My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMCJ48AHM3/H
- Part No.:
- SMCJ48AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ48AHM3/H.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,061
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMCJ48AHM3/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) in SMC (DO-214AB) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 48 V stand-off voltage (VWM), 53.3–58.9 V breakdown voltage (VBR) at 1 mA, 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 in automotive power supply inputs and industrial sensor interfaces.
For engineers reviewing the SMCJ48AHM3/H datasheet, SMCJ48AHM3/H pinout, SMCJ48AHM3/H application, or SMCJ48AHM3/H equivalent, key selection criteria include clamping performance under 19.4 A surge, thermal resistance (RθJA = 75 °C/W), AEC-Q101 qualification status, halogen-free RoHS compliance (HM3 suffix), and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ48AHM3/H operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to achieve sub-nanosecond response time and low incremental surge resistance. Its clamping behavior is defined by a 10/1000 µs double-exponential surge waveform, with VC = 77.4 V measured at IPPM = 19.4 A under standardized mounting conditions.
Thermally, it supports operation from –55 °C to +150 °C junction temperature, with RθJL = 15 °C/W enabling effective heat transfer to PCB leads. The HM3 suffix confirms halogen-free, RoHS-compliant construction and AEC-Q101 qualification - critical for automotive-grade reliability in engine control units and ADAS power domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - maximum continuous reverse operating voltage before significant leakage; defines safe DC rail protection threshold |
| VBR min/max | 53.3 V / 58.9 V at IT = 1 mA - guaranteed avalanche initiation range; ensures consistent turn-on across production lots |
| VC @ IPPM | 77.4 V at 19.4 A - clamped voltage during 10/1000 µs surge; determines protected circuit's maximum transient stress |
| PPPM | 1500 W - peak pulse power handling capability; enables survival of high-energy transients per ISO 7637-2 Pulse 1/2/5a |
| ID @ VWM | 1.0 µA - reverse leakage at stand-off voltage; negligible power loss in always-on protection schemes |
| TJ max | +150 °C - maximum junction temperature; supports under-hood automotive environments without derating |
| RθJA | 75 °C/W - thermal resistance junction-to-ambient on standard pad layout; informs board-level thermal design margin |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, MSL Level 1 (260 °C peak reflow), polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode-side connection point in unidirectional configuration | Connected to protected line (e.g., 48 V rail); clamps to ground when transient exceeds VBR |
| Anode | Reference/ground return path | Typically tied to system ground plane; completes clamping current path during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including powertrain and body electronics per stress test requirements |
| Halogen-free & RoHS-compliant (HM3) | Meets IEC 61249-2-21 and JEDEC J-STD-20D; eliminates brominated flame retardants for safer recycling |
| Low incremental surge resistance | Enables tighter clamping (VC/VBR ratio = 1.37) versus legacy TVS devices, reducing downstream component stress |
| Fast response time (< 1 ns) | Clamps transients before sensitive ICs (e.g., CAN transceivers, MCU I/O) experience latch-up or gate oxide damage |
| MSL Level 1 rating | Allows unlimited floor life and single-reflow processing at 260 °C peak, simplifying SMT manufacturing flow |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 48 V battery-fed ECUs against load dump and alternator ripple transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground to clamp surges above 48 V. Use Value: Withstands 1500 W pulses and maintains VC ≤ 77.4 V, preventing damage to downstream DC/DC converters and microcontrollers. | Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to PLC analog input modules. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional device used across differential signal pairs (e.g., 4–20 mA loop) referenced to common ground. Use Value: Sub-1 ns response ensures clamping occurs before ESD-induced latch-up in op-amp front-ends, preserving measurement integrity. |
| Telecom DC Power Feeds | Motor Drive Gate Driver Protection |
Use Scenario: Shielding PoE-powered equipment (e.g., IP cameras) from induced surges on 48 V DC feed lines. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side DC bus, upstream of DC/DC isolation stage. Use Value: 77.4 V clamping voltage provides ≥10 V margin below typical 85 V DC/DC input absolute maximum ratings. | Use Scenario: Protecting high-side N-channel MOSFET gate drivers from Miller-induced voltage spikes during fast switching. IC Role / Device Role / Timing Role: Clamp placed between gate and source to limit dv/dt-induced overshoot beyond driver IC's VGS rating. Use Value: Low Rsurge and tight VC tolerance ensure gate voltage stays within ±20 V spec even during 100 A motor stall transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ48A-E3/57T | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (110 °C/W) | Not suitable for automotive load dump; limited to low-energy consumer electronics | Select only for space-constrained, non-automotive designs with <500 W surge requirements |
| SMCJ48AHE3_A/H | Same electrical specs, but RoHS-compliant commercial grade (E3) without halogen-free or AEC-Q101 qualification | Lacks automotive qualification; not approved for safety-critical vehicle subsystems | Choose for cost-sensitive industrial controls where AEC-Q101 is not mandated |
Compared with SMAJ48A-E3/57T and SMCJ48AHE3_A/H, the SMCJ48AHM3/H uniquely combines 1500 W surge capacity, AEC-Q101 qualification, and halogen-free construction - making it the only option qualified for under-hood automotive power rail protection with full regulatory compliance.
Availability
SMCJ48AHM3/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom DC power feeds requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ48AHM3/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, TVS, MOSFETs, and optoelectronics with emphasis on reliability and application-specific performance.
The SMCJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments including automotive, industrial, and telecom infrastructure.
FAQ
What is the clamping voltage of SMCJ48AHM3/H at its rated peak pulse current?
The SMCJ48AHM3/H has a maximum clamping voltage (VC) of 77.4 V at its rated peak pulse current (IPPM) of 19.4 A, tested with a 10/1000 µs waveform on standard 8.0 mm × 8.0 mm copper pads. This value defines the upper voltage limit imposed on protected circuits during surge events and is critical for ensuring downstream components remain within their absolute maximum ratings. The SMCJ48AHM3/H achieves this clamping performance while maintaining low incremental surge resistance and sub-nanosecond response.
Is SMCJ48AHM3/H qualified for automotive applications?
Yes, the SMCJ48AHM3/H is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in Vishay's SMCJ5.0A–SMCJ188CA datasheet (Rev. 09-Jan-2024). This qualification covers stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing - validating its suitability for automotive powertrain, body, and ADAS systems. The SMCJ48AHM3/H is explicitly designated for automotive use, unlike commercial-grade variants such as SMCJ48A-E3.
What does the "HM3" suffix indicate for SMCJ48AHM3/H?
The "HM3" suffix in SMCJ48AHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes the part from E3 (RoHS-compliant commercial grade) and HE3 (RoHS + AEC-Q101, but not halogen-free) variants. The HM3 marking ensures compliance with JEDEC J-STD-20D MSL Level 1, JESD 201 Class 2 whisker resistance, and UL 94 V-0 flammability standards - all verified for SMCJ48AHM3/H in Vishay's official documentation.
How does SMCJ48AHM3/H compare to bidirectional SMCJ48CA in terms of application use?
The SMCJ48AHM3/H is unidirectional, intended for DC rail protection where polarity is fixed (e.g., 48 V input to an ECU), while SMCJ48CA is bidirectional and suited for AC or floating signal lines (e.g., RS-485, CAN bus). Although both share identical VWM (48 V) and PPPM (1500 W), the SMCJ48AHM3/H exhibits lower leakage (<1.0 µA) and is optimized for asymmetric surge suppression. Using SMCJ48AHM3/H in place of SMCJ48CA on bidirectional lines would result in forward conduction during negative transients - making them non-interchangeable without circuit redesign.
What is the thermal resistance specification for SMCJ48AHM3/H, and how does it impact PCB layout?
The SMCJ48AHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the minimum recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, per Vishay's datasheet Figure 2. This value directly impacts PCB layout: reducing pad size or omitting thermal vias increases RθJA, risking junction overheating during repetitive surges. For reliable operation at TJ ≤ 150 °C, designers must allocate adequate copper area and consider thermal vias to internal ground planes - especially in high-ambient automotive environments where the SMCJ48AHM3/H is commonly deployed.
SMCJ48AHM3/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:
- Discontinued at Digi-Key
- 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/H FAQ
1.How can I place an order for SMCJ48AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ48AHM3/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 SMCJ48AHM3/H reliable?
The price and inventory of SMCJ48AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ48AHM3/H is usually 5 days.
3.What payment methods are accepted for SMCJ48AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ48AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ48AHM3/H?
SMCJ48AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ48AHM3/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 SMCJ48AHM3/H?
For technical support, including SMCJ48AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ48AHM3/H requirements.
6.How does Aetrix verify that SMCJ48AHM3/H is sourced from the original manufacturer or authorized distributors?
All SMCJ48AHM3/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 SMCJ48AHM3/H meets industry standards.
7.What is the process for return or replacement of SMCJ48AHM3/H?
All SMCJ48AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ48AHM3/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 SMCJ48AHM3/H part is unused and in its original packaging.
Return procedure for SMCJ48AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ48AHM3/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 …
