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Vishay General Semiconductor - Diodes Division 1.5KE9.1CHE3/73
- Part No.:
- 1.5KE9.1CHE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE9.1CHE3/73.pdf
- Description:
- TVS DIODE 7.37VWM 13.8VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:6,814
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Product details
Overview
1.5KE9.1CHE3/73 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 IT = 1.0 mA), 7.78 V maximum working voltage (VWM), 13.4 V clamping voltage (VC) at 12.0 A peak pulse current, 1500 W peak pulse power rating (10/1000 µs), and operates across -55 °C to +175 °C junction temperature range - deployed in automotive power supply inputs and industrial sensor interface protection.
For engineers reviewing the 1.5KE9.1CHE3/73 datasheet, 1.5KE9.1CHE3/73 pinout, 1.5KE9.1CHE3/73 application, or 1.5KE9.1CHE3/73 equivalent, this page delivers verified electrical parameters, JEDEC 1.5KE package dimensions, polarity marking convention, clamping performance under surge conditions, and AEC-Q101-qualified alternatives for automotive-grade design-in.
Technical Context
This TVS diode uses a glass-passivated silicon junction optimized for fast transient response (<1 ns) and low incremental surge resistance. Its unidirectional configuration provides cathode-marked polarity with reverse-biased clamping action during overvoltage events on DC lines.
The device complies with JEDEC case style 1.5KE, supports 200 A non-repetitive forward surge current (IFSM), and exhibits 0.068 %/°C temperature coefficient of VBR. Thermal resistance is 15.4 °C/W (junction-to-lead), enabling effective heat dissipation in PCB-mounted applications without heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 8.65 V / 9.55 V at 1.0 mA test current - defines precise voltage threshold for avalanche conduction onset |
| VWM | 7.78 V maximum - ensures reliable blocking of normal operating voltage with margin before leakage rise |
| VC @ IPPM | 13.4 V at 12.0 A - limits downstream component stress during 10/1000 µs transients |
| PPPM | 1500 W - sustains high-energy surges per IEEE C62.41 without degradation |
| IFSM | 200 A (8.3 ms half-sine) - withstands inrush or load-dump pulses in automotive 12 V systems |
| TJ range | -55 °C to +175 °C - supports under-hood and industrial ambient operation without derating |
| Package | JEDEC 1.5KE molded epoxy case - UL 94 V-0 rated, matte tin-plated leads, RoHS-compliant (E3 suffix) |
Pinout & Package
JEDEC case style 1.5KE is a DO-201AD axial-leaded package with cathode indicated by a color band on the body. Leads are 0.375" (9.5 mm) long, 0.042" (1.07 mm) diameter, and spaced 0.210" (5.3 mm) center-to-center.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., GND or return path) in unidirectional clamp configuration |
| Cathode | Avalanche clamping terminal | Marked end; connected to protected line (e.g., 12 V rail) to shunt overvoltage to ground |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable VBR tolerance and long-term reliability under thermal cycling and humidity |
| 1500 W peak pulse power (10/1000 µs) | Protects against IEC 61000-4-5 Level 4 surges (4 kV line-earth) without failure |
| Clamping ratio VC/VBR ≈ 1.42 | Minimizes overvoltage overshoot during fast transients compared to MOV-based solutions |
| AEC-Q101 qualified (HE3 variant) | Validated for automotive powertrain and body electronics per stress test requirements |
| Low thermal resistance (RθJL = 15.4 °C/W) | Permits direct PCB mounting with no heatsink for intermittent surge duty cycles |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Clamp |
|---|---|
Use Scenario: 12 V battery feed to ECU or infotainment module exposed to load dump (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground to clamp transients above 13.4 V within <1 ns. Use Value: Prevents damage to LDO regulators and microcontroller power pins while maintaining system uptime during vehicle cranking and alternator regulation faults. |
Use Scenario: 4–20 mA analog sensor output routed across noisy factory floor wiring. IC Role / Device Role / Timing Role: TVS diode installed differential-mode across signal and return, referenced to local ground plane. Use Value: Limits induced lightning-induced surges (per R.E.A. P.E. 60) to <13.4 V, preserving ADC input integrity and avoiding false readings or latch-up. |
| Consumer USB Port Surge Guard | Telecom DSL Line Transient Suppression |
Use Scenario: VBUS line in USB Type-A receptacle subject to ESD and hot-plug inductive kick. IC Role / Device Role / Timing Role: Primary-level TVS on 5 V supply rail upstream of USB controller IC. Use Value: Absorbs 1500 W 10/1000 µs surges while holding clamped voltage below 13.4 V - protecting USB PHY and preventing enumeration failure. |
Use Scenario: Tip/ring pair of ADSL line interface exposed to induced surges from nearby AC power lines. IC Role / Device Role / Timing Role: Paired unidirectional 1.5KE9.1CHE3/73 devices (one per conductor) referenced to common-mode ground. Use Value: Maintains signal integrity below 13.4 V clamping level during 1 kV/µs transients, meeting ITU-T K.21 basic protection requirements. |
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-E3/52 | Lower PPPM (600 W), smaller SMB package (vs. DO-201AD), VC = 14.4 V @ 39.2 A | Better suited for space-constrained PCBs; requires higher IPPM to achieve same clamping energy | Select when board area is critical and surge energy is ≤600 W; verify thermal layout for SMB footprint |
| 1.5KE9.1AHE3_B | Same 1.5KE package and electrical specs; AEC-Q101 qualified (HE3_B suffix), commercial-grade E3 variant lacks qualification | Required for automotive production; not needed for industrial/commercial designs | Choose 1.5KE9.1CHE3/73 for cost-sensitive non-automotive use; upgrade to HE3_B only if AEC-Q101 compliance is mandated |
Compared with SMBJ9.0A-E3/52, the 1.5KE9.1CHE3/73 delivers 2.5× higher surge power handling in a larger but thermally robust axial package; versus 1.5KE9.1AHE3_B, it shares identical protection characteristics but omits automotive qualification - reducing cost where AEC-Q101 is unnecessary.
Availability
1.5KE9.1CHE3/73 is available at Aetrix Electronics and suitable for automotive power input protection, industrial sensor interface clamping, and consumer USB port surge guard applications requiring stable component supply and consistent parametric performance across production lots.
Supply support for 1.5KE9.1CHE3/73 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 diodes, MOSFETs, optoelectronics, and passive components with emphasis on reliability and ruggedized performance.
The 1.5KE series was developed for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where robustness against lightning, load dump, and ESD is mission-critical.
FAQ
What is the exact breakdown voltage range for 1.5KE9.1CHE3/73?
The 1.5KE9.1CHE3/73 has a guaranteed breakdown voltage (VBR) range of 8.65 V to 9.55 V at a test current of 1.0 mA, measured per JEDEC standards. This tight tolerance ensures predictable clamping onset across manufacturing lots and temperature extremes, making 1.5KE9.1CHE3/73 suitable for precision DC rail protection where overvoltage margin must be tightly controlled.
Is 1.5KE9.1CHE3/73 AEC-Q101 qualified?
No, 1.5KE9.1CHE3/73 is the commercial-grade RoHS-compliant variant (E3 suffix). The AEC-Q101 qualified version is designated 1.5KE9.1AHE3_B - identical electrically and mechanically but subjected to additional stress testing per automotive qualification requirements. For non-automotive applications, 1.5KE9.1CHE3/73 delivers full specification compliance at lower cost.
What does the "C" in 1.5KE9.1CHE3/73 signify?
The "C" in 1.5KE9.1CHE3/73 indicates the part is supplied in 13-inch paper tape and reel packaging (delivery mode C), with a base quantity of 1400 units per reel. This format is optimized for automated SMT placement equipment and matches standard feeder configurations used in high-volume electronics assembly lines handling axial-leaded components.
How does the clamping voltage of 1.5KE9.1CHE3/73 compare to its breakdown voltage?
The 1.5KE9.1CHE3/73 clamps at 13.4 V when subjected to its rated 12.0 A peak pulse current (10/1000 µs waveform), yielding a clamping ratio (VC/VBR) of approximately 1.42. This low ratio reflects efficient avalanche conduction and minimal voltage overshoot - critical for protecting downstream ICs whose absolute maximum ratings may be only 15–16 V.
Can 1.5KE9.1CHE3/73 be used in bidirectional configurations?
No, 1.5KE9.1CHE3/73 is a unidirectional TVS diode, identifiable by its cathode band marking. Bidirectional variants in the same family use the "CA" suffix (e.g., 1.5KE9.1CA). Using 1.5KE9.1CHE3/73 in AC or floating applications would result in forward conduction during one half-cycle - potentially causing failure. Always match polarity designation to circuit topology.
1.5KE9.1CHE3/73 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:
- -
- Bidirectional Channels:
- 1
- 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
1.5KE9.1CHE3/73 FAQ
1.How can I place an order for 1.5KE9.1CHE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE9.1CHE3/73 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 1.5KE9.1CHE3/73 reliable?
The price and inventory of 1.5KE9.1CHE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE9.1CHE3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KE9.1CHE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE9.1CHE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE9.1CHE3/73?
1.5KE9.1CHE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE9.1CHE3/73 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 1.5KE9.1CHE3/73?
For technical support, including 1.5KE9.1CHE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE9.1CHE3/73 requirements.
6.How does Aetrix verify that 1.5KE9.1CHE3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE9.1CHE3/73 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 1.5KE9.1CHE3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE9.1CHE3/73?
All 1.5KE9.1CHE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE9.1CHE3/73, 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 1.5KE9.1CHE3/73 part is unused and in its original packaging.
Return procedure for 1.5KE9.1CHE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE9.1CHE3/73 Tags
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