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Vishay General Semiconductor - Diodes Division 5KASMC24AHM3_A/H
- Part No.:
- 5KASMC24AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
5KASMC24AHM3_A/H.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,826
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Product details
Overview
5KASMC24AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for high-energy surge protection in automotive and industrial power rails. It delivers 5000 W peak pulse power (10/1000 μs), clamps at 38.9 V at 128.5 A, and operates with 24 V stand-off voltage (VWM), 26.7–29.5 V breakdown (VBR), and 185 °C maximum junction temperature - deployed to safeguard MOSFETs and sensor signal lines against inductive switching transients.
For engineers reviewing the 5KASMC24AHM3_A/H datasheet, 5KASMC24AHM3_A/H pinout, 5KASMC24AHM3_A/H application, or 5KASMC24AHM3_A/H equivalent, key selection criteria include its AEC-Q101 qualification, SMC (DO-214AB) package compatibility, 2.0 μA max reverse leakage at VWM, low incremental surge resistance, and TJ = 185 °C capability for under-hood automotive environments.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology optimized for junction stability under repeated surge stress. Its unidirectional polarity enables precise clamping on positive-going transients, and it meets MSL Level 1 per J-STD-020 with 260 °C reflow peak tolerance.
The device exhibits a typical thermal resistance of 100 °C/W (junction-to-ambient) and 20.8 °C/W (junction-to-mount), supporting reliable operation on standard PCB pad layouts without forced cooling. Its temperature coefficient of VBR is +0.087 %/°C, enabling predictable voltage drift over temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before conduction begins; defines safe blocking range in normal circuit operation. |
| VBR (min/typ/max) | 26.7 / 28.1 / 29.5 V at 1 mA - Verified breakdown threshold ensures consistent clamping onset across production lots and temperature. |
| VC @ IPPM | 38.9 V at 128.5 A - Clamping voltage during 10/1000 μs surge; determines maximum stress imposed on protected downstream components. |
| PPPM | 5000 W (10/1000 μs) - Peak surge energy handling capacity; validates suitability for ISO 7637-2 Pulse 5a/b and IEC 61000-4-5 Level 4 threats. |
| TJ max | +185 °C - Enables deployment in high-temperature zones such as engine control units and power inverters without derating. |
| IR @ VWM | 2.0 μA - Low leakage preserves system efficiency and battery life in always-on automotive modules. |
| AEC-Q101 | Qualified - Confirmed reliability for automotive electronics per stress test requirements including HTGB, HTRB, and TCT. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during clamping | Connected to protected line (e.g., 24 V rail); conducts surge current toward ground when voltage exceeds VBR. |
| Cathode | Current exit terminal during clamping | Connected to ground reference; polarity marking ensures correct orientation to prevent reverse-bias failure. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier process improves long-term surge endurance and reduces parameter drift after repeated transients. |
| MSL Level 1 rating | Supports single-reflow assembly without moisture-induced popcorning; eliminates bake requirement prior to SMT placement. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (< 1 ns), enhancing protection margin for sensitive gate drivers. |
| Halogen-free & RoHS-compliant | Meets automotive OEM environmental mandates and simplifies end-of-life recycling compliance for Tier 1 suppliers. |
| 185 °C junction capability | Enables direct placement near heat sources (e.g., DC-DC converters) without thermal derating or heatsinking. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply lines in engine control modules from load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device absorbing >5000 W surges while maintaining <39 V clamping ceiling. Use Value: Prevents latch-up or permanent damage to microcontrollers and CAN transceivers during ISO 7637-2 Pulse 5a events. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loops) of pressure sensors in factory automation systems. IC Role / Device Role / Timing Role: Fast-response transient suppressor limiting induced spikes to ≤38.9 V within nanoseconds. Use Value: Maintains signal integrity and avoids false triggering in PLC input stages subjected to relay coil switching noise. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Safeguarding PoE-powered network switches against lightning-induced surges on 48 V DC inputs. IC Role / Device Role / Timing Role: High-power unidirectional clamp placed upstream of DC-DC converters and Ethernet PHYs. Use Value: Withstands 10/1000 μs surges up to 128.5 A without degradation, preserving uptime in outdoor telecom cabinets. |
Use Scenario: Suppressing back-EMF transients generated by brushed DC motors in smart home appliances. IC Role / Device Role / Timing Role: Transient absorber connected across motor terminals or H-bridge outputs. Use Value: Limits voltage overshoot to 38.9 V, preventing gate oxide rupture in integrated motor driver ICs rated for 40 V max. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A-E3/5A (Vishay) | Lower PPPM (400 W), smaller SMA package, same VWM/VBR range but lower surge current (32.4 A vs. 128.5 A). | Suitable for low-energy signal-line protection; insufficient for 24 V power rail load dump. | Select only for space-constrained, low-surge environments where 5KASMC24AHM3_A/H's 5000 W rating is unnecessary. |
| SMCJ24A (Littelfuse) | Nearly identical ratings: VWM = 24 V, VBR = 26.7–29.5 V, VC = 38.9 V, PPPM = 5000 W, same SMC package and AEC-Q101 qualification. | Drop-in functional replacement with validated automotive use history; minor differences in thermal resistance (RθJA = 100 °C/W vs. 95 °C/W). | Valid alternative when dual-sourcing is required; verify layout compatibility via footprint alignment check before substitution. |
Compared with SMAJ24A-E3/5A and SMCJ24A, the 5KASMC24AHM3_A/H offers identical clamping performance and AEC-Q101 compliance but distinguishes itself with Vishay's passivated anisotropic rectifier architecture-proven for extended lifetime under repetitive surge stress in high-temperature automotive deployments.
Availability
5KASMC24AHM3_A/H is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom DC input surge suppression requiring stable component supply across multi-year production cycles.
Supply support for 5KASMC24AHM3_A/H 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 high-reliability diodes, MOSFETs, and optoelectronics for automotive, industrial, and computing markets.
The 5KASMC series belongs to Vishay's PAR® (Protection Against Risk) transient voltage suppressor family, engineered specifically for AEC-Q101-compliant, high-temperature-stable surge protection in harsh-environment power electronics.
FAQ
What is the maximum clamping voltage of the 5KASMC24AHM3_A/H under full-rated surge current?
The 5KASMC24AHM3_A/H clamps to a maximum of 38.9 V when subjected to its rated peak pulse current of 128.5 A (10/1000 μs waveform). This value is measured per standard test conditions in the Vishay datasheet (Document Number: 89432) and defines the upper voltage limit imposed on protected circuitry during worst-case transients. The 5KASMC24AHM3_A/H maintains this clamping performance across its full operating temperature range up to TJ = 185 °C.
Is the 5KASMC24AHM3_A/H qualified for automotive applications?
Yes, the 5KASMC24AHM3_A/H is AEC-Q101 qualified, confirming its reliability for automotive electronic systems. It has passed stress tests including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling (TCT), and supports operation up to +185 °C junction temperature - meeting requirements for under-hood ECUs and ADAS power supplies. The 5KASMC24AHM3_A/H also complies with MSL Level 1 and JESD201 Class 2 whisker testing.
What package type does the 5KASMC24AHM3_A/H use, and what are its mounting requirements?
The 5KASMC24AHM3_A/H uses the SMC (DO-214AB) surface-mount package, with cathode identified by a color band. It requires standard SMT reflow per J-STD-020 (MSL Level 1, 260 °C peak), and Vishay specifies minimum recommended pad layout for optimal thermal dissipation. The 5KASMC24AHM3_A/H achieves RθJA = 100 °C/W on that layout and RθJM = 20.8 °C/W when mounted on an infinite heatsink - no additional thermal interface material is needed for most automotive applications.
How does the 5KASMC24AHM3_A/H compare to standard SMA-jacketed TVS diodes in surge handling?
The 5KASMC24AHM3_A/H delivers 5000 W peak pulse power (10/1000 μs), over 12× higher than typical SMA-package TVS diodes like SMAJ24A (400 W). Its larger SMC body enables higher surge current (128.5 A vs. ~32 A) and superior thermal mass, making the 5KASMC24AHM3_A/H suitable for load-dump protection where SMA devices would fail catastrophically. The 5KASMC24AHM3_A/H also features enhanced junction passivation for longer service life under repetitive stress.
What is the reverse leakage current specification for the 5KASMC24AHM3_A/H at rated stand-off voltage?
The 5KASMC24AHM3_A/H specifies a maximum reverse leakage current (IR) of 2.0 μA at its 24 V stand-off voltage (VWM) and 25 °C ambient temperature. At elevated temperatures (e.g., TJ = 150 °C), leakage increases to 50 μA - still well within design margins for low-power automotive modules. This low IR ensures minimal standby power loss and prevents false triggering in high-impedance sensing circuits protected by the 5KASMC24AHM3_A/H.
5KASMC24AHM3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 38.9V
- 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)
5KASMC24AHM3_A/H FAQ
1.How can I place an order for 5KASMC24AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 5KASMC24AHM3_A/H 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 5KASMC24AHM3_A/H reliable?
The price and inventory of 5KASMC24AHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 5KASMC24AHM3_A/H is usually 5 days.
3.What payment methods are accepted for 5KASMC24AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 5KASMC24AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 5KASMC24AHM3_A/H?
5KASMC24AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 5KASMC24AHM3_A/H 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 5KASMC24AHM3_A/H?
For technical support, including 5KASMC24AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 5KASMC24AHM3_A/H requirements.
6.How does Aetrix verify that 5KASMC24AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All 5KASMC24AHM3_A/H 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 5KASMC24AHM3_A/H meets industry standards.
7.What is the process for return or replacement of 5KASMC24AHM3_A/H?
All 5KASMC24AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 5KASMC24AHM3_A/H, 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 5KASMC24AHM3_A/H part is unused and in its original packaging.
Return procedure for 5KASMC24AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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