My Inquiry
My Account
Vishay General Semiconductor - Diodes Division TPSMA30AHE3_B/I
- Part No.:
- TPSMA30AHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA30AHE3_B/I.pdf
- Description:
- TVS DIODE 25.6VWM 41.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,498
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPSMA30AHE3_B/I 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 30 V nominal breakdown voltage (VBR), 400 W peak pulse power (10/1000 µs), 41.4 V maximum clamping voltage at 9.7 A surge current, 1.0 W steady-state power dissipation, and operates up to +185 °C junction temperature - ideal for automotive ECU power rail protection.
For engineers reviewing the TPSMA30AHE3_B/I datasheet, TPSMA30AHE3_B/I pinout, TPSMA30AHE3_B/I application, or TPSMA30AHE3_B/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, MSL Level 1 solderability, and verified clamping performance under 10/1000 µs surge conditions per IEC 61000-4-5.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to achieve stable breakdown behavior and low incremental surge resistance. Its 185 °C maximum junction temperature rating supports operation in high-temperature automotive under-hood environments without derating penalties beyond those defined in Fig. 2 of the datasheet.
The device responds to transients in sub-nanosecond timeframes and clamps with minimal overshoot due to optimized junction capacitance (<100 pF at 0 V, typical) and low dynamic impedance. It is rated for repetitive 0.01% duty cycle surges and meets JESD22-B102 whisker resistance Class 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 28.5 V / 30.0 V / 31.5 V - defines precise voltage threshold at which avalanche conduction begins under 1 mA test current |
| VWM | 25.6 V - maximum continuous reverse working voltage before leakage exceeds 1 µA at 25 °C |
| VC @ IPPM | 41.4 V at 9.7 A - clamping voltage during 400 W 10/1000 µs surge, directly limiting downstream IC stress |
| PPPM | 400 W - peak pulse power handling capability per standard 10/1000 µs waveform, validated on 5 mm × 5 mm PCB copper pads |
| TJ max. | +185 °C - enables use in engine control modules and ADAS ECUs without thermal derating below ambient 125 °C |
| Polarity | Unidirectional - protects only against positive-going transients relative to cathode; requires correct orientation in series with protected line |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 0.208" length, compatible with automated pick-and-place and reflow profiles up to 260 °C peak |
Pinout & Package
Package: SMA (DO-214AC), molded epoxy case with matte tin-plated leads, UL 94 V-0 rated, cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when VLINE exceeds VBR |
| Anode | Reference node | Typically tied to system ground or lower-potential rail; completes avalanche path during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HAST, and mechanical shock per AEC specification |
| Junction passivation | Reduces surface leakage and improves long-term stability of VBR under humidity and bias stress |
| MSL Level 1 | Zero floor life limitation; can be stored indefinitely and processed using standard reflow without baking |
| Low incremental surge resistance | Ensures predictable clamping voltage across full IPPM range, minimizing voltage overshoot during fast transients |
| 185 °C TJ rating | Supports placement near heat sources (e.g., power MOSFETs, DC-DC inductors) without thermal shutdown or parameter drift |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Digital Input Module |
|---|---|
Use Scenario: Protects 12 V supply rail in engine control units from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between battery input and LDO regulator input. Use Value: Clamps 12 V rail to ≤41.4 V during ISO 7637-2 Pulse 5a (load dump), preventing damage to downstream 3.3 V microcontrollers and CAN transceivers. | Use Scenario: Shields 24 V digital input channels in programmable logic controllers from field-wiring induced surges. IC Role / Device Role / Timing Role: Standoff protection device mounted at connector entry point before optocoupler input stage. Use Value: Limits transient energy to <100 mJ per event, preserving optocoupler CTR and enabling >100,000 surge cycles per channel. |
| Telecom Power Supply Front-End | Consumer Appliance Motor Drive Board |
Use Scenario: Guards AC/DC adapter primary-side bias rails against lightning-induced surges on telecom infrastructure equipment. IC Role / Device Role / Timing Role: Secondary-side TVS on auxiliary 5 V bias rail feeding PWM controller and gate drivers. Use Value: Maintains regulation integrity during IEC 61000-4-5 2 kV line-to-earth surges by clamping within 1 ns and dissipating 400 W peak without failure. | Use Scenario: Safeguards BLDC motor driver gate drive signals from commutation-induced shoot-through spikes. IC Role / Device Role / Timing Role: Localized TVS on half-bridge high-side gate trace, referenced to source node. Use Value: Prevents false turn-on of high-side MOSFET by clamping gate-source voltage to <15 V during 50 ns dV/dt events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30A | Same VBR (28.5–31.5 V), identical SMA package, but rated for 400 W with 8.3 ms sine-wave (not 10/1000 µs); lower clamping voltage (40.5 V) | Not AEC-Q101 qualified; intended for industrial/commercial use only | Select SMAJ30A only if automotive qualification is not required and surge testing follows IEC 61000-4-4 (EFT), not IEC 61000-4-5 |
| 1.5SMC33A | Higher VBR (31.4–34.7 V), same 400 W rating, larger SMC (DO-214AB) package; clamps at 45.7 V | Physically incompatible with SMA footprint; requires PCB redesign | Choose 1.5SMC33A only when higher standoff voltage (30.8 V) is needed and board space allows SMC mounting |
Compared with SMAJ30A and 1.5SMC33A, the TPSMA30AHE3_B/I provides AEC-Q101 validation, tighter VBR tolerance (±5%), and guaranteed 10/1000 µs waveform compliance - making it the sole option for production automotive designs requiring zero layout change and full qualification traceability.
Availability
TPSMA30AHE3_B/I is available at Aetrix Electronics and suitable for automotive ECU protection, industrial PLC input conditioning, and telecom power supply front-end hardening requiring stable component supply, full RoHS compliance, and AEC-Q101 documentation.
Supply support for TPSMA30AHE3_B/I 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 devices, and optoelectronics with emphasis on reliability, thermal performance, and automotive qualification.
The TPSMAxxA family was engineered specifically for high-temperature, high-reliability transient suppression in automotive and industrial systems - delivering consistent clamping behavior across -65 °C to +185 °C and meeting stringent AEC-Q101 stress test requirements.
FAQ
What is the maximum clamping voltage of the TPSMA30AHE3_B/I under a 10/1000 µs surge?
The TPSMA30AHE3_B/I has a maximum clamping voltage (VC) of 41.4 V when subjected to its rated peak pulse current of 9.7 A under the standardized 10/1000 µs waveform. This value is measured per Figure 3 in the Vishay datasheet 88405 and reflects worst-case clamping performance at TA = 25 °C on specified PCB pad layout. The TPSMA30AHE3_B/I maintains this clamping level across its full operating temperature range with predictable derating above 25 °C.
Is the TPSMA30AHE3_B/I AEC-Q101 qualified?
Yes, the TPSMA30AHE3_B/I is AEC-Q101 qualified. As confirmed in the Vishay datasheet 88405, the HE3 suffix denotes RoHS-compliant and AEC-Q101 qualified construction. Qualification includes temperature cycling, highly accelerated stress test (HAST), and mechanical shock testing per AEC-Q101 Rev D. The TPSMA30AHE3_B/I carries full test reports and is approved for use in automotive powertrain and chassis applications.
What does the "HE3_B/I" suffix mean in TPSMA30AHE3_B/I?
The "HE3" suffix indicates RoHS-compliant, AEC-Q101 qualified construction with matte tin plating and JESD201 Class 2 whisker resistance. "B" denotes revision level B of the base device, and "I" specifies packaging in 13-inch plastic tape and reel with 7500 units per reel. This differs from "H" packaging (7-inch reel, 1800 units). The TPSMA30AHE3_B/I is fully traceable and conforms to Vishay's material categorization per doc# 99912.
Can the TPSMA30AHE3_B/I be used in bidirectional configurations?
No, the TPSMA30AHE3_B/I is unidirectional only, as explicitly stated in the Vishay datasheet. It conducts surge current only when the cathode is more positive than the anode. For bidirectional protection, two TPSMA30AHE3_B/I devices must be connected in series opposition, or a dedicated bidirectional TVS such as the TPSMA30CA should be selected. Using the TPSMA30AHE3_B/I in reverse orientation will not provide clamping.
What is the thermal resistance junction-to-ambient (RθJA) for the TPSMA30AHE3_B/I?
The Vishay datasheet 88405 does not specify RθJA for the TPSMA30AHE3_B/I as a standalone parameter. Instead, thermal performance is characterized via derating curves (Figure 2) showing pulse power vs. initial junction temperature. For PCB layout design, the datasheet mandates use of 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated 400 W performance. The TPSMA30AHE3_B/I achieves 185 °C maximum junction temperature under these conditions.
TPSMA30AHE3_B/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 25.6V
- Voltage - Breakdown (Min):
- 28.5V
- Voltage - Clamping (Max) @ Ipp:
- 41.4V
- Current - Peak Pulse (10/1000µs):
- 9.7A
- 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
- Supplier Device Package:
- DO-214AC (SMA)
TPSMA30AHE3_B/I FAQ
1.How can I place an order for TPSMA30AHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA30AHE3_B/I 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 TPSMA30AHE3_B/I reliable?
The price and inventory of TPSMA30AHE3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMA30AHE3_B/I is usually 5 days.
3.What payment methods are accepted for TPSMA30AHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA30AHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA30AHE3_B/I?
TPSMA30AHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA30AHE3_B/I 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 TPSMA30AHE3_B/I?
For technical support, including TPSMA30AHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA30AHE3_B/I requirements.
6.How does Aetrix verify that TPSMA30AHE3_B/I is sourced from the original manufacturer or authorized distributors?
All TPSMA30AHE3_B/I 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 TPSMA30AHE3_B/I meets industry standards.
7.What is the process for return or replacement of TPSMA30AHE3_B/I?
All TPSMA30AHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA30AHE3_B/I, 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 TPSMA30AHE3_B/I part is unused and in its original packaging.
Return procedure for TPSMA30AHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMA30AHE3_B/I 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 …
