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Vishay General Semiconductor - Diodes Division 5KASMC28AHM3_A/H
- Part No.:
- 5KASMC28AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
5KASMC28AHM3_A/H.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:628
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Product details
Overview
5KASMC28AHM3_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 45.4 V at 110.1 A, and operates with a 28 V stand-off voltage (VWM), 31.1–34.4 V breakdown range (VBR), and 185 °C maximum junction temperature - enabling robust protection of MOSFETs and sensor signal lines in engine control units.
For engineers reviewing the 5KASMC28AHM3_A/H datasheet, 5KASMC28AHM3_A/H pinout, 5KASMC28AHM3_A/H application, or 5KASMC28AHM3_A/H equivalent, key selection criteria include its SMC (DO-214AB) package, AEC-Q101 qualification, 100 °C/W junction-to-ambient thermal resistance, unidirectional polarity, and compliance with J-STD-020 MSL level 1 at 260 °C peak reflow.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to achieve stable clamping under repetitive surge stress and high-temperature operation up to TJ = 185 °C. Its low incremental surge resistance and fast response time ensure effective suppression of transients induced by inductive load switching in 12 V and 24 V automotive systems.
The device is rated for 5000 W peak pulse power per 10/1000 μs waveform and exhibits a typical temperature coefficient of VBR at +0.089 %/°C. It meets UL 94 V-0 flammability requirements and features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 μs) | 5000 W - sustains high-energy surges without failure in automotive load-dump events |
| Stand-off Voltage (VWM) | 28 V - blocks normal operating voltage while remaining inactive until transients exceed threshold |
| Breakdown Voltage (VBR) | 31.1–34.4 V at 1 mA - defines precise turn-on threshold for controlled clamping onset |
| Clamping Voltage (VC) | 45.4 V at 110.1 A - limits downstream voltage stress during worst-case surge conditions |
| Junction Temperature Range | −65 °C to +185 °C - supports under-hood deployment and extended thermal reliability |
| Thermal Resistance (RθJA) | 100 °C/W - determines safe power derating on standard PCB pad layouts |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability and lifetime performance per stress test requirements |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, with cathode indicated by color band. Dimensions: 7.11 mm × 6.22 mm × 2.62 mm (L × W × H). Matte tin-plated terminals meet J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during reverse-biased clamping | Connected to protected line (e.g., battery rail); conducts surge current into ground path |
| Cathode | Current exit terminal during clamping; marked with band | Connected to system ground; establishes reference for voltage clamping action |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier design ensures stable VBR and leakage over temperature and life |
| High-temperature capability | TJ max = 185 °C enables placement near heat sources in engine control modules |
| Surge robustness | 5000 W peak pulse power withstands ISO 7637-2 Load Dump Pulse 5a (12 V systems) |
| Low clamping ratio | VC/VBR ≈ 1.38 - minimizes overvoltage stress on downstream ICs during surge events |
| MSL Level 1 rating | Compatible with standard SMT reflow profiles up to 260 °C peak, no dry-pack required |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Digital Input Module |
|---|---|
Use Scenario: Protecting microcontroller I/O and power supply inputs from load dump and alternator ripple in 12 V vehicle systems. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery rail and local regulator input. Use Value: Limits transient voltage to ≤45.4 V during 5000 W pulses, preventing latch-up or damage to 5 V/3.3 V logic supplies. |
Use Scenario: Safeguarding 24 V digital input circuitry against field-wiring induced surges in factory automation panels. IC Role / Device Role / Timing Role: Primary surge shunt across input terminals before optocoupler or Schmitt trigger stage. Use Value: Clamps 24 V line transients within 1 ns, preserving signal integrity and enabling >100 kV/μs ESD immunity per IEC 61000-4-5. |
| Automotive Sensor Signal Line Protection | Telecom Power Supply DC Input Stage |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from coupled noise in chassis-grounded vehicles. IC Role / Device Role / Timing Role: Low-capacitance TVS placed at connector interface to suppress common-mode transients. Use Value: Maintains <20 μA leakage at 28 V, avoiding signal offset errors while clamping EFT bursts per ISO 16750-2. |
Use Scenario: Front-end protection of 48 V telecom rectifier outputs against lightning-induced surges on outdoor plant wiring. IC Role / Device Role / Timing Role: Secondary surge suppressor after MOV-based primary protection, handling residual fast transients. Use Value: Provides precise 45.4 V clamping with <2.0 μA IR at VWM, ensuring clean DC bus regulation under repeated surge stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ28A (Bourns) | Same VWM (28 V), lower PPPM (600 W), SMB package (smaller footprint, higher RθJA) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a | Select only for space-constrained consumer electronics with <1 kW surge exposure |
| SMCJ28A (Littelfuse) | Identical VWM (28 V), same SMC package, but rated for 3000 W PPPM (10/1000 μs) and TJ = 175 °C | Lower surge margin and thermal ceiling than 5KASMC28AHM3_A/H; not AEC-Q101 qualified | Acceptable for industrial non-automotive use where AEC-Q101 is not mandated |
Compared with SMBJ28A and SMCJ28A, the 5KASMC28AHM3_A/H provides 67 % higher peak pulse power, 10 °C higher junction temperature rating, and formal AEC-Q101 qualification - making it the only option among the three validated for under-hood automotive deployment with full load-dump immunity.
Availability
5KASMC28AHM3_A/H is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, telecom power supplies, and sensor interface modules requiring stable component supply with guaranteed long-term manufacturability and AEC-Q101 traceability.
Supply support for 5KASMC28AHM3_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 passive components for automotive, industrial, and computing markets.
The 5KASMCxxA family was engineered specifically for high-temperature, high-surge automotive environments - delivering AEC-Q101-qualified transient protection with industry-leading 185 °C junction capability and 5000 W pulse robustness in the SMC package.
FAQ
What is the clamping voltage of the 5KASMC28AHM3_A/H at its rated peak pulse current?
The 5KASMC28AHM3_A/H has a maximum clamping voltage (VC) of 45.4 V when subjected to its peak pulse current (IPPM) of 110.1 A under the standard 10/1000 μs waveform. This value is measured at TA = 25 °C and defines the upper voltage limit imposed on protected circuits during worst-case surge events. The 5KASMC28AHM3_A/H maintains this clamping performance across its full operating temperature range due to its +0.089 %/°C VBR temperature coefficient.
Is the 5KASMC28AHM3_A/H suitable for bidirectional transient protection?
No, the 5KASMC28AHM3_A/H is a unidirectional TVS diode and is not rated for bidirectional operation. Its electrical characteristics - including breakdown voltage, clamping behavior, and leakage - are specified only for reverse-bias conduction. For bidirectional protection, a dedicated bidirectional part such as the 5KASMC28CA must be used. The 5KASMC28AHM3_A/H's cathode band marking confirms its polarity-sensitive orientation in-circuit.
Does the 5KASMC28AHM3_A/H require derating at elevated ambient temperatures?
Yes, the 5KASMC28AHM3_A/H must be derated above TA = 25 °C per Figure 2 in its datasheet. Its peak pulse power capability decreases linearly with increasing initial junction temperature, and its DC power dissipation (PD = 6.5 W) is limited by thermal resistance RθJA = 100 °C/W. At 100 °C ambient, usable DC power drops to approximately 4.0 W. Derating curves apply to both continuous and repetitive surge conditions.
What does the "HM3_A/H" suffix indicate in the 5KASMC28AHM3_A/H part number?
The "HM3" denotes the halogen-free, RoHS-compliant, AEC-Q101-qualified SMC package variant with matte tin-plated leads. "A" is the revision code; "H" specifies the packaging format: 7-inch plastic tape and reel, 850 units per reel. This ordering suffix directly maps to Vishay's preferred package code and delivery mode - critical for procurement accuracy and SMT line compatibility.
How does the 5KASMC28AHM3_A/H compare to standard SMA/SMB TVS diodes in surge handling?
The 5KASMC28AHM3_A/H delivers 5000 W peak pulse power - over 8× higher than typical SMA (600 W) or SMB (600 W) TVS diodes. Its SMC (DO-214AB) package provides superior thermal mass and lower thermal resistance, enabling sustained energy absorption without thermal runaway. Unlike smaller packages, the 5KASMC28AHM3_A/H maintains clamping stability under repeated 10/1000 μs surges at 185 °C junction temperature.
5KASMC28AHM3_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):
- 28V
- Voltage - Breakdown (Min):
- 31.1V
- Voltage - Clamping (Max) @ Ipp:
- 45.4V
- 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)
5KASMC28AHM3_A/H FAQ
1.How can I place an order for 5KASMC28AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 5KASMC28AHM3_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 5KASMC28AHM3_A/H reliable?
The price and inventory of 5KASMC28AHM3_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 5KASMC28AHM3_A/H is usually 5 days.
3.What payment methods are accepted for 5KASMC28AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 5KASMC28AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 5KASMC28AHM3_A/H?
5KASMC28AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 5KASMC28AHM3_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 5KASMC28AHM3_A/H?
For technical support, including 5KASMC28AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 5KASMC28AHM3_A/H requirements.
6.How does Aetrix verify that 5KASMC28AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All 5KASMC28AHM3_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 5KASMC28AHM3_A/H meets industry standards.
7.What is the process for return or replacement of 5KASMC28AHM3_A/H?
All 5KASMC28AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 5KASMC28AHM3_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 5KASMC28AHM3_A/H part is unused and in its original packaging.
Return procedure for 5KASMC28AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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