My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5KE43HE3/54
- Part No.:
- 1.5KE43HE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE43HE3/54.pdf
- Description:
- TVS DIODE 34.8VWM 61.9VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:4,643
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5KE43HE3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary-level overvoltage protection in DC power rails and signal lines. It features a 43 V breakdown voltage (VBR = 40.9–45.2 V at 1.0 mA), 36.8 V maximum working voltage (VWM), 59.3 V clamping voltage (VC) at 25.3 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 and automotive ECUs.
For engineers reviewing the 1.5KE43HE3/54 datasheet, 1.5KE43HE3/54 pinout, 1.5KE43HE3/54 application, or 1.5KE43HE3/54 equivalent, this part delivers verified AEC-Q101 qualification, glass-passivated junction reliability, and RoHS-compliant matte tin-plated leads - critical for high-reliability board-level surge protection where clamping response time (<1 ns), low incremental surge resistance, and stable thermal derating up to 175 °C junction temperature are required.
Technical Context
This unidirectional TVS operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 µA leakage at 36.8 V), then rapidly avalanches below 59.3 V to divert transient energy away from downstream circuitry. Its 1.5KE package supports lead-free soldering per J-STD-002 and withstands 275 °C dip for 10 s.
The device uses a silicon planar junction structure with glass passivation, enabling repeatable 1500 W surge handling at 0.01% duty cycle and thermal resistance of 15.4 °C/W (junction-to-lead). It is rated for -55 °C to +175 °C operating junction temperature and meets UL 94 V-0 flammability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 40.9–45.2 V at 1.0 mA - defines precise avalanche initiation threshold for reliable overvoltage detection |
| Working Voltage VWM | 36.8 V max - ensures no conduction during normal operation, preserving system standby current |
| Clamping Voltage VC | 59.3 V at 25.3 A IPPM - limits protected node voltage during surge, preventing MOSFET gate oxide or IC latch-up failure |
| Peak Pulse Power PPPM | 1500 W (10/1000 µs) - sustains single-event lightning-induced transients without degradation |
| Junction Temperature Range | -55 °C to +175 °C - enables deployment in under-hood automotive and industrial motor drive environments |
| Leakage Current ID | 1.0 µA max at VWM - avoids parasitic loading on low-power sensor bias networks |
| Thermal Resistance RθJL | 15.4 °C/W - allows direct PCB copper pour heatsinking without external thermal vias for most 1–2 W average dissipation cases |
Pinout & Package
Package: Case Style 1.5KE - molded epoxy body with axial leads; RoHS-compliant matte tin plating; UL 94 V-0 rated; 0.375" (9.5 mm) lead length standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-voltage rail; forms shunt path during reverse-biased transient events |
| Cathode | High-side transient input terminal | Connected to protected line (e.g., 24 V supply rail); color band identifies cathode end per JEDEC standard |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable, repeatable avalanche characteristics across 1000+ surge cycles without parameter drift |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per stress test plan |
| 1500 W peak pulse power | Handles IEC 61000-4-5 Level 4 (4 kV) surges on 50 Ω source impedance without failure |
| Sub-nanosecond response time | Clamps transients within <1 ns - faster than MOVs or polymer-based protectors, preserving signal integrity in high-speed lines |
| JESD 201 Class 2 whisker resistance | HE3 suffix confirms mitigation against tin whisker growth under thermal/humidity stress, critical for long-life embedded systems |
Applications
| Automotive Power Rail Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: 12 V/24 V battery-fed control modules exposed to load dump (ISO 16750-2) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional shunt clamp placed between power rail and chassis ground to limit voltage excursions to ≤59.3 V during 100 ms transients. Use Value: Prevents permanent damage to microcontroller power domains and CAN transceivers by maintaining rail voltage below absolute maximum ratings. |
Use Scenario: Analog input channels (0–10 V, 4–20 mA) on programmable logic controllers interfacing with field sensors in factory automation. IC Role / Device Role / Timing Role: Primary protection stage before precision op-amp front-end, absorbing induced surges from nearby motor contactor switching. Use Value: Eliminates need for secondary protection stages while preserving signal accuracy - leakage <1 µA avoids offset errors in µA-level current loops. |
| DC Motor Drive Gate Protection | Telecom Power Supply Clamp |
Use Scenario: High-side N-channel MOSFET gate drivers in brushed DC motor H-bridges subjected to back-EMF spikes. IC Role / Device Role / Timing Role: Clamps gate-source voltage to safe level (<59.3 V) during inductive turn-off, preventing gate oxide rupture. Use Value: Enables use of cost-effective 60 V-rated MOSFETs instead of higher-voltage (and higher-RDS(on)) alternatives. |
Use Scenario: Secondary-side 48 V DC distribution in telecom rectifier cabinets exposed to lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Parallel-connected TVS array across output bus to suppress differential-mode transients before DC-DC converters. Use Value: Maintains system uptime by preventing brownouts and latch-ups in downstream point-of-load regulators during outdoor site surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43A | DO-214AA package; lower 600 W PPPM; 59.3 V VC at 10.1 A IPPM | Lower surge capacity suits space-constrained consumer electronics, not automotive load dump | Select when board area is limited and surge energy is ≤600 W; verify thermal margin with RθJA = 110 °C/W |
| 1.5KE43A-E3/54 | Same 1.5KE package and electrical specs, but commercial-grade (non-AEC-Q101) and JESD 201 Class 1A whisker rating | Approved for industrial/commercial use only; excluded from automotive production programs requiring AEC-Q101 | Choose for cost-sensitive non-automotive designs where qualification documentation is not mandated |
Compared with SMBJ43A and 1.5KE43A-E3/54, the 1.5KE43HE3/54 uniquely combines AEC-Q101 qualification, 1500 W surge capability, and Class 2 whisker resistance - making it the only option among the three qualified for under-hood automotive deployment with full traceability and extended temperature compliance.
Availability
1.5KE43HE3/54 is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC input conditioning, and telecom DC power distribution requiring stable component supply with full AEC-Q101 documentation and long-term lifecycle assurance.
Supply support for 1.5KE43HE3/54 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 automotive, industrial, and computing markets.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments - delivering consistent clamping performance across wide temperature ranges and supporting automotive qualification standards from inception.
FAQ
What is the exact breakdown voltage range for 1.5KE43HE3/54?
The 1.5KE43HE3/54 has a guaranteed breakdown voltage (VBR) range of 40.9 V to 45.2 V measured at 1.0 mA test current, per Vishay Document 88301. This tolerance ensures predictable avalanche onset across production lots and temperature extremes, critical for designing robust overvoltage thresholds in safety-critical systems.
Is 1.5KE43HE3/54 suitable for automotive applications?
Yes, the 1.5KE43HE3/54 is AEC-Q101 qualified (per note 2 on page 3 of Document 88301), with validation covering temperature cycling, highly accelerated life testing, and ESD robustness. Its -55 °C to +175 °C operating range and HE3 suffix (JESD 201 Class 2 whisker resistance) make it approved for under-hood automotive power rail and sensor protection.
What does the "HE3/54" suffix mean in 1.5KE43HE3/54?
The "HE3" denotes RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance; "/54" specifies packaging in 13" paper tape and reel with 1400 units per reel. This ordering code ensures traceable, automotive-grade material with standardized logistics for SMT assembly lines.
How does the clamping voltage of 1.5KE43HE3/54 compare to its breakdown voltage?
The 1.5KE43HE3/54 clamps at 59.3 V (VC) when subjected to its rated 25.3 A peak pulse current (IPPM), which is approximately 30% above its minimum breakdown voltage of 40.9 V. This controlled voltage overshoot ensures protected circuits remain within safe operating areas while absorbing full 1500 W surge energy.
Can 1.5KE43HE3/54 be used in bidirectional configurations?
No - the 1.5KE43HE3/54 is unidirectional only. Bidirectional variants use the "CA" suffix (e.g., 1.5KE43CA), and the datasheet explicitly states bidirectional types are available only from 1.5KE6.8CA to 1.5KE220CA. Using 1.5KE43HE3/54 in AC or floating applications would result in forward conduction during negative half-cycles.
1.5KE43HE3/54 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):
- 34.8V
- Voltage - Breakdown (Min):
- 38.7V
- Voltage - Clamping (Max) @ Ipp:
- 61.9V
- Current - Peak Pulse (10/1000µs):
- 24.2A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE43HE3/54 FAQ
1.How can I place an order for 1.5KE43HE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE43HE3/54 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 1.5KE43HE3/54 reliable?
The price and inventory of 1.5KE43HE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE43HE3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE43HE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE43HE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE43HE3/54?
1.5KE43HE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE43HE3/54 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 1.5KE43HE3/54?
For technical support, including 1.5KE43HE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE43HE3/54 requirements.
6.How does Aetrix verify that 1.5KE43HE3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE43HE3/54 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 1.5KE43HE3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE43HE3/54?
All 1.5KE43HE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE43HE3/54, 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 1.5KE43HE3/54 part is unused and in its original packaging.
Return procedure for 1.5KE43HE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE43HE3/54 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
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
