My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5KE9.1AHE3_B/C
- Part No.:
- 1.5KE9.1AHE3_B/C
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE9.1AHE3_B/C.pdf
- Description:
- 1.5KW,9.1V 5%,UNIDIR,AXIAL TVS
- Quantity:
- Payment:
- Shipping:
Inventory:5,215
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5KE9.1AHE3_B/C 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 12.0 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - used in automotive power supply input stages and industrial sensor interface protection.
For engineers reviewing the 1.5KE9.1AHE3_B/C datasheet, 1.5KE9.1AHE3_B/C pinout, 1.5KE9.1AHE3_B/C application, or 1.5KE9.1AHE3_B/C equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), JEDEC 1.5KE package dimensions, and direct alternative part comparisons for ESD/surge protection design-in.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: it remains high-impedance below VWM (7.78 V), enters avalanche breakdown between 8.65 V and 9.55 V, and clamps transients to ≤13.4 V at 12.0 A. Its glass-passivated junction enables sub-nanosecond response time (<1 ns) and low incremental surge resistance.
Rated for 175 °C maximum junction temperature and 200 A non-repetitive forward surge current (8.3 ms half-sine), the device supports robust protection in automotive and industrial environments where load dump, inductive switching, and lightning-induced surges occur - with RoHS-compliant matte tin-plated leads and UL 94 V-0 molded epoxy case.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 8.65 V / 9.55 V at 1.0 mA - defines precise avalanche onset window for reliable triggering without false trips |
| VWM | 7.78 V - maximum continuous DC or RMS voltage the device blocks without leakage exceeding 50 μA |
| VC @ IPPM | 13.4 V at 12.0 A - clamping voltage during 10/1000 µs transient, limiting downstream IC stress |
| PPPM | 1500 W - peak pulse power handling capability, enabling protection against severe ISO 7637-2 Pulse 5a/b events |
| RθJA | 75 °C/W - junction-to-ambient thermal resistance, informing heatsinking requirements for sustained surge duty |
| IFSM | 200 A - peak forward surge current rating (8.3 ms half-sine), supporting high-energy load-dump suppression |
| TJ max. | 175 °C - maximum operating junction temperature, qualifying for under-hood automotive use |
Pinout & Package
Package: JEDEC-standard Case Style 1.5KE - axial-leaded, molded epoxy body (UL 94 V-0), 0.375" (9.5 mm) lead length, 0.210" (5.3 mm) body diameter. Cathode indicated by color band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during reverse-biased clamping | Connected to protected line; conducts surge current to ground when VIN exceeds VBR |
| Cathode | Current exit point during clamping; marked with band | Connected to system ground or low-impedance return path; establishes polarity-sensitive protection direction |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable, repeatable avalanche characteristics and long-term reliability under repeated surge stress |
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics per stress test requirements |
| 1500 W peak pulse power (10/1000 µs) | Supports immunity to high-energy transients such as ISO 16750-2 load dump and ISO 7637-2 Pulse 5 |
| Sub-nanosecond response time | Clamps within <1 ns - faster than MOVs or polymer-based protectors, preserving signal integrity in fast digital interfaces |
| RoHS-compliant HE3 suffix | Meets JESD 201 Class 2 whisker resistance and solderability standards for high-reliability assembly |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump transients up to +120 V lasting 400 ms. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between power rail and chassis ground, triggered only during overvoltage events. Use Value: Clamps peak voltage to ≤13.4 V at 12 A, preventing damage to downstream LDOs, microcontrollers, and CAN transceivers. | Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to PLC I/O modules. IC Role / Device Role / Timing Role: Low-capacitance TVS on 4–20 mA or 0–10 V output lines, absorbing field-induced surges before reaching ADC inputs. Use Value: Limits transient energy with 13.4 V clamping and 75 °C/W thermal resistance, ensuring signal accuracy and long-term calibration stability. |
| Consumer Power Adapter Output Protection | Telecom DC Feeder Line Protection |
Use Scenario: Securing 5 V/9 V/12 V USB-C PD adapter outputs against ESD and accidental AC line contact. IC Role / Device Role / Timing Role: Final-stage TVS on secondary-side DC output, positioned after filtering but before connector. Use Value: Responds in <1 ns to clamp fast-rising ESD (IEC 61000-4-2) and slow surges (IEC 61000-4-5), maintaining output regulation. | Use Scenario: Protecting -48 V telecom DC feeder lines from lightning-induced longitudinal surges on outside plant wiring. IC Role / Device Role / Timing Role: Series-connected unidirectional TVS on each conductor relative to ground, rated for continuous -48 V bias. Use Value: Withstands 7.78 V working voltage and clamps to 13.4 V, enabling coordination with upstream gas discharge tubes in hybrid protection schemes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0A | Lower PPPM (600 W), smaller SMB package (IPPM = 43.5 A at VC = 14.4 V), RθJA = 110 °C/W | Preferred for space-constrained PCBs; less suitable for high-duty-cycle automotive load dump | Select when board area is critical and surge energy is limited to IEC 61000-4-5 Level 3 (1 kV/2 kA) |
| 1.5KE9.1A-E3/54 | Same electrical specs and 1.5KE package, but commercial-grade (non-AEC-Q101), different tape-and-reel packaging (54 vs. C code) | Acceptable for industrial/commercial designs without automotive qualification requirements | Choose for cost-sensitive non-automotive applications where AEC-Q101 is not mandated |
Compared with 1.5KE9.1AHE3_B/C, SMBJ9.0A trades peak power and thermal performance for compactness, while 1.5KE9.1A-E3/54 retains identical protection capability but omits automotive qualification - making the HE3_B/C variant essential for Tier-1 automotive BOMs requiring traceable AEC-Q101 compliance.
Availability
1.5KE9.1AHE3_B/C is available at Aetrix Electronics and suitable for automotive power systems, industrial sensor interfaces, consumer power adapters, and telecom DC feeder lines requiring stable component supply across extended production lifecycles.
Supply support for 1.5KE9.1AHE3_B/C 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 automotive-grade qualification.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments - delivering consistent clamping performance, AEC-Q101 validation, and robust thermal behavior for mission-critical power and signal line protection.
FAQ
What is the breakdown voltage tolerance of the 1.5KE9.1AHE3_B/C?
The 1.5KE9.1AHE3_B/C has a specified breakdown voltage range of 8.65 V to 9.55 V at 1.0 mA test current, representing ±5% tolerance around the nominal 9.1 V rating. This tight VBR window ensures predictable turn-on behavior in protection circuits and avoids premature conduction during normal operation. The 1.5KE9.1AHE3_B/C maintains this specification across its full operating temperature range of –55 °C to +175 °C.
Is the 1.5KE9.1AHE3_B/C qualified for automotive applications?
Yes, the 1.5KE9.1AHE3_B/C is AEC-Q101 qualified per Vishay documentation (Document Number 88301, Note 2), covering the full 1.5KE6.8AHE3_B to 1.5KE220AHE3_B family. This qualification includes stress testing for temperature cycling, humidity bias, mechanical shock, and high-temperature operating life - confirming suitability for under-hood and chassis-mounted automotive electronics. The 1.5KE9.1AHE3_B/C meets these requirements as shipped.
What is the clamping voltage of the 1.5KE9.1AHE3_B/C at its rated peak pulse current?
The 1.5KE9.1AHE3_B/C clamps to a maximum of 13.4 V at its rated peak pulse current of 12.0 A, measured using the standard 10/1000 µs double-exponential waveform. This VC value is guaranteed across all production lots and represents the worst-case voltage seen by downstream circuitry during a full-power transient event. The 1.5KE9.1AHE3_B/C achieves this clamping performance with low dynamic impedance, minimizing let-through energy.
Does the 1.5KE9.1AHE3_B/C have a defined thermal resistance specification?
Yes, the 1.5KE9.1AHE3_B/C has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W under standard JEDEC test conditions (mounted on FR-4 board with 1 in² copper pad). Its junction-to-lead resistance (RθJL) is 15.4 °C/W, supporting thermal design when leads are used as heat paths. These values are documented in the Vishay 88301 datasheet and apply directly to the 1.5KE9.1AHE3_B/C in its standard axial package configuration.
How does the 1.5KE9.1AHE3_B/C differ from the 1.5KE9.1A-E3/54 variant?
The 1.5KE9.1AHE3_B/C and 1.5KE9.1A-E3/54 share identical electrical specifications and 1.5KE package, but differ in qualification and packaging: the HE3_B/C suffix denotes AEC-Q101 qualification and 13" paper tape-and-reel delivery (C code, 1400 pcs/reel), while the -E3/54 variant is commercial-grade only and shipped in 13" tape with 54 carrier code. Both are RoHS-compliant, but only the 1.5KE9.1AHE3_B/C carries automotive qualification evidence.
1.5KE9.1AHE3_B/C 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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 7.7V
- Voltage - Breakdown (Min):
- 8.65V
- Voltage - Clamping (Max) @ Ipp:
- 13.4V
- Current - Peak Pulse (10/1000µs):
- 117A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE9.1AHE3_B/C FAQ
1.How can I place an order for 1.5KE9.1AHE3_B/C through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE9.1AHE3_B/C 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 1.5KE9.1AHE3_B/C reliable?
The price and inventory of 1.5KE9.1AHE3_B/C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE9.1AHE3_B/C is usually 5 days.
3.What payment methods are accepted for 1.5KE9.1AHE3_B/C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE9.1AHE3_B/C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE9.1AHE3_B/C?
1.5KE9.1AHE3_B/C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE9.1AHE3_B/C 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 1.5KE9.1AHE3_B/C?
For technical support, including 1.5KE9.1AHE3_B/C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE9.1AHE3_B/C requirements.
6.How does Aetrix verify that 1.5KE9.1AHE3_B/C is sourced from the original manufacturer or authorized distributors?
All 1.5KE9.1AHE3_B/C 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 1.5KE9.1AHE3_B/C meets industry standards.
7.What is the process for return or replacement of 1.5KE9.1AHE3_B/C?
All 1.5KE9.1AHE3_B/C units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE9.1AHE3_B/C, 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 1.5KE9.1AHE3_B/C part is unused and in its original packaging.
Return procedure for 1.5KE9.1AHE3_B/C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE9.1AHE3_B/C 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 …
