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TPSMA43AHE3_B/H
Vishay General Semiconductor - Diodes Division
TVS DIODE 36.8VWM 59.3VC DO214AC
1991 Pcs New Original In Stock
59.3V Clamp 6.7A Ipp Tvs Diode Surface Mount DO-214AC (SMA)
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TPSMA43AHE3_B/H
Product Overview
1073146
DiGi Electronics Part Number
TPSMA43AHE3_B/H-DGManufacturer
Vishay General Semiconductor - Diodes Division
TPSMA43AHE3_B/H
Description
TVS DIODE 36.8VWM 59.3VC DO214ACInventory
1991 Pcs New Original In Stock
59.3V Clamp 6.7A Ipp Tvs Diode Surface Mount DO-214AC (SMA)
CAD Models - PCB Symbols & Footprints
Quantity
Minimum 1
Minimum 1
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TPSMA43AHE3_B/H Technical Specifications
Category
Transient Voltage Suppressors (TVS), TVS Diodes
Packaging
Tape & Reel (TR)
Series
PAR®
Product Status
Active
Type
Zener
Unidirectional Channels
1
Voltage - Reverse Standoff (Typ)
36.8V
Voltage - Breakdown (Min)
40.9V
Voltage - Clamping (Max) @ Ipp
59.3V
Current - Peak Pulse (10/1000µs)
6.7A
Power - Peak Pulse
400W
Power Line Protection
No
Applications
-
Capacitance @ Frequency
-
Operating Temperature
-65°C ~ 185°C (TJ)
Grade
Automotive
Qualification
AEC-Q101
Mounting Type
Surface Mount
Package / Case
DO-214AC, SMA
Supplier Device Package
DO-214AC (SMA)
Base Product Number
TPSMA43
Datasheet & Documents
HTML Datasheet
TPSMA43AHE3_B/H-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8541.10.0080
Additional Information
Standard Package
1,800
Alternative Parts
PART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
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TPSMA43AHE3_A/H
Vishay General Semiconductor - Diodes Division
4976
TPSMA43AHE3_A/H-DG
0.0534
Direct
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
何かあったときの対応も丁寧で、安心して任せられます。
Dec 02, 2025
Their smart, eco-friendly packaging solutions demonstrate real environmental leadership.
Dec 02, 2025
Their shipping logistics are impressive; items arrive swiftly and in perfect condition.
Dec 02, 2025
I've tested their components in harsh conditions, and they have shown excellent resilience and longevity.
Dec 02, 2025
The prices at DiGi Electronics are unbeatable, and the customer service is top-notch.
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Frequently Asked Questions (FAQ)
What are the key reliability risks when using the TPSMA43AHE3_B/H in an automotive under-hood application, and how does its AEC-Q101 qualification mitigate them?
The TPSMA43AHE3_B/H is rated for -65°C to 185°C junction temperature and qualified to AEC-Q101, making it suitable for harsh automotive environments like under-hood applications. Key risks include thermal cycling stress, moisture ingress, and high transient energy exposure. The AEC-Q101 validation ensures robustness against these through rigorous temperature cycling, HAST (Highly Accelerated Stress Test), and surge testing. To further mitigate risk, ensure proper PCB layout with adequate copper pour for heat dissipation and avoid placing the device near high-vibration zones without mechanical strain relief.
Can I replace a Littelfuse SMAJ36A with the TPSMA43AHE3_B/H in a 48V industrial power rail protection circuit, and what design trade-offs should I consider?
Yes, the TPSMA43AHE3_B/H can replace the SMAJ36A in many 48V systems, but critical differences exist: the TPSMA43AHE3_B/H has a higher reverse standoff voltage (36.8V vs. 36V) and slightly higher clamping voltage (59.3V vs. 58.1V at 6.7A). While both are 400W devices in SMA packages, the TPSMA43AHE3_B/H offers superior automotive-grade reliability (AEC-Q101) and wider temperature range. However, if your system operates near the 36V threshold, the higher standoff voltage provides a safer margin against nuisance triggering. Always validate transient response with actual surge waveforms (e.g., IEC 61000-4-5) to ensure adequate protection.
How does the unidirectional nature of the TPSMA43AHE3_B/H affect its use in AC-coupled or bipolar signal lines, and what alternatives exist if bidirectional clamping is needed?
The TPSMA43AHE3_B/H is a unidirectional TVS diode, meaning it only clamps positive transients effectively and may conduct during negative voltage swings below -0.7V—making it unsuitable for AC-coupled or bipolar signal lines without additional circuitry. For such applications, consider a bidirectional TVS like the Vishay SMBJ36CA or Littelfuse SMAJ36CA, which symmetrically clamp both polarities. If space constraints prevent switching packages, you can pair two TPSMA43AHE3_B/H diodes back-to-back, but this increases parasitic capacitance and cost, potentially affecting high-speed signal integrity.
What PCB layout practices are critical to ensure the TPSMA43AHE3_B/H delivers its rated 400W peak pulse power during an ESD or load dump event?
To achieve the full 400W peak pulse capability of the TPSMA43AHE3_B/H, minimize parasitic inductance by placing the device as close as possible to the protected line connector or entry point. Use short, wide traces (≥20 mil) and avoid vias between the TVS and the protected net. Connect the cathode directly to the high-risk signal/power line and the anode to a low-impedance ground plane with multiple thermal vias if needed. Poor layout can increase effective clamping voltage by 10–20%, reducing protection margin—especially critical during ISO 7637-2 load dump pulses where energy delivery is time-sensitive.
Is the TPSMA43AHE3_B/H suitable for protecting a 3.3V microcontroller I/O pin from indirect lightning surges, and what additional circuitry might be required?
No, the TPSMA43AHE3_B/H is not appropriate for direct protection of 3.3V MCU I/O pins due to its high reverse standoff voltage (36.8V) and clamping voltage (59.3V), which far exceed the MCU’s absolute maximum ratings. However, it can serve as a first-stage protector on the power rail or communication bus (e.g., CAN, RS-485) feeding the MCU. For I/O pin protection, use a low-capacitance, low-voltage TVS array like the Semtech RClamp0524P (5V working, 9.8V clamp). Combine both strategies: place the TPSMA43AHE3_B/H at the system boundary for bulk surge diversion and a precision TVS at the pin for fine-grained protection.
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TPSMA43AHE3_B/H CAD Models
Vishay General Semiconductor - Diodes Division TPSMA43AHE3_B/H PCB symbols & footprints
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