My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 5KASMC40AHM3/57
- Part No.:
- 5KASMC40AHM3/57
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
5KASMC40AHM3/57.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,916
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
5KASMC40AHM3/57 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 on power and signal lines. It features 44.4 V minimum breakdown voltage (VBR), 40 V standoff voltage (VWM), 64.5 V maximum clamping voltage (VC) at 77.5 A peak pulse current, and 5000 W peak pulse power (10/1000 µs). It is AEC-Q101 qualified and rated for 185 °C junction temperature, making it suitable for automotive power rail protection.
For engineers reviewing the 5KASMC40AHM3/57 datasheet, 5KASMC40AHM3/57 pinout, 5KASMC40AHM3/57 application, or 5KASMC40AHM3/57 equivalent, key selection criteria include clamping performance under 77.5 A surge, thermal resistance (RθJA = 100 °C/W), unidirectional polarity, MSL Level 1 moisture sensitivity, and compatibility with automated SMT assembly at 260 °C peak reflow.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology to deliver stable clamping across temperature and lifetime. Its 185 °C maximum junction temperature and AEC-Q101 qualification confirm suitability for under-hood automotive environments where thermal cycling and long-term reliability are critical.
The device operates exclusively in unidirectional mode with a cathode band marking, and achieves low incremental surge resistance for consistent voltage limiting during fast transients. Its 10/1000 µs waveform rating reflects standardized IEC 61000-4-5 surge immunity testing conditions used in industrial and automotive EMC validation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Standoff Voltage) | 40 V - Maximum continuous reverse operating voltage before conduction begins; defines safe operating margin below system nominal voltage. |
| VBR (Breakdown Voltage) | 44.4–49.1 V @ 1 mA - Voltage at which device enters avalanche breakdown; ensures reliable triggering above normal operating voltage. |
| VC (Clamping Voltage) | 64.5 V @ 77.5 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; determines downstream component stress. |
| PPPM | 5000 W (10/1000 µs) - Surge energy handling capacity; supports protection against ISO 7637-2 Pulse 5a/b and IEC 61000-4-5 Level 4 surges. |
| TJ max | 185 °C - Enables operation in high-temperature zones such as engine control units without derating penalties. |
| RθJA | 100 °C/W - Thermal resistance from junction to ambient on minimum recommended pad layout; informs PCB copper area requirements. |
| MSL Level | Level 1 (per J-STD-020) - Allows unlimited floor life and standard reflow without baking; simplifies manufacturing logistics. |
Pinout & Package
Package: DO-214AB (SMCJ), surface-mount, molded plastic case with matte tin-plated leads, UL 94 V-0 rated, halogen-free, RoHS-compliant, and AEC-Q101 qualified. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or lower-potential rail; completes current path during transient clamp event. |
| Cathode | High-side connection point | Connected to protected line (e.g., 42 V battery rail); polarity-sensitive-reverse connection disables protection. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier design improves long-term stability of VBR and leakage under thermal stress. |
| 185 °C TJ capability | Supports sustained operation in engine bay or powertrain modules without thermal shutdown or parameter drift. |
| 5000 W peak pulse power | Handles repetitive load-dump events per ISO 7637-2 without degradation when properly heatsinked. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns rise time), improving protection fidelity. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including HTOL, TC, UHAST, and ESD testing per stress test plan. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 42 V battery-fed ECUs from load dump transients up to 60 V and 100 ms duration. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between battery rail and DC-DC input stage. Use Value: Limits voltage to ≤64.5 V during 77.5 A surge, preventing damage to downstream PMICs and microcontrollers. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and switching noise in factory automation PLCs. IC Role / Device Role / Timing Role: Low-capacitance (typ. <100 pF) transient shunt mounted directly at connector interface. Use Value: Clamps fast transients (<1 ns rise) while maintaining signal integrity due to minimal parasitic capacitance. |
| Telecom DC Power Input Protection | Computer PSU Hold-Up Circuit Protection |
Use Scenario: Safeguarding -48 V telecom rectifier outputs against lightning-induced surges on outdoor cabinet feeds. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side DC bus prior to isolation transformer or filter stage. Use Value: Withstands repeated 5 kV/500 A surges per IEC 61000-4-5 with no parameter shift after 1000 pulses. |
Use Scenario: Preventing hold-up capacitor overvoltage during AC line dropout followed by sudden restoration in ATX PSUs. IC Role / Device Role / Timing Role: Standoff-rated TVS across bulk capacitor terminals to absorb stored energy rebound. Use Value: 40 V VWM allows safe operation during 36–40 V nominal hold-up range while clamping spikes >60 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ40A-E3/57 | Lower PPPM (400 W), smaller SMA package (DO-214AC), VC = 64.5 V @ 6.2 A | Rated for consumer-grade, non-automotive use; not AEC-Q101 qualified; limited to <100 A surge currents | Select when cost and board space are prioritized over automotive reliability and high-energy surge handling. |
| 5.0SMDJ40A | Same 5000 W rating but larger DO-214AB package, VC = 64.5 V @ 77.5 A, AEC-Q101 qualified | Identical electrical specs but different marking and reel packaging; functionally interchangeable in layout | Choose when sourcing flexibility or alternate tape/reel configurations (e.g., 3500-unit reels) are required. |
Compared with SMAJ40A-E3/57 and 5.0SMDJ40A, the 5KASMC40AHM3/57 offers identical clamping performance and AEC-Q101 compliance but distinguishes itself via HM3 suffix indicating halogen-free, whisker-tested construction and optimized thermal resistance for high-reliability mounting on minimum pad layouts.
Availability
5KASMC40AHM3/57 is available at Aetrix Electronics and suitable for automotive power management, industrial sensor interface design, and telecom DC input protection requiring stable component supply and full AEC-Q101 traceability.
Supply support for 5KASMC40AHM3/57 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, MOSFETs, optoelectronics, and passive components with emphasis on high-reliability, high-power, and automotive-qualified solutions.
The 5KASMCxxA series targets high-energy transient suppression in harsh-environment applications, specifically engineered to meet ISO 7637-2 and IEC 61000-4-5 requirements for automotive and industrial power systems.
FAQ
What is the maximum clamping voltage of the 5KASMC40AHM3/57 under surge conditions?
The 5KASMC40AHM3/57 has a maximum clamping voltage (VC) of 64.5 V when subjected to a 10/1000 µs surge waveform at 77.5 A peak pulse current. This value is measured per ANSI/IEEE C62.35 standards and represents the highest voltage the protected circuit will experience during a defined transient event. The 5KASMC40AHM3/57 maintains this clamping performance across its full operating temperature range (-65 °C to +185 °C).
Is the 5KASMC40AHM3/57 suitable for automotive applications?
Yes, the 5KASMC40AHM3/57 is AEC-Q101 qualified and rated for 185 °C maximum junction temperature, making it suitable for under-hood and powertrain applications. Its DO-214AB package meets MSL Level 1 and withstands 260 °C peak reflow, and its 5000 W surge rating supports ISO 7637-2 load-dump protection. The 5KASMC40AHM3/57 is explicitly designed for automotive-grade reliability and thermal robustness.
What does the "HM3" suffix indicate in 5KASMC40AHM3/57?
The "HM3" suffix denotes halogen-free, RoHS-compliant construction with matte tin-plated leads that pass JESD 201 Class 2 whisker testing. It also confirms AEC-Q101 qualification and compliance with Vishay's material categorization per doc# 99912. The "/57" indicates 7-inch tape-and-reel packaging with 850 units per reel. The 5KASMC40AHM3/57 uses this suffix to signal full automotive process and environmental compliance.
How does the 5KASMC40AHM3/57 differ from bidirectional TVS diodes?
The 5KASMC40AHM3/57 is unidirectional only, meaning it conducts only during positive surges relative to its cathode-anode orientation. Unlike bidirectional devices, it cannot suppress negative-going transients on AC lines or differential signals. Its unidirectional design yields lower leakage and tighter VBR tolerance, making the 5KASMC40AHM3/57 ideal for DC rail protection where polarity is fixed and leakage must be minimized.
What is the thermal resistance of the 5KASMC40AHM3/57 on standard PCB layout?
The 5KASMC40AHM3/57 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on the minimum recommended pad layout per Vishay's datasheet. This value assumes no additional copper pour or thermal vias. For higher power dissipation, designers should increase copper area or add thermal vias to reduce effective RθJA. The 5KASMC40AHM3/57 also specifies RθJM = 20.8 °C/W for junction-to-mount interface, supporting heatsink integration.
5KASMC40AHM3/57 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):
- 40V
- Voltage - Breakdown (Min):
- 44.4V
- Voltage - Clamping (Max) @ Ipp:
- 64.5V
- 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)
5KASMC40AHM3/57 FAQ
1.How can I place an order for 5KASMC40AHM3/57 through Aetrix?
Please submit a Request for Quotation (RFQ) for 5KASMC40AHM3/57 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 5KASMC40AHM3/57 reliable?
The price and inventory of 5KASMC40AHM3/57 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 5KASMC40AHM3/57 is usually 5 days.
3.What payment methods are accepted for 5KASMC40AHM3/57?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 5KASMC40AHM3/57 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 5KASMC40AHM3/57?
5KASMC40AHM3/57 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 5KASMC40AHM3/57 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 5KASMC40AHM3/57?
For technical support, including 5KASMC40AHM3/57 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 5KASMC40AHM3/57 requirements.
6.How does Aetrix verify that 5KASMC40AHM3/57 is sourced from the original manufacturer or authorized distributors?
All 5KASMC40AHM3/57 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 5KASMC40AHM3/57 meets industry standards.
7.What is the process for return or replacement of 5KASMC40AHM3/57?
All 5KASMC40AHM3/57 units undergo pre-shipment inspection (PSI). If there is an issue with 5KASMC40AHM3/57, 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 5KASMC40AHM3/57 part is unused and in its original packaging.
Return procedure for 5KASMC40AHM3/57:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
5KASMC40AHM3/57 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
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
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 …
