My Inquiry
My Account
onsemi 1.5KE250A
- Part No.:
- 1.5KE250A
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
1.5KE250A.pdf
- Description:
- TVS DIODE 214VWM 344VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:2,329
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5KE250A from ON Semiconductor is a unidirectional 1500 W transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 214 V working peak reverse voltage (VRWM), clamps at ≤352 V under 4.3 A peak pulse current (IPP), and delivers sub-1 ns response time with <5 µA leakage above 10 V. It is used in industrial power supplies to safeguard rectifier outputs and DC bus nodes against lightning-induced surges.
For engineers reviewing the 1.5KE250A datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM margin relative to system operating voltage, VC vs. IPP performance at 1 ms pulse, UL 497B certification for isolated loop protection, and axial lead (Case 41A) mechanical compatibility with through-hole PCB layouts.
Technical Context
The 1.5KE250A operates as a Zener-based avalanche clamp, triggered when reverse voltage exceeds its 237–263 V breakdown range (VBR @ IT = 1 mA). Its low dynamic impedance ensures stable clamping during 1 ms transients, while thermal resistance of 20°C/W (RJL) supports reliable power dissipation under repeated surge events.
It complies with UL 497B for isolated loop circuit protection and meets Class 3 ESD immunity (>16 kV HBM). The device uses Surmetic axial-leaded plastic packaging (Case 41A), with cathode polarity marked by a band and maximum soldering temperature of 260°C at 1/16″ from case.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Power | 1500 W @ 1 ms pulse - sustains single high-energy surges without failure |
| VRWM | 214 V - maximum continuous reverse voltage before clamping begins |
| VBR (min/typ/max) | 237 / 250 / 263 V @ 1 mA - defines precise avalanche onset threshold |
| VC @ IPP | ≤352 V @ 4.3 A - maximum clamped voltage seen by protected circuit |
| IR @ VRWM | <5 µA - negligible standby leakage in high-impedance monitoring circuits |
| Response Time | <1 ns - limits voltage overshoot during fast-rising transients (e.g., EFT) |
| UL Recognition | UL 497B QVGQ2 - certified for isolated loop protection in telecom and industrial interfaces |
Pinout & Package
Package: Axial lead, Case 41A plastic housing (Surmetic), cathode indicated by color band. Dimensions: A = 8.5–9.5 mm length, B = 4.8–5.3 mm diameter, lead diameter uncontrolled per spec.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference node for reverse-biased operation | Connected to system ground or low-side return path in unidirectional clamp configuration |
| Cathode | Protected line connection point | Connected to the rail or signal line requiring overvoltage suppression; polarity band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W surge rating | Enables robust protection against IEC 61000-4-5 Level 4 (4 kV/2 Ω) surges on 24–48 V DC systems |
| UL 497B certification | Validates suitability for safety-critical isolated loop interfaces in medical and process control equipment |
| ESD Class 3 (>16 kV HBM) | Provides handling robustness during assembly and field service without additional ESD safeguards |
| Low zener impedance | Minimizes voltage rise across device during surge, reducing stress on downstream MOSFETs and ICs |
| Pb-free axial package | Meets RoHS compliance requirements while maintaining legacy through-hole mounting compatibility |
Applications
| Industrial Power Supply Input Protection | Telecom Line Interface Protection |
|---|---|
|
Use Scenario: Installed across AC-DC rectifier output or DC bus in programmable logic controller (PLC) power modules. IC Role / Device Role / Timing Role: Unidirectional TVS clamp absorbing 10/1000 µs lightning surges before they reach bulk capacitors and regulation ICs. Use Value: Prevents catastrophic failure of 24 V DC bus components during induced surges from nearby motor switching or grid faults. |
Use Scenario: Placed on tip/ring lines of RS-485 or analog telephone interface cards in building automation gateways. IC Role / Device Role / Timing Role: Primary overvoltage protector referenced to isolated ground, compliant with UL 497B for loop integrity. Use Value: Maintains communication link reliability during induced transients on long outdoor cable runs without compromising isolation barrier. |
| Medical Equipment DC Rail Protection | Process Control Sensor Signal Conditioning |
|
Use Scenario: Mounted across +5 V or +12 V internal supply rails feeding analog front-end ICs in patient monitoring devices. IC Role / Device Role / Timing Role: Fast-response clamp limiting transient overvoltage to safe levels for precision ADCs and op-amps. Use Value: Ensures signal integrity and regulatory compliance (IEC 60601-1) by preventing latch-up or parametric shift in sensitive analog circuitry. |
Use Scenario: Applied to 4–20 mA current loop inputs in distributed control system (DCS) I/O modules exposed to field wiring noise. IC Role / Device Role / Timing Role: High-energy transient absorber placed upstream of precision shunt resistors and instrumentation amplifiers. Use Value: Eliminates false trips and measurement errors caused by EFT bursts or inductive kickback from solenoid valves. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ220A | Lower peak power (600 W), smaller SMC package, VRWM = 220 V, VC = 356 V @ 2.7 A | Surface-mount only; unsuitable for high-surge legacy through-hole designs | Select when board space is constrained and surge energy is limited to IEC 61000-4-5 Level 3 |
| 1.5KE250CA | Bidirectional variant; identical VRWM, VBR, and VC specs but symmetric clamping for AC-coupled lines | Required for protection of balanced differential signals (e.g., CAN, RS-422) where polarity reversal occurs | Choose only if bidirectional clamping is mandated by signal topology - not a drop-in replacement for 1.5KE250A |
Compared with SMBJ220A, the 1.5KE250A provides 2.5× higher surge energy handling in axial form factor; compared with 1.5KE250CA, it offers lower capacitance and optimized unidirectional clamping for DC rail protection, avoiding unnecessary conduction during normal negative excursions.
Availability
1.5KE250A is available at Aetrix Electronics and suitable for industrial power supplies, telecom line interfaces, medical equipment DC rails, and process control sensor conditioning requiring stable component supply and long-term obsolescence management.
Supply support for 1.5KE250A 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
ON Semiconductor (now onsemi) is a global semiconductor supplier specializing in power management, analog, sensors, and discrete devices for automotive, industrial, and cloud power applications.
The 1.5KE250A belongs to the 1N6267A Series Mosorb TVS family, engineered for cost-effective, high-reliability overvoltage protection in harsh industrial environments with emphasis on UL-certified isolation and high-energy surge resilience.
FAQ
What is the clamping voltage of the 1.5KE250A under maximum surge conditions?
The 1.5KE250A clamps to a maximum of 352 V when subjected to its rated peak pulse current of 4.3 A (1 ms exponential decay waveform per Figure 5). This value is measured at the device terminals and represents the highest voltage imposed on the protected circuit during a full-power transient event. Designers must ensure downstream components have voltage ratings exceeding 352 V to guarantee survival.
Is the 1.5KE250A RoHS compliant and lead-free?
Yes, the 1.5KE250A is offered in Pb-free packaging (denoted by the "G" suffix in variants like 1.5KE250AG), fully compliant with RoHS Directive 2011/65/EU. The axial leads use matte tin plating over copper, and the Surmetic plastic body contains no restricted substances above threshold limits. Lead-free reflow and hand-soldering profiles are validated per onsemi's SOLDERINGRM/D manual.
Does the 1.5KE250A meet UL 497B certification?
Yes, the 1.5KE250A is explicitly covered under UL 497B recognition (File #E210057, category QVGQ2) for isolated loop circuit protection. This certification confirms successful completion of Strike Voltage Breakdown, Endurance Conditioning, Dielectric Withstand, and Discharge testing - validating its use in safety-critical telecom and industrial isolation barriers where failure could compromise system integrity.
How does the 1.5KE250A differ from the 1.5KE250CA?
The 1.5KE250A is unidirectional, conducting only during positive transients relative to its cathode; the 1.5KE250CA is bidirectional, clamping both polarities symmetrically. Their VBR, VRWM, and VC values are identical, but the CA version has double the junction capacitance and cannot replace the A version in DC rail protection without risking reverse conduction. The 1.5KE250A remains the correct choice for standard DC power line suppression.
What is the maximum steady-state power dissipation for the 1.5KE250A at 75°C lead temperature?
At a lead temperature (TL) of 75°C, the 1.5KE250A is rated for 5.0 W steady-state power dissipation. Above 75°C, it derates linearly at 20 mW/°C - meaning at 100°C TL, allowable PD drops to 4.5 W. This rating applies only to continuous DC or low-frequency reverse bias; surge handling remains governed by the 1500 W peak pulse limit independent of ambient temperature.
1.5KE250A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-201AD, Axial
- Series:
- Mosorb™
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 214V
- Voltage - Breakdown (Min):
- 237V
- Voltage - Clamping (Max) @ Ipp:
- 344V
- Current - Peak Pulse (10/1000µs):
- 5A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
1.5KE250A FAQ
1.How can I place an order for 1.5KE250A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE250A 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 1.5KE250A reliable?
The price and inventory of 1.5KE250A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE250A is usually 5 days.
3.What payment methods are accepted for 1.5KE250A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE250A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE250A?
1.5KE250A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE250A 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 1.5KE250A?
For technical support, including 1.5KE250A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE250A requirements.
6.How does Aetrix verify that 1.5KE250A is sourced from the original manufacturer or authorized distributors?
All 1.5KE250A 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 1.5KE250A meets industry standards.
7.What is the process for return or replacement of 1.5KE250A?
All 1.5KE250A units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE250A, 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 1.5KE250A part is unused and in its original packaging.
Return procedure for 1.5KE250A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE250A 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
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 …
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…
