My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5KE9.1HE3/73
- Part No.:
- 1.5KE9.1HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE9.1HE3/73.pdf
- Description:
- TVS DIODE 7.37VWM 13.8VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:8,658
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5KE9.1HE3/73 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection of DC power rails and signal lines. It features a 9.1 V breakdown voltage (VBR = 8.65–9.55 V at 1.0 mA), 7.78 V maximum working voltage (VWM), 13.4 V clamping voltage (VC) at 112 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive ECUs, industrial I/O modules, and telecom power supplies.
For engineers reviewing the 1.5KE9.1HE3/73 datasheet, 1.5KE9.1HE3/73 pinout, 1.5KE9.1HE3/73 application, or 1.5KE9.1HE3/73 equivalent, this part delivers verified AEC-Q101 qualification, RoHS-compliant matte tin leads, JESD 201 Class 2 whisker resistance, and UL 94 V-0 molded epoxy packaging - critical for high-reliability board-level surge protection design.
Technical Context
This unidirectional TVS diode operates as a fast-acting shunt clamp, leveraging glass-passivated silicon junction technology to achieve sub-nanosecond response time (<1 ns). Its clamping action initiates when transient voltage exceeds VWM (7.78 V), sustaining conduction until the surge decays below VBR (8.65–9.55 V) - enabling robust protection of downstream MOSFETs and ICs against ESD, lightning-induced surges, and inductive switching spikes.
The device is rated for 200 A non-repetitive forward surge current (IFSM) and exhibits low incremental surge resistance, ensuring stable clamping performance across temperature (–55 °C to +175 °C). Thermal resistance is specified at RθJL = 15.4 °C/W (junction-to-lead), supporting reliable power dissipation under repetitive transients when mounted on adequate copper land patterns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 8.65 V / 9.55 V at 1.0 mA - defines precise voltage threshold for avalanche conduction onset |
| VWM | 7.78 V - maximum continuous DC or RMS operating voltage before leakage rises above 50 μA |
| VC @ IPPM | 13.4 V at 112 A - clamped voltage seen by protected circuit during 10/1000 µs surge |
| PPPM | 1500 W - peak transient power handling capability per single 10/1000 µs pulse |
| IFSM | 200 A - withstands 8.3 ms half-sine surge without failure, critical for motor drive protection |
| TJ range | –55 °C to +175 °C - supports operation in under-hood automotive and industrial ambient environments |
| Package | Case Style 1.5KE - axial-leaded DO-201AD package with 0.375" lead length, UL 94 V-0 compliant |
Pinout & Package
1.5KE9.1HE3/73 uses the standard DO-201AD (Case Style 1.5KE) axial-leaded package: matte tin-plated leads, 0.375" (9.5 mm) lead length, molded epoxy body meeting UL 94 V-0 flammability rating. The cathode is marked by a color band on the body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path | Connected to ground or low-impedance reference; carries full surge current during clamping |
| Cathode | Protected line connection | Connected to line being protected (e.g., 12 V rail); voltage referenced to anode during clamping |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces |
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity stress |
| 1500 W peak pulse power | Handles IEC 61000-4-5 Level 4 (4 kV) surges without degradation when properly PCB-mounted |
| JESD 201 Class 2 whisker resistance | Prevents tin whisker growth under high-temp/humidity, eliminating latent field failures in sealed enclosures |
| UL 94 V-0 molding compound | Self-extinguishing epoxy prevents flame propagation during catastrophic overvoltage events |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply inputs in engine control units (ECUs) against load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Shunt-clamp TVS placed between battery rail and local regulator input to divert >100 A surges away from LDOs and microcontrollers. Use Value: Clamps to 13.4 V during 10/1000 µs transients, preventing overvoltage damage to 16 V-rated regulators and preserving system uptime. | Use Scenario: Safeguarding analog front-end inputs of pressure/temperature sensors in PLC I/O modules exposed to 24 V field wiring. IC Role / Device Role / Timing Role: Unidirectional TVS connected from sensor signal line to ground, absorbing induced surges from relay coil switching or nearby motor drives. Use Value: Limits transient voltage to ≤13.4 V within <1 ns, maintaining signal integrity and avoiding ADC saturation or op-amp latch-up. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Securing 48 V DC input of PoE-powered network switches against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary-stage TVS on main DC bus, coordinated with secondary MOVs and filtering to meet IEC 61000-4-5 requirements. Use Value: Delivers 1500 W pulse handling with 7.78 V standoff, enabling compact layout while meeting Telcordia GR-1089-CORE surge immunity. | Use Scenario: Shielding gate drivers and bootstrap circuits in washing machine inverter boards from back-EMF spikes generated by BLDC motor commutation. IC Role / Device Role / Timing Role: TVS placed across high-side driver supply rails to clamp inductive kickback before it reaches logic-level MOSFET gates. Use Value: Withstands 200 A 8.3 ms surges and clamps to 13.4 V, preventing gate oxide rupture and extending inverter module service life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0A | DO-214AA package (SMB), lower PPPM = 600 W, VC = 14.4 V @ 41.7 A | Surface-mount only; suited for space-constrained consumer PCBs but not high-energy industrial surges | Select SMBJ9.0A only when board area is limited and surge energy does not exceed 600 W duty cycle. |
| 1.5KE9.1A-E3/54 | Same 1.5KE package and electrical specs, but commercial-grade (non-AEC-Q101), HE3 suffix replaced by E3 | Lacks automotive qualification; acceptable for industrial/commercial use where AEC-Q101 is not mandated | Choose 1.5KE9.1A-E3/54 for cost-sensitive non-automotive designs requiring identical form/fit/function. |
Compared with SMBJ9.0A and 1.5KE9.1A-E3/54, the 1.5KE9.1HE3/73 uniquely combines AEC-Q101 qualification, 1500 W pulse rating, and axial-leaded DO-201AD mechanical robustness - making it the only option validated for under-hood automotive deployment and high-energy industrial surge environments.
Availability
1.5KE9.1HE3/73 is available at Aetrix Electronics and suitable for automotive ECU design, industrial I/O protection, and telecom power input hardening requiring stable component supply across extended production lifecycles.
Supply support for 1.5KE9.1HE3/73 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 optoelectronics for demanding industrial and automotive applications.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments, targeting applications where failure modes include load dump, lightning induction, and inductive switching - with emphasis on AEC-Q101 compliance and long-term parametric stability.
FAQ
What is the clamping voltage of the 1.5KE9.1HE3/73 under a 10/1000 µs surge?
The 1.5KE9.1HE3/73 clamps to a maximum of 13.4 V when subjected to its rated peak pulse current of 112 A using the standard 10/1000 µs waveform. This value is measured per JEDEC test conditions and ensures downstream components see no more than 13.4 V during transient events - critical for protecting 16 V-rated regulators and logic devices. The 1.5KE9.1HE3/73 maintains this clamping performance across its full operating temperature range.
Is the 1.5KE9.1HE3/73 qualified for automotive applications?
Yes, the 1.5KE9.1HE3/73 is AEC-Q101 qualified per Vishay documentation (Document Number 88301, Revision 09-Aug-2022), covering stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing. This qualification validates its use in automotive powertrain, chassis, and body electronics where reliability under thermal and vibration stress is mandatory. The 1.5KE9.1HE3/73 meets these requirements as a unidirectional TVS diode.
What is the difference between the HE3 and E3 suffixes in the 1.5KE9.1HE3/73 part number?
The HE3 suffix indicates RoHS-compliant construction with JESD 201 Class 2 whisker resistance and AEC-Q101 qualification, whereas E3 denotes RoHS compliance and JESD 201 Class 1A whisker resistance without automotive qualification. For the 1.5KE9.1HE3/73, HE3 confirms full automotive-grade reliability - essential for under-hood deployments. The 1.5KE9.1HE3/73 is distinct from commercial variants like 1.5KE9.1A-E3/54 due to this qualification layer.
Can the 1.5KE9.1HE3/73 be used in bidirectional configurations?
No, the 1.5KE9.1HE3/73 is a unidirectional TVS diode and must be connected with cathode toward the protected line and anode to ground. Bidirectional operation requires a CA-suffixed variant such as 1.5KE9.1CA, which is not offered in HE3/73 configuration per Vishay's ordering matrix. Using the 1.5KE9.1HE3/73 in reverse polarity will result in forward conduction and potential failure - always observe the cathode band marking on the 1.5KE9.1HE3/73 body.
What is the maximum operating temperature for the 1.5KE9.1HE3/73?
The 1.5KE9.1HE3/73 has a maximum junction temperature (TJ) of +175 °C and an operating storage temperature range of –55 °C to +175 °C. Its thermal resistance from junction to lead (RθJL) is 15.4 °C/W, meaning proper PCB copper land design is required to maintain TJ within limits during repetitive surges. This rating enables deployment in under-hood automotive and industrial environments where ambient temperatures exceed 125 °C - a key specification of the 1.5KE9.1HE3/73.
1.5KE9.1HE3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 7.37V
- Voltage - Breakdown (Min):
- 8.19V
- Voltage - Clamping (Max) @ Ipp:
- 13.8V
- Current - Peak Pulse (10/1000µs):
- 109A
- 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
1.5KE9.1HE3/73 FAQ
1.How can I place an order for 1.5KE9.1HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE9.1HE3/73 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 1.5KE9.1HE3/73 reliable?
The price and inventory of 1.5KE9.1HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE9.1HE3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KE9.1HE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE9.1HE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE9.1HE3/73?
1.5KE9.1HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE9.1HE3/73 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 1.5KE9.1HE3/73?
For technical support, including 1.5KE9.1HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE9.1HE3/73 requirements.
6.How does Aetrix verify that 1.5KE9.1HE3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE9.1HE3/73 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 1.5KE9.1HE3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE9.1HE3/73?
All 1.5KE9.1HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE9.1HE3/73, 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 1.5KE9.1HE3/73 part is unused and in its original packaging.
Return procedure for 1.5KE9.1HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE9.1HE3/73 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 …
