 high-reliability diodes, rectifiers, and protection devices for demanding industrial and automotive environments.
The 1.5KE series was engineered specifically for high-energy transient suppression in DC power distribution networks, emphasizing rugged packaging, tight parametric tolerances, and validated performance under IEC/ISO surge standards.
FAQ
What is the exact breakdown voltage range for the 1.5KE12A-E3/51?
The 1.5KE12A-E3/51 has a guaranteed breakdown voltage range of 11.4 V to 12.6 V at 1 mA test current (VBR), measured per JEDEC standard. This ±5% tolerance ensures consistent clamping onset across production lots and supports reliable design margining against 12 V nominal systems.
Does the 1.5KE12A-E3/51 meet automotive qualification standards?
The 1.5KE12A-E3/51 is commercial-grade and not AEC-Q101 qualified. For automotive applications, Vishay offers the 1.5KE12AHE3_B variant (same electrical specs, AEC-Q101 qualified). The 1.5KE12A-E3/51 remains suitable for non-safety-critical industrial and consumer use where AEC-Q101 is not mandated.
How does the clamping voltage of the 1.5KE12A-E3/51 compare to its breakdown voltage?
The 1.5KE12A-E3/51 clamps at 16.7 V when subjected to its rated 89.8 A peak pulse current (10/1000 µs), yielding a clamping ratio (VC/VBR) of approximately 1.4. This ratio reflects low incremental surge resistance and ensures protected circuits experience minimal overvoltage beyond the breakdown threshold.
Can the 1.5KE12A-E3/51 be used in bidirectional signal protection?
No - the 1.5KE12A-E3/51 is unidirectional only, with cathode marked by a color band. For bidirectional protection (e.g., AC lines or differential buses), the 1.5KE12CA variant must be used. Using 1.5KE12A-E3/51 on bidirectional signals risks forward conduction during negative half-cycles and potential failure.
What is the maximum steady-state power dissipation for the 1.5KE12A-E3/51?
The 1.5KE12A-E3/51 has a maximum steady-state power dissipation (PD) of 6.5 W when mounted on an infinite heatsink at 75 °C lead temperature. In practical PCB layouts, derating applies: at 25 °C ambient with 1.5 cm² of 2-oz copper, usable continuous power is ~2.5 W due to RθJA = 75 °C/W.
1.5KE12A-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):
- 10.2V
- Voltage - Breakdown (Min):
- 11.4V
- Voltage - Clamping (Max) @ Ipp:
- 16.7V
- Current - Peak Pulse (10/1000µs):
- 89.8A
- 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
1.5KE12A-E3/51 FAQ
1.How can I place an order for 1.5KE12A-E3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE12A-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 1.5KE12A-E3/51 reliable?
The price and inventory of 1.5KE12A-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 1.5KE12A-E3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE12A-E3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE12A-E3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE12A-E3/51?
1.5KE12A-E3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE12A-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 1.5KE12A-E3/51?
For technical support, including 1.5KE12A-E3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE12A-E3/51 requirements.
6.How does Aetrix verify that 1.5KE12A-E3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE12A-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 1.5KE12A-E3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE12A-E3/51?
All 1.5KE12A-E3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE12A-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 1.5KE12A-E3/51 part is unused and in its original packaging.
Return procedure for 1.5KE12A-E3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE12A-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 …
