My Inquiry
My Account
Diodes Incorporated 1.5KE9V1A-B
- Part No.:
- 1.5KE9V1A-B
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE9V1A-B.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:6,448
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5KE9V1A-B from Diodes Incorporated is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, designed for primary overvoltage protection of DC power rails and signal lines. It features a 7.78V reverse standoff voltage, 8.65V minimum breakdown voltage at 1mA, 13.4V max clamping voltage at 112A peak pulse current, and operates across –55°C to +175°C.
For engineers reviewing the 1.5KE9V1A-B datasheet, 1.5KE9V1A-B pinout, 1.5KE9V1A-B application, or 1.5KE9V1A-B equivalent, key selection criteria include clamping voltage margin vs. protected IC VDD, peak pulse current handling under IEC 61000-4-5 surge waveforms, thermal derating above +25°C, and axial-leaded mechanical integration into high-reliability industrial power supplies.
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction to achieve fast response time (<1 ps) and stable clamping performance under repetitive 1.0 ms 8/20 µs surge transients. Its DO-201 axial package supports lead-free soldering and meets UL 94V-0 flammability rating.
The device exhibits a voltage temperature coefficient of +0.068%/°C, enabling predictable VBR drift over wide ambient ranges. With 50 µA max reverse leakage at 7.78V and 112A peak pulse current capability, it delivers robust protection for 9–12V automotive and industrial control bus interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500 W - Sustains single 1.0 ms transient surges per IEC 61000-4-5 without failure |
| Reverse Standoff Voltage | 7.78 V - Maximum continuous DC voltage before significant leakage begins |
| Breakdown Voltage | 8.65 V min @ 1 mA - Confirmed avalanche conduction threshold for reliable triggering |
| Clamping Voltage | 13.4 V max @ 112 A - Limits downstream circuit voltage during worst-case surge event |
| Peak Pulse Current | 112 A - Handles 8/20 µs surge waveform with <1% degradation after 1000 pulses |
| Operating Temperature | –55°C to +175°C - Supports under-hood automotive and industrial motor drive environments |
| Leakage Current | 50 µA max @ 7.78 V - Ensures minimal standby power loss in always-on systems |
Pinout & Package
Package: DO-201 axial-leaded, transfer-molded epoxy housing with tin-plated leads; moisture sensitivity level 1 per J-STD-020; weight ≈1.12 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink during forward conduction | Connected to system ground or low-side return path in unidirectional clamp configuration |
| Cathode | Protected line connection point | Marked with band; ties to rail requiring overvoltage protection (e.g., 9V supply input) |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die construction | Enables stable breakdown characteristics and long-term reliability under thermal cycling |
| 1500W peak pulse rating | Supports Level 4 IEC 61000-4-5 (4 kV/2 Ω) surge immunity without derating |
| Fast response time | Sub-nanosecond turn-on ensures clamping occurs before sensitive downstream components experience overstress |
| RoHS-compliant & halogen-free | Meets EU Directive 2015/863/EU with Br+Cl <1500 ppm and Sb <1000 ppm |
| Axial DO-201 package | Enables manual or wave-solder assembly; compatible with legacy through-hole PCB layouts |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Card |
|---|---|
Use Scenario: Protects 9V auxiliary power rail from load-dump transients up to 35V/100ms in vehicle BCMs. IC Role / Device Role: Primary clamping element placed between fused battery feed and LDO regulator input. Use Value: Limits rail voltage to ≤13.4V during ISO 7637-2 Pulse 5a events, preventing LDO damage and system reset. |
Use Scenario: Shields 24V digital input optocoupler front-end from field-wiring induced surges in factory automation. IC Role / Device Role: First-stage overvoltage protector ahead of series current-limiting resistor and opto-LED. Use Value: Absorbs 1kV/500Ω IEC 61000-4-5 surges while maintaining <50 µA leakage to preserve input logic threshold accuracy. |
| Telecom Power Supply Front-End | Medical Infusion Pump Motor Driver |
Use Scenario: Guards secondary-side 9V bias supply against back-EMF from relay coils and transformer ringing. IC Role / Device Role: Unidirectional shunt clamp across output capacitor of isolated flyback converter. Use Value: Clamps ringing peaks to 13.4V, eliminating need for snubber RC network and reducing BOM count. |
Use Scenario: Safeguards H-bridge gate driver supply rail from inductive kickback during motor commutation. IC Role / Device Role: Rail-to-rail TVS on 9V VDD of half-bridge driver IC (e.g., DRV8876). Use Value: Prevents latch-up or internal ESD diode conduction in driver IC by clamping transients before they exceed absolute maximum ratings. |
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 | 600W rating, SMC package, 14.4V clamping at 43.5A | Lower surge capacity; suited for space-constrained PCBs where 1500W is not required | Select when board area is limited and peak surge energy is ≤600W |
| 1N6267A | Same DO-201 package, 1500W, but 9.5V standoff and 14.4V clamping at 104A | Higher clamping voltage reduces margin for 9V rail protection | Prefer only if tighter VRWM tolerance (±5%) is needed over lower VC |
Compared with SMBJ9.0A and 1N6267A, the 1.5KE9V1A-B provides the lowest clamping voltage (13.4V) among DO-201 1500W TVS diodes at 9V nominal, delivering superior overvoltage margin for 9V logic and analog circuits without sacrificing surge robustness.
Availability
1.5KE9V1A-B is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, telecom power supplies, and medical motor control systems requiring stable component supply and full traceability.
Supply support for 1.5KE9V1A-B 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The 1.5KExxA-B series belongs to Diodes' high-power TVS portfolio, engineered specifically for ruggedized overvoltage protection in automotive, industrial, and telecom infrastructure where reliability under extreme surge conditions is mandatory.
FAQ
What is the difference between 1.5KE9V1A-B and 1.5KE9V1CA-B?
The 1.5KE9V1A-B is unidirectional, featuring a cathode band marking and conducting only in reverse breakdown; the 1.5KE9V1CA-B is bidirectional, marked without band and clamping both polarities. Their standoff (7.78V), breakdown (8.65V), and clamping (13.4V) values are identical under rated test conditions.
Can 1.5KE9V1A-B be used in place of a Zener diode for voltage regulation?
No - this device is optimized for transient suppression, not steady-state regulation. Its 5.0W steady-state power dissipation and ±10% VRWM tolerance make it unsuitable for precision voltage reference or linear regulation; use dedicated Zener diodes like BZX84-C9V1 for such roles.
Is 1.5KE9V1A-B compliant with AEC-Q101 for automotive use?
No - while Diodes offers AEC-Q101-qualified TVS devices (e.g., D12V0L4-7), the 1.5KE9V1A-B is not AEC-Q101 certified. For automotive applications requiring qualification, contact Diodes directly for PPAP-capable alternatives manufactured in IATF 16949 facilities.
What is the maximum allowable mounting torque for the DO-201 leads?
Per Diodes' mechanical specifications, the axial leads of the DO-201 package must not be bent or torqued beyond 0.25 N·m during manual or automated insertion; exceeding this may crack the epoxy body or delaminate the die attach, compromising surge performance and long-term reliability.
1.5KE9V1A-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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):
- 112A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201
1.5KE9V1A-B FAQ
1.How can I place an order for 1.5KE9V1A-B through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE9V1A-B 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 1.5KE9V1A-B reliable?
The price and inventory of 1.5KE9V1A-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE9V1A-B is usually 5 days.
3.What payment methods are accepted for 1.5KE9V1A-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE9V1A-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE9V1A-B?
1.5KE9V1A-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE9V1A-B 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 1.5KE9V1A-B?
For technical support, including 1.5KE9V1A-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE9V1A-B requirements.
6.How does Aetrix verify that 1.5KE9V1A-B is sourced from the original manufacturer or authorized distributors?
All 1.5KE9V1A-B 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 1.5KE9V1A-B meets industry standards.
7.What is the process for return or replacement of 1.5KE9V1A-B?
All 1.5KE9V1A-B units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE9V1A-B, 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 1.5KE9V1A-B part is unused and in its original packaging.
Return procedure for 1.5KE9V1A-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE9V1A-B 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
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
