OneTech Integration · DC/DC Converters · 1/8 Brick Package

E08 Series

308W / 11A · 36–75V Input · Extreme 1/8 Brick

Industry-standard 1/8 Brick delivering 308W with patented Buck-Reset Forward topology and proprietary 60 nS ultra-fast current limiting that eliminates Short-Circuit-Current-Runaway — the destructive failure mode conventional modules cannot prevent.

>93% Efficiency 60 nS SCCR Guard 360 W/in³ −40°C to +110°C OCP · OVP · OTP Remote ON/OFF 4.8M hrs MTBF RoHS · CE

View All Models Request Sample ↓ Datasheet PDF

308_W

Max Output Power

360_W/in³

Power Density

>93_%

Peak Efficiency

E08 · 1/8 BRICK

E0848280IN20-11PSS · EXTREME 1/8 BRICK

Why E08 Series

Where Conventional Modules Cannot Be Used

The E08 was engineered to solve Short-Circuit-Current-Runaway — a failure mode that has plagued power designers for decades — while achieving best-in-class efficiency in the 1/8 Brick footprint.

⚡

Buck-Reset Forward Topology

Patented switching topology at 450 kHz achieves 93% conversion efficiency and 360 W/in³ in the industry-standard 1/8 Brick form factor without compromising reliability.

450 kHz · 360 W/in³ · 93% η

🛡

60 nS Ultra-Fast Current Limiting

Eliminates Short-Circuit-Current-Runaway — the destructive high current driven by minimum output voltage × propagation delay through low-impedance or non-Ohmic loads. Enables use in semiconductor test equipment where conventional modules fail.

60 nS propagation delay · SCCR eliminated

🌡

−40°C to +110°C Operation

Full-specification operation across a 150°C range. Full metal anodised aluminium alloy package with 4× M2 mounting inserts. Supports forced-air and cold-plate cooling.

−40°C to +110°C case temperature

📏

Industry-Standard 1/8 Brick

Standard 61.2 × 25.9 mm footprint and 8-pin assignment ensures direct drop-in compatibility. Full metal package provides EMI shielding and mechanical robustness. 32 g.

61.2 × 25.9 mm · 8-pin std · 32 g

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Voltage Trim & Remote Sense

Output voltage adjustable ±10% via TRIM pin. Remote sense pins (+S/−S) compensate up to 0.5 V of distribution loss, regulating precisely at the load regardless of trace resistance.

±10% trim · 0.5 V sense compensation

🔁

Remote ON/OFF Control

Positive or negative enable logic selectable via model number. Open-collector NPN or mechanical switch compatible. Input range −0.5V to +12V DC. Current drain −0.5 mA to +1.5 mA.

+3V–+6.5V high · 0V–+1V low

Complete Model List

Available Configurations

All models share the same 1/8 Brick footprint and 8-pin assignment. Select input bus (48V or 24V) and required output voltage. Contact OneTech Integration for custom voltages.

Part Number	Input Range	Max Input	Output Voltage	Output Current	Max Output	Efficiency
E0848280IN20-11PSS	36–75V	325 W	28.0 V	11 A	308 W	93.0%
E0848120xxxE-25xx0	36–75V	316 W	12.0 V	25 A	300 W	94.9%
E0848050xxxE-60xx0	36–75V	327 W	5.0 V	60 A	300 W	91.8%

Part Number	Input Range	Max Input	Output Voltage	Output Current	Max Output	Efficiency
E0824280xxxE-11xx0	18–36V	326 W	28.0 V	11 A	308 W	92.5%
E0824120xxxE-25xx0	18–36V	316 W	12.0 V	25 A	300 W	94.9%
E0824050xxxE-60xx0	18–36V	327 W	5.0 V	60 A	300 W	91.8%

★ Highlighted row = currently viewing model. Contact OneTech Integration for special input/output configurations.

Electrical Specifications

Complete Technical Parameters

All specifications at nominal input, full load, 25°C case temperature unless noted.

Input (48V Bus)

Operating Voltage Range+36V to +75V DC

Transient (100 ms max)100 V Maximum

Power-ON Threshold+34.0V to +36.0V

Power-OFF Threshold+31.2V to +33.2V

Off-State Input Current6 mA max (Vnom)

Latch-State Input Current8 mA max (Vnom)

Reflected Ripple Current20 mA rms / 60 mA p-p (L=10µH)

Input Capacitance20.0 µF max

Ripple Rejection (<1 kHz)−50 dB (Vnom, full load)

Remote Control (Pin 2)

Logic High — Enable ON+3.0V to +6.5V

Logic Low — Disable0V to +1.0V

PC Pin Voltage Range−0.5V to +12V DC

PC Pin Input Current−0.5 mA to +1.5 mA

Output (28V / 11A Model)

Rated Output Voltage28.0 V

Rated Output Current11 A

Rated Output Power308 W

Voltage Accuracy±1.0% typical

Line Regulation±0.2% (full input range)

Load Regulation±0.2% (0%–100%)

Temperature Drift±0.03%/°C (−40°C to +100°C)

Output Tolerance Band±4% (all conditions)

Ripple & Noise (20 MHz)3% p-p / 1% RMS Vo

Step Load Transient±6% Vo / 500µS @ 2.5A/µS

Voltage Trim Range±10% Vo

Start-Up Delay20 ms / 250 ms (Vnom, full load)

General

Switching Frequency450 kHz typical

MTBF4.80 × 10⁶ hrs (Bellcore TR-332)

Operating Temperature−40°C to +110°C (case)

Storage Temperature−55°C to +125°C

Input to Output Isolation2.0 kVdc

Input / Output to Case1.0 kVdc

Weight32 g

⚠ Absolute Maximum Ratings — Do Not Exceed Input voltage: −0.5V to +80V DC (continuous); 100V DC / 100 ms transient. Remote Control pin: −0.5V to +12V DC. Case temperature: −40°C to +110°C operating; −55°C to +125°C storage. Exceeding these limits may cause permanent damage.

OCP

Over Current Protection

108% – 125% Io

Auto-recovery after overload removed

OVP

Over Voltage Protection

115% – 130% Vo

Restart by recycling input or control pin

OTP

Over Temperature Protection

110°C ±5°C (Tc)

Internal case temperature sensing

Physical & Mechanical

Package & Pin Definitions

Industry-standard 1/8 Brick metal package. Gold-over-Nickel plated pins. Anodised aluminium alloy base plate with 4× M2 mounting inserts.

#	Name	Function
1	−IN	Negative Input
2	PC	Primary Control — Remote ON/OFF
3	+IN	Positive Input
4	+Vo	Positive Output
5	+S	Positive Remote Sense
6	TRIM	Output Voltage Adjust ±10%
7	−S	Negative Remote Sense
8	−Vo	Negative Output

Mechanical Specifications

Dimensions61.20 × 25.90 mm (2.41 × 1.02")

Base PlateAnodised aluminium alloy

MountingM2 × 4 inserts or through-hole

Max Torque1.3 in-lb (0.15 Nm)

Pin MaterialCopper alloy or Brass

Pin PlatingGold over Nickel

Weight32 g

Standoff (std)0.02" (0.51 mm)

Pin Length (c-code): 0 = 0.12" · 1 = 0.16" · 2 = 0.20" · 3 = 0.24"

Performance Data

Efficiency & Thermal Derating

Measured at nominal input, full output, 25°C. E08 achieves >93% peak at 48V/11A. Efficiency remains above 90% from 3A through 11A full load.

Start-Up Waveform

VIN: 48V · Load: 11A

Ch1 High: 28.2V · Ch2 High: 3.20V

Start-up delay: 20ms typ / 250ms max

Transient Response

Load: 5.5A ↔ 8.25A @ 2.5A/µS

Ch1 Max: 670mV · Ch1 Min: −600mV

Recovery: ±6% Vo within 500µS

Input / Output Ripple

VIN: 48V · 11A · LIN=10µH

Ch1 Pk-Pk: 86.0mV · RMS: 25.7mV

Ch2 Pk-Pk: 81.1mA · RMS: 0.42mA

Efficiency vs. Load Current

E0848280IN20-11PSS · 36V, 48V, 75V input

Derating Curves — Forced Air (Tc = 115°C)

E0848280IN20-11PSS · Airflow 0.1–2.0 m/s

20ms

Start-Up Delay

±6%

Step Load / 500µS

Output Ripple max

−50dB

Ripple Rejection

450kHz

Switching Freq.

Target Markets

Where E08 Series Works Best

The E08's 60 nS SCCR protection and 308W density make it the go-to 1/8 Brick for semiconductor test and HPC where conventional modules cannot safely operate.

🔬

Semiconductor Test Equipment

ATE, IC burn-in systems, and wafer test platforms with non-Ohmic load characteristics. Primary design target for SCCR elimination — low-impedance DUT loads that destroy conventional converters. E08's 60 nS limit prevents catastrophic short-circuit runaway.

ATEBurn-InWafer TestNon-Ohmic Load

🖥

High-Performance Computing

Server power rails, HPC clusters, GPU power delivery, and data center infrastructure requiring high-density 28V conversion. 308W in 1/8 Brick eliminates multiple smaller modules while maintaining >93% efficiency.

HPC ServersGPU RailsData Center

📡

Telecom & Datacom Infrastructure

−48V telecom bus (ETS 300 132-2 compliant), base stations, RRU/BBU power, and network switching. 2:1 input range handles the full −40.5V to −57V nominal and −50V to −72V extended range without derating.

Base Station48V BusETS 300 132-2

🏭

Industrial Controls & Automation

Factory automation, motion control, and process control systems requiring −40°C cold start and reliable operation to +110°C case temperature. 4.8M hrs MTBF and full metal package for long-term reliability in harsh environments.

−40°C Start4.8M hrs MTBFFull Metal

Part Number Builder

Configure Your Part Number

Build a valid E08 model number using the selectors below. Submit the completed part number when requesting a quote.

Part Number Builder

Select each option to generate your part number

Series

E08

Input Voltage Bus

48V Bus (36–75V)

24V Bus (18–36V)

Output Voltage

28.0V

12.0V

5.0V

Temperature Grade (a)

I — Industrial (−40/+110°C)

A — Advanced (−60/+130°C)

Enable Logic (b)

P — Positive (High = ON)

N — Negative (Low = ON)

Pin Length (c)

0 — 0.12"

1 — 0.16"

2 — 0.20"

3 — 0.24"

Standoff (d)

0 — 0.02" (0.51mm)

Generated Part Number

E0848280IN20

Request Quote →

Model Number Anatomy

E08Series — Extreme 1/8 Brick

24 / 48Input: 24 = 18–36V · 48 = 36–75V

280 / 120 / 050Output: 280=28V · 120=12V · 050=5V

I / A (a)I = Industrial −40/+110°C
A = Advanced −60/+130°C

P / N (b)Enable: P = Positive · N = Negative

0–3 (c)Pin length: 0=0.12" · 1=0.16" · 2=0.20" · 3=0.24"

0 (d)Standoff: 0 = 0.02" (0.51mm)

⚠ Factory Part Code Required — Model number alone is insufficient. Contact OneTech Integration for a complete ordering code.

sales@onetech-integration.com