Image shown is a representation only. Exact specifications should be obtained from the product datasheet.

Mean Well SPAN02B-03 DC-DC Converter - 2W - 18~36V in 3.3V out 500mA

SKU SPAN02B-03

Log in to see price Trade pricing & online ordering for account holders

Available to order

Overview

SPAN02B-03 is the 3.3V output model of this series: rated power 2W, typical efficiency 76%.

SPAN02 and DPAN02 series are 2W isolated and regulated module type DC-DC converter with SIP 8 package. It features international standard pins, a high efficiency up to 85%, wide working temperature range -40~+90℃, 1.5KVDC I/P-O/P isolation voltage, compliance to BS EN/EN55032 radiated class A without additional components, overload and continuous-mode short circuit protection, etc. The models account for different input voltage 4.5~9V, 9~18V, 18~36V and 36~75V 2:1 wide input range, and various output voltage, 3.3V/5V/12V/15V for single output and ±5V/±12V/±15V for dual outputs, which are suitable for all kinds of systems, such as industrial control, telecommunication field, distributed power architecture, and so on.

Features

SIP8 package with industry standard pinout
2:1 wide input range
Operating temperature range -40 ~ +90℃
No minimum load required
Comply to BS EN/EN55032 radiated Class A without additional components
High efficiency up to 85%
Protections: Short circuit (Continuous) / Overload
1.5KVDC I/O isolation
Remote ON/OFF control
3 years warranty

Specifications

SPAN02B-03Specifications from the official datasheet (2024-04-30 edition)

INPUT

INPUT VOLTAGE (RANGE): 24V (18 ~ 36V)
INPUT CURRENT NO LOAD: 18mA
INPUT CURRENT FULL LOAD: 90mA
VOLTAGE RANGE: 18~36Vdc ,
SURGE VOLTAGE (100ms max.): 5Vin models : 15Vdc ; 12Vin models : 25Vdc ; 24Vin models : 50Vdc ; 48Vin models : 100Vdc
FILTER: Internal capacitor
PROTECTION: Fuse recommended. 5Vin models: 1000mA Slow-Blow Type, 12Vin models: 500mA Slow-Blow Type, 24V and 48Vin models: 250mA Slow-Blow Type
INTERNAL POWER DISSIPATION: 500mW

OUTPUT

OUTPUT VOLTAGE: 3.3V
OUTPUT CURRENT: 0 ~ 500mA
EFFICIENCY (TYP.): 76%
CAPACITOR LOAD (MAX.)^{* For each output}: 500μF
VOLTAGE ACCURACY: ±1.5%
RATED POWER: 2W
RIPPLE & NOISE^Note.2: 75mVp-p
LINE REGULATION^Note.3: ±0.5%
LOAD REGULATION^Note.4: Single output models:±0.5%, Dual output models:±1%
SWITCHING FREQUENCY (Typ.): 100KHz

PROTECTION

SHORT CIRCUIT: Protection type : Continuous, automatic recovery
OVERLOAD: Protection type : Recovers automatically after fault condition is removed
UNDER VOLTAGE LOCKOUT Start-up voltage: 5Vin : 4.2Vdc ; 12Vin : 7.3Vdc ; 24Vin : 15.5Vdc ; 48Vin : 31Vdc
UNDER VOLTAGE LOCKOUT Shutdown voltage: 5Vin : 3Vdc ; 12Vin : 5.8Vdc ; 24Vin : 12Vdc ; 48Vin : 24Vdc

FUNCTION

REMOTE CONTROL: Power ON: R.C. ~ -Vin <0.8Vdc or open circuit; Power OFF: R.C. ~ -Vin >4 ~ 15Vdc

ENVIRONMENT

COOLING: Free-air convection
WORKING TEMP.: -40 ~ +90℃ (Refer to "Derating Curve")
CASE TEMPERATURE: +100℃ max.
WORKING HUMIDITY: 20% ~ 90% RH non-condensing
STORAGE TEMP., HUMIDITY: -55 ~ +125℃, 10 ~ 95% RH non-condensing
TEMP. COEFFICIENT: 0.03% / ℃ (0 ~ 85℃)
SOLDERING TEMPERATURE: 1.5mm from case of 1 ~ 3sec./260℃ max.
VIBRATION: 10 ~ 500Hz, 2G 10min./1cycle, period for 60min. each along X, Y, Z axes

SAFETY & EMC ( Note.5)

SAFETY STANDARDS: EAC TP TC 020/2011 (EAC TP TC 004 for 48Vin type only) approved
WITHSTAND VOLTAGE: I/P-O/P:1.5KVDC
ISOLATION RESISTANCE: I/P-O/P:100M Ohms / 500VDC / 25℃/ 70% RH
ISOLATION CAPACITANCE (Typ.): 10pF
EMC EMISSION: Parameter Standard Test Level

Conducted BS EN/EN55032(CISPR32) N/A
Radiated BS EN/EN55032(CISPR32) Class A
EMC IMMUNITY: Parameter Standard Test Level

ESD BS EN/EN61000-4-2 Level 2, ±8KV air, ±4KV contact
Radiated Susceptibility BS EN/EN61000-4-3 Level 2, 3V/m
EFT/Bursts BS EN/EN61000-4-4 Level 1, 0.5KV
Surge BS EN/EN61000-4-5 Level 1, 0.5KV Line-Line
Conducted BS EN/EN61000-4-6 Level 2, 3V(e.m.f.)
Magnetic Field BS EN/EN61000-4-8 Level 2, 3A/m

Parameter	Standard	Test Level
Conducted	BS EN/EN55032(CISPR32)	N/A
Radiated	BS EN/EN55032(CISPR32)	Class A

Parameter	Standard	Test Level
ESD	BS EN/EN61000-4-2	Level 2, ±8KV air, ±4KV contact
Radiated Susceptibility	BS EN/EN61000-4-3	Level 2, 3V/m
EFT/Bursts	BS EN/EN61000-4-4	Level 1, 0.5KV
Surge	BS EN/EN61000-4-5	Level 1, 0.5KV Line-Line
Conducted	BS EN/EN61000-4-6	Level 2, 3V(e.m.f.)
Magnetic Field	BS EN/EN61000-4-8	Level 2, 3A/m

OTHERS

MTBF: 2500Khrs MIL-HDBK-217F(25℃)
DIMENSION (L*W*H): 21.8*9.2*11.1mm (0.86*0.36*0.44 inch)
CASE MATERIAL: Non-Conductive black plastic (UL 94V-0 rated)
PACKING: 2.7g ; 14pcs/per tube, 2058pcs/147 tube/per carton

Test conditions and notes5

1.All parameters are specified at normal input(E:5Vdc, A:12Vdc, B:24Vdc, C:48Vdc), rated load, 25℃ 70% RH ambient.
2.Ripple & noise are measured at 20MHz by using a 12" twisted pair terminated with a 0.1μf & 47μf capacitor.
3.Line regulation is measured from low line to high line at rated load.
4.Load regulation is measured from 10% to 100% rated load.
5.The final equipment must be re-confirm that it still meet EMC directives. For guidance on how to perform these EMC tests, please refer to “EMI testing of component power supplies.”(as available on http://www.meanwell.com)

Technical drawings

SPAN02B-03 Plug Assignment — Plug Assignment

Typical applications

Downloads

Certificates2

Certificate (SPAN02-DPAN02-CE-sec)(EN) PDF Download

Certificate (SPAN-DPAN02-UK-dec)(EN) PDF Download

Test reports1

Test Report (SPAN02B-03)(EN) PDF Download

Catalogues2

Mean Well DC-DC Catalog PDF Download

Mean Well Catalog (Industrial) PDF Download

FAQ

Can I use the SPAN02B-03 to derive 3.3V for embedded logic from a 24V-class control supply?

Yes, it is suited to low-power embedded logic and control electronics that need constant 3.3V output from an 18-36VDC input range. Its 2W rating fits board-level electronics rather than higher-power subsystem loads.

Is the SPAN02B-03 suitable for PLC-adjacent sensing or interface boards that run at 3.3V?

It can be a fit for low-power interface or sensing circuits that need a regulated 3.3V rail and are supplied from 18-36VDC. The converter is constant voltage and compact at 21.8 × 9.2 × 11.1 mm, which suits dense control hardware.

Can this converter be used in industrial IoT or communications electronics that require 3.3V?

Yes, for low-power industrial IoT, monitoring, or communications circuits that operate at 3.3V and stay within the 2W rating. Its 18-36VDC input range matches systems built around higher-voltage control power.

Is the SPAN02B-03 a practical choice for compact automation electronics?

It is well suited to compact automation electronics because it combines a 2W output with a 21.8 × 9.2 × 11.1 mm package and 2.7g weight. Those specs support board-level use where available space is limited.

How does the SPAN02B-03 compare with the other SPAN02B models?

The listed SPAN02B siblings are all 2W converters with 18-36VDC input, but they differ in output. SPAN02B-03 is 3.3V and 500mA, SPAN02B-05 is 5V and 400mA, SPAN02B-12 is 12V and 167mA, and SPAN02B-15 is 15V and 134mA.

Can the SPAN02B-03 handle demanding temperature conditions?

It is specified for operation from -40°C to +90°C, which supports a broad industrial temperature envelope. No IP rating is shown in the product data, so the specs do not confirm outdoor or wet-location use.

Payment & Security

Payment methods

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Model	Power	Voltage	Current	IP Rating
Mean Well SPAN02E-15 DC-DC Converter - 2W - 4.5~9V in 15V out 134mA	2W	15V	134 Milliampere	IP20	View
Mean Well SPAN02E-12 DC-DC Converter - 2W - 4.5~9V in 12V out 167mA	2W	12V	167 Milliampere	IP20	View
Mean Well SPAN02E-05 DC-DC Converter - 2W - 4.5~9V in 5V out 400mA	2W	5V	400 Milliampere	IP20	View
Mean Well SPAN02E-03 DC-DC Converter - 2W - 4.5~9V in 3.3V out 500mA	2W	3.3V	500 Milliampere	IP20	View
Mean Well SPAN02C-15 DC-DC Converter - 2W - 36~75V in 15V out 134mA	2W	15V	134 Milliampere	IP20	View
Mean Well SPAN02C-12 DC-DC Converter - 2W - 36~75V in 12V out 167mA	2W	12V	167 Milliampere	IP20	View
Mean Well SPAN02C-05 DC-DC Converter - 2W - 36~75V in 5V out 400mA	2W	5V	400 Milliampere	IP20	View
Mean Well SPAN02C-03 DC-DC Converter - 2W - 36~75V in 3.3V out 500mA	2W	3.3V	500 Milliampere	IP20	View
Mean Well SPAN02B-15 DC-DC Converter - 2W - 18~36V in 15V out 134mA	2W	15V	134 Milliampere	IP20	View
Mean Well SPAN02B-12 DC-DC Converter - 2W - 18~36V in 12V out 167mA	2W	12V	167 Milliampere	IP20	View
Mean Well SPAN02B-05 DC-DC Converter - 2W - 18~36V in 5V out 400mA	2W	5V	400 Milliampere	IP20	View
Mean Well SPAN02A-15 DC-DC Converter - 2W - 9~18V in 15V out 134mA	2W	15V	134 Milliampere	IP20	View
Mean Well SPAN02A-12 DC-DC Converter - 2W - 9~18V in 12V out 167mA	2W	12V	167 Milliampere	IP20	View
Mean Well SPAN02A-05 DC-DC Converter - 2W - 9~18V in 5V out 400mA	2W	5V	400 Milliampere	IP20	View
Mean Well SPAN02A-03 DC-DC Converter - 2W - 9~18V in 3.3V out 500mA	2W	3.3V	500 Milliampere	IP20	View

Please log in to write a review.

{ "id":8442817773867, "variants" :[{ "context":"default", "variant_id": 45712917299499, "sku":"SPAN02B-03", "inventory_qty" : 0, "customer" :false, "custom_html" :"\u003ca class=\"text-current logged-out-price logged-out\" href=\"https:\/\/wellforces.co.nz\/customer_authentication\/redirect?locale=en\u0026region_country=NZ\"\u003e\n \u003cspan \u003ePlease \u003c\/span\u003e \u003cspan class=\"login-text\"\u003eLogin\u003c\/span\u003e \u003cspan\u003e for Pricing\u003c\/span\u003e\n \u003c\/a\u003e", "volume_html" :"\u003cvolume-pricing class=\"parent-display inside_product_form\" id=\"volume-pricing-main\" \u003e\u003c\/volume-pricing\u003e" } ] }