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Vishay General Semiconductor - Diodes Division 1.5KE91CHE3/54
- Part No.:
- 1.5KE91CHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE91CHE3/54.pdf
- Description:
- TVS DIODE 73.7VWM 131VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:8,441
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Product details
Overview
1.5KE91CHE3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 91 V breakdown voltage (VBR = 86.5–95.5 V at IT = 1.0 mA), 77.8 V maximum standoff voltage (VWM), 125 V clamping voltage (VC) at 12.0 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - used to safeguard MOSFETs, ICs, and sensor interfaces against lightning-induced surges and inductive switching transients.
For engineers reviewing the 1.5KE91CHE3/54 datasheet, 1.5KE91CHE3/54 pinout, 1.5KE91CHE3/54 application, or 1.5KE91CHE3/54 equivalent, this page delivers verified electrical parameters, JEDEC 1.5KE package details, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), and direct alternative part comparisons for automotive, industrial, and telecom surge protection design.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when transient 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 low incremental surge resistance.
It supports unidirectional polarity only (cathode marked by band), rated for -55 °C to +175 °C operating junction temperature, and exhibits 0.106 %/°C temperature coefficient of VBR. The device is RoHS-compliant (E3 suffix) and qualified to AEC-Q101 for automotive applications (HE3 variant).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 86.5 V / 95.5 V at 1.0 mA test current - defines precise clamping onset threshold for reliable overvoltage detection |
| VWM | 77.8 V maximum - ensures no conduction during normal DC operation up to rated system voltage |
| VC @ IPPM | 125 V at 12.0 A - limits protected circuit voltage during 10/1000 µs surge, enabling safe margin below IC absolute max ratings |
| PPPM | 1500 W - sustains high-energy transients (e.g., ISO 7637-2 Pulse 1/2a/5a) without failure |
| IFSM | 200 A (8.3 ms half-sine) - handles repetitive inrush or fault currents in power supply input stages |
| RθJA | 75 °C/W - determines thermal rise under sustained leakage or repeated surges; requires adequate PCB copper area for derating |
| Junction Temp Range | -55 °C to +175 °C - enables deployment in under-hood automotive, industrial motor drives, and outdoor telecom equipment |
Pinout & Package
Package: JEDEC DO-201AD (Case Style 1.5KE), molded epoxy body with matte tin-plated leads; 0.375" (9.5 mm) lead length; UL 94 V-0 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to lower-potential side (e.g., GND or return path) in unidirectional configuration |
| Cathode | Current exit point during reverse avalanche | Marked with color band; connected to protected line (e.g., 24 V rail or CAN_H) to clamp overvoltage to ground |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity stress |
| 1500 W peak pulse power (10/1000 µs) | Protects against high-energy transients per ISO 7637-2 and IEC 61000-4-5 Level 4 without degradation |
| AEC-Q101 qualified (HE3 variant) | Validated for automotive electronics including body control modules, ADAS sensors, and infotainment power supplies |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes let-through voltage to preserve headroom for downstream 100 V-rated MOSFETs or 80 V-input regulators |
| Fast response time (~1 ns) | Clamps before sensitive logic or analog circuits experience destructive overvoltage events |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 24 V battery-fed ECUs exposed to load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Primary shunt TVS placed at power entry to clamp transients before DC/DC converters and microcontrollers. Use Value: Withstands 1500 W surges and maintains VC ≤ 125 V, ensuring downstream 3.3 V/5 V LDOs and MCU IO remain within safe operating area. |
Use Scenario: 4–20 mA current loop or RS-485 bus in factory automation subject to ESD and cable-induced surges. IC Role / Device Role / Timing Role: Unidirectional TVS on signal line referenced to local ground, absorbing fast transients before receiver inputs. Use Value: Sub-nanosecond response prevents latch-up in isolated RS-485 transceivers; low VWM avoids false triggering during normal 24 V common-mode swings. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: 48 V PoE-powered network switches experiencing lightning-induced surges on Ethernet ports and auxiliary power rails. IC Role / Device Role / Timing Role: Front-end TVS on 48 V input stage, coordinated with upstream fuses and downstream TVS arrays. Use Value: 77.8 V VWM allows full utilization of 48 V nominal rail while clamping to 125 V - compatible with 150 V-rated input capacitors and MOSFETs. |
Use Scenario: BLDC motor controller in washing machines where back-EMF spikes threaten gate drivers and MCU power rails. IC Role / Device Role / Timing Role: TVS across motor phase outputs and DC bus to suppress inductive kickback during PWM switching. Use Value: 200 A IFSM rating handles repetitive commutation surges; 175 °C TJmax supports sealed, thermally constrained enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90A | DO-214AA package; lower PPPM = 600 W; VBR = 100–111 V; VC = 146 V @ 4.1 A | Lower surge capacity suits cost-sensitive consumer electronics; not AEC-Q101 qualified | Select SMBJ90A only for non-automotive, lower-energy environments where PCB space is constrained and 600 W suffices. |
| 1.5KE91AHE3_A | Same 1.5KE package and electrical specs; differs only in revision code ("A" vs "B"); identical AEC-Q101 qualification | No functional difference; same automotive use cases and reliability testing scope | 1.5KE91AHE3_A is a direct revision-equivalent - suitable if "B" revision is unavailable; verify latest production lot traceability. |
Compared with 1.5KE91CHE3/54, SMBJ90A offers smaller footprint but sacrifices 60% peak power handling and automotive qualification, while 1.5KE91AHE3_A provides identical performance with minor manufacturing revision - making it a seamless drop-in alternative for continuity planning.
Availability
1.5KE91CHE3/54 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom DC input surge suppression requiring stable component supply across multi-year production cycles.
Supply support for 1.5KE91CHE3/54 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 diodes, rectifiers, and protection devices with emphasis on reliability, power handling, and automotive-grade qualification.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and infrastructure applications where robustness against lightning, load dump, and ESD is mission-critical.
FAQ
What is the clamping voltage of the 1.5KE91CHE3/54 under a 10/1000 µs surge?
The 1.5KE91CHE3/54 clamps to a maximum of 125 V at 12.0 A peak pulse current (IPPM) when subjected to a 10/1000 µs waveform. This value is measured per standard test conditions (TA = 25 °C) and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring compatibility with 100 V-rated components downstream of the 1.5KE91CHE3/54.
Is the 1.5KE91CHE3/54 AEC-Q101 qualified?
Yes, the 1.5KE91CHE3/54 is AEC-Q101 qualified. The "HE3" suffix indicates RoHS compliance and full AEC-Q101 qualification per stress test requirements for automotive electronics, including temperature cycling, high-temperature operating life, and surge robustness - validated for use in engine control units, body electronics, and ADAS subsystems.
What does the "/54" in 1.5KE91CHE3/54 signify?
The "/54" denotes the preferred packaging code: 13-inch diameter paper tape and reel containing 1400 units. This format is optimized for automated SMT placement and supports high-volume production runs. The base part number remains 1.5KE91CHE3; the /54 suffix specifies logistics configuration, not electrical or reliability differences.
How does the 1.5KE91CHE3/54 differ from bidirectional variants like 1.5KE91C?
The 1.5KE91CHE3/54 is unidirectional, with cathode marked by a band and intended for DC line-to-ground protection. In contrast, 1.5KE91C is bidirectional (no polarity marking) and used for AC or differential signal protection (e.g., RS-485). Their VBR, VC, and PPPM values are identical, but circuit topology and layout routing differ fundamentally - the 1.5KE91CHE3/54 must be oriented correctly to avoid forward conduction during normal operation.
What is the thermal resistance of the 1.5KE91CHE3/54, and how does it affect layout?
The 1.5KE91CHE3/54 has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W. To maintain TJ ≤ 175 °C under continuous 6.5 W dissipation, PCB layout must include ≥ 1 in² of 2-oz copper pour connected to both leads. For surge-only operation, thermal mass dominates; however, repeated surges require attention to copper area and airflow to prevent cumulative heating that degrades VBR stability in the 1.5KE91CHE3/54.
1.5KE91CHE3/54 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 73.7V
- Voltage - Breakdown (Min):
- 81.9V
- Voltage - Clamping (Max) @ Ipp:
- 131V
- Current - Peak Pulse (10/1000µs):
- 11.5A
- 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
1.5KE91CHE3/54 FAQ
1.How can I place an order for 1.5KE91CHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE91CHE3/54 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 1.5KE91CHE3/54 reliable?
The price and inventory of 1.5KE91CHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE91CHE3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE91CHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE91CHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE91CHE3/54?
1.5KE91CHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE91CHE3/54 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 1.5KE91CHE3/54?
For technical support, including 1.5KE91CHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE91CHE3/54 requirements.
6.How does Aetrix verify that 1.5KE91CHE3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE91CHE3/54 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 1.5KE91CHE3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE91CHE3/54?
All 1.5KE91CHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE91CHE3/54, 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 1.5KE91CHE3/54 part is unused and in its original packaging.
Return procedure for 1.5KE91CHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE91CHE3/54 Tags
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