My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBJ48CAHM3/H
- Part No.:
- SMBJ48CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ48CAHM3/H.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,859
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ48CAHM3/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal or power lines. It features 48 V standoff voltage (VWM), 53.3–58.9 V breakdown range (VBR), 77.4 V maximum clamping voltage (VC) at 7.8 A peak pulse current (IPPM), and 600 W peak pulse power (PPPM) with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies and telecom line cards.
For engineers reviewing the SMBJ48CAHM3/H datasheet, SMBJ48CAHM3/H pinout, SMBJ48CAHM3/H application, or SMBJ48CAHM3/H equivalent, this device is evaluated for ESD and lightning surge protection in bidirectional AC-coupled lines, reverse polarity tolerant circuits, and automotive-grade (AEC-Q101 qualified) embedded systems requiring halogen-free, RoHS-compliant components.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR min/max (53.3 V / 58.9 V), VC (77.4 V), and IPPM (7.8 A) in either direction. Its low incremental surge resistance and sub-nanosecond response time enable effective suppression of fast-rising transients induced by inductive switching or EFT events.
The device is rated for TJ = –55 °C to +150 °C, meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), and uses glass-passivated junction construction for stable leakage performance (<1.0 µA at VWM). Its halogen-free, RoHS-compliant HM3 suffix confirms compliance with JESD201 Class 2 whisker resistance and UL 94 V-0 molding compound.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC RMS working limit. |
| VBR (min/max) | 53.3 V / 58.9 V - Breakdown occurs within this band at 1 mA test current; ensures predictable turn-on across production lot. |
| VC @ IPPM | 77.4 V at 7.8 A - Clamped voltage during 10/1000 µs surge; determines protected circuit's maximum transient exposure. |
| PPPM | 600 W - Peak pulse power handling capability; validates robustness against IEC 61000-4-5 Level 3/4 surges. |
| ID @ VWM | <1.0 µA - Reverse leakage at standoff voltage; critical for low-power sensor biasing and battery-backed circuits. |
| TJ max. | +150 °C - Maximum junction temperature; supports operation in enclosed industrial enclosures without forced cooling. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height; compatible with automated pick-and-place. |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration - no polarity marking; symmetrical anode/cathode terminals. Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal per Vishay specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity; no fixed polarity assignment. |
| Terminal 2 | Anode / Cathode (bidirectional) | Paired terminal completing symmetrical clamping path; enables protection on AC or floating differential lines. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection on AC signal lines, RS-485 buses, or transformer-coupled interfaces without polarity concerns. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 4 kV surge (line-earth) and 2 kV (line-line) without degradation when properly mounted. |
| AEC-Q101 qualified | Validated for automotive powertrain and body electronics where reliability under thermal cycling and vibration is mandatory. |
| Halogen-free & RoHS-compliant (HM3) | Fulfills IPC-1752a material declaration requirements and supports environmentally regulated OEM programs. |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow profile (peak 260 °C), eliminating bake-out steps in high-volume SMT assembly. |
Applications
| Industrial Power Supply Input Protection | Automotive Body Control Module (BCM) CAN Bus |
|---|---|
|
Use Scenario: 24 V DC input stage of programmable logic controller (PLC) power supply exposed to load dump and inductive kickback. IC Role / Device Role / Timing Role: Bidirectional TVS placed across input rails to clamp transients before they reach upstream DC/DC converter and MCU. Use Value: Limits rail voltage to ≤77.4 V during 7.8 A surge, preventing overvoltage damage to 36 V-rated input capacitors and controller ICs. |
Use Scenario: CAN_H/CAN_L differential pair in BCM exposed to ESD and coupled noise from adjacent high-current solenoid drivers. IC Role / Device Role / Timing Role: SMBJ48CAHM3/H mounted across CAN bus lines to suppress common-mode transients while preserving signal integrity. Use Value: Sub-ns response ensures clamping before CAN transceiver input stages are overstressed; low capacitance avoids data rate degradation at 500 kbps. |
| Telecom Line Card Surge Protection | Consumer Appliance Motor Drive Interface |
|
Use Scenario: Low-voltage auxiliary power rail (e.g., 48 V phantom power) on VoIP gateway line card subject to lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional TVS deployed at board edge to shunt surge energy before it propagates into isolated DC/DC and PHY ICs. Use Value: 600 W rating handles multi-kV surges per ITU-T K.20/K.21; VWM = 48 V matches nominal rail, minimizing standby leakage. |
Use Scenario: H-bridge gate drive signal lines in smart washing machine control board, susceptible to cross-talk and back-EMF coupling. IC Role / Device Role / Timing Role: SMBJ48CAHM3/H placed across each half-bridge control input to clamp coupled transients from motor commutation. Use Value: Symmetric clamping prevents false turn-on of MOSFETs during negative-going spikes; halogen-free HM3 supports global appliance certifications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ48CAHE3/H | Same electrical specs, but RoHS-compliant (non-halogen-free) E3 termination; no JESD201 Class 2 whisker testing. | Suitable for commercial-grade industrial equipment where halogen-free requirement is not mandated. | Select SMBJ48CAHE3/H if environmental compliance only requires RoHS, not halogen-free or automotive qualification. |
| SMAJ48CAHM3 | Lower PPPM (400 W vs. 600 W); same VWM/VBR/VC; SMA package (smaller footprint, higher thermal resistance). | Limited to lower-energy transients; less suitable for IEC 61000-4-5 Level 4 or automotive load dump. | Choose SMAJ48CAHM3 only when board space is constrained and surge threat level is below 400 W. |
Compared with SMBJ48CAHE3/H and SMAJ48CAHM3, SMBJ48CAHM3/H uniquely combines 600 W surge capability, AEC-Q101 qualification, and halogen-free construction - making it the preferred choice for automotive and high-reliability industrial designs where all three attributes are required.
Availability
SMBJ48CAHM3/H is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, telecom line cards, and consumer appliance motor controls requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ48CAHM3/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 reliability, power efficiency, and application-specific validation.
The SMBJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where robustness against ESD, EFT, and surge events is non-negotiable.
FAQ
What does the "CA" suffix indicate in SMBJ48CAHM3/H?
The "CA" suffix denotes a bidirectional configuration - meaning SMBJ48CAHM3/H provides symmetrical clamping for both positive and negative voltage transients. Unlike unidirectional variants (e.g., SMBJ48AHM3/H), it has no cathode marking and functions identically regardless of polarity applied across its terminals, making it ideal for AC-coupled or floating signal lines.
Is SMBJ48CAHM3/H qualified for automotive applications?
Yes, SMBJ48CAHM3/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code structure (HM3 suffix with "_H" reel packaging). This qualification covers stress tests including temperature cycling, mechanical shock, and high-temperature operating life - validating its use in automotive body electronics, infotainment power rails, and CAN/LIN bus protection where reliability under extended thermal and vibration profiles is required.
What is the maximum clamping voltage of SMBJ48CAHM3/H and at what current is it specified?
The maximum clamping voltage (VC) of SMBJ48CAHM3/H is 77.4 V, measured at a peak pulse current (IPPM) of 7.8 A using the standardized 10/1000 µs double-exponential waveform. This value represents the worst-case voltage seen by downstream circuitry during a surge event and is critical for ensuring protected components remain within their absolute maximum ratings.
How does the HM3 suffix differ from E3 or HE3 in SMBJ48CAHM3/H?
The HM3 suffix in SMBJ48CAHM3/H indicates halogen-free, RoHS-compliant construction with JESD201 Class 2 whisker resistance - exceeding baseline RoHS (E3) and adding material safety for high-reliability applications. Unlike HE3 (AEC-Q101 + RoHS), HM3 adds halogen-free compliance, making SMBJ48CAHM3/H suitable for automotive and industrial programs with strict material declarations (e.g., IPC-1752a).
Can SMBJ48CAHM3/H be used in place of a unidirectional TVS like SMBJ48AHM3/H?
No - SMBJ48CAHM3/H is bidirectional and lacks polarity marking, while SMBJ48AHM3/H is unidirectional with a defined cathode band. Substituting SMBJ48CAHM3/H for SMBJ48AHM3/H in DC-biased circuits may cause unintended conduction or failed protection. Use SMBJ48CAHM3/H only where bidirectional clamping is explicitly required, such as AC signal paths or floating differential buses.
SMBJ48CAHM3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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):
- 7.8A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMB)
SMBJ48CAHM3/H FAQ
1.How can I place an order for SMBJ48CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ48CAHM3/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 SMBJ48CAHM3/H reliable?
The price and inventory of SMBJ48CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ48CAHM3/H is usually 5 days.
3.What payment methods are accepted for SMBJ48CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ48CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ48CAHM3/H?
SMBJ48CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ48CAHM3/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 SMBJ48CAHM3/H?
For technical support, including SMBJ48CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ48CAHM3/H requirements.
6.How does Aetrix verify that SMBJ48CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMBJ48CAHM3/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 SMBJ48CAHM3/H meets industry standards.
7.What is the process for return or replacement of SMBJ48CAHM3/H?
All SMBJ48CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ48CAHM3/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 SMBJ48CAHM3/H part is unused and in its original packaging.
Return procedure for SMBJ48CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ48CAHM3/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 …
