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Vishay General Semiconductor - Diodes Division 5KASMC26AHM3/9A
- Part No.:
- 5KASMC26AHM3/9A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
5KASMC26AHM3/9A.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,474
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Product details
Overview
5KASMC26AHM3/9A from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) package, designed for high-energy surge protection with 5000 W peak pulse power (10/1000 μs), 26 V stand-off voltage, and 42.1 V maximum clamping voltage at 118.8 A peak pulse current. It operates from −65 °C to +185 °C and is AEC-Q101 qualified for automotive electronics protection.
For engineers reviewing the 5KASMC26AHM3/9A datasheet, 5KASMC26AHM3/9A pinout, 5KASMC26AHM3/9A application, or 5KASMC26AHM3/9A equivalent, key selection criteria include clamping performance under 10/1000 μs transients, thermal stability up to TJ = 185 °C, unidirectional polarity, MSL Level 1 reliability, and compatibility with automated SMT assembly on standard PCB pad layouts.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to deliver low incremental surge resistance and fast response time-critical for suppressing inductive switching spikes before sensitive ICs or MOSFETs are damaged. Its junction temperature rating of 185 °C enables operation in under-hood automotive environments and industrial motor drive control units without derating.
The device is optimized for single-polarity transient suppression on DC power rails and signal lines where reverse conduction must be blocked. Clamping behavior is characterized at IT = 1.0 mA (VBR = 28.9–31.9 V) and validated at IPPM with 10/1000 μs waveform per ANSI/IEEE C62.35, ensuring predictable voltage limiting during ESD and lightning-induced surges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before leakage exceeds 2 μA; defines safe DC rail placement. |
| VBR (min/max) | 28.9 V / 31.9 V at IT = 1.0 mA - Ensures reliable breakdown onset across process variation and temperature. |
| VC @ IPPM | 42.1 V at 118.8 A - Limits voltage seen by protected circuit during worst-case 5000 W transient event. |
| PPPM (10×1000 μs) | 5000 W - Withstands high-energy surges common in automotive load-dump and industrial relay switching. |
| TJ max. | +185 °C - Supports AEC-Q101 compliance and long-term reliability in high-ambient environments. |
| RθJA | 100 °C/W - Thermal resistance determines required copper area for thermal management on standard FR-4 PCB. |
| Polarity | Unidirectional - Blocks reverse current; requires correct cathode orientation relative to protected line polarity. |
Pinout & Package
Package: DO-214AB (SMCJ), surface-mount, halogen-free, RoHS-compliant, MSL Level 1 (260 °C peak reflow), matte tin-plated leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge current sink terminal | Connected to protected line; absorbs positive transients when referenced to ground or lower potential. |
| Anode | Reference/return terminal | Typically tied to system ground or low-side reference; completes clamping path during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Enables stable leakage performance (<2 μA at VWM) and long-term reliability under thermal cycling and humidity stress. |
| AEC-Q101 qualification | Validates robustness for automotive applications including engine control modules and body electronics. |
| 5000 W peak pulse power | Provides margin against ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 surge events in industrial systems. |
| Fast response time | Sub-nanosecond turn-on ensures clamping occurs before downstream MOSFETs or microcontrollers experience overvoltage damage. |
| Low RSURGE | Minimizes voltage overshoot during high-di/dt events, improving protection fidelity for fast-rising transients. |
Applications
| Automotive Power Rail Protection | Industrial Motor Drive Control |
|---|---|
Use Scenario: Protecting 24 V supply inputs of engine control units (ECUs) against load-dump transients up to 60 V. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery rail and DC-DC input stage. Use Value: Limits clamped voltage to ≤42.1 V, preventing damage to downstream LDOs and MCU power pins rated for 36 V absolute max. |
Use Scenario: Safeguarding gate drivers and current-sense amplifiers in variable-frequency drives exposed to inductive kickback. IC Role / Device Role / Timing Role: Parallel-connected TVS on half-bridge high-side and low-side supply rails. Use Value: Absorbs 118.8 A surge current within 1000 μs, maintaining gate voltage integrity and avoiding false triggering of protection circuits. |
| Telecom Power Interface | Consumer Sensor Module Input |
Use Scenario: Surge protection on 48 V PoE-powered base station front-end interfaces subject to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS on DC input before DC-DC converter and Ethernet PHY power conditioning. Use Value: Withstands 5000 W peak pulse energy while maintaining <2 μA leakage at 26 V, preserving standby power budget. |
Use Scenario: Protecting analog sensor inputs (e.g., pressure, temperature) in smart home hubs connected to external wiring harnesses. IC Role / Device Role / Timing Role: Low-capacitance TVS on differential signal lines adjacent to ADC inputs. Use Value: Clamps ESD events to ≤42.1 V without distorting small-signal integrity due to minimal junction capacitance at VWM. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26A-E3/57 | Lower PPPM (400 W), smaller SMA package (DO-214AC), VBR = 28.9–31.9 V, same VWM = 26 V | Suitable for lower-energy surges; not rated for AEC-Q101 or 185 °C operation | Select when space-constrained and surge threat level is limited to IEC 61000-4-2 ESD only. |
| 1.5KE27A | Higher power (1500 W), axial-leaded DO-201 package, VBR = 28.9–31.9 V, VWM = 23.1 V | Requires through-hole mounting; lacks MSL Level 1 and automotive qualification | Choose for legacy board designs or prototyping where SMT is unavailable and thermal mass is sufficient. |
Compared with SMAJ26A-E3/57 and 1.5KE27A, the 5KASMC26AHM3/9A delivers 12.5× higher surge power handling, automotive-grade reliability, and SMT compatibility-making it optimal for production-grade automotive and industrial power rail protection where sustained thermal performance and high-energy immunity are mandatory.
Availability
5KASMC26AHM3/9A is available at Aetrix Electronics and suitable for automotive ECUs, industrial motor drives, telecom power interfaces, and consumer sensor modules requiring stable component supply and long-term lifecycle support.
Supply support for 5KASMC26AHM3/9A 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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, thermal performance, and automotive qualification.
The 5KASMC series targets high-reliability transient suppression in harsh environments, engineered specifically for AEC-Q101 compliance, 185 °C operation, and 5000 W surge immunity in compact SMCJ packaging.
FAQ
What is the maximum clamping voltage of the 5KASMC26AHM3/9A under a 10/1000 μs surge?
The 5KASMC26AHM3/9A has a maximum clamping voltage (VC) of 42.1 V when subjected to its rated peak pulse current of 118.8 A using the standardized 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that protected downstream components see no more than 42.1 V during such transient events, provided layout minimizes parasitic inductance.
Is the 5KASMC26AHM3/9A suitable for automotive applications?
Yes, the 5KASMC26AHM3/9A is AEC-Q101 qualified and rated for junction temperatures up to +185 °C, making it suitable for under-hood automotive applications including engine control units, body control modules, and ADAS power supplies. Its DO-214AB package meets MSL Level 1 and supports lead-free reflow profiles up to 260 °C.
What does the "HM3/9A" suffix indicate in 5KASMC26AHM3/9A?
The "HM3" suffix denotes halogen-free, RoHS-compliant construction with JESD 201 Class 2 whisker resistance; "/9A" specifies packaging in 13-inch diameter plastic tape and reel containing 3500 units. This format ensures compatibility with high-speed SMT pick-and-place equipment and satisfies automotive traceability requirements.
How does the 5KASMC26AHM3/9A differ from bidirectional TVS diodes?
The 5KASMC26AHM3/9A is unidirectional and blocks reverse current beyond VWM, making it ideal for DC power rail protection where polarity is fixed. Bidirectional variants would conduct in both directions and are used for AC or data-line protection. Using a unidirectional device like the 5KASMC26AHM3/9A avoids unintended conduction on negative-going transients in DC systems.
What is the thermal resistance from junction to ambient for the 5KASMC26AHM3/9A?
The typical thermal resistance from junction to ambient (RθJA) for the 5KASMC26AHM3/9A is 100 °C/W when mounted on the minimum recommended PCB pad layout per Vishay's datasheet. This value guides copper area design for thermal management-larger copper pours reduce effective RθJA and improve power dissipation capability during repetitive surge events.
5KASMC26AHM3/9A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 42.1V
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- 5000W (5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
5KASMC26AHM3/9A FAQ
1.How can I place an order for 5KASMC26AHM3/9A through Aetrix?
Please submit a Request for Quotation (RFQ) for 5KASMC26AHM3/9A 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 5KASMC26AHM3/9A reliable?
The price and inventory of 5KASMC26AHM3/9A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 5KASMC26AHM3/9A is usually 5 days.
3.What payment methods are accepted for 5KASMC26AHM3/9A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 5KASMC26AHM3/9A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 5KASMC26AHM3/9A?
5KASMC26AHM3/9A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 5KASMC26AHM3/9A 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 5KASMC26AHM3/9A?
For technical support, including 5KASMC26AHM3/9A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 5KASMC26AHM3/9A requirements.
6.How does Aetrix verify that 5KASMC26AHM3/9A is sourced from the original manufacturer or authorized distributors?
All 5KASMC26AHM3/9A 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 5KASMC26AHM3/9A meets industry standards.
7.What is the process for return or replacement of 5KASMC26AHM3/9A?
All 5KASMC26AHM3/9A units undergo pre-shipment inspection (PSI). If there is an issue with 5KASMC26AHM3/9A, 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 5KASMC26AHM3/9A part is unused and in its original packaging.
Return procedure for 5KASMC26AHM3/9A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
5KASMC26AHM3/9A Tags
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