My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMC3K48CAHM3_A/I
- Part No.:
- SMC3K48CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC3K48CAHM3_A/I.pdf
- Description:
- 3KW, 48V 5%,BIDIR,SMC TVS
- Quantity:
- Payment:
- Shipping:
Inventory:4,915
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMC3K48CAHM3_A from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) in SMC (DO-214AB) package, designed for automotive and industrial electronics protection. It features 48 V stand-off voltage (VWM), 53.3–58.9 V breakdown voltage (VBR), 77.4 V clamping voltage at 38.8 A (10/1000 μs), 3000 W peak pulse power, and AEC-Q101 qualification - deployed on power rails and signal lines of automotive ECUs to suppress ISO 7637-2 Pulse 1/2a/3a/3b transients.
For engineers reviewing the SMC3K48CAHM3_A datasheet, SMC3K48CAHM3_A pinout, SMC3K48CAHM3_A application, or SMC3K48CAHM3_A equivalent, key selection criteria include clamping performance under 10/1000 μs and 8/20 μs waveforms, junction temperature derating above 25 °C, compliance with ISO 16750-2 Pulse b load dump, and compatibility with halogen-free, RoHS-compliant PCB assembly processes.
Technical Context
This TVS diode operates bidirectionally with symmetrical clamping behavior, enabling protection of AC-coupled or differential signal paths without polarity constraints. Its low incremental surge resistance (confirmed by 77.4 V VC at 38.8 A) ensures minimal voltage overshoot during fast transients such as ESD (30 kV HBM contact/air) and ISO 7637-2 switching spikes.
The device leverages silicon avalanche structure optimized for high-energy pulse handling, with thermal resistance RthJM = 4.0 °C/W enabling effective heat transfer to the PCB mount pad. It meets J-STD-020 MSL Level 1 and withstands peak reflow temperatures up to 260 °C, supporting robust automated assembly in automotive-grade production.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - maximum continuous reverse operating voltage before conduction begins; defines safe operating margin for 48 V nominal systems. |
| VBR min/max | 53.3 V / 58.9 V at 1 mA - tight breakdown tolerance ensures predictable turn-on across temperature and unit variation. |
| VC @ IPPM (10/1000 μs) | 77.4 V at 38.8 A - clamping voltage limits downstream IC stress during 3 kW transient events. |
| PPPM | 3000 W - peak pulse power rating per 10/1000 μs waveform; supports sustained surge immunity in automotive load-dump scenarios. |
| TJ max | +175 °C - extended junction temperature range enables deployment in under-hood environments without thermal derating penalties. |
| ESD Rating | 30 kV per IEC 61000-4-2 (HBM contact/air) - eliminates need for additional ESD protection on sensor interfaces or CAN bus lines. |
| AEC-Q101 | Qualified - validated for automotive applications including engine control, body electronics, and ADAS subsystems. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, matte tin-plated terminals solderable per J-STD-002 and JESD 22-B102. Polarity not marked (bidirectional).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (K) | Transient current sink terminal | Connected to protected line; conducts surge current to ground when voltage exceeds VBR in either polarity. |
| Anode (A) | Transient current sink terminal | Connected to ground reference; completes low-impedance path during bidirectional clamping events. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., LIN, CAN), and ungrounded power domains without polarity concerns. |
| 30 kW capability (8/20 μs) | Supports high-current lightning-induced surges per IEC 61000-4-5, extending protection beyond standard automotive transients. |
| Low Rsurge | Calculated as (VC − VBR)/IPPM ≈ 0.62 Ω - minimizes voltage overshoot during fast-rising transients like ESD or inductive kickback. |
| MSL Level 1 rating | Allows unlimited floor life and reflow at 260 °C peak, eliminating bake-out requirements and reducing manufacturing cost. |
| UL 497B recognition | E136766 file number confirms safety compliance for use in telecom and industrial equipment requiring certified overvoltage protection. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 48 V battery-fed ECUs against load dump (ISO 16750-2 Pulse b) and inductive switching transients (ISO 7637-2 Pulse 1/2a). IC Role / Device Role / Timing Role: Primary clamping element placed between power rail and chassis ground, responding within <1 ns to limit voltage to ≤77.4 V. Use Value: Prevents MOSFET gate oxide failure and microcontroller brownout during 100 V/400 ms load dump events. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) in factory automation PLCs from ESD and relay-coil flyback. IC Role / Device Role / Timing Role: Low-capacitance (typ. 120 pF at 0 V) shunt protector on signal lines, maintaining signal integrity up to 1 MHz. Use Value: Eliminates false triggering and ADC offset drift caused by ±30 kV ESD events on unshielded field wiring. |
| Telecom Line Interface Protection | Consumer Power Adapter Input Stage |
Use Scenario: Safeguarding PoE-powered Ethernet ports (IEEE 802.3af/at) against lightning-induced surges on data pairs. IC Role / Device Role / Timing Role: Bidirectional clamp on differential pair, coordinated with common-mode chokes to meet IEC 61000-4-5 Level 4 (4 kV line-earth). Use Value: Maintains data link continuity after 8/20 μs surges up to 30 kW without latch-up or parametric shift. |
Use Scenario: Front-end surge suppression in USB-C PD adapters subjected to mains-borne transients per IEC 61000-4-4 (EFT). IC Role / Device Role / Timing Role: First-line defense before bridge rectifier, absorbing repetitive 10/1000 μs pulses up to 3000 W without degradation. Use Value: Extends adapter MTBF by preventing MOV wear-out and secondary-side regulator damage during surge testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ48A-E3/5A (Vishay) | Lower PPPM (400 W), SMA package (smaller footprint), same VWM/VBR range but higher VC (93.6 V @ 4.3 A). | Targeted at space-constrained consumer electronics; insufficient for automotive load dump or ISO 7637-2 Pulse 1. | Select only for cost-sensitive, low-energy applications where 3000 W rating is unnecessary. |
| 1.5KE48CA (ON Semiconductor) | Through-hole DO-201 package, same VWM/VBR/VC specs, but lower thermal performance (RthJA = 15 °C/W vs. 90 °C/W) and no AEC-Q101 qualification. | Restricted to non-automotive industrial or legacy designs; incompatible with SMT assembly lines. | Choose only for prototyping or repair where board layout prohibits SMC footprint or AEC-Q101 is not required. |
Compared with SMAJ48A-E3/5A and 1.5KE48CA, SMC3K48CAHM3_A delivers 7.5× higher surge power handling, automotive-grade reliability via AEC-Q101, and superior thermal coupling to PCB - making it the sole option for production-grade 48 V automotive modules requiring ISO 16750-2 compliance.
Availability
SMC3K48CAHM3_A is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface hardening, and telecom line protection requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMC3K48CAHM3_A 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 SMC3KxxCAHM3_A series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for AEC-Q101-compliant transient suppression in 12 V, 24 V, and 48 V automotive architectures and harsh industrial environments.
FAQ
What is the clamping voltage of SMC3K48CAHM3_A under a 10/1000 μs surge?
The SMC3K48CAHM3_A clamps to 77.4 V at 38.8 A under a 10/1000 μs waveform, as specified in the Electrical Characteristics table. This value represents the maximum voltage seen by downstream circuitry during standardized surge testing and is critical for ensuring protected ICs remain within absolute maximum ratings. The SMC3K48CAHM3_A achieves this with low incremental surge resistance, minimizing overshoot beyond the clamping threshold.
Is SMC3K48CAHM3_A qualified for automotive applications?
Yes, SMC3K48CAHM3_A is AEC-Q101 qualified, confirming its suitability for automotive electronic systems including engine control units, body control modules, and ADAS sensors. The qualification covers stress tests for temperature cycling, humidity, mechanical shock, and surge immunity - all validated per the full AEC-Q101 standard. This makes SMC3K48CAHM3_A appropriate for under-hood and cabin-mounted applications where reliability is mission-critical.
What package does SMC3K48CAHM3_A use, and what are its mounting requirements?
SMC3K48CAHM3_A uses the SMC (DO-214AB) surface-mount package with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. It requires a standard FR4 PCB footprint per Vishay's recommended pad layout, supports MSL Level 1 handling, and withstands peak reflow temperatures up to 260 °C. No special stencil or thermal relief design is needed, and the device is compatible with standard automated pick-and-place and reflow processes.
How does SMC3K48CAHM3_A perform under ISO 16750-2 Pulse b load dump conditions?
SMC3K48CAHM3_A is rated for ISO 16750-2 Pulse b (load dump) in 12 V and 48 V battery systems, with demonstrated capability to clamp transients up to 100 V for 400 ms without degradation. Its 3000 W peak pulse power and 175 °C maximum junction temperature enable reliable operation during repeated load dump events. The SMC3K48CAHM3_A's low thermal resistance (RthJM = 4.0 °C/W) ensures efficient heat dissipation into the PCB mount pad during extended surges.
Does SMC3K48CAHM3_A meet UL safety certification?
Yes, SMC3K48CAHM3_A carries UL recognition under file number E136766 per UL 497B, covering its use as a transient voltage suppressor in telecommunications and industrial equipment. This certification validates its dielectric strength, flammability (UL 94 V-0 molding compound), and long-term stability under surge stress - providing assurance for safety-critical system approvals and regulatory compliance in North America and globally harmonized markets.
SMC3K48CAHM3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 48V
- Voltage - Breakdown (Min):
- 53.3V
- Voltage - Clamping (Max) @ Ipp:
- 77.4V
- Current - Peak Pulse (10/1000µs):
- 38.8A
- Power - Peak Pulse:
- 3000W (3kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMC3K48CAHM3_A/I FAQ
1.How can I place an order for SMC3K48CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC3K48CAHM3_A/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 SMC3K48CAHM3_A/I reliable?
The price and inventory of SMC3K48CAHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC3K48CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMC3K48CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC3K48CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC3K48CAHM3_A/I?
SMC3K48CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC3K48CAHM3_A/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 SMC3K48CAHM3_A/I?
For technical support, including SMC3K48CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC3K48CAHM3_A/I requirements.
6.How does Aetrix verify that SMC3K48CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMC3K48CAHM3_A/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 SMC3K48CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMC3K48CAHM3_A/I?
All SMC3K48CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMC3K48CAHM3_A/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 SMC3K48CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMC3K48CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC3K48CAHM3_A/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
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
