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Taiwan Semiconductor Corporation 1.5KE9.1AHR0G
- Part No.:
- 1.5KE9.1AHR0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE9.1AHR0G.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:4,183
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Product details
Overview
1.5KE9.1AHR0G from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with nominal breakdown voltage 9.1V, working stand-off voltage 7.78V, clamping voltage 13.4V at 50A peak pulse current, and junction temperature range −55°C to +175°C - deployed for automotive ECU power rail protection against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the 1.5KE9.1AHR0G datasheet, 1.5KE9.1AHR0G pinout, 1.5KE9.1AHR0G application, or 1.5KE9.1AHR0G equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, clamping performance under 10/1000μs surge, thermal derating behavior, and direct alternatives for automotive-grade overvoltage protection design.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: it remains high-impedance below VWM (7.78V), triggers avalanche conduction at VBR (8.65–9.55V @ 1.0mA), and limits transient voltage to ≤13.4V at IPP = 50A (10/1000μs waveform). Its fast response time (<1.0ps from 0V to VBR) ensures suppression before downstream IC damage occurs.
Designed for automotive environments, 1.5KE9.1AHR0G meets AEC-Q101 stress requirements and ISO 7637-2 immunity standards. It supports unidirectional surge handling only (no bidirectional operation), with forward voltage VF = 3.5V @ 50A and maximum leakage ID = 1μA @ VWM - enabling low-power standby compatibility in always-on vehicle modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 8.65V / 9.55V @ IT = 1.0mA - defines precise avalanche onset window for reliable trigger margin in 12V system rails. |
| VWM | 7.78V - maximum continuous reverse voltage before leakage exceeds 1μA; compatible with 5V–9V logic supply domains. |
| VC @ IPP | 13.4V @ IPP = 50A (10/1000μs) - clamping voltage seen by protected IC during worst-case load dump; stays within 15V tolerance of most automotive microcontrollers. |
| PPK | 1500W - peak pulse power rating at TA = 25°C; derates linearly above ambient per Fig.2 without heatsink. |
| TJ max | +175°C - maximum junction temperature; enables placement near hot engine-control components without thermal shutdown risk. |
| ID @ VWM | <1μA - ultra-low blocking leakage ensures minimal quiescent current draw in battery-sensitive applications like CAN node sleep mode. |
| Response time | <1.0ps - sub-picosecond transition from off-state to clamping state; faster than typical ESD diodes and sufficient to intercept fast-switching inductive spikes. |
Pinout & Package
Package: DO-201 axial-leaded through-hole package with cathode band marking; body length 5.2mm ±0.3mm, diameter 2.7mm ±0.2mm, lead diameter 0.6mm, tin-plated leads compliant with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-impedance return path; forms shunt path for transient current during clamping. |
| Cathode | High-side input terminal | Connected to protected line (e.g., 12V rail); polarity marking (band) must align with circuit's positive rail orientation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive underhood use including temperature cycling, mechanical shock, and humidity testing per AEC standard. |
| 1500W surge capability | Withstands single 10/1000μs transients up to 50A without degradation - sufficient for ISO 7637-2 Pulse 5a (load dump) events. |
| Clamping voltage ≤13.4V | Ensures protected ICs (e.g., MCUs, CAN transceivers) remain within absolute maximum ratings during surge events on 12V systems. |
| Low dynamic impedance | Minimizes voltage overshoot during fast-rising transients; critical for suppressing nanosecond-scale EFT bursts per IEC 61000-4-4. |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU - suitable for Tier-1 automotive supply chain traceability. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protects 12V power input of BCM microcontroller from load dump and alternator ripple during ignition cycles. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed directly at MCU power entry point, clamping surges before LDO regulator input. Use Value: Limits voltage excursion to ≤13.4V during 1500W transients, preventing latch-up or gate oxide damage in 3.3V/5V logic cores. |
Use Scenario: Shields 24V digital input channel of industrial PLC from inductive kickback when solenoid valves de-energize. IC Role / Device Role / Timing Role: Fast-response voltage clamp on field-side signal line, operating in parallel with optocoupler input stage. Use Value: Sub-1ps response captures rising edge of 100ns–1μs inductive spikes, reducing false triggering and extending optocoupler lifetime. |
| Automotive Infotainment Power Supply | LED Lighting Driver EMI Suppression |
Use Scenario: Guards DC-DC converter input in head unit power tree against ISO 7637-2 Pulse 1 (inductive switching) and Pulse 3b (capacitive coupling). IC Role / Device Role / Timing Role: Primary overvoltage guard on 12V main rail upstream of buck controller; coordinates with ceramic bulk capacitors for energy absorption. Use Value: 1μA leakage at 7.78V preserves low-quiescent-current design; 175°C TJ rating allows mounting near heat-generating audio amplifiers. |
Use Scenario: Suppresses voltage spikes generated by MOSFET switching in constant-current LED driver for automotive exterior lighting. IC Role / Device Role / Timing Role: Unidirectional clamp across LED string anode-to-ground, triggered only during positive overvoltage events. Use Value: Clamps spike to 13.4V while maintaining <1μA dark current - avoids unintended dimming or flicker in PWM-controlled LED arrays. |
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 PPK (600W), smaller SMB package (surface-mount), VBR = 10.0–11.1V, VC = 14.4V @ 41.7A. | Not AEC-Q101 qualified; limited to non-automotive industrial use; requires PCB layout change due to SMD footprint. | Select when board space is constrained and automotive qualification is not required; verify thermal relief for repeated surges. |
| 1.5SMC9.0A | Same PPK (1500W), SMC package (surface-mount), VBR = 9.0–10.0V, VC = 13.6V @ 50A, AEC-Q101 available in H-suffix variants. | Surface-mount alternative with identical clamping performance but different thermal mass and reflow profile. | Choose for automated assembly lines where DO-201 through-hole insertion is unavailable; confirm JEDEC moisture sensitivity level (MSL) compliance. |
Compared with 1.5KE9.1AHR0G, SMBJ9.0A trades automotive qualification and power rating for compactness, while 1.5SMC9.0A matches its 1500W rating and AEC-Q101 capability but shifts to surface-mount assembly - requiring layout revision but enabling higher production throughput.
Availability
1.5KE9.1AHR0G is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and LED lighting applications requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant surge protection.
Supply support for 1.5KE9.1AHR0G 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, and power devices for automotive and industrial markets.
The 1.5KE series was designed specifically for high-energy transient suppression in harsh automotive environments, emphasizing AEC-Q101 reliability, ISO 7637-2 compliance, and robust clamping performance across wide temperature ranges.
FAQ
What does the "HR0G" suffix mean in 1.5KE9.1AHR0G?
The "HR0G" suffix in 1.5KE9.1AHR0G indicates RoHS-compliant green molding compound (G), AEC-Q101 qualification (H), and tape-and-reel packaging (R0). The "A" denotes tighter VBR tolerance (±5% vs. ±10% for non-A variants), and "HR0G" confirms full automotive-grade compliance per TSC's ordering code specification.
Is 1.5KE9.1AHR0G bidirectional or unidirectional?
1.5KE9.1AHR0G is a unidirectional TVS diode - it conducts only in reverse bias during overvoltage events and blocks forward current up to 200A surge (IFSM). Bidirectional operation requires CA-suffixed parts (e.g., 1.5KE9.1CA); using 1.5KE9.1AHR0G in AC-coupled circuits will not provide symmetrical clamping.
What is the maximum clamping voltage of 1.5KE9.1AHR0G at rated surge current?
The maximum clamping voltage VC of 1.5KE9.1AHR0G is 13.4V at IPP = 50A with a 10/1000μs waveform. This value is guaranteed across temperature and lifetime per TSC's electrical specifications table and represents the upper limit of voltage imposed on protected circuitry during worst-case transient events.
Can 1.5KE9.1AHR0G be used in 24V automotive systems?
No - 1.5KE9.1AHR0G is intended for 12V nominal systems. Its 7.78V working stand-off voltage (VWM) is too low for reliable blocking in 24V rails, risking excessive leakage and premature conduction. For 24V applications, select higher-voltage variants such as 1.5KE27AHR0G (VWM = 23.1V) or 1.5KE33AHR0G (VWM = 28.2V).
How does thermal derating affect 1.5KE9.1AHR0G's 1500W rating?
1.5KE9.1AHR0G's 1500W peak pulse power rating applies only at TA = 25°C. Above that, power capability decreases linearly per Fig.2 in the datasheet: at 75°C ambient, it drops to ~1000W; at 125°C, to ~500W. Derating must be applied for sustained surge duty cycles or high-temperature mounting locations.
1.5KE9.1AHR0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- 1.5KE
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 7.78V
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201
1.5KE9.1AHR0G FAQ
1.How can I place an order for 1.5KE9.1AHR0G through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE9.1AHR0G 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 1.5KE9.1AHR0G reliable?
The price and inventory of 1.5KE9.1AHR0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE9.1AHR0G is usually 5 days.
3.What payment methods are accepted for 1.5KE9.1AHR0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE9.1AHR0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE9.1AHR0G?
1.5KE9.1AHR0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE9.1AHR0G 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 1.5KE9.1AHR0G?
For technical support, including 1.5KE9.1AHR0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE9.1AHR0G requirements.
6.How does Aetrix verify that 1.5KE9.1AHR0G is sourced from the original manufacturer or authorized distributors?
All 1.5KE9.1AHR0G 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 1.5KE9.1AHR0G meets industry standards.
7.What is the process for return or replacement of 1.5KE9.1AHR0G?
All 1.5KE9.1AHR0G units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE9.1AHR0G, 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 1.5KE9.1AHR0G part is unused and in its original packaging.
Return procedure for 1.5KE9.1AHR0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE9.1AHR0G Tags
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