My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMAJ43CAHE3_A/H
- Part No.:
- SMAJ43CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ43CAHE3_A/H.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,990
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ43CAHE3_A/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal or power lines. It features 43 V standoff voltage (VWM), 69.4 V maximum clamping voltage at 5.8 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - deployed in automotive sensor interfaces, industrial I/O protection, and telecom line surge suppression.
For engineers reviewing the SMAJ43CAHE3_A/H datasheet, SMAJ43CAHE3_A/H pinout, SMAJ43CAHE3_A/H application, or SMAJ43CAHE3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low thermal resistance (RθJL = 30 °C/W), and compatibility with automated SMT assembly on standard PCB pad layouts.
Technical Context
This device operates as a voltage-clamping protector: during transient overvoltage events exceeding its reverse standoff voltage (VWM = 43 V), it avalanches to limit the voltage across protected circuitry to ≤69.4 V. Its bidirectional symmetry enables use without polarity consideration on AC-coupled or differential lines.
Constructed with glass-passivated junction and rated for TJ = −55 °C to +150 °C, SMAJ43CAHE3_A/H delivers repeatable surge handling under 0.01% duty cycle conditions. It meets MSL Level 1 per J-STD-020 and supports lead-free reflow up to 260 °C peak temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 43 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR (Breakdown Voltage) | 47.8–52.8 V at 1 mA - Confirmed avalanche onset range under DC test conditions |
| VC (Clamping Voltage) | 69.4 V at IPPM = 5.8 A (10/1000 μs) - Peak voltage seen by protected circuit during worst-case surge |
| PPPM (Peak Pulse Power) | 400 W - Sustained transient energy absorption capacity under standardized waveform |
| ID (Reverse Leakage) | 1.0 μA max at VWM - Negligible standby current draw in normal operation |
| RθJL (Junction-to-Lead) | 30 °C/W - Enables effective heat transfer to PCB copper pads during repetitive surges |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H); terminals are matte tin-plated for J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (reverse bias) | One terminal of symmetrical PN junction - conducts during positive or negative overvoltage excursion |
| Cathode | Transient current exit (reverse bias) | Second terminal of symmetrical PN junction - completes low-impedance path to ground or rail during clamping |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC, differential, or floating signal lines without polarity constraints |
| 400 W peak pulse power (10/1000 μs) | Handles high-energy transients common in automotive load-dump or industrial relay switching |
| AEC-Q101 qualification | Validated for automotive electronics including engine control modules and ADAS sensor interfaces |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking - reduces manufacturing overhead |
| Glass-passivated chip junction | Ensures stable breakdown characteristics and long-term reliability under thermal cycling stress |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from ISO 7637-2 pulse 1/2a/5a transients. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector or IC input pins to shunt surge current before reaching sensitive front-end circuitry. Use Value: Limits voltage to ≤69.4 V during 5.8 A surge, preserving signal integrity and preventing latch-up in 3.3 V/5 V interface ICs. |
Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers against inductive kickback from solenoids and contactors. IC Role / Device Role / Timing Role: Primary overvoltage clamp on field-side signal lines, mounted adjacent to terminal block for shortest possible surge path. Use Value: Withstands 400 W pulses while maintaining <1.0 μA leakage at 43 V - avoids false triggering and ensures stable logic thresholds. |
| Telecom Line Interface | Consumer USB/Display Port ESD |
Use Scenario: Secondary protection on Ethernet PHY magnetics or xDSL line drivers exposed to lightning-induced surges per ITU-T K.20/K.21. IC Role / Device Role / Timing Role: Coordinated clamping stage downstream of gas discharge tube (GDT), absorbing residual energy after primary diversion. Use Value: Fast response (<1 ns) and low clamping ratio (VC/VWM ≈ 1.61) minimize overshoot into PHY ICs rated for ≤70 V absolute maximum. |
Use Scenario: Board-level ESD and surge protection for HDMI, USB 2.0, or DisplayPort connectors in set-top boxes and monitors. IC Role / Device Role / Timing Role: Low-capacitance TVS (CJ ≈ 100 pF typical at VWM) placed between connector and controller IC to suppress ±8 kV contact ESD per IEC 61000-4-2. Use Value: Maintains signal fidelity up to 480 Mbps (USB 2.0) due to controlled capacitance and sub-100 ps response time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43CA-M3 | Halogen-free, RoHS-compliant, same electrical specs and AEC-Q101 qualification; differs only in material composition (HM3 vs HE3 suffix) | Identical functional use in automotive and industrial environments; preferred where halogen-free compliance is mandated | Select SMAJ43CA-M3 when halogen-free materials are required by OEM specification or regional environmental regulation. |
| SMBJ43CAHE3_A/H | Same VWM (43 V) and VC (69.4 V), but SMB (DO-214AA) package - larger footprint (5.28 mm × 4.50 mm), higher PPPM (600 W), RθJA = 85 °C/W | Better thermal performance and surge margin; requires larger PCB area and different pad layout | Choose SMBJ43CAHE3_A/H when higher surge endurance (>400 W) or improved thermal dissipation is needed and board space permits. |
Compared with SMAJ43CAHE3_A/H, SMAJ43CA-M3 offers identical protection performance with halogen-free construction, while SMBJ43CAHE3_A/H trades compact size for greater power handling and lower thermal resistance - enabling longer surge duration tolerance in thermally constrained designs.
Availability
SMAJ43CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, and telecom line surge suppression requiring stable component supply, AEC-Q101 traceability, and consistent DO-214AC packaging.
Supply support for SMAJ43CAHE3_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 reliability, power efficiency, and automotive-grade validation.
The SMAJ series targets cost-sensitive, high-volume transient protection applications where robustness, SMT compatibility, and AEC-Q101 compliance are mandatory - especially in vehicle electrification and industrial automation systems.
FAQ
What is the clamping voltage of SMAJ43CAHE3_A/H at its rated peak pulse current?
The SMAJ43CAHE3_A/H has a maximum clamping voltage (VC) of 69.4 V when subjected to its specified peak pulse current (IPPM) of 5.8 A using the 10/1000 μs waveform. This value is measured under standardized test conditions per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream ICs remain within their absolute maximum ratings.
Is SMAJ43CAHE3_A/H suitable for automotive applications?
Yes, SMAJ43CAHE3_A/H is AEC-Q101 qualified and explicitly designated for automotive use via its "HE3" suffix. It undergoes rigorous stress testing including temperature cycling, highly accelerated life testing (HALT), and ESD verification. Its bidirectional architecture, 43 V standoff, and 69.4 V clamping make it appropriate for protecting CAN transceivers, LIN buses, and sensor signal paths in passenger vehicles and commercial fleets.
How does the SMAJ43CAHE3_A/H differ from unidirectional variants like SMAJ43AHE3_A/H?
SMAJ43CAHE3_A/H is bidirectional, meaning it clamps voltage transients of either polarity symmetrically - ideal for AC-coupled or differential lines. In contrast, SMAJ43AHE3_A/H is unidirectional with a cathode band marking and conducts only in reverse bias; forward conduction is limited to 3.5 V at 25 A. The "CA" suffix confirms dual-direction functionality, while both share identical VWM (43 V), VC (69.4 V), and PPPM (400 W).
What is the thermal resistance from junction to ambient for SMAJ43CAHE3_A/H?
The typical junction-to-ambient thermal resistance (RθJA) of SMAJ43CAHE3_A/H is 120 °C/W when mounted on the minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes still air and standard JEDEC test conditions. For thermal design, engineers should also consider RθJL = 30 °C/W (junction-to-lead), which better reflects heat transfer into PCB copper when layout allows direct thermal coupling.
Does SMAJ43CAHE3_A/H require polarity-aware PCB layout?
No, SMAJ43CAHE3_A/H does not require polarity-aware PCB layout because it is a bidirectional TVS diode - its internal structure consists of two opposing avalanche junctions, enabling symmetrical clamping for both positive and negative transients. Unlike unidirectional variants (e.g., SMAJ43A), it carries no cathode band marking and may be placed in either orientation on the board without affecting protection performance.
SMAJ43CAHE3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 69.4V
- Current - Peak Pulse (10/1000µs):
- 5.8A
- 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)
SMAJ43CAHE3_A/H FAQ
1.How can I place an order for SMAJ43CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ43CAHE3_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 SMAJ43CAHE3_A/H reliable?
The price and inventory of SMAJ43CAHE3_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 SMAJ43CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMAJ43CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ43CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ43CAHE3_A/H?
SMAJ43CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ43CAHE3_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 SMAJ43CAHE3_A/H?
For technical support, including SMAJ43CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ43CAHE3_A/H requirements.
6.How does Aetrix verify that SMAJ43CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMAJ43CAHE3_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 SMAJ43CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMAJ43CAHE3_A/H?
All SMAJ43CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ43CAHE3_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 SMAJ43CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMAJ43CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ43CAHE3_A/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 …
