My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMA5J8.5A-E3/61
- Part No.:
- SMA5J8.5A-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J8.5A-E3/61.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,990
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMA5J8.5A-E3/61 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on power and signal lines. It features a 8.5 V stand-off voltage (VWM), 9.44–10.4 V breakdown voltage (VBR at 1 mA), 14.4 V clamping voltage (VC) at 10 A peak pulse current, and 500 W peak pulse power rating with 10/1000 µs waveform - used to safeguard MOSFETs, ICs, and sensor interfaces against inductive switching transients in automotive and industrial control systems.
For engineers reviewing the SMA5J8.5A-E3/61 datasheet, SMA5J8.5A-E3/61 pinout, SMA5J8.5A-E3/61 application, or SMA5J8.5A-E3/61 equivalent, key selection criteria include clamping performance under 10 A surge, thermal resistance (RθJA = 80 °C/W), unidirectional polarity marking, RoHS-compliant matte tin plating, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped crowbar device triggered by reverse-biased avalanche breakdown. Its glass-passivated junction ensures stable VBR tolerance (±5 % typical) and low incremental surge resistance, enabling consistent clamping during repetitive 10/1000 µs surges up to 500 W. The device is rated for TJ = –55 °C to +150 °C and meets MSL Level 1 per J-STD-020 at 260 °C peak reflow.
Designed for surface-mount implementation, SMA5J8.5A-E3/61 uses a single cathode-band-marked SMA (DO-214AC) case with 2 terminals, no internal series impedance, and exhibits <1 ns response time. It is not intended for bidirectional use - bidirectional variants carry "CA" suffix (e.g., SMA5J8.5CA) and have different VBR limits and leakage behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - maximum continuous reverse operating voltage before significant leakage; sets upper limit for protected line DC bias. |
| VBR (min/max) | 9.44 V / 10.4 V at IT = 1 mA - defines reliable avalanche initiation window; critical for margin vs. system overvoltage thresholds. |
| VC @ IPPM | 14.4 V at 10 A - clamped voltage during full-rated 10/1000 µs surge; determines maximum stress on downstream ICs. |
| PPPM | 500 W - peak pulse power handling capability; defines survivability against standardized lightning/surge waveforms. |
| IFSM | 40 A - non-repetitive forward surge current rating (8.3 ms half-sine); relevant for accidental forward fault conditions. |
| RθJA | 80 °C/W - junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; governs derating above 25 °C ambient. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads. Cathode indicated by a single band on the body; anode is unmarked end. Meets UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-biased avalanche terminal | Connected to protected line; conducts during overvoltage to clamp to VC; must be routed to lowest-impedance return path. |
| Anode (unmarked end) | Reference/ground terminal | Typically tied to system ground or low-impedance return; establishes reference for clamping action and defines polarity. |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMA package | Enables high-density PCB layouts and compatibility with standard SMT pick-and-place equipment (0.208" × 0.157" footprint). |
| Glass-passivated junction | Ensures long-term stability of VBR and low parameter drift across temperature and lifetime stress conditions. |
| 500 W peak pulse power | Supports IEC 61000-4-5 Level 4 (4 kV) surge immunity when properly laid out with minimal trace inductance. |
| AEC-Q101 qualification option | HE3/HM3 variants available for automotive applications; SMA5J8.5A-E3/61 is commercial-grade but shares identical die and package design. |
| MSL Level 1 rating | Allows unlimited floor life and single reflow at 260 °C peak without baking - simplifies manufacturing flow. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs and body control modules from load dump and alternator transients. IC Role / Device Role: Unidirectional TVS placed between power rail and chassis ground to clamp spikes up to ±100 V. Use Value: Limits voltage seen by LDOs and microcontrollers to ≤14.4 V during 10 A surge events, preventing latch-up or gate oxide damage. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loops) from ESD and relay-switching noise in PLC I/O modules. IC Role / Device Role: TVS connected across signal and return lines to absorb fast-rising transients before reaching precision op-amps or ADC inputs. Use Value: Maintains signal integrity by suppressing >8 kV contact ESD (IEC 61000-4-2) with sub-1 ns response and <1 pF junction capacitance at VWM. |
| Consumer Power Adapter Input Stage | Telecom DC Power Feeds |
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters supplying USB-C PD or PoE-powered devices. IC Role / Device Role: Clamping diode on regulated 5 V/9 V/12 V outputs to prevent damage during feedback loop failure or capacitor short. Use Value: Delivers 500 W surge capacity without derating at 70 °C ambient, supporting compact thermally constrained adapter designs. |
Use Scenario: Protecting -48 V telecom power distribution boards from induced surges on long cable runs in central office environments. IC Role / Device Role: Unidirectional TVS mounted on each feed line to ground, sized for 10/1000 µs threat models per GR-1089-CORE. Use Value: Achieves 14.4 V clamping at 10 A while maintaining RθJA ≤ 80 °C/W on standard FR4 with 5 mm² copper pads - enabling reliable field deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J8.5A-M3/61 | Halogen-free, RoHS-compliant variant with identical electrical specs and SMA package; same VWM, VBR, VC, PPPM. | No functional difference; selected where halogen-free material compliance is mandated (e.g., EU public infrastructure projects). | Direct drop-in replacement if halogen-free bill-of-materials is required; no layout or test changes needed. |
| SMA6J8.5A-E3/61 | 600 W peak pulse power (vs. 500 W), same VWM/VBR/VC, larger thermal mass; RθJA = 65 °C/W on same pad layout. | Better surge margin for high-reliability telecom or railway applications where >500 W threats are specified. | Preferred when system-level surge testing exceeds IEC 61000-4-5 Level 4; requires verification of board space and thermal relief. |
Compared with SMA5J8.5A-M3/61, the SMA5J8.5A-E3/61 offers identical protection performance with standard RoHS compliance; versus SMA6J8.5A-E3/61, it trades 100 W pulse headroom for tighter board area and lower cost - optimal for cost-sensitive automotive and industrial designs meeting 500 W surge requirements.
Availability
SMA5J8.5A-E3/61 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and consumer power adapter designs requiring stable component supply, RoHS-compliant packaging, and repeatable surge clamping performance across production batches.
Supply support for SMA5J8.5A-E3/61 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, power density, and automotive-grade qualification.
The SMA5J series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density surface-mount surge suppression in space-constrained, high-reliability applications including automotive power nets and industrial I/O protection.
FAQ
What is the maximum clamping voltage of the SMA5J8.5A-E3/61 under rated surge conditions?
The SMA5J8.5A-E3/61 has a maximum clamping voltage (VC) of 14.4 V when subjected to its rated 10 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is SMA5J8.5A-E3/61 suitable for bidirectional transient protection?
No, SMA5J8.5A-E3/61 is a unidirectional TVS diode, identifiable by its cathode band marking. For bidirectional protection, Vishay specifies parts with "CA" suffix (e.g., SMA5J8.5CA). Using SMA5J8.5A-E3/61 in bidirectional configurations risks forward conduction during negative transients and invalidates clamping specifications.
What is the thermal resistance of SMA5J8.5A-E3/61, and how does it affect layout?
The SMA5J8.5A-E3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. Layout must replicate this pad area to achieve rated 500 W pulse power; reducing pad size increases junction temperature and requires derating per Figure 2 in the datasheet.
Does SMA5J8.5A-E3/61 meet automotive qualification standards?
The base SMA5J8.5A-E3/61 is commercial-grade and not AEC-Q101 qualified. However, Vishay offers functionally identical automotive variants under ordering codes SMA5J8.5AHE3_A/H (RoHS + AEC-Q101) and SMA5J8.5AHM3_A/H (halogen-free + AEC-Q101), sharing the same die, package, and electrical characteristics.
What is the reverse leakage current of SMA5J8.5A-E3/61 at its stand-off voltage?
At VWM = 8.5 V and TA = 25 °C, the SMA5J8.5A-E3/61 exhibits a maximum reverse leakage current (ID) of 1.0 µA. This low leakage ensures minimal power loss and signal interference in always-on circuits such as automotive wake-up lines or sensor bias networks.
SMA5J8.5A-E3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 8.5V
- Voltage - Breakdown (Min):
- 9.44V
- Voltage - Clamping (Max) @ Ipp:
- 14.4V
- Current - Peak Pulse (10/1000µs):
- 34.7A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J8.5A-E3/61 FAQ
1.How can I place an order for SMA5J8.5A-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J8.5A-E3/61 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 SMA5J8.5A-E3/61 reliable?
The price and inventory of SMA5J8.5A-E3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J8.5A-E3/61 is usually 5 days.
3.What payment methods are accepted for SMA5J8.5A-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J8.5A-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J8.5A-E3/61?
SMA5J8.5A-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J8.5A-E3/61 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 SMA5J8.5A-E3/61?
For technical support, including SMA5J8.5A-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J8.5A-E3/61 requirements.
6.How does Aetrix verify that SMA5J8.5A-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMA5J8.5A-E3/61 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 SMA5J8.5A-E3/61 meets industry standards.
7.What is the process for return or replacement of SMA5J8.5A-E3/61?
All SMA5J8.5A-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J8.5A-E3/61, 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 SMA5J8.5A-E3/61 part is unused and in its original packaging.
Return procedure for SMA5J8.5A-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA5J8.5A-E3/61 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 …
