My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMAJ48AHE3/61
- Part No.:
- SMAJ48AHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ48AHE3/61.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,416
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ48AHE3/61 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power 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 5.2 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the SMAJ48AHE3/61 datasheet, SMAJ48AHE3/61 pinout, SMAJ48AHE3/61 application, or SMAJ48AHE3/61 equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 150 °C max junction temperature, low incremental surge resistance, and compatibility with automated SMT assembly on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a fast-acting shunt protector: under normal conditions it presents high impedance (>1 MΩ leakage at 48 V), but triggers into low-impedance conduction when transient voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance and long-term reliability under repetitive surge stress.
The device complies with ANSI/IEEE C62.35 for transient suppression and meets JESD201 Class 2 whisker resistance, MSL Level 1 per J-STD-020, and UL 497B recognition (QVGQ2). Its thermal resistance (RθJA = 120 °C/W) and 3.3 W steady-state power dissipation support operation up to +150 °C junction temperature without derating on standard PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - maximum continuous reverse operating voltage before significant leakage; defines safe operating margin below clamping threshold |
| VBR min/max | 53.3 V / 58.9 V at IT = 1 mA - tight breakdown window ensures predictable turn-on across temperature and unit variation |
| VC @ IPPM | 77.4 V at 5.2 A - clamping voltage during 10/1000 μs surge; limits downstream voltage stress to protected circuitry |
| PPPM | 400 W - peak pulse power handling capability with standard 10/1000 μs waveform; rated at TA = 25 °C |
| ID @ VWM | 1.0 μA - ultra-low reverse leakage at stand-off voltage, minimizing standby power loss in battery-powered systems |
| TJ max | +150 °C - maximum junction temperature; enables use in under-hood automotive and high-ambient industrial environments |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with cathode band marking; compatible with JEDEC-standard reflow profiles |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads; polarity indicated by cathode band on unidirectional devices. Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for full 400 W rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or common return path; forms current sink during transient clamping |
| Cathode | High-side transient input | Connected to protected line (e.g., 48 V rail or sensor output); carries surge current to ground during overvoltage event |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness - suitable for engine control, body electronics, and ADAS power rails |
| 400 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 48 V systems without degradation when mounted per recommended pad layout |
| Fast response time & low clamping ratio | Sub-nanosecond turn-on and VC/VBR ≈ 1.42 enable effective protection of sensitive 3.3 V/5 V logic interfaces downstream of DC-DC converters |
| MSL Level 1 moisture sensitivity | Zero bake requirement prior to reflow; supports standard SMT assembly without dry-pack or floor-life constraints |
| Glass passivated junction | Stable electrical parameters over lifetime and immunity to humidity-induced parameter drift in harsh industrial enclosures |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: 48 V battery-supplied ECUs exposed to load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional shunt clamp placed between 48 V rail and chassis ground to limit voltage excursions to <80 V. Use Value: Prevents latch-up or gate oxide damage in buck regulators and CAN transceivers during ISO 7637-2 Pulse 5a events. |
Use Scenario: Analog output lines from pressure/temperature sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: Point-of-entry TVS on 0–10 V or 4–20 mA signal lines upstream of ADC inputs. Use Value: Limits induced lightning/ESD transients to <78 V, preserving 16-bit measurement integrity and avoiding system resets. |
| Telecom DC Power Input Protection | Consumer Power Adapter Output Clamping |
|
Use Scenario: -48 V DC feeding base station RF amplifiers and backhaul interfaces. IC Role / Device Role / Timing Role: Reverse-polarity-protected TVS on primary DC input, oriented anode-to-rail for negative supply clamping. Use Value: Absorbs 10/1000 μs surges up to 400 W while maintaining <1 μA leakage at nominal -48 V, minimizing standby drain. |
Use Scenario: Secondary-side 5 V/12 V outputs of wall-mounted AC/DC adapters powering smart home hubs. IC Role / Device Role / Timing Role: Final-stage overvoltage limiter before USB-PD or microcontroller VDD pins. Use Value: Clamps fast-switching noise from synchronous rectifiers to ≤77.4 V, preventing brownout or POR failures in SoCs. |
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-E3/61 | Commercial-grade version; lacks AEC-Q101 qualification and halogen-free certification | Acceptable for non-automotive industrial or consumer designs where automotive reliability is not mandated | Select SMAJ48AHE3/61 when automotive qualification, extended temperature validation, or halogen-free compliance is required |
| SMBJ48AHE3/61 | Same electrical specs but SMB (DO-214AA) package - 25 % larger footprint, 600 W PPPM rating | Better thermal performance on minimal copper; suited for higher-energy surge environments (e.g., outdoor telecom) | Choose SMBJ48AHE3/61 only if board space allows and >400 W surge margin is needed; SMAJ48AHE3/61 optimizes density for space-constrained ECUs |
Compared with SMAJ48A-E3/61, the SMAJ48AHE3/61 adds automotive qualification and halogen-free construction without sacrificing speed or clamping performance; versus SMBJ48AHE3/61, it trades 200 W pulse headroom for 30 % smaller PCB area and identical mounting process compatibility.
Availability
SMAJ48AHE3/61 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor signal conditioning, and telecom DC power input stages requiring stable component supply, AEC-Q101 traceability, and RoHS-compliant manufacturing.
Supply support for SMAJ48AHE3/61 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 SMAJ series was engineered for high-reliability transient suppression in automotive, industrial, and telecom infrastructure - delivering consistent clamping performance across temperature, lifetime, and surge repetition rates.
FAQ
What is the polarity configuration of SMAJ48AHE3/61?
The SMAJ48AHE3/61 is a unidirectional TVS diode, with the cathode identified by a visible band on the SMA (DO-214AC) package body. When installed, the cathode connects to the protected line (e.g., 48 V rail) and the anode to ground - enabling clamping only during positive transients relative to ground. This configuration prevents forward conduction during normal operation while providing precise overvoltage limiting. The SMAJ48AHE3/61 does not conduct in reverse bias until breakdown occurs.
Does SMAJ48AHE3/61 meet automotive qualification standards?
Yes, SMAJ48AHE3/61 is AEC-Q101 qualified, verified per the full stress test suite including HTGB, H3TRB, TC, and ESD. Its "HE3" suffix explicitly denotes RoHS-compliant and AEC-Q101-qualified construction. This makes SMAJ48AHE3/61 suitable for under-hood and cabin applications such as body control modules, ADAS camera power rails, and infotainment system DC inputs - where failure modes must be rigorously excluded per ISO 26262 functional safety requirements.
What is the maximum clamping voltage of SMAJ48AHE3/61 under surge conditions?
The SMAJ48AHE3/61 has a maximum clamping voltage (VC) of 77.4 V at 5.2 A peak pulse current (IPPM), measured with a 10/1000 μs waveform. This value is guaranteed across the full operating temperature range (−55 °C to +150 °C) and represents the upper limit of voltage seen by downstream circuitry during worst-case transient events. Designers use this parameter to verify that protected ICs - such as 80 V-rated MOSFETs or 3.3 V microcontrollers with 85 V absolute maximum ratings - remain within safe operating limits when SMAJ48AHE3/61 is deployed.
Can SMAJ48AHE3/61 be used in bidirectional signal line protection?
No, SMAJ48AHE3/61 is strictly unidirectional and unsuitable for bidirectional signal lines like RS-485 or CAN bus without external circuitry. Bidirectional protection requires symmetrical breakdown in both polarities - provided only by CA-suffixed variants such as SMAJ48CAHE3/61. Using SMAJ48AHE3/61 on a bidirectional line would result in forward conduction during negative transients, potentially damaging the diode or failing to suppress the event. Always match the SMAJ48AHE3/61 polarity to the DC bias direction of the protected net.
What PCB layout guidance applies to SMAJ48AHE3/61 for full 400 W rating?
To achieve the full 400 W peak pulse power rating, SMAJ48AHE3/61 must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in the Vishay datasheet. Smaller pads reduce thermal dissipation and cause premature thermal runaway during surge events. Additionally, short, wide traces to ground planes and avoidance of vias in the main surge current path are critical. The SMAJ48AHE3/61 thermal resistance (RθJA = 120 °C/W) assumes this layout - deviating reduces safe operating energy and may invalidate the 400 W specification.
SMAJ48AHE3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- 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):
- 5.2A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ48AHE3/61 FAQ
1.How can I place an order for SMAJ48AHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ48AHE3/61 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 SMAJ48AHE3/61 reliable?
The price and inventory of SMAJ48AHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ48AHE3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ48AHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ48AHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ48AHE3/61?
SMAJ48AHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ48AHE3/61 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 SMAJ48AHE3/61?
For technical support, including SMAJ48AHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ48AHE3/61 requirements.
6.How does Aetrix verify that SMAJ48AHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ48AHE3/61 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 SMAJ48AHE3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ48AHE3/61?
All SMAJ48AHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ48AHE3/61, 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 SMAJ48AHE3/61 part is unused and in its original packaging.
Return procedure for SMAJ48AHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ48AHE3/61 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 …
