My Inquiry
My Account
onsemi 1.5KE250AG
- Part No.:
- 1.5KE250AG
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
1.5KE250AG.pdf
- Description:
- TVS DIODE 214VWM 344VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:6,708
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5KE250AG from ON Semiconductor is a unidirectional 1500 W transient voltage suppressor (TVS) diode designed for parallel clamping protection of sensitive electronics against ESD, lightning surges, and inductive switching transients. It features a 214 V working peak reverse voltage (VRWM), 354 V maximum clamping voltage (VC) at 4.2 A peak pulse current (IPP), and sub-1 ns response time - deployed in industrial power supplies, telecom line cards, and medical equipment input stages.
For engineers reviewing the 1.5KE250AG datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM margin over operating DC bus, VC headroom relative to protected IC absolute maximum ratings, UL 497B certification for isolated loop compliance, and axial lead (Case 41A) thermal derating above 75°C.
Technical Context
This device operates as a silicon avalanche diode with sharp Zener-like breakdown characteristics. Its clamping action begins at VBR = 237–263 V (measured at IT = 1 mA), stabilizes under 1 ms 1500 W pulses, and maintains low dynamic impedance (<1 Ω typical) during surge events. Thermal resistance is 20°C/W junction-to-lead, enabling reliable operation with 3/8″ lead length at TL ≤ 75°C.
It complies with UL 497B for isolated loop circuit protection and achieves Class 3 ESD immunity (>16 kV HBM). The Pb-free Surmetic axial package (Case 41A) supports wave and hand soldering at 260°C for 10 seconds at 1/16″ from case, with cathode polarity marked by a band.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Power | 1500 W @ 1 ms pulse - sustains single high-energy transients without failure |
| VRWM | 214 V - maximum continuous reverse voltage before significant leakage; sets minimum system DC bus rating |
| VBR (min/max) | 237 V / 263 V @ IT = 1 mA - defines precise breakdown threshold for design margining |
| VC @ IPP | 354 V @ 4.2 A - clamping voltage seen by protected circuit during worst-case surge |
| IR @ VRWM | <5 µA - negligible standby leakage, critical for high-impedance sensing nodes |
| Response Time | <1 ns - ensures clamping initiates before transient edge propagates into downstream ICs |
| ESD Rating | Class 3 (>16 kV HBM) - meets IEC 61000-4-2 Level 4 system-level ESD robustness |
Pinout & Package
1.5KE250AG uses an axial-leaded Surmetic plastic package (Case 41A), with cathode identified by a colored band. Leads are tin-plated copper, corrosion-resistant, and solderable per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current return path | Connected to system ground or low-impedance reference plane; must minimize trace inductance |
| Cathode | Clamped output node | Connected to protected line (e.g., DC input rail); polarity band marks this terminal |
Key Features
| Feature | Design Value |
|---|---|
| UL 497B Recognition | Validated for isolated loop protection - enables use in telecom/data line interfaces without additional certification effort |
| Low Clamping Ratio (VC/VBR) | 1.33–1.49 - tight voltage control reduces overvoltage stress on downstream MOSFETs and controllers |
| Pb-Free Surmetic Package | RoHS-compliant axial construction with void-free molding - ensures long-term reliability in humid industrial environments |
| Thermal Derating Profile | 20 mW/°C above 75°C ambient - enables accurate lifetime estimation in enclosed power supply enclosures |
| High Surge Current Capability | 4.2 A IPP at 214 V VRWM - supports IEC 61000-4-5 Level 4 (4 kV/2 Ω) surge testing with margin |
Applications
| Industrial AC/DC Power Supplies | Telecom Line Interface Protection |
|---|---|
Use Scenario: Input stage protection of 240 VAC-derived 300 VDC bus against lightning-induced surges and load dump transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed across bulk capacitor terminals. Use Value: Limits transient voltage to ≤354 V, preventing overvoltage failure of PFC controller and main switch MOSFETs rated for 600 V. |
Use Scenario: Protection of RS-485 transceiver inputs on outdoor base station backhaul links exposed to induced surges. IC Role / Device Role / Timing Role: Primary surge clamp on differential data lines referenced to isolated earth ground. Use Value: UL 497B certification validates safe operation in isolated loop architectures required by telecom safety standards. |
| Medical Equipment Mains Input | Process Control Signal Conditioning |
Use Scenario: Mains-connected diagnostic imaging equipment requiring IEC 60601-1 compliance for transient immunity. IC Role / Device Role / Timing Role: Secondary overvoltage protector downstream of MOV-based primary suppression. Use Value: Sub-1 ns response ensures clamping occurs before fast-rising transients exceed 354 V, preserving isolation barrier integrity. |
Use Scenario: 4–20 mA analog sensor loop protection in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Reverse-polarity and surge protector on field-side signal terminals. Use Value: 214 V VRWM allows direct placement on 24 VDC loops with >8× operating voltage margin, eliminating need for series resistors. |
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 | 600 W rating, 220 V VRWM, SMC package (surface-mount) | Lower power handling; suited for PCB space-constrained designs with lower surge exposure | Select when board area is limited and IEC 61000-4-5 Level 3 (2 kV) suffices |
| 1.5KE250A | Identical electrical specs; legacy SnPb plating (non-Pb-free) | No functional difference; differs only in RoHS compliance status and solderability profile | Choose 1.5KE250AG for new designs requiring Pb-free compliance and J-STD-020 reflow compatibility |
Compared with SMBJ220A, 1.5KE250AG delivers 2.5× higher surge energy absorption and axial through-hole mounting for high-reliability power entry; versus 1.5KE250A, it provides identical protection performance with certified Pb-free terminations and broader solder process compatibility.
Availability
1.5KE250AG is available at Aetrix Electronics and suitable for industrial AC/DC power supplies, telecom line interface protection, and medical equipment mains input requiring stable component supply and full UL 497B certification.
Supply support for 1.5KE250AG 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 is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, and medical applications.
The 1.5KE250AG belongs to the 1N6267A Series Mosorb TVS family - engineered specifically for high-reliability, high-power transient suppression in harsh industrial and telecom environments where UL recognition and consistent clamping performance are mandatory.
FAQ
What is the clamping voltage of the 1.5KE250AG under maximum surge conditions?
The 1.5KE250AG has a maximum clamping voltage (VC) of 354 V at its rated peak pulse current (IPP) of 4.2 A, measured using the 1 ms exponential waveform defined in Figure 5 of the datasheet. This value represents the highest voltage the protected circuit will experience during a full 1500 W transient event. Designers must ensure downstream components have sufficient voltage margin above 354 V to avoid damage. The 1.5KE250AG maintains this clamping performance across its qualified temperature range of −65°C to +175°C.
Does the 1.5KE250AG meet UL 497B requirements for isolated loop protection?
Yes, the 1.5KE250AG is explicitly covered under UL 497B recognition (File #E210057, QVGQ2 category) as confirmed in the "UL RECOGNITION" section of the official ON Semiconductor datasheet. This certification applies to the full 1.5KE6.8A through 1.5KE250A range and validates performance in isolated loop architectures, including passing strike voltage breakdown, endurance conditioning, and dielectric withstand tests. The 1.5KE250AG is therefore approved for use in telecom and industrial data line isolation barriers without additional third-party validation.
What is the breakdown voltage tolerance of the 1.5KE250AG?
The 1.5KE250AG has a specified breakdown voltage (VBR) range of 237 V to 263 V at a test current (IT) of 1 mA, representing ±10% tolerance around the nominal 250 V rating. This tolerance is tightly controlled during manufacturing and verified per JEDEC test methods. Designers should use the minimum VBR (237 V) to confirm adequate VRWM margin and the maximum VBR (263 V) to verify that clamping remains within safe limits for downstream components. The 1.5KE250AG's temperature coefficient of VBR is 0.106 %/°C, ensuring predictable drift over operating temperature.
Can the 1.5KE250AG be used in surface-mount designs?
No, the 1.5KE250AG is exclusively offered in an axial-leaded Surmetic plastic package (Case 41A) and is not available in surface-mount form. It requires through-hole mounting with 3/8″ lead length for thermal derating compliance. For SMT alternatives, engineers should consider the SMBJ220A or SMAJ220A families - though these offer lower peak power (600 W or 400 W) and different VRWM ratings. The 1.5KE250AG's axial construction is optimized for high-current, high-reliability power entry points where mechanical robustness and thermal mass are prioritized over board density.
What is the maximum steady-state power dissipation for the 1.5KE250AG?
The 1.5KE250AG has a steady-state power dissipation (PD) rating of 5.0 W at lead temperature (TL) ≤ 75°C, with linear derating of 20 mW/°C above that temperature. This rating applies only to continuous DC or low-frequency reverse bias conditions - not transient suppression events. In normal operation, leakage current is <5 µA at VRWM (214 V), resulting in negligible steady-state power (<1.1 mW). The 5.0 W limit becomes relevant only in abnormal fault conditions such as sustained overvoltage, and must be managed via thermal design of the PCB mount and surrounding copper area.
1.5KE250AG 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
1.5KE250AG FAQ
1.How can I place an order for 1.5KE250AG through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE250AG 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 1.5KE250AG reliable?
The price and inventory of 1.5KE250AG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE250AG is usually 5 days.
3.What payment methods are accepted for 1.5KE250AG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE250AG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE250AG?
1.5KE250AG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE250AG 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 1.5KE250AG?
For technical support, including 1.5KE250AG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE250AG requirements.
6.How does Aetrix verify that 1.5KE250AG is sourced from the original manufacturer or authorized distributors?
All 1.5KE250AG 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 1.5KE250AG meets industry standards.
7.What is the process for return or replacement of 1.5KE250AG?
All 1.5KE250AG units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE250AG, 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 1.5KE250AG part is unused and in its original packaging.
Return procedure for 1.5KE250AG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE250AG 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…
