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Vishay General Semiconductor - Diodes Division SMCJ48CAHM3_A/H
- Part No.:
- SMCJ48CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ48CAHM3_A/H.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,795
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Product details
Overview
SMCJ48CAHM3_A/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection. It features 48 V standoff voltage (VWM), 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 - deployed to safeguard MOSFETs, ICs, and sensor signal lines against inductive switching transients in automotive and industrial power systems.
For engineers reviewing the SMCJ48CAHM3_A/H datasheet, SMCJ48CAHM3_A/H pinout, SMCJ48CAHM3_A/H application, or SMCJ48CAHM3_A/H equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification status, halogen-free RoHS compliance, thermal resistance (RθJA = 75 °C/W), and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under transient overvoltage exceeding its breakdown range (53.3–58.9 V at 1 mA), it avalanches rapidly (<1 ns response) to divert surge current away from downstream circuitry. Its bidirectional structure ensures symmetrical clamping in AC-coupled or floating signal paths without polarity dependency.
Designed for rugged environments, SMCJ48CAHM3_A/H meets MSL level 1 per J-STD-020 (peak reflow 260 °C), supports 200 A non-repetitive forward surge (IFSM), and maintains stable operation across -55 °C to +150 °C junction temperature range - enabled by glass-passivated silicon junction and matte tin-plated leads compliant with J-STD-002 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - maximum continuous reverse operating voltage before clamping initiates; defines safe working margin for protected circuitry |
| VBR min/max | 53.3 V / 58.9 V at 1 mA - guaranteed avalanche onset window; ensures predictable turn-on across production lot |
| VC @ IPPM | 77.4 V at 19.4 A - clamping voltage during full 1500 W surge; determines worst-case stress on downstream components |
| PPPM | 1500 W - peak pulse power handling with 10/1000 μs waveform; validates robustness against IEC 61000-4-5 Level 4 surges |
| RθJA | 75 °C/W - junction-to-ambient thermal resistance on standard 8.0 mm × 8.0 mm pads; informs derating above 25 °C ambient |
| TJ max | +150 °C - maximum junction temperature; enables use in under-hood automotive and high-temperature industrial enclosures |
| AEC-Q101 | Qualified - certified for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads; dimensions 7.11 mm × 6.22 mm × 2.62 mm (L × W × H); UL 94 V-0 rated molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; common node for bidirectional conduction path | Connected to lower-potential side of protected line; forms symmetrical clamp with cathode during either polarity surge |
| Cathode | Current exit terminal in forward bias; common node for bidirectional conduction path | Connected to higher-potential side of protected line; enables clamping action regardless of transient polarity |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Electrical symmetry in both polarities eliminates need for polarity-aware layout; ideal for AC signal lines and floating buses |
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS sensor interfaces requiring extended temperature and life-cycle reliability |
| Halogen-free & RoHS-compliant | HM3 suffix confirms halogen-free molding compound and lead finish - meets EU ELV and JEDEC JS709C environmental requirements |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a/5a), improving protection margin |
| MSL Level 1 rating | Supports single-reflow assembly at 260 °C peak without moisture-induced damage; eliminates bake-out requirement |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Protection |
|---|---|
Use Scenario: Protecting 48 V battery-fed ECUs and body control modules from load dump and alternator ripple. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed across power rail input prior to DC/DC converter. Use Value: Clamps 120 V/200 ms load dump events to ≤77.4 V, preventing overvoltage failure of downstream regulators and microcontrollers. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Bidirectional clamp on 0–10 V or 4–20 mA signal lines exposed to relay coil flyback and ESD. Use Value: Limits transient excursions to <80 V while maintaining <1 μA leakage at 48 V, preserving signal integrity and measurement accuracy. |
| Telecom DC Power Feeds | Motor Drive Gate Driver Protection |
Use Scenario: Securing -48 V telecom rectifier outputs against lightning-induced surges on central office distribution lines. IC Role / Device Role / Timing Role: Primary-level TVS on DC input bus upstream of hot-swap controllers and backup batteries. Use Value: Absorbs 1500 W surges with <1 ns response, meeting ITU-T K.20 and Telcordia GR-1089-CORE immunity requirements. |
Use Scenario: Shielding isolated gate drivers in 3-phase inverters from Miller-induced shoot-through during IGBT/MOSFET switching. IC Role / Device Role / Timing Role: Clamp across gate-source terminals to suppress dv/dt-induced false turn-on. Use Value: Provides sub-100 V clamping at 19.4 A with minimal capacitance, avoiding gate oscillation while enabling fast switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ48CA-E3/57T | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (110 °C/W) | Restricted to lower-energy transients and space-constrained consumer PCBs; not AEC-Q101 qualified | Select when board area is critical and surge energy remains below 400 W; verify thermal margin at elevated ambient |
| SMCJ48CAHE3_A/H | Same electrical specs and package, but RoHS-compliant commercial grade (E3) without halogen-free compound or AEC-Q101 certification | Suitable for non-automotive industrial and computing applications where halogen-free and automotive qualification are not mandated | Choose for cost-sensitive commercial designs where AEC-Q101 and halogen-free are not required |
Compared with SMCJ48CAHM3_A/H, SMAJ48CA-E3/57T offers reduced footprint at the expense of surge capacity and thermal performance, while SMCJ48CAHE3_A/H provides identical protection with relaxed material and qualification requirements - enabling trade-offs between automotive compliance, environmental compliance, and cost.
Availability
SMCJ48CAHM3_A/H is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, telecom DC feed protection, and motor drive gate driver safeguarding requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ48CAHM3_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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on high-reliability and automotive-grade solutions.
The SMCJ series is engineered for high-power transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where robustness, AEC-Q101 validation, and precise clamping performance are mandatory.
FAQ
What does the "HM3" suffix indicate in SMCJ48CAHM3_A/H?
The HM3 suffix in SMCJ48CAHM3_A/H denotes halogen-free, RoHS-compliant construction and AEC-Q101 qualification. It confirms compliance with JEDEC JS709C for halogen content, adherence to EU RoHS Directive 2011/65/EU, and successful completion of automotive reliability stress tests including temperature cycling and HTRB - distinguishing it from commercial-grade E3 or M3 variants.
How does SMCJ48CAHM3_A/H differ from unidirectional SMCJ48A variants?
SMCJ48CAHM3_A/H is bidirectional, providing symmetrical clamping for both positive and negative transients - essential for AC-coupled, floating, or differential signal lines. In contrast, unidirectional SMCJ48A has a defined cathode band and only clamps in reverse bias; using it in bidirectional applications risks forward conduction and failure. The "CA" suffix explicitly enables dual-polarity protection without polarity awareness.
What is the minimum recommended PCB pad layout for SMCJ48CAHM3_A/H?
The minimum recommended PCB pad layout for SMCJ48CAHM3_A/H is 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, as specified in the Vishay datasheet for thermal and surge-current derating. This layout ensures the rated 1500 W peak pulse power and 75 °C/W thermal resistance are achieved; smaller pads will increase junction temperature and reduce surge capability, especially above 25 °C ambient.
Can SMCJ48CAHM3_A/H be used in place of SMCJ48CAHE3_A/H?
Yes, SMCJ48CAHM3_A/H can replace SMCJ48CAHE3_A/H in most designs because both share identical electrical characteristics, package, and pinout. However, SMCJ48CAHM3_A/H adds halogen-free material compliance and AEC-Q101 qualification - making it suitable for automotive and environmentally regulated applications where the HE3 variant is insufficient. No PCB or schematic changes are needed for substitution.
What is the clamping voltage behavior of SMCJ48CAHM3_A/H under repeated surges?
SMCJ48CAHM3_A/H maintains stable clamping voltage (VC = 77.4 V at 19.4 A) under single-event 10/1000 μs surges. For repetitive surges, derating per Figure 2 in the Vishay datasheet applies: clamping performance degrades as junction temperature rises, requiring reduction of IPPM if duty cycle exceeds 0.01% or ambient exceeds 25 °C. Continuous operation demands thermal design to hold TJ ≤ 150 °C.
SMCJ48CAHM3_A/H 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):
- 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)
SMCJ48CAHM3_A/H FAQ
1.How can I place an order for SMCJ48CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ48CAHM3_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 SMCJ48CAHM3_A/H reliable?
The price and inventory of SMCJ48CAHM3_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 SMCJ48CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMCJ48CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ48CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ48CAHM3_A/H?
SMCJ48CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ48CAHM3_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 SMCJ48CAHM3_A/H?
For technical support, including SMCJ48CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ48CAHM3_A/H requirements.
6.How does Aetrix verify that SMCJ48CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ48CAHM3_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 SMCJ48CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ48CAHM3_A/H?
All SMCJ48CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ48CAHM3_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 SMCJ48CAHM3_A/H part is unused and in its original packaging.
Return procedure for SMCJ48CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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