My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5SMC56AHM3/H
- Part No.:
- 1.5SMC56AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC56AHM3/H.pdf
- Description:
- TVS DIODE 47.8VWM 77VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,603
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5SMC56AHM3/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 56 V standoff voltage (VWM), 62.7 V minimum breakdown voltage (VBR), 77.0 V maximum clamping voltage (VC) at 19.5 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 μs waveform - deployed in automotive sensor interfaces, industrial I/O modules, and DC power rail protection.
For engineers reviewing the 1.5SMC56AHM3/H datasheet, 1.5SMC56AHM3/H pinout, 1.5SMC56AHM3/H application, or 1.5SMC56AHM3/H equivalent, key selection criteria include clamping performance under 10/1000 μs surge, unidirectional polarity marking, SMC (DO-214AB) package thermal resistance (RθJL = 15 °C/W), and AEC-Q101 qualification status for automotive-grade reliability.
Technical Context
This device operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to deliver fast response (<1 ns) and low incremental surge resistance. Its clamping behavior is defined by a 10/1000 μs waveform test condition, with derating above 25 °C per Fig. 2 and thermal resistance RθJA = 75 °C/W on standard 8.0 mm × 8.0 mm copper pads.
The 1.5SMC56AHM3/H exhibits a temperature coefficient of VBR = +0.103 %/°C and maximum reverse leakage ID = 1.0 μA at 47.8 V, confirming stable off-state blocking. Its halogen-free, RoHS-compliant construction meets JESD201 Class 2 whisker resistance and MSL Level 1 reflow compatibility (260 °C peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 47.8 V - Maximum continuous reverse operating voltage before significant leakage begins; defines safe DC bias margin. |
| VBR (Breakdown min) | 53.2 V - Minimum voltage at which avalanche conduction initiates at 1 mA test current; ensures predictable turn-on threshold. |
| VC (Clamping max) | 77.0 V - Maximum voltage across device during 19.5 A 10/1000 μs surge; determines protected circuit's worst-case overvoltage exposure. |
| PPPM | 1500 W - Peak pulse power handling capability; enables suppression of high-energy transients like ISO 7637-2 Pulse 5a. |
| IFSM | 200 A - Non-repetitive forward surge current rating (8.3 ms half-sine); supports inrush or fault-current tolerance in power rails. |
| TJ max | +150 °C - Maximum junction temperature; allows operation in under-hood automotive environments and industrial enclosures. |
| RθJL | 15 °C/W - Junction-to-leads thermal resistance; enables accurate thermal modeling when mounted on PCB copper pads. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD22-B102. Cathode indicated by band marking; polarity critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to protected line ground or low-side reference; carries full surge current during clamping. |
| Cathode | Reverse-biased terminal / Clamping node | Connected to protected IC or MOSFET gate/drain; defines VWM and VC reference point during transient events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces per stress test requirements. |
| Halogen-free & RoHS-compliant | Meets environmental compliance mandates for industrial and consumer electronics without compromising surge robustness. |
| 1500 W 10/1000 μs rating | Withstands high-energy transients common in 12 V/24 V vehicle systems and industrial PLC backplanes. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes voltage overshoot during clamping, reducing stress on downstream 5 V or 3.3 V logic components. |
| MSL Level 1 moisture sensitivity | Enables direct placement without baking; compatible with standard SMT reflow profiles up to 260 °C peak. |
Applications
| Automotive Sensor Interface Protection | Industrial DC Power Rail Clamp |
|---|---|
Use Scenario: Protecting CAN/LIN transceivers and analog sensor front-ends (e.g., pressure, temperature) from load-dump and jump-start transients in passenger vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor supply line and chassis ground, acting as primary overvoltage clamp during ISO 16750-2 Pulse 5a events. Use Value: Limits voltage seen by 5 V LDOs and microcontrollers to ≤77.0 V, preventing latch-up or oxide damage while maintaining AEC-Q100 system compliance. |
Use Scenario: Safeguarding 24 V input rails in programmable logic controllers (PLCs) against inductive switching spikes from solenoid drivers and relay coils. IC Role / Device Role / Timing Role: Standoff-connected TVS on main DC input, conducting only during >47.8 V surges with sub-nanosecond response to limit energy transfer. Use Value: Absorbs 1500 W peak pulses without degradation, enabling reliable operation in harsh factory-floor environments with frequent EMI coupling. |
| Telecom Line Card Surge Suppression | Consumer Power Adapter Input Protection |
Use Scenario: Secondary-level protection on Ethernet PHY power supplies and PoE injectors exposed to lightning-induced surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Unidirectional clamping device placed after primary GDT/MOV stage to refine voltage limiting and reduce let-through energy. Use Value: Achieves precise 77.0 V clamping with <1.0 μA leakage at 47.8 V, preserving standby efficiency while meeting Telcordia GR-1089-CORE Zone 3 requirements. |
Use Scenario: Input-stage transient suppression in USB-C PD adapters and AC/DC wall adapters subjected to mains-borne surges and ESD. IC Role / Device Role / Timing Role: First-line TVS on secondary-side 12–20 V output rails, shunting fast transients before they reach synchronous rectifiers or controller ICs. Use Value: Halogen-free construction satisfies IEC 62368-1 material requirements while delivering 19.5 A surge current handling at 77.0 V clamping. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ56A | Same VWM (47.8 V), lower PPPM (600 W), SMB package (smaller footprint, higher RθJA = 85 °C/W) | Limited to lower-energy transients (e.g., ESD, contact discharge); unsuitable for ISO 7637-2 Pulse 5a. | Select when board space is constrained and surge energy is ≤600 W; verify thermal margin with reduced copper area. |
| 1.5KE56A | Same VWM and VC, axial-lead DO-201 package, higher RθJA (100 °C/W), not AEC-Q101 qualified | Requires through-hole assembly; lacks automotive qualification and surface-mount automation support. | Choose only for legacy through-hole designs or prototyping where reflow compatibility and AEC-Q101 are not required. |
Compared with SMBJ56A and 1.5KE56A, the 1.5SMC56AHM3/H delivers superior 1500 W surge capacity in an AEC-Q101-qualified SMC package, enabling drop-in use in automotive and industrial SMT production without layout or reliability compromises.
Availability
1.5SMC56AHM3/H is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, telecom line cards, and consumer power adapters requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for 1.5SMC56AHM3/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 1.5SMC Series was engineered specifically for surface-mount transient suppression in demanding environments, combining high-power surge handling with AEC-Q101 qualification and halogen-free compliance for next-generation electronic systems.
FAQ
What is the clamping voltage of the 1.5SMC56AHM3/H under a 10/1000 μs surge?
The 1.5SMC56AHM3/H has a maximum clamping voltage (VC) of 77.0 V at 19.5 A peak pulse current with a 10/1000 μs waveform. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuits during standardized surge events. The 1.5SMC56AHM3/H maintains this clamping performance across its specified operating temperature range.
Is the 1.5SMC56AHM3/H AEC-Q101 qualified?
Yes, the 1.5SMC56AHM3/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" and documentation in the 1.5SMC Series datasheet (Document Number: 88303). This qualification covers stress tests including high-temperature operating life, temperature cycling, and ESD, making the 1.5SMC56AHM3/H suitable for automotive powertrain and body electronics.
What does the "HM3" suffix indicate in 1.5SMC56AHM3/H?
The "HM3" suffix in 1.5SMC56AHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. The "H" indicates 7-inch tape-and-reel packaging (850 units per reel), while "M3" specifies the halogen-free material set compliant with JESD201 Class 2 whisker resistance and UL 94 V-0 flammability rating.
What is the standoff voltage (VWM) and why is it critical for the 1.5SMC56AHM3/H?
The 1.5SMC56AHM3/H has a standoff voltage (VWM) of 47.8 V - the maximum DC or RMS voltage that can be continuously applied without exceeding 1.0 μA leakage current. This parameter ensures the 1.5SMC56AHM3/H remains non-conductive during normal operation while providing sufficient margin below the 56 V nominal system voltage, preventing false triggering during ripple or tolerance drift.
How does the SMC (DO-214AB) package of the 1.5SMC56AHM3/H impact thermal performance?
The SMC (DO-214AB) package of the 1.5SMC56AHM3/H provides a junction-to-leads thermal resistance (RθJL) of 15 °C/W and junction-to-ambient (RθJA) of 75 °C/W on 8.0 mm × 8.0 mm copper pads. This enables efficient heat dissipation during repetitive surge events and supports reliable operation at TJ up to +150 °C - critical for under-hood automotive and enclosed industrial applications where airflow is limited.
1.5SMC56AHM3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 47.8V
- Voltage - Breakdown (Min):
- 53.2V
- Voltage - Clamping (Max) @ Ipp:
- 77V
- Current - Peak Pulse (10/1000µs):
- 19.5A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC56AHM3/H FAQ
1.How can I place an order for 1.5SMC56AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC56AHM3/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 1.5SMC56AHM3/H reliable?
The price and inventory of 1.5SMC56AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC56AHM3/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC56AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC56AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC56AHM3/H?
1.5SMC56AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC56AHM3/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 1.5SMC56AHM3/H?
For technical support, including 1.5SMC56AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC56AHM3/H requirements.
6.How does Aetrix verify that 1.5SMC56AHM3/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC56AHM3/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 1.5SMC56AHM3/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC56AHM3/H?
All 1.5SMC56AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC56AHM3/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 1.5SMC56AHM3/H part is unused and in its original packaging.
Return procedure for 1.5SMC56AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC56AHM3/H 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 …
