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Vishay General Semiconductor - Diodes Division SMCJ48AHM3_A/I
- Part No.:
- SMCJ48AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ48AHM3_A/I.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,771
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Product details
Overview
SMCJ48AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) in SMC (DO-214AB) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. It features a 48 V stand-off voltage (VWM), 53.3–58.9 V breakdown voltage (VBR), 77.4 V maximum clamping voltage (VC) at 19.4 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform.
For engineers reviewing the SMCJ48AHM3_A/I datasheet, SMCJ48AHM3_A/I pinout, SMCJ48AHM3_A/I application, or SMCJ48AHM3_A/I equivalent, key selection criteria include clamping performance under 10/1000 µs surge, thermal resistance (RθJA = 75 °C/W), AEC-Q101 qualification status, halogen-free RoHS compliance, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ48AHM3_A/I uses a glass-passivated silicon junction for low incremental surge resistance and fast response time (<1 ns), enabling effective suppression of ESD and lightning-induced transients. Its unidirectional polarity-marked with a cathode band-supports DC-biased signal and power line protection where reverse conduction must be blocked.
Designed for operation across -55 °C to +150 °C junction temperature range, it delivers stable clamping performance with 0.103 %/°C temperature coefficient of VBR and meets J-STD-020 MSL Level 1 (260 °C peak reflow). The device is rated for 200 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine) and exhibits 1.0 µA max reverse leakage at VWM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin for protected lines. |
| VBR min/max | 53.3 V / 58.9 V - Breakdown occurs within this range at 1 mA test current; ensures predictable turn-on threshold. |
| VC @ IPPM | 77.4 V - Clamped voltage at 19.4 A peak pulse current (10/1000 µs); determines maximum stress on downstream ICs. |
| PPPM | 1500 W - Peak pulse power handling capability; supports high-energy surge immunity per IEC 61000-4-5. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on standard PCB pad layout; informs derating above 25 °C ambient. |
| TJ max | +150 °C - Maximum allowable junction temperature; sets upper limit for thermal design margin in enclosed environments. |
| ID @ VWM | 1.0 µA - Reverse leakage at stand-off voltage; critical for low-power sensor or battery-backed circuits. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by molded band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry (unidirectional) | Connected to lower-potential side of protected line; conducts during forward surge events only. |
| Cathode | Reverse-biased terminal (marked with band) | Connected to higher-potential side; blocks reverse current and clamps when reverse voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per stress test requirements. |
| Halogen-free & RoHS-compliant | Meets environmental compliance for global automotive and industrial end markets without compromising surge performance. |
| Low incremental surge resistance | Enables tighter clamping (VC/VBR ratio ≈ 1.45) and reduced let-through energy during transient events. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profile (peak 260 °C) without baking preconditioning. |
| Glass passivated junction | Provides stable electrical characteristics over lifetime and improved resistance to humidity and contamination. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V power rails in engine control units (ECUs) and body control modules (BCMs) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and LDO input to clamp transients before they reach voltage regulators and microcontrollers. Use Value: Withstands 1500 W peak pulse and clamps to ≤77.4 V, preventing damage to 5 V or 3.3 V logic supplies downstream. | Use Scenario: Safeguarding analog front-end inputs of pressure, temperature, or position sensors exposed to ESD and cable discharge events. IC Role / Device Role / Timing Role: Placed at connector interface to shunt fast transients (<1 ns rise time) before reaching precision amplifier or ADC input stages. Use Value: Low leakage (1.0 µA) avoids signal offset errors; fast response preserves integrity of low-level mV-range sensor signals. |
| Telecom DC Power Feeds | Consumer Device USB/DC Input Protection |
Use Scenario: Protecting PoE-powered equipment (e.g., IP cameras, access points) from surges on 48 V DC power feeds. IC Role / Device Role / Timing Role: Mounted directly at DC input connector to absorb lightning-induced surges per IEC 61000-4-5 Level 4 (4 kV/2 kA). Use Value: 1500 W rating and 77.4 V clamping ensure safe operation even under worst-case 10/1000 µs surge conditions. | Use Scenario: Securing 5 V/9 V/12 V DC input ports of smart speakers, set-top boxes, and portable monitors against user-handling ESD and adapter transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed after input fuse and before primary DC-DC converter to prevent latch-up or gate oxide damage. Use Value: Halogen-free construction supports consumer safety standards; SMC package enables compact, automated assembly in high-volume production. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ48AHE3_A/I | Lower PPPM (400 W), smaller SMA (DO-214AC) package, same VWM/VBR/VC specs. | Reduced surge handling limits use to lower-energy interfaces (e.g., USB data lines, low-current sensors). | Select when board space is constrained and surge threat level is below 1 kV/0.5 kA. |
| SMCJ48AHE3_A/I | Same electrical specs and SMC package, but RoHS-compliant without halogen-free certification (E3 vs HM3). | Acceptable for commercial/industrial use where halogen-free requirement is not mandated (e.g., non-automotive OEMs). | Choose for cost-sensitive designs where AEC-Q101 is unnecessary and halogen content is unrestricted. |
Compared with SMAJ48AHE3_A/I and SMCJ48AHE3_A/I, the SMCJ48AHM3_A/I uniquely combines 1500 W surge capability, AEC-Q101 qualification, and halogen-free compliance-making it the only option qualified for automotive power rail protection where all three attributes are mandatory.
Availability
SMCJ48AHM3_A/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom power feeds, and consumer DC input protection requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMCJ48AHM3_A/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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMCJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in automotive, industrial, and telecom infrastructure where robustness, consistency, and regulatory compliance are non-negotiable.
FAQ
What is the clamping voltage of the SMCJ48AHM3_A/I under a 10/1000 µs surge?
The SMCJ48AHM3_A/I clamps to a maximum of 77.4 V when subjected to its rated 19.4 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and verified under standard test conditions (TA = 25 °C, mounted on 8.0 mm × 8.0 mm copper pads). The clamping voltage directly determines the maximum stress imposed on downstream components during surge events, making it a critical parameter for system-level protection design.
Is the SMCJ48AHM3_A/I qualified for automotive applications?
Yes, the SMCJ48AHM3_A/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" and documentation in datasheet 88394 (Revision 09-Jan-2024). This qualification covers stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD, validating its suitability for under-hood and chassis-mounted automotive systems such as engine control units and ADAS sensor modules.
What does the "HM3" suffix indicate in SMCJ48AHM3_A/I?
The "HM3" suffix in SMCJ48AHM3_A/I denotes halogen-free, RoHS-compliant, and AEC-Q101 qualified construction. Specifically, "H" indicates AEC-Q101 qualification, "M3" confirms halogen-free molding compound and lead finish, and "_A/I" specifies packaging in 13-inch tape-and-reel (3500 units) with revision code "A". This distinguishes it from E3 (RoHS only) and HE3 (AEC-Q101 + RoHS, not halogen-free) variants.
How does the thermal resistance of SMCJ48AHM3_A/I affect its derating?
The SMCJ48AHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W on the recommended 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper pad layout. At ambient temperatures above 25 °C, its peak pulse power must be linearly derated per Figure 2 in datasheet 88394-e.g., at 75 °C TA, maximum PPPM drops to ~1000 W. Proper PCB copper area and airflow are essential to maintain clamping performance under sustained thermal stress.
Can SMCJ48AHM3_A/I be used in bidirectional configurations?
No, the SMCJ48AHM3_A/I is a unidirectional TVS, as indicated by the "A" (not "CA") suffix and presence of a cathode band marking. Bidirectional operation requires the "CA" variant (e.g., SMCJ48CA), which lacks polarity marking and clamps symmetrically in both directions. Using SMCJ48AHM3_A/I in a bidirectional circuit would result in forward conduction during negative transients, potentially damaging the device or failing to protect the system.
SMCJ48AHM3_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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 48V
- Voltage - Breakdown (Min):
- 53.3V
- Voltage - Clamping (Max) @ Ipp:
- 77.4V
- Current - Peak Pulse (10/1000µs):
- 19.4A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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)
SMCJ48AHM3_A/I FAQ
1.How can I place an order for SMCJ48AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ48AHM3_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 SMCJ48AHM3_A/I reliable?
The price and inventory of SMCJ48AHM3_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 SMCJ48AHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMCJ48AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ48AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ48AHM3_A/I?
SMCJ48AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ48AHM3_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 SMCJ48AHM3_A/I?
For technical support, including SMCJ48AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ48AHM3_A/I requirements.
6.How does Aetrix verify that SMCJ48AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMCJ48AHM3_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 SMCJ48AHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMCJ48AHM3_A/I?
All SMCJ48AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ48AHM3_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 SMCJ48AHM3_A/I part is unused and in its original packaging.
Return procedure for SMCJ48AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ48AHM3_A/I Tags
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