My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5SMC43AHM3/I
- Part No.:
- 1.5SMC43AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC43AHM3/I.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,439
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5SMC43AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, rated for 43 V breakdown voltage (VBR = 40.9–45.2 V at IT = 1.0 mA), 36.8 V stand-off voltage (VWM), and 59.3 V maximum clamping voltage (VC) at 25.3 A peak pulse current (IPPM). It delivers 1500 W peak pulse power with 10/1000 µs waveform and is halogen-free, RoHS-compliant, and AEC-Q101 qualified - designed for automotive-grade overvoltage protection of power rails and signal lines.
For engineers reviewing the 1.5SMC43AHM3/I datasheet, 1.5SMC43AHM3/I pinout, 1.5SMC43AHM3/I application, or 1.5SMC43AHM3/I equivalent, key selection criteria include clamping performance under 10/1000 µs transients, thermal resistance (RθJA = 75 °C/W), junction temperature limit (TJ = 150 °C), and compliance with automotive reliability standards.
Technical Context
This unidirectional TVS diode operates by avalanche breakdown to clamp transient overvoltages above its VWM threshold, limiting downstream voltage to ≤59.3 V during 25.3 A surges. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM).
Designed for automated SMT assembly on standard PCB pads (0.31" × 0.31"), it meets MSL Level 1 per J-STD-020 (peak reflow 260 °C) and supports repetitive surge duty cycles up to 0.01 %, with thermal derating above 25 °C ambient per Fig. 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 40.9 V / 45.2 V at 1.0 mA test current - defines precise avalanche onset range for reliable clamping initiation |
| VWM | 36.8 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 59.3 V at 25.3 A - peak clamped voltage during 1500 W transient, directly limiting stress on protected ICs |
| PPPM | 1500 W - peak pulse power handling with 10/1000 µs waveform, enabling robust lightning/inductive-spike suppression |
| RθJA | 75 °C/W - junction-to-ambient thermal resistance on standard 8.0 mm × 8.0 mm copper pads, critical for thermal design margin |
| TJ max. | +150 °C - maximum allowable junction temperature, supporting operation in under-hood automotive environments |
| AEC-Q101 | Qualified - validated for automotive reliability including temperature cycling, HTRB, and ESD per AEC specification |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Polarity marked by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | High-side connection in unidirectional configuration | Connected to protected line; avalanche conduction occurs when line voltage exceeds VBR relative to anode |
| Anode | Low-side reference (typically GND or return path) | Provides current return path during clamping; must be routed with low-inductance layout to maintain VC integrity |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 µs) | Enables suppression of high-energy transients such as ISO 7637-2 Pulse 5a without device failure |
| AEC-Q101 qualification (HM3 suffix) | Validated for automotive electronics including engine control units and ADAS sensor interfaces |
| Halogen-free, RoHS-compliant construction | Meets environmental compliance requirements for global automotive and industrial OEMs |
| MSL Level 1 moisture sensitivity | Allows direct placement without baking, reducing manufacturing cost and process complexity |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for sensitive MOSFETs and MCUs |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-supplied ECUs against load dump and alternator transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp positive-going surges. Use Value: Limits rail voltage to ≤59.3 V during 25.3 A transients, preventing damage to 36 V-rated DC-DC converters and microcontrollers. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in factory automation systems exposed to relay switching noise. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to shunt induced EFT/burst energy before reaching ADC input stage. Use Value: Clamps fast 10/1000 µs spikes to safe levels while maintaining <1.0 µA leakage at 36.8 V, preserving signal accuracy. |
| Telecom Line Surge Protection | Consumer Power Adapter Input Stage |
Use Scenario: Secondary-side DC bus protection in PoE-powered network switches subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Unidirectional suppressor on +48 V output rail to absorb coupled transients from Ethernet magnetics. Use Value: Withstands 1500 W pulses without degradation, ensuring system uptime during outdoor installation surges. |
Use Scenario: Input-stage overvoltage clamp in universal-input AC/DC adapters for smart home devices. IC Role / Device Role / Timing Role: Standoff-rated TVS across bulk capacitor to suppress MOV-failure follow-on surges. Use Value: Maintains 36.8 V standoff while clamping to 59.3 V, compatible with 60 V-rated primary-side controllers and MOSFETs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43A-E3/52 | Same VBR range (40.9–45.2 V) but SMB package (DO-214AA); lower PPPM = 600 W; RθJA = 85 °C/W | Lower power handling limits use to sub-1 kV/microsecond transients; unsuitable for ISO 7637-2 Pulse 5a | Select when board space is constrained and surge energy is limited to <600 W |
| 1.5KE43A | Through-hole DO-15 package; identical electrical specs but higher RθJA (~100 °C/W); no AEC-Q101 or halogen-free certification | Not suitable for automated SMT lines or automotive qualification requirements | Choose only for legacy through-hole designs where rework flexibility outweighs production efficiency |
Compared with SMBJ43A-E3/52 and 1.5KE43A, the 1.5SMC43AHM3/I provides superior surge robustness (1500 W vs. 600 W or unlisted), automotive qualification, and SMT manufacturability - making it the preferred choice for new automotive and industrial designs requiring AEC-Q101 compliance and high-energy clamping.
Availability
1.5SMC43AHM3/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom power supplies, and consumer adapter input stages requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1.5SMC43AHM3/I 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, TVS devices, and optoelectronics with emphasis on reliability and application-specific performance.
The 1.5SMC Series was developed to deliver high-power, surface-mount transient suppression for automotive, industrial, and telecom systems where space, thermal performance, and qualification rigor are critical.
FAQ
What is the clamping voltage of the 1.5SMC43AHM3/I under a 10/1000 µs transient?
The 1.5SMC43AHM3/I has a maximum clamping voltage (VC) of 59.3 V at 25.3 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per standard test conditions (TA = 25 °C, mounted on 8.0 mm × 8.0 mm copper pads) and defines the upper voltage limit imposed on protected circuitry during surge events. The 1.5SMC43AHM3/I maintains this clamping performance consistently across its qualified operating temperature range.
Is the 1.5SMC43AHM3/I suitable for automotive applications?
Yes, the 1.5SMC43AHM3/I is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant, and automotive-grade construction. It is specifically intended for use in automotive powertrain, body electronics, and ADAS systems where reliability under temperature cycling, humidity, and high-energy transients is mandatory. The 1.5SMC43AHM3/I meets all required stress tests including HTGB, HTRB, and TCT per AEC-Q101 Rev G.
What does the "HM3" suffix mean in 1.5SMC43AHM3/I?
The "HM3" suffix in 1.5SMC43AHM3/I denotes halogen-free, RoHS-compliant, and AEC-Q101 qualified construction. It distinguishes this variant from commercial-grade versions (e.g., "M3") and confirms compliance with automotive reliability standards, material restrictions, and assembly requirements including MSL Level 1 and whisker resistance per JESD 201 Class 2. The "I" indicates packaging in 13-inch tape-and-reel (3500 pcs/reel).
How does the thermal performance of the 1.5SMC43AHM3/I compare to smaller packages like SMBJ?
The 1.5SMC43AHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W on standard 8.0 mm × 8.0 mm copper pads - significantly lower than SMBJ-series devices (~85 °C/W). This enables higher sustained power dissipation and better thermal stability during repetitive transients. The 1.5SMC43AHM3/I's larger SMC (DO-214AB) footprint improves heat spreading versus SMB (DO-214AA), directly supporting its 1500 W rating where SMBJ43A is limited to 600 W.
Can the 1.5SMC43AHM3/I replace a 1.5KE43A in an existing design?
The 1.5SMC43AHM3/I shares identical electrical specifications (VBR, VWM, VC, PPPM) with the through-hole 1.5KE43A but requires PCB layout changes due to its SMC (DO-214AB) surface-mount footprint. While electrically interchangeable for clamping function, the 1.5SMC43AHM3/I adds AEC-Q101 qualification, halogen-free materials, and MSL Level 1 compatibility - benefits not present in the 1.5KE43A. Migration requires pad redesign but enables automated assembly and automotive compliance.
1.5SMC43AHM3/I 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):
- 36.8V
- Voltage - Breakdown (Min):
- 40.9V
- Voltage - Clamping (Max) @ Ipp:
- 59.3V
- Current - Peak Pulse (10/1000µs):
- 25.3A
- 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)
1.5SMC43AHM3/I FAQ
1.How can I place an order for 1.5SMC43AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC43AHM3/I 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 1.5SMC43AHM3/I reliable?
The price and inventory of 1.5SMC43AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC43AHM3/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC43AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC43AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC43AHM3/I?
1.5SMC43AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC43AHM3/I 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 1.5SMC43AHM3/I?
For technical support, including 1.5SMC43AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC43AHM3/I requirements.
6.How does Aetrix verify that 1.5SMC43AHM3/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC43AHM3/I 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 1.5SMC43AHM3/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC43AHM3/I?
All 1.5SMC43AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC43AHM3/I, 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 1.5SMC43AHM3/I part is unused and in its original packaging.
Return procedure for 1.5SMC43AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC43AHM3/I 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 …
